JP5465059B2 - Track circuit fault location identification device - Google Patents

Description

  The present invention relates to a track circuit fault site identification device that identifies a fault site in addition to determining whether or not a rail track circuit has a fault.

The track circuit divides the track on which the train travels into several sections for train detection, etc., and transmits a train detection signal from one end of each section and receives a train detection signal from the other end of the corresponding section In the section in the train line, the presence / absence of the train is determined according to the presence / absence of the received signal based on the fact that the track is short-circuited by the train wheel and axle (for example, non-patent) Reference 1 and Patent Document 1).
In addition, such a track circuit transmission device is known to have a diagnostic routine and a watchdog timer for self-diagnosis (see, for example, Patent Document 2).
Further, for CTCs, there is one that detects a transmission level and determines which one of the transmission / reception transmission apparatus and the intermediate transmission line is defective at one place (see Patent Document 3).

JP 2005-262895 A JP 2000-168554 A JP 2005-029009 A Japanese Utility Model Publication No. 3-50583

Overview of Signals for Railway Electrical Engineers “Track Circuit”, page 3, published by Japan Railway Electrical Engineering Association, revised edition 20 May 2005

Similarly, for track circuits, it is expected that the failure of the track circuit can be detected by detecting the level of the received signal and discriminating with the threshold value. Since the received signal level changes significantly, it is necessary to make a modification such that the failure determination is performed only when the train is absent, so that the failure on the receiving device and the track side can be detected even in the track circuit.
Of course, in the track circuit, transmission / reception devices and determination devices are installed together in the equipment room of the center or the station, but each section of the track is widely spread over a long distance and long between them. Since the train detection signal transmission cable is laid, when there is a failure on the track side, it is necessary to search around where the fault is among the long transmission side cable, in-track section and reception side cable. Recovery takes a lot of time.

This inconvenience is because the failure point could not be specified until the track side was subdivided in the conventional threshold judgment, so if the cable and track can be separated by increasing the threshold, etc., the recovery time will be shortened. Thus, the above disadvantages should be greatly improved.
However, since the cable length varies greatly from connection to connection and the length of the track section also varies from place to place, it is cumbersome and difficult to set a large number of threshold values to reflect the individual laying conditions. An easy-to-use device cannot be made by simply diverting technology.
Therefore, it is a technical problem to devise a threshold determination method and a physical quantity to realize a track circuit fault site identification device that can be used with high accuracy and is easy to use.

  The track circuit fault site identification device of the present invention (Solution means 1) was devised to solve such a problem, and is connected to the track circuit to transmit power transmission end voltage and power transmission end current of the track circuit. A measurement unit that continuously measures the receiving end voltage of the track circuit, a measurement data collection unit that accumulates a measurement value obtained by the measurement in a measurement data storage unit, and a normal time and a train absent line from the accumulated data Normal characteristic value calculating means for obtaining a reference impedance at the time of absence line corresponding to the ratio between the transmission end voltage value and the transmission end current value by extracting the measured value, and measurement at the time of failure and at the time of absence of train from the accumulated data The value is extracted to determine the transmission impedance at the time of the absent line corresponding to the ratio between the voltage value at the transmission end and the current value at the transmission end, and the transmission impedance ratio corresponding to the ratio between it and the reference impedance at the time of the absence line. And failure-time characteristic value calculating means, and a determination means divides the case to determine the receive cable break and short-circuit fault and the transmission cable break and the rail break in the track circuit, based on the magnitude of the power impedance ratio and the threshold value.

  Further, the track circuit fault site identification device of the present invention (solution means 2) is the track circuit fault site identification device of the solution means 1, wherein the normal characteristic value calculation means is normal and train failure is determined from the accumulated data. The measured value at the time of standing line is extracted to obtain the reference reception voltage at the time of absence line corresponding to the voltage value at the receiving end, and the characteristic value calculation means at the time of failure is the receiving end at the time of failure and at the time of absence of train from the accumulated data A voltage value is extracted and a reception level at the time of a track circuit failure corresponding to the ratio of the reference reception voltage at the time of absence is obtained, and when the case determination unit determines that a short-circuit failure has occurred, the track circuit failure time further A rail short circuit of the track circuit is determined based on the magnitude of the reception level and the threshold value.

