JP4845985B2 - Train control signal generation method, signal transmission device, on-board arithmetic processing device, and train control method - Google Patents

Description

The present invention relates to a method for generating a train control signal to be transmitted from the ground to a train, a main / sub digital / analog signal transmission device, a main / sub digital / analog signal on-board arithmetic unit, and a train control method.

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

  The conventional train control signal transmitted from the ground to the train, for example, as shown in Non-Patent Document 1, etc., is an analog signal system in which the main signal and the sub signal composed of two AF frequency bands are respectively amplitude-modulated and combined, For example, as shown in Patent Document 1, a digital signal system in which a single frequency is digitally modulated such as MSK (Minimum Shift Keying) modulation is used.

  In addition, a shift to the on-board main control method is being promoted to increase the amount of information transmitted from the ground to the train and perform speed control continuously to the stop point according to the train performance. As shown in Non-Patent Document 2, etc., the on-board main control train speed control method is such that the on-board device receives and decodes a train control signal transmitted from the ground via a transmission line such as a track circuit. Calculates the optimum train speed to the preceding train based on train control information for ensuring safety such as signal display information and fixed information such as track gradient and curve radius registered in on-vehicle non-volatile storage media such as ROM The train is controlled by the calculated optimum train speed.

  In addition, the on-board device includes train control information for ensuring safety such as signal display information received and decoded from a train control signal transmitted from the ground via a transmission path such as a track circuit, a track circuit, etc. Prior to transmission via the transmission line, the optimal train speed to the preceding train is calculated using fixed information such as the track gradient and curve radius transmitted by an information transmission device such as a transponder, and train control is performed using the calculated optimal train speed. A train control system is also adopted.

  In addition, change information that changes from the ground via the track circuit and other transmission routes, such as the position of the preceding train and the opening of the route, fixed information about the track structure such as track gradient and curve radius, and temporary speed limit information associated with construction The train control information to receive the signal consisting of information such as the on-board device and decode it, and to ensure the decoded safety and train control information effective to shorten the train interval such as track gradient and curve radius A train control system is also employed in which train control is performed at the optimum train speed up to the preceding train obtained by the above calculation.

  In order to shift from the analog signal system used so far to the digital signal system, it is necessary to newly select a digital signal having a frequency band different from that of the analog signal. Because it is necessary to avoid the train control frequency used in Japan, it was difficult to select a new frequency band. In addition, when an analog signal and a digital signal wave are superimposed and transmitted, the on-board device needs to receive and demodulate both signals at the same time, which increases the number of devices such as a transceiver on the ground and on the vehicle.

  In order to avoid this, adopting a method that converts the frequency band of analog signals to digital signals and switches the ground equipment and on-board equipment to the digital signal system at the same time, all the vehicles and all the vehicles that run in the mutual entry line section It is necessary to replace the ground equipment from analog signal system to digital signal system at the same time, and it is necessary to switch the equipment repeatedly, and it is necessary to repeatedly switch the digital signal system before the start of use for the new system test. There is a problem that the work is not easy.

  In addition, if you switch from analog signal system to digital signal system in some sections of the mutual entry line section and do not switch from analog signal system to digital signal system in other line sections, If the vehicle is equipped with on-board equipment that has both analog signal system and digital signal system functions, or all vehicles must be replaced with vehicles equipped with on-board equipment that has both analog signal system and digital signal system functions, There is a problem that it becomes impossible to travel in the mutual service line section.

  In addition, train control information to ensure safety such as signal display information transmitted from the ground via a transmission line such as a track circuit, and track gradients and curve radii registered in the on-vehicle nonvolatile storage medium The train speed control method that calculates the optimal train speed up to the preceding train based on the information of the vehicle is the control registered in the on-vehicle non-volatile storage medium when the fixed information such as the track gradient and curve radius due to track repair etc. is changed There is a problem in that it is necessary to change the data for all the vehicles traveling in the changed part at the same time and to check the changed contents, and it is not easy to rewrite the on-vehicle nonvolatile storage medium.

  In addition, in the method of transmitting fixed information such as a track gradient and a curve radius to an on-board device by an information transmission device such as a transponder, it is necessary to install many information transmission devices such as a transponder, which increases the amount of equipment. is there.

