JP2626875B2 - Train detector for three-track track - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train detecting device for a three-track track for detecting a train on a three-wire rail, and more particularly to a simplified structure of the train detecting device.

[0002]

2. Description of the Related Art As means for running a conventional line train and a Shinkansen train on a common line section, three rails of a basic rail, a standard gauge rail, and a narrow gauge rail are used. Conventional trains use a basic rail and narrow gauge rails, and Shinkansen trains use a three-rail rail that runs using basic rails and standard gauge rails.

[0003] In the case of using a three-wire type rail, a train is detected by assuming that there is no contact between the three rails.
This is performed by configuring a three-track train detection device that displays a stop signal as a train even if any of the rails is short-circuited.

[0004] The three-track railroad train detector must detect a short circuit caused by a train between the basic rail and the standard gauge rail or between the basic rail and the narrow gauge rail. In addition, a method using two conventionally used train detection devices is adopted.

However, in the conventional system using two train detectors, if the standard gauge rail and the narrow gauge rail are short-circuited at two places, for example, as shown in FIG. As shown in the block diagram, even if the train 25 exists between the standard rail 17 and the basic rail 17 of the track circuit, the narrow gauge rails extend from the two short-circuit points 26 and 27. The current for train detection of the standard gauge wraps around 18, and the train cannot be detected. In order to cope with this, for example, as shown in the configuration diagram of FIG. 7, the signal for train detection generated by the transmission unit 6 is divided by the time division device 28 into the signal for the standard gauge rail 19 and the narrow gauge rail.
Time-division into the signal for the
It is called "N receiving unit". ) And the standard gauge side receiving unit 11 (hereinafter, referred to as
It is called "S receiving section". ) Receives both the standard gauge rail 19 train detection signal and the narrow gauge rail 18 train detection signal, the standard gauge rail 19 and the narrow gauge rail. 18 is determined to be short-circuited.

[0006]

As described above, in order to accurately detect a train with the train detection device for a three-track track, it is necessary to notify a receiving side whether the signal is being transmitted to a standard gauge or a narrow gauge. A transmission line 28 is required. However, since the track circuit section usually has a length of about 1 km, a cable
It was not easy to lay the bull, it was expensive, and maintenance and inspection were not easy.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such disadvantages, and it is possible to reliably detect both the presence or absence of a train and a short circuit between a standard gauge rail and a narrow gauge rail with a simple configuration. It is an object of the present invention to obtain a train detection device for a three-track track that can perform the operation.

[0008]

A train detection apparatus for a three-track track according to the present invention includes a transmitter as a train detection signal transmitting device, and a narrow gauge signal receiver and a standard gauge signal as a train detection signal receiving device. It has a receiver and an anomaly detector, and the transmitter alternately outputs train detection signals on a narrow gauge rail and a standard gauge rail. The frequency divider, transmitter, transmitter counter, and signal switcher The frequency divider outputs a signal of a constant frequency obtained by reducing the frequency of the commercial power supply to a fraction of an integer, and the transmitter transmits a train detection signal based on the signal output by the frequency divider and transmits the signal. The side counter counts the number of waves of the commercial power supply, and outputs a switching signal at every predetermined constant wave number, and the signal switching unit determines the destination of the train detection signal transmitted by the transmitting unit every time the switching signal is received from the transmitting side counter. Switch between narrow gauge rails and standard gauge rails The signal receiver detects a signal on a narrow gauge rail and detects a train on the narrow gauge, and has a first receiving section and a first train detecting section, and the first receiving section has a narrow gauge. The first train detector detects the presence or absence of a train from the signal received by the first receiver, and the standard gauge signal receiver detects the signal on the standard gauge rail. Detecting a train on a standard gauge, having a second receiving section and a second train detecting section, wherein the second receiving section receives a signal on a standard gauge rail, and The second train detector detects the presence or absence of a train from the signal received by the second receiver, and the abnormality detector detects the presence or absence of the train on the narrow gauge and standard gauge tracks from the signals received by the narrow gauge signal receiver and the standard gauge signal receiver. It has a receiving counter, a logic circuit unit, and an abnormality detecting unit. The receiving counter counts the wave number of the commercial power supply on the transmitting side. Counts the same number as that counted, and outputs a timing signal.The logic circuit detects the presence or absence of a signal in the narrow gauge signal receiver and the standard gauge signal receiver based on the timing signal of the receiving counter, and receives the narrow gauge signal. The exclusive OR of the presence / absence of the signal from the detector and the standard gauge signal receiver is detected, and the abnormality detection unit detects the presence / absence of an abnormality on the orbit from the exclusive OR detected by the logic circuit unit.

