JP2014053162A - Breaker operation state determination apparatus and breaker operation state determination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for accomplishing a determination apparatus capable of easily determining an operation state of a breaker.SOLUTION: A breaker operation state determination apparatus 1 determines an operation state of a breaker 100 on the basis of a signal of vibration acceleration, in a turning-on operation of the breaker 100, measured by an acceleration sensor 10 mounted to the breaker 100. Namely, in a filter unit 20, a measurement signal of the acceleration sensor 10 is converted into a waveform abstract signal by a BPF 21 and an effective value conversion circuit 22 and further converted into a binary signal by a comparator 23. Next, a determination unit 30 compares the binary signal with a reference binary signal corresponding to a binary signal in normal operation and determines abnormality/normality of the breaker 100 in accordance with whether a differential cumulative value that is a total number of locations where both the signals are not matched, is equal to or more than a predetermined abnormality determination value.

Description

  The present invention relates to an apparatus for determining an operating state of a circuit breaker.

  In the substation, a circuit breaker is provided for the purpose of preventing abnormal current from flowing to various devices. For example, a circuit breaker used in an electric railway substation has a higher operation frequency than a circuit breaker used by a power generation company or a power transmission company, and therefore has a high frequency of maintenance patrols and inspections. What is important in maintenance and inspection is the determination of the operating status of the circuit breaker. As one of techniques for determining the operation status of a circuit breaker, a technique of Patent Document 1 is known in which the operation status is determined by measuring vibration generated when the circuit breaker is turned on. According to the technique of Patent Document 1, a vibration sensor is attached to a circuit breaker (switching device), and a pulse is detected by passing a high-pass filter from a vibration acceleration signal measured by the vibration sensor. Based on the time delay from the start of the operation command determined from the operation command current to the detection of this pulse, the circuit breaker is determined to be abnormal / normal compared to the time delay during normal operation. .

JP-A-62-2361978

  The technique for measuring the vibration generated in the circuit breaker and determining the operation state has the following problems. First, the control voltage (also referred to as the rated control voltage) of the circuit breaker for which the operation is guaranteed is not constant and has a width of about 85 to 110 V. If the control voltage is different, the amplitude and timing of vibration change, and the vibration sensor The measurement signal measured in is different. Incidentally, the reason why the range of the control voltage is wide is that the operating power of the circuit breaker can be supplied from the battery in consideration of the power failure, and the output voltage of the battery is not constant.

  In addition, the vibration generated in the circuit breaker is affected by various natural frequencies such as a housing and an installation member, and various frequency components are mixed. For this reason, the measurement signal obtained by the vibration sensor differs depending on the model, as well as the measurement signal obtained by the vibration sensor due to the influence of the installation location, construction method, etc. even if the model is the same. Furthermore, the difference in the natural frequency makes it difficult to remove the noise component. In addition, when the operation state is determined from the signal that has passed through the high-pass filter as in the technique of Patent Document 1, the noise component also passes through the high-pass filter. Therefore, the distinction becomes more difficult. Since the difficulty exists for each control voltage described above, it is necessary to appropriately remove the vibration component at the center and other noise components according to each control voltage.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique for realizing a new determination device that can easily determine an operation state of a circuit breaker. The second object is to provide a technique capable of ensuring the accuracy of determination while being a simple determination method.

The first invention for solving the above-described problems is
A sensor (for example, acceleration sensor 10 in FIG. 2) that measures vibration during operation of the circuit breaker to be determined;
Waveform summary signal generating means for generating a waveform summary signal representing a characteristic of amplitude change of the measurement signal from the measurement signal of the sensor by performing at least signal processing of effective value calculation, envelope detection, or moving average. For example, the BPF 21 and the effective value conversion circuit 22) of FIG.
Binarization means (for example, the comparator 23 in FIG. 2) for comparing the waveform summary signal with a given set value and converting it to a binarized signal;
A determination unit that compares the binarized signal with a reference binarized signal obtained from the measurement signal when the circuit breaker operates in a normal state in advance to determine the operating state of the circuit breaker (for example, FIG. 2). Determination unit 30),
The circuit breaker operation status determination device (for example, the circuit breaker operation status determination device 1 in FIG. 2).

