JP5455745B2 - Abnormal rail identification device - Google Patents

Description

  The present invention relates to an apparatus for detecting a rail abnormality such as a break for a rail laid on a railroad track, and more specifically, an abnormal rail specification for specifying an abnormal rail from a plurality of rails arranged side by side. Relates to the device.

  As a conventional apparatus for detecting a rail abnormality, an apparatus for determining a failure section using a track circuit has been developed (see, for example, Patent Document 1). This failure section determination device transmits a monitor signal from the transmission end to the track circuit through impedance bonds installed at both ends of the section of the track circuit, receives the monitor signal at the reception end, and tracks according to the reception state. It is determined whether or not there is a failure such as disconnection or short circuit in the section from the transmission end to the reception end of the circuit. In addition, the common use of the monitor cable reduces the labor for cable installation, and the failure section and the failure cable are specified by switching the connection destination of the monitor transmitter and the monitor receiver.

Japanese Utility Model Publication No. 3-50583

However, in such a conventional apparatus, it is not known which of the pair of rails included in the track circuit has become abnormal. In addition, it cannot be used where a track circuit device is not installed, and in recent railway technology, the trend of eliminating track circuits is increasing due to the progress of wireless and high-frequency train detection methods.
For this reason, it is required to investigate whether or not there is an abnormality in a plurality of rails arranged side by side, and to specify an abnormal rail when an abnormality is detected.
Therefore, it is a technical problem to realize an abnormal rail identification device that detects abnormalities in parallel running rails and identifies abnormal rails.

  The abnormal rail identification device of the present invention (Solution 1) was created in order to solve such a problem, and three or more transmitters for sending an inspection signal and three or more rails were installed in parallel. A transmission destination switching means for switching a transmission destination rail of the inspection signal connected to the multiple rails at one end side of an inspection section related to the multiple rails, and a section connected to the multiple rails and defining the other end side of the inspection sections The state of the multiple rails is normal based on the detection values of the end demarcation means, the detection part for detecting the physical quantity related to the inspection signal, and the detection part obtained during one cycle of switching by the transmission destination switching means And a determination unit that identifies an abnormal rail when it is determined that there is an abnormality.

  Moreover, the abnormal rail identification device of the present invention (Solution means 2) is the abnormal rail identification device of the above-mentioned solution means 1, and the switching at the transmission destination switching means selects two or more from the multiple rails. The union of the destination rails when the rail is included in the destination rail and when the rail is included in the destination rail and when it is not included during the switching cycle for all the multiple rails Is determined to be all rails excluding the rail from the multiple rails, and the determination by the determination unit is normal even once among the multiple rails during the switching in the transmission destination switching unit. If there is a rail that has not been identified as an abnormal rail, it is designated as an abnormal rail.

  Furthermore, the abnormal rail specifying device of the present invention (solving means 3) is the abnormal rail specifying device of the above-mentioned solving means 1, wherein the switching at the transmission destination switching means selects two from the multiple rails and Included in the transmission destination rail is a round by performing all the combinations of the two selections, and the determination by the determination unit is performed while the switching by the transmission destination switching unit makes a round If there is a rail that has never been determined to be normal, the rail is regarded as an abnormal rail.

  Further, the abnormal rail identification device of the present invention (solving means 4) is the abnormal rail identification device of the above-mentioned solving means 2 and 3, wherein the abnormal rail identification in the determination unit is switched by the transmission destination switching means. If a rail that has been determined to be normal at least once during one round is left out of the multiple rails, any rail that remains is regarded as an abnormal rail.

  Further, the abnormal rail specifying device of the present invention (solving means 5) is the abnormal rail specifying device of the above-mentioned solving means 1 to 4, wherein the section end defining means connects the multiple rails for propagation of the inspection signal. Inspection signal propagation end short-circuit means for short-circuiting at a location, and the detection unit is provided near the one end side of the inspection section together with the transmitter, and detects a physical quantity suitable for impedance calculation of the transmission destination rail from the inspection signal According to another aspect of the present invention, the determination unit determines whether each transmission destination rail is right or wrong according to the calculated impedance value.

  Further, the abnormal rail specifying device of the present invention (solving means 6) is the abnormal rail specifying device of the above solving means 1 to 4, wherein the section end demarcating means is synchronized with the switching at the transmission destination switching means. A receiver switching unit that switches a reception rail of the inspection signal to match the transmission destination rail, and the detection unit receives the inspection signal from the reception rail via the reception destination switching unit. The determination unit performs correct / incorrect determination for each transmission destination rail according to the reception level of the inspection signal at the receiver.

  Further, the abnormal rail specifying device of the present invention (solving means 7) is the abnormal rail specifying device of the above-mentioned solving means 6 and controls switching at the transmission destination switching means and switching at the reception destination switching means. A rail selection means is provided near the other end side of the inspection section together with the determination unit, and the control for the reception destination switching means is performed by wire, but the control for the transmission destination switching means is performed wirelessly. It is characterized by that.

  In such an abnormal rail identification device of the present invention (Solution 1), the inspection signal is transmitted from the transmitter to the inspection section of the multiple rails, and propagates from one end side to the other end side of the section, By reaching the other end section end demarcation means, it will reflect the rail condition that covers the entire inspection section, but the transmission of the inspection signal, which is an electrical signal, requires two or more rails, so the destination switching By means, a plurality of rails are selected from the multiple rails as inspection signal transmission destination rails, and combinations of rails included in the transmission destination rails are successively changed. The physical quantity related to the inspection signal is detected by the detection unit at any time or at least every time the transmission destination rail is switched, and based on the detection value of the detection unit obtained while the transmission destination rail is switched once by the transmission destination switching means. The determination unit determines whether the state of the multiple rails is normal or abnormal.

