JPH03128760A - Digital code demodulation type automatic train control device - Google Patents

Abstract

PURPOSE:To provide a driver in a car with detailed speed information by a method wherein an ATC digital code signal wave by means of which at least a track circuit name, ATC aspect information, and a preceding trail position are digitally coded is transmitted and received as an ATC signal waves, and an ATC aspect is outputted. CONSTITUTION:In a CPU 8, a receipt ATC digital code signal wave for at least a track circuit name 12, ATC aspect information 13, and a preceding train position 14 from a track circuit 4T is demodulated by a demodulator 4 and inputted through an I/F 7. By using a table of a prestored ATC aspect to a preceding train position, from received preceding train position information, for example, one bit is added thereto to produce a preceding train position transmitted to a subsequent train. Further, a rear track circuit name is added to produce an ATC digital code being transmitted to a track circuit 5T. Meanwhile, in a car, a CPU 22 reads ATC aspect information from a demodulator 20 to output it through an I/F 21.

Description

[Detailed Description of the Invention] This invention converts a large amount of information such as train speed information, track circuit name, and the position of the train ahead into digital codes, and transmits ATC digital signal waves modulated with the code to the train. This invention relates to a digital code modulation type automatic train control device that controls trains by transmitting signals to trains.

Automatic train control equipment (hereinafter referred to as ATC) on conventional lines
It is called a device. ), as shown in Fig. 4 and Fig. 5, respectively, the blocks of the ground equipment and the onboard equipment are shown.
The ATC signal wave 51 is a signal wave obtained by AM modulating a carrier wave with a code frequency of 10 to 89H2, and depending on how many sections of the track circuit the train TR is in front of, the track relay falls, and then the relay is activated in turn. A large number of relay circuit networks within the rack 52 are activated to select the ATC signal waves to be transmitted to the track circuit in question. For example, if there is a train ahead on the track circuit 3T, the 3THR53 is restored in the relay rack 52, 4TO and R54 are activated, and the 5T45R55 is activated by the operation of 4To and R54, and the ATC to the 5T transmitter 56 is activated. The signal wave is an ATC45 signal wave, and the track circuit 5T
An ATC45 signal wave will be transmitted to.

On the other hand, in the on-board device shown in FIG.
The code frequency is detected by a wave detector 59, and the code frequency is selectively amplified by a selection amplifier 60 to operate a speed control main relay 61. In the above example, for the rear train on the 5T track circuit,
Since ATC45 signal waves are flowing in the 5T orbital circuit,
On the vehicle, the ATC45 signal wave is received and the main relay 45MR for 45 speed control is operated.

However, in the conventional ATC device, the code frequency modulates the ATC carrier wave to generate the ATC signal wave, so
This is a low frequency of +00 Hz or less, and the selection method for the selection amplifier 60 to select this is a C resonant circuit or an active filter using an operational amplifier, but many code frequencies can be selected from the selection characteristics. Currently, only about 14 waves are in practical use.

In addition, the ATC signal display information to the train behind is created by wiring a group of relays that detect the position of the train ahead within the relay rack 52, which requires a circuit network with many relays. There was a problem.

Therefore, the present invention solves the problems of the conventional device, can provide a large amount of speed information as an ATC signal wave, and can provide a large amount of speed information necessary for creating ATC signal display information to the rear train. Eliminates the need for a circuit network using relay groups,
An object of the present invention is to provide an ATC device that can be simplified.

In order to achieve the above-mentioned object, the present invention provides a transmitter/receiver unit that transmits and receives ATC signal waves between adjacent track circuits in ground equipment, and receives the ATC signal waves transmitted from the transmitter/receiver unit with a power receiver. An automatic train control device in which a receiving unit for outputting an ATC indication is provided on an on-board device, and at least a track circuit name, ATC indication information, and a preceding train position are digitally coded as the ATC signal wave. ATC digital code signal waves are used.