  In addition, change information that changes due to the position of the preceding train, opening of the route, etc., as well as information such as fixed information about the track structure such as track gradient and curve radius, and temporary speed limit information related to construction, etc. are transmitted via transmission lines such as track circuits. In this method, the train control signal to be transmitted becomes longer than the signal transmission speed of the transmission line such as the track circuit, the signal transmission time becomes longer, the train control during that time becomes impossible, and the train cannot run. There is a problem.

The present invention solves such a problem, and when changing an existing analog signal system to a digital signal system, switching from an analog signal system to a digital signal system in a part of the mutual entry line section, Even if it is not possible to switch from analog signal system to digital signal system in the line section, information from both the conventional analog signal system train and the new digital signal system train is available from the ground without the need to select a new frequency band. It is possible to control the train speed optimally even if the train control signal to be transmitted is longer than the signal transmission speed of the transmission line such as the track circuit with a simple configuration. An object of the present invention is to provide a train control signal generation method , a signal transmission device, an on-board arithmetic processing device, and a train control method.

The train control signal generation method according to the present invention comprises two AF frequency bands, and a sub-signal signal frequency of a main signal analog modulated wave corresponding to the speed information and a sub-signal signal frequency corresponding to the speed information. The main signal digital modulation wave consisting of change information that changes due to the position of the preceding train, the opening of the route, etc. due to the signal analog modulation wave, the information about the track structure such as the track gradient and curve radius, and the secondary information consisting of fixed information such as temporary speed limit information It is characterized by combining a main signal digital / analog signal and a sub signal digital / analog signal obtained by amplitude-modulating a signal digital modulation wave with a modulation factor of about 2/3.

  A signal transmission apparatus according to the present invention includes a main signal digital modulation wave generation unit that generates a digitally modulated main signal digital modulation wave, a main signal analog modulation wave generation unit that generates an analog modulation wave of a predetermined frequency, and a main signal digital A main signal digital / analog signal generation unit comprising a main signal amplitude modulation unit for amplitude-modulating the main signal digital modulation wave generated by the modulation wave generation unit with the main signal analog modulation wave generated by the main signal analog modulation wave generation unit; A sub-signal digital modulation wave generation unit that generates a digitally modulated sub-signal digital modulation wave, a sub-signal analog modulation wave generation unit that generates an analog modulation wave of a predetermined frequency, and a sub-signal generated by the sub-signal digital modulation wave generation unit A sub-signal comprising a sub-signal amplitude modulation unit that modulates the signal digital modulation wave with the sub-signal analog modulation wave generated by the sub-signal analog modulation wave generation unit Train control by combining the digital signal / analog signal generated by the digital signal / analog signal generator and the digital signal / analog signal generated by the digital signal / analog signal generator. A main / sub digital / analog signal combination unit for generating a signal and a transmission unit for transmitting a train control signal combined by the main / sub digital / analog signal combination unit to a track circuit.

  The on-vehicle reception calculation device of the present invention is an on-vehicle reception calculation device that receives a train control signal transmitted from the signal transmission device, wherein the train control signal transmitted from the signal transmission device is a main / sub analog signal. A digital / analog signal separating unit that separates the main / sub digital signal, an analog demodulating unit that demodulates the main / sub analog signal separated by the digital / analog signal separating unit, and an allowable running speed by decoding the demodulated main / sub analog signal An analog arithmetic processing unit for determining the frequency, a digital demodulating unit for demodulating the main / sub digital signal separated by the digital / analog signal separating unit, and a digital arithmetic processing for decoding the demodulated main / sub digital signal and calculating an allowable traveling speed To determine the allowable speed of the train by comparing the allowable running speed from the analog arithmetic processing unit and the digital arithmetic processing unit, And having a speed Shosa unit for Shosa the degree and the train actual traveling speed.

  According to the train control method of the present invention, the main signal digital modulation wave and the sub signal digital modulation wave are amplitude-modulated with a modulation factor of about 2/3 by the main signal analog modulation wave and the sub signal analog modulation wave having two AF frequency bands. The main signal digital / analog signal and the sub signal digital / analog signal are combined, and the digital information of the main signal digital / analog signal is changed to change according to the position of the preceding train or the opening of the route, etc. A train control signal is sent from the ground to the train with digital information as information on the track structure, such as track gradient and curve radius, and fixed speed limit information, etc., and the train control signal received on the train is the main and sub analogs. The signal is separated into the main and sub digital signals, the separated main and sub analog signals are demodulated, and the demodulated main and sub analog signals are decoded and allowed to run Determines the speed and demodulates the separated main and sub digital signals, decodes the demodulated main and sub digital signals, calculates the allowable travel speed, decodes the main and sub analog signals, and determines the allowable travel speed and the main and sub digital signals The allowable traveling speed is calculated by comparing the calculated allowable traveling speed, and the train speed is controlled by checking the determined allowable speed and the actual traveling speed of the train.

