JPH09309434A - Train detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the antinoise property when the trains in plural track circuits are detected by a train detector having a set of transmitter and receiver, and to detect the trains stably. SOLUTION: A connection converter 4 converts the transmitting output end and the receiving input end of a transmitter/receiver 2 to transmit and receive a train detecting signal to the track circuits B0T to B4T following the head position and the tail position of a train, and connects them to the border partition points of the track circuits. A checking converter 5 converts and connects the transmitting output end and the receiving input end of an intermittent checking part 3 which transmits and receives a checking signal to check the soundness of the track circuit and the like to the track circuits B0T to B4T, at every specific time to the border partition points of the track circuits where no train is existing other than the track circuit sending a train detecting signal, and the track circuits are checked intermittently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a train detection device in a non-insulated track circuit without rail insulation and in a non-resonant non-insulated track circuit that does not form a boundary structure by a resonance action instead of rail insulation.

[0002]

2. Description of the Related Art When a train detector having a set of transceivers is used to detect a train in a plurality of track circuits, a train detection signal is transmitted / received to / from each track circuit at a constant cycle regardless of whether the train is present or not. As a result, an intermittent signal is sent to one track circuit. For example, when train detection for 10 sets of track circuits is performed by one train detector,
The train detection signal actually transmitted to each track circuit is only 1/10 of the train detection signal transmitted and output from the train detector. In addition, the train detection signal wave is used as a modulated signal in order to separate it from various types of noise, but since the modulation component of the signal wave cannot be detected in the intermittent received signal, a method that does not rely on detection of the modulation frequency is used. The train detection signal is identified.
In addition, the train detection condition is that the received signal is repeated a predetermined number of times or more to distinguish it from noise.

[0003]

If the train detection signal is transmitted and received intermittently for each track circuit as described above, the modulation frequency of the train detection signal wave cannot be detected and noise due to noise or the like may not be detected. There is a disadvantage that the characteristic when selecting from the pseudo signal is poor. Further, in order to compensate for the poor selection characteristic with respect to the noise, the train detection condition is that the received signal is repeated a predetermined number of times or more. Therefore, it takes time to detect the train detection signal. Further, since the received signal is judged only by the instantaneous state, the followability to the state change is not sufficient.

The present invention has been made in order to solve the above disadvantages, and improves the noise resistance when a train detector having a set of transceivers is used to detect a train in a plurality of track circuits, and stably trains the train. An object of the present invention is to obtain a train detection device that can detect the train.

[0005]

A train detection device according to the present invention has a non-insulated track circuit and a train detector, and the non-insulated track circuit divides each block section into a plurality of track circuits, The circuit boundary has a non-insulated transmission / reception point, the train detector has a transmission / reception section, a connection switching section, an intermittent inspection section, and an inspection switching section, and the transmission / reception section detects the presence or absence of a train on each track circuit. The train detection signal is transmitted to the track circuit, the signal from the track circuit is received, and the connection switching unit switches the transmission output end and the reception input end of the transceiver by following the head position and tail position of the train running. Connect to the boundary division points of the track circuit,
The intermittent verification unit sends a verification signal to each track circuit to verify the condition of the track circuit, receives the verification signal from the track circuit, and the verification switching unit detects the transmission output end and the reception input end of the intermittent verification unit for train detection. It is characterized by connecting and switching to the boundary division points of each track circuit where the train does not exist other than the track circuit which is transmitting the signal at regular intervals.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, each block section is divided into a plurality of track circuits, and non-isolated transmission / reception points are provided at the boundary division points of each track circuit. A train detector having a transmitting / receiving unit, an intermittent checking unit, a connection switching unit, and a checking switching unit is provided for each block section. The transmission / reception unit of the train detector transmits a train detection signal to each track circuit in the blocked section and receives a signal from each track circuit. The intermittent verification unit sends a verification signal to verify the integrity of the track circuit and track,
Receive the transmitted verification signal. The connection switching unit switches the transmission output end and the reception input end of the transceiver so as to follow the head position and the tail position of the train and connects to the boundary division points of each track circuit. The verification switching unit connects the transmission output end and the reception input end of the intermittent verification unit to the boundary division points of each track circuit other than the track circuit that is sending the train detection signal at which trains are not present at regular intervals and connects them. The track circuit is checked intermittently.

As described above, the signals transmitted / received by the train detector are divided into a train detection signal for train detection and a verification signal for verifying the soundness of a track or the like according to the purpose and transmitted / received to / from each track circuit. The train detector stably detects the presence or absence of trains and also stably checks the presence or absence of abnormalities in the track circuit.

