JP4108306B2 - Train detection system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a train detection system that detects entry and advancing into a detection block of a train based on a communication state by a communication means installed on the ground or on a vehicle. The present invention relates to a train detection system that can detect an advancing.
[0002]
[Prior art]
Conventionally, the position of a train traveling on a rail is mainly detected by a track circuit in which two rails on which the train travels are incorporated in a detection circuit. When a train wheel passes through the position of the rail cut, the track circuit is short-circuited by the wheel and the axle, thereby detecting that the train is on the rail. By detecting the presence of this train, the traffic signal with the track circuit inside was changed from blue to red to ensure the safety of train operation. However, this track circuit is composed of rails and train axles as part of the electrical circuit, so it is sensitive to the weather and requires detailed on-site adjustment work and regular maintenance work. There are problems such as the need for power supply equipment.
[0003]
In recent years, a new type of train detection system using wireless communication means has been developed as a system that does not depend on a track circuit. As shown in FIG. 7, this train detection system includes an interrogator Q (Q1 to Q3) installed in the vicinity of the rail 2 at each boundary of a block B (B1 to B3) that is a detection section of train travel. A ground responder G (G1 to G3) installed facing the interrogator Q so that the interrogator Q can communicate with the interrogator Q and the communication area is blocked by the vehicle body of the train 3 when the train passes. The on-board responder V installed on the train 3 and the on-ground responder G or on-board responder V received by the interrogator Q at the boundary of each block B. And a train detection device 1 that detects the entry / exit of the train 3 of each block B by taking in a signal from. The train 3 is a vehicle 3 ₁ And 3 ₂ Suppose that it is organized by. Reference numeral 4 denotes an external device that takes in and advances information of the train 3 of each block B obtained by the train detection device 1 and uses it for route control of the train.
[0004]
In the train detection system described above, in order to detect entry and advancement of the train 3, in FIG. ₁ And 3 ₂ Suppose that the train 3 composed of the train of No. 1 is in the block B1, proceeds in the direction of arrow C from the starting point side on the left side of the drawing toward the end point side on the right side, and enters the block B2. In this state, if the leading part of the train 3 traveling on the rail 2 advances between the interrogator Q2 and the ground responder G2, which are arranged opposite to the boundary between the blocks B1 and B2, communication between the two is interrupted. Is done. Then, the train detection apparatus 1 detects the absence of a response signal from the ground responder G2 sent from the interrogator Q2, and detects “train present”. Thereby, the said train detection apparatus 1 detects approach of the train 3 to front block B2.
[0005]
Next, the train 3 travels on the rail 2 and proceeds further, and the vehicle 3 constituting the train 3 ₂ When the onboard responder V mounted at the rear side position passes the position of the interrogator Q2, the interrogator Q2 receives the response signal from the onboard responder V2. Then, the train detection device 1 detects the reception of the response signal of the on-board responder V sent from the interrogator Q2, and detects the formation of the train 3 based on the identification information.
[0006]
Then, when the train 3 traveling on the rail 2 further proceeds and the last part of the train 3 passes between the interrogator Q2 and the ground responder G2 arranged opposite to the boundary between the blocks B1 and B2, Communication between them is restored. Then, the train detection apparatus 1 detects the reception of the response signal of the ground responder G2 sent from the interrogator Q2, and detects “no train”. Thereby, the said train detection apparatus 1 detects advance of the train 3 from back block B1.
[0007]
The timing diagram of the received signals of the ground responder G2 and the onboard responder V accompanying the traveling of the train 3 in this case is as shown in FIG. That is, in FIG. 8A, the leading vehicle 3 of the train 3 ₁ Is still in the block B1, the communication between the interrogator Q2 and the ground responder G2 is connected, and as shown in FIG. ₁ Before that, the received signal from the ground responder G2 is “present”. And time t ₁ At the top of the train 3 ₁ Enters the block B2 and proceeds between the interrogator Q2 and the ground responder G2, the communication between the two is interrupted, and in FIG. 8B, the received signal from the ground responder G2 is “None”. Become. As a result, time t ₁ It is detected that the train 3 has entered the block B2.
[0008]
Thereafter, the train 3 further advances and the rear vehicle 3 ₂ The on-board responder V mounted on the ₂ When the vehicle passes the position of the interrogator Q2, the interrogator Q2 receives the response signal from the on-board responder V, and as shown in FIG. ₂ Thus, the received signal from the onboard responder V is “Yes”.
