JPH09175397A - Train safety device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a plurality of transmitter/receivers commonly for equipment at the periphery of a track circuit and establish a unified system. SOLUTION: A TD signal wave generation part 11 of a signal wave generation part 1 emits a TD signal wave for sensing a train, while a crossing signal wave generation part 12 emits a crossing signal wave having the same carrier frequency band as the TD signal wave but a different modulation system therefrom, and thereby a crossing signal wave free of restriction on the TD signal wave is transmitted to a track circuit. An ATC signal wave generation part 13 emits an ATC signal wave of different carrier from the TD signal wave so as to work well with development of the multi-aspect system of ATC information. The TD signal wave, ATC signal wave, and crossing signal wave are changed over by a transmitter 2 and transmitted, and the receiver for the TD signal wave and ATC signal wave and the transmitter for crossing signal wave are unified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train security device installed around a track circuit to secure train security, in particular, a train on-track detection function in a block section, a function of transmitting operation security and speed information to a train, and a detection of a railroad crossing advance. It relates to the unification of each facility of the function.

[0002]

2. Description of the Related Art A train detecting device for detecting that a train has entered a track circuit for detecting a presence of a block section around a track circuit, a train detecting device for level crossing control, and a signal for train control are transmitted to the track circuit. Devices having similar functions such as ATS and ATC devices for transmitting electric power are provided independently. Various studies have been made to share a plurality of devices having such similar functions.

[0003] A crossing signal wave for detecting that a crossing has advanced has adopted reverse power transmission transmitted from the rear of the train.
Since the ATC signal wave employs forward power transmission that is transmitted from the front in the traveling direction of the train, in an insulated track circuit having a function of blocking a signal at the boundary of a track circuit, a transmitter that transmits a level crossing signal wave It is impossible to share a transmitter for transmitting the ATC signal wave with the transmitter. The TD signal wave, which is a train detection signal wave for detecting a block section on-track, does not matter in the power transmission direction, but in many cases, forward power transmission is performed in consideration of transmission of block information to a rear traffic signal. When transmitting a TD signal wave in the forward direction, a transmitter for transmitting the TD signal wave and an AT
A transmitter that transmits a C signal wave can be shared, and in an ATC equipment section where equipment is concentrated, an example has been seen in which a transmitter that transmits a TD signal wave and a transmitter that transmits an ATC signal wave are shared. .

On the other hand, the non-insulated track circuit differs depending on the presence or absence of track resonance. Since the resonance type track circuit basically has one track circuit and one frequency, the frequency of the TD signal wave and the frequency of the ATC signal wave are shared, and the transmitter can be integrated. However, since the transmission direction of the signal wave is limited to the forward direction, it is not possible to detect the crossing advance.

In the non-resonant non-insulated track circuit, the transmitted signal wave flows evenly in the forward and reverse directions, so that the transmitter for the TD signal wave and the level crossing signal wave can be shared. If this transmitter is used for transmitting the ATC signal wave, there is no function to block the signal wave at the boundary of the track circuit.
Since the ATC signal wave cannot be discriminated from the TC signal wave, the transmitter of the ATC signal wave has an independent configuration, and step transmission for transmitting the ATC signal wave when the train enters the track circuit is adopted.

[0006]

As described above, in the non-resonant type non-insulated track circuit, the transmitter for the TD signal wave and the level crossing signal wave are shared, and the same signal wave is transmitted as the TD signal wave and the level crossing signal wave. Therefore, it is necessary to transmit a signal wave different from the TD signal wave in the adjacent section in order to discriminate the TD signal wave from the TD signal wave in the adjacent section, and the receiver of the level crossing signal wave also requires a transmitter corresponding thereto. Therefore, the number of receivers of the level crossing signal wave had to be increased by the number of TD signal waves.

[0007] Further, if a plurality of devices having similar functions are provided around the track circuit, the number of such devices becomes very large. On the other hand, in recent years, devices such as signal security devices have become microelectronics, and it is possible for the same transceiver to transmit different signal waves. Therefore, the transceiver of the TD signal wave, the transceiver of the level crossing signal wave and the ATC
It is desired to share a signal wave transmitter / receiver and unify the transmitter / receiver installed around the track circuit.

