JP7360646B2 - Measuring device, measuring device control method, and measuring device control program - Google Patents

Description

The present invention relates to a measuring device, a measuring device control method, and a measuring device control program.

In recent years, technology has been proposed for measuring the current flowing through the main power distribution board and separately estimating the current flowing through each electrical device. A major advantage of this system is that it is possible to understand the power consumption of each device in the facility through main measurement at the distribution board.

For example, Patent Document 1 discloses that waveform data obtained by sampling the current and voltage waveforms at a measurement point at a predetermined waveform starting point, with one point of the main power line that is supplied from a power source to a plurality of electrical devices as a measurement point, is collected for each device. A signal processing system is described that estimates the operating status of each electrical device by separating the signal into waveform data. The waveform data can be separated by normalizing the waveform data starting from the waveform starting point and comparing it with the waveform pattern of each electrical device.

On the other hand, as the number of electrical devices connected to power lines increases, there are cases where a plurality of measurement points for sampling waveform data of the power line are used to perform arithmetic processing on a plurality of waveform data. For example, when a power generation device using sunlight or the like or an electric device such as an electric vehicle is connected to the main power supply, noise generated from a power conditioner that performs power conversion such as frequency conversion may mix into the main power supply. In order to cancel noise mixed into the main waveform data, it is effective to add a measurement point near the power conditioner and subtract the waveform data near the noise source from the main waveform data.

Furthermore, power equipment such as power conditioners and smart meters that convert power generated by power generators have processing functions that adjust and measure power waveforms. Therefore, by using a power device having these processing functions as a measuring device that samples waveform data, it is possible to measure waveform data at a plurality of points in some cases.

When calculating the waveform data measured at multiple measurement points on the power line, the sampling timing for sampling the waveform data is synchronized between the multiple measurement devices, and the waveform starting point is used as the reference for the time axis of the calculation. need to be synchronized.

In order to synchronize the sampling timing, for example, a wired communication line with a high communication speed is provided between a plurality of measuring devices, and the operation of the measuring devices is controlled using communication commands with little communication delay.

Further, in order to synchronize the sampling timing, each measuring device may be provided with a precise internal clock, and the sampling operation may be synchronized with the internal clock.

Patent No. 6219401

However, if multiple measurement devices are installed far apart or in isolated locations such as inside and outside a building, it may be difficult to install wired communication lines. was there. Furthermore, in wireless communication, there are cases in which it is difficult to synchronize sampling timings due to communication delays due to communication conditions and processing delays due to communication loads.

Furthermore, since a precise internal clock is expensive, providing it in each measuring device may increase the cost of the device.

Further, even if sampling timings are once synchronized between a plurality of measuring devices, synchronization may occur due to factors such as restarting each measuring device, and robustness may deteriorate.

The present invention has been made in view of the above circumstances, and provides a measuring device that can easily synchronize the timing of sampling at a plurality of measurement points that sample waveform data of a power line and improve robustness. One object of the present invention is to provide a measuring device control method and a measuring device control program.

(1) In order to solve the above problem, the measuring device of the embodiment includes a sampling section that samples at least one waveform of voltage or current at a measurement point of a power line at a predetermined sampling timing, and a sampling section that samples at least one waveform of voltage or current at a measurement point of a power line. a processing unit that executes processing of the waveforms that have been acquired; a setting information acquisition unit that acquires setting information that determines the operation; a settings holding unit that holds the setting information acquired in the setting information acquisition unit; and an operation control unit that controls the operation based on the setting information.

(2) In the measuring device of the embodiment, the operation control unit inquires of the time providing device that provides the standard time about the time to be set in the internal clock, and the setting information acquisition unit The setting information may be acquired after the inquiry is executed.

(3) Furthermore, in the measuring device of the embodiment, the setting information acquisition unit may acquire setting information from a setting information management device communicably connected via a network.

(4) Furthermore, in the measuring device of the embodiment, the sampling unit may sample the waveform at a sampling timing based on a zero-crossing point at which the sign of the waveform is reversed.

(5) In the measurement device of the embodiment, if settings related to a synchronization signal for synchronizing the sampling timing are set in the setting information, the operation control unit may be configured to perform other operations for sampling waveforms at measurement points of other power lines. It may also be used to control communication of synchronization signals with the measuring device.

(6) In the measuring device of the embodiment, the operation control unit also generates a synchronization signal that includes the value of an internal clock of another measuring device and the value of a wave number counter that counts zero-crossing points at which the polarity of the waveform to be sampled is reversed. It may also be used to control communications.

(7) In the measurement device of the embodiment, if the setting information is set to provide a synchronization signal, the operation control unit provides the synchronization signal to other measurement devices based on the processing timing of the process. It may be something.

(8) Furthermore, in the measuring device of the embodiment, the operation control section may simultaneously provide a synchronization signal to a plurality of other measuring devices.

(9) In the measurement device of the embodiment, if the setting information is set to acquire a synchronization signal, the operation control unit acquires a synchronization signal from another measurement device, and based on the acquired synchronization signal, The processing timing may be adjusted.

(10) Furthermore, in the measuring device of the embodiment, the operation control section may adjust the processing timing based on a zero-crossing point at which the sign of the waveform is reversed.

(11) Furthermore, in the measuring device of the embodiment, if the phase of the waveform to be sampled is set in the setting information, the operation control unit sets the phase of the waveform to be sampled by the sampling unit based on the setting information. It may be.

(12) In order to solve the above problems, a measuring device control method according to an embodiment is a measuring device controlling method for controlling a measuring device, in which at least one waveform of voltage or current at a measuring point of a power line is a sampling step of sampling at a predetermined sampling timing, a processing step of processing the waveform sampled in the sampling step, a setting information acquisition step of acquiring setting information that determines the operation, and a setting information acquisition step of acquiring the setting information that determines the operation. The method includes a setting holding step for holding setting information, and an operation control step for controlling operations based on the setting information held in the setting holding step.

(13) In order to solve the above problem, the measurement device control program of the embodiment provides the measurement device with a sampling function that samples at least one waveform of voltage or current at a measurement point of a power line at a predetermined sampling timing. , a processing function that executes processing of the sampled waveform in the sampling function, a setting information acquisition function that acquires setting information that determines the operation, a setting holding function that holds the setting information acquired in the setting information acquisition function, and a setting An operation control function that controls the operation based on the setting information held in the holding function is realized.

According to one embodiment of the present invention, the measuring device samples at least one waveform of voltage or current at a measurement point of a power line at a predetermined sampling timing, processes the sampled waveform, and operates. By acquiring setting information that defines the power line, retaining the acquired setting information, and controlling the operation based on the retained setting information, it is possible to easily adjust the timing of sampling at multiple measurement points for sampling power line waveform data. can be synchronized to improve robustness.

