JPH0441113B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention divides a train running route into a plurality of blocked sections, sends a train control signal from a transmitter on the ground side to the blocked section, and transmits the train control signal to the blocked section. The present invention relates to a train control device that receives information on the train and controls the running of the train.

Prior Art A train control device that controls train running using iron rails for train running generally divides the train running route into a plurality of blocked sections and blocks the train control signal that instructs the running speed of the train. The train control signal is sent from the ground for each section, and the above-mentioned train control signal is discriminated on the top of the train to control the brakes and train running. However, in this type of conventional train control device, the train control signal uses a plurality of command speed signals corresponding to each command speed, so on the train side, a circuit part for decoding the command speed is installed in the signal discrimination circuit. A check circuit must be installed for each instructed speed, and a verification circuit to check the actual speed of the train and a comparison circuit to compare the checked train speed with the instructed speed must also be installed on the train. It had the disadvantage of being complicated, large, and expensive.

In addition, by converting the train speed signal into a signal whose frequency changes in steps in proportion to the train speed based on the output signal of the speed generator on the onboard side and sending it from the onboard side to the ground side, the above There is also a device that creates a command speed signal based on the train speed signal and transmits this to the train. However, since this device also discriminates multiple types of instructed speeds on the top of the train, a decoding circuit for the instructed speed must be provided for each instructed speed in the discrimination circuit on the top of the car, and a verification circuit for the train speed and a , the same point is that a comparison circuit for comparing the train speed and the commanded speed must be provided on the train, which also has the disadvantage that the on-board equipment is complicated, large, and expensive.

Purpose of the Invention The present invention only sends one of two types of signals, a run permission signal that allows the train to run, and a run prohibition signal that prohibits the train from running, from the ground side to the top of the car depending on the train speed. By doing so, it is an object of the present invention to provide a train control device in which the on-board device is simple, compact, and inexpensive, and which can also control a train in a fail-safe manner.

Structure of the Invention In order to achieve the above object, the present invention provides a train control device including an onboard device 100 mounted on a train and a ground device 200 connected to a blocked section obtained by dividing a train running path. The on-board device 100 includes an on-board antenna 5, an on-board transmitter 50, and an on-board circuit 6 including a signal discrimination circuit 15, and the on-board transmitter 50 is a speed generator.
A ground device 200 that outputs a train speed signal whose frequency changes approximately in proportion to the train speed in response to the output of the TG via the on-board antenna 5, and which the signal discrimination circuit 15 inputs via the on-board antenna 5. The ground device 200 has a ground receiving section 60 and a ground transmitting section 70, and includes a ground receiving section 60 and a ground transmitting section 70. The transmitter 70 has both a first checking means TGR and a second checking means BR, the first checking means TGR operates when the train speed is less than the commanded speed, and the second checking means TGR operates when the train speed is less than the commanded speed.
The BR operates when the train speed is less than the commanded speed, and the ground receiving section 60 inputs the train speed signal and operates the first checking means TGR and the second checking means BR. The transmitter 70 is configured to output a travel permission signal to the blocked section when both the first and second checking means are operating, and a travel prohibition signal to the blocked section at other times as a train control signal. do.

Embodiments Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing one embodiment of the train control device of the present invention. An on-board antenna 5 and an on-board circuit 6 (on-board transmitter 5
The on-vehicle device 100, which is comprised of a signal discriminator circuit 15 and a signal discriminator circuit 15, is shown in more detail in FIG. In FIG. 1, reference numerals 1 and 1 are relays on which a train 2 runs, and are divided into a plurality of electrically separated closed sections of a predetermined distance T. As shown, impedance bonds 3 and 4 are provided at adjacent boundaries of each closed section.

The train 2 has an onboard device 100. That is, a pair of antennas 5, 5 are installed on the head for receiving train control signals sent to the rails 1, 1 from the ground equipment, and transmitting train speed signals to the rails 1, 1 from the top of the car. The train is also equipped with an on-board circuit 6 that sends the train speed signal to the antennas 5, 5 and determines whether the train speed signal received by the antennas 5, 5 is a travel permission signal or a travel prohibition signal. ing. The above-mentioned on-vehicle circuit 6 is composed of an on-vehicle transmitter 50 and a signal discrimination circuit 15, as shown in FIG.

