Electronic apparatus and method for controlling three phase current point switch

Abstract

The invention mainly relates to an automatic control system for transportation railway signals, in particular to an electronic device for controlling a three-phase alternating current point machine and the method thereof. The electronic device comprises a locking protection circuit (3), and is characterized in that the device further comprises a discriminate circuit (2) for the input power supply of a three phase operation power supply; the locking protection circuit (3), an actuating circuit overflowing and detecting circuit (5), and a point machine action driving circuit (6) is sequentially connected to the output end of the discriminate circuit for driving a three-phase alternating current point machine (8); the output end of the three-phase alternating current point machine (8) is connected with an indicating signal acquisition circuit (7); the output ends of a communication circuit (1), the power supply discriminate circuit (2), the actuating circuit overflowing and detecting circuit (5) and the output end of the indicating signal acquisition circuit (7) are connected with the input end of a microcontroller system (4); the locking protection circuit (3) and the point machine action driving circuit (6) are arranged at the output end of the microcontroller system (4); and the indicating power supply input is arranged at the input end of the indicating signal detection circuit (7). The invention adopts non-contact control technique, and a switch converting indicating circuit formed by a safe relay is replaced by an electronic circuit.

Description

Technical field: [0001] The invention mainly relates to an automatic control system for traffic and transportation railway signals. Background technique: [0002] With the demand of "high speed and heavy load" in railway transportation, a large number of three-phase AC switching devices are used. For the control circuit of this device, whether it is electrical centralized interlocking or computer interlocking, it adopts logic control composed of relays. circuit to achieve. This relay circuit has the following problems: [0003] 1. There are hidden dangers in safety. [0004] (1) The relay circuit is composed of separate components and relays. The contact control technology of the relay is used. It is easy for ordinary technicians to change the control logic by sealing the connection points, and there are great hidden dangers in safety. [0005] (2) The indicating circuit composed of relays can only monitor the signal of one position in the same period of time, that is, wh...

AI Technical Summary

Problems solved by technology

This switch position monitoring method has no safety problems under normal circumstances, but during station construction or equipment maintenance, engineers and technicians often add indicating diodes to both the positioning position and the reverse position for the convenience of testing and finding faults. When the fixed operation command is executed, no matter what position the switch machine is in, the switch is considered to be in the positioning position because the external circuit has been formed. Similarly, after the reverse operation command is executed, no matter what position the switch machine is in, it is considered The turnout is in the reverse position, which constitutes a false position representation, causing a very large safety hazard to the actual operation

[0006] 2. Poor maintainability

[0007] 3. Poor scalability

When the system needs to be expanded or modified, the relay circuit needs a lot of wiring, which increases the failure rate on the one hand, and prolongs the construction period on the other hand, affecting the use efficiency

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