JP5679176B2 - Voltage measuring device - Google Patents

Description

  The present invention relates to a voltage measuring device that measures the voltage of a surge signal included in an input signal.

  As this type of voltage measuring apparatus, the applicant discloses a voltage measuring apparatus using an AC signal (AC voltage) supplied via a commercial power line as an input signal in the following patent document. This voltage measuring device includes a low-pass filter that functions as an anti-aliasing filter for the A / D converter in the subsequent stage, and a low-speed A / D converter that samples a signal that has passed through the low-pass filter and outputs voltage calculation data (sampling period: About 15 kHz), and a voltage measurement unit having a measurement circuit for measuring the voltage of the input signal based on the voltage calculation data, and a high-speed A / D for sampling the input signal and outputting the surge voltage detection data Converter (sampling period: approx. 2 MHz), high-pass filter that generates surge voltage data corresponding to the surge voltage (surge signal) superimposed on the input signal from the surge voltage detection data, and the surge voltage indicated by the surge voltage data Voltage of surge voltage by comparing voltage with reference value And a surge voltage detection unit has a detection circuit for outputting a detection signal (pulse signal) when exceeding the reference value.

  In this voltage measurement device, a voltage measurement unit having a low-pass filter, a low-speed A / D converter and a measurement circuit measures the voltage of an input signal, and a surge voltage detection unit having a high-speed A / D converter, a high-pass filter and a detection circuit Generates surge voltage data corresponding to the surge voltage, compares the surge voltage voltage indicated by the surge voltage data with the reference value, and outputs a detection signal when the surge voltage exceeds the reference value Thus, it is possible to reliably detect the surge voltage based on the surge voltage data directly generated corresponding to the surge voltage while accurately measuring the voltage of the input signal. It is also possible to accurately measure the signal length of the surge voltage and the peak value of the surge voltage based on the generated surge voltage data.

Japanese Patent Laying-Open No. 2005-345335 (page 2-7, FIG. 1)

  However, this voltage measuring device has the following problems to be improved. That is, in this voltage measuring apparatus, each time the surge voltage detection unit detects a surge voltage (surge signal) and outputs a detection signal, the control unit performs a predetermined time before and after the output point of the detection signal in the voltage calculation data. To store the minute data in the memory to accurately measure the voltage of the input signal, and the data for a predetermined time before and after the detection signal output time of the surge voltage data In order to accurately measure the peak value, a process for storing the peak value in a memory is executed.

  Some electric devices connected to the commercial power supply line continuously generate a surge voltage. Therefore, in this voltage measuring device, a large-capacity memory and a large amount of data are stored in this memory so that each of the above-described processes can be surely executed for each of the surge voltages continuously generated in this way. Since expensive hardware (hardware composed of expensive electronic devices capable of high-speed operation) for storing data in a short time is essential, there is a problem to be solved that increases the cost of the entire apparatus. ing.

Further, in this voltage measuring apparatus, for all detected surge voltages, voltage calculation data for a predetermined time, surge voltage data for a predetermined time, surge voltage signal length (pulse width), and surge voltage peak Since these values are stored in memory, the amount of stored data becomes large when these measurements take a long time. As a result, the data is aggregated after the measurement, and the surge voltage generation period and surge voltage characteristics. There is also a problem to be solved that it takes a lot of time for the specific work.

  The present invention has been made in view of the above problems, and a main object of the present invention is to provide a voltage measuring device that can simplify the totaling operation of measured data while reducing the device cost.

  In order to achieve the above object, the voltage measuring apparatus according to claim 1, a first A / D converter that samples an input signal, converts it into first voltage data indicating a voltage of the input signal, and outputs the first voltage, and a current time A timepiece unit for generating and outputting time data indicating the first time, a first storage unit including a first buffer memory and a first main memory, a peak value of the surge signal included in the input signal, and the surge signal A first measurement unit that measures a pulse width based on the first voltage data and outputs the pulse width together with a detection signal indicating detection of the surge signal; and inputs the first voltage data and stores the first voltage data in the first buffer memory A first storage process, a section measurement process for measuring a predetermined measurement unit section in a time longer than the sampling period of the first A / D converter, and the detection signal output from the first measurement section A detection process to be detected for each measurement unit section, and the peak value and the pulse width output from the first measurement unit together with a specific detection signal among the detection signals detected by the detection process, Corresponding to the time data when the detection signal is detected, it is stored in the first main memory as specific characteristic data for the specific surge signal corresponding to the specific detection signal, and also stored in the first buffer memory The first voltage data stored in the first main memory as the first specific voltage data for the specific surge signal is stored in the first main memory for the specific period including the specific surge signal in the first voltage data. A processing unit configured to be capable of executing a data storage process, wherein the processing unit includes the first storage process, the interval measurement process, and the detection. When the detection signal is detected in the measurement unit interval next to the measurement unit interval in which the detection signal is not detected while continuing the processing, only the first detection signal in the next measurement unit interval is detected. The first data storage process is performed as the specific detection signal, and the peak value and the pulse width output from the first measurement unit together with the specific detection signal are used to indicate the start of the surge generation period. The first voltage data stored in the first buffer memory and stored in the first main memory as the specific characteristic data for the head surge signal in association with the time data when the detection signal is detected The first voltage data of the specific period including the head surge signal is the first specific voltage data for the head surge signal. Then, when the detection signal is not detected in the measurement unit section next to the measurement unit section in which the detection signal is detected and stored in the first main memory, the time when the next measurement unit section is started Time data is stored in the first main memory as time data indicating the end of the surge occurrence period.

  According to a second aspect of the present invention, there is provided the voltage measuring apparatus according to the first aspect, wherein the first A / D conversion unit samples the input signal, converts the input signal into first voltage data indicating the voltage of the input signal, and outputs the first voltage data. Generating and outputting a clock unit, a first storage unit including a first buffer memory and a first main memory, a peak value of a surge signal included in the input signal and a pulse width of the surge signal A first measurement unit that measures based on the first voltage data and outputs it together with a detection signal indicating the detection of the surge signal, and a first storage process for inputting the first voltage data and storing it in the first buffer memory , A section measurement process for measuring a measurement unit section defined in advance in a time longer than the sampling period of the first A / D converter, and the detection signal output from the first measurement section as the measurement unit section The specific detection signal is detected by detecting the peak value and the pulse width output from the first measurement unit together with the specific detection signal among the detection signals detected by the detection process. In correspondence with the time data at the time, the first main memory stores the specific characteristic data for the specific surge signal corresponding to the specific detection signal, and the first buffer memory stores the first characteristic data. A first data storage process for storing in the first main memory the first voltage data of a specific period including the specific surge signal of one voltage data as the first specific voltage data for the specific surge signal; and Maximum that specifies the maximum value of the peak value output from the first measurement unit together with the detection signal detected by the detection process A processing unit configured to be able to execute a specific process, wherein the processing unit continuously executes the first storage process, the section measurement process, and the detection process, and the detection signal is not detected. When the detection signal is first detected in the measurement unit interval next to the measurement unit interval, and the measurement unit interval in which the detection signal is first detected and over the measurement unit intervals after the measurement unit interval When the maximum value is specified by executing the maximum value specifying process, only the detection signal for which the first detected signal and the peak value are specified as the maximum value are used as the specific detection signal. 1 data storage processing is performed, and the peak value and the pulse width output from the first measurement unit together with the specific detection signal are added to the detection signal detected first. The detection in which the specific value data for the head surge signal is associated with the time data when the specific detection signal indicating the start of the surge occurrence period is detected, and the peak value is specified as the maximum value. The signal is stored in the first main memory as the specific characteristic data for the maximum surge signal in correspondence with the time data when the specific detection signal is detected, and stored in the first buffer memory. Among the first voltage data, the first voltage data of the specific period including the head surge signal is used as the first specific voltage data for the head surge signal, and the maximum of the first voltage data is The first voltage data of the specific period including the surge signal is the first voltage data for the maximum surge signal. When the detection signal is not detected in the measurement unit interval next to the measurement unit interval in which the detection signal is detected and stored as constant voltage data in the first main memory, the next measurement unit interval is started. The time data of the hour is stored in the first main memory as time data indicating the end of the surge occurrence period.