[0009]
After that, the train 3 further advances and the time t _Three , The on-board responder V passes the position of the interrogator Q2 and the rear vehicle 3 ₂ When the rear end of the vehicle passes the position of the interrogator Q2, as shown in FIG. _Three Thus, the received signal from the onboard responder V is “none”, and as shown in FIG. 8B, the received signal from the ground responder G2 is “present”. Therefore, time t _Three When the received signal from the onboard responder V becomes “none”, the received signal from the ground responder G2 becomes “present” at the same time, so that it is detected that the train 3 has advanced from the block B1. Such a timing diagram of the received signal is obtained when the train 3 moves forward in the traveling direction (C direction) without stopping at the position of the interrogator Q2.
[0010]
[Problems to be solved by the invention]
However, actually, the traveling of the train 3 is not limited to the case where the train 3 moves forward without stopping at the position of the interrogator Q2 as shown in FIG. 8, and there are various traveling patterns. For example, as shown in FIG. 9A, the train 3 travels in the direction of arrow C, and the position of the interrogator Q2 is changed to the vehicle 3 ₂ After the on-board responder V passes, the vehicle 3 ₂ The signal received from the onboard responder V and the signal received from the ground responder G2 interfere with each other and stop at a position where the interrogator Q2 cannot receive either signal, and then advance in the direction of arrow E. Suppose that
[0011]
In this case, the timing diagrams of the received signals of the ground responder G2 and the onboard responder V are as shown in FIGS. ₂ The steps up to this are the same as those shown in FIGS. 8B and 8C. In this example, the position of the interrogator Q2 in FIG. ₂ While the on-board responder V is passing, the time t in FIG. ₂ To time t _Four Until then, the reception signal from the onboard responder V is “Yes”. Thereafter, as shown in FIG. ₂ After the rear end of the vehicle passes the position of the interrogator Q2, the train 3 has the same detection level of the received signal from the onboard responder V and the received signal from the ground responder G2, and both interfere with each other. Since Q2 stops once at a position where neither signal can be received, as shown in FIGS. 9B and 9C, time t _Four To time t _Five Until this time, both the received signal from the ground responder G2 and the received signal from the onboard responder V are “none”.
[0012]
Then, when the train 3 further proceeds and passes through a position where the received signal from the onboard responder V and the received signal from the ground responder G2 interfere with each other and the interrogator Q2 cannot receive either signal, As shown in FIG. 9B, the time t _Five , The received signal from the ground responder G2 is “Yes”. In this case, as shown in FIGS. 9B and 9C, the time t _Four To time t _Five In the meantime, there is a period A in which both the received signal from the ground responder G2 and the received signal from the onboard responder V are “none”.
[0013]
As another traveling pattern, as shown in FIG. 10A, the train 3 travels in the direction of arrow C, and the vehicle 3 is interrogated by the interrogator Q2. ₂ Is temporarily stopped at the position where the received signal from the on-board responder V is received, and then retreats in the direction of arrow D as shown in FIG. ₁ And rear vehicle 3 ₂ Suppose that it stops so that the gap part of connection with may match.
[0014]
The timing diagrams of the received signals of the ground responder G2 and the onboard responder V in this case are as shown in FIGS. 10 (c) and 10 (d). ₂ The steps up to this are the same as those shown in FIGS. 8B and 8C. In this example, since the train 3 is temporarily stopped at the position where the reception signal from the onboard responder V is received in FIG. 10 (a), the time t at which the train 3 is stopped in FIG. 10 (d). ₂ To time t _Four Until then, the reception signal from the onboard responder V is “Yes”. Thereafter, as shown in FIG. 10B, the train 3 moves backward in the direction of the arrow D, so that the received signal from the onboard responder V becomes “none”.
[0015]
Thereafter, the train 3 further moves backward, and as shown in FIG. 10 (b), the previous vehicle 3 is placed at the position of the interrogator Q2. ₁ And rear vehicle 3 ₂ And the communication between the interrogator Q2 and the ground responder G2 is connected in a state in which the gap portion of the connection with each other is stopped. _Five The received signal from the ground responder G2 becomes “Yes”. In this case, as shown in FIGS. 10C and 10D, the time t _Four To time t _Five In the meantime, there is a period A ′ in which both the received signal from the ground responder G2 and the received signal from the onboard responder V are “none”.
[0016]
Thus, even if the traveling patterns of the train 3 are different as shown in FIGS. 9 and 10, the received signal from the ground responder G2 and the received signal from the onboard responder V received by the interrogator Q2. In FIG. 10 (b), there are periods A and A ′ in which both signals are “none”, and the train 3 has not advanced from block B1 in FIG. 10 (b). Since the state in which the train 3 has advanced from the block B1 cannot be distinguished and detected, it is impossible to reliably detect the advance from the block.