FIG. 1 is a block diagram showing an example of a measurement system configuration including a measurement device in an embodiment. FIG. 1 is a block diagram illustrating an example of a software configuration of a measurement system including a measurement device in an embodiment. FIG. 6 is a diagram illustrating an example of adjustment of (A) processing timing of a master device and (B) processing timing of a slave device in the embodiment. FIG. 6 is a diagram illustrating an example of adjustment of (A) processing timing of a master device and (B) processing timing of a slave device in the embodiment. It is a figure showing an example of adjustment of processing timing of a measurement device in an embodiment. It is a sequence diagram showing an example of operation of a measurement system including a measurement device in an embodiment. It is a block diagram showing an example of the hardware configuration of the measuring device in an embodiment. It is a flowchart which shows an example of operation of a setting information management device in an embodiment. It is a flowchart which shows an example of operation of a measuring device in an embodiment. It is a flowchart which shows an example of operation of a measuring device in an embodiment. It is a flowchart which shows an example of operation of a measuring device in an embodiment. It is a flowchart which shows an example of operation of a measuring device in an embodiment. It is a figure showing an example of adjustment of processing timing of a measurement device in an embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, a measuring device, a measuring device control method, and a measuring device control program in one embodiment of the present invention will be described in detail with reference to the drawings.

First, the system configuration will be explained using FIG. 1. FIG. 1 is a block diagram illustrating an example of a measurement system configuration including a measurement device according to an embodiment.

In FIG. 1, a measurement system 10 includes a measurement device 1 (measurement devices 1a to 1d). The measuring devices 1a to 1d are each installed to measure the voltage or current of a power line as a measurement target.

The measuring device 1a is connected to the power supply side of the distribution board 42 in the main trunk 40, which is a power line connected from the load side of the smart meter 41 whose power supply side is connected to the power line (power supply) of the electric power company to the power supply side of the distribution board 42. connected to. The housing of the measuring device 1a is installed inside or near the distribution board 42. The measuring device 1a measures at least one waveform of voltage or current with a measurement point on the power supply side of the distribution board 42 in the main trunk 40. Note that the details of the measuring device 1 will be described later.

The measuring device 1b is installed inside or near the smart meter 41, and measures at least one waveform of voltage or current with the load side of the smart meter 41 as a measurement point. The smart meter 41 is a power meter that digitally measures the power supplied to the load side and has a communication function within the meter. The smart meter 41 can transmit digital data of measured power usage status to a management server (not shown) of an electric power company at predetermined time intervals using a communication function. Note that since the measuring device 1b measures the voltage or current on the load side of the smart meter 41, it may be one that utilizes the function of measuring the voltage and current in the smart meter 41. For example, the measuring device 1b may be implemented as a function realized by software of the smart meter 41.

The distribution board 42 has a power supply side connected to the main trunk 40, a load side connected to a plurality of wirings, and distributes power from the power supply side to each wiring. The distribution board 42 can include an earth leakage breaker (not shown) for interrupting earth leakage, a main circuit breaker for interrupting main current, and a molded case circuit breaker for interrupting current in each wiring. Each wire on the load side is connected to the load side of a molded circuit breaker installed for each wire. Various electrical devices such as a refrigerator 31, a television 32, and an electric kettle 33 are connected to the load-side wiring. Note that the distribution board 42 may be a device having the function of the smart meter 41 or the function of a step-down transformer (for example, a cubicle-type high-voltage power receiving facility).

A power conditioner 43 and a solar power generator 34 are connected to the wiring on the load side of the distribution board 42 via a measuring device 1c. Further, an electric vehicle 35 is connected to the wiring on the load side of a circuit breaker (not shown) from the main trunk 40 via a measuring device 1d. In FIG. 1, the measuring device 1b and the measuring device 1d illustrate that the measuring point can be provided on the power supply side of the measuring device 1a. Moreover, the measuring device 1c illustrates that the measuring point can be provided on the power supply side of the measuring device 1a.

The measuring device 1c is connected to a power line near the power conditioner 43, and measures at least one waveform of voltage or current using the wiring near the power conditioner 43 as a measurement point. Further, the measuring device 1d is installed on the wiring connected to the electric vehicle 35, and measures at least one waveform of voltage or current with the wiring connected to the electric vehicle as a measurement point.

The power conditioner 43 is an inverter that converts the electric power generated by the solar power generator 34 from direct current to alternating current of commercial frequency (50 Hz or 60 Hz) and commercial voltage (single-phase 200 V or three-phase 200 V). By supplying power generated by the solar power generator 34 to the distribution board 42, the power conditioner 43 can supply power to other wiring. Note that the power conditioner 43 may supply power to a power line of a power company.

The power conditioner 43 may generate switching noise when frequency conversion is performed using an inverter. The generated switching noise propagates through the power line while being attenuated according to the impedance of the power line. Since the measurement device 1c uses the power line near the power conditioner 43 as a measurement point, it is possible to measure a waveform that strongly includes switching noise generated in the power conditioner 43.

Further, the electric vehicle 35 includes an on-vehicle inverter (not shown) that internally converts AC power supplied from the main trunk 40 into DC power. The DC power converted by the on-vehicle inverter is charged into an on-vehicle battery (not shown). On the other hand, the on-vehicle inverter can convert the DC power charged in the on-vehicle battery into AC power and supply it to the distribution board 42 . Like the power conditioner 43, the on-vehicle inverter may generate switching noise when converting the frequency. Since the measurement device 1d uses the wiring to the electric vehicle 35 as a measurement point, it is possible to measure a waveform that strongly contains noise generated by the electric vehicle 35.

In addition, although the measurement system 10 in FIG. 1 illustrates a case where four measurement devices 1 (measurement devices 1a to 1d) are installed, the number of measurement devices 1 installed in the measurement system 10 is limited to this. isn't it. For example, a plurality of measuring devices 1 may be installed as backup in case of failure.

Moreover, although FIG. 1 showed the case where the measuring device 1a is installed inside or near the electricity distribution board 42, the installation location of the measuring device 1a is not limited to this. For example, the measuring device 1a may be installed inside or near the smart meter 41.

Next, the functions of the measuring device 1 will be explained using FIG. 2. FIG. 2 is a block diagram showing an example of the software configuration of the measuring device 1. As shown in FIG. FIG. 2 shows only one measuring device 1 and omits illustration of other measuring devices 1.

Although only one measuring device 1 is shown in the measuring system 10 in FIG. 2, the measuring system 10 can include a plurality of measuring devices 1. The measuring device 1 is communicably connected to other measuring devices 1 via wireless communication. The communication method of the measuring device 1 may be other than wireless communication, and may be, for example, power line communication via a power line, wired communication via a LAN cable, short-range wireless communication, or the like.

The measuring device 1 includes a sampling section 11 , a processing section 12 , a setting information acquisition section 13 , a setting holding section 14 , an operation control section 15 , and a communication control section 16 . The above-mentioned functional units of the measuring device 1 in this embodiment will be described as functional modules realized by a measuring device control program (software) that controls the measuring device 1.