  The present invention is a main signal digital generated by amplitude-modulating a main signal digital modulated wave having change information that changes depending on the position of the preceding train, opening of a route, etc., with an analog signal wave used in a conventional analog ATC signal.・ Analog signal wave and sub-signal digital modulation wave consisting of fixed information such as information on line structure such as line gradient and curve radius of the corresponding section and temporary speed limit information, etc. used for conventional ATC signal Because the train control signal wave is composed by combining the sub-signal digital / analog signal wave generated by amplitude modulation by the, both the conventional train with the function of the analog signal system and the new train with the function of the digital signal system Train control can be performed by receiving a train control signal.

  In addition, there is no need to select a new frequency band, switching from analog signal system to digital / analog signal system in some sections of the mutual entry line section, and analog signal system to digital / analog signal system in other sections. Even if it is not possible to switch to the train, trains that are transmitting from the ground of each line section where both the onboard device with only the analog signal system function and the onboard device with the digital analog signal system function are on board A control signal can be received.

  In addition, since the digital signal of the train control signal includes change information that changes due to the position of the preceding train, route opening, etc., information on the track structure such as track gradient and curve radius, and fixed information such as temporary speed limit information Even if the fixed information is changed due to the above or the like, it is only necessary to change and test the information of the ground device corresponding to the portion, and the fixed information can be easily changed.

  In addition, it is not necessary to provide an information transmission device such as a transponder that transmits information on the track structure such as the track gradient and the curve radius and fixed information such as temporary speed limit information, and the equipment cost can be reduced.

  Furthermore, even if the train control signal is transmitted via a track circuit that restricts the length of the telegram of the train control signal, it is included in the train control signal immediately after entering the track circuit with few restrictions such as speed control. Receives digital signal change information, performs train control such as the minimum required train speed, receives fixed information contained in the train control signal before approaching the speed restriction point of the preceding train etc. Reasonable train control can be performed by switching to the optimal train control based on the radius or the like.

It is a block diagram which shows the structure of the information transmission system between the ground and a train. It is a block diagram which shows the structure of the transmitter of a ground apparatus. It is a block diagram which shows the structure of a vehicle-mounted apparatus. It is a schematic diagram which shows the structure of the train control signal wave produced | generated with the transmitter of a ground apparatus. It is a frame block diagram of the digital signal transmitted with the transmitter of a ground apparatus.

  FIG. 1 is a block diagram showing a configuration of an information transmission system that exchanges information such as train control signals between the ground and a train. As shown in the figure, the information transmission system has an on-vehicle device 3 mounted on the ground device 1 and the train 2, detects the position of the train 1 with the ground device 1, and sends a speed control signal or the like to the train 1. It transmits and controls the speed of the train 1 below the speed limit.

  The ground device 1 includes transmitters 4a to 4c connected to boundaries on the train advance side of the track circuits 1T to 4T, and receivers 5a to 5d connected to boundaries on the train approach side of the track circuits 1T to 4T. , Information related to the track structure such as the track gradient and curve radius of the section of the condition circuit 6 and the track circuits 1T to 4T that send change information to the transmitters 4a to 4c, which changes according to the position of the preceding train, the route opening, etc. It has a fixed information registration unit 7 in which information such as restriction information (hereinafter referred to as fixed information) is registered.

  As shown in the block diagram of FIG. 2, the transmitters 4a to 4c include a main signal digital / analog signal generation unit 8, a sub signal digital / analog signal generation unit 9, a main sub digital / analog signal combination unit 10, and a transmission unit 11. Have

  The main signal digital / analog signal generation unit 8 includes a main signal analog modulation wave generation unit 10, a main signal digital modulation wave generation unit 11, and a main signal amplitude modulation unit 12. The main signal analog modulated wave generation unit 10 generates a main signal analog modulated wave having the signal frequency of the main signal corresponding to the speed information from the change information sent via the condition communication circuit 6, for example, as shown in the following table. .