[0017]
In order to cope with this, the on-board responder V shown in FIG. ₂ By arranging two units in the rear end of the vehicle in the traveling direction and recognizing the identification and order of the response signals received by the interrogator Q2, the traveling direction of the train 3 is specified as forward or backward. As shown in FIG. 10, it is conceivable to distinguish and detect cases where the traveling patterns of the train 3 are different. However, in such a system, the device configuration is complicated and large, and costs are increased.
[0018]
Therefore, an object of the present invention is to provide a train detection system that can cope with such problems and can reliably detect advancing from a detection block with a small device configuration.
[0019]
[Means for Solving the Problems]
In order to achieve the above object, the train detection system according to the present invention is installed in the vicinity of a rail at each boundary of a block which is a detection section of train travel. , Send and receive signals The first communication means and the second communication means that are communicable with the first communication means and are installed opposite to the first communication means so that the communication area is cut off by the train body when the train passes. And a third communication means that is communicable with the first communication means, and is installed at a position on the rear side of the train constituting the train, and a first communication means at the boundary between the blocks. From the received second or third communication means Receive A train detection device that captures a signal and detects entry / exit of a train in each block, and the second communication means And a period during which transmission signals from the third communication means interfere with each other and cannot be received by the first communication means. The second communication means or the third communication means at a predetermined time interval shorter than Transmitted signal from And the second communication means and the third communication means. Transmit signal from For receiving the received signal for a predetermined time interval of the on / off control and changing the received signal into a continuous received signal, from the second communication means and the third communication means Transmission signal Even if there is a train at a position where they cannot interfere with each other due to interference with each other, the signal from either the second communication means or the third communication means Transmission signal Indicates that reception is possible.
[0020]
With such a configuration, the second communication means And a period during which transmission signals from the third communication means interfere with each other and cannot be received by the first communication means. The second communication means or the third communication means at a predetermined time interval shorter than Transmitted signal from And the second communication means and the third communication means. Transmit signal from Is received from the second communication means and the third communication means by holding the received signal for a predetermined time interval of the on / off control and changing it to a continuous received signal. Transmission signal Even if there is a train at a position where they cannot interfere with each other due to interference with each other, the signal from either the second communication means or the third communication means Transmission signal Can be received.
[0021]
Moreover, the train detection system by other means is installed in the vicinity of the rail at each boundary of the block which is a detection section of train traveling, has a communication area having directivity, and transmits a question signal and receives a response signal. An interrogator is installed opposite the interrogator so that the communication area is cut off by the train body when passing through the train. The interrogator has a directional communication area and receives the interrogation signal and includes its own identification information. A ground responder that transmits a response signal, and only one on the rear side of the train that constitutes the train, has a directivity communication area, receives the interrogation signal, and receives the identification information of the train The onboard responder that transmits the included response signal and the response signal from the ground responder or onboard responder received by the interrogator at the boundary of each block, and the train progresses to the block ahead. A train detection device that performs detection and train advance detection from a rear block and sends train advance information of each block to an external device. In either one of the responders, the ground responder is connected to the means for transmitting the response signal. And the period when the response signals from the onboard responders interfere with each other and cannot be received by the interrogator. Control means for controlling on / off transmission of the response signal of the ground responder or on-vehicle responder at predetermined time intervals shorter than the above-mentioned ground responder and on-vehicle responder is provided inside the interrogator. from A time-holding means is provided for changing the received signal that has received the response signal into a continuous received signal by holding the received signal for a predetermined time interval of the on / off control, from the ground responder and the onboard responder. Response signal Even if there is a train at a position where they cannot interfere with the interrogator due to interference with each other, either the ground responder or the onboard responder Response signal Indicates that reception is possible.
[0022]
With such a configuration, the ground responder is controlled by the control means provided for the means for transmitting the response signal inside either the ground responder or the on-board responder. And the period when the response signals from the on-board responder interfere with each other and cannot be received by the interrogator ON / OFF control of transmission of the response signal of the ground responder or on-vehicle responder at a predetermined time interval shorter than the above, and the above-mentioned ground responder and on-vehicle responder are provided by a time limit holding means provided in the interrogator from By changing the received signal that received the response signal into a continuous received signal while maintaining the predetermined time interval of the on / off control, the response from the ground responder and the onboard responder Response signal Even if there is a train at a position where they cannot interfere with the interrogator due to interference with each other, either the ground responder or the onboard responder Response signal Can be received.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a block diagram showing an embodiment of a train detection system according to the present invention. The overall system configuration of this train detection system is the same as that shown in FIG. This train detection system detects the entry and advance of a train to a block which is a detection section of train travel, and as shown in FIG. 7, an interrogator Q (Q1 to Q3) and a ground responder G ( G1-G3), on-board responder V, and train detector 1 are provided.
