JPH10138923A - Signal facility checking and measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a signal facility checking and measuring device which has a simple construction, and can automatically carry out checking and measuring and perform data processing at a high speed. SOLUTION: The oscillation output from oscillators provided in an electronic train detector is supplied to respective band-pass filters 51,..., 57, 61,..., 67 which have the oscillation frequency of the respective oscillators used in the electronic train detector as a center frequency of the passband, a pair of the level values of the signals which have passed the band-pass filters 51,..., 57, 61,..., 67 and the frequency values of said signals are time division multiplexed by a data multiplexer 12, and information based on the level values of at least three high-ordered signals which are higher in level of the level values of the signals having been time division multiplexed and the frequency values of the signals is produced by a digital signal processing circuit 13 and sent out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal equipment measuring apparatus for measuring the performance of a ground, a track circuit current, a railroad crossing controller current, and the like for maintaining signal equipment scattered along a railway line.

[0002]

2. Description of the Related Art As the inspection items related to railway signal equipment, frequency characteristics and resonance sharpness Q of an ATS ground coil for emergency stop of a train or the like that overlooks a stop signal are described.
A track circuit current flowing on a rail for detecting a train, and a railroad crossing controller current flowing on a rail for detecting approaching a train and controlling opening and closing of a railroad crossing are exemplified.

[0003] Conventionally, to maintain these signal facilities, an electric inspection vehicle equipped with an inspection device is used to collect inspection data,
Judgment of the inspection results. As an example, a railroad crossing controller current will be described. The types of oscillation frequencies of the oscillator (also referred to as a level crossing control oscillator) used for the level crossing control include 8.5 kHz, 8.7 kHz, 8.91 kHz,
9.12 kHz, 9.34 kHz, 9.56 kHz,
9.79 kHz, 10.02 kHz, 10.26 kHz
z, 10.5kHz, 14kHz, 20kHz, 30k
Hz and 40 kHz.

These oscillators include those that oscillate when the track is short-circuited by the axle (open circuit type) and those that stop oscillation (closed circuit type). The characteristics of this oscillator deteriorate over time and appear as a shift in oscillation frequency or a shift in oscillation output signal level. In order to detect the oscillation frequency and oscillation output signal level of these oscillators on an electric inspection vehicle,
Measuring coils for measuring a crossing controller current are installed before and after the vehicle. Measuring circuits are provided for each type of railroad crossing controller so that the measurement can be performed in parallel even if signals of a plurality of frequencies are simultaneously input to the measurement coil for measuring the railroad crossing controller current.

The crossing controller current received by the measuring coil for measuring the crossing controller is converted into a bandpass filter (BP).
According to F), the signal is sorted for each frequency, and is divided into a signal which is directly input to the level recorder and a signal which is processed in the measuring device when a predetermined level is reached. The frequency is measured by counting the number of inputs pulsed within the reference time.

The control section length is calculated from the measured oscillation frequency and the level crossing controller current level, it is determined whether it is within an appropriate range, and the printout is made by a printer in comparison with the current vehicle position.

[0007]

However, in the above-mentioned conventional signal equipment inspection device, the inspection data of the level crossing controller current is recorded on a recording paper in the form of a chart. However, storage of a large amount of recording paper is very complicated, and there is a problem that it takes a lot of work to compare with past data.

Further, the conventional signal equipment inspection apparatus described above has a device configuration in which it is impossible to digitally process and analyze the obtained data by a personal computer or the like without manual operation. It is considered to involve inspection personnel, and there was a problem that unmanned inspection is impossible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a signal equipment inspection apparatus which has a simple configuration, can automatically perform inspection, and can perform data processing at high speed.

[0010]

According to the signal equipment inspection device of the present invention, an oscillation output from an oscillator provided in a railroad crossing controller is supplied and the oscillation frequency of each oscillator used in the railroad crossing controller is determined. A band-pass filter having a center frequency of a pass band, time-division multiplexing means for time-division multiplexing a pair of a level value of a signal passing through each of the band-pass filters and a frequency value of the signal, Signal processing means for generating and transmitting information based on the level values of at least the three higher-order signals of the higher level among the level values of the signals time-division multiplexed by the multiplexing means and the frequency values of the signals; It is characterized by having.