SUMMARY OF THE INVENTION The present invention has been made to satisfy such a demand, and it is possible to share a plurality of devices provided around a track circuit to unify them and to unify the type of a signal receiver for a level crossing signal wave. The purpose is to obtain a train security device that can be used.

[0009]

A train security apparatus according to the present invention has a signal wave generator (1), a transmitter (2), a receiver (3), and a switching signal generator (4). The signal wave generator (1) has a TD signal wave generator (11), a level crossing signal wave generator (12), and an ATC signal wave generator (13).
The signal wave generator (11) generates a TD signal wave for train detection, and the railroad crossing signal wave generator (12) generates a railroad crossing signal wave of a dedicated modulation method in which the carrier wave is in the same band as the train detection signal wave. The ATC signal wave generator (13) generates an ATC signal wave of a carrier having a different band from the TD signal wave, and the transmitter (2) has a transmission wave switching unit (21) and a transmission unit (22). The transmission wave switching unit (22) switches the signal wave generated by the signal wave generation unit (1) according to the switching signal from the switching signal generation unit (4) and sends it to the transmission unit (22). The signal wave transmitted from the transmission wave switching unit (21) is connected to the boundary point on the exit side of the track circuit and is transmitted to the non-resonant type non-insulated track circuit, and the receiver (3) is connected to the boundary point on the track circuit entry side. TD / railroad crossing signal wave demodulation unit (31) and ATC signal wave demodulation unit (32) A TD / railroad crossing signal wave demodulation unit (31) demodulates the TD signal wave and the railroad crossing signal wave, extracts and outputs a modulated wave, and an ATC signal wave demodulation unit (32) The signal detector (33) demodulates the wave and outputs a modulated wave, and the signal detector (33) outputs the TD signal wave and the level crossing signal wave output from the TD / railroad crossing signal wave demodulator (31) and the output from the ATC signal wave demodulator (32). The switching signal generator (4) receives the TD signal wave, the level crossing signal wave, and the ATC signal wave output from the signal detector (33), and outputs the ATC signal wave. A TD signal wave selection signal is generated when it is detected that a train has entered the track circuit of the present invention or when it is detected that a train has entered a forward track circuit of a track circuit having a level crossing ahead by a level crossing signal wave. , T
Generates an ATC signal wave selection signal when detecting that a train has entered the own track circuit with the D signal wave, and generates a railroad crossing signal wave selection signal only when the train has entered the forward track circuit having a railroad crossing. Then, the signal is sent to the transmission wave switching unit (21).

[0010]

In the present invention, a signal wave generator (1) is provided with a TD signal wave generator (11), a level crossing signal wave generator (12), and an ATC signal wave generator (13). T
The D signal wave generation section (11) generates a TD signal wave for train detection, and the level crossing signal wave generation section (12) generates a level crossing signal wave having the same carrier frequency band as the TD signal wave and a different modulation method. As a result, a railroad crossing signal wave that is not restricted by the TD signal wave is transmitted to the track circuit.

The ATC signal wave generator (13) has a TD
ATC signal wave of carrier wave different from signal wave is generated and ATC
The ATC information will be strengthened by coping with the multi-presentation of information.

The TD signal wave, the ATC signal wave, and the level crossing signal wave are switched by the transmission wave switching unit (21) of the transmitter (2), transmitted and received by the receiver (3), and transmitted and received by the receiver (3). And the ATC signal wave transmitter / receiver and the railroad crossing signal wave transmitter.

A switching signal generating section (4) for sending a signal wave switching signal to a transmission wave switching section (21) includes a TD from a receiver (3).
Input the detection conditions of signal wave, railroad crossing signal wave and ATC signal wave, and when there is no railroad crossing in the forward section, when it is detected that the train has entered the track circuit ahead by ATC signal wave or forward by railroad crossing signal wave A TD signal wave selection signal is generated when it detects that a train has entered a section further ahead of the railroad crossing section, and an ATC signal wave when it detects that a train has entered its own track circuit using the TD signal wave. Generates a selection signal of
When detecting that the train has advanced from the own track circuit by the C signal wave, a selection signal of a level crossing signal wave is generated.