[0025]
The interrogator Q transmits a question signal to a ground responder G or on-vehicle responder V, which will be described later, and receives first response signals from the ground responder G or on-vehicle responder V. Thus, the electromagnetic wave having a communication area having directivity is transmitted and received, and the rail 2 at each boundary of the block B (B1 to B3) which is a detection section of the train 3 traveling on the rail 2 It is installed near.
[0026]
For example, in FIG. 7, the left side of the rail 2 is the train travel start side, the right side is the train travel end side, and the first block B1 and the second block are spaced at predetermined intervals from the start side to the end point side. If B2, the third block B3,... Are set, the interrogator Q1 is at the left end of the block B1, the interrogator Q2 is at the boundary between the block B1 and the block B2, and the interrogator is at the boundary between the block B2 and the block B3. Q3 is installed.
[0027]
The ground responder G serves as a second communication means for receiving the interrogation signal transmitted from the interrogator Q and transmitting a response signal including identification information indicating that it is a ground responder. An electromagnetic wave having a communication area having directivity is transmitted and received, and the ground responder G1 faces each of the interrogators Q1 to Q3 so that the communication area is blocked by the vehicle body of the train 3 when the train passes. -G3 is installed. The interrogators Q1 to Q3 and the ground responders G1 to G3 are always in communication, and the train 3 traveling on the rail 2 passes between the two so that communication between the two is cut off. It is arranged at the position.
[0028]
The on-board responder V receives the interrogation signal transmitted from the interrogator Q, and transmits a response signal including identification information indicating the organization of the train 3 on which the vehicle is mounted. The vehicle 3 is adapted to transmit and receive electromagnetic waves having a communication area having directivity. ₁ And 3 ₂ so Constitution Train 3 train In the rear side position One is installed. And when the train 3 travels on the rail 2 and passes the positions of the interrogators Q1 to Q3, the on-board responder V communicates with the interrogators Q1 to Q3.
[0029]
Further, the train detection apparatus 1 takes in the response signals from the ground responders G1 to G3 or the onboard responder V received by the interrogators Q1 to Q3 at the boundaries of the blocks B1, B2, B3,. While detecting the entry of the train 3 to the block B ahead, the entry of the train 3 from the block B behind the traveling direction is detected, and the entry advance information of the train 3 of each block B is created. For example, one is provided in common to the plurality of interrogators Q1 to Q3, and is installed at any station in the line section, for example.
[0030]
Next, the internal structure of the interrogator Q, ground responder G, on-board responder V, and train detection device 1 will be described with reference to FIG. First, the interrogator Q includes a transmitter 5 that transmits an interrogation signal to the ground responder G or onboard responder V, and a receiver that receives a response signal from the ground responder G or onboard responder V. 6, a transmission unit 7 that transmits the response signal received by the reception unit 6 to the train detection device 1, and a control unit (for example, composed of a CPU) 8 that controls the operation thereof.
[0031]
Next, the ground responder G includes a receiving unit 9 that receives the interrogation signal from the interrogator Q and a transmission unit 10 that transmits a response signal to the interrogation signal. The on-board responder V includes a receiving unit 11 that receives the interrogation signal from the interrogator Q and a transmission unit 12 that transmits a response signal to the interrogation signal.
[0032]
Furthermore, the train detection apparatus 1 uses the receiving unit 13 that receives a response signal from the ground responder G or the on-board responder V sent from the transmitting unit 7 of the interrogator Q, and the response signal that has been taken in. A control unit (for example, composed of a CPU) 14 that detects entry and advance of the train 3 to the block B and creates and manages the entry and advance information, a memory 15 that records the created entry and advance information, and the entry And a transmission unit 16 for sending the advance information to the external device 4. The external device 4 takes in the information on the entry and advance of the train 3 and uses it for route control of the train, and is, for example, an interlocking device that controls the operation of a traffic light, a switch, and the like.
[0033]
Here, in the present invention, the ground responder G And a period during which the interrogator Q cannot receive the signals due to the transmission signals from the onboard responder V interfering with each other. The ground responder G or on-board responder V at a predetermined time interval shorter than Transmitted signal from On-off control of the transmission of the above-mentioned ground responder G and on-board responder V Transmit signal from Is provided for changing the received signal received from the ground responder G and the on-board responder V into a continuous received signal while maintaining the predetermined time interval of the on / off control. Transmission signal Even if there is a train 3 at a position where the interrogators Q cannot interfere with each other and cannot be received by the interrogator Q, either the ground responder G or the onboard responder V Transmission signal Can receive.