  Furthermore, the track circuit fault site identification device of the present invention (solution means 3) is the track circuit fault site specification device of the above solution means 2, wherein the normal characteristic value calculation means is normal and train existing line from the accumulated data. The measured value at the time is extracted to obtain the reference impedance at the time of standing line corresponding to the ratio between the transmission end voltage value and the transmission end current value, and the reference impedance ratio corresponding to the ratio between it and the reference impedance at the absence line is obtained. Yes, when the case determining means determines a short-circuit failure, it further determines a rail short circuit, a transmission cable short circuit, and a reception cable short circuit of the track circuit based on the magnitude of the power transmission impedance ratio and the reference impedance ratio. It is characterized by that.

  In such a track circuit fault site identification device of the present invention (Solution 1), if the track circuit is connected to the track circuit from a normal state where there is no failure in the track circuit, the power transmission end voltage and power transmission end current of the track circuit are determined. And the receiving end voltage of the track circuit are continuously measured and accumulated. When the normal characteristic value calculating means, the failure characteristic value calculating means, and the case-identifying means are operated at the time of the failure of the track circuit, the transmission cable disconnection, the rail breakage, the reception cable disconnection, and the short circuit of the track circuit are performed based on the accumulated data. A failure is determined. As a result of confirming the disconnection state and the short-circuit state for many and various track circuits, this discrimination method can obtain correct answers at a high rate exceeding 89 percent, although it does not reach 100. In addition, if the track circuit implementation method is the same, the threshold value may be the same regardless of the length of the cable or rail, which makes it easy to use.

Further, in the track circuit fault site identification device according to the present invention (solution means 2), even the rail short circuit of the track circuit is determined based on the accumulated data. Furthermore, in the track circuit fault site identification device according to the present invention (solution 3), the transmission circuit short circuit and the reception cable short circuit of the track circuit are also determined based on the accumulated data.
Therefore, according to the present invention, it is possible to realize an easy-to-use track circuit fault site identification device that can perform the separation between the cable and the track with high accuracy.

It is a block diagram which shows the whole structure of a track circuit fault location identification apparatus about Example 1 of this invention. It is a flowchart which shows the discrimination | determination procedure when there is no resonance capacitor among case division discrimination means. It is a flowchart which shows the discrimination | determination procedure when there exists a resonance capacitor among the case division discrimination means. It is a block diagram which shows the whole structure of a track circuit fault location identification apparatus about Example 2 of this invention.

About the track circuit fault site | part identification apparatus of such this invention, the specific form for implementing this is demonstrated by the following Examples 1-2.
The embodiment 1 shown in FIGS. 1 to 3 embodies all of the above-described solving means, but is basic for one section, and the embodiment 2 shown in FIG. It is a practical one targeted.
The embodiment described here is adapted to a track circuit called SMET, and SMET is necessary for INV of 83/100 Hz track circuit or large frequency divider of frequency track circuit. In order to make the power supply apparatus inexpensive, time-division transmission is performed on the orbit and six orbit circuits are integrated into one transmitter.

  A specific configuration of the track circuit fault site identification device according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the overall structure of the track circuit fault site identification device 20, and FIG. 2 is a flowchart showing a determination procedure when the resonance capacitor C is not included in the determination procedure of the case determination determination unit 29. FIG. 3 is a flowchart showing a determination procedure in the case where the resonance capacitor C is present, among the determination procedures of the case classification determination means 29.

  Prior to the description of the track circuit failure site identification device 20, the basic configuration of the track circuit 10 to be connected will be described. The track circuit 10 transmits, for example, a 120 Hz AC signal generated by the transmitter 11 in the equipment room to the track on the site via the transmission cable 12 and then to the target section of both ends insulation in the rail 14 via the impedance bond 13. And then picked up from the other end side of the target section via the impedance bond 15 and further transmitted to the receiving unit 17 of the equipment room by the receiving cable 16, and detected according to the level of the detection signal. The presence or absence of a train in the target section of the rail 14 is indicated by the output of the track circuit relay TR, for example.