  Further, in the voltage measuring device according to claim 3, in the voltage measuring device according to claim 1 or 2, the processing unit executes a counting process for counting the number of occurrences of the detection signal in the surge occurrence period, The counted number of occurrences corresponding to the corresponding surge occurrence period is stored in the first main memory.

  The voltage measuring device according to claim 4 is the voltage measuring device according to claim 3, wherein the processing unit counts the number of occurrences in each measurement unit section in the surge occurrence period as the counting process. At the same time, the number of occurrences is stored in the first main memory in association with the time data specifying the corresponding measurement unit section.

  The voltage measuring device according to claim 5 is the voltage measuring device according to any one of claims 1 to 4, wherein the input signal is input and output as an output signal, and the output signal is output from the first signal. A second A / D converter that samples at a sampling period longer than that of the 1A / D converter, converts the second voltage data indicating the instantaneous value of the output signal, and outputs the second voltage data; a second buffer memory; and a second main memory A second storage unit, and a second measurement unit that measures and outputs an electrical parameter of the output signal based on the second voltage data, and the processing unit inputs the second voltage data. Synchronized with the storage of the first voltage data from the first buffer memory to the first main memory in the second storage process to be stored in the second buffer memory and the first data storage process. The measured electrical parameter is stored in the second main memory, and the second voltage data stored in the second buffer memory is used as second specific voltage data for the specific surge signal. 2 A second data storage process to be stored in the main memory is executed.

In the voltage measuring device according to claim 1, for all detected surge signals, a conventional voltage measuring device that stores waveform data of a specific period including the surge signal in the input signal and specific characteristic data of the surge signal is provided. Unlike the surge generation period (period in which the surge signal is continuously generated over one or more measurement unit sections), each surge is accompanied by each time data indicating the start and end of this surge generation period. storing specific characteristic data and the first specific voltage data only measured and for the beginning surge signal of the waveform data and the specific characteristic data signal.

Therefore, according to this voltage measuring apparatus, even if the generation factor of the surge signal is continuously generated (that is, when the surge generation period is continuously generated), each measurement unit section in each surge generation period The number (frequency) of data transfer (storage) from the first buffer memory to the first main memory can be significantly reduced. This eliminates the need for expensive hardware for transferring and storing a large amount of data in the memory in a short time, and greatly reduces the memory capacity of the first main memory for storing waveform data. Therefore, the apparatus cost can be greatly reduced. Further, according to this voltage measuring apparatus, even if the measurement time of the surge signal for the input signal is long, the data collection work performed after the measurement and the generation period of the surge signal ( the start of the surge generation period and It is possible to greatly simplify the specific work at the end of the process and greatly reduce the time required for the work.

The voltage measuring device according to claim 2 is a conventional voltage measuring device that stores, for all detected surge signals, waveform data of a specific period including the surge signal in the input signal and specific characteristic data of the surge signal. Unlike the surge generation period (period in which the surge signal is continuously generated over one or more measurement unit sections), each surge is accompanied by each time data indicating the start and end of this surge generation period. signal waveform data and the specific characteristics specific characteristic data and the first specific voltage data for the beginning surge signal of the data, as well as specific including the maximum surge signal which is required for identifying the characteristics of the surge signal (maximum power) Only the first specific voltage data and the specific characteristic data of the maximum surge signal for the waveform of the period are measured and stored.

Therefore, according to this voltage measuring apparatus, even if the generation factor of the surge signal is continuously generated (that is, when the surge generation period is continuously generated), each measurement unit section in each surge generation period The number (frequency) of data transfer (storing) from the first buffer memory to the first main memory can be reduced. This eliminates the need for expensive hardware for transferring and storing a large amount of data in the memory in a short time, and greatly reduces the memory capacity of the first main memory for storing waveform data. Therefore, the apparatus cost can be greatly reduced. Further, according to this voltage measuring apparatus, even if the measurement time of the surge signal for the input signal is long, the data collection work performed after the measurement and the generation period of the surge signal ( the start of the surge generation period and The task of specifying the characteristics of the final surge and the maximum surge signal can be greatly simplified, and the time required for the task can be greatly shortened.

  In the voltage measuring device according to the third aspect, the processing unit counts the number of detection signals generated during the surge occurrence period for each surge occurrence period and stores the count corresponding to the surge occurrence period. Therefore, according to this voltage measuring apparatus, it is possible to specify the generation status of a surge signal for each surge generation period (for example, how much a surge signal is generated in each surge generation period) based on the number of detections.

  In the voltage measuring device according to the fourth aspect, the processing unit counts the number of occurrences of the detection signal in each measurement unit section in the surge generation period. Therefore, according to this voltage measuring device, based on the number of times of detection, a more detailed generation state of the surge signal in each surge generation period (for example, how much surge signal is generated in which section in the surge generation period) Can be measured.

  According to the voltage measuring device of the fifth aspect, in synchronization with the storage of the first voltage data from the first buffer memory to the first main memory, the second identification of the waveform of the input signal not including the surge signal Since the voltage data and the electrical parameters are stored in the second main memory, the number (frequency) of data transfer (storage) from the second buffer memory to the second main memory is reduced, and the memory of the second main memory The waveform of the input signal including the surge signal (the waveform of the surge signal) can be measured by comparing with the waveform of the input signal not including the surge signal while reducing the capacity.

1 is a block diagram showing a configuration of a voltage measuring device 1. FIG. It is a signal waveform diagram for demonstrating the measurement operation | movement about the input signal Si of the voltage measuring device 1, An upper stage is a signal waveform figure of the input signal Si containing the surge signal Ss, A middle stage is input signal Si in the surge generation period Ses1. The enlarged waveform diagram and the lower part are waveform diagrams showing the absolute value of the surge signal Ss in the middle part of the waveform diagram. It is a wave form diagram for demonstrating the relationship between the absolute value of the surge signal Ss, and the detection signal St.

  Hereinafter, embodiments of a voltage measuring device will be described with reference to the accompanying drawings.

  First, the configuration of the voltage measuring device 1 will be described. As an example, an AC signal (AC voltage) supplied to a commercial power line is used as an input signal Si, and a surge signal Ss (transient over signal (also an impulse signal)) included in the input signal Si is measured. An example in which the power source quality analyzer is applied to the voltage measuring apparatus 1 will be described.

