A safety relay-based vehicle system output control circuit and method thereof
A technology of safety relay and vehicle-mounted system, applied in the field of output control circuit of vehicle-mounted system based on safety relay, can solve the problems of poor safety and high failure rate, and achieve the effect of improving safety
Active Publication Date: 2022-06-24
CASCO SIGNAL
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Problems solved by technology
This circuit and method are designed to solve the problem of poor safety and high failure rate of the circuit output control of the traditional vehicle system. The positive and negative poles of the output relay are jointly controlled by the isolation relay and the CPLD, and the state of the relay is retrieved in real time through the normally closed contact. Improving the safety of circuit output regulation
Method used
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[0059] The present invention will be further described below with reference to the accompanying drawings through specific embodiments. These embodiments are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.
[0060] The invention provides an output control circuit of a vehicle-mounted system based on a safety relay, such as figure 1 As shown in the figure, the on-board system output control circuit is connected with the interface of the on-board system K of the external vehicle, and the output of the on-board system K of the external vehicle is regulated in real time; the on-board system output control circuit includes a safety controller 1, a coil power supply control circuit 2. Complex Programmable Logic Device (CPLD) 3 , coil drive circuit 4 and vehicle interface output circuit 5 .
[0061] Among them, the safety controller 1 generates a control signal; the input end of the coil power control circuit ...
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The invention discloses a vehicle-mounted system output control circuit based on a safety relay, comprising: a coil power supply control circuit, the input end of which is connected to the first output end of the safety controller; a CPLD, the input end of which is connected to the second output end of the safety controller ; The coil drive circuit, the input end is connected to the output end of the CPLD; the vehicle interface output circuit, the positive input end is connected to the output end of the coil power control circuit, the negative input end is connected to the output end of the coil drive circuit, and the first output end is connected to the external The vehicle's on-board system interface connection. This invention solves the problem of poor safety and high failure rate of the circuit output control of the traditional vehicle-mounted system. The positive and negative poles of the output relay are jointly controlled by the isolation relay and the CPLD, and the state of the relay is recovered in real time through the normally closed contact, which further improves the circuit. Security of output regulation.
Description
technical field [0001] The invention relates to the technical field of rail transit, in particular to a safety relay-based vehicle-mounted system output control circuit and a method thereof. Background technique [0002] The emergency brake board is an important part of the safety input and output module (VIOM) subsystem. It belongs to the execution link in the VIOM subsystem. It is placed in the vehicle cabinet and is responsible for controlling the on-off of the DC power supply connected to the vehicle, that is, it is responsible for driving the load. output and emergency braking. [0003] The power supply of the emergency brake board is provided by the on-board cabinet through the connector, and the on and off of the safety output relay is controlled by the isolation relay and the Complex Programmable Logic Device (CPLD), so as to realize the emergency of the train. brake. [0004] However, there are still problems of poor safety and high failure rate in the circuit out...
Claims
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IPC IPC(8): G05B19/042B61C17/00B61H13/00
CPCG05B19/0423B61C17/00B61H13/00G05B2219/24215
Inventor 丁娜潘雷刘辉王庆勇冯虎
Owner CASCO SIGNAL