JP4785938B2 - Ground / vehicle information transmission apparatus and ground / vehicle information transmission method - Google Patents

Description

  The present invention relates to a ground-to-vehicle information transmission apparatus and a ground-to-vehicle information transmission method for transmitting speed limit information to a train from the ground.

  In order to automatically control the speed of the train below the speed limit, the train control signal wave (ATC signal wave) determined from the stop target position determined by the position of the preceding train and the conditions of the route, etc. The on-board device is transmitted to the train, and the train is continuously decelerated based on the verification speed pattern to the stop target position calculated from the received ATC signal wave.

  As the conventional ATC signal wave transmitted from the ground to the train, for example, as disclosed in Patent Document 1, an analog signal system is adopted. In this analog signal system, as shown in the waveform diagram of FIG. 4, an analog signal wave 23 that changes the period of amplitude modulation of an overmodulated square wave according to information to be transmitted is transmitted as an ATC signal wave. In this analog signal system, there is a limit to the amount of information to be transmitted, and it was ground-based control that only controlled the train speed of each travel section.

  In recent years, as disclosed in Patent Document 2, by transmitting as an ATC signal wave using a digital signal such as MSK (Minimum Shift Keying) modulation, the amount of information is expanded and the stop point is continuously increased according to the train performance. Therefore, the shift to on-vehicle main control that performs speed control is being promoted.

  When shifting from the analog signal system used so far to the digital signal system, the digital signal wave with a frequency band different from that of the analog signal is superimposed, or the ground equipment and the on-board equipment using the analog signal frequency band. Either of these methods was switched to the digital signal system all at once.

  In the former, it is necessary to select a new frequency band. For example, in a mutual service line area, it is necessary to avoid the train control frequency used in the service line area, so it is difficult to select a new frequency band. there were. In the latter case, since the ground equipment and the on-vehicle equipment are switched at the same time, there are problems that a large amount of cost is required for switching the equipment and that a new method cannot be inspected in advance.

  This invention solves such problems, and when changing an existing analog signal system to a digital signal system, there is no need to select a new frequency band, and a conventional analog signal system train and a new digital signal system An object of the present invention is to provide a ground-on-vehicle information transmission apparatus and a ground-on-vehicle information transmission method capable of transmitting and controlling information on any train from the ground.

The ground-to-vehicle information transmission device according to the present invention is a ground-to-vehicle information transmission device that transmits a signal wave from a transmitter connected to one boundary of a track circuit and transmits the signal wave to a receiver mounted on a train. The transmitter has a digital modulation wave generation unit, an analog modulation wave generation unit, an amplitude modulation unit, and a transmission unit, and the digital modulation wave generation unit generates a digital modulation wave according to train control information, and The analog modulation wave generation unit generates an analog modulation wave having a frequency according to train control information, and the amplitude modulation unit generates the digital modulation wave generated by the digital modulation wave generation unit by the analog modulation wave generation unit. Amplitude modulation is performed with an analog modulation wave with a modulation factor of approximately 2/3 to generate a train control signal wave, and the transmission unit transmits the signal wave generated by the amplitude modulation unit to the track circuit. .

  When the receiver mounted on the train is configured with an analog signal system, it detects the amplitude modulation component of the signal wave and demodulates the analog signal, and when it is configured with a digital signal system, the received signal A digital modulation component is detected from the wave to demodulate the digital signal.

The ground-to-vehicle information transmission method according to the present invention is a ground-to-vehicle information transmission method for transmitting a signal wave from one boundary of a track circuit and transmitting it to a train. An analog modulation wave is generated, and the generated digital modulation wave is amplitude-modulated with a modulation factor of approximately 2/3 by the generated analog modulation wave to generate a train control signal wave, and the generated continuous wave signal wave is converted into the track circuit. It is characterized by transmitting to.

  The present invention generates a digital modulation wave and an analog modulation wave according to train control information, and amplitude-modulates the generated digital modulation wave with a modulation degree of about 2/3 by the generated analog modulation wave. And the generated continuous wave signal wave is generated, and the generated continuous wave signal wave is transmitted to the track circuit. Therefore, the conventional train having the analog signal type receiver and the digital signal type receiver are provided. Any new train can receive ATC signal waves transmitted from a transmitter and extract train control information.