  The main signal digital modulation wave generation unit 11 generates a main signal digital modulation wave composed of change information sent via the condition communication circuit 6. The main signal amplitude modulation unit 12 modulates the main signal digital modulation wave generated by the main signal digital modulation wave generation unit 11 with the modulation factor of about 2/3 by the main signal analog modulation wave generated by the main analog modulation wave generation unit 10. Thus, a main signal digital / analog signal wave is generated.

  The sub-signal digital / analog signal generation unit 9 includes a sub-signal analog modulation wave generation unit 13, a sub-signal digital modulation wave generation unit 14, and a sub-signal amplitude modulation unit 15. The sub-signal analog modulated wave generating unit 13 generates a sub-signal analog modulated wave having the signal frequency of the sub signal corresponding to the speed information from the change information sent via the condition communication circuit 6. The sub-signal digital modulated wave generation unit 14 reads the fixed information registered in the fixed information registration unit 7 and generates a sub-signal digital modulation wave. The sub-signal amplitude modulation unit 15 amplitudes the sub-signal digital modulation wave generated by the sub-signal digital modulation wave generation unit 14 with a modulation factor of about 2/3 by the sub-signal analog modulation wave generated by the sub-signal analog modulation wave generation unit 13. Modulates to generate a sub-signal digital / analog signal wave.

  The main / sub digital / analog signal combination unit 10 generates a train control signal wave by combining the main signal digital / analog wave generated by the main signal amplitude modulation unit 12 and the sub signal digital / analog wave generated by the sub signal amplitude modulation unit 15. To do. The transmission unit 11 transmits the train control signal wave generated by the main / sub-digital / analog signal combination unit 10 to each track circuit 1T to 4T. The receiver 4 detects whether or not the train 2 is present on the corresponding track circuit based on whether or not the train control signal wave transmitted to each track circuit 1T to 4T is received.

  In some line sections, the ground device 1 may be switched from an analog signal system to a digital / analog signal system, and in other line sections, an analog signal system ground device may be used. As shown in the block diagram of FIG. 3A, the on-board device 3 of the train 2 that has the function of the conventional analog signal system in the mutual line segment and travels in the mutual line segment, An analog arithmetic processing unit 17, a speed checking unit 18, and a speed control unit 19 are included. The receiver 16 has a receiver 20 and an analog demodulator 21. The receiving unit 20 receives the train control signal wave transmitted to the track circuits 1T to 4T via the vehicle upper member 22. The analog demodulation unit 21 demodulates the main signal analog modulation wave and the sub signal analog modulation wave of the train control signal wave received by the reception unit 20. The analog arithmetic processing unit 17 decodes the main signal and the sub signal of the analog signal demodulated by the analog demodulating unit 21 and determines the allowable traveling speed. The speed checking unit 17 compares the allowable traveling speed determined by the analog arithmetic processing unit 17 with the speed of the train 2 for checking. The speed control unit 18 controls the brake device and the like based on the check result of the speed check unit 17 so that the speed of the train 2 is less than or equal to the speed limit.

  In addition, when the line device 1 is switched from the analog signal system to the digital / analog signal system in some line sections in the mutual service line section, and the ground apparatus 1 is used in the analog signal system in other line sections, the digital / analog signal system is used. As shown in the block diagram of FIG. 3B, the on-board device 3a of the train 2 that has the above functions and runs in the mutual service line section has a receiver 16a, an analog arithmetic processing unit 17, and a digital arithmetic processing unit 23. And a speed check unit 18a and a speed control unit 19. The receiver 16 a includes a receiving unit 20, a digital / analog signal separating unit 24, an analog demodulating unit 21, and a digital demodulating unit 24. The receiving unit 20 receives the train control signal wave transmitted to the track circuits 1T to 4T via the vehicle upper member 22. The digital / analog signal separation unit 24 separates the train modulation signal wave received by the reception unit 20 from the analog modulation wave and the digital modulation wave, outputs the separated analog modulation wave to the analog demodulation unit 21, and digitally demodulates the digital modulation wave. To the unit 25. The analog demodulator 21 demodulates the main signal analog modulated wave and the sub signal analog modulated wave input from the digital / analog signal separator 24. The analog arithmetic processing unit 17 decodes the main signal and the sub signal of the analog signal demodulated by the analog demodulating unit 21 and determines the allowable traveling speed. The digital demodulation unit 25 demodulates the main signal digital modulation wave and the sub signal digital modulation wave input from the digital / analog signal separation unit 24. The digital arithmetic processing unit 23 creates a speed pattern of the train 2 with reference to change information and fixed information included in the digital signal demodulated by the digital demodulation unit 25. The speed checking unit 18 a checks the allowable traveling speed determined by the analog calculation processing unit 17 or the speed indicated by the speed pattern created by the digital calculation processing unit 17 with the speed of the train 2. The speed control unit 19 controls the brake device and the like based on the check result of the speed check unit 18a so that the speed of the train 2 is equal to or lower than the speed limit.

