Electromagnetic control element failure diagnosis method and device based on variation of electric current at drive end
An electromagnetic control and diagnostic method technology, applied in the detection field, can solve problems such as the inability to accurately judge the correctness of the action process of electromagnetic control components, and achieve the effects of reducing system costs and improving production efficiency
Active Publication Date: 2011-04-20
张东来
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Problems solved by technology
The method collects the change of current at the driving end of the electromagnetic control element, judges whether the electromagnetic control element is working normally according to the change of the current, solves the technical problem that the correctness of the action process of the electromagnetic control element cannot be accurately judged in the prior art, and realizes the correctness of the electromagnetic control element. Judgment of fatigue degree and failure prediction of electromagnetic control components during long-term use
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[0023] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0024] Depend on image 3 It can be seen from the figure that this electromagnetic control element fault diagnosis device based on the change of the driving terminal current includes a current detection unit, a signal conditioning unit, a threshold comparison unit and an MCU control unit connected in series, and the current detection unit is connected to the driving terminal coil of the electromagnetic control unit Above, the control signal output of the MCU control unit is connected to the electromagnetic control element, and the signal conditioning unit is connected to the MCU control unit; the MCU control unit also includes a timing unit, and the timing unit can be set separately, or can be programmed by software in the MCU control unit and The internal integrated circuit is realized, and the electromagnetic control element includes an electromagneti...
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An electromagnetic control element fault diagnosis device based on drive-end current changes comprises a current detection unit, a signal conditioning unit, a threshold comparison unit and an MCU control unit which are connected in series; the diagnostic prediction comprises the following steps: the MCU control unit in a detection device controls and turns on an electromagnetic control unit; the change curve of the operating current of the electromagnetic control unit is detected through the current detection unit; the data after processing is inputted into the threshold comparison unit and compared; the threshold comparison unit then outputs the corresponding waveform signals; and the MCU control unit determines the working state of the electromagnetic control unit based on the input signals. In the process of failure prediction, all the change detection methods of the invention can be used for extracting the changing properties of the drive-end current waveform characteristic quantity; the invention can make use of the changing properties of the characteristic quantity to realize fault prediction through data fusion, neural network and other methods so as to predict the fault inthe case of no fault to improve the production efficiency, the reliability, the maintainability and the security.
Description
technical field [0001] The invention relates to detection technology, in particular to methods and devices for fault diagnosis and prediction of electromagnetic control components. Background technique [0002] As an automatic and remote control electrical appliance, electromagnetic relay is widely used in automatic control system, telemetry system, power protection system, communication and other systems. Solenoid valve, as a device that converts electrical signals into hydraulic control signals, is widely used Widely used in hydraulic systems, pneumatic systems and other systems in various industries. As key equipment in various application industries, electromagnetic relays and solenoid valves have similar electrical characteristics and mechanical motion characteristics, and their safety and reliability directly affect the safety and reliability of the system where they are installed. The existing fault identification methods for electromagnetic relays and solenoid valve...
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IPC IPC(8): G05B23/02
Inventor 张东来马鑫
Owner 张东来