  In addition, it is not necessary to select a new frequency band, and it is possible to shift from an analog signal system to a digital signal system using the existing frequency band even in a line section where mutual entry is made. Furthermore, even in a line section where the operation density is high and the AF frequency usage is large, such as a railroad near a metropolitan area where a railroad crossing control or the like is necessary, the analog signal system can be shifted to the digital signal system.

  In addition, when shifting from an analog signal system to a digital signal system, a pre-inspection can be performed before use, and a trial operation using the digital signal system can be performed reliably.

  In addition, if the receiver mounted on the train is configured with an analog signal system, it detects the amplitude modulation component of the signal wave and demodulates the analog signal, and if it is configured with a digital signal system, the received signal By detecting the digital modulation component from the wave and demodulating the digital signal, the train control information transmitted from the ground can be reliably received by the train.

It is a block diagram which shows the structure of the ground-vehicle information transmission apparatus of this invention. It is a block diagram which shows the structure of a vehicle-mounted apparatus. It is a schematic diagram which shows the signal wave produced | generated with a transmitter. It is a schematic diagram which shows the signal wave of the conventional analog signal system.

  FIG. 1 is a block diagram showing the configuration of the ground-to-vehicle information transmission apparatus of the present invention. The ground-to-vehicle information transmission device has an on-vehicle device 3 mounted on the ground device 1 and the train 2, detects the position of the train 1 by the ground device 1, and transmits speed control information and the like to the train 1. Then, the speed of the train 1 is controlled below the speed limit.

  The ground device 1 includes a transmitter 4 connected to the train entry side boundary of each track circuit 1T to 4T and a receiver 5 connected to the train entry side boundary of each track circuit 1T to 4T. The transmitter 4 includes a digital modulation wave generation unit 6, an analog modulation wave generation unit 7, an amplitude modulation unit 8, and a transmission unit 9. The digital modulation wave generation unit 6 inputs a route condition such as position information of a preceding train sent via the condition communication circuit 10 and has a constant amplitude according to speed limit information for controlling the speed of the train 1. Generate a modulated wave. The analog modulated wave generator 7 inputs a route condition such as position information of a preceding train sent via the condition communication circuit 10 and generates an analog modulated wave according to speed limit information for controlling the speed of the train 1. To do. The amplitude modulation unit 8 amplitude-modulates the digital modulation wave having a constant amplitude generated by the digital modulation wave generation unit 6 with an analog modulation wave generated by the analog modulation wave generation unit 7 with a modulation factor of about 2/3 to generate an ATC signal wave. Generate. The transmission unit 9 transmits the ATC signal wave generated by the amplitude modulation unit 8 to each of the track circuits 1T to 4T. The receiver 4 detects whether or not the train 2 is on the corresponding track circuit based on whether or not the ATC signal wave transmitted to each track circuit 1T to 4T is received.

  As shown in the block diagram of FIG. 2, the on-board device 3 includes a receiver 11, an arithmetic processing unit 12, a speed checking unit 13, and a speed control unit 14. The receiver 11 includes a receiving unit 15 and a demodulating unit 16 and receives and demodulates ATC signal waves transmitted to the track circuits 1T to 4T via the vehicle upper member 17. The arithmetic processing unit 12 refers to the speed control information included in the ATC signal wave received by the receiver 11 and creates the speed pattern of the train 2. The speed checking unit 13 checks the speed pattern created by the arithmetic processing unit 12 against the speed of the train 2. The speed control unit 14 controls the brake device and the like according to the check result of the speed check unit 13 so that the speed of the train 2 is equal to or lower than the speed limit.

  The transmission state when the ATC signal wave is transmitted from the transmitter 4b of the ground device 1 to the track circuit 2T where the train 2 is present and received by the on-board device 3 to control the speed of the train 2 is a waveform diagram of FIG. Will be described with reference to FIG.