[0008]

1 is a block diagram showing the configuration of an embodiment of the present invention. As shown in the figure, the train detection device includes a plurality of track circuits A, B, C, and D for a plurality of track circuits, for example, five track circuits B0T-
B4T, C0T ~ C4T divided into each track circuit B0T ~
B4T, demarcation point of _{C0T~C4T B 0 ~B 4, C 0} ~
Having a transmission and receiving point of the non-insulated C _4, D _0. The train detector 1 has a transmitting / receiving unit 2, an intermittent checking unit 3, a connection switching unit 4 and a checking switching unit 5, is provided for each block section A, B, C, D, and the track circuit B0T of each block section is provided. B4T, C0T ~
The presence of a train at C4T is detected and sent to the condition communication circuit unit 6, and various conditions are input from the condition communication circuit unit 6.
For example, the transceiver unit 2 of the train detector 1b provided in the block section B transmits a train detection signal to each track circuit B0T to B4T and receives a signal from each track circuit B0T to B4T. The intermittent checking section 3 sends a check signal for checking the soundness of the track on which the track circuits B0T to B4T and the train 7 run to the track circuit B.
It transmits from 0T to B4T and receives the transmitted verification signal.
The connection switching unit 4 switches the transmission output end and the reception input end of the transceiver 2 to follow the head position and the tail position of the train and connect to the boundary division points B _{0 to} B ₄ , C ₀ of each track circuit B0T to B4T. To do. The verification switching unit 5 switches the connection between the transmission output end and the reception input end of the intermittent verification unit 3 and the boundary division points of the track circuits other than the two track circuits that are sending the train detection signal at regular intervals to perform the intermittent verification. The track circuit that transmits and receives the verification signal output from the unit 3 transmits the verification signal at regular intervals, for example, once every several seconds, and intermittently performs verification.

That is, each track circuit B0T to B4T, C
The purpose of the signal transmitted / received by the train detector 1 between 0T and C4T is to detect the presence or absence of the train 7, and to detect the soundness of the train as a train detection device or track circuit and the train running route when the train 7 is not present. There are two purposes of checking.
Therefore, the signal transmitted / received by the train detector 1 is divided into a train detection signal for train detection and a check signal for checking the soundness of a track or the like, and the signals are sent / received separately for each purpose.

In the train detection device constructed as described above, the operation when the length of each block section A, B, C, D is made slightly longer than the train length in order to operate the train at high density and at high speed is shown in FIG. The operation will be described with reference to the operation explanatory diagram.

As shown in FIG. 2A, when the train 7 enters the block section B, the head of the train 7 is in the track circuit B3T of the block section B, and the tail of the train 7 is in the block section A, train detector 1b connection switching part 4 of the block section B connects the transmission output end of the transceiver unit 2 for transmitting and receiving train detection signals to the demarcation point B ₄ of advancing side of the track circuit B3T, entry side of the track circuit B3T B ₃ of the track circuit B ₄ T and the boundary section point C ₀ of the track circuit B ₄ T on the advancing side are connected to the receiving input end of the transmitting / receiving section 2. Then, the train detection signal output from the transmission / reception unit 2 is transmitted to the track circuits B3T, B4T via the connection switching unit 4, and the train detection signal from the track circuits B3T, B4T is transmitted via the connection switching unit 4 to the transmission / reception unit 2 Send to. At this time, when the train 7 is not present in the block section C on the advancing side of the block section B, the connection switching unit 4 of the train detector 1c in the block section C outputs the train detection signal output from the transmitting / receiving unit 2 to the track. From the boundary division point C ₁ on the advancing side of the circuit C0T to the track circuit C
0T, C1T, and the boundary section point C ₀ on the entry side of the track circuit C0T and the boundary section point C ₂ on the exit side of the track circuit C1T are received and sent to the transmission / reception unit 2. In this way, the two-track circuit C0T, C at the approach end of the block section C where the train 7 is not present
A train detection signal is continuously sent to 1T, and the train 7 is in a standby state in which it may enter at any time. Further, the inspection switching unit 5 of the train detector 1c is a two-track circuit C0T, C1T that sends a train detection signal at the approach end of the block section C.
The connection with the track circuits C2T to C4T other than the above is switched at regular intervals, and the verification signal output from the intermittent verification section 3 is verified at the track circuits C2T to C4T at regular intervals, for example, once every few seconds. Send signals to check intermittently.