<Measuring device 1>
The sampling section 11 includes a time counter 111, a wave number counter 112, a voltage measurement section 113, and a current measurement section 114. The sampling unit 11 performs sampling of at least one waveform of voltage or current at a measurement point of the power line at a predetermined sampling timing. For example, the sampling unit 11 in the measuring device 1a shown in FIG. 1 samples the voltage or current waveform measured using the power supply side of the distribution board 42 in the master 40 as a measurement point. The voltage measuring section 113 samples the voltage waveform, and the current measuring section 114 samples the current waveform. The voltage measurement unit 113 samples a voltage waveform in a range of, for example, 100V to 200V or 220V to 240V. Further, the current measuring unit 114 samples the current waveform in a current range corresponding to the breaking current of the master circuit breaker.

The sampling unit 11 samples, for example, the voltage waveform detected by the voltage measurement unit 113 or the current waveform detected by the current measurement unit 114 at a predetermined timing (sometimes referred to as sampling timing). The sampling timing is determined by, for example, a time counter 111 that counts time in seconds and a wave number counter 112 that counts the number of waves in one second. In the present embodiment, an example will be described later in which the time counter 111 and the wave number counter 112 are used to set the waveform starting point in the sampling slot as the sampling timing. Note that the waveform starting point can be a zero-crossing point, which will be described later. The wave number counter 112 whose waveform starts at a zero-crossing point is sometimes referred to as a "zero-crossing counter" that counts zero-crossing points. The waveform data sampled by the sampling section 11 is, for example, analog data. In this embodiment, waveform data is not limited to analog data or digital data.

The processing unit 12 processes the waveform data sampled by the sampling unit 11 in a plurality of processing slots. A processing slot is a processing unit of waveform data, and is repeatedly executed at a predetermined cycle in synchronization with the voltage or current waveform of the power supply. A processing slot is, for example, a processing unit that is executed n times (for example, n=10 or n=20) in a period of 1 second, that is, every 1/n second. For example, for n=20 processing slots, one processing slot is executed in a processing time of 0.05 seconds. For example, a processing slot may be a processing unit determined by the number of clocks of an internal clock. The processing unit 12 repeatedly executes n processing slots from 0 to (n-1) at a predetermined period (eg, 1 second). In addition, in the embodiment, a case is illustrated in which the processing time in all processing slots is the same, but the processing time in each processing slot may be different in each processing slot.

The processing slots executed in the processing unit 12 can include, for example, the following.

(sampling slot)
The sampling slot is a processing slot in which the sampling unit 11 executes a process of sampling a waveform. In the sampling slot, the processing unit 12 causes the sampling unit 11 to perform sampling of the waveform at the “waveform starting point”. The waveform starting point is the timing at which the waveform is sampled in a sampling slot. For example, the waveform starting point can be predetermined based on the voltage or current waveform detected in the sampling slot.

For example, the waveform of a power supply with a commercial frequency of 50 Hz (period: 0.02 seconds) has a sampling slot of 2.5 times (0.05/0.02=2. 5) Will be included. The processing slots are executed in synchronization with the power waveform. Here, the waveform starting point is defined as "the zero-crossing point where the polarity of the waveform first changes from negative to positive in the sampling slot" or "the zero-crossing point where the polarity of the waveform changes from positive to negative for the second time in the sampling slot". ”, etc. The zero crossing point is the timing at which the polarity of the waveform is reversed, and can be easily detected. The waveform starting point is synchronized with the waveform starting point adjusted in another measuring device 1. Since the zero-crossing point is easy to detect, it can be easily detected even in other measuring devices 1 that synchronize the waveform starting point, and the device cost can be reduced. Further, by using the zero crossing point as the waveform starting point, the sampled waveform data becomes a waveform starting from the zero point, and processing such as normalization of the waveform data becomes easy.

(Other processing slots)
The processing section 12 includes, as other processing slots, a conversion slot for converting the analog waveform sampled in the sampling section 11 into a digital waveform (A/D conversion), a calculation slot for calculating the converted digital waveform, and a calculated digital waveform. A processing slot for storing waveform data of a waveform, a transmission slot for transmitting calculated waveform data, etc. can be executed. Note that the conversion slot may be executed in the same processing slot as the sampling slot.

Here, waveform data normalization processing will be exemplified below as an example of the digital waveform calculation executed in the calculation slot.

As an example of waveform data normalization processing, the processing unit 12 generates approximate waveform data of the analog waveform data from the sampled waveform start point to the waveform end point, and calculates the approximate waveform data based on the number of samples for one cycle of the analog waveform data and the waveform period. A normalized cycle is calculated, and approximate waveform data is sampled from the waveform starting point using the normalized cycle. The normalized waveform data is used for separation processing to separate waveform data for each electrical device. For example, a Factorial HMM (Hidden Markov Model) can be used to separate the waveform data. Specifically, first, model parameters that model the operating status of each electrical device are prepared in advance. Waveform data is separated into a plurality of state variables for each time series by Factorial HMM. The electrical device can be identified by comparing the separated state variables with model parameters prepared in advance. Note that a case where the above-mentioned separation process is executed in the measurement data management device 2 will be described later.

The setting information acquisition unit 13 acquires setting information that defines the operation of the measuring device 1. The setting information is information that predetermines the operation of the measuring device 1, and can include, for example, the following information.

<Setting information related to synchronization signal>
The setting information may include setting information related to a synchronization signal that synchronizes sampling timing in the plurality of measuring devices 1. The synchronization signal is a signal for synchronizing sampling timing in the plurality of measurement devices 1 (details will be described later). The synchronization signal is provided from the measuring device 1 to other measuring devices 1. Here, the measuring device 1 that provides synchronization signals to other measuring devices 1 is referred to as a "master device." Furthermore, the measuring device 1 that acquires the synchronization signal from the master device is referred to as a "slave device." That is, the synchronization signal is provided from the base unit to the slave unit. By synchronizing the sampling timings of the plurality of measuring devices 1, it is possible to synchronize the acquisition of voltage waveforms or current waveforms. The setting information related to the synchronization signal is information as to whether or not the measuring device 1 becomes the parent device, and if the setting information includes information that it becomes the parent device, the setting information that includes the information that it becomes the parent device is The acquired measuring device 1 is set as a parent device. In this case, the measuring device 1 that has acquired setting information that does not include information that it will become a parent device can be made a slave device (measuring device 1 that is not set as a parent device may be implicitly regarded as a slave device). . Further, the setting information may include information explicitly indicating that the device becomes a slave device. When the setting information includes information indicating that the measuring device 1 will become a slave device, the measuring device 1 that has acquired the setting information including the information that it will become a slave device is explicitly set as a slave device.

<Setting information related to setting the phase of the waveform to be sampled>
The setting information may include information related to setting the phase of the waveform to be sampled. The measuring device 1 that has acquired the setting information including information related to the setting of the phase of the waveform to be sampled sets (changes) the phase of the waveform to be sampled according to the setting information. If the power line to be sampled has a plurality of phases, the zero-crossing points of each phase will have a predetermined phase difference. For example, if the power line is a three-phase three-wire type, each phase of R, S, and T will have a phase difference of 120 degrees, so the zero-crossing point of each phase will also have a phase difference of 120 degrees. . Further, if the power line is a single-phase three-wire type, each phase of L1 and L2 will have a phase difference of 180 degrees, so the zero cross point of L1 and L2 will also have a phase difference of 180 degrees. By aligning the phases of the waveforms sampled in the plurality of measuring devices 1, it becomes possible to align the sampling timings of the respective measuring devices 1.