As another invention,
At least signal processing of effective value calculation, envelope detection or moving average is performed on the measurement signal of vibration during operation of the circuit breaker to be determined, measured by the sensor, and the amplitude change of the measurement signal is measured. Generating a waveform summary signal representing the feature;
A conversion step of comparing the waveform summary signal with a given set value to convert it to a binary signal;
A determination step of comparing the binarized signal with a reference binarized signal obtained from the measurement signal when the circuit breaker operates in advance in a normal state to determine an operation state of the circuit breaker;
A circuit breaker operating condition determination method including the above may be configured.

  According to the first aspect of the invention, instead of determining the operation status based on the measurement signal itself of the sensor, a waveform outline signal representing the characteristics of the amplitude change of the measurement signal is generated, and this waveform outline signal is The operation state is determined by comparing the binarized binarized signal with the reference binarized signal. Thereby, the influence of the error which arises by the difference in the noise component contained in a measurement signal and the natural frequency component of a housing | casing can be reduced, and it becomes possible to determine the operating condition of a circuit breaker easily.

As a second invention, the circuit breaker operation status determination device of the first invention,
The determination means compares the binarized signal and the reference binarized signal in time series, and when the evaluation value based on a different location satisfies a predetermined abnormal condition, the circuit breaker is abnormal. judge,
You may comprise the circuit breaker operation condition determination apparatus.

  According to the second aspect of the present invention, when the operation status of the circuit breaker is determined, the binarized signal and the reference binarized signal are compared in time series, and the evaluation value based on the different part satisfies the abnormal condition. The circuit breaker is determined to be abnormal.

As a third invention, the circuit breaker operation status determination device of the second invention,
The determination unit includes a unit that calculates the evaluation value using a coefficient for each comparison portion that is predetermined in the reference binarization signal.
You may comprise the circuit breaker operation condition determination apparatus.

  According to the third aspect of the invention, the evaluation value is calculated using the coefficient at the comparison portion that is predetermined for the reference binarized signal. Thereby, light weight specific gravity can be attached to a comparison location.

As 4th invention, it is the circuit breaker operation condition judging device of the invention in any one of 1st-3rd,
The waveform outline signal generation means includes a filter that removes components other than a predetermined frequency band component included in the measurement signal, and performs signal processing for performing an effective value calculation on the signal after passing through the filter, Generate a waveform summary signal,
You may comprise the circuit breaker operation condition determination apparatus.

  According to the fourth aspect of the invention, the waveform outline signal is generated by performing signal processing for calculating an effective value after passing through a filter that removes components other than the predetermined frequency band component included in the measurement signal. . Therefore, a high-frequency noise component that is not necessary for the determination of the circuit breaker operating condition is removed, and the waveform outline signal is generated.

As 5th invention, it is the circuit breaker operation condition judging device of the invention in any one of 1st-4th,
Input means for inputting a control voltage from the circuit breaker;
Changing means for changing at least one of the settling value and the reference binarized signal to a predetermined value associated with the control voltage;
You may comprise the circuit breaker operation condition determination apparatus provided with.

  According to the fifth aspect, at least one of the settling value and the reference binarized signal is changed to a predetermined value associated with the control voltage of the circuit breaker. If the control voltage of the circuit breaker is different, the measurement signal may be different even when it is normal, and the generated binary signal may be different. For this reason, for example, a reference binarization signal is determined in advance for each control voltage, and compared with a reference binarization signal corresponding to the current control voltage, thereby improving the accuracy of determining the operation status of the circuit breaker. It becomes possible to make it.

The block diagram of the circuit breaker operation condition determination apparatus. The example of a waveform of the measurement signal by an acceleration sensor. Explanatory drawing of the setting of the center frequency of BPF. Waveform example of waveform summary signal. Waveform example of binarized signal. Explanatory drawing of the determination of the operation condition based on a binarization signal. The flowchart explaining operation | movement of the circuit breaker operation condition determination apparatus. The figure for demonstrating the modification of calculation of a difference accumulation value. The figure for demonstrating the modification of a filter unit and a process part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the applicable embodiment of the present invention is not limited to this.

[Constitution]
FIG. 1 is a configuration diagram of a circuit breaker operation status determination device 1. The circuit breaker operation status determination device 1 attaches the acceleration sensor 10 to the circuit breaker 100 to be determined, and determines the operation status of the circuit breaker 100 based on the vibration acceleration measured by the acceleration sensor 10. A control voltage is input from the circuit breaker 100.

  The circuit breaker operation status determination device 1 includes an acceleration sensor 10 and a main body device 13 having a filter unit 20 and a determination unit 30 as main functional units.