  As shown in FIG. 1, the voltage measurement device 1 includes a surge signal detection unit 2, a parameter measurement unit 3, a clock unit 4, a first storage unit 5, a second storage unit 6, a processing unit 7, and a display unit 8. As shown in FIG. 2, the input signal Si on which the surge signal Ss is superimposed is configured to measure the waveform of the input signal Si from which the surge signal Ss has been removed and each voltage of the surge signal Ss.

  The surge signal detection unit 2 includes a first A / D conversion unit 11, a high-pass filter 12, and a first measurement unit 13. The first voltage data indicates the voltage (instantaneous value) of the input signal Si on which the surge signal Ss is superimposed. D1 is output to the processing unit 7. Further, the surge signal detector 2 detects the superposition of the surge signal Ss on the input signal Si based on the first voltage data D1, outputs the detection signal St, and characteristic data about the surge signal Ss (see FIG. 3, the peak value Vp and its polarity shown in FIG. 3 and the pulse width tp of the surge signal Ss are measured and output to the processing unit 7. In the following, the “peak value Vp” indicates a numerical value indicating the peak value Vp and a polarity (positive or negative).

  Specifically, the first A / D converter 11 is configured to include an A / D converter and an anti-aliasing filter (none of which is shown) arranged in front of the A / D converter, and an input on which the surge signal Ss is superimposed. The first voltage data D1 indicating the voltage (instantaneous value) of the input signal Si by sampling the signal Si at a short sampling period (for example, a period of a high sampling frequency (2 MHz as an example) that can reliably sample the surge signal Ss). And output to the high-pass filter 12 and the processing unit 7. The input signal Si may include a noise signal having a lower level in addition to the surge signal Ss. However, in order to facilitate understanding of the invention, the input signal Si will be ignored below.

  The high-pass filter 12 is composed of a high-pass digital filter, and has a high-frequency signal component (surge signal Ss; signal shown in the lower part of FIG. 2) exceeding the commercial power supply frequency (for example, 60 Hz) from the first voltage data D1. ) Is extracted and output to the first measuring unit 13 as surge voltage data Ds.

  The first measurement unit 13 is configured by a DSP (Digital Signal Processor) as an example, and calculates the absolute value of the voltage of the surge signal Ss indicated by the surge voltage data Ds as shown in FIG. The value is compared with a predetermined threshold voltage Vth, and it is detected that the surge signal Ss is superimposed when the calculated absolute value is equal to or higher than the threshold voltage Vth. When the first measuring unit 13 detects the surge signal Ss, the peak value Vp and the pulse width tp (the absolute value of the surge signal Ss is equal to or higher than the threshold voltage Vth) for each detected surge signal Ss. Time). Further, when the first measuring unit 13 detects the surge signal Ss, the first measuring unit 13 outputs a detection signal St indicating the detection (detection fact) of the surge signal Ss to the processing unit 7 and synchronizes with the output of the detection signal St. Then, the measured peak value Vp and pulse width tp are output to the processing unit 7.

  The parameter measurement unit 3 includes a low-pass filter 21, a second A / D conversion unit 22, and a second measurement unit 23, and outputs second voltage data D2 indicating a voltage (instantaneous value) for the fundamental wave of the input signal Si. Further, the parameter measuring unit 3 based on the second voltage data D2 includes at least one of electrical parameters such as the effective value, the average value, and the absolute value of the peak value (the actual value of the fundamental wave of the input signal Si). In the example, the effective value Ve) is measured and output as an example.

  Specifically, the low pass filter 21 functions as an anti-aliasing filter for the second A / D converter 22. The low-pass filter 21 receives the input signal Si and outputs it as an output signal S1.

  The second A / D converter 22 includes an A / D converter (not shown), and the input signal Si from which the surge signal Ss has been removed by the low-pass filter 21 is used as the sampling period of the first A / D converter 11. Second voltage data indicating a voltage (instantaneous value) of the input signal Si that is sampled at a longer sampling period (for example, a period of a low sampling frequency of about 15 kHz (for example, 15.36 kHz)). It converts into D2, and outputs it to the 2nd measurement part 23. The second measurement unit 23 is configured by a DSP as an example, and continuously inputs the second voltage data D2 from the second A / D conversion unit 22 and outputs it to the processing unit 7. The second measurement unit 23 calculates (measures) the effective value Ve of the input signal Si at a constant period based on the input second voltage data D2 and outputs the calculated value to the processing unit 7.

  The clock unit 4 includes a real-time clock IC as an example, generates time data Dt indicating the current time (in this example, year / month / day / hour / minute / second), and outputs the time data Dt to the processing unit 7.

  As an example, the first storage unit 5 includes a first buffer memory 31 configured by a RAM, and a first main memory 32 configured by a portable semiconductor memory (external storage medium) such as an SD memory card or a USB memory, A memory controller (not shown). The first buffer memory 31 temporarily stores the first voltage data D1 transferred from the processing unit 7 in a FIFO (first-in-first-out) system by a predetermined data amount. In addition, the first buffer memory 31 receives the first voltage data D1 of the predetermined specific period Tw from the stored first voltage data D1 by the memory controller that operates according to the control of the processing unit 7. The data is transferred to the first main memory 32 as 1 specific voltage data D1s. The first main memory 32 stores the peak value Vp and pulse width tp output from the processing unit 7 and the first specific voltage data D1s transferred from the first buffer memory 31. In this example, the specific period Tw (see FIG. 2) of the first voltage data D1 transferred as the first specific voltage data D1s is defined as a period of, for example, a length of several ms including a specific surge signal Ss described later. Yes.

  As an example, the second storage unit 6 includes a second buffer memory 41 configured by a RAM, a second main memory 42 configured by a portable semiconductor memory (external storage medium) such as an SD memory card or a USB memory, A memory controller (not shown). The second buffer memory 41 temporarily stores the second voltage data D2 transferred from the processing unit 7 in a FIFO (first-in-first-out) system by a predetermined data amount. The second buffer memory 41 receives the second voltage data D2 of the specified specific period Tw from the stored second voltage data D2 by the second memory controller operating according to the control of the processing unit 7. The specific voltage data D2s is transferred to the second main memory 42. The second main memory 42 stores the electrical parameter (effective value Ve in this example) output from the processing unit 7 and the second specific voltage data D2s transferred from the second buffer memory 41.

  The processing unit 7 includes a CPU and an internal memory (both not shown), and includes a first storage process, a section measurement process, a detection process, a first data storage process, a maximum value specifying process, and a second storage process. Then, the second data storage process and the display process are executed.

  Specifically, in the first storage process, the processing unit 7 inputs the first voltage data D1 from the first A / D conversion unit 11 and stores the first voltage data D1 in the first buffer memory 31 using the FIFO method. In the section measurement process, the processing unit 7 repeatedly executes measurement of the measurement unit section Se for a predetermined time. In this case, the length (time T1) of the measurement unit section Se can be set to an arbitrary time as long as it is longer than the sampling period of the first A / D conversion unit 11, but in this example, as an example, It is defined as a length (about 160 ms) that is a multiple of the fundamental wave of the power supply (60 Hz in this example) (for example, 10 waves). In the detection process, the processing unit 7 detects, for each measurement unit section Se, whether or not the detection signal St is output from the first measurement unit 13.