<Other settings information>
The setting information may include other information regarding the measuring device 1. For example, the configuration information includes information for setting the timing or frequency of providing synchronization signals, sampling timing (for example, sampling interval), valid communication channels (channels for transmitting waveform data), etc. You can leave it there. Further, the setting information may include information for stopping or starting the operation of the measuring device 1.

The setting information is provided from the setting information management device 5 communicably connected via the network 9 . The configuration information management device 5 includes a configuration information providing section 51 and a configuration information management section 52. The setting information management unit 52 stores and manages setting information corresponding to each measuring device 1 (eg, measuring devices 1a to 1d). Note that the setting information management unit 52 may set and store setting information from a terminal device (not shown). The configuration information providing unit 51 provides the configuration information managed by the configuration information management unit 52 to the configuration information acquisition unit 13. The setting information acquisition unit 13 can acquire the setting information after the operation control unit 15 inquires of the time providing device 6, which provides the standard time, about the time to be set in the internal clock. The time providing device 6 is, for example, an NTP (Network Time Protocol) server. The time providing device 6 may be a plurality of NTP servers.

In acquiring the setting information, for example, after the operation control unit 15 inquires of the time providing device 6 about the time to be set in the internal clock, the setting information acquisition unit 13 sends the setting information to the setting information management device 5. The setting information acquisition unit 13 may acquire the setting information by requesting provision and having the setting information management device 5 provide the setting information in response to the request. For example, after inquiring about the time set in the internal clock, the setting information acquisition unit 13 transmits an HTTP (Hypertext Transfer Protocol) request to the setting information management device 5. The HTTP request can include information for identifying the measuring device 1, such as the manufacturer's name, model or firmware version information, and serial number of the measuring device 1, as additional HTTP information. The configuration information management device 5 specifies the configuration information to be provided based on the information for specifying the measurement device 1 included in the received HTTP request, and sends the specified configuration information as an HTTP response to the configuration information acquisition unit 13. It may also be provided as follows.

In addition, in acquiring the setting information, the setting information management device 5 monitors whether the operation control unit 15 has made an inquiry to the time providing device 6 about the time to be set in the internal clock, and executes the inquiry. If this is confirmed, the setting information may be provided to the setting information acquisition unit 13. Note that in this embodiment, "acquisition" may refer to proactive acquisition (pull type acquisition) or active acquisition (push type acquisition). That is, the setting information acquisition unit 13 may actively receive push-type transmission of setting information from the setting information management device 5, or may actively download the setting information stored in the setting information management device 5. may be equal. Similarly, in the present embodiment, "provision" may be proactive provision (push-type provision) or active provision (pull-type provision). In other words, the operations of "obtaining" and "providing" do not limit the operator.

The setting holding unit 14 holds the setting information acquired by the setting information acquiring unit 13. Holding the setting information may mean storing the setting information inside the measuring device 1, or making setting information stored outside the measuring device 1 readable. For example, the setting holding unit 14 may hold link information to a storage location where setting information is stored.

The operation control section 15 controls the operation of the measuring device 1 based on the setting information held in the setting holding section. The operation of the measuring device 1 controlled by the operation control section 15 will be illustrated below.

<Time inquiry operation>
The operation control unit 15 inquires of the time providing device 6, which provides the standard time, about the time to be set in the internal clock. Further, when there is a configuration of the measuring device 1 (for example, new installation or change of the measuring devices 1a to 1n), an inquiry is made regarding the time to be set in the internal clock. Further, the operation control unit 15 may make an inquiry about the time after confirming that the internal clock is not set (for example, in the initial state).

<Main unit or slave unit setting operation>
Further, if settings related to the synchronization signal are set in the setting information, the operation control unit 15 executes a setting operation that makes the measuring device 1 a master device or a slave device. If the setting information includes information related to a synchronization signal, the operation control unit 15 sets the measuring device 1 as a master device or a slave device.

<Sampling waveform setting operation>
Further, when the setting information includes information related to setting the phase of the waveform to be sampled, the operation control unit 15 executes an operation to synchronize the waveforms. For example, if the power line is a three-phase, three-wire type, the waveform to be sampled is delayed (or advanced) by 120 degrees or 240 degrees. Further, if the power line is a single-phase three-wire type, the waveform to be sampled is delayed (or advanced) by 180 degrees (that is, the sign of the waveform is reversed). This allows the waveforms to be sampled to be synchronized.

<Synchronous signal communication operation>
Further, the operation control unit 15 controls communication of the synchronization signal with other measuring devices 1 when settings related to the synchronization signal to be synchronized are set in the setting information. Communication of a synchronization signal is, for example, communication related to providing (transmission) of a synchronization signal when the measuring device 1 is a master device. On the other hand, for example, when the measuring device 1 is a child device, the communication of the synchronization signal is communication related to acquisition (reception) of the synchronization signal. In this embodiment, a case will be exemplified in which the slave device requests the master device to acquire a synchronization signal, and the master device transmits the synchronization signal to the slave device in response to the request.

When the measuring device 1 is a child device, the operation control unit 15 obtains a request for providing a synchronization signal from another measuring device 1 communicably connected via the network. The operation control unit 15 requests provision of a synchronization signal under predetermined conditions. The predetermined condition that requests the provision of a synchronization signal is, for example, the passage of a predetermined time such as every hour, the execution of a processing slot a predetermined number of times, or an explicit operation by the operator such as pressing a reset button on the device. etc. On the other hand, when the measuring device 1 is a master device, the operation control unit 15 provides a synchronization signal based on the processing timing of the processing in the processing slot in response to a request from another measuring device 1.

The synchronization signal is information for synchronizing the processing timing of the processing slots, and can include information such as time information, the value of a wave number (zero cross) counter, sampling timing, and the number of the processing slot. For example, the synchronization signal is generated based on the execution status of the processing slot of the measuring device 1. The time information is, for example, the value of an internal clock included inside the measuring device 1. The value of the wave number counter is, for example, the number of zero crossings counted in one second. The sampling timing information is a wave number counter value indicating the sampling timing.

The processing slot number is the slot number of the processing slot being executed in the measuring device 1. The slot number is any integer from 1 to n when the number of processing slots is n. When the period of slot processing in the processing unit 12 is 1 second, the number of slots is 20, and all processing slots are executed in the same time, the sampling slot is executed in 0.05 seconds. Here, the processing of slot number 1 is executed for a period of 0 to 0.05 seconds, with 0 seconds as the processing start time. Further, the process of slot number 2 is executed for 0.05 to 0.10 seconds. That is, the slot number as a synchronization signal includes a time error of 1/n second at maximum (if the period is 1 second). The synchronization signal allows the waveform starting points to be roughly synchronized within an error range of 1/n. Therefore, even if communication between measuring device 1 and another measuring device 1 is delayed due to wireless communication, etc., the effect of the communication delay is within the range where the delay in wireless communication does not affect the slot number being executed. can be ignored.