The on-board transmitter 50 inputs the speed signal output from the speed generator TG provided on the train 2 to the disconnection detection circuit 10, detects whether or not the speed generator TG is disconnected, and detects the disconnection. If this is not the case, a speed information signal with an appropriate amplitude whose frequency changes in accordance with the speed signal is input to the waveform processing circuit 11. Generally, the output of the disconnection detection circuit 10 has a nearly constant frequency up to a predetermined speed (generally 0 to 5 km/h) including when stopped, and at higher speeds, as shown in Fig. 3, for fail-safe purposes. At times, the frequency changes linearly in proportion to the train speed, and if the wire breaks, there will be no output. In other words, the output signal of the speed wire breakage detection circuit 10 is not outputted only when a wire breakage occurs, and is a substantially constant voltage when the train is stopped or below a predetermined speed, and when the speed exceeds a predetermined speed. For the first time, the frequency increases linearly in proportion to train speed. Of course, the frequency of the output signal of the waveform processing circuit 11 changes almost linearly in proportion to the train speed under normal conditions, and there is no output when the speed generator TG fails. Note that the speed generator TG is a known one for trains.

The waveform processing circuit 11 generates a rectangular wave train speed signal whose frequency changes linearly in proportion to the train speed in response to the output signal of the speed generator TG, and inputs it to the modulator 13. In the modulator 13, the carrier wave of frequency F1 generated by the carrier wave generator 12 is amplitude-modulated by the train speed signal, and then supplied to the antennas 5, 5 via a band filter 14 whose center frequency is the frequency F1 of the carrier wave. , and transmit it to the ground.

This same antenna is also connected to a signal discrimination circuit 15, which is another part of the onboard device, and in response to the above-mentioned signal transmitted from the antenna, the signal is returned from the ground side and received by the antennas 5, 5. The signal determining circuit 15 determines whether the control signal is a travel permission signal or a travel prohibition signal.

The signal discrimination circuit 15 distinguishes the train control signals received via the antennas 5, 5 from the frequency F of the carrier wave thereof.
After passing the train control signal through a first band filter 16 whose pass band is 2, the train control signal is demodulated by a demodulator 17, and then the frequency of the running permission signal that follows in parallel is determined.
a second band filter 18 whose passband is Fg;
A third signal whose passband is the frequency Fs of the no-travel signal.
The band filter 19 determines whether the received train control signal is a run permission signal or a run prohibition signal and outputs it. This output is used to control the brake system (described later).

Ground device 20 corresponding to the on-board device described above
0 has a ground receiving section 60 and a ground transmitting section 70. The ground receiving unit 60 filters the train speed signal input to the secondary coil of the impedance bond 3 on the train advancing side through a band filter whose pass band is the frequency F1 of the carrier wave for the train speed signal, as illustrated in FIG. 20, it is demodulated in a demodulator 21, and the demodulated train speed signal is sent to a level detection circuit 22.
After passing through the train speed signal, it is rectified in the rectifier circuit 23, and the rectified output is used to operate the first verification relay TGR to verify whether or not a train speed signal is input. A low frequency variable filter 25 whose band is controlled by a waveform shaping circuit 24 and a setting circuit 27.
After passing through the train in this order, it is rectified in a rectifier circuit 26, and the rectified output is used to operate a second check relay BR to check whether the train speed is below a predetermined command speed. The pass band of the low-pass variable filter 25 is set by a setting circuit 27. This setting circuit 27 generates a frequency corresponding to each indicated speed based on the indicated speed generated by a known indicated speed signal generator (not shown) according to conditions such as the track circuit and the direction of the converter. f1～
Set the maximum passing frequency to one of fn.
It should be noted that the frequencies f1 to fn are selected so that the higher the instructed speed is, the higher the frequencies f1 to fn are.

As shown in FIG. 1, the ground transmitter 70, which functions as a train control signal generation circuit and a transmission circuit in the same ground equipment, has a generator 30 for a travel permission signal with a frequency Fg and a generator 30 for a travel prohibition signal with a frequency Fs. a generator 31 and a generator 32 of a carrier wave of frequency F2;
and two modulators 33 and 34 that amplitude modulate the carrier wave with the travel permission signal and the travel prohibition signal,
Contact point TGR′ of the first reference relay TGR mentioned above and the second
It is comprised of an amplifier 35 which follows through the contact BR' of the inspection relay BR, and a bandpass filter 36 which subsequently supplies an output to the secondary coil of the impedance bond 3 on the train advancing side. the modulator 3
The output signal of 3 is the first and second reference relay TGR,
The output signal of the modulator 34 is input to the amplifier 35 through the operating contacts of the BR in series, while the output signal of the modulator 34 is input to the operating contacts of the first reference relay TGR and the second reference relay via the falling contact of the first reference relay TGR. The signal is input to the amplifier 35 via the falling contact of the BR in series. The passband of the bandpass filter 36 is the frequency F2. It should be noted that each contact of the relay is indicated by the same reference numeral as the corresponding reroux with (') added thereto.

