Turnout execution unit of computer interlocking system and working method thereof

Abstract

The invention discloses a turnout execution unit of a computer interlocking system and a working method thereof. The turnout execution unit comprises a first action controller, a second action controller and a directional-operation and reverse-operation control circuit controlled by the first action controller and the second action controller, and the turnout execution unit also comprises a safety relay and a select switch; the first action controller and the second action controller are used for controlling a group of switching tubes on the directional-operation and reverse-operation control circuit; the AC input directional-operation and the reverse-operation control circuit is controlled by a normally-opened switch of the safety relay; the select switch is in communicating connection with the first action controller, the second action controller and a signal acquisition unit; and the first action controller, the second action controller and the output of the select switch process and control the safety relay through And logic relationship. By changing a relay in the traditional system into the switching tube, the invention ensures the high reliability of the turnout execution unit through the safety relay and the select switch and greatly reduces the cost of the whole system on the premise of ensuring the high reliability.

Description

Technical field [0001] The invention relates to a station interlocking control system, in particular to a turnout execution unit for controlling a switch machine to drive a turnout to perform fixed and reverse operations and a working method thereof. Background technique [0002] The switch execution units of the current station interlocking equipment are all designed for the four-wire AC and DC electric point machines, that is, the electric point machines have lines X1, X2, X3 and X4, of which lines X1 and X4 It is used to realize fixed operation control, X2 and X4 lines are used to realize reverse operation control, X1 and X3 lines are used for positioning display, and X2 and X3 lines are used for reverse position display. When the fixed operation action is in place, the switch machine will automatically switch to the positioning display state, and the internal switch machine will automatically cut off the reverse position display circuit when positioning the display. At the sa...

AI Technical Summary

Problems solved by technology

[0004] The patent number is ZL 200920209810.2, and the publication date is June 23, 2010. The Chinese utility model patent discloses an interlocking turnout actuator circuit. The actuator circuit realizes fixed operation and anti-manipulation control, the circuit structure and Figures 1a to 1d The illustrated circuit structure is similar, only the first to fourth electronic switches are also relay switches to achieve interlock control on both software and hardware, if the first to fourth electronic switches are other types of switches, two controllers are required MCU1 and MCU2 perform software fault judgment. If the execution unit only judges faults through software and executes fault-to-safety guidance according to the judgment structure, the defect on the one hand is that the probability of fault-oriented safety failure increases, because MCU1 and / or when MCU2 breaks down, it is impossible to perform fault-oriented safety; on the other hand, the delay time for fault judgment through software is longer than that of hardware processing, and safety guidance cannot be performed in time, and the station interlocking system is for fault-oriented safety. The requirements are extremely high, otherwise it will be difficult to guarantee personal safety and property safety

[0005] Although a higher safety factor can be obtained through relays, on the one hand, the extensive use of relays will lead to complex structure and larger system volume, and on the other hand, it will greatly increase the design cost, because the station computer interlocking system The unit price of the relays used in the system is thousands of yuan. Therefore, how to ensure the high reliability of fault-oriented safety on the basis of using as few relays as possible has become an important task in the development of computer interlocking systems.

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