[0011] In the signal equipment inspection device according to the present invention, the oscillation output from the oscillator provided in the railroad crossing controller is controlled by using the oscillation frequency of each of the oscillators used in the railroad crossing controller as the center frequency of the pass band. A pair of the level value of the signal supplied to the pass filter and passing through each band-pass filter and the frequency value of the signal is time-division multiplexed by time-division multiplexing means, and the level value of the time-division multiplexed signal is obtained. Information based on the level values of at least the three highest signals of the higher middle level and the frequency values of the signals is generated and transmitted by the signal generating means.

Therefore, since the pair of the signal level value and the signal frequency value is multiplexed by the time division multiplexer, only one set of data bus is required, and the apparatus is simplified. Thus, the processing can be performed efficiently.
Furthermore, by packetizing the level values of at least the three highest signal levels and the frequency values of the signals, the packet capacity can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a signal equipment inspection device according to the present invention will be described with reference to embodiments. FIG. 1 is a block diagram showing a configuration of a signal equipment inspection device according to an embodiment of the present invention, showing a railroad crossing controller current inspection unit.

The signal equipment inspection device 1 according to one embodiment of the present invention converts an oscillation output signal output from a multi-frequency oscillator 20 that simultaneously outputs an oscillation output in a wide frequency range of about 100 kHz to 130 kHz into a ground signal. It is supplied to a common measurement coil 2 provided for inspection, track circuit current detection, and railroad crossing controller current detection measurement, and is sent out.

The grounding element 21 is constituted by a resonance circuit composed of a coil and a capacitor. The measuring coil 2 receives the oscillation output signal output from the multi-frequency oscillator 20 and radiates it to the grounding element 21 side. 21 is a secondary coil for transmitting a signal induced by the resonance current. On the other hand, the crossing controller current flowing through the track is detected by electromagnetic coupling with the measuring coil 2, and the
And 4 to be amplified to a predetermined level.

The crossing controller current amplified by the amplifier 3 is used to detect the signal of the oscillation frequency of the crossing controller oscillator so that the center frequency of the pass band corresponding to the oscillation frequency is 8.5 kHz. A pass filter 51, a band-pass filter (not shown) having a center frequency of a pass band of 8.91 kHz, a band-pass filter (not shown) of 9.34 kHz, a band-pass filter (not shown) of 9.79 kHz, and a band (not shown) of 10.26 kHz The signal is supplied to a band-pass filter group 5 including a pass filter, a band-pass filter (not shown) of 14 kHz, and a band-pass filter 57 of 30 kHz, and is separated by the band-pass filter group 5 based on the frequency.

The railroad crossing controller currents separated on the basis of the frequency by the band-pass filter group 5 correspond to the A / Ds corresponding to the band-pass filters of the band-pass filter group 5, respectively.
Converters 71... Are converted into digital data (digital data is also referred to as measurement digital data. In the drawing, the data is also referred to simply as data when no misunderstanding is caused) by the A / D converter group 7 including the A / D converter 77. Is done. A
The digital data converted by the / D converter group 7 is latched by the latch circuit 9.

The railroad crossing controller current amplified by the amplifier 4 is used to detect the signal of the oscillation frequency of the railroad crossing controller oscillator so that the center frequency of the pass band corresponding to the oscillation frequency is 8.7 kHz. A pass filter 61, a band pass filter (not shown) having a center frequency of 9.12 kHz, a band pass filter (not shown) having a frequency of 9.56 kHz, a band pass filter not shown having a frequency of 10.02 kHz, and a band not shown having a frequency of 10.5 kHz It is supplied to a band-pass filter group 6 including a pass filter, a band-pass filter (not shown) of 20 kHz, and a band-pass filter 67 of 40 kHz, and is separated by the band-pass filter group 6 based on the frequency.

The railroad crossing controller currents separated based on the frequency by the band-pass filter group 6 correspond to the A / Ds corresponding to the band-pass filters of the band-pass filter group 6, respectively.
Converters 81... The data are individually converted into digital data by an A / D converter group 8 including an A / D converter 87. A / D
The digital data converted by the converter group 8 is latched by the latch circuit 10.

Here, the center frequency of the pass band is 8.5 k.
Hz, 8.7 kHz, 8.91 kHz, 9.12 kHz
z, 9.34 kHz, 9.56 kHz, 9.79 kHz
z, 10.02kHz, 10.26kHz, 10.5k
It is convenient to use a mechanical filter having a narrow pass band for ten kinds of bandpass filters of 10 Hz.

