Non-contact power system polarity testing device based on magnetic flux leakage principle

Abstract

The present invention discloses a non-contact power system polarity test device based on magnetic leakage principle, comprising at least one magnetic field sensor, a signal conditioning module, an A / D conversion module, and a processing module; wherein the processing module receives a signal comprising magnetic field transient change data acquired by the magnetic field sensor and then extracts a characteristic signal in the signal, and obtains motion characteristics of a corresponding attitude control nozzle solenoid according to the characteristic signal, after that, the processing module performs consistency comparison for the obtained motion characteristics of the corresponding attitude control nozzle solenoid and a control action command of a power system attitude control nozzle solenoid given by an onboard control system, if the obtained motion characteristics of the corresponding attitude control nozzle solenoid is consistent with the control action command of the power system attitude control nozzle solenoid given by the onboard control system, it is considered that the system polarity is correct. The non-contact power system polarity test device based on magnetic leakage principle can effectively identify power-on and power-off processes of a corresponding solenoid, achieves high polarity judgment accuracy and cannot destroy a test state.

Description

technical field [0001] The invention relates to the technical field of electric appliance testing, in particular to a non-contact power system polarity testing device based on the principle of magnetic flux leakage. Background technique [0002] The purpose of the polarity detection of the attitude control nozzle of the power system is to detect the correctness of the action. When the system instructs a certain attitude control nozzle to open or close, it detects whether the nozzle is correctly executed. The closing is controlled by the solenoid valve, so the polarity detection can be realized by detecting the state of the solenoid valve. [0003] At present, the polarity detection is generally completed by a single tester with some test process cables and some peripherals. The sensitive signal can be current or vibration, and the detection is completed through the sensitive loop current or the vibration caused by the action of the solenoid valve. The tester for testing by ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the invention is that the existing polarity detection device has the problems of destructive test state, inability to directly interpret the valve action, high misjudgment rate and low safety factor, and further provides a non-contact polarity detection device based on the principle of magnetic flux leakage. Type Power System Polarity Test Device

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