  The acceleration sensor 10 is a sensor for measuring vibration during operation of the circuit breaker 100, and is attached to the determination target circuit breaker 100 to measure vibration acceleration. Note that a displacement sensor may be used instead of an acceleration sensor as long as it is a vibration sensor that measures vibration (amplitude change) over time.

  FIG. 2 is a signal waveform example of vibration acceleration measured by the acceleration sensor 10. In FIG. 2, the horizontal axis represents time t, and the vertical axis represents vibration acceleration. The time t = 0 is the time when the state of the auxiliary contact of the circuit breaker 100 changes (in this example, the time when the auxiliary contact is turned on with the circuit breaker closing operation). The signal waveform of the vibration acceleration differs depending on the control voltage of the circuit breaker 100. FIG. 2 shows the case where the control voltage of the circuit breaker 100 is 90V and 110V, respectively.

  The filter unit 20 includes a BPF (Band Pass Filter) 21, an effective value conversion circuit 22, and a comparator 23, and an amplitude change of the signal from a vibration acceleration signal (measurement signal) input from the acceleration sensor 10. It is a circuit that generates a waveform outline signal representing the characteristics of the above and outputs a binarized signal as a result of comparison with a predetermined settling value, and can be said to be a circuit that performs a kind of filter processing.

  The BPF 21 passes a signal in a predetermined band with respect to the vibration acceleration signal input from the acceleration sensor 10 and blocks out-of-band frequency components. However, in order to remove at least a noise component included in the vibration acceleration signal, the BPF 21 selects a band that cuts off the high frequency band.

  The effective value conversion circuit 22 converts the output signal from the BPF 21 into an effective value. The output signal of the effective value conversion circuit 22 becomes a waveform outline signal representing the characteristic of the amplitude change of the vibration acceleration signal measured by the acceleration sensor 10.

  Here, a method for setting the passband (center frequency) of the BPF 21 will be described. FIG. 3 is an example of an output signal (waveform summary signal) from the effective value conversion circuit 22 with the horizontal axis representing time t and the vertical axis representing the output signal level of the effective value conversion circuit 22. The waveform outline signal is shown when the center frequency (passband) of the BPF 21 is 3200 Hz and 12000 Hz, respectively, for the same vibration acceleration signal. If the waveform summary signal is not at a certain level, the binarized signal by the comparator 23 at the subsequent stage does not become a significant signal. Therefore, in the example of FIG. 3, it can be said that the center frequency of the BPF 21 is more appropriate at 3200 Hz than at 12000 Hz. Based on the above characteristics, the pass band of the BPF 21 is preset.

  FIG. 4 is a waveform example of an output signal (waveform summary signal) of the effective value conversion circuit 22, where the horizontal axis represents time t and the vertical axis represents the output signal level of the effective value conversion circuit 22. The waveform of FIG. 4 has shown the waveform outline signal about the two types of vibration acceleration signals shown in FIG. 2, and has shown the case where the control voltage of the circuit breaker 100 is 90V and 110V, respectively. Both passbands (center frequencies) of the BPF 21 are 3200 Hz. As apparent from FIG. 4, the vibration acceleration signal differs depending on the control voltage of the circuit breaker 100, so that the obtained waveform outline signal also has a different waveform (a waveform with different time and amplitude in which the waveform appears). Therefore, in this embodiment, as described later, the settling value and the reference binarization signal are changed according to the control voltage. The signal level “Vs” in FIG. 4 is the set value Vs.

  The comparator 23 binarizes the signal level of the waveform outline signal input from the effective value conversion circuit 22 with the “settling value” input from the determination unit 30. Specifically, “H (1)” is output if the signal level of the waveform outline signal is equal to or higher than the set value, and “L (0)” is output if it is less than the set value.

  FIG. 5 is an example of the output signal (binarized signal) of the comparator 23, where the horizontal axis represents time t and the vertical axis represents the output signal level of the comparator 23. 5 is a binarized signal obtained by binarizing the two types of waveform outline signals shown in FIG. 4 based on the set value Vs in FIG. 4, and the control voltage of the circuit breaker 100 is 90V and 110V. Each case is shown. Since the waveform outline signal differs depending on the control voltage of the circuit breaker 100 as shown in FIG. 4, the obtained binarized signal also has a different waveform as shown in FIG.

  Returning to FIG. 1, the determination unit 30 includes an operation input unit 310, a processing unit 330, a display unit 320, and a storage unit 340, and refers to the control voltage input from the circuit breaker 100. The determination process for the binarized signal input from 20 is performed to determine whether or not the breaker 100 is abnormal.

