JP5078439B2 - Information transmission equipment - Google Patents

Description

  The present invention relates to an information transmission device that exchanges information between the ground and a train.

  In order to detect the position of a train and control the train, a track circuit having a rail as a part of an electric circuit is widely used. The track circuit divides the rail into desired lengths, and as shown in FIG. 6, a signal current Is is transmitted to the rails 6L and 6R by a transmitter 22 provided on the train advance side of each track circuit 1T to 3T. When the train 3 is not present in each track circuit 1T to 3T, the signal current Is transmitted to the rails 6L and 6R is received by the receiver 23 provided on the train approach side of each track circuit 1T to 3T. . For example, when the train 3 enters the track circuit 2T, the left and right rails 6L and 6R are short-circuited by the axle 16, and the signal current Is transmitted from the transmitter 22b is not detected by the receiver 23. Detect that it has entered. Further, an ATC signal having information such as speed limit is transmitted from the transmitter 22 to the rails 6L and 6R, and the ATC signal flowing through the rails 6L and 6R is received by the on-vehicle receiver via the power receiver provided in the train 3. Thus, the speed of the train 3 is controlled below the speed limit.

  In addition, in order to clearly detect that the train has entered a non-insulated track circuit that does not provide rail insulation at the boundary in the track circuit, as shown in Patent Document 1, the primary side of the three-winding transformer is reversed. The voltage drop due to the fixed length of the left and right rails is detected by the two coils, respectively, and the change of the signal current flowing in the rail is detected to clarify the boundary of the track circuit.

  The method of detecting that the train has entered the track circuit due to the short circuit of the left and right rails is that the signal current transmitted from the transmitter to the rail does not flow behind the axle, but follows the track circuit where the train is located. When a train enters, since it is not possible to detect that a subsequent train has entered and information cannot be transmitted to the subsequent train, only one train is entered as one track circuit. For this reason, there was a disadvantage that the train could not be operated at high density.

  Patent Document 2 and Patent Document 3 disclose information transmission devices that exchange information between the ground and a train without being affected by the rail axle short circuit. In the information transmission device disclosed in Patent Document 2, two rails that are separated from each other in the longitudinal direction are short-circuited by a short-circuit wire, and the mid-point of the short-circuit wire is connected to each other via a transformer coil. A short circuit and coil form a closed circuit, the other coil of the transformer is connected to the ground device, and information is transferred between the ground and the vehicle when the on-vehicle power receiver is electromagnetically coupled to the rail between the short-circuit points. The transmission is done.

The information transmission device disclosed in Patent Document 3 is configured by using one rail of one line of two adjacent lines and one rail of the other line to form a track circuit, and two adjacent lines I am trying to exchange information with trains that run on the road.
Japanese Utility Model Publication No. 5-76940 Japanese Patent Publication No. 3-19820 Japanese Patent No. 3197915

  Since the information transmission device disclosed in Patent Document 1 transmits information between the ground and the train only in a certain section short-circuited by the two rail short-circuit lines, information is continuously transferred between the ground and the train. I couldn't.

  Further, in the track circuit that forms a closed circuit by short-circuiting the axle, as shown in FIG. 6, the signal current Is flows in opposite directions on the left and right rails, and the noise current In such as a return current is the same direction on the left and right rails. However, if a closed circuit is formed by two rails, a short-circuit wire and a coil, the signal current flowing between the rail short-circuit points is two rails. In the same direction, it is greatly affected by the noise current, and the transmission error rate becomes high.

  In addition, the information transmission device disclosed in Patent Document 2 can be applied only when two lines are adjacent to each other, and the influence of noise current cannot be reduced.

  The present invention solves such a problem, detects the presence of a plurality of trains on one track circuit, continuously transfers information between the ground and each train, and reduces the influence of noise current. The object is to provide a transmission apparatus.

The information transmission device of the present invention includes an information transmission path provided in a track circuit having a rail as a part of an electric circuit , a ground device, and an on-board device mounted on a train. The rail is divided into a plurality of sections, and is composed of a closed circuit in which one of the pair of rails in each section, a DC blocking capacitor, and a secondary coil of a transformer are connected in series. The transmitter has a transmitter and a receiver connected to the primary coil of the transformer. The transmitter transmits a signal including train control information to the information transmission path, and the receiver is transmitted from the onboard device to the information transmission path. A signal including train state information is received, the on-board device has a transmitter and a receiver, the transmitter transmits a signal including train state information from the transmission / reception coil to the information transmission path, and the receiver transmits information. Send a signal containing train control information being sent to the road Characterized by receiving from the signal coil.