[0034]
That is, as shown in FIG. 1, an on / off control unit 17 is provided inside the ground responder G, and a time limit holding unit 18 is provided inside the interrogator Q. The on / off control unit 17 sends the transmission unit 10 Transmission signal Of the ground responder G And a period during which the interrogator Q cannot receive the signals due to the transmission signals from the onboard responder V interfering with each other. For example, both the received signal from the ground responder G2 and the received signal from the onboard responder V shown in FIGS. 9 and 10 are “none”. "From the transmitter 10 at a time interval shorter than the periods A and A '. Transmission signal Is controlled to turn on / off.
[0035]
The time keeping unit 18 includes the ground responder G and the on-board responder. V The reception signal received by the reception unit 6 is held for a predetermined time interval of the on / off control by the on / off control unit 17. Change to a continuous received signal This is a time keeping means, and the intermittent received signals from the ground responder G and the onboard responder V received by the interrogator Q are changed to continuous signals.
[0036]
In FIG. 1, the on / off control unit 17 is added to the transmission unit 10 in the ground responder G. On the contrary, the on / off control unit 17 is not provided in the ground responder G. An on / off controller 17 may be added to the transmitter 12 in the upper responder V. In addition, the on-board responder V is a train (vehicle 3 ₁ And 3 ₂ ) Rear side position (vehicle 3) ₂ ) Is installed.
[0037]
FIG. 2 is a timing diagram for explaining the operation of the on / off control unit 17 and the time limit holding unit 18. Now, as shown in FIG. 1, it is assumed that the on / off control unit 17 is added to the transmission unit 10 in the ground responder G and the response signal transmitted from the ground responder G is on / off controlled. At this time, the on / off controlled transmission signal is repeatedly turned on and off at a predetermined time interval x as shown in FIG. Therefore, the received signal from the ground responder G received by the interrogator Q repeats “Yes” and “No” at a predetermined time interval x as in the case of the transmission signal, as shown in FIG.
[0038]
Here, this on / off-controlled transmission signal includes both the reception signal from the ground responder G2 shown in FIGS. 9B and 9C described in the conventional example and the reception signal from the onboard responder V. When applied to the period A in which both are “none”, the result is as follows. That is, as shown in FIG. _Four To time t _Five Until this time, the received signals from the ground responder G2 and the onboard responder V interfere with each other and cannot be received by the interrogator Q2, and during that time, the received signal from the ground responder G2 is “none”. It becomes. In this case, as shown in FIG. 2A, since the transmission signal from the ground responder G2 is turned on and off at a predetermined time interval x, the time during which the transmission signal from the ground responder G2 is turned off. During x, the received signals from the ground responder G2 and the onboard responder V do not interfere. Therefore, as shown in FIG. 2 (c), the reception signal from the onboard responder V becomes “present” only during the off time x, and repeats “yes” and “none” at a predetermined time interval x. A reception signal from the on-board responder V is obtained.
[0039]
Then, as shown in FIGS. 2 (b) and 2 (c), the received signals from the ground responder G2 and the onboard responder V that repeat “Yes” and “No” at a predetermined time interval x are shown in FIG. By holding the predetermined time x by the time limit holding unit 18 in the illustrated interrogator Q, as shown in FIG. 2D and FIG. .
[0040]
Next, the operation of the train detection system configured as described above will be described. In FIG. 7, vehicle 3 ₁ And 3 ₂ Suppose that the train 3 composed of the train of No. 1 is in the block B1, proceeds in the direction of arrow C from the starting point side on the left side of the drawing toward the end point side on the right side, and enters the block B2. In this state, if the leading part of the train 3 traveling on the rail 2 advances between the interrogator Q2 and the ground responder G2, which are arranged opposite to the boundary between the blocks B1 and B2, communication between the two is interrupted. Is done. Then, the train detection apparatus 1 detects the absence of a response signal from the ground responder G2 sent from the interrogator Q2, and detects “train present”. Thereby, the said train detection apparatus 1 detects approach of the train 3 to front block B2.
[0041]
Next, the train 3 travels on the rail 2 and proceeds further, and the vehicle 3 constituting the train 3 ₂ When the onboard responder V mounted at the rear side position passes the position of the interrogator Q2, the interrogator Q2 receives the response signal from the onboard responder V2. Then, the train detection device 1 detects the reception of the response signal of the on-board responder V sent from the interrogator Q2, and detects the formation of the train 3 based on the identification information.
[0042]
Then, when the train 3 traveling on the rail 2 further proceeds and the last part of the train 3 passes between the interrogator Q2 and the ground responder G2 arranged opposite to the boundary between the blocks B1 and B2, Communication between them is restored. Then, the train detection apparatus 1 detects the reception of the response signal of the ground responder G2 sent from the interrogator Q2, and detects “no train”. Thereby, the said train detection apparatus 1 detects advance of the train 3 from back block B1.