  The operation input unit 310 is an input device realized by, for example, a keyboard, mouse, touch panel, button switch, various sensors, and the like, and outputs an input signal corresponding to the operation input to the processing unit 330. The display unit 320 is a display device realized by, for example, an LCD or the like, and performs display according to a display signal from the processing unit 330.

  The processing unit 330 is realized by a processor such as a CPU (Central Processing Unit), for example, and each unit configuring the determination unit 30 based on an input signal from the operation input unit 310, a program or data stored in the storage unit 340, or the like. A determination process for determining an operation abnormality of the circuit breaker 100 to be determined is performed based on the binarized signal input from the filter unit 20.

  Prior to the determination process, the processing unit 330 selects a set value corresponding to the control voltage input from the circuit breaker 100 from the set value data 342 and outputs the set value to the comparator 23. The settling value may be made constant regardless of the control voltage.

  In the determination process, the operation state of the circuit breaker 100 is determined by comparing the binarized signal input from the filter unit 20 with a predetermined binarized signal. Specifically, the binarized signal and the reference binarized signal are sampled at a predetermined sampling interval in time series to determine whether or not both values match. Add "1". If the accumulated difference value is equal to or greater than the abnormality determination value, the operation of the circuit breaker 100 to be determined is determined to be “abnormal”. The accumulated difference value is a kind of evaluation value.

  Here, the reference binarization signal is a binarization signal obtained by filtering the vibration acceleration data measured by the acceleration sensor 10 when the operation of the circuit breaker 100 is “normal” by the filter unit 20, It is determined in advance in the reference binarized signal table 343. As described above, when the control voltage of the circuit breaker 100 is different, since the vibration acceleration signal measured by the acceleration sensor 10 is different, the binarized signal output from the filter unit 20 is different. For this reason, the reference binarization signal is prepared for each control voltage of the circuit breaker 100 and stored in the reference binarization signal table 343.

  Then, the processing unit 330 selects a reference binarization signal corresponding to the control voltage of the circuit breaker 100 to be determined, and the selected reference binarization signal and the binarization signal input from the filter unit 20 It is judged whether or not. Although the control voltage data is input by connecting the signal line to the circuit breaker 100, for example, the operator may input the control voltage from the operation input unit 310.

  In addition, the abnormality determination value is stored in the abnormality determination condition data 344, and the difference accumulation value is updated and stored as needed in the determination process as difference accumulation value data 345.

  FIG. 6 is a diagram for explaining an example of determination in the determination unit 30. FIG. 6A shows an example of a binarized signal input from the filter unit 20 and a reference binarized signal. In FIG. 6A, the binarized signal input from the filter unit 20 is a signal that simulates “abnormality” of the circuit breaker 100. FIG. 6 (b) shows the accumulated difference value obtained from FIG. 6 (a). It can be seen that the accumulated difference value gradually increases during the period in which the binarized signal and the reference binarized signal are different.

  The storage unit 340 stores a system program for realizing various functions for the processing unit 330 to control the determination unit 30 in an integrated manner, and a program and data for executing the determination process of the present embodiment. At the same time, it is used as a work area of the processing unit 330, and temporarily stores calculation results executed by the processing unit 330 according to various programs and input data from the operation input unit 310. In the present embodiment, the storage unit 340 stores a determination program 341, settling value data 342, a reference binarized signal table 343, abnormality determination condition data 344, and difference accumulated value data 345.

[Process flow]
FIG. 7 is a flowchart for explaining the operation of the circuit breaker operation status determination device 1. First, the closing operation of the circuit breaker 100 to be determined is performed (step A1). Then, the vibration acceleration signal when the closing operation is performed is input from the acceleration sensor 10 to the filter unit 20 (step A3), and a determination target period for the vibration acceleration signal is set (step A5). Here, the determination target period is a period from a predetermined timing before the start of the closing operation of the circuit breaker 100 to a lapse of a predetermined time after the input, and the start / end time of the closing operation is a control input from the circuit breaker 100, for example. It can be judged from the current.

  Next, the filter processing by the filter unit 20 is performed on the vibration acceleration signal within the set determination target period to generate a binarized signal (step A7). At this time, the processing unit 330 selects a set value corresponding to the control voltage of the circuit breaker 100 from the set value data 342 and outputs it to the comparator 23.

  Subsequently, a determination process by the determination unit 30 is performed on the generated binarized signal. That is, the processing unit 330 selects a reference binarized signal corresponding to the control voltage of the circuit breaker 100 from the reference binarized signal table 343 (step A9).