  The processing device of the ground device mutually transmits the train state information and the processing device of the adjacent ground device, and the train transmitted from the processing device of the ground device adjacent to the train state information received by the receiver and the train traveling direction. Train control information including boundary position information obtained by dividing the preceding train position information and rails from the state information is generated and output to the transmitter, and the processing unit of the onboard device trains based on the train control information received by the receiver. Is calculated and output to the speed control unit, and train state information including the own train position, train number, and traveling direction is generated and output to the transmitter.

Further, the information transmission path is preferably constituted by two closed circuits in which a DC blocking capacitor and a secondary coil of a transformer are connected in series to a pair of rails in each section obtained by dividing the rail into a plurality of sections. .

  Furthermore, the train control information may be transmitted to one of the two closed circuits of the information transmission path, and the train state information may be transmitted to the other.

  Preferably, the transmitter of the ground device transmits the train control information by performing spread spectrum modulation, and the transmitter of the onboard device transmits the train state information by performing spread spectrum modulation.

  According to the present invention, an information transmission path is constituted by a closed circuit in which a rail is divided into a plurality of sections, and a rail on one side of each section, a DC blocking capacitor, and a secondary coil of a transformer are connected in series. The level of the signal current transmitted from the vehicle can be kept almost constant without being affected by the short-circuit of the axle of the train, and fluctuations in the reception level of the on-board device can be reduced to stabilize the train control information transmitted from the ground device. Can be received.

  In addition, since the signal current transmitted to the rails of the information transmission path flows to the rear of the train even if the left and right rails are shorted to the axle, multiple trains can be located on a single track circuit. It can be operated and information can be exchanged with a plurality of trains on one track circuit.

  Further, the information transmission path is constituted by two closed circuits in which a DC blocking capacitor and a secondary coil of a transformer are connected in series to the left and right rails of each section obtained by dividing the rail into a plurality of sections, thereby Information can be transmitted between trains on two channels, and reliability can be improved.

  Furthermore, the transmitter of the ground device and the transmitter of the on-vehicle device can reduce the influence of noise by transmitting the information by performing spread spectrum modulation.

FIG. 1 is a block diagram showing the configuration of the information transmission apparatus of the present invention. As shown in the figure, the information transmission device includes information transmission paths 1a to 1d and ground devices 2a and 2b provided for each of the track circuits 1T to 4T, an onboard device 4 mounted on trains 3a and 3b, and a transmission / reception coil. And 5. Information transmission line 1, left and right rails 6L, whereas if Re 6R noise, for example, a rail 6L divided every track circuit 1T～4T, DC blocking capacitor and the secondary coil of the transformer 7a~7c connected in series 8 is connected to both boundaries of the divided rail 6L, and the closed circuit is constituted by the rail 6L of the track circuits 1T to 4T, the secondary coil of the transformer 7, and the DC blocking capacitor 8. The ground device 2a includes a transmitter 9a and a receiver 10a for the track circuit 1T connected to the primary coil of the transformer 7a, and a transmitter 9b and a receiver 10b for the track circuit 2T connected to the primary coil of the transformer 7b. The ground device 2b is used for the track circuit 4T connected to the primary coil of the transformer 7d and the transmitter 9c and the receiver 10c for the track circuit 3T connected to the primary coil of the transformer 7c. Transmitter 9d, receiver 10d, and processing device 11b. The transmitter 9 transmits a signal including train control information to the information transmission path 1, and the receiver 10 receives a signal including train state information transmitted from the on-board device 4 to the information transmission path 1. The processing device 11 is connected to the processing device 11 of the adjacent ground device 2 by the condition communication circuit 12, transmits train state information to each other, outputs train control information to the transmitter 9, and receives the train state received by the receiver 10. Enter information.