[0009]

According to the present invention, the frequency divider outputs a signal of a constant frequency obtained by reducing the frequency of the commercial power supply to a fraction of an integer. The transmitting unit transmits a train detection signal based on the signal output from the frequency dividing unit. The transmission-side counter counts the number of waves of the commercial power supply and outputs a switching signal for each predetermined predetermined number of waves. The signal switching unit switches the destination of the train detection signal transmitted by the transmission unit between the narrow gauge rail and the standard gauge rail every time the switching unit receives the switching signal from the transmitting counter, and the transmitter is a narrow gauge rail. And a train detection signal is sent alternately to the rails of the standard gauge at intervals based on the commercial power supply.

The narrow gauge signal receiver detects a signal on a narrow gauge rail to detect a train on a narrow gauge, and has a first receiving section and a first train detecting section. The first receiver receives signals on the narrow gauge rail. The first train detector detects the presence or absence of a train from the signal received by the first receiver. The standard gauge signal receiver detects a signal on the standard gauge rail and detects a train on the standard gauge, and has a second receiving section and a second train detecting section. The second receiver receives the signal on the standard gauge rail. The second train detector detects the presence or absence of a train from the signal received by the second receiver, and separately detects a train on a narrow gauge track and a train on a standard gauge track.

The abnormality detector detects an abnormality in the orbit of the narrow gauge and the standard gauge from the signals received by the narrow gauge signal receiver and the standard gauge signal receiver, and includes a receiving counter, a logic circuit unit, and an abnormality detecting unit. Have. The receiving side counter counts the number of waves of the commercial power supply by the same number as that counted by the transmitting side counter, and outputs a timing signal. The logic circuit detects the presence or absence of a signal in the narrow gauge signal receiver and the standard gauge signal receiver based on the timing signal of the receiving counter, and performs an exclusive OR operation on the presence or absence of the signal in the narrow gauge signal receiver and the standard gauge signal receiver. Is detected. The abnormality detection unit detects the presence or absence of an abnormality on the track from the exclusive OR detected by the logic circuit unit, and detects abnormality of the train in synchronization with the signal of the transmitter.

[0012]

FIG. 1 is a block diagram of a train detection device for a three-track track showing one embodiment of the present invention. As shown in the figure, the three-track train detection device detects a train when, for example, a conventional line train and a Shinkansen train run in a common line section, and uses the basic rail 17 as a common rail. Narrow gauge rail 1
A track circuit is formed by the rails 8 and the rail 19 of the standard gauge and the two impedance bonds 21 and 22.

In the track circuit, both ends of the primary winding of one of the impedance bonds 20 at the boundary point 22 of the track circuit are connected to the common rail 17 and the narrow rail 18, respectively. Both ends of the primary winding of the other impedance bond 21 are connected to the common rail 17 and the standard rail 19, respectively. The neutral points of the primary windings of both impedance bonds 20 and 21 are connected to each other. Then, the current flowing from the common rail 17 of one impedance bond 20 to the neutral point is substantially equal to the current flowing from the narrow gauge rail 18 to the neutral point, and the current flowing to the neutral point of the other impedance bond 21 is substantially equal. Rail 1
The current flowing from 7 to the neutral point and the current flowing from the standard rail 19 to the neutral point are substantially equal to suppress the unbalance of the retrace current.

The train detection device for a three-track track has a transmitter 1 on the transmitting side of the train detection signal, and has a narrow gauge signal receiver 2, a standard gauge signal receiver 3, and an abnormality detector 4 on the receiving side of the train detection signal. .

