JP2006248433A - Train detection apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain size and cost reductions of an apparatus by reducing the number of parts while performing highly efficient signal detection and output switching. <P>SOLUTION: This train detection apparatus includes: a central control section 15 which detects a train detection state from an on-track receiving signal received by a receiving section and supplies a transmission signal indicating a train detection state to a transmission circuit section 22 in a predetermined transmission timing; a single detection circuit 16 for detecting the presence of the transmission signal indicating the train detection state supplied to the transmission circuit section 22 from the central control section 15; and a transmission switching circuit 23 for switching the transmission signal indicating the train detection state detected by the single detection circuit 16, for every track according to a switching signal output from the central control section 15 in response to transmission timing. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a train detection device that switches and transmits a train detection signal indicating that a train exists on a track (present line) for each of a plurality of tracks.

  A general train detection device is provided with a plurality of current transformers by providing a plurality of current transformers for a plurality of track circuits, a transmission point capable of transmitting a train detection signal and a reception point capable of receiving a train detection signal from the transmission point. A signal is taken out for each circuit and a standing line is detected (for example, see Patent Document 1).

  The thing of this patent document 1 has the transmission switching part which switches the transmission point which transmits a transmission part and a train detection signal by a time division, The signal sent to each transmission point from this transmission switching part is transmitted to each transmission part. Extracted by multiple current transformers.

Then, the transmission confirmation unit performs processing such as detection, frequency multiplication, and level verification to detect the occurrence of a failure in the transmission confirmation unit, and the signal received through the trajectory and received at the reception point according to the switching state of the transmission switching unit The output is switched by time division. Moreover, it is the structure provided with the signal processing part which discriminate | determines this train presence line, and the central control part which controls the whole operation | movement.
Japanese Patent Application No. 10-264819

  However, in the conventional train detection device described above, a current transformer is used for each transmission unit, and it is necessary to take out the signal and check whether the train detection signal is sent to the transmission point. There is an inconvenience that the size of the apparatus increases and the cost may increase.

  Therefore, the present invention provides a train detection device that can detect a signal on a line efficiently and perform output switching, reduce the number of parts, reduce the size of the device, and reduce the cost. It is intended to provide.

  In order to solve the above problems and achieve the object of the present invention, the train detection device of the present invention detects a train detection signal from a received signal from a track received by a receiving unit, and transmits a train detection signal. Control means for supplying the transmission part to the transmission part at a predetermined transmission timing, a single detection means for detecting the presence or absence of a transmission signal indicating a train detection signal supplied from the control means to the transmission part, and a single detection Switching means for switching the transmission signal indicating the train detection signal detected by the means for each track by a switching signal output from the control means corresponding to the transmission timing.

  The control means has a switching means for switching the output of the transmission signal indicating the train detection signal for each track in the transmission section, and the transmission section has a single detection means for detecting the presence or absence of the transmission signal indicating the train detection signal The transmission signal indicating the train detection signal can be output for each n tracks from the switching means to the single detection means of the transmission unit.

In addition, the single detecting means detects an abnormal operation or normal operation of the switching means of the transmitting unit by having one current detecting unit and a voltage detecting unit that detect a signal output every n orbits. Thus, failure diagnosis can be performed. Further, by multiplexing the current detection unit and the voltage detection unit which are detection circuits of the transmission unit, it is possible to improve the accuracy of the failure diagnosis of the train detection device.
As specific means, one current transformer CT1 and one voltage detection circuit 17 are provided in the preceding stage of the transmission switching units 19-1 to 19-n shown in FIG. 2, and the relay of the transmission switching unit is time-shared. It is configured to switch.

  According to the train detection device of the present invention, the output switching of the transmission signal indicating the state related to the train detection from the switching unit of the transmission unit is performed, and the state related to the train detection is detected by detecting the presence or absence of the transmission signal by the single detection unit. Detection can be performed for each of a plurality of trajectories. As a detection means for the state relating to the train detection, there is an advantage that a single detection means can be integrated into one current transformer and a voltage detection circuit.

Embodiments of the present invention will be described below with reference to FIGS.
FIG. 1 shows the overall configuration of the train detection device 4. A transmission unit 5 indicated by S1 to Sn that outputs a transmission signal to an orbit 1T, which is one of a plurality of unillustrated orbits, via an insulation balancer (ZB) 2 and the orbit 1T via an insulation balancer (ZB) 3 It is comprised from the receiving part 6 shown by R1-Rn into which a received signal is input.

