Pressure change model for EMU, air door fault diagnosis method, system and device

Abstract

The present invention relates to a pressure variation model, a damper fault diagnosis method, system and device for an EMU, wherein the EMU air-conditioning damper fault diagnosis method includes: obtaining real-time pressure data in the EMU; constructing a pressure change model in the EMU to Obtain the standard pressure change trend and threshold value in the EMU; compare the real-time pressure change trend in the EMU with the standard pressure change trend and threshold value when the damper is abnormal, so as to judge the damper failure; Intelligent diagnosis of damper action and abnormal feedback, and further speculation of the actual status of the damper, can improve the working efficiency of the air conditioner and reduce energy consumption. For the abnormal feedback of the damper, but the actual status of the damper is normal, early warning will be given in time to remind customer service personnel of preventive inspection and replacement, improve product reliability, judge the actual action status of the damper, avoid false alarm failure of the air conditioner, improve user satisfaction, and reduce air conditioner maintenance costs.

Description

technical field [0001] The invention belongs to the technical field of train damper fault diagnosis, and in particular relates to a pressure change model for an EMU, a damper fault diagnosis method, system and device. Background technique [0002] In the current EMU air conditioner, there are fresh dampers and waste exhaust dampers, both of which are pneumatic dampers. Mainly used for air volume adjustment and pressure wave protection. It can be turned on or off according to the air conditioner working mode, external temperature, pressure wave protection and other requirements. The method for judging the damper fault is: 1. Output the command to open the damper, and the feedback of the damper is closed within a certain period of time; 2. Output the command of closing the damper, and the feedback of the damper is open within a certain period of time; if 1 or 2 are continuous N If it is satisfied for the first time, it will report the damper failure. However, there are many...

AI Technical Summary

Problems solved by technology

However, there are many problems in the traditional damper fault judgment process: when the damper closing command is output, the closing command has been executed, the damper is actually closed, but the feedback of the damper is still open, resulting in a false report of the damper closing fault; when the damper opening command is output, The open command has been executed, the damper is actually opened, but the feedback of the damper is still closed, resulting in a false report of the damper opening fault

However, the air conditioning control system only judges the fault through the feedback of the damper, and cannot distinguish the actual fault of the damper, or the feedback caused by the failure of the magnetic induction switch or the input point does not match the actual state. experience, and increase maintenance costs

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