This track circuit failure site identification device 20 (see FIG. 1) is a basic device that targets one section of the rail 14 of the track circuit 10 and is connected to the track circuit 10 and repeats measurement at, for example, a constant period. 21 to 23, and an analysis unit 24 that performs an estimation calculation for specifying a faulty part of the track circuit 10 based on the measurement result.
The measurement units 21 to 23 measure the power transmission end voltage measurement unit 21 that measures the power transmission end voltage of the transmission part from the transmission unit 11 to the transmission cable 12 for the above-described AC signal transmitted and received through the target section of the rail 14, and A power transmission end current measurement unit 22 that measures the power transmission end current of the transmission part and a power reception end voltage measurement unit 23 that measures the power reception end voltage of the input part from the reception cable 16 to the reception unit 17 are provided.

  The analysis unit 24 may be a fail-safe computer widely used in the railroad field or a commercially available general-purpose computer as long as it has an appropriate arithmetic device and storage device, and is realized by an A / D conversion circuit or a data input program. Circuit measurement data collecting means 25, a measurement data storage section 26 allocated to a non-volatile large-capacity memory such as a hard disk, a normal characteristic value calculating means 27 and a failure characteristic value calculation, both embodied by a program. Means 28 and case classification determination means 29 are provided. A keyboard and mouse as input devices for giving operation instructions and the like, and a display as an output device for presenting the discrimination results are also provided.

  The measurement data collection means 25 uses the measured values obtained by the measurements of the transmission end voltage measurement unit 21, the transmission end current measurement unit 22, and the reception end voltage measurement unit 23, respectively, as the transmission end voltage value Vs, the transmission end current value Is, The power receiving end voltage value Vr is input. At that time, the power transmitting end voltage value Vs is divided by the power transmitting end current value Is to calculate the power transmitting end impedance Zs, and whether the power receiving end voltage value Vr exceeds a predetermined threshold Th. After calculating the train absent line information Tr indicating whether it is a train absent line or a train present line depending on whether or not, the data is additionally written to the measurement data storage unit 26 in combination with the time t. . In the measurement data storage unit 26, for example, the set data is accumulated in a time series over a long period of time such as several days or several laps in a first-in first-out method.

  The measurement data collecting means 25 and the measurement units 21 to 23 are basically constantly operating and continuously storing data. However, the normal characteristic value calculating means 27, the failure characteristic value calculating means 28, and the case classification determining means 29 are not The operation is performed when an operation instruction is given by the input device by the operation of a person who has noticed the above. In the instruction, in addition to the normal initial stage and the final stage where it has been found that the track circuit 10 has no fault, the fault time at which the fault has been found is also given by manual input. Each time the measurement data collection means 25 inputs each measurement value Vs, Is, Vr, it is checked whether the value is within the known normal range or deviates from the normal range. It is also possible to automatically detect the initial stage, the final stage, and the failure time.

  The normal characteristic value calculation means 27 first accesses the measurement data storage unit 26, extracts the normal measurement value from the stored data stored and held therein, and uses it as the data when the train is on the train. It is divided into data at the time of standing, and a large number of values are combined into one for each measured value Vr, Zs at the time of train presence and at the time of absence of train. In the extraction process, the measurement value is extracted from the set data that falls between the initial period and the end of the normal period. In the data classification process, the value of the train line information Tr is used. Although it divides, the measured value of a stable state is used by removing the data before and after changing from a train absent line to a train absent line, or a train absent line to a train present line from a processing target.

  The normal characteristic value calculation means 27 then obtains some reference values for determination from the measured values Vr, Zs in normal times collected into the representative value when the train is present and the representative value when the train is absent. It has become. Specifically, the power transmission end impedance Zs at the time of normal and train presence is adopted as the reference impedance Za at the time of presence, and the power transmission end impedance Zs at the time of normal and absence of the train is adopted as the reference impedance Zb at the time of absence. The reference impedance ratio Zc is calculated by dividing the hourly reference impedance Za by the absent line reference impedance Zb, and the power receiving end voltage value Vr in the normal state and in the absence line of the train is adopted as the reference reception voltage Vd in the absent line. In addition, the receiving end voltage value Vr when the train is on line is adopted as the on-line reference reception level Ve.