[0043]
The timing diagram of the received signals of the ground responder G2 and the onboard responder V accompanying the traveling of the train 3 in this case is as shown in FIG. That is, in FIG. 3A, the leading vehicle 3 of the train 3 ₁ Is still in the block B1, the communication between the interrogator Q2 and the ground responder G2 is connected, and as shown in FIG. ₁ Before that, the received signal from the ground responder G2 is “present”. However, the received signal in this case repeats “Yes” and “No” at a predetermined time interval x, as shown in FIG. And time t ₁ At the top of the train 3 ₁ Enters block B2 and proceeds between the interrogator Q2 and the ground responder G2, the communication between the two is interrupted, and in FIG. 3B, the received signal from the ground responder G2 is “none”. Become. As a result, time t ₁ It is detected that the train 3 has entered the block B2.
[0044]
Thereafter, the train 3 further advances and the rear vehicle 3 ₂ The on-board responder V mounted on the ₂ When the vehicle passes the position of the interrogator Q2, the interrogator Q2 receives the response signal from the on-board responder V, and as shown in FIG. ₂ Thus, the received signal from the onboard responder V is “Yes”.
[0045]
After that, the train 3 further advances and the time t _Three , The on-board responder V passes the position of the interrogator Q2 and the rear vehicle 3 ₂ When the rear end of the vehicle passes the position of the interrogator Q2, as shown in FIG. _Three Thus, the received signal from the onboard responder V becomes “none”, and as shown in FIG. 3B, the received signal from the ground responder G2 repeats “yes” and “none” at a predetermined time interval x. Then, the reception signal from the ground responder G2 at this time is held for a predetermined time x by the time limit holding unit 18 in the interrogator Q shown in FIG. 1, and is continuously received as shown in FIG. 3 (d). It becomes. Therefore, as shown in FIGS. 3C and 3D, the time t _Three When the received signal from the onboard responder V becomes “None”, the received signal from the ground responder G2 becomes “Yes”, so that there is continuity between the two received signals. It is detected that 3 has advanced from block B1. Such traveling of the train 3 is a case where the train 3 moves forward in the traveling direction (C direction) without stopping at the position of the interrogator Q2.
[0046]
Next, as shown in FIG. 4A, the train 3 travels in the direction of arrow C, and the position of the interrogator Q2 is changed to the vehicle 3 ₂ After the on-board responder V passes, the vehicle 3 ₂ The signal received from the onboard responder V and the signal received from the ground responder G2 interfere with each other and stop at a position where the interrogator Q2 cannot receive either signal, and then advance in the direction of arrow E. The case will be described. The timing diagrams of the received signals of the ground responder G2 and the onboard responder V in this case are as shown in FIGS. 4 (b) and 4 (c). ₂ The processes up to this are the same as those shown in FIGS.
[0047]
In this example, the position of the interrogator Q2 in FIG. ₂ While the on-board responder V is passing, the time t in FIG. ₂ To time t _Four Until then, the reception signal from the onboard responder V is “Yes”. Thereafter, as shown in FIG. ₂ After the rear end of the vehicle passes the position of the interrogator Q2, the train 3 has the same detection level of the received signal from the onboard responder V and the received signal from the ground responder G2, and both interfere with each other. Since Q2 stops once at a position where neither signal can be received, as shown in FIG. _Four To time t _Five Until then, the received signal from the ground responder G2 is “none”. On the other hand, as described with reference to FIG. 2, the reception signal from the onboard responder V is received only during the off period x of the reception signal from the ground responder G2 that is controlled to be turned on and off. Therefore, as shown in FIG. 4C, the received signal from the onboard responder V is the time t. _Four To time t _Five In the period up to, “Yes” and “No” are received at a predetermined time interval x.
[0048]
Then, when the train 3 further advances and passes through a position where the received signal from the onboard responder V and the received signal from the ground responder G2 interfere with each other and the interrogator Q2 cannot receive either signal, As shown in FIG. 4B, time t _Five The received signal from the ground responder G2 is received as “Yes” and “No” repeated at a predetermined time interval x.
[0049]
The received signals from the ground responder G2 and the onboard responder V at this time are held for a predetermined time x by the time limit holding unit 18 in the interrogator Q shown in FIG. As shown in (e), it becomes a continuous received signal. Therefore, as shown in FIGS. 4D and 4E, the time t _Five As a result, the reception signal from the onboard responder V becomes “None” and the reception signal from the ground responder G2 becomes “Yes”, so that there is continuity between the two reception signals. Is detected to have advanced from block B1.