When the train 7 progresses and the head of the train 7 enters the track circuit B4T and the tail of the train 7 comes to the track circuit B0T as shown in FIG. 2 (b), the train detector The connection switching unit 4 of 1b connects the transmission output end of the transmitting / receiving unit 2 to the boundary dividing point B ₁ on the advancing side of the track circuit B0T, and the boundary dividing point B ₀ and the track circuit B1T on the entering side of the track circuit B0T.
The boundary division point B ₂ on the advancing side is connected to the reception input end of the transmission / reception unit 2. Then, the train detection signal output from the transmission / reception unit 2 is transmitted to the track circuits B0T and B1T. When the train 7 advances and the tail of the train 7 enters the track circuit B1T as shown in FIG. 2C, the connection switching unit 4 of the train detector 1b causes the transmission output end of the transceiver unit 2 to connect to the track circuit B1T. The boundary input point B ₂ on the advancing side is switched to the boundary input point B ₁ on the entry side of the track circuit B1T and the boundary input point B ₃ on the advancing side of the track circuit B2T. Further, the train 7 progresses, and as shown in FIG.
When the head of the train enters the track circuit C1T in the closed section C and the tail of the train 7 is located in the track circuit B2T in the closed section B, the connection switching unit 4 of the train detector 1c in the closed section C transmits the transmission / reception unit 2 The output end is connected to the boundary dividing point C ₂ on the advancing side of the track circuit C1T, and the boundary dividing point C ₁ on the entering side of the track circuit C1T and the boundary dividing point C ₃ on the advancing side of the track circuit C2T are received by the transceiver unit 2. It is connected to the input end and transmits the train detection signal output from the transmission / reception unit 2 to the track circuits C1T and C2T. Further, the connection switching unit 4 of the train detector 1b in the closed section B connects the transmission output end of the transmission / reception unit 2 to the boundary division point B ₃ on the advancing side of the track circuit B2T, and the boundary division point on the entrance side of the track circuit B2T. B ₂ and the boundary division point B ₄ on the advancing side of the track circuit B ₃ T are connected to the reception input end of the transmission / reception unit 2, and the transmission / reception unit 2
The train detection signal output from the track circuit B2T, B
Send to 3T. Then, the verification switching unit 5 of the train detector 1b sends the verification signal output from the intermittent verification unit 3 to the two-track circuits B0T and B1T in which the train at the approaching end of the closed section B is not located. In this way, the transmission points and the reception points of the train detection signals transmitted to the track circuits B0T to B4T and C0T to C4T of the closed sections B and C in which the train is located are shown in FIG.
As shown in (e) and (f), the trains 7 are sequentially switched as the train 7 advances. The track circuits B0T to B2 not transmitting the train detection signal due to the switching of the transmission / reception points of the train detection signal
The verification signal is transmitted to and received from T by switching the verification signal once every several seconds.

Then, as shown in FIG. 2 (g), the train 7
When the train advances from the closed section B, the connection switching unit 4 of the train detector 1b in the closed section B sends the train detection signal output from the transmission / reception unit 2 from the boundary division point B ₁ on the advance side of the track circuit B0T to the track circuit B0T. , B1T, track circuit B
The boundary division point B ₀ on the entry side of 0T and the boundary division point B ₂ on the entry side of the track circuit B1T are received and sent to the transmission / reception unit 2. In this way, the train detection signal is continuously sent to the two track circuits B0T and B1T at the approach end of the closed section B where the train 7 is not present, and the train 7 is in a standby state at any time. In addition, the verification switching unit 5 of the train detector 1b is a track circuit B2 in which the train 7 is not present except for the two track circuits B0T and B1T which are sending the train detection signal of the approach end of the block section B.
The connection with T to B4T is switched at regular intervals, and the verification signal output from the intermittent verification unit 3 is transmitted to the track circuit B2T to.
The track circuit B2 is transmitted by switching to B4T at regular intervals.
Check the state of T to B4T.

[0014]

As described above, the present invention divides the signals transmitted and received by the train detector into the train detection signal for train detection and the verification signal for verifying the soundness of the track, etc., for each purpose. Since the train detector sends and receives to the track circuit and detects the presence of a train with a single train detector and also checks the track circuit for abnormalities, it is necessary to perform stable train detection and track circuit condition check. You can

Further, since the train detection in a plurality of track circuits and the checking of the states of the track circuits and the like can be performed by one train detector, the amount of equipment can be reduced.

Furthermore, since the verification signal is transmitted to each track circuit intermittently but repeatedly, it becomes substantially the same as when it is continuously transmitted, and the noise resistance of the verification signal can be improved. It is possible to stably detect abnormalities such as rail breaks in the track circuit.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing the operation of the embodiment.

[Explanation of symbols]

 A, B, C, D Block section B0T-B4T Track circuit, C0T-C4T Track circuit 1 Train detector 2 Transmitter / receiver section 3 Intermittent verification section 4 Connection switching section 5 Verification switching section 6 Conditional communication circuit section 7 Train

Claims (1)

[Claims] 1. A non-insulated track circuit and a train detector are provided,
The non-insulated track circuit divides each block section into multiple track circuits and has a non-insulated transmission / reception point at the boundary division point of each track circuit.The train detector checks the transmission / reception section, connection switching section, intermittent check section It has a switching unit, the transmitting and receiving unit sends a train detection signal to detect the presence or absence of a train in each track circuit to the track circuit, receives the signal from the track circuit, and the connection switching unit receives the transmission output end of the transceiver Following the head position and the tail position of the train running on the input end, switching and connecting to the boundary division points of each track circuit,
The intermittent verification unit sends a verification signal to each track circuit to verify the condition of the track circuit, receives the verification signal from the track circuit, and the verification switching unit detects the transmission output end and the reception input end of the intermittent verification unit for train detection. A train detection device characterized in that it is connected to a boundary division point of each track circuit where a train does not exist other than a track circuit which is sending a signal, at fixed intervals.