  First, the failure characteristic value calculation means 28 accesses the measurement data storage unit 26, extracts the measurement value at the time of failure from the accumulated data stored and held therein, and uses it as the data at the time of train presence and the train failure. It is divided into data at the time of standing, and a large number of values are combined into one for each measured value Vr, Zs at the time of train presence and at the time of absence of train. In the extraction process, the measurement value is extracted from the set data in which the time t is between the failure time and the present time. In the data classification process, the value of the train line information Tr is used. Although it divides, the measured value of a stable state is used by removing the data before and after changing from a train absent line to a train absent line, or a train absent line to a train present line from a processing target.

  The failure characteristic value calculation means 28 then obtains some reference values for determination from the measured values Vr and Zs at the time of failure that are aggregated into the representative value when the train is present and the representative value when the train is absent. It is like that. Specifically, the transmission end impedance Zs at the time of failure and at the time of the absence of the train is adopted as the transmission impedance Zg at the time of the absence line, and the transmission impedance ratio Zh is calculated by dividing the transmission impedance Zg at the absence line by the reference impedance Zb at the absence line. Receiving at the time of absence by calculating and calculating 20 log (Vr / Vd) by applying a logarithmic function after dividing the receiving end voltage value Vr at the time of failure and at the time of absence of the train by the reference reception voltage Vd at the time of absence The level Vi is calculated and adopted as the on-line determination reception level Vj with respect to the power receiving end voltage value Vr when the train is on line at normal time.

The case classification determination unit 29 performs case classification based on the above-described reference impedance ratio Zc, on-line reference reception level Ve, transmission impedance ratio Zh, absent line reception level Vi, and on-line determination reception level Vj. However, in order to classify the case more finely, the parameter setting indicating whether or not the resonance capacitor C is connected to the connection portion of the receiving circuit 17 of the track circuit 10 with the reception cable 16 is also referred to.
When the resonance capacitor C is not connected to the receiving unit 17 (see FIG. 2), the transmission impedance ratio Zh, the absence line reception level Vi, the presence line determination reception level Vj, the presence line reference reception level Ve, and the transmission impedance The ratio Zh and the reference impedance ratio Zc are examined in this order to determine where the track circuit 10 has failed.

  That is, the case classification determination unit 29 compares the transmission impedance ratio Zh with the three threshold values “5.0”, “1.5”, and “1.0” (step S21), and the transmission impedance ratio Zh is 5 If it is 0 or more, it is determined that the transmission cable 12 is disconnected in the track circuit 10, and if the transmission impedance ratio Zh is less than 5.0 and 1.5 or more, the rail 14 in the track circuit 10 is If the power transmission impedance ratio Zh is less than 1.5 and 1.0 or more, it is determined that the receiving cable 16 of the track circuit 10 is disconnected. When the transmission impedance ratio Zh is less than 1.0, the absence line reception level Vi is further compared with the threshold “−40 dB” (step S22), and if the absence line reception level Vi is −40 dB or more, the orbit. It is determined that the rail 14 of the circuit 10 is short-circuited.

  When the absence line reception level Vi is less than −40 dB, the case determination unit 29 further compares the presence line determination reception level Vj with the presence line reference reception level Ve (step S23), and the presence line reference reception level Ve. Is at or above the on-line determination reception level Vj, it is determined that the transmission cable 12 or the reception cable 16 of the track circuit 10 is short-circuited. If the in-line reference reception level Ve is smaller than the in-line determination reception level Vj, the power transmission impedance ratio Zh and the reference impedance ratio Zc are further compared (step S24), and the power transmission impedance ratio Zh is greater than or equal to the reference impedance ratio Zc. For example, it is determined that the receiving cable 16 of the track circuit 10 is short-circuited, and if the transmission impedance ratio Zh is smaller than the reference impedance ratio Zc, it is determined that the transmission cable 12 of the track circuit 10 is short-circuited. Yes.