  The on-board devices 4a and 4b each have a transmitter 13, a receiver 14, and a processing unit 15. The transmitter 13 transmits a signal including train state information from the transmission / reception coil 5 to the information transmission path 1, and the receiver 14 receives a signal including the train control information transmitted to the information transmission path 1 from the transmission / reception coil 5. The processing unit 15 calculates the speed limit of the train 3 based on the train control information received by the receiver 14 and outputs it to the speed control unit (not shown) and also outputs the train state information of the own train to the transmitter 13.

  A process when the train control information is transmitted to the information transmission paths 1a and 1b by the ground device 2a of the information transmission device and received by the on-board devices 4a and 4b to control the speed of the trains 3a and 3b will be described.

  The processor 11a outputs the train control information including the preceding train position information, the position information on the rail boundary C1 on the train approaching side of the information transmission path 1a, and the identification number of the track circuit 1T to the transmitter 9a, and also precedes the transmitter 9b. Train control information including the train position information, the position information of the rail boundary C2 on the train approach side of the information transmission path 1b, and the identification number of the track circuit 2T is output. The transmitter 9a sends the signal current modulated by the input train control information to the primary coil of the transformer 7a, transmits the signal current I1 from the secondary coil of the transformer 7a to the information transmission path 1a, and the transmitter 9b inputs the signal current. The signal current modulated by the train control information is sent to the primary coil of the transformer 7b, and the signal current I2 is sent from the secondary coil of the transformer 7b to the information transmission path 1b. The signal current I1 transmitted to the information transmission path 1a flows from the secondary coil of the transformer 7a through the DC blocking capacitor 8 through the rail 6L from the rail boundary C2 toward the rail boundary C1, and the signal transmitted to the information transmission path 1b. The current I2 flows from the secondary coil of the transformer 7b through the DC blocking capacitor 8 toward the rail boundary C2 from the rail boundary C3.

  The receiver 14 of the on-board device 4a of the train 3a that has entered the track circuit 1T receives the signal current I1 transmitted to the rail 6L of the information transmission path 1a via the transmission / reception coil 5a, and from the received signal current I1. Train control information is extracted and sent to the processing unit 15. The processing unit 15 determines that the train 3a has entered the track circuit 1T when detecting the position information of the rail boundary C1 on the train approach side and the identification number of the track circuit 1T included in the train control information being sent, and determines that the train 3a has entered the track circuit 1T. The current position of the train 3a is calculated by adding the signals from the speed generator to the position information, and the distance to the preceding train 3b is calculated from the calculated current position and the preceding train position information included in the train control information. Calculate and output the speed limit according to the deceleration performance. The receiver 14 of the on-board device 4b of the train 3b on the track circuit 2T receives the signal current I2 transmitted to the rail 6L of the information transmission path 1b via the transmission / reception coil 5b, and receives the received signal current. Train control information is extracted from I2 and sent to the processing unit 15. The processing unit 15 calculates and outputs the speed limit of the train 3b based on the train control information sent.

  Since the signal currents I1 and I2 transmitted to the rail 6L received by the on-board devices 4a and 4b are substantially constant without being affected by a short circuit caused by the axles 16a and 16b of the trains 3a and 3b, The fluctuation in the reception level of 4b can be reduced, and the train control information transmitted from the ground devices 2a and 2b can be stably received.

  Further, the signal currents I1 and I2 transmitted to the rail 6L of the information transmission paths 1a and 1b flow to the rear of the trains 3a and 3b even if the rails 6L and 6R are short-circuited by the axles 16a and 16b. The train 3a enters the track circuit 2T where the train 3b is located, for example, by transmitting the train control information to be transmitted to the train 3a and the train 3b to the signal current I2 to be transmitted from the transmitter 9b to the information transmission path 1b. Even so, the signal current I2 can be received by the train 3a, and a plurality of trains 3a and 3b can be located on one track circuit 2T, so that the train 3 can be operated at high density.

  Next, processing when the train state information is transmitted from the on-board devices 4a and 4b to the ground device 2a will be described.