As described above, since a plurality of rails are included in the transmission destination rail, it is not possible to determine whether each rail is correct or not only by discrimination for each transmission destination rail, but in the present invention, it is included in the transmission destination rail. Because detection and discrimination are performed while switching the combination of rails, it is possible to subdivide the discrimination results based on the difference in the rails that were rearranged during one cycle of destination rail switching. Since the correct / incorrect state can be divided into individual rails, when there is an abnormality, the determination unit identifies the abnormal rail.
Therefore, according to the present invention, it is possible to realize an abnormal rail identifying device that detects abnormalities in parallel rails and identifies abnormal rails.

Moreover, in the abnormal rail identification device of the present invention (solution means 2), if there is only one abnormal rail, the identification is surely performed.
Furthermore, in the abnormal rail identification device of the present invention (Solution means 3), after adopting the basic signal propagation mode of selecting two parallel running rails and transmitting the inspection signal, the solving means 2 Since it is embodied, it is suitable for practical use.
Moreover, in the abnormal rail identification device of the present invention (solution 4), the procedure for identifying the abnormal rail is more specific.

In the abnormal rail identification device of the present invention (solution 5), whether the rail state is correct or not is determined based on the change in the impedance of the rail, but voltage and current are representative examples of physical quantities suitable for impedance calculation. There is a section end demarcation means installed on the other end side of the inspection section that short-circuits many rails at the connection point for propagation of the inspection signal, so that not only voltage but also current can be detected on the inspection signal transmission side. it can. And since the detector is installed near the one end of the inspection section together with the transmitter, the wiring for detection and processing of inspection signals and the wiring for switching control of the transmission destination switching means are located on one end of the inspection section. Aggregated.
In addition, the section end demarcating means that suffices if the rail is short-circuited for propagation of the inspection signal can be easily realized even in a mode in which no control signal is supplied unlike the switching means.
Therefore, long cable wiring comparable to the total length of the inspection section is not necessary.

  Moreover, in the abnormal rail identification device of the present invention (solution means 6), the transmission destination rail and the reception destination rail are matched by the transmission destination switching means and the reception destination switching means. The rail state can be determined based on whether the rail state is correct or not, but since the inspection signal is received by the receiver at the other end of the inspection section, the rail state in the entire inspection section is accurately reflected in the detection value. Wherever an abnormality such as a break occurs in the inspection section, it is reliably detected without being overlooked. The reception level can be easily detected because it is sufficient to measure either voltage or current as a physical quantity related to the inspection signal.

  In the abnormal rail identification device of the present invention (solution 7), wiring for detection and processing of inspection signals is required among the transmission destination switching means and the reception destination switching means that require the supply of control signals. The receiver switching means close to the receiver and the determination unit are controlled by wire, and the transmission destination switching means far from the receiver and the like are controlled wirelessly. Long cable wiring comparable to the total length is not required.

It is a block diagram which shows the structure of the basic abnormal rail identification device which implemented the level change detection system about Example 1 of this invention. (A) to (e) are examples of discrimination data, aggregated data, and abnormal rail identification results. It is a block diagram which shows the structure of the basic abnormal rail identification device which implemented the impedance change detection system about Example 2 of this invention. It is a block diagram which shows the structure of the practical abnormal rail identification device which actualized the impedance change detection system about Example 3 of this invention. (A) to (e) are examples of discrimination data, aggregated data, and abnormal rail identification results. It is a block diagram which shows the structure of the deformable abnormal rail identification device which implemented the impedance change detection system about Example 4 of this invention. It is a block diagram which shows the structure of the practical abnormal rail identification device which implemented the level change detection system about Example 5 of this invention. It is a block diagram of the control judgment part.

About the abnormal rail identification apparatus of such this invention, the specific form for implementing this is demonstrated by the following Examples 1-5.
The embodiment 1 shown in FIGS. 1 and 2 embodies the above-described solving means 1 to 4 and 6 (claims 1 to 4 and 6 at the beginning of the application), and the embodiment 2 shown in FIG. The third embodiment shown in FIGS. 4 to 5 embodies the above-described solving means 1 to 5 (claims 1 to 5 at the beginning of the application), and the fourth embodiment shown in FIG. The solutions 1 to 2 and 4 to 5 (claims 1 to 2 and 4 to 5 at the beginning of the application) are embodied, and the fifth embodiment shown in FIGS. 7 to 8 includes the solutions 1 to 4 described above. , 6-7 (claims 1-4 and 6-7 at the beginning of the application).

  The abnormal rail identification device 10 of the present invention shown in the block diagram in FIG. 1 embodies a level change detection method, and detects breakage of three multiple rails A to C arranged in parallel on a railroad track. It is a basic one that is targeted.

The abnormal rail identifying apparatus 10 includes a transmitter 11, a transmission destination switching unit 12, a reception destination switching unit 13 (section end defining unit), a receiver 14 (detection unit), an A / D converter 15, and a control determination unit 20. It is with.
The control determination unit 20 may be embodied by an individually designed logic circuit or the like. However, a programmable or easy-to-use general-purpose or fail-safe microprocessor system or sequencer is adopted, and control means 21 to 22 (controls) described below are used. Section) and determination means 23 to 29 (determination section) are installed.

  The transmitter 11 may have the same configuration as the conventional track circuit power supply, track circuit transmitter, or monitor transmitter as long as it can send inspection signals from the two output terminals, or may have another configuration. The inspection signal propagates on the multiple rails A to C while maintaining a level that can be detected from one end side to the other end side of the inspection section, and has a frequency that can be identified from noise due to train current. The voltage and frequency are also arbitrary as long as they do not hinder signal detection, train control, etc. For example, a frequency of about 120 Hz that can be easily distinguished from noise of train current is adopted. A simple sine wave signal may be used, and modulation and encoding can be used if the receiver 14 can demodulate and decode the signal.