The transmitter 1 alternately outputs a train detection signal to a narrow gauge rail 18 and a standard gauge rail 19,
It includes a frequency dividing section 5, a transmitting section 6, a transmitting side counter 7, and a signal switching section 8. The frequency divider 3 divides the frequency of the commercial power supply 16 and outputs a signal of a constant frequency. The transmitting unit 6 transmits a train detection signal based on the signal output from the frequency dividing unit 5. The transmission counter 7 counts the wave number of the commercial power supply 16. Each time the transmitting counter 7 counts a certain number of waves in which the total time of the counted waves is an integral multiple of the period of the train detection signal, the signal switching unit 8
A switching signal is output toward. The signal switching unit 8 switches the destination of the train detection signal transmitted by the transmission unit 6 between the narrow gauge rail 18 and the standard gauge rail 19 each time the switching signal is received from the transmitting side counter 7, and the narrow gauge rail. -A train detection signal is sent alternately to the rail 18 and the rail 19 of the standard gauge.

Here, in the three-track train detection device, the powering current of the train cannot be separated from the train detection signal. For example, if the commercial power supply 16 is "50 Hz", the frequency dividing unit 5 outputs the train detection signal. Is set to a frequency different from the frequency of the commercial power supply 16, for example, "25H"
z ”signal. The transmitting unit 6 transmits a train detection signal via the signal switching unit 8 based on the signal output from the frequency dividing unit 5. The transmission counter 7 counts the number of waves of the AC voltage of the commercial power supply 16 and outputs a switching signal to the signal switching unit 8. For example, if a switching signal is output for every 5 waves of the train detection signal, the length of the 5 waves of the train detection signal is the length of the 10 waves of the AC voltage. Each time the wave count is performed, a switching signal is output to the signal switching unit 8. The signal switching section 8 switches the destination of the train detection signal between the narrow gauge rail 18 and the standard gauge rail 19 every time a switching signal is received from the transmission side counter 7, as shown in the waveform diagram of FIG. Thus, the train detection signal is alternately output to the narrow gauge rail 18 and the standard gauge rail 19 every "5" waves.

The narrow gauge signal receiver 2 detects a train on a narrow gauge, and includes a first receiving section 9 (hereinafter referred to as an "N receiving section") and a first train detecting section 10 (hereinafter referred to as an "N gate"). This is referred to as a “train detection unit”). The standard gauge signal receiver 3 detects a train on a standard gauge, and includes a second receiving unit 11 (hereinafter, referred to as an "S receiving unit") and a second train detecting unit 12 (hereinafter, an "S gauge"). Train detection unit ”). The N receiving section 9 and the S receiving section 11 are each a standard gauge rail 19.
And the signal of the narrow gauge rail 18 is received. The N-gauge train detecting unit 10 and the S-gauge train detecting unit 12 respectively determine whether there is a train on a standard track and a train on a narrow track from signals received by the N receiving unit 9 and the S receiving unit 11, respectively. To detect.

In the narrow-gauge signal receiver 2 and the standard-gauge signal receiver 3 of the three-track track detecting device, the N-gauge train detecting unit 10 generates a periodic signal based on the signal received by the N receiving unit 9. When a signal is received, it is determined that there is no train. When a periodic signal cannot be received, it is determined that there is a train, and the presence or absence of a train is detected. The S-gauge train detector 12 similarly detects the presence or absence of a standard gauge train based on the signal received by the S receiver 11. For example, if there is no short circuit between the narrow gauge rail 18 and the standard gauge rail 19 and there is a train on the standard gauge, the train detection signal on the standard gauge rail 17 passes through the axle of the train. Is transmitted to the basic rail 15, only the S receiver 11 periodically receives the train detection signal as shown in the waveform diagram of FIG.
The N receiving unit 9 does not receive the train detection signal.

An abnormality detector 4 detects an abnormality in the orbits of the narrow gauge and the standard gauge from the signals received by the narrow gauge signal receiver 2 and the standard gauge signal receiver 3.
3. It has a logic circuit section 14 and an abnormality detection section 15. The receiving counter 13 counts the number of waves of the commercial power supply 16 by the same number as that counted by the transmitting counter 7, and outputs a timing signal. In this case, the transmission-side counter 5 outputs a timing signal each time it counts "10" waves, so that the reception-side counter also counts "10" waves of the commercial power supply 16 every time it counts "10" waves. To the timing signal. Here, since the commercial power supply 16 is a three-phase alternating current, even if the phases are different, the frequencies in the transmitter 1 and the abnormality detector 4 are the same, and the switching signal of the transmission side counter 7 and the reception side counter 1
Synchronization can be performed using the signal of No. 3.