Each of the A / D converters constituting the A / D converter groups 7 and 8 converts the output from the corresponding band-pass filter into, for example, 16-bit measurement digital data. The output is divided into two bits and the lower 8 bits.

Output from the A / D converter groups 7 and 8,
The 14 types of measurement digital data latched in the latch circuits 9 and 10 are supplied to the data multiplexer 11 and multiplexed. As shown in FIG. 2, the data multiplexer 11 includes a three-state buffer 112 controlled by a control signal output from the multiplex timing controller 111.
And 113, and three-state buffers 112 and 11
A latch circuit 114 for latching the measurement digital data output from the three-state buffer 112 and the three-state buffer 113
Is time-division multiplexed with the measurement digital data output from the multiplex timing controller 111 based on a control signal output from the multiplex timing controller 111, and latched by the latch circuit 114 for transmission. Note that an A / D conversion control signal is output from the multiplex timing controller 111 to control the conversion timing of the A / D converter groups 7 and 8.

The data output from latch circuit 9 is shown in FIG.
3A, the data output from the latch circuit 10 is as shown in FIG. 3B, and the data that is time-division multiplexed and transmitted in the data multiplexing circuit 11 is shown in FIG. ). Data multiplexer 1
The multiplexed data output from 1 is supplied to the data multiplexer 12. As described above, since the outputs from the A / D converters 7 and 8 are multiplexed by the data multiplexer 11, the data transmission to the data multiplexer 12 can be performed by one data bus. In the drawings, the frequency display kHz is simply abbreviated as k.

The data multiplexer 12 is, as shown in FIG.
The measurement digital data, which is controlled by the control signal output from the multiplex timing controller 121 and separated by the band-pass filters of the band-pass filter groups 5 and 6, converted into digital data and divided into 8 bits, is converted into 16 bits. Retiming circuit 122 for returning to the measurement digital data of
3-state buffers 123 and 124 controlled by a control signal output from
The threshold value generating means sends threshold data which is a predetermined threshold value for comparison with the data output from the re-timing circuit 2, for example, a threshold value for detecting the 0 level by comparing the data output from the retiming circuit 122. Threshold data generator 125 and frequency counter unit 12
6, and 1 output from the retiming circuit 122.
6-bit measurement digital data and frequency counter unit 12
The 16-bit frequency data output from 6 is time-division multiplexed via 3-state buffers 123 and 124.

The frequency counter unit 126 compares the 16-bit measurement frequency digital data output from the retiming circuit 122 with the threshold data output from the threshold data generator 125 and sends a comparison output. And the re-timing circuit 1 detects, for example, a rising transition point of the comparison output from the comparator 127.
A change point detector 128 that outputs as information of a frequency corresponding to the measurement digital data output from 22, a 100 ms counter that counts a clock pulse for a period of 100 ms, and a count output of the 100 ms counter starts and stops counting. Controlled change point detector 12
The band-pass filters 51 to 5 are used to count the number of transition points output from 8 for a period of 100 ms to obtain a frequency value.
, 144, and 145 corresponding to the respective center frequencies of the pass bands of 7, 61 to 67;
A multiplexer 146 for multiplexing the count values of the frequency counters 131, 132,..., 144, 145 and sending the multiplexed value to the three-state buffer 124. The frequency data of the signals separated by the band-pass filter groups 5 and 6 are multiplexed. Output.

Here, the threshold data generator 1
The comparator 127 compares the threshold data output from the threshold data 25 with the measurement data, sends a signal exceeding the threshold data to the change point detector 128, and measures a signal based on the rising edge from the change point detector 128. An output is sent to a frequency counter of a frequency corresponding to the digital data. More specifically, for example, a signal output from the change point detector 128 based on measured digital data of a signal that has passed through the band-pass filter 51 whose center frequency of the pass band is 8.5 kHz is a frequency counter 131.
Sent to

Frequency counters 131, 134,..., 14
The count values at 4 and 145 are 回 数 of the number of times that the signal based on the measured digital data crosses the value based on the threshold data, and this is counted by the frequency counter for 100 ms.
The count values at 34,..., 144 and 145 correspond to the frequency of the signal based on the measured digital data. The count value of the counter corresponding to the frequency of the signal passed through the band-pass filters 51,..., 57, 61,.

