Vehicle door safety loop line fault point detection system and fault judging method

Abstract

The invention relates to a vehicle door safety loop line fault point detection system. The vehicle door safety loop line fault point detection system includes a vehicle door safety loop line and doorcontrollers assigned to all vehicle doors, wherein the vehicle door safety loop line connects a first group of contacts at both ends of state switches of all vehicle doors in series, and the vehicle door safety loop line is correspondingly provided with a first safety loop line end and a second safety loop line end of each vehicle door at the two ends of each door state switch; the first safety loop line end and the second safety loop line end are connected to the input end of the corresponding door controller; and the door controller collects an electric level state fed back from the first safety loop line end and the second safety loop line end, and the vehicle door safety loop line fault point detection system judges whether the vehicle door safety loop line has a fault or not and the location of a fault point by comparing an collected electric level state fed back from the first safety loop line end and an electric level state fed back from the second safety loop line end. In addition, the invention further provides a fault judging method for the vehicle door safety loop line fault point detection system.

Description

technical field [0001] The invention relates to the technical field of urban rail vehicle circuit design. The present invention further relates to a fault point detection system and a diagnosis method for the door safety loop of an urban rail vehicle. Background technique [0002] In urban rail vehicles, the door system is a very critical, complex subsystem that has more contact with passengers and is directly related to passenger safety. Urban rail vehicles have a large number of doors and frequent operations. Taking an 8-carriage train as an example, there are usually 80 passenger compartment doors, and the doors need to be opened and closed every 2 to 4 minutes on average during operation, and the state of the doors is related to the operation of the train, so its failure rate and failure downgrading treatment Capability directly affects the operation quality and safety of the entire line. In order to monitor the status of the doors, when designing the vehicle circuit,...

AI Technical Summary

Problems solved by technology

[0005] Because the door security loop connects the states of all the doors in series, in addition to the failure of the security loop of the door itself, the door security loop between the vehicle level (in the same compartment) and the train level (between adjacent compartments) doors may also be Faults, such as broken wires, disconnected terminals, or loose connectors, may cause faults in the safety loop between the doors

[0006] However, due to the series structure of the door safety loop, when a fault is reported on the driver's display, it can only prompt the existence of a fault, but cannot determine where the fault occurred, and it is impossible to quickly troubleshoot the fault.

And due to the large number of contacts connected in series in the door safety ring line and the frequent use of the door, the number of door system failures accounts for about 50% of the entire vehicle failure, and it is difficult to quickly determine the location of the failure after the failure, so that the defect of the failure cannot be eliminated as soon as possible. Caused the train to be delayed, off the assembly line, and even clear passengers

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