  The transmission destination switching means 12 is a switching circuit having two input terminals and three output terminals. For example, the transmission destination switching means 12 is embodied by combining two switches with one input and two outputs, and each input terminal is an output terminal of the transmitter 11. The output terminals are connected to the multiple rails A to C on a one-to-one basis on one end side of the inspection section related to the multiple rails A to C, respectively. And it receives the switching control signal (illustrated by a long broken line) of the control means 21 to 22 of the control determination unit 20 and switches the destination rail of the inspection signal output from the transmitter 11 in the multiple rails A to C accordingly. It is like that. Each switch may be mechanical, semiconductor, or relay as long as the electric circuit can be switched.

  The receiving destination switching unit 13 is a section end demarcating unit that is connected to the multiple rails A to C and demarcates the other end side of the inspection section related to the multiple rails A to C. In this embodiment, the receiving destination switching unit 13 12 and a switching circuit of 3 inputs and 2 outputs corresponding to the input / output in the opposite direction is adopted, and the input terminals of the switching circuit are respectively paired to the multiple rails A to C on the other end side of the inspection section related to the multiple rails A to C. In addition, the output terminals of the switching circuit are connected to the input terminals of the receiver 14 on a one-to-one basis, so that the inspection signal receiving rails are switched within the rails A to C. Similarly to the transmission destination switching unit 12, the above-described switching control signal is received, and accordingly, the inspection signal reception destination rail is switched to coincide with the transmission destination rail in synchronization with the switching at the transmission destination switching unit 12. It has become.

  The receiver 14 receives the inspection signal from the receiving rails among the multiple rails A to C via the receiving destination switching means 13 in order to function as a detection unit that detects a physical quantity related to the inspection signal. Yes. In addition, an appropriate band pass filter, envelope detection circuit, and the like are provided, and the reception level is detected as a physical quantity related to the inspection signal. Further, the detected value obtained by the above process is digitized by the A / D converter 15 or the like so as to be easily processed by the control determination unit 20 and then sent to the control determination unit 20.

  The control units 21 to 22 generate selection control data 21 that defines only two rails out of a subset of the multiple rails A to C, and generate a switching control signal while referring to the selection data 21 to transmit the destination switching unit 12. And the rail selection means 22 of the program to be sent to the reception destination switching means 13 by wire, and switching repeatedly selecting the rail A, B and rail B, C and rail C, A in order as the transmission destination rail and the reception destination rail. A control signal is generated to control transmission destination rail switching at the transmission destination switching means 12 and reception destination rail switching at the reception destination switching means 13.

  With such a switching control signal, the switching at the transmission destination switching means 12 is completed by selecting two of the multiple rails A to C and including them in the transmission destination rail for all combinations of the two selections. Become a thing. In addition, when two or more rails A to C are selected and included in the transmission destination rail, and when each rail of the multiple rails A to C is included in the transmission destination rail during the switching cycle, it is not included The condition that the union of the destination rails when there is and does not include all the rails A to C excluding the rails is also satisfied. Further, the switching at the receiving destination switching means 13 is synchronized with the switching at the sending destination switching means 12 so that the receiving rail for the inspection signal and the transmitting destination rail for the inspection signal coincide.

  In the determination means 23 to 29, the states of the multiple rails A to C are normal based on the detection values at the receiver 14 obtained while the switching at the transmission destination switching means 12 and the reception destination switching means 13 is completed. In order to function as a determination unit that identifies an abnormal rail when it is determined whether or not it is abnormal, the detection value input means 23, the detection data 24, and the state determination means embodied by a program and data 25, determination data 26, normal rail exclusion means 27, aggregated data 28, and abnormal rail identification means 29.

  The detection value input means 23 is a program for inputting the detection value of the reception level of the inspection signal received by the receiver 14 via the A / D converter 15 and storing and holding it in the detection data 24. The detection data 24 can be switched by changing the storage area of the detection values when the transmission destination rail and the reception rail are the rails A and B, the rails B and C, and the rails C and A. The received level detection value is held over the course of switching by means 12.

  The state discriminating means 25 compares the detection threshold value of the detection data 24 with a lower limit threshold value preliminarily determined for correctness based on design specifications, actual measurement data, etc., and the received level detection value exceeds the threshold value. For example, it is determined that the transmission destination rail selected when the reception level detection value is obtained is normal, and if the detection value is below the threshold value, it is determined that the corresponding transmission rail is abnormal. This is a program for storing the results in the discrimination data 26. Similar to the detection data 24, the determination data 26 has different determination result storage areas depending on whether the transmission destination rail and the reception rail are the rails A and B, the rails B and C, and the rails C and A. As a result, the determination result is held while the switching at the transmission destination switching means 12 is completed.

  The normal rail excluding means 27 first clears the aggregated data 28 to which the storage area is allocated corresponding to each of the multiple rails A to C, and then makes the normality among the discrimination results held in the discrimination data 26. This is a program that marks the storage area of the aggregated data 28 allocated to each rail included in the receiving destination rail at the time of detection of the receiving level that is the basis of the determination. In the specific example shown in the figure, in this case, normal “O” only when the destination rail and the destination rail are rails C and A, and the other is abnormal “X”. Rail C is marked with “◯” and rail B is not marked.

Such normal rail excluding means 27 marks the rails that have been determined to be normal at least once among the many rails A to C during the cycle of switching at the transmission destination switching means 12, and at the transmission destination switching means 12. Of the multiple rails A to C, the rail that has never been determined to be normal is left unmarked during one round of switching.
The abnormal rail specifying means 29 is checked by examining the aggregated data 28 when a series of processes by the normal rail excluding means 27 is completed, and excluding a number of rails marked as normal “O” from the rails A to C. If there is any remaining rail, the program is such that it is identified as an abnormal rail (rail B in the example illustrated by “↓ B”).