  In the first data storage process, the processing unit 7 also includes the peak value Vp output from the first measurement unit 13 of the surge signal detection unit 2 together with the specific detection signal St among the detection signals St detected by the detection process. The pulse width tp is associated with the time data Dt when the specific detection signal St is detected, and is stored in the first main memory 32 as specific characteristic data regarding the specific surge signal Ss corresponding to the specific detection signal St. Store (transfer to first main memory 32 to store). Further, in the first data storage process, the processing unit 7 includes the first voltage data in the specific period Tw including the specific surge signal Ss in the first voltage data D1 stored in the first buffer memory 31. D1 is transferred and stored in the first main memory 32 as the first specific voltage data D1s for the specific surge signal Ss. In this example, the specific surge signal Ss includes the first surge signal Ss (first surge signal Ss1) output in synchronization with the start of a later-described surge generation period Ses, and the peak value Vp in the surge generation period Ses. This is the maximum surge signal Ss (maximum surge signal Ss2). In the maximum value specifying process, the processing unit 7 sets the maximum value Vpmax for the peak value Vp of the surge signal Ss corresponding to the detection signal St detected by the detection process for each surge occurrence period Ses (an example is shown in FIG. 2). Thus, it specifies over every measurement unit area Se in each surge generation period Ses in every surge generation period Ses1, Ses2, Ses3, ....

  In the second storage process, the processing unit 7 inputs the second voltage data D2 from the second measurement unit 23 and stores the second voltage data D2 in the second buffer memory 41 using the FIFO method. In the second data storage process, the processing unit 7 transfers (stores) the first voltage data D1 (first specific voltage data D1s) from the first buffer memory 31 to the first main memory 32 in the first data storage process. The measured electrical parameter (the electrical parameter measured by the second measuring unit 23. In this example, the effective value Ve) corresponds to the second main memory 42 and the first specific voltage data D1s. And the same time data Dt as the time data Dt stored in the first main memory 32. In the second data storage process, the processing unit 7 sets the second voltage data D2 stored in the second buffer memory 41 as the second specific voltage data D2s for the specific surge signal Ss to the second main memory 42. Transfer and memorize. As an example, the processing unit 7 uses the first voltage data transferred to the first main memory 32 as described above from the second voltage data D2 stored in the second buffer memory 41 in the second data storage process. A period corresponding to a specific period Tw for D1 (a period including the specific period Tw and longer than the specific period Tw. Specifically, a period of one period or more for the fundamental wave of the input signal Si (for example, an integral multiple of one period) The second voltage data D2 in the period of time)) is transferred to and stored in the second main memory 42 as the second specific voltage data D2s. In the display process, the processing unit 7 reads arbitrary data from the data stored in the first main memory 32 and the second main memory 42 and causes the display unit 8 to display the data.

  The display unit 8 is configured by an LCD (Liquid Crystal Display) as an example, and displays data input from the processing unit 7 on the screen.

  Next, the measuring operation of the surge signal Ss by the voltage measuring device 1 will be described.

  First, in the surge signal detection unit 2, the first A / D conversion unit 11 samples the input signal Si to generate the first voltage data D1, and outputs the first voltage data D1 to the processing unit 7 and the high pass filter 12. The high pass filter 12 A signal component for the surge signal Ss is extracted from the one voltage data D1 and is output to the first measuring unit 13 as the surge voltage data Ds. The first measuring unit 13 detects the surge signal Ss by calculating the absolute value of the voltage of the surge signal Ss indicated by the surge voltage data Ds and comparing the calculated absolute value with the threshold voltage Vth. Running repeatedly.

  At this time, in the parameter measurement unit 3, the low-pass filter 21 removes signal components (including the surge signal Ss) having a frequency higher than the fundamental frequency (commercial power supply frequency) from among the frequency components included in the input signal Si. Then, the output signal S1 is output, and the second A / D converter 22 samples the output signal S1, and the voltage of the input signal Si that does not include the surge signal Ss (mainly the instantaneous value of the fundamental wave of the input signal Si). The second voltage data D2 shown is generated and output to the second measuring unit 23. The second measurement unit 23 continuously inputs the second voltage data D2 and outputs the second voltage data D2 to the processing unit 7, and based on the input second voltage data D2, the effective value Ve of the input signal Si is constant. It is calculated (measured) at a cycle and output to the processing unit 7.

  At this time, the processing unit 7 executes the first storage process, the second storage process, the section measurement process, and the detection process. Specifically, the processing unit 7 stores the first voltage data D1 input from the first A / D conversion unit 11 in the first buffer memory 31 by executing the first storage process. Further, the processing unit 7 stores the second voltage data D2 input from the second measurement unit 23 in the second buffer memory 41 by executing the second storage process. In addition, the processing unit 7 repeatedly performs the measurement of the measurement unit section Se having a length of time T1 by executing the section measurement process (measurement unit sections Se1, Se2 as shown in FIG. 2 as an example). , Se4,...)). In addition, the processing unit 7 detects whether or not the detection signal St is output from the first measurement unit 13 for each measurement unit section Se by executing a detection process.

  In such an operating state, as shown in the upper waveform diagram of FIG. 2, the surge generation period Ses in which the surge signal Ss is superimposed on the input signal Si (for example, the first surge generation period Ses1 shown in FIG. 2). When the surge signal Ss is superimposed on the input signal Si, the first measurement unit 13 detects that the absolute value of the voltage of the surge signal Ss is equal to or higher than the threshold voltage Vth, Each surge signal Ss included in this surge occurrence period Ses1 is detected. The first measuring unit 13 measures the peak value Vp and the pulse width tp for each surge signal Ss together with the detection signal St each time the surge signal Ss is detected, and outputs it to the processing unit 7.

  The processing unit 7 detects the input of the detection signal St by the detection process in the measurement unit section Se2 currently being measured. In this case, the processing unit 7 detects the detection signal St in the measurement unit section Se2 as the measurement unit section next to the measurement unit section Se1 in which the detection signal St is not detected. For this reason, the processing unit 7 executes the first data storage process using the first detection signal St in the measurement unit section Se2 as the specific detection signal St.

  In the first data storage process, the processing unit 7 uses the peak value Vp and the pulse width tp output from the first measurement unit 13 together with the first detection signal St, and the time when the first detection signal St is detected. Corresponding to the data Dt (the data indicating the start time of the surge occurrence period Ses1) is stored in the internal memory, and a specific surge signal Ss corresponding to the first detection signal St (after the undetected measurement unit interval) The first main memory 32 stores the specific characteristic data for the first surge signal Ss (first surge signal Ss1). Further, in the first data storage process, the processing unit 7 uses the first voltage data D1 of the specific period Tw including the head surge signal Ss1 among the first voltage data D1 stored in the first buffer memory 31. Is transferred to the first main memory 32 as the first specific voltage data D1s for the head surge signal Ss1, and stored in correspondence with the time data Dt when the first detection signal St is detected. Thereby, the first data storage process using the first detection signal St as the specific detection signal St is completed.

  Further, when executing the first data storage process, the processing unit 7 also executes the second data storage process. In the second data storage process, the processing unit 7 transfers (stores) the first voltage data D1 (first specific voltage data D1s) from the first buffer memory 31 to the first main memory 32 in the first data storage process. The effective value Ve input from the second measurement unit 23 is stored in the second main memory 42 in synchronization with the second voltage data D2 stored in the second buffer memory 41 as described above. The second voltage data D2 in the period corresponding to the specific period Tw of the first voltage data D1 transferred to the first main memory 32 (including the specific period Tw and longer than the specific period Tw) is used for the leading surge signal Ss1. The second specific voltage data D2s is transferred to the second main memory 42 and stored. Further, when storing the effective value Ve and the second specific voltage data D2s in the second main memory 42, the processing unit 7 stores the effective value Ve and the time data Dt when the first detection signal St is detected.