  In addition, when the resonance capacitor C is connected to the receiving unit 17 (see FIG. 3), the case determination unit 29 compares the transmission impedance ratio Zh with the two threshold values “5.0” and “1.0”. (Step S31), if the transmission impedance ratio Zh is 5.0 or more, it is determined that the transmission cable 12 of the track circuit 10 is disconnected, and the transmission impedance ratio Zh is less than 5.0. If it is 0 or more, it is determined that the rail 14 of the track circuit 10 is broken. Then, when the transmission impedance ratio Zh is less than 1.0, the absence line reception level Vi is further compared with the threshold “−20 dB” (step S32), and the absence line reception level Vi is −20 dB or more. For example, it is determined that the rail 14 of the track circuit 10 is short-circuited.

  When the absence line reception level Vi is less than −20 dB, the case determination unit 29 compares the transmission impedance ratio Zh with the threshold “0.665” again (step S33), and the transmission impedance ratio Zh is 0.665. If it is more than it, it will determine with the receiving cable 16 being disconnected in the track circuit 10, and when the transmission impedance ratio Zh is less than 0.665, the absence level reception level Vi and the threshold value “−40 dB” are further compared. (Step S34), it is determined that the rail 14 of the track circuit 10 is short-circuited if the reception level Vi at the absence line is -40 dB or more, and if the reception level Vi at the absence line is less than -40 dB, the presence line is further The time-determined reception level Vj is compared with the in-line reference reception level Ve (step S35), and the in-line reference reception level Ve is equal to or greater than the in-line determination reception level Vj. Transmission cable 12 or the reception cable 16 of the track circuit 10 if there is adapted to determine that the short-circuited.

  When the in-line reference reception level Ve is smaller than the in-line determination reception level Vj, the case determination unit 29 further compares the transmission impedance ratio Zh with the reference impedance ratio Zc (step S36), and the transmission impedance ratio Zh is the reference. If the impedance ratio is equal to or greater than Zc, it is determined that the receiving cable 16 is short-circuited in the track circuit 10, and if the transmission impedance ratio Zh is smaller than the reference impedance ratio Zc, the transmission cable 12 is short-circuited in the track circuit 10. It comes to judge. Since the influence of the resonance capacitor C is small, the latter half discrimination processes S34 to S36 in the case where the resonance capacitor C is present are the same as the latter half discrimination processes S22 to S24 in the case where the resonance capacitor C is not present. Yes.

  The use mode and operation of the track circuit fault site identification device 20 of the first embodiment will be described with reference to the drawings. FIG. 1 is a block diagram in which the track circuit fault site identification device 20 is used by being connected to the track circuit 10.

  In order to identify the failure site of the track circuit 10 using the track circuit failure site specifying device 20, the track circuit failure site specifying device 20 is attached to the track circuit 10 in advance, and the track circuit 10 before failure occurs. The track circuit failure site identification device 20 is operated from the normal time. When installing the track circuit fault site identification device 20, the voltage measurement cable of the power transmission end voltage measurement unit 21 and the current measurement cable of the power transmission end current measurement unit 22 are connected to the AC signal transmission site from the transmission unit 11 to the transmission cable 12. The voltage measurement cable of the receiving end voltage measurement unit 23 is connected to the AC signal input portion from the reception cable 16 to the reception unit 17, and the analysis unit 24 has a track circuit configuration including the presence or absence of the resonance capacitor C, the track circuit length. , And a parameter value indicating the transmission cable length is initialized.

  Then, in the track circuit fault site identification device 20, the power transmission end voltage, the power transmission end current, and the power reception end voltage of the AC signal in the track circuit 10 are continuously measured by the measuring units 21 to 23 whenever necessary. The power transmission end voltage value Vs, power transmission end current value Is, and power reception end voltage value Vr thus obtained are transferred from the measurement units 21 to 23 to the analysis unit 24, and in the analysis unit 24, the measurement data collection unit 25 measures the measurement data storage unit. 26. At that time, after the power transmission end impedance Zs and the train presence line information Tr are calculated, the time t at which the measured values Vs, Is, and Vr are acquired and the measured values Vs, Is, Zs, Vr, and Tr are set as set data. At the same time, the data is stored in a searchable data storage format using the time t and the train line information Tr as keys.

