JPS59123407A - Automatic train control system - Google Patents

Abstract

PURPOSE:To perform the drive of a train in high efficiency by eliminating the variation in the slipping distance on the basis of the actual speed of the train. CONSTITUTION:The output of a tachometer generator 1 is shaped in waveform to a pulse wave by a waveform shaper 2, and corrected in the error of the speed based on the diameter of the wheel of a train by a speed calculator 3. An antenna 4 receives a limit speed signal corresponding to a section flowed on the ground. A slipping distance detector 6 decides the slipping distance in response to the limit speed, and outputs a signal when the integrated value of the speed output of the calculator 3 reaches the slipping distance. A distance-speed pattern generator 7 generates a distance-speed pattern by the limit speed signal and the signal from the detector 6. A comparator 8 compares the distance-speed pattern by the actual speed of the train and drives an output relay 10 for operating a brake unit.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic train control system that maintains safety in running trains by strictly observing speed limits based on collisions between trains and the topography of the route.

FIG. 1 is a principle diagram showing the operation of a conventional automatic train control system. As shown in the figure, the preceding train is in section N.
+8 (SECN+1), the speed limit for the following vehicle is set according to the section by the ground signal, and the speed limit is vN and ■N respectively.
+119. limited to. Therefore, when a train exceeds the speed limit, the automatic train control device installed on the train automatically detects the speed limit and applies brakes to the train to keep it below the speed limit. This trajectory is indicated by Vv in the figure.

In this case, as shown in Figure 2, when the train speed is high (V in the diagram), the distance traveled before deceleration is long, but when the train speed is low (V2 in the diagram), the travel distance is small. When multiple trains run on the same route in succession, running efficiency decreases.

Furthermore, the running efficiency is also reduced due to variations in the generation of on-vehicle patterns due to a delay in detection of the speed limit by the automatic control device, a delay in commands, a delay in the action of the brake system, and variations in the applied braking force.

The present invention has been made in view of these points, and it maintains the distance-speed trajectory of the train constant, and prevents run curve fluctuations based on variations in train performance and on-board patterns based on detection delays of ground signals. The objective is to provide a control method that can realize efficient train running by eliminating fluctuations in

An embodiment of the present invention will be described below.

That is, in the present invention, as shown in Fig. 8, the highest speed limit pattern Vp allowed by that section is generated, and trains traveling at less than this speed are determined to exceed the speed limit without applying the brakes. Apply the brakes only when This system allows the train to run efficiently even when the speed of the train is low without applying the brakes unnecessarily. This is indicated by VV in the figure.

However, the Vp pattern is generated based on the permissible speed of the next section based on the permissible speed of the previous section, but this change in limit is caused by the speed limit detection delay of the automatic control device on the vehicle.
The idle running pattern length etc. differ based on e and the actual speed Vv of the train.

I! e = Vv Since it is an element that changes, it is an arbitrary variable element. Therefore le
is not always constant. However, the idle running pattern length allowed by the section is a constant value I! Since n can be used, a constant Vp pattern can always be generated by integrating the actual speed Vv of the train and lowering the deceleration pattern when the train travel distance reaches Iln.

Therefore, the configuration shown in FIG. 4 eliminates fluctuations in the idle running distance based on the actual speed Vv of the train, making it possible to efficiently control the speed of the train. In Figure 4, (1) is a speed generator that detects the speed of the train, and (2) is a waveform shaping circuit that shapes the waveform of the output wave of the speed generator (1) to make it convenient for later calculations. It outputs a pulse wave proportional to the output generated by the generator (1). (3) is a speed calculation circuit that receives the output of the waveform shaping circuit (2) and also has the function of correcting speed errors based on the light diameter of the train, and (4) is the speed limit corresponding to the section running on the ground. An antenna for detecting the signal on the vehicle, (5) a demodulator for receiving the output of the antenna (4) and demodulating the limit signal, (6) determining the free running distance according to the speed limit, An idle running distance detector has a function of integrating the speed output of the speed calculation circuit (3) and detecting when a certain idle running distance has been reached, and (7) is a speed limit signal given from the demodulator (5). and a pattern generation circuit that generates a distance-velocity pattern Vp based on the idle distance signal given from the idle distance detector (6), (8) is a distance-speed pattern generation circuit (7)
The limit speed Vp of the train and the actual speed V of the train in the speed calculation circuit (3)
The comparator circuit (9) for comparing the comparator (8) with the comparator (8) is an amplifier that amplifies the output of the comparator (8) and drives an output relay OO for operating a brake system (not shown).

With this circuit configuration, the pattern generation circuit (7) can generate a speed limit pattern Vp according to the section and a constant deceleration pattern even when the actual speed of the train changes. ) can cause the train speed to follow the pattern by applying an input to the relay QO to apply the brake when the train speed Vv exceeds the speed limit pattern Vp, and when the train speed does not exceed the limit speed pattern Vp, the brake is released. .

As described above, according to the present invention, efficient reversal can be performed by making the actual speed of the train follow a pattern that is not affected by speed fluctuations.

[Brief explanation of drawings]

Figure 1 is a principle diagram showing the operation of a conventional automatic train control device.
FIG. 2 is a characteristic diagram showing the fluctuation of the train trajectory based on the principle of FIG. 1, FIG. 8 is a characteristic diagram showing the operation of the present invention, and FIG. 4 is a block diagram showing one embodiment of the present invention. Note that the same reference numerals in the figures indicate the same or corresponding parts. In the figure, (1) is a speed generator, (3) is a speed calculation circuit, (
4) is an antenna, (5) is a demodulator, (6) is a running distance detector, (7) is a distance-velocity pattern generation circuit, (8) is a comparator, (9 is an amplifier, and αQ is an amplifier. It is an output relay. Agent Makoto Kuzuno

Claims (1)

[Claims] Automatic train control equipment that controls train operation to prevent trains from colliding with each other and to prevent speed limits based on terrain and route conditions from being exceeded.The on-board equipment is equipped with a distance-speed pattern generator to control speed limits from the ground. Speed (detects on the train that the G has changed from higher to lower), compares the actual speed with the speed limit, and maintains the actual speed below the speed limit, so that the distance traveled by the train is permissible in that section. An automatic train control system characterized in that a distance-speed pattern is generated in which the deceleration pattern is reduced when the idle running pattern length is reached, and the brake is applied only when the permissible speed limit in that section is exceeded.