  In addition, the processing unit 7 performs this measurement every time it detects the detection signal St in the measurement unit section Se2 in which the first detection signal St is detected and each of the measurement unit sections Se3, Se4,... After the measurement unit section Se2. A count process for counting the number of detection signals St (number of occurrences of the detection signal St) N in the unit section Se2 is executed. Further, each time the processing unit 7 detects the detection signal St over the measurement unit section Se2 in which the first detection signal St is detected and the measurement unit sections Se3, Se4,... After the measurement unit section Se2, A maximum value specifying process for specifying the maximum value Vpmax for the peak value Vp is executed.

  In this maximum value specifying process, the processing unit 7 stores the peak value Vp input together with the first detection signal St in the internal memory as the first maximum value Vpmax, and the pulse width tp input together with the peak value Vp, The time data Dt when the peak value Vp is input is also stored in the internal memory. Thereafter, each time the detection signal St is detected, the peak value Vp input together with the detection signal St is compared with the maximum value Vpmax stored in the internal memory, and the newly input peak value Vp is larger than the maximum value Vpmax. Sometimes, the maximum value Vpmax is specified by updating and storing the newly input peak value Vp as the maximum value Vpmax. When the maximum value Vpmax is updated, the processing unit 7 also internally stores the pulse width tp input together with the peak value Vp updated and stored as the maximum value Vpmax and the time data Dt when the peak value Vp is input. Update and store in memory.

  As an example, as shown in the lower waveform diagram of FIG. 2 (waveform diagram of the absolute value of the surge signal Ss), in the measurement unit section Se2, the peak value Vp input together with the last detected detection signal St is the maximum value Vpmax. It becomes. In the measurement unit section Se3, the peak value Vp input together with the detection signal St detected first is larger than the maximum value Vpmax in the measurement unit section Se2 (exceeds the maximum value Vpmax). The maximum value Vpmax from the measurement unit section Se2 to the measurement unit section Se3 is obtained.

  In this way, in the measurement unit section Se2 to which the peak value Vp stored as the maximum value Vpmax is input, the processing unit 7 performs a peak at each time point (end of the measurement unit section Se2) when measurement of the measurement unit section Se2 is completed. The first data storage process is executed with the detection signal St stored as the maximum value Vpmax as the specific detection signal St, and is output from the first measurement unit 13 of the surge signal detection unit 2 together with the specific detection signal St. The peak value Vp and the pulse width tp are stored in the first main memory 32 as specific characteristic data for the maximum surge signal Ss2 in association with the time data Dt when the specific detection signal St is detected. In this example, the processing unit 7 stores in the internal memory the maximum value Vpmax, the pulse width tp input together with the peak value Vp stored as the maximum value Vpmax, and the time data Dt when the peak value Vp is input. Therefore, these data are read from the internal memory, transferred to the first main memory 32 as specific characteristic data, and stored.

  In addition to the storage of the specific characteristic data, the processing unit 7 generates a surge signal (maximum surge signal Ss2) corresponding to the specific detection signal in the first voltage data D1 stored in the first buffer memory 31. ) Including the first voltage data D1 of the specific period Tw including the first surge voltage Ss2 is transferred to the first main memory 32 as the first specific voltage data D1s for the maximum surge signal Ss2, and stored in correspondence with the specific characteristic data. In addition, when the measurement of the measurement unit section Se2 is completed (the end of the measurement unit section Se2), the processing unit 7 reads out the number of detections N from the internal memory and uses the time data Dt for specifying the measurement unit section Se2. Correspondingly (stored as the number of times of detection N in the measurement unit section Se2) is stored in the first main memory 32. In this case, as the time data Dt for specifying the measurement unit section Se2, the time data Dt at the time when the measurement of the measurement unit section Se2 is started or when the measurement is completed can be used.

  Further, when the processing unit 7 executes the first data storage process using the detection signal St stored with the peak value Vp as the maximum value Vpmax as the specific detection signal St as described above, the processing unit 7 also executes the second data storage process. Run. In the second data storage process, the processing unit 7 transfers (stores) the first voltage data D1 (first specific voltage data D1s) from the first buffer memory 31 to the first main memory 32 in the first data storage process. The effective value Ve input from the second measurement unit 23 is stored in the second main memory 42 in synchronization with the second voltage data D2 stored in the second buffer memory 41 as described above. Second voltage data D2 in a period (including this specific period Tw and longer than this specific period Tw) corresponding to the specific period Tw of the first voltage data D1 transferred to the first main memory 32 is the maximum surge signal Ss2. Is transferred to and stored in the second main memory 42 as the second specific voltage data D2s. Further, when storing the effective value Ve and the second specific voltage data D2s in the second main memory 42, the processing unit 7 stores the specific detection signal St in association with the time data Dt when it is detected.

  Further, as described above, also in the measurement unit section Se3, the processing unit 7 inputs the peak value Vp stored as the maximum value Vpmax. Therefore, in the same manner as the operation at the end of the measurement unit section Se2 described above, At each time point when the measurement of the measurement unit section Se3 is completed (the end of the measurement unit section Se3), the first data storage process is executed with the detection signal St stored as the maximum value Vpmax as the specific detection signal St. The peak value Vp and the pulse width tp output from the first measurement unit 13 of the surge signal detection unit 2 together with the specific detection signal St are associated with the time data Dt when the specific detection signal St is detected. The first main memory 32 stores the specific characteristic data regarding the maximum surge signal Ss2. In addition to the storage of the specific characteristic data, the processing unit 7 generates a surge signal (maximum surge signal) corresponding to the specific detection signal St in the first voltage data D1 stored in the first buffer memory 31. The first voltage data D1 of the specific period Tw including Ss2) is transferred to the first main memory 32 as the first specific voltage data D1s for the maximum surge signal Ss2, and stored in correspondence with the specific characteristic data. The processing unit 7 also reads out the number of detections N from the internal memory at each time point when the measurement of the measurement unit section Se3 is completed (the end of the measurement unit section Se3), and specifies time data Dt for specifying the measurement unit section Se3. (As the number of times of detection N in the measurement unit section Se3) and stored.

  In addition, when the processing unit 7 executes the first data storage process with the detection signal St stored as the maximum value Vpmax as the specific detection signal St in the measurement unit section Se3, the second data storage process is performed. Also execute. In the second data storage process, the processing unit 7 transfers (stores) the first voltage data D1 (first specific voltage data D1s) from the first buffer memory 31 to the first main memory 32 in the first data storage process. The effective value Ve input from the second measurement unit 23 is stored in the second main memory 42 in synchronization with the second voltage data D2 stored in the second buffer memory 41 as described above. Second voltage data D2 in a period (including this specific period Tw and longer than this specific period Tw) corresponding to the specific period Tw of the first voltage data D1 transferred to the first main memory 32 is the maximum surge signal Ss2. Is transferred to and stored in the second main memory 42 as the second specific voltage data D2s. Further, when storing the effective value Ve and the second specific voltage data D2s in the second main memory 42, the processing unit 7 stores the specific detection signal St in association with the time data Dt when it is detected.