Incidentally, in the train control device shown in FIG. 1, the rails 1, 1 are used as a track circuit of a train detection device of an axle short-circuit type. For this reason, a bandpass filter 37 whose passband is the frequency F2 of the carrier wave for train control signals, a signal processing circuit 38 for processing the output signal, and a track relay TR are provided on the ground side. impedance bond 4 of 2
The train control signal induced in the next coil is input to the band filter 37. The signal processing circuit 38 is a known circuit that rectifies and smoothes the output signal of the band filter 37 to operate the track relay TR. It works if it doesn't exist, and falls if it exists.

Next, the operation of the above train control device will be explained.

In this train control device, the train is
If there is no train speed signal from the train 2, both the first and second check relays TGR and BR have fallen, and the output signal of the modulator 34 (travel prohibition signal) is not received. ) is being transmitted to the closed section T.

In this state, when train 2 enters the blocked section T, the train speed signal from train 2 is received and the first
Check relay TGR operates, and if the train speed indicated by the train speed signal is less than the commanded speed, the second check relay BR also operates, but if it exceeds the command speed, the second check relay BR falls. It remains as it is. Therefore, if the speed of train 2 is below the commanded speed, the first and second check relays TGR, BR
Since both operate together, the output signal (driving permission signal) of the modulator 33 is transmitted to the closed section T, and the on-board device outputs the driving permission signal from the second band filter 18. However, if the speed of the train 2 exceeds the commanded speed, the first check relay TGR operates, but the second check relay BR remains down, so the output signal of the modulator 34 (run prohibition signal ) is transmitted to the blocked section T, and the on-board device outputs a travel prohibition signal from the third band filter 19. That is, depending on the train speed, the on-board device selectively obtains either a travel permission signal or a travel prohibition signal. Furthermore, if the train speed signal is not input to the ground equipment due to a failure of the onboard equipment or track circuit, fail-safe operation is performed. That is, since the first reference relay TGR falls, the output signal of the modulator 34 is transmitted to the closed section T, and the on-board device outputs a travel prohibition signal from the third band filter 19.

Second band filter 18 or third band filter 1
The output signal obtained from 9 is used as a signal to control the brakes of train 2. The brake device of the train 2 releases the brakes only when a signal is output from the second band filter 18, and normally applies the brakes when the signal is output from the third band filter 19. Note that both band filters 18 and 19
If no signal is output from any of the above, sudden braking will be applied.

Immediately after train 2 enters the blocked section T, the on-board device always receives the travel prohibition signal and
The brake is applied immediately by outputting a signal from the band filter 19, but this inconvenience can be solved by, for example, providing the first band filter 16 with a delay function to maintain the state in the immediately preceding blockage section.
The braking relay of the brake device may be a time relay.

Note that the driver on the train 2 normally only needs to operate the train 2 while checking the indication of the signal 7 on the ground side.

In the embodiment described above, a relay is used as a checking means.
Although TGR and BR are used, switching elements such as transistors can be used instead.

Effects of the Invention As described above, the present invention continuously sends a train speed signal whose frequency changes almost linearly in proportion to the train speed from the top of the car to the ground side based on the output signal of a speed generator. On the other hand, if the AND condition of receiving the train speed signal and the train speed implied by the train speed signal being less than or equal to the commanded speed is met, a run permission signal is sent, and in other cases, the train is allowed to run. Since the prohibition signal is sent to the top of the train, there is no need to provide a decoding circuit for each commanded speed on the onboard device, a check circuit for the train speed, and a comparison circuit for the train speed and the commanded speed. This eliminates the need for on-board equipment, making the on-board equipment simpler, smaller, and cheaper.

In addition, the frequency of the output signal of the train speed generator and the disconnection detection circuit that detects the disconnection of the train is generally higher than a predetermined frequency unless there is a failure such as disconnection. Coupled with the fact that the run permission signal is not transmitted to the train if the speed signal is not received, the train can be controlled in a fail-safe manner.