Frequency counters 131, 132..., 14
4, 145 are band-pass filters 51,.
In correspondence with the center frequencies of the pass bands 7, 61,..., 67, in FIG.
, ..., 30kHz, 40kHz,
, 144, and 145, the frequency values of the signals corresponding to the multiplexed measurement digital data are determined, and the frequency values are determined by the frequency counters 131, 134,. It is output as bit frequency data.

A 16-bit output from the retiming circuit 122 via the three-state buffer 123;
Multiplexer 14 via 3-state buffer 124
The output of 6 is multiplexed with the 16-bit output and transmitted. Therefore, the multiplexed data which is time-division multiplexed and transmitted by the data multiplexer 12 is shown in FIG.
As shown in (b), the band-pass filter groups 5 and 6
The measured digital data corresponding to the level of the signal that has passed through and the measured digital data are output, followed by the frequency data of the signal corresponding to the measured digital data.

The data output from the data multiplexer 12 is supplied to a digital signal processing circuit 13, where the bandpass filters 51,.
, 67, and outputs the effective current value of each of the outputs from the calculated effective value data to the interface circuit 15 at least the upper three effective value data and the corresponding frequency data. Here, in the example according to the present embodiment, upper three effective value data and frequency data are taken. This is because it is sufficient if the effective value data and the frequency data of the railroad crossing controller current up to three points ahead of the train can be measured.

As described above, the measurement digital data is multiplexed in a time-division manner by the data multiplexer 12, so that the digital signal processing circuit 13 can perform sequential processing.

The data sent from the digital signal processing circuit 13 and the 0.5 m data detected by the vehicle position detector 14
, A detection pulse output every time the vehicle travels the distance A, a track circuit current data ATS ground probe data measured by the ground probe measurement unit 18, and a track detected by the track circuit current detection measurement unit 19. The circuit current data is supplied to the interface circuit 15. In the interface circuit 15, the effective value data and the frequency data of the railroad crossing controller current, the effective value data and the frequency data of the track circuit current, the ATS ground child data, and the header for packet identification are put together, so that the vehicle travels a distance of 0.5 m. One packet is generated each time the process proceeds, and stored in an internal memory (not shown) via the CPU 16. The data stored in the internal memory is stored in an external storage device (such as an MO) 1 when necessary.
7 is written.

Also, in the digital signal processing circuit 13, the capacity of the packets stored in the internal memory of the CPU 16 can be greatly reduced because the effective value data of the railroad crossing controller current is taken as the upper three.

Next, the generation of track circuit current data and ATS ground slave data will be described.

The track circuit current data is obtained by extracting a multiplexed signal of 25 to 120 Hz from the signal output from the measuring coil 2 and sampling it every time the vehicle travels a distance of 0.5 m, and converting the sampled signal into a digital signal. Processing is performed to calculate the effective value and the frequency value, and the track circuit current data is transmitted.

The ATS terrestrial data is obtained by extracting a multiplexed signal of 100 to 130 kHz from the signal output from the measurement coil 2, decomposing the multiplexed signal into frequency components by fast Fourier transform, and decomposing the multiplexed signal into frequency components. From the frequency fm exhibiting the maximum level and the frequencies f1 and f2 exhibiting levels 3 dB lower than the maximum level, the resonance frequency fm and Q (= fm / (f2-f1)) of the ground element are obtained, and the ATS ground element is obtained. Send as data.

The packet generated in the interface circuit 15 includes the effective value data and frequency data of the level crossing controller current, the effective value data and frequency data of the track circuit current, the ATS ground element data, and a header for identifying the packet. Packet, vehicle is 0.5m
It is transmitted as one packet each time it proceeds. The packet configuration is, for example, as shown in FIG.

Here, the header is information indicating the contents of the packet. Level crossing controller current, ATS in the range of distance 0.5m
Since there are not all ground terminals, there is a packet configuration as shown in FIG. 8 (a) when there is only track circuit current, and FIG. 8 (b) when there is both track circuit current and railroad crossing controller current. When the track circuit current and the ATS are present, a packet configuration as shown in FIG. 8C is obtained.