<Synchronous operation>
When the measuring device 1 is a child device, the operation control unit 15 adjusts the processing timing of the sampling process or the process of the sampled waveform based on the acquired synchronization signal. The operation control unit 15 adjusts the processing timing of the processing in the processing slot based on the synchronization signal acquired from the master device. First, the operation control unit 15 roughly synchronizes the processing timing between the waveform starting point and the processing time of the processing slot (1/n: n is the number of processing slots) based on the synchronization signal. The operation control unit 15 then synchronizes the processing timing in detail based on waveforms such as zero crossing points.

Here, adjustment of the processing timing of processing slots in the operation control section 15 will be explained using FIGS. 3 to 5. 3 and 4 illustrate a process of roughly adjusting processing timing using slot numbers of processing slots.

FIG. 3 is a diagram illustrating an example of a temporal shift in processing timing in processing slots of a plurality of measuring devices 1. FIG. 3(A) is a time chart showing the processing timing of the processing slot of the measuring device 1 (master device). FIG. 3(B) is a time chart showing the processing timing of the processing slot of the measuring device 1 (slave device).

In FIG. 3A, the measuring device 1 (master device) executes 20 processing slots with slot numbers 0 to 19 in one second. That is, the processing time of one processing slot is 1/20=0.05 seconds. The processing slots are executed in the order of slot numbers 19→18→17, and after the processing slot with slot number 0 is executed, the processing slot with slot number 19 is executed again. Slot number 18 is a sampling slot. A black circle S in the sampling slot indicates the timing of waveform sampling.

In FIG. 3B, the measuring device 1 (slave device) executes 20 processing slots with slot numbers 0 to 19 in one second, similarly to the parent device. Here, the child device executes a processing slot with respect to the parent device during the delay time d1. Therefore, the sampling timing of the waveform is also delayed by the delay time d1. Although the delay time d in FIG. 3 or 4 is a positive value in which the processing timing of the slave unit is delayed, the delay time d is a negative value in which the processing timing of the slave unit is in advance. It's okay.

A delay in the execution of a processing slot occurs, for example, immediately after the slave unit is powered on (unsynchronized state). Furthermore, a delay in the execution of a processing slot occurs when the internal clock of the child device is out of sync with the internal clock of the parent device (a state where the synchronization is out of sync over time). The child device in this embodiment synchronizes the processing timing of processing slots caused by these states shown in FIG. 3.

Note that the present embodiment aims to synchronize the processing timing of sampling slots. Therefore, in adjusting the processing timing in the operation control section 15, the processing slots other than the sampling slots may be different in the plurality of measuring devices 1. Further, even if the number of processing slots is different and the processing time of one processing slot is different, it is sufficient that the processing timing of the sampling slots can be synchronized.

FIG. 4 is a diagram illustrating an example of how the operation control unit 15 adjusts the processing timing of the processing slot of the slave device. FIG. 4(A) is a time chart showing the processing timing of the processing slot of the measuring device 1 (master device). FIG. 4(B) is a time chart showing the processing timing of the processing slot of the measuring device 1 (slave unit) after adjustment by the operation control unit 15.

Since FIG. 4(A) is the same as FIG. 3(A), description thereof will be omitted. FIG. 4B is a time chart after adjusting the delay time d2 of the processing timing to be less than 1/20 (0.05) second, which is the processing time of the processing slot, using the synchronization signal. That is, d2<0.05 seconds. Since the synchronization signal is information indicating the processing slot being executed in the measuring device 1, the synchronization signal includes an error of 0.05 seconds depending on the timing of the request. The operation control unit 15 first roughly adjusts the processing timing including this error, so if the communication delay when acquiring the synchronization signal does not affect the slot number being processed, the delay time is ignored. be able to. This makes it possible to use an inexpensive communication means such as a wireless LAN in acquiring the synchronization signal.

FIG. 5 is a diagram showing an example of adjustment of the processing timing of the measuring device 1 (slave unit) in the operation control unit 15.

In FIG. 5, the sampling slot indicated by slot number 18 is executed in synchronization with the zero-crossing point of the waveform of the commercial power supply. The processing time of a sampling slot is 0.05 seconds. If the frequency of the commercial power source is 50 Hz, one processing slot will include a waveform with 2.5 cycles. If the processing timing of the processing slot is synchronized with the zero-crossing point where the polarity of the waveform is reversed from negative to positive, the sampling slot will include six zero-crossing points, z1 to z6. The operation control unit 15 can adjust the processing timing to the zero cross point of z1, z3, or z5. Which zero-crossing point to set the processing timing to can be set in the synchronization signal. The operation control unit 15 can synchronize the sampling timing indicated by the black circle S with the measuring device 1 by synchronizing the processing timing at the set zero-crossing point. This concludes the explanation of FIGS. 3 to 5, and returns to the explanation of FIG. 2.

Note that the above-mentioned functional units included in the measuring device 1 are examples of the functional units included in each device, and do not limit the functions included in each device. For example, each device does not need to have all of the above functional units, and may have some of the functional units. Further, each device may have other functions than those described above.

Furthermore, each of the above-mentioned functional units has been described as being realized by software. However, at least one of the functional units described above may be realized by hardware.

Further, any of the above functional units may be implemented by dividing one functional unit into a plurality of functional units. Furthermore, any two or more of the functional units described above may be integrated into one functional unit. That is, FIG. 2 expresses the functions of the measurement system 10 using functional blocks, and does not indicate, for example, that each functional section is constituted by a separate program file.

Moreover, each device may be a device realized by one casing, or a system realized by a plurality of devices connected via a network or the like. For example, the measuring device 1 may realize some or all of its functions using a virtual device such as a cloud service provided by a cloud computing system. That is, in the measuring device 1, at least one of the above functional units may be implemented in another device. Further, the measuring device 1 may be a general-purpose computer such as a desktop PC, or may be a dedicated device with limited functions.

The measurement data management device 2 includes a measurement data receiving section 21, a synchronous measurement data storage section 22, a synchronous measurement data processing section 23, a processed data storage section 24, and a measurement data providing section 25.

The measurement data receiving unit 21 receives measurement data (waveform data) transmitted from the plurality of measurement devices 1. The synchronous measurement data storage unit 22 stores measurement data synchronously measured by the plurality of measuring devices 1. For example, the synchronous measurement data storage unit 22 associates two pieces of waveform data measured synchronously by the two measuring devices 1, and stores the information about the association together with the two waveform data.

The synchronous measurement data processing unit 23 processes measurement data measured synchronously. For example, the synchronous measurement data processing unit 23 estimates the operating status of electrical equipment (refrigerator 31, television 32, and electric kettle 33). As described above, the operating status can be estimated by separating the waveform data into a plurality of state variables for each time series using the Factorial HMM and comparing them with model parameters prepared in advance. The synchronous measurement data processing unit 23 stores model parameters of each electrical device in advance. Since new electrical equipment products are always released, the measurement data management device 2 may acquire model parameters of the latest electrical equipment from a cloud server (not shown), for example. The synchronous measurement data processing unit 23 estimates the operating status of a target electrical device by reducing the influence of measurement data of other electrical devices by calculating the difference between a plurality of measurement data measured synchronously. becomes possible.

