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.

Active Publication Date: 2018-11-27
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, this method requires a high level of expert knowledge reserve, and it is difficult to diagnose minor faults, and the missed diagnosis is serious.

Method used

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  • Control method for intelligent fault diagnosis system of pneumatic regulating valve
  • Control method for intelligent fault diagnosis system of pneumatic regulating valve
  • Control method for intelligent fault diagnosis system of pneumatic regulating valve

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Embodiment Construction

[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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Abstract

The invention discloses a control method of an intelligent fault diagnosis system of a pneumatic regulating valve, comprising the steps of establishing an off-line fault diagnosis model and an on-linefault diagnosis; By establishing off-line fault diagnosis model and on-line fault diagnosis steps, not only the fault self-diagnosis of pneumatic regulating valve is realized, but also the accuracy of fault diagnosis is improved, especially the missed diagnosis rate is reduced, and the fault operation of valve is avoided. But also has good generality, and can complete fault diagnosis without complicated expert experience and knowledge reserve; Common operators can grasp, improve the pneumatic valve fault diagnosis automation and intelligence.

Description

technical field [0001] The invention relates to the field of valve fault detection and diagnosis, in particular to a control method for an intelligent fault diagnosis system of a pneumatic regulating valve. Background technique [0002] As the terminal execution equipment of industrial automation control system, pneumatic control valve is widely used in petrochemical, metallurgy, light industry, food and other industries. Its fault detection and diagnosis are related to safety and production. The traditional way of troubleshooting is to check regularly based on experience, which not only wastes a lot of manpower and material resources, but also causes a large number of normal valves to fail due to maintenance and disassembly. [0003] At present, most of the existing online fault detection devices in the market are intelligent locators imported from abroad, and must have a communication protocol and special analysis software, which is high in cost and poor in versatility. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K37/00
CPCF16K37/0025F16K37/0041
Inventor 周林娜陈黎明蒿纪星杨春雨代伟沈乐萍赵建国汪芸王众刘金浩
Owner CHINA UNIV OF MINING & TECH
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