  The transmission state when the train control 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 shown in the waveform of FIG. This will be described with reference to the drawings.

  The main signal analog modulated wave generator 10 of the 2T transmitter 4b connected to the track circuit 2T generates an analog modulated wave 31 having a main signal frequency corresponding to change information that changes depending on the position of the preceding train, the route opening, etc. The signal is output to the signal amplitude modulator 12. The main signal digital modulation wave generation unit 11 generates a main signal digital modulation wave 30 according to change information that changes depending on the position of the preceding train, the route opening, etc., and outputs the main signal digital modulation wave 30 to the main signal amplitude modulation unit 12. The main signal amplitude modulation unit 12 amplitudes the main signal digital modulation wave 30 input from the main signal digital modulation wave generation unit 12 with a modulation degree of about 2/3 by the analog modulation wave 31 input from the main signal analog modulation wave generation unit 10. The main signal digital / analog signal wave 32 is modulated and output to the main / sub digital / analog signal combination unit 10.

  The sub-signal analog modulation wave generating unit 13 generates an analog modulation wave having a sub-signal frequency corresponding to change information that changes depending on the position of the preceding train, the route opening, etc., and outputs the analog modulation wave to the sub-signal amplitude modulation unit 15. The sub-signal digital modulation wave generation unit 14 generates a sub-signal digital modulation wave corresponding to the information related to the line structure such as the line gradient and the curve radius registered in the fixed information registration unit 7 and the fixed information such as temporary speed limit information. Output to the sub-signal amplitude modulator 15. The sub-signal amplitude modulation unit 15 amplitude-modulates the sub-signal digital modulation wave input from the sub-signal digital modulation wave generation unit 14 with the modulation factor of about 2/3 by the analog modulation wave input from the sub-signal analog modulation wave generation unit 13. The sub-signal digital / analog signal wave is output to the main / sub-digital / analog signal combination unit 10.

  The main / sub digital / analog signal combination unit 10 combines the main signal digital / analog signal wave input from the main signal amplitude modulation unit 12 and the sub signal digital / analog signal wave input from the sub signal amplitude modulation unit 15 to generate a train control signal. A wave is generated and output to the transmitter 11. The transmission unit 11 transmits the train control signal wave input from the main / sub-digital / analog signal combination unit 10 to the track circuit 2T. As shown in FIG. 5, the digital signal 40 included in the train control signal wave includes a main signal digital signal 41 having change information such as a preceding train position and a sub signal digital signal 42 having fixed information related to a track structure and the like. It is generated continuously.

  The receiver 5b connected to the track circuit 2T detects that the train 2 is not on the track circuit 2T by receiving the train control signal wave 40 transmitted to the track circuit 2T. When 2 enters and is transmitted and no longer receives the train control signal wave, it is detected that the train 2 is on the track circuit 2T.

  A train 2 having a function of an analog signal system is on the track circuit 2T of the digital / analog signal system in the mutual entry line section, and the train control signal wave transmitted to the track circuit 2T by the receiver 16 of the on-board device 3 is transmitted. When received from the vehicle upper member 21, the analog modulation wave of the received train control signal wave is demodulated by the analog demodulation unit 21 and output to the analog arithmetic processing unit 17. The analog arithmetic processing unit 17 decodes the main signal and the sub signal of the analog signal demodulated by the analog demodulating unit 21 and determines the allowable traveling speed. The speed checking unit 18 compares the allowable traveling speed determined by the analog arithmetic processing unit 17 with the speed of the train 2, and the speed control unit 19 controls the brake device and the like based on the result of checking by the speed checking unit 18. Control is performed so that the speed of the train 2 is less than or equal to the speed limit.

