JP4011204B2 - Railroad crossing control system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a point control type crossing control system.
[0002]
[Prior art]
Conventionally, there are two types of automatic control of railroad crossing breakers, railroad crossing alarms, etc .: continuous control system that continuously detects and controls the presence of trains using track circuits, etc. A point control system that detects and controls at a predetermined location is generally used.
[0003]
In the continuous control method using the track circuit described above, the track circuit is short-circuited when the train enters one track circuit among a plurality of track circuits that are continuously provided, thereby continuously changing the position of the train. The point control method using the level crossing controller described above is a method in which the track circuit is short-circuited when the train enters the non-insulated short track circuit, thereby detecting the train position for each point. It is.
[0004]
[Problems to be solved by the invention]
The conventional level crossing control methods described above all use the short circuit of the track circuit by the train, and therefore have the following problems (1) to (6).
[0005]
(1) A short circuit failure may occur due to floating rust, falling ash, fallen leaves, etc. on the rail tread, which may make detection impossible.
[0006]
(2) A short circuit failure may occur due to vehicle weight reduction, and detection may be impossible.
[0007]
(3) The track circuit is short-circuited by an automobile or the like passing through the railroad crossing and erroneously detected.
[0008]
(4) Since the train speed cannot be detected, control according to the train speed cannot be performed.
[0009]
(5) The system becomes large.
[0010]
(6) Maintenance such as adjustment of short-circuit sensitivity is required.
[0011]
The present invention has been made under such circumstances, and provides a railroad crossing control system that can reliably detect a train (including the case of one vehicle) and accurately control a railroad crossing breaker, a railroad crossing alarm, and the like. It is intended to provide.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, the railroad crossing control system is configured as follows (1) and (2) .
(1) A ground responder disposed on one side of the track, and disposed on the other side of the track facing the ground responder, constantly transmitting an interrogation signal, a response signal from the ground responder, and A crossing control system comprising: an interrogator that receives a response signal from an onboard responder on a nearby train; and a crossing control device that is connected to the interrogator and outputs a control signal to a crossing breaker and a crossing alarm There,
When the interrogator receives a response signal from the ground responder, the level crossing control device outputs a control signal for maintaining the crossing barrier of the level crossing breaker at the raised position, and the interrogator transmits the train When the response signal from the above onboard responder is received and the attributes such as train train number and type are determined based on the response signal, the lowering timing of the barrier and the start of the crossing alarm are adjusted based on the attributes. A railroad crossing control system that lowers the gate at that timing and outputs a control signal for driving the railroad crossing alarm.
(2) In the crossing control system according to (1),
A separate ground responder disposed on one side of the track at a location opposite to the ground crossing road along the track with respect to the placement location of the ground responder and the interrogator, and the separate ground Located on the other side of the track opposite the transponder, constantly transmits interrogation signals and receives response signals from the separate ground responders and on-board responders on nearby trains A separate interrogator connected to the crossing barrier,
In the crossing control device, the train blocks communication between the separate interrogator and the separate ground responder, and the separate interrogator cannot receive a response signal from the separate responder. A railroad crossing control system that outputs a signal for raising the shut-off lever when receiving a response signal from the on-board responder.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to an example of a railroad crossing control system.
[0020]
【Example】
FIG. 1 is a diagram illustrating the configuration and operation of a “crossing control system” that is an embodiment.
[0021]
In FIG. 1, 1 is a track (also referred to as a rail), 2 is a train traveling on the track 1 from left to right in the figure, and 3 is a responder (also referred to as a transponder) A disposed on the train 2. Reference numerals 4 and 5 are transponders B and C arranged on one side of the track 1 with a railroad crossing 9 interposed therebetween. 6 is an interrogator (also referred to as an interrogator) I arranged on the other side of the trajectory 1 so as to face the responder B • 4, 7 is a signal input from the interrogator I • 6 and performs necessary processing. Is a level crossing control device that outputs a required signal to a level crossing breaker and a level crossing alarm. Denoted at 8 is a barrier for blocking the railroad crossing 9 according to the output of the railroad crossing control device 7. An interrogator II is disposed on the other side of the track 1 so as to face the responder C · 5. Interrogators I and II always emit a microwave (or millimeter wave) spread spectrum interrogation signal toward responders B, 4, C, and 5, and responses from responders B, 4, and C, 5. It is configured to receive a signal.
[0022]
The operation of this embodiment will be described below with reference to FIG.
[0023]
(A) When the interrogation signal is constantly transmitted from the steady state interrogator I.6 and the response signal from the responder B.4 is received, the level crossing control device 7 has no train at the position of the responder B.4. It is determined that there is no train traveling to the railroad crossing 9 and that the operation is normal, and a signal for maintaining the barrier 8 in the raised position is output. When a question signal is always transmitted from the interrogator II • 10 and a response signal is received from the responder C • 5, the level crossing control device 7 determines that there is no train and normal operation at the position of the responder C • 5. .
[0024]
(B) Railroad crossing control when train 2 cuts off communication between interrogator I.6 and responder B.4 when interrogator I.6 cannot receive a response signal from responder B.4. The device 7 determines that the train 2 exists at the position of the responder B • 4. Next, the interrogator I.6 receives the response signal from the responder A.3 on the train 2, and the railroad crossing control device 7 determines the train number and type of the train 2 based on the response signal, and based on this. The lowering timing of the barrier can 8 and the timing of the start of the crossing alarm are adjusted, and the barrier can 8 is lowered at that timing to drive a railroad crossing alarm (not shown). Interrogators II and 10 are the same as (a) above. The descending timing may be adjusted by determining the train speed based on the duration of the response signal from the responder A · 3 or the number of responses.
[0025]
(C) When the train 2 passes the position of the responder B • 4 and the interrogator I • 6 can receive the response signal from the responder B • 4, the railroad crossing control device 7 It is determined that there is no train 2 at the location and the train has passed.
[0026]
Next, the train 2 cuts off the communication between the interrogator II · 10 and the responder C · 5, and the interrogator II · 10 cannot receive the response signal from the responder C · 5. When the response signal from A.3 is received, the railroad crossing control device 7 determines that the train 2 is at the position of the responder C.5 and passes through the train crossing, and outputs a signal for raising the barrier 8.
[0027]
As described above, in this embodiment, since the short circuit of the track circuit is not used, the vehicle is accurately detected without depending on the rail surface condition, the weight reduction of the vehicle, etc. Can be controlled accurately.
[0028]
In addition, since the attributes such as the train number and type and the speed of the vehicle can be detected, the timing of lowering the barrier and the timing of starting the crossing alarm can be adjusted appropriately. If necessary, the check-in and check-out of the vehicle can be confirmed according to the column number and type of the vehicle.
[0029]
Furthermore, since a microwave and a millimeter wave are used without requiring a track circuit, the system and each device constituting the system can be reduced in size. If the interrogator and the responder fail and cannot receive a response signal, it is determined that there is a train and is controlled to the safe side.
[0030]
Although it is not an embodiment of the present invention, the same train detection system as in the present embodiment can be used for branch control.
[0031]
【The invention's effect】
As described above, according to the present invention, it is possible to accurately detect a train and accurately control a railroad crossing breaker, a railroad crossing alarm, and the like.
[Brief description of the drawings]
FIG. 1 is a diagram showing the configuration and operation of an embodiment.
1 Trajectory 4, 5 Responder 6, 10 Interrogator 7 Railroad crossing control device