  About the abnormal rail identification apparatus 10 of this Example 1, the use aspect and operation | movement are demonstrated referring drawings. 2A to 2E are data examples in which the discrimination data 26, the aggregated data 28, and the identification result (29) of the abnormal rail identification unit 29 are combined.

  The abnormal rail identification device 10 detects a rail abnormality such as a rail break by propagating an inspection signal to the inspection section of the multiple rails A to C when the train does not enter the inspection section of the multiple rails A to C. Because it is, it is operated only when it is known that the train has not entered the inspection section of the many rails A to C, or it is always operated and only the determination result when the train does not enter is adopted. , And so on.

  When the abnormal rail identification device 10 is activated when the train is not approaching, the rail pair A, B and the rail pair B, C and the rail pair are sequentially selected as the transmission destination rail and the reception destination rail from among the multiple rails A to C. C and A are selected, and for each rail pair, an inspection signal is transmitted from one end side, and the inspection signal propagated through the inspection section is received by the receiver 14 at the other end side, and the reception level is detected. Then, the detected value is accumulated in the detection data 24 by the detected value input means 23, and the correctness state of the detected value is determined by the state determining means 25.

  When the selection switching of each rail pair makes a round for a subset of the two rails in the multiple rails A to C, the discrimination data 26 stores the discrimination results of the transmission destination rail and the reception destination rail. The rails that have been determined to be normal at least once among -C are marked with a normal "O", and the rails that have never been determined normal among the many rails A-C are not marked, as such The rail that remains unmarked is specified as an abnormal rail by the abnormal rail specifying means 29.

More specifically, when the multiple rails A to C are all normal (see FIG. 2A), the rail pair A, B, the rail pair B, C, and the rail pair C, A are both. Since the rails A, B, and C are marked as normal “O” because they are determined to be normal “◯”, there is no rail that remains unmarked, and therefore a determination result that there is no abnormal rail is issued. .
On the other hand, when an abnormality such as a break occurs only in the rail A (see FIG. 2B), the rail pair A, B and the rail pair C, A are determined as abnormal “x”, and the rail pair B, C Is determined to be normal “◯”, and rail B and rail C are normally marked “◯”, but rail A remains unmarked, and therefore rail A is identified as an abnormal rail.

Further, when an abnormality such as a break occurs only in the rail B (see FIG. 2C), the rail pair A, B and the rail pair B, C are determined to be abnormal “x”, and the rail pair C, A is normal. Since it is determined as “◯”, the rail A and the rail C are normally marked “◯”, but the rail B remains unmarked, so that the rail B is specified as an abnormal rail.
Further, when an abnormality such as a break occurs only in the rail C (see FIG. 2D), the rail pair B, C and the rail pair C, A are determined to be abnormal “x”, and the rail pair A, B is normal. Since it is determined as “◯”, the rail A and the rail B are normally marked “◯”, but the rail C remains unmarked, so that the rail C is specified as an abnormal rail.

If an abnormality occurs in a plurality of rails, the illustration is omitted. However, since all of the many rails A to C are abnormal rails, the abnormal rails cannot be specified, but the abnormality is not overlooked. Therefore, the abnormal rail identification device 10 can be used with peace of mind.
In addition, while the switching at the transmission destination switching unit 12 makes a round with respect to the subset of the two rails in the multiple rails A to C, any of the transmission destination rail and the reception destination rail is determined to be abnormal “x”. In an unexpected situation where both rail A, rail B, and rail C are normally marked as “◯” and there is no rail left unmarked (see, for example, FIG. 2E), the occurrence is temporary. The case is ignored, but if it is continuous, an alarm such as a device failure is issued.

  The abnormal rail identification device 30 of the present invention, whose block diagram is shown in FIG. 3, embodies an impedance change detection system, and is basically used for detecting breakage of three rails A to C arranged in parallel. Is something.

  This abnormal rail specifying device 30 is different from the above-described abnormal rail specifying device 10 of the first embodiment in a portion modified for changing from the level change detection method to the impedance change detection method. Specifically, the receiving destination switching means 13 (section end defining means) is an inspection signal propagation end short-circuit means 33a (section end defining means), and the receiver 14 (detection unit) is a voltmeter 34a and current. The detection point input means 23, the detection data 24, and the state determination means 25 are the detection value input means 33, the detection data 34, and the state determination means 35, respectively. It is different.

  The inspection signal propagation end short-circuit means 33a is a section end defining means that is connected to the multiple rails A to C and defines the other end side of the inspection section related to the multiple rails A to C, as in the above-described embodiment. In this embodiment, three band-pass filters (BPF) that pass inspection signals but do not pass signals of other frequencies are employed, one end of each BPF is commonly connected by star connection, and the other ends are a plurality of rails A to C. As for the propagation of the inspection signal, the multiple rails A to C are short-circuited at the connection location, but other signals such as the train detection signal of the track circuit are not short-circuited. Such a test signal propagation end short-circuit means 33a is not connected to the control determination unit 20 with a cable because there is no need to transmit a switching control signal from the control determination unit 20 because each BPF can be composed of only passive elements. It has become a thing. If there is no track circuit, a short-circuit wire is acceptable.

  The voltmeter 34a and the ammeter 34b are connected to the output terminal and output line of the transmitter 11 so that the voltage and current of the inspection signal output from the transmitter 11 can be measured. A detection unit is provided near the side and detects a physical quantity suitable for impedance calculation of the transmission destination rail from the inspection signal. Note that the voltage value measured by the voltmeter 34a and the current value measured by the ammeter 34b are both digitized by the A / D converter 15 and taken into the control determination unit 20 in the same manner as the signal level detection value described above. Although two A / D converters 15 are illustrated, the voltage value and the current value may be converted with a time difference by switching one.