[0014]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. As shown in the figure, the equipment of the train security device installed around the track circuit ST includes a signal wave generation unit 1s
, A transmitter 2s, a receiver 3s, and a switching signal generator 4s. The signal wave generation unit 1s includes a TD signal wave generation unit 11, a railroad crossing signal wave generation unit 12, and an ATC signal wave generation unit 13. The TD signal wave generation unit 11 generates a TD signal wave which is a signal wave for train detection, and the level crossing signal wave generation unit 12 generates a level crossing signal wave having a carrier frequency band in the same band as the TD signal wave and having a different modulation scheme. , An ATC signal wave generator 13 generates an ATC signal wave having a carrier different from the signal wave for train detection.

The transmitter 2s includes a transmission wave switching unit 21 and a transmission unit 2
And 2. The transmission wave switching unit 21 includes a switching signal generation unit 4s
The TD signal wave, the railroad crossing signal wave, and the ATC signal wave generated by the signal wave generation unit 1 are switched by the switching signal from the controller and transmitted to the transmission unit 22. The transmission unit 22 is connected to the boundary point 6s on the advance side of the track circuit ST via the matching transformer 5s, and transmits the signal wave sent from the transmission wave switching unit 21 to the own track circuit ST and the level crossing 7
To the forward track circuit BT having

The receiver 3s includes a TD / railroad crossing signal wave demodulator 31.
And an ATC signal wave demodulation unit 32 and a signal detection unit 33. The receiver 3s is connected to a boundary point 6a on the entry side of the track circuit ST via a matching transformer 5a, demodulates a TD signal wave, a level crossing signal wave, and an ATC signal wave, extracts a modulated wave, and outputs the modulated wave. The signal detecting section 33 selects the TD signal wave and the level crossing signal wave output from the TD / railway crossing signal wave demodulating section 31 and the ATC signal wave output from the ATC signal wave demodulating section 32 and sends them to the switching signal generating section 4s. The demodulated signal output is sent to the amplifier 8s connected to the train detection relay 9s. Further, the matching transformer 5b is provided at the railroad crossing BT at the crossing end point 6b1.
1, the level crossing receiver 3b1 is connected.

As shown in the block diagram of FIG. 2, the switching signal generator 4s includes an input interface 41, a controller 42, an arithmetic processor 43, a register group 44, and an output interface.
And the T input from the input interface 41.
The contents of the D signal wave, the level crossing signal wave and the ATC signal wave are analyzed by the arithmetic processing unit 43, and when it is detected that the train has entered the level crossing front track circuit boundary 6c with the level crossing signal wave, a TD signal wave is generated, Track circuit AT to track circuit ST with TD signal wave
ATS signal wave is generated when it is detected that a train has entered the train, and a selection signal of a railroad crossing signal wave is generated when it is detected that a train has entered the track circuit BT by the ATC signal wave, and the transmitter 2s It is sent to the transmission wave switching unit 21.

The operation of the embodiment configured as described above will be described with reference to the operation waveform diagram of FIG. Track circuit B ahead
When the train 10 is not on T, the switching signal generator 4
s sends a TD signal wave selection signal to the transmission wave switching unit 21 of the transmitter 2s. The transmission wave switching unit 21 transmits the TD
From the TD signal wave, the railroad crossing signal wave, and the ATC signal wave, which are sent from the signal wave
The D signal wave is selected and sent to the transmission unit 22. The transmission unit 22 transmits the transmitted TD signal wave to the boundary point 6s on the advancing side of the track circuit ST via the matching transformer 5s as shown in FIG. This TD signal wave passes through the track circuit ST and is sent from the boundary point 6a on the entry side of the track circuit ST to the receiver 3s via the matching transformer 5a. The TD / railroad crossing signal wave demodulation unit 31 of the receiver 3s demodulates the received TD signal wave and outputs a modulated wave to the signal detection unit 33. The signal detection unit 33 has T
When the modulated wave of the D signal wave is sent, the TD signal is sent to the train detection relay 9s via the amplifier 8s to clarify that the train 10 is not on the track circuit ST. The TD signal is also sent to the switching signal generator 4s. Switching signal generator 4s
Generates a TD signal wave selection signal when the TD signal is being transmitted.