  When the track circuit 10 fails while the track circuit 10 and the track circuit fault location specifying device 20 continue to operate, the track circuit fault location specifying device 20 is operated by operating the input device. The normal part initial stage, the normal end stage and the failure time are input, and the execution of the failure part specifying process is instructed. After receiving this instruction, the analysis unit 24 of the track circuit fault site identification device 20 automatically performs processing, and the accumulated data held in the measurement data storage unit 26, that is, the time t, the power transmission end voltage value Vs, and the power transmission end. A fault location of the track circuit 10 is estimated from a large set of the set data of the current value Is, the power transmission end impedance Zs, and the train line information Tr.

  That is, the normal characteristic value calculation means 27 extracts the normal measurement values Vr and Zs from the accumulated data in the measurement data storage unit 26 and summarizes them into representative values. Then, the in-line reference impedance Za and the in-line reference impedance Zab, reference impedance ratio Zc, absent line reference reception voltage Vd, and standing line reference reception level Ve are calculated. Further, the measured value Vr and Zs at the time of failure are extracted from the accumulated data of the measured data storage unit 26 by the failure characteristic value calculation unit 28 and are collected into representative values, and the calculated value of the normal characteristic value calculation unit 27 The absence line transmission impedance Zg, the transmission impedance ratio Zh, the absence line reception level Vi, and the presence line determination reception level Vj are calculated.

Further, after the case classification based on the presence or absence of the resonance capacitor C is performed by the case classification determination unit 29, the transmission impedance ratio Zh, the absence line reception level Vi, the presence line determination reception level Vj, and the presence line reference reception level Ve Case classification is also performed based on the transmission impedance ratio Zh and the reference impedance ratio Zc, and in addition to which one of the transmission cable 12, the rail 14, and the reception cable 16 has failed in the track circuit 10, is it a disconnection or a short circuit? Such a failure state is also determined.
In this way, the failure portion of the track circuit 10 is specified by being divided into the transmission cables 12 and 16 or the rail 14 although it is estimated, and presented to the output device.

In addition, the estimated accuracy of the faulty part was as good as close to 75% when confirmed for a number of sections on the track of standard construction laid in the Tokyo metropolitan area. The track structure of the rail 14 was good whether it was a bar without a branch, a single branch without an impedance bond, a single branch with an impedance bond, a single branch of a series track, or a sheath that branched on both sides. . In addition, when the length of the rail 14 is in the range of 50 m to 600 m, the length of the cable 12 is in the range of 50 m to ² km, and the cross-sectional area of the cable electric wire is in the range of 1.25 mm ^{2 to} 10 mm ² , the failure site is estimated. It was confirmed that the accuracy was good.

  A specific configuration of the track circuit fault site identification device according to the second embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a block diagram showing the overall structure of the track circuit fault site identification device 40.

  The track circuit fault site specifying device 40 is different from the track circuit fault site specifying device 20 of the first embodiment described above in order to extend the track circuit fault site specifying target not only to one section of the rail 14 but also to many sections. , A point where one measurement unit 21-23 is provided for each target section, and a point where aggregation devices 41 that collect data of measurement results from several measurement units 21-23 are dispersed and installed as appropriate. The function is expanded so that data accumulation and failure part identification processing can be performed for a number of sections, and the analysis unit 24 becomes the device analysis unit 44, and is transmitted from a plurality of aggregation devices 41 via the communication line 42. All the collected data that arrives is delivered to the analysis unit 44. Such functional expansion makes it suitable for practical use.

[Others]
In the above-described embodiment, an AC signal that is a train detection signal of a track circuit is used as a target for measuring voltage and current, but a failure site identification signal different from the train detection signal discriminated from the train detection signal is used. In that case, a generation / transmission circuit and a discrimination reception circuit for a failure part specifying signal are added and arranged in parallel in the measurement units 21 to 23.
In the above embodiment, the measurement data collection means 25 has completed the calculation of the power transmission end impedance Zs and the train presence line information Tr after the data collection. The characteristic value calculating unit 28 may perform the calculation before calculating the reference impedance ratio Zc and the transmission impedance ratio Zh.