[0050]
Further, as shown in FIG. 5A, as the other train 3 travels, the train 3 travels in the direction of arrow C, and the vehicle 3 is interrogated by the interrogator Q2. ₂ Is temporarily stopped at the position where the received signal from the on-board responder V is received, and then retracted in the direction of arrow D as shown in FIG. ₁ And rear vehicle 3 ₂ A case will be described where the connection is stopped so that the gap portion of the connection matches. In this case, the timing diagrams of the received signals of the ground responder G2 and the onboard responder V are as shown in FIGS. 5 (c) and 5 (d). ₂ The processes up to this are the same as those shown in FIGS.
[0051]
In this example, since the train 3 is temporarily stopped at the position where the reception signal from the onboard responder V is received in FIG. 5 (a), the time t at which the train 3 is stopped in FIG. 5 (d). ₂ To time t _Four Until then, the reception signal from the onboard responder V is “Yes”. Thereafter, as shown in FIG. 5B, the train 3 moves backward in the direction of the arrow D, so that the received signal from the onboard responder V becomes “none”.
[0052]
Thereafter, the train 3 further moves backward, and the vehicle 3 in front is placed at the position of the interrogator Q2 as shown in FIG. ₁ And rear vehicle 3 ₂ And the communication between the interrogator Q2 and the ground responder G2 is connected in a state in which the gap portion of the connection with each other stops and the time t in FIG. _Five The received signal from the ground responder G2 repeats “Yes” and “No” at a predetermined time interval x. Then, the reception signal from the ground responder G2 at this time is held for a predetermined time x by the time limit holding unit 18 in the interrogator Q shown in FIG. 1, and is continuously received as shown in FIG. 5 (e). It becomes. In this case, as shown in FIGS. 5D and 5E, the time t _Four To time t _Five In the meantime, there is a period A ′ in which both the received signal from the ground responder G2 and the received signal from the onboard responder V are “none”, and there is no continuity between the two received signals. Become.
[0053]
Thus, as shown in FIG. 3, FIG. 4 and FIG. 5, when the running state of the train 3 is different, the received signal from the ground responder G2 received by the interrogator Q2 and the received signal from the onboard responder V are received. In FIG. 5 (b), the train 3 does not advance from the block B1 and the train 3 does not advance from the block B1 in FIG. 4 (a). It can be detected separately.
[0054]
In the above description, the case where the on / off controller 17 is added to the transmitter 10 in the ground responder G in FIG. 1 has been described, but the on-board response is not provided in the ground responder G. The on / off control unit 17 may be added to the transmission unit 12 in the device V. In this case, the operation is exactly the same as the relationship between the received signal from the ground responder G and the received signal from the onboard responder V is interchanged.
[0055]
FIG. 6 is a block diagram of the on-board responder V showing another embodiment. In this example, two onboard responders V1 and V2 are arranged in the train 3 in the direction of travel of the train 3 and are turned on / off to the transmitter 12 of one onboard responder V1 or V2. A control unit 17 is added. In this case, the traveling direction of the train 3 can be detected by the two on-board responders V1 and V2, and the advance of the train 3 can be detected in the same manner as described above. Since the on / off controller 17 is added to only one of the two onboard responders V1 and V2, the onboard responders V1 and V2 can be received continuously.
[0056]
【The invention's effect】
Since the present invention is configured as described above, according to the invention of claim 1, the second communication means And a period during which the signals received from the third communication means interfere with each other and cannot be received by the first communication means. The second communication means or the third communication means at a predetermined time interval shorter than Transmitted signal from And the second communication means and the third communication means. Transmitted signal from Is received from the second communication means and the third communication means by holding the received signal for a predetermined time interval of the on / off control and changing it to a continuous received signal. Transmission signal Even if there is a train at a position where they cannot interfere with each other due to interference with each other, the signal from either the second communication means or the third communication means Transmission signal May be receivable. Therefore, it is possible to reliably detect the train from the detection block with a small equipment configuration. In particular, even if the running state of the train is different, the first communication means receives from the second communication means Transmission signal And from the third communication means Transmission signal Are different from each other, and it is possible to reliably detect whether the train has advanced from a specific detection block in each traveling state.