  Next, the binarized signal input from the filter unit 20 is sampled at a predetermined sampling interval (step A11), and the processes of steps A13 to A17 are performed for each sampling point. That is, it is determined whether or not the binarized signal matches the value at the sampling point in the selected reference binarized signal table 343 (step A13). If the result of determination is mismatch (step A15: YES), "1" is added to the difference accumulated value (step A17). By performing this for all sampling points, the binarized signal and the selected reference binarized signal are sequentially compared in time series to calculate a difference accumulated value that is an accumulated value of a different portion.

  Subsequently, the calculated difference accumulation value is compared with the accumulated abnormality determination value. If the difference accumulation value is less than the abnormality determination value (step A19: YES), the circuit breaker 100 is determined to be “normal” (step A21). If it is not less than the determination value (step A19: NO), the circuit breaker 100 is determined to be “abnormal” (step A23). Thereafter, the determination result (abnormal / normal) is output to the outside of the apparatus, for example, by displaying it on the display unit 320 (step A25). The determination operation in the circuit breaker operation status determination device 1 is performed in this way.

[Experimental result]
Using the circuit breaker operation status determination device 1 of the present embodiment, the status of a closing operation of a circuit breaker was determined. Since the circuit breaker was a normal circuit breaker, an abnormal measurement signal (vibration acceleration signal) was realized by adding a weight to the conductor part of the circuit breaker and changing the natural frequency. First, a measurement signal (vibration acceleration signal) measured when the circuit breaker was operated in a normal state was processed by the filter unit 20, and the obtained binarized signal was used as a reference binarized signal. Similarly, the measurement signal in the abnormal state is processed by the filter unit 20, and the accumulated difference value calculated by the determination unit 30 based on the previous reference binarized signal is confirmed for the obtained binarized signal. This was done three times. As a result, the difference accumulated value related to the first measurement is “140”, the second is “146”, and the third is “139”. Although it was performed three times, a stable value was obtained.

  On the other hand, until the waveform outline signal is generated from each measurement signal (vibration acceleration signal) obtained by operating the circuit breaker three times, the filter unit 20 performs simulation of the waveform outline signal and the abnormality. The cumulative value of the square of the residual with the signal waveform outline signal was obtained. The process of obtaining the cumulative value of the residual square is a general method for signal comparison. Further, the sampling time interval for obtaining the residual is the same as in the experiment using the previous circuit breaker operating condition determination device 1. As a result, the first cumulative value was “0.877”, the second was “0.206”, and the third was “0.143”. Although it was performed three times, there was a variation in each value, and it was confirmed that the operation status of the circuit breaker could not be correctly determined by a general method of signal comparison.

[Function and effect]
As described above, the circuit breaker operation status determination device 1 according to the present embodiment is configured such that the filter unit 20 uses a binary value for the vibration acceleration signal during the closing operation of the circuit breaker 100 measured by the acceleration sensor attached to the circuit breaker 100. The determination unit 30 compares the binarized signal with a reference binarized signal corresponding to the binarized signal during normal operation, and the difference accumulation is the total number of points where the two do not match The abnormality / normality of the circuit breaker 100 is determined depending on whether the value satisfies a predetermined abnormality condition.

  In this way, the waveform outline signal representing the characteristic of the amplitude change of the measurement signal is generated instead of the measurement signal itself of the acceleration sensor 10, and further, the binarized signal obtained by binarizing the waveform outline signal is converted into a reference binarization. By comparing with the signal, it is possible to reduce the influence of the error caused by the noise component included in the measurement signal and the natural frequency component of the housing, and it is possible to easily determine the operation state of the circuit breaker 100. . Also, if the control voltage of the circuit breaker 100 is different, the binary signal output from the filter unit 20 may be different because the measurement signal from the acceleration sensor 10 is different. For this reason, it is possible to secure and improve the accuracy of the determination of the operation state by setting the reference binarization signal for each control voltage.

[Modification]
It should be noted that embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.

(A) Calculation of accumulated difference value For example, the accumulated difference value, which is an evaluation value, may be calculated by weighting according to the comparison part. Specifically, in the above-described embodiment, “1” is uniformly added to the difference accumulated value at a predetermined sampling time interval for a mismatched portion where the binarized signal and the reference binarized signal do not match. However, for example, at a location where a more characteristic waveform shape is obtained, a value of “2” or more is added to the accumulated difference value. Specifically, as shown in FIG. 8, a coefficient k is set according to the timing for comparison determination. Then, for the mismatched portion, a value obtained by multiplying the unit value “1” of the cumulative difference value by the coefficient k corresponding to the mismatched portion is added as the cumulative difference value.