[Brief explanation of drawings]

FIG. 1 mainly shows an electric circuit block diagram of ground equipment showing one embodiment of the train control device of the present invention.
FIG. 2 is an electric circuit block diagram showing an embodiment of the on-vehicle device according to the present invention, and FIG. 3 is an explanatory diagram of an output signal of a disconnection detection circuit. 1...Rail, 2...Train, 3, 4...Impedance bond, 5...Onboard antenna, 6...Onboard circuit, 1
0... Disconnection detection circuit, 11... Waveform processing circuit, 12...
Carrier wave generator, 13...Modulator, 14...Band filter, 15...Signal discrimination circuit, 16...First band filter, 17...Demodulator, 18...Second band filter, 1
9...Third band filter, 20...Band filter, 2
DESCRIPTION OF SYMBOLS 1... Demodulator, 22... Level detection circuit, 23... Rectifier circuit, 24... Waveform shaping circuit, 25... Low range variable filter, 26... Rectifier circuit, 27... Setting circuit, 30...
Run permission signal generator, 31... Run prohibition signal generator, 32... Carrier wave generator, 33... Modulator, 34...
Modulator, 36... Bandwidth filter, 50... On-vehicle transmitter, 60... Ground receiver, 70... Ground transmitter, 10
0...onboard equipment, 200...ground equipment, TGR...first
Checking means (relay), BR...second checking means (relay), TG...speed generator.

Claims (1)

[Claims] 1. An onboard device 100 mounted on a train, and a ground device 2 connected to a blocked section that divides a train running path.
00, the on-board device 100 has an on-board antenna 5, an on-board transmitter 50, and an on-board circuit 6 consisting of a signal discrimination circuit 15, The part 50 is a speed generator
A ground device 200 that outputs a train speed signal whose frequency changes approximately in proportion to the train speed in response to the output of the TG via the on-board antenna 5, and which the signal discrimination circuit 15 inputs via the on-board antenna 5. The ground device 200 has a ground receiving section 60 and a ground transmitting section 70, and includes a ground receiving section 60 and a ground transmitting section 70. The transmitter 70 has both a first checking means TGR and a second checking means BR, the first checking means TGR operates when the train speed is less than the commanded speed, and the second checking means TGR operates when the train speed is less than the commanded speed.
The BR operates when the train speed is less than the commanded speed, and the ground receiving section 60 inputs the train speed signal and operates the first checking means TGR and the second checking means BR. The transmitter 70 outputs a travel permission signal to the blocked section when both the first and second checking means are operating, and outputs a travel prohibition signal to the blocked section as a train control signal at other times. 2. The on-board transmitter 50 includes a disconnection detection circuit 10, a waveform processing circuit 11, a modulator 13 that inputs the output of the carrier wave generator 12, and a band filter 14, which are connected in sequence. The detection circuit 10 outputs a speed signal whose frequency changes approximately in proportion to the speed in response to the output of the speed generator TG, and detects a disconnection of the speed generator TG of the train, and the modulator 13 outputs a speed signal whose frequency changes approximately in proportion to the speed. 12, the output of the waveform processing circuit 11 at the previous stage is modulated and output to the on-board antenna 5. The signal discrimination circuit 15 includes a first band filter 16 connected to the on-board antenna 5 in sequence; Demodulator 17
and a second band filter 18 and a third band filter 19 that follow this demodulator 17 in parallel, and the first band filter 16 is connected to the on-board antenna 5.
The train control signal from the ground equipment 200 is input to the demodulator 17 and is selectively passed through.
is for demodulating it, and the second band filter 18 is for outputting when the train speed signal meant by the train control signal is a travel permission signal,
The third band filter 19 is for outputting when the train speed signal is a travel prohibition signal, and the ground receiving section 60 of the ground equipment 200 is connected to the secondary coil of the impedance bond 3 at one end of the blocked section. A bandpass filter 20, a demodulator 21 following the demodulator 21, a level detection circuit 22 following the demodulator 21 in this order, a rectifier circuit 23, a first reference relay TGR which is a first reference means, and a demodulator 21 which also follows the demodulator 21 in this order. Subsequent waveform shaping circuit 24 and setting circuit 27
A low frequency variable filter 25 connected to
The ground transmitter 70 of the ground equipment 200 includes a run permission signal generator 30 that generates signals of different frequencies.
, a travel prohibition signal generator 31, both generators 30,
Modulators 33 and 34 that follow 31 and are connected to the output of a carrier wave generator 32 that generates a carrier wave;
A bandpass filter 36 is selectively connected to the outputs of the modulators 33 and 34, and a run permission signal generator 30 generates a run permission signal.
A travel prohibition signal generator 31 generates a travel prohibition signal, and modulators 33 and 34 convert the outputs of the travel permission signal generator 30 and the travel prohibition signal generator 31 into carrier waves output from the carrier wave generator 32, respectively. The first reference relay TGR
When the and second check relay BR are both operating, they are connected to the travel permission signal generator 30 to input a travel permission signal, and in other cases, they are connected to the travel prohibition signal generator 31 to prohibit travel. input the signal,
The train control device according to claim 1, wherein the train control device outputs a train control signal to the secondary coil of the impedance bond 3 in the closed section.