[0057]
According to the invention of claim 2, the ground responder is provided by the control means provided for the means for transmitting the response signal inside either the ground responder or the on-board responder. And the period when the response signals from the on-board responder interfere with each other and cannot be received by the interrogator ON / OFF control of transmission of the response signal of the ground responder or on-vehicle responder at a predetermined time interval shorter than the above, and the above-mentioned ground responder and on-vehicle responder are provided by a time limit holding means provided in the interrogator from By changing the received signal that received the response signal into a continuous received signal while maintaining the predetermined time interval of the on / off control, the response from the ground responder and the onboard responder Response signal Even if there is a train at a position where they cannot interfere with the interrogator due to interference with each other, either the ground responder or the onboard responder Response signal May be receivable. Therefore, it is possible to reliably detect the train from the detection block with a small equipment configuration. In particular, even if the train running conditions are different, Response signal And from the on-board responder Response signal Are different from each other, and it is possible to reliably detect whether the train has advanced from a specific detection block in each traveling state.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a train detection system according to the present invention.
FIG. 2 is a timing diagram for explaining operations of an on / off control unit and a time limit holding unit shown in FIG. 1;
FIG. 3 is a timing diagram of received signals from a ground responder and an on-vehicle responder according to a certain traveling state of a train.
FIG. 4 is a timing diagram of received signals from a ground responder and an on-vehicle responder according to another traveling state of a train.
FIG. 5 is a timing diagram of received signals from a ground responder and an on-vehicle responder in accordance with still another traveling state of a train.
FIG. 6 is a block diagram of an on-board responder showing another embodiment.
FIG. 7 is a schematic diagram showing the overall system configuration of a conventional and a train detection system of the present invention.
FIG. 8 is a timing diagram of received signals from a ground responder and an on-board responder according to a certain running state of a train in a conventional train detection system.
FIG. 9 is a timing diagram of received signals from a ground responder and an on-board responder in accordance with another running state of a train in a conventional train detection system.
FIG. 10 is a timing diagram of received signals from a ground responder and an on-board responder in accordance with another running state of a train in a conventional train detection system.
[Explanation of symbols]
1 ... Train detector
2 ... Rail
3 ... Train
3 ₁ , 3 ₂ ... train vehicles
4 ... External device
6 ... Receiver in the interrogator
10: Transmitter in ground responder
12 ... Transmitter in the on-board responder
17 ... ON / OFF control unit
18. Time limit holding part
Q, Q1-Q3 ... Interrogator
G, G1-G3 ... Ground responder
V, V1, V2 ... On-board responder
B1-B3 ... Block

Claims (2)

A first communication means installed in the vicinity of the rail at each boundary of the block, which is a detection section of train travel, and transmitting and receiving signals ;
A second communication means installed opposite to the first communication means so as to be able to communicate with the first communication means, and the communication area is blocked by the train body when passing through the train;
Third communication means that is capable of mutual communication with the first communication means, and that is installed only one at a position on the rear side of the train constituting the train,
A train detection device that takes in a reception signal from the second or third communication means received by the first communication means at the boundary of each block and detects the entry / exit of the train in each block;
In a train detection system comprising
Transmitting from the second communication unit and a third above at short predetermined time interval than the period of the transmitted signal can not interfere with reception at the first communication means with one another from the communication unit the second communication means or the third communication means The transmission of the signal is controlled on / off, and the reception signal that has received the transmission signal from the second communication unit and the third communication unit is held for a predetermined time interval of the on / off control to be changed to a continuous reception signal. Providing means,
Even if there is a train at a position where the transmission signals from the second communication means and the third communication means interfere with each other and cannot be received by the first communication means, either the second communication means or the third communication means A train detection system characterized in that a transmission signal from one side can be received. An interrogator installed near the rail at each boundary of the block that is a detection section of train travel, having a communication area with directivity and transmitting an interrogation signal and receiving a response signal;
It is installed facing the interrogator so that the communication area is blocked by the train body when passing through the train, has a communication area with directivity, receives the interrogation signal, and sends a response signal containing its own identification information. A ground responder to transmit,
On-vehicle responder which is mounted on the rear side of the train constituting the train, has a directivity communication area, receives the question signal and transmits a response signal including identification information of the train When,
Take the response signal from the ground responder or on-board responder received by the interrogator at the boundary of each block above, detect the train entry to the front block and the train advance detection from the back block, A train detection device that sends out information on the block entry to the external device; and
In a train detection system comprising
In either the ground responder or the onboard responder, the response signals from the ground responder and the onboard responder interfere with each other in the interrogator at the interrogator. Providing a control means for controlling on / off transmission of a response signal of the ground responder or on-vehicle responder at a predetermined time interval shorter than a period during which reception is not possible ;
In the interrogator, there is a time-holding means for holding the received signal that has received the response signal from the ground responder and the on-board responder for a predetermined time interval of the on / off control and changing it to a continuous received signal. Provided,
Even if there is a train at a position where the response signals from the ground responder and the on-board responder interfere with each other and cannot be received by the interrogator, the response from either the ground responder or the on-board responder A train detection system characterized in that signals can be received.

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