(B) Filter processing (signal processing)
In the above-described embodiment, the filter processing (signal processing) for the measurement value by the acceleration sensor 10 is extraction of a predetermined frequency component by the BPF 21 and effective value conversion by the effective value conversion circuit 22, but the amplitude of the measurement signal Any other signal processing such as envelope detection or moving average may be used.

(C) Number of BPFs 21 In the above-described embodiment, the filter unit 20 has been described as having one BPF 21, but may have a plurality of BPFs 21 each having a different pass band. Specifically, as shown in FIG. 9, the filter unit 20 includes a plurality of BPFs 21 a, 21 b,... Having different pass bands, and effective value conversion circuits 22 a, corresponding to the BPFs 21 a, 21 b,. .., A selection circuit 24, and a comparator 23. The same vibration acceleration signal (measurement signal) from the acceleration sensor 10 is input to each of the BPFs 21a, 21b,. The selection circuit 24 selects a signal having a high signal level from among the waveform outline signals input from the effective value conversion circuits 22a, 22b,... And outputs it to the comparator 23, and which signal has been selected. Are output to the processing unit 330. The processing unit 330 outputs a settling value corresponding to the selection result of the waveform outline signal to the comparator 23. The reference binarized signal table 343 stores the reference binarized signal corresponding to each BPF 21, and the processing unit 330 selects the waveform outline signal, that is, the reference binary corresponding to the selected BPF 21. A digitized signal is selected, and a match / mismatch determination with the binarized signal is performed (step A13 in FIG. 7).

(D) Operation of Circuit Breaker 100 In the above-described embodiment, the operation of the circuit breaker 100 to be determined is set as the closing operation. However, the operation can be similarly applied to the opening (breaking) operation.

DESCRIPTION OF SYMBOLS 1 Circuit breaker operation condition determination apparatus 10 Acceleration sensor 20 Filter unit 21 BPF, 22 RMS conversion circuit, 23 Comparator 30 Determination unit 310 Operation input part, 320 Display part, 330 Processing part 340 Storage part 341 Determination program, 342 Settling value Data 343 Reference binarized signal table, 344 Abnormality judgment condition data 345 Difference accumulated value data 100 Circuit breaker

Claims (6)

A sensor that measures vibration during operation of the circuit breaker to be judged;
Waveform summary signal generating means for generating a waveform summary signal representing characteristics of amplitude change of the measurement signal from the measurement signal of the sensor by performing at least one of signal processing of effective value calculation, envelope detection or moving average ,
Binarization means for comparing the waveform summary signal with a given settling value and converting it to a binarized signal;
A determination means for comparing the binarized signal with a reference binarized signal obtained from the measurement signal when the circuit breaker is operated in advance in a normal state to determine an operation state of the circuit breaker;
A circuit breaker operating status determination device. The determination means compares the binarized signal and the reference binarized signal in time series, and when the evaluation value based on a different location satisfies a predetermined abnormal condition, the circuit breaker is abnormal. judge,
The circuit breaker operation condition determination apparatus according to claim 1. The determination unit includes a unit that calculates the evaluation value using a coefficient for each comparison portion that is predetermined in the reference binarization signal.
The circuit breaker operation condition determination apparatus according to claim 2. The waveform outline signal generation means includes a filter that removes components other than a predetermined frequency band component included in the measurement signal, and performs signal processing for performing an effective value calculation on the signal after passing through the filter, Generate a waveform summary signal,
The circuit breaker operation condition determination apparatus as described in any one of Claims 1-3. Input means for inputting a control voltage from the circuit breaker;
Changing means for changing at least one of the settling value and the reference binarized signal to a predetermined value associated with the control voltage;
The circuit breaker operation condition determination apparatus as described in any one of Claims 1-4 provided with these. At least signal processing of effective value calculation, envelope detection or moving average is performed on the measurement signal of vibration during operation of the circuit breaker to be determined, measured by the sensor, and the amplitude change of the measurement signal is measured. Generating a waveform summary signal representing the feature;
A conversion step of comparing the waveform summary signal with a given set value to convert it to a binary signal;
A determination step of comparing the binarized signal with a reference binarized signal obtained from the measurement signal when the circuit breaker operates in advance in a normal state to determine an operation state of the circuit breaker;
Circuit breaker operating status determination method including