Claims (2)

A ground responder arranged on one side of the track and a ground responder on the other side of the track facing the ground responder , constantly transmitting interrogation signals, response signals from the ground responder and nearby trains A crossing control system comprising: an interrogator that receives a response signal from an on-board responder; and a crossing control device that is connected to the interrogator and outputs a control signal to a crossing breaker and a crossing alarm ,
When the interrogator receives a response signal from the ground responder, the level crossing control device outputs a control signal for maintaining the crossing barrier of the level crossing breaker at the raised position, and the interrogator transmits the train When the response signal from the above onboard responder is received and the attributes such as train train number and type are determined based on the response signal, the lowering timing of the barrier and the start of the crossing alarm are adjusted based on the attributes. A crossing control system that lowers the barrier at that timing and outputs a control signal for driving the crossing alarm. In the crossing control system according to claim 1,
A separate ground responder disposed on one side of the track at a location opposite to the ground crossing road along the track with respect to the placement location of the ground responder and the interrogator, and the separate ground Located on the other side of the track opposite the transponder, constantly transmits interrogation signals and receives response signals from the separate ground responders and on-board responders on nearby trains A separate interrogator connected to the crossing barrier,
In the crossing control device, the train interrupts communication between the separate interrogator and the separate ground responder, and the separate interrogator cannot receive a response signal from the separate responder, A railroad crossing control system that outputs a signal for raising the shut-off lever when receiving a response signal from an on-board responder on a train.

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