In this state, when the train 10 located on the rear track circuit AT enters the boundary point 6a on the approach side of the track circuit ST, the TD signal wave is short-circuited by the axle of the train 10, and the reception input of the receiver 3s is reduced. Disappears. When the arithmetic processing unit 43 of the switching signal generating unit 4s cannot receive the TD signal and detects that the train 10 has entered the track circuit ST, the ATC
Instructs generation of a signal wave. When this ATC signal wave generation instruction is sent from the switching signal generation unit 4s to the transmission wave switching unit 21, the transmission wave switching unit 21 selects an ATC signal wave from the signal waves sent from the signal wave generation unit 1s. To the transmission unit 22. The transmission unit 22 converts the transmitted ATC signal wave into a signal shown in FIG.
As shown in (b), the signal is transmitted to the boundary point 6s on the advancing side of the track circuit ST through the matching transformer 5s, and the ATC is transmitted to the train 10.
Send information.

When the train 10 travels along the track circuit ST and enters the track circuit BT ahead from the boundary point 6 s on the exit side of the track circuit ST, the ATC signal wave sent to the track circuit ST changes according to the axle of the train 10. The short circuit is released and the track circuit S
The receiver 3s connected to the boundary 6a on the entry side of T
Receive a C signal wave. The ATC signal wave demodulation unit 32 of the receiver 3s demodulates the received ATC signal wave and extracts a modulated wave and sends it to the signal detection unit 33. When the demodulated wave of the ATC signal wave is sent, the signal detection unit 33 switches the ATC signal to the switching signal generation unit 4.
Send to s. The arithmetic processing unit 43 of the switching signal generation unit 4s
When the C signal is input and it is detected that the train 10 has advanced from the track circuit ST, generation of a level crossing signal wave is instructed. When the command to generate the level crossing signal wave is sent from the switching signal generation unit 4s to the transmission wave switching unit 21, the transmission wave switching unit 21 selects the level crossing signal wave from the signal waves sent from the signal wave generation unit 1s. To the transmission unit 22. As shown in FIG. 3C, the transmission unit 22 transmits the transmitted level crossing signal wave to the boundary point 6s on the advancing side of the track circuit ST via the matching transformer 5s. The level crossing signal wave transmitted from the boundary point 6s on the exit side of the track circuit ST is the level crossing control section B ₁ of the track circuit BT in which the train 10 is in front.
When the train is located at T, the matching transformer 5b is short-circuited at the axle of the train 10 to the railroad crossing end point 6b1 of the track circuit BT ahead.
1 is not sent to the railroad crossing receiver 3b1 connected via the communication line 1. And the train 10 stops at the railroad crossing end point 6b1.
, The level crossing receiver 3b1 receives the level crossing signal wave and ends the level crossing control. The level crossing signal wave received by the level crossing receiver 3b1 is independent of the TD signal wave since the carrier is in the same band as the TD signal wave and has a different modulation system, and the level crossing signal wave sent to all the level crossing control sections may be common. The level crossing receiver 3b1 provided in each level crossing control section can be made common.

When the train 10 completes the advance of the railroad crossing control section B ₂ T and the railroad crossing signal wave is sent to the receiver 3 c connected to the boundary 6 c on the entry side of the track circuit B ₂ T, the receiver 3
The level crossing signal wave modulation section in c detects a level crossing signal wave. The detection condition is output to the switching generator of the section, and the switching signal generator instructs the generation of the AD signal wave. This TD
The TD signal wave is transmitted from the transmitter 2c according to the signal wave generation instruction.

Although the above embodiment has been described with reference to the case where the railroad crossing 7 is present in the forward track circuit BT of the track circuit ST, if there is no railroad crossing 7 in the forward track circuit BT of the track circuit ST,
Immediately after detecting that the train 10 has advanced from the track circuit ST, the switching signal generation unit 4s generates a selection signal of the TD signal wave.