The detection value input means 33 follows the above-described detection value input means 23 except that two sets of voltage values and current values are input as detection values.
The detection data 34 is obtained by expanding the detection data 24 described above into two sets for holding a voltage value and holding a current value.
Prior to the state determination, the state determination unit 35 calculates the impedance from the voltage value and the current value, and determines whether or not each transmission destination rail is correct / incorrect according to the calculated impedance value. The means 25 is followed.

  In this case, when the abnormal rail specifying device 30 is activated when the train is not approaching, the rail pair A, B and the rail pair B, C and the rail pair C, A are sequentially selected as the transmission destination rails from the multiple rails A to C. Is selected, and each selected rail pair forms an electrical circuit that is folded back by the inspection signal propagation end short-circuit means 33a on the other end side of the inspection section for the inspection signal. For each such rail pair, one end of the inspection section is formed. The inspection signal is transmitted from the side, and the voltage and current of the inspection signal are detected by the voltmeter 34a and the ammeter 34b, and are input to the control determination unit 20 by the detection value input means 33 and detected data 34 Is stored in memory. Further, the state determination means 35 calculates the impedance of each rail pair and determines whether the rail is correct.

  Then, when the selection switching of each rail pair makes a round for a subset of the two rails in the multiple rails A to C, the determination result of the destination rail is accumulated in the determination data 26, and in the aggregated data 28, the multiple rails A to C are stored. Rails that have been identified as normal at least once are marked with “O”, and rails that have never been identified as normal among the many rails A to C are not marked, and are not marked as such. The remaining rail is specified as an abnormal rail by the abnormal rail specifying means 29.

  Thus, in this case as well, rail abnormality detection and abnormal rail identification are accurately performed, but the abnormal rail identification device 30 is an impedance change detection system, and therefore, for example, the upper limit value and the lower limit value are set as threshold values in the state determination means 35. If the calculated impedance value exceeds the upper limit, it is determined that the rail is broken, and if the calculated impedance value is lower than the lower limit, it is determined that the rail is short-circuited. .

  The abnormal rail identification device 40 of the present invention, whose block diagram is shown in FIG. 4, embodies an impedance change detection method, and is practical for using four rails A to D arranged side by side as break detection targets. Is something. On many tracks, a total of four rails run in parallel on the up and down lines.

  The difference between the abnormal rail specifying device 40 and the abnormal rail specifying device 30 of the second embodiment described above is a modification corresponding to the addition of the rail D to the fracture detection target. Specifically, the destination switching means 12 is the transmission destination switching means 42, the inspection signal propagation end short-circuit means 33a is the inspection signal propagation end short-circuit means 43 (section end defining means), the selection data 21, and the rail selection means 22 , Detection value input means 33, detection data 34, state determination means 35, determination data 26, normal rail exclusion means 27, aggregated data 28, and abnormal rail identification means 29 are selected data 51, rail selection means 52, detection value input means, respectively. 53, detection data 54, state determination means 55, determination data 56, normal rail exclusion means 57, aggregated data 58, and abnormal rail identification means 59. .

In the transmission destination switching means 42, the number of input terminals connected to the transmitter 11 remains two, but the number of output terminals connected to the multiple rails A to D on a one-to-one basis increases by one for the rail D to four. It has become. And according to the switching control signal (illustrated with a long broken line) of the control means 51-52 of the control determination part 20, the transmission destination rail of an inspection signal is switched within many rails AD.
The inspection signal propagation end short-circuit means 43 has four band-pass filters (BPFs) that pass inspection signals but not signals of other frequencies. It is a short circuit.

  The control means 51 to 52 select the selection data 51 that defines all of the subsets of the multiple rails A to D and only the two rails, and generate a switching control signal while referring to the selection data 51, and switch destinations. Rail selection means 52 for a program to be sent to the means 42 by wire, and as a destination rail, rail pair A, B, rail pair A, C, rail pair A, D, rail pair B, C, rail pair B, D A switching control signal for repeatedly selecting the rail pair C and D is generated, and the switching of the transmission destination rail in the transmission destination switching means 42 is controlled.

  The detection value input means 53, the detection data 54, the state determination means 55, the determination data 56, the normal rail exclusion means 57, the aggregated data 58, and the abnormal rail identification means 59 are cycled through the switching of the transmission destination rail by the transmission destination switching means 42. Although the number of data and the number of determinations increase corresponding to the increase in the number of rail combination patterns selected between 3 to 6, the others are the same as those in the first or second embodiment (21, 21). 22, 33, 34, 35, 26, 27, 28, 29).

About the abnormal rail identification apparatus 40 of this Example 3, the use aspect and operation | movement are demonstrated referring drawings. 5A to 5E are data examples in which the discrimination data 56, the aggregated data 58, and the specification result (59) of the abnormal rail specifying means 59 are combined.
In this case as well, the operation is performed only when it is known that the train has not entered the inspection section of the multiple rails A to D, or only the determination result when the train is not operated and is always operated is adopted. , And so on.

  And when the abnormal rail identification device 40 is activated when the train is not approaching, the rail pair A, B, the rail pair A, C and the rail pair A, D as the transmission destination rail from among the multiple rails A to D, Rail pair B, C, rail pair B, D and rail pair C, D are selected, and at the time of selection, each rail pair is turned back by inspection signal propagation end short-circuit means 43 on the other end side of the inspection section. For each such rail pair, an inspection signal is transmitted, the voltage and current of the inspection signal are detected, and impedance calculation and correctness determination are performed.