The transmitting/receiving unit includes a demodulator that demodulates the received ATC digital code signal wave from the forward track circuit into a digital code, and the received ATC digital code demodulated by this demodulator is inputted via an interface, and the internal The ATC digital code is created by reading the ATC status information to be sent to the rear track circuit, the forward train position information, and the digital code representing the track circuit name based on the forward train position versus ATC status table stored in the ATC status table. A CPU and an oscillation modulator are provided for inputting the ATC digital code created by the CPU through the interface, modulating it into a transmission ATC digital code signal wave, and transmitting the signal wave to the rear track circuit.

Further, the receiving unit includes a demodulator that demodulates the transmission ATC digital code signal wave transmitted from the oscillation modulator and received by the power receiver into a digital code, and a demodulator that demodulates the reception ATC digital code signal wave demodulated by the demodulator. C input through the interface and read to display ATC
A PU is provided.

- Once the above configuration is used, an ATC digital code signal wave in which at least the track circuit name, ATC present information, and forward train position are digitally coded is demodulated from one track circuit by a demodulator, and then sent to the CPU via an interface. The forward train position vs. ATC is input to and stored internally by this CPU.
The digital code to be transmitted to the rear track circuit is read out using the current table, and an ATC digital code is created. The created transmission ATC digital code is input to the oscillation modulator via the interface, and from there A
It is transmitted to the rear track circuit as a TC digital code signal wave.

On the other hand, on the train, the power receiver transmits AT to this track circuit.
A C digital code signal wave is received, demodulated by a demodulator, and input to the CPU via an interface.
Read to indicate ATC in PU.

IT team Figures 1 to 3 show an embodiment of this invention, and
In FIG. 1 showing the TC transmission and reception block, 1 is reception from the orbital circuit 4T.

A transmitting/receiving unit (4TR) that transmits to the orbital circuit 5T.
15TS unit), 2 is a transmitting/receiving unit (3TR1) that receives from the track circuit 3T and transmits to the track circuit 4T.
4TS units), and each of these units has the same configuration.

The transmitting/receiving unit 1 includes a bandpass filter 3 and a demodulator 4 connected to a track circuit 4T, an amplifier 5 and an oscillation modulator 6 connected to a track circuit 5T, and a demodulator 4 and an oscillation modulator 6.
and a CPU 8 connected via an ink face 7.

The frame 10 of the ATC digital code transmitted and received with the track circuit via the transmitting/receiving units 1, 2, . . . has a configuration as shown in FIG. Information +3. It consists of a forward train position 14 and a CRC]5. The arrangement of each bit is, for example, flag sequence 11...8 bits, track circuit name 12...8 bits, ATC display information I3...9 bits, forward train position 14...6 bits, CRC15...
It is 8 bits.

Track circuit names 12 are displayed in consecutive numbers up to 255 track circuits for each line, and ATC current information! 3 is as in code example 13a < ,
C2=36 information! ! The forward train position 14 displays <, C2=15 information as shown in code example 14a, and the CRCI
5 is an 8-bit cyclic redundant code for sign verification.

The demodulator 4 performs MSK detection on the received ATC digital code signal wave from the orbital circuit 4T and demodulates it into a digital code, and the oscillation modulator 6 performs MSK modulation on the transmitted digital code and converts it into an ATC digital code signal wave. do.

Further, the CPU 8 inputs the received ATC digital code demodulated by the demodulator 4 via the interface 7, and uses the received front train position information based on the front train position versus ATC display table stored in advance in the internal ROM. Read the sending ATC current information and add, for example, 1 bit to it from the received forward train position to create the forward train position to be transmitted to the rear, and then add the rear track circuit name to the track circuit 5T. Create an ATC digital code to send. The created ATC (digital code) is then output via the interface 7.
The digital code is input to the oscillation modulator 6, where it is modulated and output as an ATC digital code signal wave to the track circuit 5.
Sent to T.

Fig. 2 shows the ATC transmission block of the onboard device, 17 is a power receiver that receives the ATC digital code signal wave flowing on the rail of the track circuit, and 18 is the receiving unit that receives the ATC digital code signal wave from the power receiver I7. Then, the bandpass filter 19 converts the ATC digital code signal wave into, for example, an MS
A demodulator 20 that demodulates the ATC digital code as shown in FIG. 3 by performing K demodulation, and an interface 21. and C
Consists of PU22.