  The processing unit 15 of the on-board device 4a of the train 3a entering the track circuit 1T sequentially outputs train state information including the calculated own train position, train number, and traveling direction to the transmitter 13. The transmitter 13 transmits the signal current It1 modulated by the input train state information from the transmission / reception coil 5a to the rail 6L. The signal current It1 transmitted to the rail 6L flows from the rail boundary C2 of the information transmission path 1a to the DC blocking capacitor 8 and the secondary coil of the transformer 7a. The signal current flowing through the secondary coil of the transformer 7a is received by the receiver 10a of the ground device 2a via the primary coil of the transformer 7a, and the train state information is extracted from the received signal current It1 and output to the processing device 11a. To do. The processing device 11a sends the input train state information of the train 3a to the ground device behind the train traveling direction via the condition communication circuit 12. Similarly, the on-board device 4b of the train 3b entering the track circuit 2T transmits the signal current It2 from the transmission / reception coil 5b to the rail 6L of the information transmission path 1b, and the transmitted signal current It2 is transmitted to the ground device 2a. Of the train 3b is processed by the processing device 11a.

  In this way, information can be exchanged between the ground device 2a and the on-board devices 4a and 4b using the rail 6L.

  In the above description, the case where information is exchanged between the ground device 2 and the vehicle device 4 using one rail 6L has been described. However, as shown in FIG. The same signal current may be transmitted by connecting with an electric wire. Thus, the stability of transmission of train control information and train state information can be improved by transmitting the same signal current to the left and right rails 6L and 6R.

  As shown in FIG. 2, when the train 3a and the train 3b are present on the track circuit 2T, the signal current It2 transmitted from the onboard device 4b of the train 3b, for example, to the rail 6L of the information transmission path 1b is supplied to the train 3a. Information can be exchanged between the trains 3 by receiving the signals on the on-board device 4a.

  The signal currents I1 and I2 and the signal currents It1 and It2 flowing in the information transmission paths 1a and 1b flow in one direction of the rail 6L, are in the same direction as the return current, and are affected by noise such as the return current. In order to withstand this noise and ensure a code error rate equal to or higher than that without lowering the transmission rate, it is desirable to use a spread spectrum system in which the signal current flowing through the rail 6L is excellent in noise resistance.

Furthermore, as shown in FIG. 3, different signal currents may be transmitted to the left and right rails 6L and 6R. In this case, the information transmission paths 1aL to 1dL using the rail 6L and the information transmission paths 1aR to 1dR using the rail 6R are provided, and the information transmission path 1aL of the track circuit 1T and the information transmission path of the track circuit 2T are provided on the ground device 2a. 1bL, a transmitter 9 and a receiver 10 for transmitting and receiving a signal current, an information transmission path 1aR of the track circuit 1T, an information transmission path 1bR of the track circuit 2T, and a transmitter 9 and a receiver 10 for transmitting and receiving a signal current, The ground device 2b includes an information transmission path 1cL of the track circuit 3T, an information transmission path 1dL of the track circuit 4T, a transmitter 9 and a receiver 10 for transmitting and receiving a signal current, an information transmission path 1dR of the track circuit 3T, and a track circuit 2T. An information transmission path 1dR is provided with a transmitter 9 and a receiver 10 for transmitting / receiving a signal current, and an on-board device 4 is also provided with a transmitter 13 and a receiver 14 for transmitting / receiving a signal current to / from the information transmission path 1aL-1dL, and information transmission The receiver 14 is provided with a transmitter 13 for exchanging 1aR~1dR and signal currents, left and right rails 6L, it may be flowed different signal current to 6R. In this case, as shown in FIG. 3, the ground device 2a, 2b from the information transmission path 1aL~1dL information transmission path 1aR~1dR different frequencies _{f 1} and a signal modulated by a different spreading code _{PN 1 to 6} frequency _{f 2} By transmitting the current and transmitting the signal current modulated by the spreading codes PN ₃ to ₅ different from the on-board devices 4a and 4b with the frequency f ₃ different from that of the ground devices 2a and 2b, a lot between the ground and the train 3 is transmitted. Information can be transmitted and received stably.

  As shown in FIG. 3, when the train 3a and the train 3b are on the track circuit 2T and the train control information is transmitted from the ground device 2a to the train 3a and the train 3b, the signal transmitted from the ground device 2a is By dividing and dividing into a plurality of time slots, the train control information can be transmitted to the plurality of trains 3a and 3b. In this case, when establishing the connection, it is possible to prevent collisions by assigning trains 3a and 3b using the unique numbers and train numbers, tracking the train, and using random numbers.