The processed data storage unit 24 stores the processed data processed in the synchronous measurement data processing unit 23. Further, the measurement data providing unit 25 provides the processing data stored in the processing data storage unit 24 to the user terminal 7 (for example, a desktop PC, a notebook PC, a tablet PC, a smartphone, etc.).

Next, the operation of the measurement system 10 described above will be explained using FIG. 6. FIG. 6 is a sequence diagram illustrating an example of the operation of the measurement system including the measurement device according to the embodiment.

In FIG. 6, the measurement system 10 includes two measuring devices 1, a measuring device 1a and a measuring device 1b, in which the measuring device 1a is set as a parent device, and the measuring device 1b is not explicitly set as a slave device and is a non-measuring device. This shows the case where it is explicitly regarded as a slave device.

The measuring device 1a inquires of the time providing device 6 about the time to be set in the internal clock (step S1-1), and obtains time information (step S2-1). Similarly, the measuring device 1b inquires of the time providing device 6 about the time to be set in the internal clock (step S1-2), and obtains time information (step S2-2). Note that the process of step S1-1 and the process of step S1-2 may be executed asynchronously in the state of the measuring device 1a (for example, the state immediately after installation) and the state of the measuring device 1a, respectively.

The configuration information management device 5 refers to the correspondence between the measurement device 1 and the configuration information stored in the configuration information management unit 52, and provides the measurement device 1a with configuration information including information related to the synchronization signal (step S3). That is, the measuring device 1a sets its own device as a parent device that provides a synchronization signal based on the provided setting information.

The measuring device 1a set as a parent device provides a synchronization signal to the measuring device 1b (step S41). The measuring device 1b sets itself as a child device by being provided with the synchronization signal.

The measurement device 1a samples the waveform at the measurement point at the sampling timing and provides the waveform data to the measurement data management device 2 (step S5-11). Furthermore, the measurement device 1b samples the waveform at the measurement point at the sampling timing and provides the waveform data to the measurement data management device 2 (step S5-21). The processes of step S5-11 and step S5-21 are repeatedly executed at each sampling timing (step S5-1n and step S5-2n).

The measuring device 1a provides a synchronization signal to the measuring device 1b at a predetermined timing (step S4n). The predetermined timing is the timing at which a difference in sampling timing between the master device and the slave device occurs, for example, when the power is turned on again. By providing a synchronization signal from the master device to the slave device at a predetermined timing, sampling timing can be easily synchronized and robustness can be improved.

Next, the hardware configuration of the measuring device 1 will be explained using FIG. 7. FIG. 7 is a block diagram showing an example of the hardware configuration of the measuring device 1 in the embodiment.

The measuring device 1 includes a CPU (Central Processing Unit) 101, a RAM (Random Access Memory) 102, a ROM (Read Only Memory) 103, a touch panel 104, and a communication I/F (Interface) 105. The measuring device 1 is a device that executes a measuring device control program that controls the measuring device 1 explained in FIG.

The CPU 101 controls the measuring device 1 by executing an information processing program stored in the RAM 102 or ROM 103. The measuring device control program is acquired from, for example, a recording medium on which the program is recorded or a program distribution server via a network, installed in the ROM 103, read out by the CPU 101, and executed.

The touch panel 104 has an operation input function and a display function (operation display function). The touch panel 104 allows the user of the measuring device 1 to input operations using a fingertip, a touch pen, or the like. Although the measuring device 1 in this embodiment uses a touch panel 104 having an operation display function, the measuring device 1 may have a display device having a display function and an operation input device having an operation input function separately. You can. In that case, the display screen of the touch panel 104 can be performed as a display screen of a display device, and the operation of the touch panel 104 can be performed as an operation of an operation input device. Note that the touch panel 104 may be realized in various forms such as a head-mounted display, a glasses-type display, a wristwatch-type display, and the like.

Communication I/F 105 is a communication I/F. The communication I/F 105 performs short-range wireless communication such as wireless LAN, wired LAN, and infrared rays, for example. Although only the communication I/F 105 is shown as the communication I/F in FIG. 7, the measuring device 1 may have communication I/Fs for each of a plurality of communication methods.

The detection unit 106 detects analog waveform data of current or voltage of the power line. The detection unit 106 can measure a voltage in a range of, for example, 100V to 200V or 220V to 240V. The detection unit 106 can measure the current with the upper limit being the contracted current. When the power source is a single-phase three-wire power source, the detection unit 106 may detect a total of three channels, for example, two current channels and one voltage channel.

Note that the illustrated hardware configuration is a partial example of the device configuration, and is not intended to limit the hardware configuration. The hardware configuration may include, for example, an input device such as a switch or a keyboard, a display device such as an LED, an audio output device such as a speaker, and the like.

Next, the operations of the measurement device 1, measurement data management device 2, and setting information management device 5 will be explained using FIGS. 8 to 12. 8 to 12 are flowcharts showing an example of the operation of the measuring device control program, the setting information management device control program, or the setting information management device control program in the embodiment. In the explanation of the flowcharts below, it is assumed that the measuring device 1, the measurement data management device 2, or the setting information management device 5 executes the operations. can be executed.

FIG. 8 shows the operation of the setting information management device 5 for providing setting information. In FIG. 8, the setting information management device 5 determines whether or not there is an inquiry about the time in the measuring device 1 (step S11). Whether or not there is an inquiry about the time in the measuring device 1 can be determined, for example, by monitoring and detecting the communication content of the measuring device 1. If it is determined that there is no time inquiry (step S11: NO), the setting information management device 5 repeats the process of step S11 and waits for the time inquiry to be detected.

On the other hand, if it is determined that there is an inquiry about the time (step S11: YES), the setting information management device 5 reads out the setting information stored in the setting information management section 52 (step S12), and transfers the setting information to the measuring device 1. (step S13), and the operation shown in the flowchart ends.

FIG. 9 shows a setting operation based on setting information of the measuring device 1. It is a flowchart which shows an example of operation of a measuring device in an embodiment.

In FIG. 9, the measuring device 1 determines whether setting information has been acquired (step S21). If it is determined that the setting information has not been acquired (step S21: NO), the measuring device 1 repeats the process of step S21 and waits for the acquisition of the setting information.

On the other hand, if it is determined that the setting information has been acquired (step S21: YES), the measuring device 1 determines whether or not the acquired setting information includes information related to a synchronization signal (step S22). If it is determined that information related to a synchronization signal is included (step S22: YES). The measuring device 1 determines whether the setting information includes a setting for providing a synchronization signal (step S23). If it is determined that a setting for providing a synchronization signal is included (step S23: YES), the measuring device 1 sets itself as a master device that provides a synchronization signal (step S24). On the other hand, if it is determined that the setting to provide a synchronization signal is not included (it is not a master device) or the setting to obtain a synchronization signal is included (it is a slave device) (step S23: NO), the measurement The device 1 sets itself as a child device that acquires a synchronization signal (including not setting it as a parent device) (step S25).