  At this time, in the measurement unit section Se included in one surge occurrence period Ses (in this example, the surge occurrence period Ses1) as in the measurement unit sections Se2 and Se3, the processing unit 7 determines that the peak value Vp is the current maximum value. The peak value Vp (new maximum value Vpmax), the pulse width tp and the time data Dt, and the storage of the first specific voltage data D1s in the first main memory 32 for the surge signal Ss larger than Vpmax are updated. However, by storing only the latest value, the peak value Vp (that is, the maximum value Vpmax) for the specific surge signal Ss (maximum surge signal Ss) having the maximum peak value Vp over the measurement unit sections Se2 and Se3. , Only the pulse width tp and time data Dt, and the first specific voltage data D1s are stored. Further, the processing unit 7 also performs update storage of the first specific voltage data D1s and the like to the first main memory 32 for storing the effective value Ve and the second specific voltage data D2s in the second main memory 42. Each time the second specific voltage data D2s and the latest effective value Ve in the period (including the specific period Tw and longer than the specific period Tw) corresponding to the specific period Tw of the first specific voltage data D1s are updated. Run. Thereby, the effective value Ve and the second specific voltage data D2s also in the specific period Tw including the specific surge signal Ss (maximum surge signal Ss) having the maximum peak value Vp over the measurement unit sections Se2 and Se3. Only the effective value Ve and the second specific voltage data D2s are stored.

  Although not shown, the detection signal St is input (detected) in each measurement unit section Se3,... After the measurement unit section Se2 in which the first detection signal St is detected, but the measurement unit section Se until then is input. When the peak value Vp larger than the maximum value Vpmax specified in step S3 is not input, the processing unit 7 sets the specific characteristic data and the first value at each time point (end of the measurement unit interval Se) at which the measurement of the measurement unit interval Se is completed. The storage of the specific voltage data D1s in the first main memory 32 is not performed, and only the storage processing in the first main memory 32 for the detection number N and the time data Dt is executed.

  Next, the processing unit 7 performs the measurement of the next measurement unit section Se4 after the measurement of the measurement unit section Se3 is completed. In this example, as an example, a series of generation of the surge signal Ss in the surge generation period Ses1 is completed during the measurement of the measurement unit section Se3. Thereby, in this measurement unit section Se4, since the 1st measurement part 13 does not detect the surge signal Ss, it does not perform the output of the detection signal St, the peak value Vp, and the pulse width tp to the processing part 7. In this case, since the processing unit 7 does not detect the detection signal St in the detection process in the measurement unit section Se4, based on this (or based on the fact that the detection count N is zero), the measurement unit section Se4. The time data Dt when the measurement of the measurement unit section Se4 is started at each time point when the measurement is completed (end of the measurement unit section Se4), in other words, the end of the measurement unit section Se3 immediately before the measurement unit section Se4. Is stored in the first main memory 32 as time data Dt indicating the end of the surge occurrence period Ses1. Thereby, the measurement operation by the voltage measuring device 1 when one surge occurrence period Ses1 arrives is completed.

Thus, the following data (1-1) to (1-11) are stored in the first main memory 32 and the second main memory 42.
(1-1) Specific characteristic data (peak value Vp, pulse width tp, and time data Dt (surge generation period) for a specific surge signal Ss (first surge signal Ss1) corresponding to the first detection signal St in the surge generation period Ses1 Data indicating the start time of Ses))
(1-2) First specific voltage data D1s of a specific period Tw including the head surge signal Ss1
(1-3) Second specific voltage data D2s that is second voltage data D2 in a period corresponding to the specific period Tw of the first specific voltage data D1s
(1-4) Effective value Ve corresponding to the first detection signal St
(1-5) Number of detection times N of detection signal St in each measurement unit section Se
(1-6) Time data Dt for specifying each measurement unit section Se (time data Dt at the end of the measurement unit section Se in this example)
(1-7) Specific characteristic data (maximum value Vpmax, pulse width tp, and time data Dt) for a specific surge signal Ss (maximum surge signal Ss2) having the maximum peak value Vp in the surge generation period Ses1
(1-8) First specific voltage data D1s of a specific period Tw including the maximum surge signal Ss2
(1-9) Second specific voltage data D2s that is second voltage data D2 in a period corresponding to the specific period Tw of the first specific voltage data D1s
(1-10) Effective value Ve corresponding to maximum surge signal Ss2
(1-11) Time data Dt indicating the end of the surge occurrence period Ses1

  Then, as shown in FIG. 2, following the surge generation period Ses1, there is a surge generation period Ses in which the surge signal Ss is superimposed on the input signal Si (surge generation periods Ses2, Ses3,... Shown in FIG. 2). When they arrive sequentially, the voltage measuring device 1 operates in the same manner as in the surge generation period Ses1 described above.

Thus, the following data (2-1) to (2-11) are sequentially stored in the first main memory 32 and the second main memory 42 for each surge occurrence period Ses2, Ses3,. Is done.
(2-1) Specific characteristic data for the leading surge signal Ss1 (peak value Vp, pulse width tp, and time data Dt (data indicating the start time of the surge generation period Ses))
(2-2) First specific voltage data D1s of a specific period Tw including the head surge signal Ss1
(2-3) Second specific voltage data D2s which is the second voltage data D2 in the period corresponding to the specific period Tw of the first specific voltage data D1s
(2-4) Effective value Ve corresponding to the first detection signal St
(2-5) Number of detections N of the detection signal St in each measurement unit section Se
(2-6) Time data Dt for specifying each measurement unit section Se (time data Dt at the end of the measurement unit section Se)
(2-7) Specific characteristic data of maximum surge signal Ss2 (maximum value Vpmax, pulse width tp, and time data Dt)
(2-8) First specific voltage data D1s for a specific period Tw including the maximum surge signal Ss2
(2-9) Second specific voltage data D2s which is the second voltage data D2 in the period corresponding to the specific period Tw of the first specific voltage data D1s
(2-10) Effective value Ve corresponding to maximum surge signal Ss2
(2-11) Time data Dt indicating the end of the surge occurrence period Ses

When the processing unit 7 inputs a display instruction from the operation unit (not shown) during the above measurement operation or after the measurement operation is completed, the surge occurrence periods Ses1, Ses2, Ses3,. The first main memory 32 and the second main memory are arbitrary data (any or all of the data (3-1) to (3-11) shown below) in any surge occurrence period Ses The data is read from 42 and displayed on the display unit 8.
(3-1) Specific characteristic data of the leading surge signal Ss1 (peak value Vp, pulse width tp, and time data Dt (data indicating the start time of the surge occurrence period Ses))
(3-2) First specific voltage data D1s of a specific period Tw including the head surge signal Ss1
(3-3) Second specific voltage data D2s which is the second voltage data D2 in the period corresponding to the specific period Tw of the first specific voltage data D1s
(3-4) Effective value Ve corresponding to first detection signal St
(3-5) Number of detections N of detection signal St in each measurement unit section Se
(3-6) Time data Dt for specifying each measurement unit section Se (time data Dt at the end of the measurement unit section Se)
(3-7) Specific characteristic data of maximum surge signal Ss2 (maximum value Vpmax, pulse width tp, and time data Dt)
(3-8) First specific voltage data D1s of a specific period Tw including the maximum surge signal Ss2
(3-9) Second specific voltage data D2s which is the second voltage data D2 in the period corresponding to the specific period Tw of the first specific voltage data D1s
(3-10) Effective value Ve corresponding to maximum surge signal Ss2
(3-11) Time data Dt indicating the end of the surge occurrence period Ses

  For example, when a display instruction for a waveform related to the head surge signal Ss1 in the second surge occurrence period Ses2 is input, the processing unit 7 receives the first specific voltage data D1s of the specific period Tw including the head surge signal Ss1 for the first time. While reading from the 1 main memory 32, the 2nd specific voltage data D2s in the period corresponding to this specific period Tw are read from the 2nd main memory 42, and are displayed on the display part 8. FIG. Thereby, the display unit 8 has a waveform of the input signal Si including the head surge signal Ss1 in the second surge occurrence period Ses2 and a waveform without the surge (not including the surge signal Ss) regarding the input signal Si. Is displayed.