  Then, when the selection switching of each rail pair makes a round for a subset of the two rails in the multiple rails A to D, the determination result of the transmission destination rail is accumulated in the determination data 56, and in the aggregated data 58, the multiple rails A to D are stored. Rails that have been determined to be normal at least once are marked as “good”, and rails that have never been determined as normal among the many rails A to D are not marked, and are not marked as such. The remaining rail is specified as an abnormal rail by the abnormal rail specifying means 59.

Here again, the cases will be described in detail. When all of the multiple rails A to D are normal (see FIG. 5A), the rail pair A, B and the rail pair A, and C are both the rail pair A. , D and rail pair B, C and rail pair B, D and rail pair C and D are both marked as “good”, so there is no rail left unmarked, so a judgment result is given that there is no abnormal rail. It is.
On the other hand, when an abnormality such as a break occurs only in the rail A (see FIG. 5B), the rail pair A, B, the rail pair A, C, and the rail pair A, D are determined as abnormal “x”. Since the rail pair B, C, the rail pair B, D and the rail pair C, D are determined to be normal “O”, the rail B, the rail C, and the rail D are normally marked “O”. Remains unmarked, rail A is identified as an abnormal rail.

Further, when an abnormality such as a breakage occurs only in the rail B (see FIG. 5C), the rail pair A, B and the rail pair B, C and the rail pair B, D are determined to be abnormal “x”, and the rail Since the pairs A and C, the rail pairs A and D, and the rail pairs C and D are determined to be normal “O”, the rails A, C, and D are marked “O”, but the rail B is marked. Therefore, the rail B is identified as an abnormal rail.
A detailed description that will be repeated is omitted. Similarly, when an abnormality such as a break occurs only in the rail C, the rail C is specified as an abnormal rail, and an abnormality such as a break occurs only in the rail D. The rail D is identified as an abnormal rail.

  Furthermore, when an abnormality such as breakage occurs in the rail A and the rail C (see FIG. 5D), the rail pair A, B, the rail pair A, C, the rail pair A, D, the rail pair B, C, and the rail Since the pair C and D are determined as abnormal “×” and the rail pair B and D are determined as normal “O”, the rail B and the rail D are marked as normal “O”, but the rail A and the rail C Is left unmarked, and rail A and rail C are specified as abnormal rails, so that even a plurality of abnormal rails may be specified. Similarly to the above-described example, in an unexpected situation (see, for example, FIG. 5E), if the occurrence is temporary, it is ignored, but if it is continuous, an alarm such as a device failure is issued.

  The abnormal rail identification device 60 of the present invention whose block diagram is shown in FIG. 6 embodies an impedance change detection method, and while the four rails A to D arranged in parallel are targeted for fracture detection, It is a modification within the practicable range.

  The difference between the abnormal rail identification device 60 and the abnormal rail identification device 40 of the third embodiment described above is that three of the multiple rails A to D are selected as transmission destination rails. In addition, a transmitter 61a that generates a three-phase alternating current inspection signal is introduced in place of the transmitter 11 that has generated a single-phase inspection signal, and a three-input four-output instead of the transmission destination switching means 42. The point that the transmission destination switching means 62a is introduced, the point that the voltmeter 34a and the ammeter 34b are increased to three sets, the selection data 51, the rail selection means 52, the detection value input means 53, the detection data 54, and the state determination Means 55, discrimination data 56, and normal rail exclusion means 57 are selection data 61, rail selection means 62, detection value input means 63, detection data 64, state discrimination means 65, discrimination data 66, normal level, respectively. A point which is Le excluding means 67.

  The control means composed of the selection data 61 and the rail selection means 62 includes a rail set A, B, C, a rail set A, B, D and a rail set A, C, D as a transmission destination rail in order from the multiple rails A to D. Rail sets B, C, and D are selected. Further, the transmission destination switching means 62a switches the connection state in accordance with the switching control signal instructing the selection, so that three rails are selected from the multiple rails A to D and included in the inspection signal transmission destination rail. Yes. In such selection switching, there are cases where the rails of the multiple rails A to D are included in the transmission destination rail during the switching cycle and when they are not included. The union of the transmission destination rails becomes all the rails excluding the rails A to D.

The detection value input means 63 and the detection data 64 in the detection unit are the above-described detections except that each time the transmission destination rail is switched, the voltage and current of the inspection signal are captured and held in sets of three as detection values. The value input means 53 and the detection data 54 are followed.
The state determination means 65, the determination data 66, and the normal rail exclusion means 67 in the determination unit calculate the impedance from the three detection values for each set of three transmission destination rails, and calculate by averaging or using an intermediate value. Except for the fact that the impedance values are integrated into one and then the correct / incorrect state is determined and the normal rail is excluded, the state determination means 55, the determination data 56, and the normal rail exclusion means 57 are followed. Yes.

  Also in the case of such an abnormal rail specifying device 60, when the abnormal rail specifying device 60 operates when the train is not approaching, the rail sets A, B, and C are sequentially set as the transmission destination rails from among the multiple rails A to D. Rail set A, B, D, rail set A, C, D and rail set B, C, D are selected, and at the time of selection, each rail set is an inspection signal propagation end short-circuit means on the other end side of the inspection section. An electric circuit of a shape that is folded back at 43 is formed, and for each such rail set, an inspection signal is transmitted, the voltage and current of the inspection signal are detected, and impedance calculation and correctness determination are further performed.

  Then, when the selection switching of each rail set makes a round for a subset of the three rails in the multiple rails A to D, the discrimination result of the transmission destination rail is accumulated in the discrimination data 66, and the above-described abnormal rail identification is stored in the aggregated data 58. As with the device 40, a normal “O” mark is marked on a rail that has been determined to be normal at least once among the many rails A to D, and a rail that has never been determined to be normal among the many rails A to D. The rails that are not marked and remain so marked are identified as abnormal rails by the abnormal rail identifying means 59.