The logic circuit section 14 synchronizes with the train detection signal on the narrow gauge rail 18 and the standard gauge rail 19 based on the timing signal of the receiving counter 13, and communicates with the N receiving section 9 and the S receiving section. The presence / absence of a signal with the unit 11 is detected. Here, if the presence or absence of a signal is represented by "1" or "0", for example, as shown in the explanatory diagram of FIG. 4, there is no train on the standard gauge and narrow gauge track, and the narrow gauge rail 18 and the standard gauge Rail of Rail 1
In the state where there is no short circuit between the N receiving unit 9 and the S receiving unit 1
1 and the train detection signal appears alternately. When there is a train on a narrow track and there is no short circuit between the narrow gauge rail 18 and the standard gauge rail 19, a train detection signal appears only in the S receiving unit 11. The logic circuit unit 14 detects the exclusive OR of the detected N reception unit 9 and S reception unit 11 based on the presence or absence of the signal. The abnormality detecting unit 15 is configured to operate the narrow gauge rail 18 and the standard gauge rail based on the continuation of the exclusive OR detected by the logic circuit unit 14.
The presence / absence of an abnormality such as a short circuit with the controller 19 is detected. As shown in FIG. 4, there is no short circuit between the narrow gauge rail 18 and the standard gauge rail 19, and when there is no train, the exclusive OR is always "1". When there is no short circuit in the rail 19 of the gauge and there is a train on one of the tracks, the exclusive OR periodically becomes "1".

Next, the narrow gauge rail 18 and the standard gauge rail 18 are used.
In the case where there is a short circuit with the rail 19 and there is no train on the standard gauge and the narrow gauge track, the signals on the narrow gauge rail 18 and the standard gauge rail 19 are respectively displayed on the other party's rail. Le 18,1
9, a N-reception unit 9 and an S-reception unit 11 generate a residual waveform of the train detection signal of the periodic waveform 23 and a residual waveform 24 generated by the short circuit, as shown in the waveform diagram of FIG. Receive the composite signal. Also, there is a short circuit between the narrow gauge rail 18 and the standard gauge rail 19, and
If the train is on a standard gauge or a narrow gauge track, the narrow gauge rail 18 and the standard gauge rail 19 respectively have the opposite rail.
Since the residual waveforms of the signals 18 and 19 are generated and the train detection signal flows through the train axle, the N receiving unit 9 and the S
The receiving unit 11 receives a signal having a small signal level.

Train and narrow gauge rail 18 and standard gauge rail
No train detection signal appears in the N receiving section 9 and the S receiving section 11 in a state where both short-circuits of the rail 19 are present. Since the train detection signal appears in both the receiving unit 9 and the S receiving unit 11, the respective states can be detected. When the abnormality detection unit 15 obtains the exclusive OR of this state, there is no short circuit when the logical OR is always or periodically “1”, and there is a short circuit when the exclusive OR is always “0”. Therefore, the N receiving unit 9
And the presence or absence of a signal from the S receiving unit 11 to detect the presence or absence of a train or the presence or absence of an abnormality in the device.

Further, when the power failure or the train detection device for the three-track track fails, neither the N receiving unit 9 nor the S receiving unit 11 detects any signal. Can be.

As described above, by synchronizing the entire three-track train detection device with the frequency of the commercial power supply, there is no need to transmit the transmission timing to the abnormality detector 2, and the train can be accurately detected. Can be.

The narrow gauge rail 18 and the standard gauge rail
Narrow gauge rail 1 depending on the combination of the presence or absence of the signal on rail 19
Since an abnormality such as a short circuit between the rail 8 and the rail 19 of the standard gauge is detected, the abnormality can be reliably detected with a simple configuration, and the presence or absence of a train can be detected according to the state of the abnormality, thereby reliably detecting the train. be able to.

[0026]

As described above, according to the present invention, a transmitter transmits a train detection signal having a frequency obtained by reducing the frequency of a commercial power supply to a fraction of an integer at a constant interval based on the frequency of the commercial power supply. And the standard gauge rails are alternately sent, so that the trains on the narrow gauge and standard gauge tracks can be searched alternately at regular intervals based on the frequency of the commercial power supply.