In FIG. 1, the train detection device 4 configured as described above operates as follows.
In the train detection device 4 shown in FIG. 1, a transmission signal is output from the transmission unit 5 composed of S1 to Sn to the track 1T. This transmission signal is, for example, a train detection signal that detects the presence of a train on the track. For example, a signal of 100 volts and 40 dB is used as a train detection signal for a conventional line, and a signal of 120 to 130 volts, 43 dB, or 150 to 160 volts, 46 dB is used as a train detection signal for a Shinkansen. The reason why the train detection signal of the Shinkansen has a higher voltage value and signal level than the conventional line is due to the loss due to the long track distance.

  In the train detection device 4 shown in FIG. 1, a reception signal is input from the insulation balancer (ZB) on the track 1T to the reception unit 6. This received signal is, for example, a train detection signal indicating the presence of a train on the track. The train acts as a load on the track when it is on the track and shorts between tracks. The train detection device 4 detects the presence of the train on the track by detecting the current and voltage level of the train detection signal on the track at this time. For example, when there is no train on the track, the load on the track is 600 ohms, and this is used as a reference value when there is no track, and the load on the track decreases to 150-50 ohms when the track is on track. The voltage level is a constant value of 10 to 20 volts. The train detection device 4 detects the standing line by detecting the decrease in the load as the current and voltage level of the train detection signal.

FIG. 2 is a block diagram of hardware in the train detection device 4 shown in FIG.
The block configuration of the train detection device 4 shown in FIG. 2 includes a reception circuit unit (11, 12, 13, and 14), a transmission circuit unit 22, and a central control unit (DSP (Digital Signal Processor)). 15, a transmission switching unit 23, a detection circuit 16 provided in the transmission circuit unit 22, and the like.
In the reception circuit section on the reception side, the reception signals input from the isolation transformers 11-1 to 11-n on the input side are attenuated to a level that can be processed by the attenuator circuits (ATT) 12-1 to 12-n. The level-converted signal is converted into a digital signal by the A / D converter 13, and the converted digital signal is subjected to central processing after being subjected to signal processing such as decoding for reception via the reception signal processing unit 14. Input to the unit 15.

The central control unit 5 detects the existing line by detecting the current and voltage level of the train detection signal that is the received signal.
In addition, the central control unit 15 generates a train detection signal, which is a transmission signal transmitted to each track, at each transmission timing and supplies the train detection signal to the transmission circuit unit 22 on the transmission side.

  In the transmission circuit unit 22 on the transmission side, the train detection signal, which is the transmission signal output from the central control unit 15, is converted to a level that can be transmitted by the power transformer (PA-MT) 18, and the level-converted signal is relayed. The signal is insulated at every transmission timing through RY1 and output to the transmission switching unit 23. The relays 19-1 to 19-n of the transmission switching unit 23 are switched for each transmission destination track by a switching signal from the central control unit 15, and the train detection signal that is the transmission signal is switched to each relay 19. -1 to 19-n are transmitted to the track sides S1 to S6 via the insulating transformers 20-1 to 20-6. The switching signal from the central control unit 15 is output corresponding to the transmission timing.

  Here, in the transmission circuit unit 22, the current transformer CT1 and the current are connected to the preceding stage of the relay RY1 that performs system insulation for each track of the transmission destination in response to switching of the relays 19-1 to 19-n of the transmission switching unit 23. One detection circuit 21 and one load and voltage detection circuit 17 are provided. The detection circuit 16 detects the current and voltage level of the train detection signal, which is a transmission signal, by the current detection circuit 21 and the voltage detection circuit 17 and feeds back to the central control unit 15. The central control unit 15 generates a switching signal corresponding to the transmission timing based on the current and voltage level of the train detection signal, and outputs the switching signal to the relays 19-1 to 19-n of the transmission switching unit 23. By this switching signal, the relays 19-1 to 19-n of the transmission switching unit 23 are switched for each track. As described above, the transmission signal can be switched for each of the plurality of tracks by only one current transformer CT1 and current detection circuit 21, one load and voltage detection circuit 17, and its detection circuit 16.

  Further, in the conventional control of the transmission switching unit, a current transformer for each of a plurality of tracks is provided at the subsequent stage of each transmission switching unit, and the current flowing through each switching unit is monitored. On the other hand, in the present embodiment, it corresponds to the transmission timing of each transmission signal detected by only one current transformer CT1 and current detection circuit 21, one load and voltage detection circuit 17 and its detection circuit 16. The switching signal is switched between transmission signals for each of a plurality of trajectories, and the detection circuit 16 indicates that each transmission signal is output for each switching of the transmission signals for each of a plurality of trajectories. It is possible to detect whether the normal operation of the relays 19-1 to 19-n of the transmission switching unit 23 has actually been performed by detecting the drop from the bottom level to the bottom level. In addition, it can be confirmed whether the normal operation | movement of the relays 19-1 to 19-n of the transmission switching part 23 was similarly performed by detecting the received signal corresponding to a transmitted signal in a receiving circuit part.