  The abnormal rail identification device 70 of the present invention whose block diagrams are shown in FIGS. 7 and 8 embodies the level change detection method, and uses the four rails A to D arranged side by side as the break detection target. To be practical.

  This abnormal rail specifying device 70 differs from the above-described abnormal rail specifying device 40 of the third embodiment in that the parts modified for changing from the impedance change detection method to the level change detection method and the radio devices 75 and 76. It is addition of. The remodeling points in changing the detection method are that the section end defining means is changed from the inspection signal propagation end short-circuit means 43 to the receiving destination switching means 73, and the detecting section is changed from the voltmeter 34a and the ammeter 34b to the receiver 14. The detection value input means 53, the detection data 54, and the state determination means 55 are the detection value input means 83, the detection data 84, and the state determination means 85, respectively.

  Further, the abnormal rail specifying device 70 is different from the abnormal rail specifying device 10 of the first embodiment described above in that the break detection target rail is changed from three multi-rails A to C to four multi-rails A to D. And the addition of radio devices 75 and 76. The remodeling point corresponding to the increase in the number of rails is that the transmission destination switching means 12 is the transmission destination switching means 42 and the section end demarcation means is the reception destination switching means 13 to the reception destination switching means 73. The selection data 21, rail selection means 22, detection value input means 23, detection data 24, state determination means 25, determination data 26, normal rail exclusion means 27, aggregated data 28, and abnormal rail identification means 29 are selected data 51, respectively. , Rail selection means 52, detection value input means 83, detection data 84, state determination means 85, determination data 56, normal rail exclusion means 57, aggregated data 58, and abnormal rail identification means 59.

  The receiving destination switching means 73 employs a four-input two-output switching circuit corresponding to the transmitting destination switching means 42 in the opposite direction of input / output, and is connected to multiple rails A to D in the same manner as the receiving destination switching means 13. The other end side of the inspection section related to the multiple rails A to D is demarcated, and the inspection signal receiving destination rail is switched in the multiple rails A to D, and the rail selection means 52 is switched as in the transmission destination switching means 42. In response to the control signal, the inspection signal receiving rail is switched to coincide with the transmission destination rail in synchronization with the switching at the transmission destination switching means 42.

  The detection value input means 83, the detection data 84, the state determination means 85, the determination data 56, the normal rail exclusion means 57, the aggregated data 58, and the abnormal rail identification means 59 are cycled through the switching of the transmission destination rail by the transmission destination switching means 42. The number of data and the number of determinations increase corresponding to the increase in the number of combination patterns of rails selected between 3 to 6 pairs, but other than that of the first embodiment described above (21, 22) 23, 24, 25, 26, 27, 28, 29).

  The wireless devices 75 and 76 may be a general-purpose and inexpensive commercially available low-power wireless device if the switching control signal generated by the rail selection unit 52 can be transmitted from the control determination unit 20 to the transmission destination switching unit 42 by wireless communication. The wireless device 75 is installed near the transmission destination switching means 42, but the wireless device 76 for transmission is installed near the receiver 14 together with the control determination unit 20. In such an abnormal rail identification device 70, the rail selection means 52 for controlling the switching at the transmission destination switching means 42 and the switching at the reception destination switching means 73, together with the determination units 83 to 59, the inspection sections of the multiple rails A to D. Although the control for the receiving destination switching means 73 is performed by wire, the control for the transmission destination switching means 42 is performed wirelessly.

  Also in this case, when the abnormal rail specifying device 70 is operated when the train is not approaching, the rail pair A, B and the rail pair A, C are sequentially selected as the transmission destination rail and the reception destination rail from among the multiple rails A to D. Rail pair A, D, rail pair B, C, rail pair B, D and rail pair C, D are selected, and for each selected rail pair, an inspection signal is transmitted from one end and propagates through the inspection section. After the inspection signal is received by the receiver 14 at the other end side, the reception level is detected, the detection value is accumulated in the detection data 84 by the detection value input means 83, and the correctness state of the detection value is in the state It is discriminated by the discriminating means 85.

When the selection switching of each rail pair makes a round for a subset of the two rails in the multiple rails A to D, the discrimination data 56 accumulates the discrimination results of the transmission destination rail and the reception destination rail. Of the rails A to D, the rails that have been determined to be normal even once are marked with “good”, and among the multiple rails A to D, the rails that have never been determined to be normal are not marked. Thus, if there is a rail that remains unmarked, it is specified as an abnormal rail by the abnormal rail specifying means 59 (rail B in the example shown in FIG. 8 by “↓ B”).
Thus, also in this case, the detection of the rail abnormality and the identification of the abnormal rail are accurately performed.

[Others]
In the above embodiment, execution of the abnormal rail identification process is clearly divided between the state determination means 25, 35, 55, 65, 85, the normal rail exclusion means 27, 57, 67, and the abnormal rail identification means 29, 59. However, such sharing is not essential. A process in which, if there is a rail that has never been determined to be normal among the multiple rails A to C and A to D during a round of switching in the transmission destination switching means 12, 42, 62a, it is set as an abnormal rail. If it is performed, it may not be shared, and other forms of sharing may be used.
In the above embodiment, the threshold value for determining correctness is a simple fixed value, but the threshold value may be a variable value, and may be adjusted according to environmental conditions such as rail temperature and humidity around the track.

