Control method for intelligent fault diagnosis system of pneumatic regulating valve
A technology of fault diagnosis system and pneumatic regulating valve, which is applied in the direction of valve device, engine components, mechanical equipment, etc., and can solve the problems of difficult diagnosis of minor faults, missed diagnosis, and high requirements for expert knowledge reserve.
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[0065] The present invention will be further described below in conjunction with accompanying drawing.
[0066] Such as figure 1 As shown, a control method of an intelligent fault diagnosis system for a pneumatic regulating valve includes the following steps:
[0067] A. Establish offline fault diagnosis model:
[0068] A.1. Data collection:
[0069] Install a displacement sensor and a pressure sensor at the reserved place next to the screw cap of the pneumatic control valve and the air supply hole outside the membrane, and set a 4-20mA current input signal according to a 25% step, collect pressure and displacement data through the data acquisition device, and The collected data is transmitted to the host computer through the main controller through serial port communication;
[0070] In this embodiment, the faults of the pneumatic control valve are divided into air leakage faults, foreign matter faults on the valve seat, valve core wear faults, friction increase faults, sp...
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