  The track circuit fault site identification device according to the present invention is not limited to the track circuit (SMET) described above, but can be easily applied to a commercial track circuit / frequency division track circuit by performing minor corrections such as a threshold change. -It can also be applied to AC track circuits such as frequency-dividing track circuits and DC track circuits.

10 ... Track circuit, 11 ... Transmitter,
12 ... Transmitting cable, 13 ... Impedance bond, 14 ... Rail,
15 ... impedance bond, 16 ... receiving cable, 17 ... receiving section,
20 ... Track circuit fault site identification device,
21 ... Transmitting end voltage measuring unit, 22 ... Transmitting end current measuring unit,
23 ... Receiving end voltage measurement unit, 24 ... Analysis unit, 25 ... Measurement data collection means,
26: Measurement data storage unit, 27: Normal characteristic value calculation means,
28 ... failure characteristic value calculation means, 29 ... case classification determination means,
40 ... Track circuit failure site identification device,
41 ... Aggregation device, 42 ... Communication line, 44 ... Analysis unit,
C: Resonance capacitor, Vs: Transmission end voltage value, Is: Transmission end current value,
Zs: power transmission end impedance, Vr: power reception end voltage value,
Tr: Train presence line information, Za: Reference impedance at the time of presence line,
Zb: reference impedance at the absence line, Zc: reference impedance ratio,
Vd: Reference reception voltage when there is no line, Ve: Reference reception level when there is a line,
Zg: power transmission impedance during absence line, Zh: power transmission impedance ratio,
Vi: reception level when there is no line, Vj: reception level when there is a line

Claims (3)

  A measurement unit connected to the track circuit to continuously measure the power transmission end voltage and power transmission end current of the track circuit and the power reception end voltage of the track circuit, and the measurement value obtained by the measurement is stored in the measurement data storage unit Normal measurement characteristics to extract the measured value at the time of normal and non-train line from the accumulated data and obtain the reference impedance at the time of unattended line corresponding to the ratio of the voltage value at the transmission end and the current value at the transmission end A value calculation means, and a measured value at the time of a fault and a train absent line is extracted from the accumulated data to obtain a transmission impedance at an unattended line corresponding to a ratio between a transmission end voltage value and a transmission end current value and the absent line A failure characteristic value calculating means for obtaining a transmission impedance ratio corresponding to a ratio with a time reference impedance; and a transmission cable disconnection of the track circuit based on a magnitude of the transmission impedance ratio and a threshold value. And in that track circuit failure area specifying device and a divided discriminating means In determining the rail break and reception cable break and short-circuit fault.   The normal characteristic value calculating means extracts a measured value at a normal time and a train absent line from the accumulated data to obtain a reference reception voltage at the time of the absent line corresponding to a power receiving end voltage value, and the characteristic value at the time of the failure The calculating means extracts the receiving end voltage value at the time of failure and when the train is absent from the accumulated data, and obtains the reception level at the time of the track circuit failure corresponding to the ratio of the reference reception voltage at the time of the absence line, 2. The track according to claim 1, wherein when the case determining unit determines that a short circuit failure has occurred, a rail short circuit of the track circuit is further determined based on a magnitude of the reception level at the time of the track circuit failure and a threshold value. Circuit fault location device.   The normal characteristic value calculating means extracts a measured value at normal time and when the train is on the line from the accumulated data to obtain an on-line reference impedance corresponding to the ratio between the transmission end voltage value and the transmission end current value and A reference impedance ratio corresponding to a ratio with a reference impedance at the time of standing, and the track circuit based on the magnitude of the power transmission impedance ratio and the reference impedance ratio when the case classification determination unit determines that a short-circuit fault has occurred The track circuit fault site identification device according to claim 2, wherein the rail short circuit, the transmission cable short circuit, and the reception cable short circuit are discriminated.

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