FIG. 3 is a switching timing chart of the train detection device.
In FIG. 3, the transmission switching unit sets the transmission timing of the message detection signal, the level detection signal, and the relay detection signal output as transmission signals from the transmission circuit unit 22 of the train detection device 4 to the track 1 (1T) to the track 6 (6T). 23 is switched by relays 19-1 to 19-n, the presence detection of the train is detected by the message detection signal and the level detection signal, and the failure of relays 19-1 to 19-n of the transmission switching unit 23 is detected by the relay detection signal An example of detecting detection will be described.

  At the first transmission timing TM1, a telegram detection signal D11 is output from the transmission circuit unit 22 of the train detection device 4 to the track 1 (1T). And it switches to the track 2 (2T) by the relays 19-1 to 19-n of the transmission switching unit 23, and outputs the telegram detection signal D11 from the transmission circuit unit 22 of the train detection device 4 to the track 2 (2T). Next, switching to the track 3 (3T) is performed by the relays 19-1 to 19-n of the transmission switching unit 23, and the level detection signal L13 is output from the transmission circuit unit 22 of the train detection device 4 to the track 3 (3T). Similarly, the relays 19-1 to 19-n of the transmission switching unit 23 are sequentially switched from the track 4 (4T) to the track 6 (6T), and the level detection signal L14 to the level sequentially from the transmission circuit unit 22 of the train detection device 4. The detection signal L16 is output. Thereafter, all the tracks 1 (1T) to 6 (6T) are switched by the relays 19-1 to 19-n of the transmission switching unit 23, and the track 1 (1T) to the track 1 from the transmission circuit unit 22 of the train detection device 4 is switched. The relay detection signal R11 to relay detection signal R16 on the track 6 (6T) are output. The period so far is defined as the first timing. The relay detection signals R11 to R16 at the first transmission timing TM1 are signals for detecting the upper relays among the relays 19-1 to 19-n of the transmission switching unit 23.

  At the next second transmission timing TM2, the level detection signal L21 is output from the transmission circuit unit 22 of the train detection device 4 to the track 1 (1T). Then, switching to the track 2 (2T) is performed by the relays 19-1 to 19-n of the transmission switching unit 23, and the level detection signal L22 is output from the transmission circuit unit 22 of the train detection device 4 to the track 2 (2T). Next, switching to the track 3 (3T) is performed by the relays 19-1 to 19-n of the transmission switching unit 23, and the telegram detection signal D23 is output from the transmission circuit unit 22 of the train detection device 4 to the track 3 (3T). And it switches to the track 4 (4T) by the relays 19-1 to 19-n of the transmission switching unit 23, and outputs the telegram detection signal D24 from the transmission circuit unit 22 of the train detection device 4 to the track 4 (4T). Similarly, the relays 19-1 to 19-n of the transmission switching unit 23 are sequentially switched from the track 5 (5T) to the track 6 (6T), and the level detection signal L25 to the level sequentially from the transmission circuit unit 22 of the train detection device 4. The detection signal L26 is output. Thereafter, all the tracks 1 (1T) to 6 (6T) are switched by the relays 19-1 to 19-n of the transmission switching unit 23, and the track 1 (1T) to the track 1 from the transmission circuit unit 22 of the train detection device 4 is switched. The relay detection signal R21 to relay detection signal R26 on the track 6 (6T) are output. The period up to here is the second timing. The relay detection signal R21 to relay detection signal R26 at the second transmission timing TM2 are signals for performing lower relay detection among the relays 19-1 to 19-n of the transmission switching unit 23.

  At the next third transmission timing TM3, the level detection signal L31 is output from the transmission circuit unit 22 of the train detection device 4 to the track 1 (1T). Then, switching to the track 2 (2T) is performed by the relays 19-1 to 19-n of the transmission switching unit 23, and the level detection signal L32 is output from the transmission circuit unit 22 of the train detection device 4 to the track 2 (2T). Similarly, the relays 19-1 to 19-n of the transmission switching unit 23 sequentially switch from the track 3 (3T) to the track 4 (4T), and the level detection signal L33 to the level sequentially from the transmission circuit unit 22 of the train detection device 4. The detection signal L34 is output. Next, switching to the track 5 (5T) is performed by the relays 19-1 to 19-n of the transmission switching unit 23, and the telegram detection signal D35 is output from the transmission circuit unit 22 of the train detection device 4 to the track 5 (5T). And it switches to the track 6 (6T) by the relays 19-1 to 19-n of the transmission switching unit 23, and outputs the telegram detection signal D36 from the transmission circuit unit 22 of the train detection device 4 to the track 6 (6T). Thereafter, all the tracks 1 (1T) to 6 (6T) are switched by the relays 19-1 to 19-n of the transmission switching unit 23, and the track 1 (1T) to the track 1 from the transmission circuit unit 22 of the train detection device 4 is switched. The relay detection signal R31 to relay detection signal R36 for the track 6 (6T) are output. The period up to here is the third timing. The relay detection signals R31 to R36 at the third transmission timing TM3 are signals for performing upper and lower relay detection among the relays 19-1 to 19-n of the transmission switching unit 23.

