JPS596561B2 - Multi-system automatic train control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-system automatic train control device, and more specifically, it has a main power source and an auxiliary power source. Power is supplied in parallel to the conversion power supply section, and the converted voltages are supplied to the respective digital calculation sections as driving voltages, and the controlled vehicle speed signal and reference vehicle speed signal are input to each of the digital calculation sections and multiplexed. This invention relates to a multi-system automatic train control device that controls train speed and displays faults based on the results of arithmetic processing.

Conventional multi-system automatic train control equipment resets the calculation content of each digital calculation unit before starting calculation when the power is turned on. It is difficult to generate a reset signal in response to a momentary power failure, and this causes a large difference in the time it takes for each digital calculation unit to recover.
There was an inconvenience that the failure detection circuit detected a mismatch in the calculation contents, determined it to be a failure, and displayed the failure.

The purpose of the present invention is to eliminate the above-mentioned disadvantages of the prior art,
By adding a reset signal generation circuit that starts when the power is switched from the main power supply to the auxiliary power supply, a reliable reset signal is generated, the operation of each digital calculation section is unified, and the time for returning to operation is shortened. An object of the present invention is to provide a multi-system automatic train control device configured so that a failure detection circuit does not detect a failure. In order to achieve the above object, the present invention is characterized in that, when switching from the main power source to the auxiliary power source, the point in time when the auxiliary power source is turned on is prompted, and from this point on, each of the above functions is performed only for a certain period of time with variable settings. The configuration is such that a reset signal generation circuit is provided for outputting a reset signal to the digital arithmetic unit.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a time chart of various signals in FIG. 1.

In FIG. 1, 1 is a main power source, which is an AC power source in the embodiment, and 5 is an auxiliary power source, which is a DC power source in the embodiment. 2
is an AC voltage detector, which has a built-in detection section, an A contact 3, and a B contact 4.

T is a speed check section for controlling the automatic train, and is composed of multiple (triple in this embodiment) power supply sections 8 and similarly multiple digital calculation sections 9. Reference numeral 10 denotes a receiver which generates a reference vehicle speed signal moment by moment based on the current running location and running condition of the train.

11 is a speed generator that detects the train speed and outputs a signal proportional to the speed.

The main power supply 1 is connected to the detection part of the AC voltage detector 2 and the A contact 3 of its output relay, and the A contact 3 is connected to the AC input terminal of the power supply part 8 of 3 channels, and the auxiliary power supply 5 is It is connected to the B contact 4 of the output relay of the voltage detector 2, and is connected to the DC input terminal of the power supply section 8 of three channels from the B contact 4.

The power supply unit 8 receives the main power supply 1 or the auxiliary power supply 5 as an input, generates a DC 5 and a DC 24, and supplies the DC current 5 and DC 24 to each digital calculation unit 9 as a driving voltage. The digital calculation unit 9 receives the reference vehicle speed signal from the receiver 10 and the speed generator 1.
1 receives the controlled vehicle speed signal from 1 as an input, compares both speed signals, and its output is connected to an output circuit 12 that performs logical control with majority priority, and a failure detection circuit 13 that detects discrepancies in each channel. There is. The output generated by the output circuit 12 becomes a brake command, and the output generated by the failure detection circuit 13 becomes a failure indication signal. In the embodiment shown in FIG. 1, a reset signal generating circuit 14 is further added to the triple system automatic train control system having the above structure.

The reset signal generating circuit 14 includes a rectifier circuit 15, a capacitor 16, a relay coil 17, its A contact 18, a relay coil 19, and its A contact 20. The AC voltage that has passed through the A contact 3 of the output relay of the AC voltage detector 2 is converted into a rectifier circuit 15, a capacitor 16, a relay 17, and its A contact 1.
On the other hand, the DC voltage via the B contact 4 of the output relay of the AC voltage detector 2 is connected to the coil of the relay 19 via the output A contact 18 of the timer. , is sent as a reset signal to the digital calculation unit 9 of each channel via the A contact 20 of this relay 19. Next, the operation of the circuit shown in FIG. 1 will be explained using the time chart shown in FIG. When the AC voltage a is cut off due to a failure in the main power supply 1, the AC voltage detector 2 detects this and the output b of the A contact 3 turns off after time t1, and the output c of the B contact 4 turns off after time t1. :Groan:[ZemeH:Medium::Revenge゜tIt will occur in 2 hours.

A DC voltage is applied by this B contact 4, and the output e of the power supply unit 8 returns to the rated voltage again after T3 time. On the other hand, the AC input f to the rectifier 15 of the reset signal generator 14 turns off at the same time as the main power supply 1 is cut off, but since the time element of the timer is set to T4 time, the timer output The A contact 18 turns off with a delay of T4 from the time when the main power supply 1 is turned off. FIG. 2g shows the state of this A contact 18. h is the beam reset signal, which is generated at time T5 when the coil of relay 19 is energized and its A contact 20 is on, and T5=T4-T2. That is, the reset signal h is generated only from the time when the auxiliary power supply is turned on until the time when the output A contact 18 of the timer is turned off. Note that it is necessary to reset the digital calculation unit 9 after the output of the power supply unit 8 has returned to the rated voltage.
The output e of the AC power supply 1 is set to be greater than the time T3 from when the AC power supply 1 fails until the voltage returns to the rated voltage again. The reset signal generating circuit 14 used in this case is a simple circuit consisting of a relay-type timer and a relay operated by its output contact, so its operation is stable and reliable, and it can malfunction due to noise etc. There's nothing to do. Although the embodiment in FIG. 1 has been explained using an automatic train control device with a triple system configuration as an example, it will operate in the same way and produce the same effects with a dual system configuration and a multiplex system beyond the triple system. Of course.

As above. According to the present invention, by resetting the digital calculation section of each channel when switching from the main power source to the auxiliary power source, it is possible to unify the operation, and when the power source is switched, a failure is indicated by the failure detection circuit. The disadvantages of the prior art can be eliminated by a simple circuit, and the time required for each channel to return to normal operation can be shortened.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, and Fig. 2 is a circuit diagram showing an embodiment of the present invention.
This is a time chart of various signals in the figure. 1... Main power supply, 5... Auxiliary power supply, 8... Power supply section,
9... Digital calculation section, 10... Receiver, 11.
...speed generator, 12...output circuit, 13...failure detection circuit, 14...reset signal generation circuit.

Claims (1)

[Claims] 1 It has a main power supply and an auxiliary power supply, and when the main power supply fails, the auxiliary power supply supplies power in parallel to multiple power supply units and converts the voltage, which is then used as the drive voltage for each digital calculation unit. In a multi-system automatic train control system that controls the train speed or displays a fault based on the calculation results obtained by inputting the controlled vehicle speed signal and the reference vehicle speed signal to each of the above-mentioned digital calculation units and performing multiple calculation processing, the main power supply is connected to the auxiliary power supply. A multi-system automatic train control device, characterized in that it is provided with a reset signal generation circuit that outputs a reset signal to each of the digital calculation units for a certain period of time from the time when the auxiliary power source is turned on.