If it is determined in step S22 that the information related to the synchronization signal is not included (step S22: NO), or after executing the process in step S24 or the process in step S25, the measuring device 1 adds the acquired setting information to It is determined whether information related to phase setting is included (step S26). If it is determined that information related to the phase setting is included (step S26: YES), the measuring device 1 sets the delay or advance (including inversion of the waveform) of the waveform to be sampled based on the setting information (step S26: YES). S27). If it is determined that information related to phase setting is not included (step S26: NO), or after executing the process of step S27, the measuring device 1 ends the operation shown in the flowchart.

FIG. 10 shows the operation of sampling the waveform data of the measuring device 1. In FIG. 10, the measuring device 1 determines whether it is sampling time (step S31). The sampling time can be determined based on whether or not it is a sampling timing (for example, a predetermined zero-crossing point) in processing a sampling slot. If it is determined that it is not the sampling time (step S31: NO), the device repeats the process of step S31 and waits for the sampling timing.

On the other hand, if it is determined that it is sampling time (step S31: YES), the measuring device 1 samples the waveform data (voltage or current waveform) at the measurement point (step S32). The measuring device 1 processes the sampled waveform data (step S33). The measurement device 1 processes waveform data in a plurality of processing slots. Processing of waveform data includes, for example, A/D conversion of analog data or normalization of waveform data. The measurement device 1 transmits the processed waveform data to the measurement data management device 2 (step S34), and ends the operation shown in the flowchart.

FIG. 11 shows the synchronization signal providing operation in the measuring device 1 (base unit). In FIG. 11, the measuring device 1 determines whether a request for providing a synchronization signal has been acquired from the measuring device 1 (slave unit) communicably connected via the network (step S41). If it is determined that the request has not been obtained (step S41: NO), the base device repeats the process of step S41 and waits for the request to be obtained.

On the other hand, if it is determined that the request has been acquired (step S41: YES), the base device generates item information based on the processing timing of the processing slot currently being executed (step S42). The master device provides the generated synchronization signal to the slave device (step S43), and ends the operation shown in the flowchart.

FIG. 12 shows a synchronized operation of processing timing in the measuring device 1 (slave unit). In FIG. 12, the slave device determines whether to start synchronizing the processing timing (step S51). Synchronization is started, for example, when the handset is powered on or when a reset operation is performed. If it is determined not to start synchronization (step S51: NO), the child device repeats the process of step S51 and waits for the start of synchronization.

On the other hand, if it is determined that synchronization has started (step S51: YES), the child device requests the parent device to provide a synchronization signal (step S52). For example, the slave unit may recognize the address of the base unit on the network by receiving the first synchronization signal from the base unit, and the slave unit may recognize the address of the base unit on the network. A command (for example, a PING command) for confirming this may be sent, and the IP address of the device that responded may be requested to provide a synchronization signal.

After executing the process of step S52, the slave device determines whether a synchronization signal has been acquired (step S53). If it is determined that the synchronization signal has not been acquired (step S53: NO), the slave device waits to acquire the synchronization signal until a timeout occurs.

On the other hand, if it is determined that the synchronization signal has been acquired (step S53: YES), the slave device roughly adjusts the processing timing of the process in the processing slot (first adjustment) based on the acquired synchronization signal (step S54). ). Next, the slave device finely adjusts the processing timing (second adjustment) based on the waveform (step S55).

Next, the child device requests the parent device to provide a synchronization signal (step S56). The processing in step S56 is similar to the processing in step S52.

Next, the slave device determines whether synchronization of processing timing is completed (step S57). Whether or not the synchronization is completed can be determined by whether or not the above-mentioned zero-crossing point coincides with the base device. If it is determined that the synchronization of the processing timing is not completed (step S57: NO), the child device adjusts the zero-crossing point (step S58). After executing the process in step S58, the slave unit repeats the processes in steps S55 to S57 again to confirm that the synchronization is completed. On the other hand, if it is determined that the synchronization of the processing timing has been completed (step S57: YES), the slave device ends the processing shown in the flowchart.

In Figure 12, the case where the slave unit requests the base unit to provide a synchronization signal is shown, but for example, by including the address of the slave unit in the setting information, the base unit voluntarily requests the slave unit A synchronization signal may also be transmitted.

Note that the processing in each step of the flowchart described in this embodiment is not limited to the order of execution. For example, any process that can be executed in parallel may be executed first.

Next, adjustment of the processing timing of the measuring device 1 (slave device) will be explained using FIG. 13. FIG. 13 is a diagram illustrating an example of adjusting the processing timing of a slave device in the embodiment.

FIG. 13 shows the synchronization signal of the base unit and the synchronization signal of the slave unit for two cycles (0.02 seconds x 2 cycles) at the commercial frequency (50Hx). T(M), C(M) and S(M) are parameters of the synchronization signal in the base unit. T(S), C(S) and S(S) are parameters of the synchronization signal in the slave device.

T(M) is the value of the clock in the parent device. The clock value can be obtained from, for example, an internal clock included in the base device. T(S) is the value of the clock in the slave device. The clock value can be obtained from, for example, an internal clock included in the slave device.

C(M) is the value of a zero-cross counter that counts zero-cross points at which the polarity of the commercial waveform is reversed in the parent device. The value of the zero-crossing counter can be obtained, for example, by counting detected zero-crossing points in one second in the processing unit 12. For example, if the commercial frequency is 50 Hz, there are 50 zero-crossing points per second, so the value of the zero-crossing counter will be a value from 0 to 49. Similarly, C(S) is the value of a zero-cross counter that counts zero-cross points at which the sign of the commercial waveform is reversed in the slave unit.

S(M) is a value indicating the sampling timing in the base device. The sampling timing is the value of the zero cross counter indicating the waveform starting point. S (S) is a value indicating the sampling timing in the slave device.

In the first period (the first 0.02 seconds shown) at the commercial frequency, the parameters of the synchronization signal of the base unit are T(M)=948, C(M)=32, and S(M)=10. In addition, in the second cycle (second 0.02 seconds shown) at the commercial frequency, the parameters of the synchronization signal of the base unit are T(M)=948, C(M)=33, S(M)=10 It is. That is, in one cycle of the commercial frequency, the zero cross counter of the base unit is incremented by "1".

In the first cycle at the commercial frequency, the synchronization signals of the handset are T(S)=950, C(S)=3, and S(S)=25. That is, it is assumed that in the first cycle, there is a difference between the synchronization signal of the master device and the synchronization signal of the slave device. In the second period at the commercial frequency, the synchronization signals of the handset are T(S)=950, C(S)=4, and S(S)=25.