FIG. 4 is a diagram illustrating details of the electronic message detection signal, the level detection signal, and the relay detection signal.
In FIG. 4, the level detection signal and the relay detection signal 41 are sandwiched between the signal portion at t2 and the rear end portion of t3 in the entire signal period t4. The level detection signal and the relay detection signal 41 have such a signal configuration so that a decrease in the current and voltage level of the signal from the peak level to the bottom level can be easily detected. The presence detection can be performed by this level detection signal, and the operation of the relay can be confirmed by the relay detection signal.

  Further, in the electronic message detection signal 42, the signal portion at t6 is sandwiched between the front end portion of t5 and the rear end portion of t7 in the entire signal period t8. The electronic message detection signal 42 is modulated by a pulse width modulation method (PWM), an amplitude modulation method, a frequency modulation method, or the like in an n-bit signal portion. The telegram information of the signal unit includes, for example, information on whether the train route is normal, on which track the train is on, on which track it is output, in addition to detecting the presence of the train.

FIG. 5 is a block diagram illustrating an example in which the detection circuit of the train detection device is provided in duplicate.
The difference between the detection circuit 6 of the train detection apparatus shown in FIG. 5 and that shown in FIG. 2 is that the current detection circuits 21 and 25 and the voltage detection circuits 17 and 24 have a dual configuration, so that the current detection circuits 21 and 25 In addition, even if one of the voltage detection circuits 17 and 24 fails, the signal current and voltage can be detected in the other circuit, thereby improving the accuracy of the detection circuit. In this case, it is possible to detect a continuous signal corresponding to the transmission timing by reliably detecting a signal output continuously. Other configurations and operations are the same as those shown in FIG.

  It goes without saying that the configuration and operation can be changed as appropriate within the scope of the present invention, not limited to the above-described embodiment.

It is explanatory drawing which showed the whole structure of the train detection apparatus. It is explanatory drawing which showed the block diagram of a train detection apparatus. It is a switching timing chart of a train detection apparatus. It is a figure which shows the detail of a message | telegram detection signal, a level detection signal, and a relay detection signal. It is explanatory drawing which showed the duplication block diagram of the detection circuit of a train detection apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1T ... Track, 2, 3 ... Insulation balancer (ZB), 4 ... Train detector, 5 ... Transmission part, 6 ... Reception part, 11-1 to 11-n ... Insulation transformer (MT) for reception, 12-1 12-n: attenuator circuit (ATT), 13: A / D converter, 14: received signal processing unit, 15: central control unit, 16: detection circuit, 17 ... voltage detection circuit, 18 ... power transformer (PA-MT) ), 22... Transmission circuit section, 23... Transmission switching circuit, 19-1 to 19-n... Relay, 20-1 to 20-n ... transmission isolation transformer (MT), 21.

Claims (4)

In the train detection device having a reception unit that receives a reception signal from the track and a transmission unit that transmits a transmission signal on the track for each track,
Control means for detecting a train detection signal from the received signal from the track received by the reception unit, and supplying a transmission signal indicating the train detection signal to the transmission unit at a predetermined transmission timing;
A single detection means for detecting the presence or absence of a transmission signal indicating the train detection signal supplied from the control means to the transmission unit;
Switching means for switching the transmission signal indicating the train detection signal detected by the single detection means for each track by a switching signal output from the control means corresponding to the transmission timing. Train detection device. In the train detection device according to claim 1,
The single detection means includes a current detection unit and a voltage detection unit that perform current detection and voltage detection of a transmission signal indicating the train detection signal. In the train detection device according to claim 2,
The single detection unit detects an abnormal operation or a normal operation of a switching operation of the switching unit from a transmission signal indicating the train detection signal. In the train detection device according to claim 2,
A train detection apparatus comprising the current detection unit and the voltage detection unit of the single detection unit multiplexed.

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