This CPU 22 reads out the ATC present information from the demodulator 20 and also outputs the ATC information via the interface 21.
Output the manifestation.

In the above, the ATC digital code has the track circuit name!
2. Since the ATC current information 13 and the forward train position 14 are displayed, the CPU 8 first receives the reception A from the track circuit.
If the track circuit name read from the TC digital code is the same as the relevant track circuit name, it is determined that there is no train, and if there is no received ATC digital code or the read track circuit name is different from the relevant track circuit name, it is determined that a train is present. to decide. Therefore, when detecting the presence or absence of a train, safety and reliability against noise and other factors can be increased.

Further, since the forward train position 14 and the ATC display information 13 are digital codes, there is no need to provide a circuit network with a large number of relay groups from the forward train position as in the conventional case. Furthermore, since the ATC present information 13 is a digital code, which has 9 bits in this example, it is a large amount of information, and much more present information can be transmitted as ATC compared to the conventional example.

In this embodiment, the track circuit has been described as an example of a paid edge, but the present invention can be similarly applied to an uninsulated track circuit, a short and small continuous track circuit, and various other train presence/absence determination devices.

This invention has the above-described configuration, and transmits and receives ATC digital code signal waves in which at least track circuit name, ATC display information, and forward train position are digitally coded as ATC signal waves, and displays ATC display information. Since I made it to output
You can get detailed speed information on the car.

It is possible to perform advanced and safe operation control of the following train. Additionally, there is no need for a conventional circuit network consisting of a large number of relay groups.

This has the excellent effect of simplifying the device configuration.

[Brief explanation of the drawing]

Fig. 1 shows an ATC transmission/reception block diagram of the on-board equipment shown in the above, and Fig. 3 shows the frame of the ATC digital code used in the above. The drawings, FIG. 4, show a typical example of a conventional ATC transmission/reception block diagram of a ground device. FIG. 5 is a block diagram of an ATC reception block diagram of an on-board device. 1.2... Transmission/reception unit 3.19... Bandpass filter 4.2" (... Demodulator 5... Increased IPNM 6... Oscillation modulator 7.21...
・Interface 8.22...CPU (processing unit) lO...Frame 11...Flag sequence 12
...Track circuit name 13...ATC display information 14...
・Forward train information 15...CRC17...Reception unit 2 18...Receiving unit 2 Funeral map TR-1110 2nd Figure 57 Figure 5 Relay circuit network

Claims (1)

[Claims] 1. A transmitting/receiving unit that transmits and receives ATC signal waves between adjacent track circuits is provided in the ground equipment, and the ATC signal waves transmitted from the transmitting/receiving unit are received by a power receiver to display the ATC status. An automatic train control device in which an on-board device is provided with a receiving unit that outputs at least a track circuit name, an AT
AT that digitally encodes C-display information and the position of the train ahead
a demodulator that demodulates the received ATC digital code signal wave from the preceding track circuit into a digital code using the C digital code signal wave, and inputs the received ATC digital code demodulated by this demodulator via an interface, An ATC digital code is created by reading the digital code representing the ATC status information, the rear train position, and the track circuit name to be sent to the other track circuit using the internally stored forward train position versus ATC status table. CPU and AT created with this CPU
The transmitting/receiving unit is provided with an oscillation modulator that inputs a C digital code through the interface and transmits it to the rear track circuit as a transmission ATC digital code signal wave, and the oscillation modulator inputs the C digital code through the interface and transmits the signal wave from the oscillation modulator to the power receiver. A demodulator that demodulates the transmitted ATC digital code signal wave received by the demodulator into a digital code, and a CPU that inputs the received ATC digital code demodulated by this demodulator via an interface and reads it out for displaying the ATC. , a digitally modulated automatic train control device, characterized in that it is provided in the receiving unit.