  Thus, in this voltage measuring device 1, the processing unit 7 uses the time data Dt indicating the start and end of each surge occurrence period Ses and the input signal Si representing the state of the surge signal Ss in each surge occurrence period Ses. The first specific voltage data D1s and the specific characteristic data (peak value Vp, pulse width tp, and time data Dt indicating the generation time) of the first surge voltage Ss1 for the waveform of the specific period Tw including the head surge signal Ss1, and the occurrence of each surge The first specific voltage data D1s and the specific characteristic data of the maximum surge signal Ss2 (peak value Vp (surge occurrence) regarding the waveform of the specific period Tw including the maximum surge signal Ss2 in the input signal Si representing the state of the surge signal Ss in the period Ses Time value D indicating the maximum value Vpmax in the period Ses), the pulse width tp, and the generation time ) And stores the first main memory 32.

  Therefore, according to this voltage measuring apparatus 1, for all detected surge signals Ss, the waveform data of the specific period Tw including the surge signal Ss in the input signal Si and the specific characteristic data of the surge signal Ss are stored. Unlike the voltage measurement device of FIG. 5, each measurement unit in each surge generation period Ses is obtained even when the generation factor of the surge signal Ss is generated continuously (that is, when the surge generation period Ses is generated continuously). Since the number (frequency) of data transfer from the first buffer memory 31 to the first main memory 32 in the section Se can be reduced, it is expensive to transfer and store a large amount of data in the memory in a short time Unnecessary hardware can be eliminated.

Further, according to the voltage measuring apparatus 1, the first specific voltage data D1s and the top of the upper Symbol waveform of a specific time period Tw including the head surge signal Ss1 for of all the data and the characteristic data for the waveform of a surge signal Ss Specific characteristic data of the surge signal Ss1 and the maximum surge signal Ss2 necessary for specifying the characteristic of the surge signal Ss (specifically, maximum power: defined by the peak value Vp and the pulse width tp) are included. Unlike the conventional voltage measuring device described above, the waveform data is stored in the first main memory 32 because only the first specific voltage data D1s and the specific characteristic data of the maximum surge signal Ss2 for the waveform of the specific period Tw are stored in the first main memory 32. Since the memory capacity of the first main memory 32 to be stored can be reduced, the device cost can be reduced. Furthermore, according to the voltage measuring apparatus 1, even if the measurement time of the surge signal Ss for the input signal Si is long, the data collection operation performed after the measurement and the generation period of the surge signal Ss (surge occurrence) The specific work on the characteristics of the start and end of the period and the surge signal Ss (maximum surge signal Ss2) can be greatly simplified, and the time required for the work can be greatly shortened.

  Further, in the voltage measuring apparatus 1, the processing unit 7 counts the number of detections (occurrence number) N of the detection signal St in each measurement unit section Se in the surge generation period Ses, and specifies each measurement unit section Se. The time data Dt (in the above example, the time data Dt at the end of the measurement unit section Se) is stored in the second main memory 42 in association with it. Therefore, according to this voltage measuring apparatus 1, based on the number of times of detection N, the detailed generation state of the surge signal Ss in each surge generation period Ses (for example, at which point in the surge generation period Ses the surge signal Ss is more Can be measured).

  In the voltage measuring apparatus 1, the processing unit 7 inputs the second voltage data D 2 from the second measuring unit 23 and stores the second voltage data D 2 in the second buffer memory 41 using the FIFO method. In synchronization with the transfer (storage) of the first voltage data D1 (first specific voltage data D1s) to the memory 32, the effective value Ve measured by the second measurement unit 23 is stored in the second main memory 42, and the first The period corresponding to the specific period Tw of the first voltage data D1 (first specific voltage data D1s) of the second voltage data D2 stored in the two-buffer memory 41 (including this specific period Tw, this specific period Tw The second voltage data D2 (second specific voltage data D2s) for a longer period) is transferred to the second main memory 42 and stored therein.

  Therefore, according to the voltage measuring apparatus 1, the second specific voltage data D2s for the waveform not including the surge signal Ss of the input signal Si in the period corresponding to the specific period Tw including the leading surge signal Ss1 in the input signal Si and The second specific voltage data D2s for the waveform not including the surge signal Ss of the input signal Si in the period corresponding to the specific period Tw including the maximum surge signal Ss2 in the input signal Si is stored in the second main memory 42. Therefore, the surge signal Ss of the input signal Si is reduced while reducing the number (frequency) of data transfer from the second buffer memory 41 to the second main memory 42 and reducing the memory capacity of the second main memory 42. It is possible to measure the waveform of the surge signal Ss (the waveform of the input signal Si including the surge signal Ss) in comparison with the waveform not included. Kill.

  Further, according to the voltage measuring apparatus 1, the processing unit 7 calculates the effective value Ve measured by the second measuring unit 23 based on the second voltage data D2 indicating the waveform of the input signal Si not including the surge signal Ss. Since it is stored in the second main memory 42 together with the second specific voltage data D2s, the effective value Ve in each surge occurrence period Ses can also be measured.

  In the voltage measuring apparatus 1 described above, as a preferred embodiment, the parameter measuring unit 3 is provided, and a configuration for measuring the waveform and electrical parameters of the fundamental wave of the input signal Si is adopted. 3 may be omitted, and only the surge signal detection unit 2 may be configured.

  Further, the voltage measuring device 1 described above can measure the detailed generation state of the surge signal Ss in each surge generation period Ses (at which point in the surge generation period Ses the surge signal Ss is generated more). For this reason, a preferred configuration for measuring the number of detections N of the detection signal St detected in each measurement unit section Se of the surge generation period Ses is adopted, but the generation of the surge signal Ss through the period in each surge generation period Ses is adopted. When the situation (how much the surge signal Ss is generated in the surge generation period Ses) may be measured, instead of the configuration in which the number of detections N is measured in each measurement unit section Se, the entire surge generation period Ses is measured. The number of detections N of the detection signal St is measured for each surge occurrence period Ses, and corresponding to the surge occurrence period Ses (one example and Te, it is also possible to employ a configuration in which time data Dt in correspondence with (time data identifying a surge period Ses)) stored which indicates the beginning of surge period Ses. Furthermore, when the necessity of measuring the surge occurrence state (how much has occurred) in each surge occurrence period Ses is low or not necessary, a configuration in which the number of detection times N is omitted can be adopted. .