At the zero-crossing point where the second cycle starts, the base unit transmits parameters of the synchronization signal to the slave unit. The slave unit acquires the transmitted parameters, copies the acquired parameters to its own synchronization signal, and sets them. As a result, the parameters of the synchronization signal of the child device become T(S)=948, C(S)=33, and S(S)=10, which are the same values as those of the parent device, and the processing timing is adjusted.

After setting the parameters of the synchronization signal of the child device, a completion notification indicating that the parameter setting is completed is sent to the parent device. By receiving the completion notification, the base device can recognize that the parameter setting in the slave device has been successful. If the base device does not receive a completion notification within a predetermined time after transmitting the parameters of the synchronization signal, the base device may perform error processing. Error processing includes, for example, retransmitting the parameters of the synchronization signal, or recording or notifying that an error has occurred. In addition, if the master unit receives a completion notification within one commercial frequency cycle (within 0.02 seconds) from the transmission of the synchronization signal, it indicates that the transmitted synchronization signal was correctly set within the same cycle on the slave unit. It is possible to confirm that.

Note that the adjustment of the processing timing shown in FIG. 13 is based on the timing at which the synchronization signal is set in the slave unit because the base unit transmits the synchronization signal at the zero-crossing point where the second cycle starts as described above. must be within one cycle of the commercial frequency from the transmission of the synchronization signal. That is, the communication delay between the base unit and the slave unit must be within at least one cycle of the commercial frequency. For example, the slave unit may transmit a PING command and measure the response time from the base unit to measure communication delay and determine whether or not the processing timing adjustment shown in FIG. 13 can be executed. Good too.

Note that it is possible to record a program for realizing the functions constituting the device described in this embodiment on a computer-readable recording medium, and to cause a computer system to read and execute the program recorded on the recording medium. Accordingly, the various processes described above in this embodiment may be performed. Note that the "computer system" here may include hardware such as an OS and peripheral devices. Furthermore, the term "computer system" includes the homepage providing environment (or display environment) if a WWW system is used. Furthermore, "computer-readable recording media" refers to flexible disks, magneto-optical disks, ROMs, writable non-volatile memories such as flash memories, portable media such as CD-ROMs, hard disks built into computer systems, etc. storage device.

Furthermore, "computer-readable recording medium" refers to volatile memory (for example, DRAM (Dynamic It also includes those that retain programs for a certain period of time, such as Random Access Memory). Further, the program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in a transmission medium. Here, the "transmission medium" that transmits the program refers to a medium that has a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. Moreover, the above program may be for realizing a part of the above-mentioned functions. Furthermore, it may be a so-called difference file (difference program) that realizes the above-mentioned functions in combination with a program already recorded in the computer system.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and various modifications may be made without departing from the spirit of the present invention. It will be done.

1 Measuring device 10 Measurement system 11 Sampling section 111 Time counter 112 Wave number counter 113 Voltage measuring section 114 Current measuring section 12 Processing section 13 Setting information acquisition section 14 Setting holding section 15 Operation control section 16 Communication control section 2 Measurement data management device 21 Measurement Data receiving section 22 Synchronous measurement data storage section 23 Synchronous measurement data processing section 24 Processed data storage section 25 Measurement data providing section 31 Refrigerator 32 Television 33 Electric pot 34 Solar power generator 35 Electric vehicle 41 Smart meter 42 Distribution board 43 Power conditioner 5 Setting information management device 6 Time providing device 7 User terminal 9 Network 101 CPU
102 RAM
103 ROM
104 Touch panel 105 Communication I/F
106 Detection section

Claims (12)

a sampling unit that samples at least one waveform of voltage or current at a measurement point of the power line at a predetermined sampling timing;
a processing unit that executes processing of the waveform sampled in the sampling unit;
a configuration information acquisition unit that acquires configuration information that determines the operation;
a settings holding unit that holds the settings information acquired by the settings information acquisition unit;
an operation control unit that controls operations based on the setting information held in the setting holding unit;
When the phase of the waveform to be sampled is set in the setting information, the operation control unit controls the sampling timing in the sampling unit to sample the waveform at another measurement point based on the setting information. If the power line is a single-phase three-wire type, the sampling timing is set to match the phase of the waveform at the other measurement point based on the setting information. A measuring device. The operation control unit queries a time providing device that provides a standard time about the time to be set in an internal clock;
The measuring device according to claim 1 , wherein the setting information acquisition unit obtains the setting information after the time inquiry is executed. The measuring device according to claim 1 or 2 , wherein the configuration information acquisition unit acquires the configuration information from a configuration information management device communicably connected via a network. The measuring device according to any one of claims 1 to 3 , wherein the sampling unit samples the waveform at a sampling timing based on a zero-crossing point at which the sign of the waveform is reversed. The operation control unit controls communication of the synchronization signal with the other measuring device when a setting related to a synchronization signal for synchronizing the sampling timing is set in the setting information. The measuring device according to any one of the items. 5. The operation control unit controls communication of the synchronization signal including a value of an internal clock of the other measuring device and a value of a wave number counter that counts a zero-crossing point at which the polarity of the waveform to be sampled is reversed. The measurement device described in . 6. The operation control section provides the synchronization signal to the other measuring device based on the processing timing of the process when the setting information is set to provide the synchronization signal. The measurement device described in . The measuring device according to claim 7 , wherein the operation control section simultaneously provides the synchronization signal to a plurality of the other measuring devices. The operation control section includes:
If the setting information is set to acquire a synchronization signal, acquire the synchronization signal from the other measuring device,
The measuring device according to claim 5 or 6 , wherein the processing timing of the processing is adjusted based on the acquired synchronization signal. The measuring device according to claim 9 , wherein the operation control section adjusts the processing timing based on a zero-crossing point at which the sign of the waveform is reversed. A measuring device control method for controlling a measuring device, the method comprising:
a sampling step of sampling at least one waveform of voltage or current at a measurement point of the power line at a predetermined sampling timing;
a processing step of processing the waveform sampled in the sampling step;
a configuration information acquisition step of acquiring configuration information that determines the operation;
a settings retention step for retaining the settings information acquired in the settings information acquisition step;
an operation control step of controlling an operation based on the setting information held in the setting holding step;
In the operation control step, if the phase of the waveform to be sampled is set in the setting information, the sampling timing in the sampling step may be adjusted based on the setting information, and the waveform may be sampled at another measurement point. If the power line is a single-phase three-wire type, the sampling timing is set to match the phase of the waveform at the other measurement point based on the setting information. A measuring device control method. to the measuring device,
a sampling function that samples at least one waveform of voltage or current at a measurement point of the power line at a predetermined sampling timing;
a processing function that executes processing of the waveform sampled in the sampling function;
a setting information acquisition function that obtains setting information that determines the operation;
a settings retention function that retains the settings information acquired in the settings information acquisition function;
and an operation control function that controls operations based on the setting information held in the setting holding function,
In the operation control function, if the phase of the waveform to be sampled is set in the setting information, the sampling timing in the sampling function may be changed to sample the waveform at another measurement point based on the setting information. If the power line is a single-phase three-wire type, the sampling timing is set to match the phase of the waveform at the other measurement point based on the setting information. A measurement device control program that allows you to achieve this .

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