  In addition, since different signal currents are transmitted to the left and right rails 6L and 6R, the information transmission paths 1aL to 1dL and the information transmission paths 1aR to 1dR may overlap as shown in FIG. As described above, by overlapping the information transmission paths 1aL to 1dL and the information transmission paths 1aR to 1dR, it is possible to eliminate the no-signal state at the boundary between the track circuits 1T to 4T and to secure the time necessary for establishing the connection and the synchronization state. Can be maintained.

  In the above description, a case has been described in which a signal current including train control information and a signal current including train state information are transmitted to the information transmission paths 1aL to 1dL and the information transmission paths 1aR to 1dR. The signal current including the train control information may be transmitted to ˜1 dL, and the signal current including the train state information may be transmitted to the other information transmission paths 1 a R to 1 dR. As described above, by transmitting the signal current including the train control information and the signal current including the train state information through different information transmission paths, the ground device 2 and the on-board device 4 can stably transmit and receive information.

  In addition, a branching device is provided on a railway track at a station or a vehicle place. The track circuit including the branching device is constructed by inserting insulation. Therefore, for example, as shown in FIG. 5, a rail bond 20 for passing a signal current is connected to the tregreil part at a place where the branching device of the line branched to the first line, the second line, and the third line exists, and the crossing part is connected. By providing the rail insulation 21 that insulates the branch line side and the reference line side, and configuring the information transmission path 1 that allows different signal currents to flow in the left and right rails L and R of the first line, the second line, and the third line, A so-called non-insulated track circuit that is not used can be realized. Further, if there is little information to be transmitted and the same signal current is allowed to flow in the left and right rails L and R, the rail bond 20 and the rail insulation 21 can be eliminated, so that no insulation can be achieved.

It is a block diagram which shows the structure of the information transmission apparatus of this invention. It is a block diagram which shows the structure of a 2nd information transmission apparatus. It is a block diagram which shows the structure of a 3rd information transmission apparatus. It is a block diagram which shows the structure of a 4th information transmission apparatus. It is a block diagram which shows the structure of a 5th information transmission apparatus. It is a block diagram which shows the structure of the track circuit conventionally.

Explanation of symbols

1; Information transmission path, 2; Ground device, 3; Train, 4; On-board device, 5;
6; rail, 7; transformer, 8; DC blocking capacitor, 9; transmitter, 10; receiver,
11; Processing device, 12; Condition communication circuit, 13; Transmitter, 14; Receiver,
15; Processing part, 16; Axle, 20; Rail bond, 21; Rail insulation.

Claims (5)

An information transmission path provided in a track circuit having a rail as a part of an electric circuit , a ground device, and an on-board device mounted on a train,
It said information transmission path, divides the rail to multiple sections consist closed circuit DC blocking capacitor and the transformer secondary coil and one side of the rails are connected in series of the pair of the rails of each section,
The ground device includes a transmitter and a receiver connected to a primary coil of a transformer of the information transmission path, and the transmitter transmits a signal including train control information to the information transmission path, and receives the signal. The device receives a signal including train state information transmitted from the on-board device to the information transmission path,
The on-board device has a transmitter and a receiver, and the transmitter transmits a signal including train state information from a transmission / reception coil to the information transmission path, and the receiver is transmitted to the information transmission path. An information transmission device that receives a signal including train control information from a transmission / reception coil. The processing device of the ground device mutually transmits the train state information and the processing device of the adjacent ground device, and is transmitted from the processing device of the ground device adjacent to the train state information received by the receiver and the train traveling direction. Generate train control information including boundary position information obtained by dividing the preceding train position information and rails from the train state information and output to the transmitter,
The processing unit of the on-board device calculates the train speed limit based on the train control information received by the receiver and outputs the train speed limit to the speed control unit, and the train state information including the own train position, the train number, and the traveling direction. The information transmission apparatus according to claim 1, wherein the information transmission apparatus is generated and output to the transmitter. 3. The information transmission path comprises two closed circuits in which a DC blocking capacitor and a secondary coil of a transformer are connected in series to a pair of rails in each section obtained by dividing the rail into a plurality of sections. The information transmission apparatus described. The information transmission device according to claim 3 , wherein train control information is transmitted to one of the two closed circuits of the information transmission path, and train state information is transmitted to the other. The transmitter of the ground device transmits to spread spectrum modulation train control information, the transmitter of the vehicle on the device information according to any one of claims 1 to 4 transmits the train status information spread spectrum modulation to Transmission equipment.

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