  As shown in FIG. 3, the digital modulation wave generation unit 6 of the transmitter 4b connected to the track circuit 2T generates a digital modulation wave 20 with a constant amplitude corresponding to the speed limit information and the like, and outputs it to the amplitude modulation unit 8 To do. As shown in FIG. 3, the analog modulated wave generator 7 generates an analog modulated wave 21 according to speed limit information and outputs the analog modulated wave 21 to the amplitude modulator 8. The amplitude modulation unit 8 amplitude-modulates the digital modulation wave 20 input from the digital modulation wave generation unit 6 with an analog modulation wave 21 input from the analog modulation wave generation unit 7 with a modulation degree of about 2/3, as shown in FIG. As described above, the ATC signal wave 22 is generated and output to the transmission unit 9. The transmitter 9 transmits the input ATC signal wave 22 to the track circuit 2T.

  The receiver 5b connected to the track circuit 2T detects that the train 2 is not on the track circuit 2T by receiving the ATC signal wave transmitted to the track circuit 2T, and the train 2 is connected to the track circuit 2T. When the ATC signal transmitted after entering the vehicle is not received, it is detected that the train 2 is on the track circuit 2T.

  When the train 2 is present on the track circuit 2T and the receiver 11 of the on-board device 3 receives the ATC signal wave transmitted to the track circuit 2T via the vehicle upper member 17, the received ATC signal wave is demodulated. Train control information is extracted and output to the arithmetic processing unit 12. When the receiver 11 receives the ATC signal wave and the receiver 11 is configured by the conventional analog signal system, the analog signal is demodulated by detecting the amplitude modulation component of the received ATC signal wave. Further, when the receiver 11 is configured by a digital signal system, a digital modulation component is detected from the received ATC signal wave to demodulate the digital signal.

  In this way, the train control information is received by receiving the ATC signal wave transmitted from the transmitter 4b in both the conventional train 2 having the analog signal receiver 11 and the new train 2 having the digital signal receiver 11. Can be extracted. In addition, it is not necessary to select a new frequency band, and it is possible to shift from an analog signal system to a digital signal system even in a line section in which the frequency bands are mutually connected.

1; ground device, 2; train, 3; on-board device, 4; transmitter, 5; receiver,
6; digital modulation wave generation unit, 7; analog modulation wave generation unit, 8; amplitude modulation unit, 9; transmission unit,
10; Condition communication circuit, 11; Receiver, 12; Arithmetic processing unit, 13; Speed check unit,
14; Speed control unit, 15; Reception unit, 16; Demodulation unit, 17;

Japanese Patent No. 3533724 JP 2001-219849 A

Claims (3)

In the ground-on-vehicle information transmission device that transmits a signal wave from the transmitter connected to one boundary of the track circuit and transmits it to the receiver mounted on the train,
The transmitter has a digital modulation wave generation unit, an analog modulation wave generation unit, an amplitude modulation unit, and a transmission unit,
The digital modulation wave generation unit generates a digital modulation wave according to train control information, the analog modulation wave generation unit generates an analog modulation wave with a frequency according to train control information, and the amplitude modulation unit includes: The digital modulation wave generated by the digital modulation wave generation unit is amplitude-modulated with a modulation factor of approximately 2/3 by the analog modulation wave generated by the analog modulation wave generation unit to generate a train control signal wave, and the transmission unit is An information transmission apparatus between the ground and the vehicle, wherein the signal wave generated by the amplitude modulation unit is transmitted to the track circuit.   When the receiver mounted on the train is configured with an analog signal system, it detects the amplitude modulation component of the signal wave and demodulates the analog signal, and when it is configured with a digital signal system, the received signal The ground-to-vehicle information transmission apparatus according to claim 1, wherein the digital signal is detected by detecting a digital modulation component from the wave. In the ground-to-vehicle information transmission method for transmitting a signal wave from one boundary of the track circuit to the train,
Generates a digital modulation wave and an analog modulation wave according to train control information, and generates a train control signal wave by modulating the amplitude with a modulation factor of approximately 2/3 by the generated analog modulation wave. A ground-to-vehicle information transmission method characterized by transmitting a continuous wave signal wave to the track circuit.

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