[0023]

As described above, according to the present invention, the TD signal wave generator, the railroad crossing signal wave generator, and the ATC
A signal wave generator is provided, and a TD signal wave generator generates a TD signal wave for train detection, and a level crossing signal wave generator generates a level crossing signal wave having a carrier wave in the same band as the TD signal wave and a different modulation wave. By doing so, a common level crossing signal wave that is not restricted by the TD signal wave can be transmitted to the track circuit, and a level crossing receiver that receives the level crossing signal wave can be unified.

Further, since the ATC signal wave generator generates an ATC signal wave of a carrier different from the TD signal wave, it is possible to cope with multi-presentation of the ATC information and to enhance the ATC information.

Since the TD signal wave, the ATC signal wave, and the level crossing signal wave are switched and transmitted by the transmission wave switching section of the transmitter, the TD signal wave transmitter, the ATC signal wave transmitter, and the level crossing signal wave transmitter Can be shared and unified.

A switching signal generator for transmitting a signal wave switching signal to the transmission wave switching unit receives the TD signal wave, the level crossing signal wave and the ATC signal wave from the receiver, and receives a level crossing with the ATC signal wave. When detecting that the train has entered the track circuit, or when detecting that the train has entered the section in front of the railroad crossing section with the level crossing signal wave, a selection signal of the TD signal wave is generated, and the own track circuit is generated by the TD signal wave. ATC signal wave selection signal is generated when it detects that a train has entered
Since the selection signal of the level crossing signal wave is generated when it is detected that the train has advanced from the track circuit by the signal wave, the signal wave transmitted from the transmitter can be reliably switched according to the progress of the train.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a switching signal generator of the above embodiment.

FIG. 3 is an operation waveform diagram showing an operation of the embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 signal wave generator 2 transmitter 3 receiver 4 switching signal generator 11 TD signal wave generator 12 railroad crossing signal wave generator 13 ATC signal wave generator 21 transmission wave switching unit 22 transmitter 31 TD / railroad crossing signal wave demodulator 32 ATC signal wave demodulation unit 33 signal detection unit 42 control unit 43 arithmetic processing unit

Claims (1)

[Claims] A signal wave generator (1), a transmitter (2), a receiver (3), and a switching signal generator (4), wherein the signal wave generator (1) is a TD signal wave generator. (11), a railroad crossing signal wave generator (12) and an ATC signal wave generator (13), and the TD signal wave generator (11) is a TD for train detection.
A signal wave is generated, a level crossing signal wave generating section (12) generates a level crossing signal wave of a dedicated modulation method in which a carrier wave is in the same band as a signal wave for train detection, and an ATC signal wave generating section (13) generates a TD signal. The transmitter (2) generates a transmission wave switching unit (21) and a transmission unit (22).
The transmission wave switching unit (22) switches the signal wave generated by the signal wave generation unit (1) according to the switching signal from the switching signal generation unit (4) and sends it to the transmission unit (22). (22) is connected to the boundary point on the exit side of the track circuit, transmits the signal wave sent from the transmission wave switching unit (21) to the non-resonant type non-insulated track circuit, and the receiver (3) enters the track circuit. Side boundary point, T
It has a D / railroad crossing signal wave demodulator (31), an ATC signal wave demodulator (32), and a signal detector (33), and the TD / railroad crossing signal wave demodulator (31) converts the TD signal wave and the railroad crossing signal wave. The demodulated wave is taken out and outputted, and the ATC signal wave demodulation unit (3
2) demodulates the ATC signal wave and outputs a modulated wave, and the signal detector (33) demodulates the TD signal, the level crossing signal wave, and the ATC signal wave output from the TD / level crossing signal wave demodulator (31). The ATC signal wave output from (32) is selected and output, and the switching signal generator (4) receives the TD signal wave, the railroad crossing signal wave, and the ATC signal wave output from the signal detector (33), When the ATC signal wave detects that the train has entered the front track circuit, or when it detects that the train has entered the forward track circuit of the track circuit having the front crossing with the level crossing signal wave, the TD signal wave A selection signal is generated, a selection signal of an ATC signal wave is generated when it is detected that a train has entered the own track circuit by a TD signal wave, and a level crossing signal is generated only when the train has entered a forward track circuit having a level crossing. Generate and send a wave selection signal A train security device for sending a signal to a signal switching unit (21).