  In addition, the train 2 having a digital / analog signal function exists on the track circuit 2T, and the train control signal wave transmitted to the track circuit 2T by the receiver 16a of the on-board device 3a is received from the onboard member 21. When the received train control signal wave is output to the digital / analog signal separating unit 24, the digital / analog signal separating unit 24 separates the received train control signal wave from the analog modulated wave and the digital modulated wave, and separates the separated analog modulated wave. Are output to the analog demodulation unit 21, and the digital modulation wave is output to the digital demodulation unit 25. The analog demodulator 21 demodulates the input main signal analog modulated wave and the sub signal analog modulated wave, and the analog arithmetic processing unit 17 decodes the main signal and sub signal of the analog signal demodulated by the analog demodulator 21 to allow an allowable traveling speed. To decide. The digital demodulator 25 demodulates the input main signal digital modulated wave and sub-signal digital modulated wave, and the digital arithmetic processor 23 refers to the change information and fixed information included in the digital signal 40 demodulated by the digital demodulator 25. Create a speed pattern for train 2. The speed checking unit 18a compares the allowable traveling speed determined by the analog arithmetic processing unit 17 with the speed indicated by the speed pattern created by the digital arithmetic processing unit 17, and the allowable traveling speed determined by the analog arithmetic processing unit 17 and the digital arithmetic processing unit. 17, the speed of the train 2 is compared with the speed of the train 2, and the speed control unit 19 controls the brake device or the like according to the result of the check of the speed check unit 18a to limit the speed of the train 2. Control so that it is below the speed.

  When the train 2 having this digital / analog signal system function is on the track of the analog signal system in the mutual entry line section, the train control signal wave transmitted from the ground does not include the digital signal wave, so analog computation The speed of the train 2 is controlled by the allowable traveling speed determined by the processing unit 17.

  In this way, the train control signal wave 40 transmitted from the transmitter 4b is transmitted by either the conventional train 2 equipped with the on-board device 3 having the analog signal function or the new train 2 having the digital / analog signal function. Receive and train optimal control. In addition, there is no need to select a new frequency band, switching from analog signal system to digital / analog signal system in some sections of the mutual entry line section, and analog signal system to digital / analog signal system in other sections. Even if it is not switched, the on-board device 3 having only the function of the analog signal system and the on-board device 3a having the function of the digital / analog signal system are transmitted from the ground of each line section in which they are interoperated. You can receive train control signal waves.

  In addition, since the digital signal 40 of the train control signal wave includes change information that changes due to the position of the preceding train, route opening, etc., information about the track structure such as the track gradient and curve radius, and fixed information such as temporary speed limit information, Even when the fixed information is changed due to track repair or the like, it is only necessary to change and test the information corresponding to that portion of the fixed information registration unit 7, and the fixed information can be easily changed. In addition, it is not necessary to provide an information transmission device such as a transponder that transmits information on the track structure such as the track gradient and the curve radius and fixed information such as temporary speed limit information, and the equipment cost can be reduced.

  Even if the train control signal wave is transmitted via a track circuit where the length of the telegram of the train control signal wave is restricted, the train control signal wave immediately after entering the track circuit with few restrictions such as speed control. Sub-signal included in the train control signal wave until the main signal digital signal 41 of the digital signal 40 included in the vehicle is received and the train control such as the minimum required train speed is performed and the speed restriction point of the preceding train is approached. Reasonable train control can be performed by receiving the digital signal 42 and switching to optimal train control based on track gradient, curve radius, and the like.

1; ground device, 2; train, 3; on-board device, 4; transmitter, 5; receiver,
6; Condition communication circuit, 7; Fixed information registration unit, 8; Main signal digital / analog signal generation unit,
9: Sub-signal digital / analog signal generation unit, 10: Main signal analog modulation wave generation unit,
11: main signal digital modulation wave generation unit, 12: main signal amplitude modulation unit,
13; Sub-signal analog modulated wave generator, 14; Sub-signal digital modulated wave generator,
15; Sub-signal amplitude modulation unit, 16; Receiver, 17; Analog arithmetic processing unit,
18; Speed check unit, 19; Speed control unit, 20; Reception unit, 21; Analog demodulation unit,
22; car upper part, 23; digital arithmetic processing unit, 24; digital / analog signal separating unit,
25: Digital demodulator.