Also, both the railroad crossing controller current and the track circuit current
Regarding the effective current value of the packet, it is faster to obtain the square of the effective value instead of obtaining the effective value in the digital signal processing circuit 13. For this reason, it is more efficient to form a packet with the squared data of the effective value and return to the effective value at the time of data analysis.

The data packetized for each measurement section can be analyzed and managed by, for example, a general-purpose computer. In addition, by packetizing each measurement section as described above, it becomes easy to analyze and manage data.

Next, a modification of the frequency counter 126 will be described. The frequency counter 200 according to the present modification shown in FIG. 9 instead of the frequency counter 126 includes a comparator 127,
A change point detector 128 and frequency error counters 201, 202,..., 2 for counting the output from the change point detector 128.
13, 214, a 100 ms counter 215 for counting clock pulses for 100 ms, and frequency error counters 201, 202,..., 213, 214 are read by the 100 ms counter 125 every 100 ms, and the read frequency is read. Error counter 201, 2
, 222,..., 23 for adding an offset value to the count values of 02,.
3, 234, a frequency code generator 217 for generating a frequency code corresponding to the center frequency of the pass band of the band-pass filter, and offset addition circuits 221, 222,
.., 233, 234 and frequency code generator 217
And a time-division multiplexer 218 for time-division-multiplexing and outputting the frequency code.

The comparator 127 and the change point detector 128 are the same as those in the case of the frequency counter unit 126, and a description thereof will be omitted. Frequency error counters 201, 202,...
Reference numerals 213 and 214 denote bandpass filters 51 to 57 and 61.
And a counter that counts frequencies in a slightly wider range than the pass band width.

Frequency error counters 201, 202,...
213 and 214 will be described using the frequency error counter 201 as an example. The band-pass filter 51 has a center frequency of the pass band of 8.5 kHz. When the band-pass filter 51 is constituted by a mechanical filter, the pass band width is (8500-30H).
z) to (8500 + 30 Hz), and frequencies outside this range are not passed. Therefore, the frequency error counter 201 only needs to be able to count frequencies in a range slightly larger than this range, and the measurement frequency range is set to 8350 to 8650H.
a 30-digit counter corresponding to z, ie, the count number 31
And counts the frequency of the output signal from the band-pass filter 51 output via the change point detector 128.

However, the frequency counter 131 counts 850 for a frequency of 8.5 kHz. However, in the frequency error counter 201, the count value makes one round with 31 counts. 8.5k when the count value is 12
Hz. The offset value adding circuit 221
To add the offset value 4, and the offset value adding circuit 2
When output from 21 to 15, it corresponds to 8.5 kHz. Therefore, in the case of the frequency error counter 201, the count values 0 to 30 correspond to 8350 Hz to 8650 Hz.

The same applies to other frequency error counters, and the frequency error counter is as schematically shown in FIG. In FIG. 10, the frequency error counter is indicated as for the center frequency of the pass band of the corresponding band-pass filter, the frequency range that can be measured by the frequency error counter for each of the frequency error counters, the count range, the number of counts, and the count before correction. The value, the corrected count value, and the frequency code are displayed. The count range indicates the range of count values counted by the frequency error counter, the count number indicates the number of counts for one round of counting by the frequency error counter, and the count value before correction is the center frequency f of the pass band of the band-pass filter. The count value of the frequency error counter with respect to ₀ indicates the count value, and the count value after correction indicates a value obtained as a result of adding the offset value to the count value before correction by the offset value adding circuit.

In the frequency counter 200, as shown in FIG. 10, a frequency error counter of 8.5 kHz to 10.5 kHz counts 31 and a frequency error counter of 14 kHz to 40 kHz.
The frequency error counter of FIG. This is because it is possible to measure a range symmetrical about the center frequency f ₀ . However, basically, if the measurement range is increased, the count number is not related to the above example. In particular, the frequency error counter of 8.5 kHz to 10.5 kHz counts 32, and 14 kHz to 40 kHz.
If the frequency error counter of z is set to a power of 2 so as to count 1024, the circuit configuration can be simplified.

In the frequency counter 200, the offset value is added to the count value of the frequency error counter by the offset value adding circuit, but the offset value adding circuit is replaced with a counter corresponding to each of the frequency error counters. The configuration may be such that an offset value to be loaded is loaded. The addition of the offset value may be performed during data analysis.