In the above embodiment, only one of the level change detection method and the impedance change detection method is embodied, but both methods can be used together, and if the abnormal state is subdivided together, In some cases, a short circuit between rails and a ground fault of the rails can be separated.
Moreover, in the said Example, the control determination part 20 performs control processing of the transmission destination switch means 12,42,62a which switches the inspection signal transmission destination rail, and determination processing based on a detection value, state determination, and abnormal rail specification. However, these processes may be shared by different units.

  The application of the abnormal rail identification device of the present invention is not limited to the above-described line in which three or four rails are arranged in parallel. The abnormal rail identification device of the present invention has five or more rails arranged in parallel. It can also be applied to other lines.

A, B, C, D ... Rail,
10 ... Abnormal rail identification device,
11 ... Transmitter, 12 ... Transmission destination switching means,
13 ... Destination switching means (section end demarcation means),
14 ... Receiver (detection unit), 15 ... A / D converter (input means),
20 ... control determination part (determination part),
21 ... selection data, 22 ... rail selection means, 23 ... detection value input means,
24 ... detection data, 25 ... state discrimination means, 26 ... discrimination data,
27 ... Normal rail exclusion means, 28 ... Aggregated data, 29 ... Abnormal rail identification means,
30 ... Abnormal rail identification device,
33a ... inspection signal propagation end short-circuit means (section end definition means),
34a ... Voltmeter (detection unit), 34b ... Ammeter (detection unit),
33 ... Detection value input means, 34 ... Detection data, 35 ... State determination means,
40. Abnormal rail identification device,
42 ... transmission destination switching means, 43 ... inspection signal propagation end short-circuit means (section end defining means),
51 ... selection data, 52 ... rail selection means, 53 ... detection value input means,
54 ... detection data, 55 ... state determination means, 56 ... determination data,
57 ... Normal rail exclusion means, 58 ... Aggregated data, 59 ... Abnormal rail identification means,
60 ... Abnormal rail identification device,
61a ... transmitter, 62a ... transmission destination switching means, 61 ... selection data,
62 ... Rail selection means, 63 ... Detection value input means, 64 ... Detection data,
65 ... state determination means, 66 ... determination data, 67 ... normal rail exclusion means,
70: Abnormal rail identification device,
73: Receiving destination switching means (section end demarcation means), 75, 76 ... Radio equipment,
83 ... Detection value input means, 84 ... Detection data, 85 ... State discrimination means,

Claims (6)

Transmitter for transmitting inspection signals, and transmission destination switching means for switching the inspection signal transmission destination rail connected to the multiple rails at one end side of an inspection section relating to multiple rails arranged in parallel on three or more railroad tracks And a section end demarcating means connected to the multiple rails to demarcate the other end side of the inspection section, a detection unit for detecting a physical quantity related to the inspection signal, and a cycle of switching by the transmission destination switching means A determination unit that determines whether the state of the multiple rails is normal or abnormal based on the detection value of the detection unit obtained in the step, and identifies an abnormal rail when determining that the state is abnormal. An abnormal rail identification device ,
The switching by the transmission destination switching means selects two or more of the multiple rails and includes them in the transmission destination rail, and the rails are used as the transmission destination rails in one round of switching for all the rails of the multiple rails. The union of the destination rails when there is an inclusion and when it is not included is the entire rail excluding the rail from the multiple rails,
The determination by the determination unit is that if there is a rail that has never been determined to be normal among the multiple rails during a round of switching by the transmission destination switching unit, it is determined as an abnormal rail. abnormal rail particular device you wherein a. Transmitter for transmitting inspection signals, and transmission destination switching means for switching the inspection signal transmission destination rail connected to the multiple rails at one end side of an inspection section relating to multiple rails arranged in parallel on three or more railroad tracks And a section end demarcating means connected to the multiple rails to demarcate the other end side of the inspection section, a detection unit for detecting a physical quantity related to the inspection signal, and a cycle of switching by the transmission destination switching means A determination unit that determines whether the state of the multiple rails is normal or abnormal based on the detection value of the detection unit obtained in the step, and identifies an abnormal rail when determining that the state is abnormal. An abnormal rail identification device ,
The switching at the transmission destination switching means is a round by selecting two from the multiple rails and including them in the transmission destination rail for all combinations of the two selections. The specification is characterized in that if there is a rail that has never been determined to be normal among the multiple rails during a cycle of switching by the transmission destination switching means, it is set as an abnormal rail. abnormal rail specific equipment you. The determination of abnormal rails in the determination unit is abnormal if any rails that have been determined to be normal at least once are left out of the multiple rails during one cycle of switching in the transmission destination switching means. The abnormal rail identification device according to claim 1, wherein the abnormal rail identification device is a rail. The section end defining means is inspection signal propagation end short-circuiting means for short-circuiting the multiple rails at connection points for propagation of the inspection signal, and the detection unit is provided near one end of the inspection section together with the transmitter. A physical quantity suitable for calculating the impedance of the transmission destination rail from the inspection signal, and the determination unit determines whether the transmission destination rail is correct or not according to the calculated impedance value. The abnormal rail identification device according to any one of claims 1 to 3 , wherein: The section end demarcating means is receiving destination switching means for switching the inspection signal receiving destination rail to coincide with the transmitting destination rail in synchronization with the switching at the transmission destination switching means, and the detection unit is configured to receive the receiving signal. A receiver that receives the inspection signal from the destination rail via a destination switching unit, and the determination unit determines whether or not each transmission destination rail is correct according to a reception level of the inspection signal at the receiver. The abnormal rail identification device according to any one of claims 1 to 3 , wherein the abnormal rail identification device is performed. Rail selection means for controlling switching at the transmission destination switching means and switching at the reception destination switching means is provided near the other end side of the inspection section together with the determination unit, and controls the reception destination switching means. 6. The abnormal rail identification device according to claim 5 , wherein said control is performed by wire, but control on said transmission destination switching means is performed wirelessly.

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