JP 2001-219849 A

Railway and electrical technology March 2007, pages 77-83, published by Japan Railway Electrical Engineering Association. Railway and electrical technology May 2007, pages 71-76, published by Japan Railway Electrical Engineering Association.

Claims (4)

It consists of two AF frequency bands, and the main signal analog modulation wave which is the signal frequency of the main signal corresponding to the speed information and the sub signal analog modulation wave which is the signal frequency of the sub signal corresponding to the speed information, Modulation of about 2/3 of the main signal digital modulation wave consisting of change information that changes due to the opening of the route, etc., and the sub signal digital modulation wave consisting of information related to the line structure such as line gradient and curve radius and fixed information such as temporary speed limit information A train control signal generation method characterized by combining a main signal digital / analog signal and a sub-signal digital / analog signal which are amplitude-modulated at a degree . A main signal digital modulation wave generation unit that generates a digitally modulated main signal digital modulation wave, a main signal analog modulation wave generation unit that generates an analog modulation wave of a predetermined frequency, and a main signal generated by the main signal digital modulation wave generation unit A main signal digital / analog signal generation unit comprising a main signal amplitude modulation unit for amplitude-modulating the signal digital modulation wave with the main signal analog modulation wave generated by the main signal analog modulation wave generation unit;
A sub-signal digital modulation wave generation unit that generates a digitally modulated sub-signal digital modulation wave, a sub-signal analog modulation wave generation unit that generates an analog modulation wave of a predetermined frequency, and a sub-signal generated by the sub-signal digital modulation wave generation unit A sub-signal digital / analog signal generation unit including a sub-signal amplitude modulation unit that modulates the signal digital modulation wave with the sub-signal analog modulation wave generated by the sub-signal analog modulation wave generation unit;
A main sub digital / analog signal that generates a train control signal by combining the main signal digital / analog signal generated by the main signal digital / analog signal generator and the sub signal digital / analog signal generated by the sub signal digital / analog signal generator. Analog signal combination part,
A signal transmission device comprising: a transmission unit configured to transmit a train control signal combined by the main / sub-digital / analog signal combination unit to a track circuit. An on-vehicle reception arithmetic device that receives a train control signal transmitted from the signal transmission device according to claim 2,
A digital / analog signal separation unit for separating the train control signal transmitted from the signal transmission device into a main / sub analog signal and a main / sub digital signal;
An analog demodulator that demodulates the main / sub analog signal separated by the digital / analog signal separator, an analog arithmetic processor that decodes the demodulated main / sub analog signal and determines an allowable traveling speed;
A digital demodulator that demodulates the main and sub digital signals separated by the digital / analog signal separator; a digital arithmetic processor that decodes the demodulated main and sub digital signals and calculates an allowable travel speed;
It has a speed checking unit that compares the allowable traveling speed from the analog arithmetic processing unit and the digital arithmetic processing unit to determine the allowable speed of the train, and checks the determined allowable speed and the actual traveling speed of the train. An on-vehicle arithmetic processing device. A main signal digital analog signal and a sub signal which are amplitude-modulated with a modulation degree of about 2/3 of the main signal digital modulation wave and the sub signal digital modulation wave by the main signal analog modulation wave and the sub signal analog modulation wave composed of two AF frequency bands. Signal digital / analog signal is combined, the digital information of the main signal digital / analog signal is changed information that changes depending on the position of the preceding train, the opening of the route, etc., and the digital information of the sub signal digital / analog signal is changed to the track gradient and curve radius Send train control signals from the ground to the train as fixed information such as information on track structure and temporary speed limit information, etc.
On the train car, the received train control signal is separated into main and sub analog signals and main and sub digital signals, the separated main and sub analog signals are demodulated, and the demodulated main and sub analog signals are decoded to determine the allowable traveling speed. The main and sub digital signals separated together are demodulated, the demodulated main and sub digital signals are decoded to calculate the allowable travel speed, the main and sub analog signals are decoded and the determined allowable travel speed and the main and sub digital signals are decoded. A train control method comprising: comparing a calculated allowable traveling speed to determine an allowable train speed; and checking the determined allowable speed and an actual traveling speed of the train to control the train speed.

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