The narrow gauge signal receiver receives the signal on the narrow gauge rail, detects the presence or absence of a train from the received signal, the standard gauge signal receiver receives the signal on the standard gauge rail, The presence or absence of the train is detected from the received signal, and the presence or absence of the train on the narrow track and the standard track can be independently detected.

The abnormality detector counts the wave number of the commercial power supply by the same number as that counted by the transmission side counter, detects the presence or absence of a signal in the narrow gauge signal receiver and the standard gauge signal receiver based on the number, and detects the narrow gauge signal. The exclusive OR of the signal of the receiver and the standard gauge signal receiver is detected, and the presence or absence of an abnormality on the track is detected from the detected exclusive OR, so that it is synchronized with the switching cycle of the train detection signal of the transmitter. The presence or absence of an abnormality on the orbit can be accurately detected.

Further, since the entire three-track track detection device is synchronized from the frequency of the commercial power supply, it is not necessary to transmit the transmission timing signal to the detection signal receiver.
A transmission line for informing whether the signal is transmitted to the standard gauge rail or the narrow gauge rail becomes unnecessary.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a reception waveform diagram in a normal state.

FIG. 3 is a reception waveform diagram when a train enters a standard gauge.

FIG. 4 is an explanatory diagram for explaining the presence or absence of a reception waveform.

FIG. 5 is a reception waveform diagram when a standard gauge and a narrow gauge rail are short-circuited.

FIG. 6 is an explanatory diagram of a conventional three-wire track circuit.

FIG. 7 is a configuration diagram of a conventional three-wire track circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmitter 2 Standard gauge signal receiver 3 Narrow gauge signal receiver 4 Abnormality detector 5 Frequency divider 6 Transmitter 7 Transmitter counter 8 Signal switcher 9 N receiver 10 N gauge train detector 11 S receiver 12 S-gauge train detector 13 Reception counter 14 Logic circuit 15 Abnormality detector 16 Commercial power supply 17 Basic rail 18 Narrow gauge rail 19 Standard gauge rail

Claims (1)

(57) [Claims] 1. A three-track track for detecting a train by providing two impedance bonds in a section comprising a narrow gauge and a standard gauge using one rail as a common rail using three rails. In the train detection device, a transmitter is provided as a transmitting device of the train detection signal, and a narrow gauge signal receiver, a standard gauge signal receiver, and an abnormality detector are provided as a receiving device of the train detection signal, and the transmitter is a narrow gauge laser. It outputs a train detection signal alternately to the rail of the standard gauge and the standard gauge. It has a frequency divider, a transmitter, a transmitter counter, and a signal switcher. The transmitter outputs a signal with a constant frequency that is reduced by a factor of 1.The transmitter transmits a train detection signal based on the signal output from the frequency divider, and the transmitting counter counts the number of waves of the commercial power supply and determines a predetermined constant. A switching signal is output for each wave number, and the signal switching unit switches off from the transmitting counter. The transmission destination of the train detection signal transmitted by the transmitter every time a replacement signal is received
The narrow gauge signal receiver detects the signal on the narrow gauge rail and detects the train on the narrow gauge, and the first receiving unit and the first train The first receiving unit receives a signal on a narrow gauge rail, the first train detecting unit detects the presence or absence of a train from the signal received by the first receiving unit, and The signal receiver detects a signal on a standard gauge rail and detects a train on the standard gauge. The signal receiver has a second receiving unit and a second train detecting unit. The signal on the standard gauge rail is received. The second train detector detects the presence or absence of a train from the signal received by the second receiver, and the abnormality detector receives the narrow gauge signal receiver and the standard gauge signal. It detects abnormalities in the orbits of the narrow gauge and the standard gauge from the signal received by the detector, and has a receiving counter, a logic circuit unit, and an abnormality detecting unit. The counter counts the number of waves of the commercial power supply by the same number as that counted by the transmitting counter, and outputs a timing signal.The logic circuit unit uses the timing signal of the receiving counter to generate a signal between the narrow gauge signal receiver and the standard gauge signal receiver. The presence / absence of a signal is detected, and the exclusive OR of the presence / absence of a signal from the narrow gauge signal receiver and the standard gauge signal receiver is detected. A train detection device for a three-track track characterized by detecting.