Method for detecting working condition of electromagnetic valve

Abstract

The invention discloses a method for detecting the working condition of an electromagnetic valve. The working condition of the electromagnetic valve can be detected in real time through an electromagnetic valve working condition detecting device. The detecting device comprises a power supply unit, a single chip microcomputer, a detecting unit, a man-machine interface unit and a safety control unit. The method includes the steps that the device is started and powered up, and the single chip microcomputer completes initialization; the electromagnetic valve is connected in, and the single chip microcomputer outputs alternating currents of the fixed frequency through an I / O interface; on-line detection is conducted, the detecting unit inputs state detection signals to an A / D interface of the single chip microcomputer, and then the signals are compared with rating data; and state indication is carried out, and whether the electromagnetic valve is turned off or on is judged according to the comparison result, and indication is further made. By the adoption of the method, whether the electromagnetic valve is on or off can be detected through inductance value change in the on-off state of the electromagnetic valve, and inductance represents different reactances under the alternating current condition; by the adoption of resistive subdivision, whether the electromagnetic valve is turned off or on is judged by analyzing voltage change, and therefore the working condition of the electromagnetic valve can be detected accurately.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for the working state of an electromagnetic valve. Background technique [0002] Solenoid valve is an electronically controlled valve switch, which usually includes an electromagnet wound with a coil. When power is applied to both ends of the coil, the electromagnet generates electromagnetic force to lift the center moving component from the valve seat, and the valve opens; when the power is turned off, The electromagnetic force disappears, and the spring presses the center moving assembly on the valve seat again, and the valve closes. The working state of the solenoid valve mainly refers to the on and off state of the solenoid valve. [0003] In practical applications, real-time online detection of the working status of the solenoid valve is required. This detection cannot affect the normal operation of the solenoid valve. At the same time, this real-time detection must ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a detection method for the working state of the solenoid valve, which solves the problems of inaccurate detection of the working state of the solenoid valve working on-line and lack of safety protection in the prior art.

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