Further, the frequency code corresponding to the center frequency of the pass band of the band-pass filter generated by the frequency code generation circuit 217, that is, the oscillation frequency of the level crossing controller, is time-division multiplexed to the output from the offset value addition circuit. And sent out. An example of the frequency code is shown in hexadecimal notation, as shown in FIG.

As a result of the above, as the frequency code is time-division multiplexed, when selecting data for each frequency at the time of data analysis, it is sufficient to select based on the frequency code, and the frequency code is added. This is easier than in the case of the frequency counter 126 that is not provided, and the analysis speed is higher than in the case of data obtained by the frequency counter 126.

[0050]

As described above, according to the signal equipment inspection device according to the present invention, the signal equipment inspection device according to the present invention can be installed in a train to perform signal equipment inspection. In addition, it can be mounted on a commercial vehicle to perform automatic inspection of signal equipment. As a result, the inspection can be performed more inexpensively and more frequently than in the case of the conventional inspection using an electric inspection vehicle, and the signal equipment can be reliably maintained.

Further, according to the signal equipment inspection device of the present invention, pairs of signal level values and signal frequency values are multiplexed, so that only one data bus is required and the device is simplified. In addition, efficient processing can be performed by the signal processing means. Furthermore, the packet capacity can be reduced by packetizing the level values of at least the three highest signal levels and the frequency values of the signals.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a signal equipment inspection device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a data multiplexer (11) in the signal equipment inspection device according to one embodiment of the present invention.

FIG. 3 is a schematic diagram showing data output from an A / D converter in the signal equipment inspection device according to one embodiment of the present invention.

FIG. 4 is a schematic diagram showing data output from the data multiplexers (11) and (12) in the signal equipment inspection device according to the embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a data multiplexer (12) in the signal equipment inspection device according to one embodiment of the present invention.

FIG. 6 is a diagram for explaining a count value of a frequency counter in a frequency counter unit in the signal equipment inspection device according to the embodiment of the present invention;

FIG. 7 is a diagram for explaining a packet configuration in the signal equipment inspection device according to the embodiment of the present invention;

FIG. 8 is a diagram for explaining a packet configuration in the signal equipment inspection device according to the embodiment of the present invention;

FIG. 9 is a block diagram showing a configuration of a modified example of the frequency counter unit in the signal equipment inspection device according to the embodiment of the present invention.

10 is a diagram provided for explanation of a frequency error counter, an offset value addition circuit, and a frequency code generation circuit in the frequency counter section shown in FIG. 9;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 signal equipment inspection device 2 measurement coil 5 and 6 bandpass filter group 7 and 8 A / D converter group 9 and 10 latch circuit 11 and 12 data multiplexer 13 digital signal processing circuit 14 vehicle position detection circuit 15 interface circuit Reference Signs List 20 Multi-frequency oscillator 21 Terrestrial 126 and 200 Frequency counter unit

(72) Inventor Shuichi Okamoto 1-14-6 Dogenzaka, Shibuya-ku, Tokyo Kenwood Co., Ltd.

Claims (3)

[Claims] A band-pass filter to which an oscillation output from an oscillator provided in the railroad crossing controller is supplied and the oscillation frequency of each of the oscillators used in the railroad crossing controller is set as a center frequency of a pass band; Time-division multiplexing means for time-division multiplexing a pair of the level value of the signal passed through the band-pass filter and the frequency value of the signal; and A signal processing means for generating and transmitting information based on the level values of at least the three highest signals and the frequency values of the higher signals. 2. The signal equipment inspection device according to claim 1, wherein the time division multiplexing means includes a threshold value output means for outputting a threshold value set to a predetermined value in advance, and a frequency counter corresponding to each bandpass filter. ,
A comparator that compares the level value of the input signal with the threshold value output from the threshold output unit and sends out a signal over a period in which the level value of the input signal exceeds the threshold value; and a change in one of the signals output from the comparator. And a change point detector means for sending an output signal to a frequency counter corresponding to the band-pass filter that sent the input signal when detecting a point and detecting a change point. Signal equipment inspection equipment. 3. The signal equipment inspection apparatus according to claim 1, wherein the information, ground terminal data, and track circuit current data transmitted from the signal processing means are packetized and transmitted. apparatus.