Further, in the voltage measuring apparatus 1 described above, in order to specify both the generation period of the surge signal Ss and the characteristic (maximum power) of the surge signal Ss, each first specific voltage data for the head surge signal Ss1 and the maximum surge signal Ss2 is specified. D1s and each specific characteristic data are stored in the first main memory 32. When only the generation period of the surge signal Ss needs to be specified, the waveform of the specific period Tw including the head surge signal Ss1 is used. It is also possible to adopt a configuration in which the first specific voltage data D1s and the specific characteristic data of the head surge signal Ss1 are measured and stored.

  In the above example, the second data storage process is executed in synchronization with the transfer of the first voltage data D1 from the first buffer memory 31 to the first main memory 32 in the first data storage process. However, it is also possible to employ a configuration that is executed at the end of the surge generation period Ses.

DESCRIPTION OF SYMBOLS 1 Voltage measurement apparatus 2 Surge signal detection part 3 Parameter measurement part 4 Clock part 5 1st memory | storage part 6 2nd memory | storage part 7 Processing part 11 1st A / D conversion part 13 1st measurement part 31 1st buffer memory 32 1st main Memory 41 Second buffer memory 42 Second main memory D1 First voltage data Dt Time data Se Measurement unit section Ses Surge generation period Ss Surge signal St Detection signal tp Pulse width Tw Specific period Ve Effective voltage Vp Peak value

Claims (5)

A first A / D converter that samples the input signal, converts it to first voltage data indicating the voltage of the input signal, and outputs the first voltage data;
A clock unit that generates and outputs time data indicating the current time;
A first storage unit comprising a first buffer memory and a first main memory;
A first measurement unit that measures a peak value of the surge signal included in the input signal and a pulse width of the surge signal based on the first voltage data, and outputs the measured value together with a detection signal indicating detection of the surge signal; ,
A first storage process for inputting the first voltage data and storing the first voltage data in the first buffer memory; an interval measurement process for measuring a predetermined measurement unit interval in a time longer than a sampling period of the first A / D converter; A detection process for detecting the detection signal output from the first measurement unit for each measurement unit section, and a specific detection signal among the detection signals detected by the detection process from the first measurement unit. The peak value and the pulse width that are output are associated with the time data when the specific detection signal is detected, and the specific characteristic data for the specific surge signal corresponding to the specific detection signal is the first characteristic data. A specification including the specific surge signal of the first voltage data stored in the first buffer memory and stored in the main memory The first voltage data between a first specific voltage first data storage processing executable configured processing unit to be stored in the first main memory as the data for that particular surge signal,
While the processing unit continuously executes the first storage process, the section measurement process, and the detection process,
When the detection signal is detected in the measurement unit interval next to the measurement unit interval in which the detection signal is not detected, only the first detection signal in the next measurement unit interval is used as the specific detection signal. The data storage process is executed, and the peak value and the pulse width output from the first measurement unit together with the specific detection signal are detected when the specific detection signal indicating the start of a surge occurrence period is detected. Corresponding to time data, the specific characteristic data for the leading surge signal is stored in the first main memory and includes the leading surge signal in the first voltage data stored in the first buffer memory. The first voltage data for the specific period is stored in the first main memory as the first specific voltage data for the head surge signal. Then,
When the detection signal is not detected in the measurement unit section next to the measurement unit section in which the detection signal is detected, the time data when the next measurement unit section is started is used as the end of the surge generation period. A voltage measuring device which is stored in the first main memory as time data to be shown. A first A / D converter that samples the input signal, converts it to first voltage data indicating the voltage of the input signal, and outputs the first voltage data;
A clock unit that generates and outputs time data indicating the current time;
A first storage unit comprising a first buffer memory and a first main memory;
A first measurement unit that measures a peak value of the surge signal included in the input signal and a pulse width of the surge signal based on the first voltage data, and outputs the measured value together with a detection signal indicating detection of the surge signal; ,
A first storage process for inputting the first voltage data and storing the first voltage data in the first buffer memory; an interval measurement process for measuring a predetermined measurement unit interval in a time longer than a sampling period of the first A / D converter; A detection process for detecting the detection signal output from the first measurement unit for each measurement unit section; a detection signal output from the first measurement unit together with a specific detection signal among the detection signals detected by the detection process The first peak value and the pulse width that have been made correspond to the time data when the specific detection signal is detected, as specific characteristic data for the specific surge signal corresponding to the specific detection signal. And storing in the main memory and for a specific period including the specific surge signal in the first voltage data stored in the first buffer memory. A first data storage process for storing the first voltage data in the first main memory as first specific voltage data for the specific surge signal, and the first measurement unit together with the detection signal detected by the detection process A processing unit configured to be able to execute a maximum value specifying process for specifying the maximum value of the peak value output from,
While the processing unit continuously executes the first storage process, the section measurement process, and the detection process,
When the detection signal is first detected in the measurement unit interval next to the measurement unit interval in which the detection signal is not detected, and each of the measurement unit interval and the measurement unit interval after the detection unit interval is first detected. When the maximum value is specified by executing the maximum value specifying process over the measurement unit section, only the detection signal that is first detected and the peak value is specified as the maximum value. The first data storage process is performed as the specific detection signal, and the peak value and the pulse width output from the first measurement unit together with the specific detection signal are detected with respect to the first detection signal detected Corresponds to the time data when the specific detection signal indicating the start of the surge occurrence period is detected, and the specific characteristic data for the leading surge signal. As for the detection signal with the peak value specified as the maximum value, the first main characteristic data as the specific characteristic data for the maximum surge signal is associated with the time data when the specific detection signal is detected. The first voltage data of the specific period including the head surge signal of the first voltage data stored in the first buffer memory and stored in the first buffer memory is stored in the first buffer memory. As the specific voltage data, the first voltage data of the specific period including the maximum surge signal of the first voltage data is stored in the first main memory as the first specific voltage data of the maximum surge signal. Remember,
When the detection signal is not detected in the measurement unit section next to the measurement unit section in which the detection signal is detected, the time data when the next measurement unit section is started is used as the end of the surge generation period. A voltage measuring device which is stored in the first main memory as time data to be shown.   The processing unit executes a counting process for counting the number of occurrences of the detection signal in the surge occurrence period, and stores the counted occurrence number in the first main memory in correspondence with the corresponding surge occurrence period. The voltage measuring device according to claim 1 or 2.   The processing unit counts the number of occurrences in each measurement unit section in the surge occurrence period as the counting process, and sets the number of occurrences corresponding to the time data specifying the corresponding measurement unit section. The voltage measuring device according to claim 3, wherein the voltage measuring device is stored in the first main memory. A low-pass filter that inputs the input signal and outputs it as an output signal;
A second A / D converter that samples the output signal at a sampling period longer than that of the first A / D converter, converts the output signal into second voltage data indicating an instantaneous value of the output signal, and outputs the second voltage data;
A second storage unit comprising a second buffer memory and a second main memory;
A second measuring unit that measures and outputs an electrical parameter of the output signal based on the second voltage data;
The processing unit receives the second voltage data and stores the second voltage data in the second buffer memory, and the first buffer memory to the first main memory in the first data storage process. In synchronization with the storage of one voltage data, the measured electrical parameter is stored in the second main memory, and the second voltage data stored in the second buffer memory is stored for the specific surge signal. 5. The voltage measuring device according to claim 1, wherein a second data storage process for storing the second specific voltage data in the second main memory is executed.

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