Electromagnetic valve on-off state judgment method and device

A switching state and judging method technology, applied in the field of solenoid valve switching state judging methods and devices, can solve problems such as easy misjudgment and difficulty in vibration signal detection.

Inactive Publication Date: 2020-03-27
BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a method and device for judging the switching state of a solenoid valve, which not only overcomes the difficulty in detecting vibration signals in a stro...

Method used

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  • Electromagnetic valve on-off state judgment method and device
  • Electromagnetic valve on-off state judgment method and device
  • Electromagnetic valve on-off state judgment method and device

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Embodiment 1

[0065] see figure 1 , which is a functional block diagram of a device for judging the switching state of a solenoid valve provided in this embodiment. A solenoid valve switch state judging device, characterized in that it includes a magnetic circuit sensor, a vibration sensor, a magnetic circuit sensor conditioning module, a vibration sensor conditioning module, an A / D conversion module, and a processing module;

[0066] The magnetic circuit sensor is used to collect the magnetic flux leakage analog signal of the solenoid valve; the vibration sensor is used to collect the vibration analog signal of the solenoid valve; the magnetic circuit sensor conditioning module is used to adjust the voltage of the magnetic flux leakage analog signal to A / Within the sampling voltage range of the D conversion module; the vibration sensor conditioning module is used to adjust the voltage of the vibration analog signal to the sampling voltage range of the A / D conversion module; the A / D conver...

Embodiment 2

[0114] Based on the above embodiments, this embodiment provides a method for judging the switch state of the solenoid valve. see image 3 , which is a functional block diagram of a method for judging the switching state of a solenoid valve provided in this embodiment. A method for judging the switch state of an electromagnetic valve, comprising the following steps:

[0115] S1: Collect the magnetic flux leakage analog signal and vibration analog signal of the solenoid valve.

[0116] S2: converting the magnetic flux leakage analog signal and the vibration analog signal into a magnetic flux leakage digital signal and a vibration digital signal respectively.

[0117] S3: Extracting an impact signal from the vibration digital signal based on a wavelet transform method.

[0118] It should be noted that the extraction method of the impact signal is the same as the extraction method of the processing module in a device for determining the switch state of a solenoid valve, so this...

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Abstract

The invention provides an electromagnetic valve on-off state judgment method and device, and the method comprises the steps: judging the on-off state of an electromagnetic valve through detecting a weak impact signal generated when the electromagnetic valve is closed and combining with non-contact magnetic flux leakage measurement; and when the impact signal is detected and extracted and the magnetic flux leakage digital signal is higher than a threshold value, judging the electromagnetic valve switch to be in a closed state, and when the magnetic flux leakage digital signal is lower than thethreshold value, judging the electromagnetic valve switch to be in an open state. Therefore, the invention provides a method for combining impact signal extraction and magnetic flux leakage measurement based on wavelet transform, which not only overcomes the difficulty in vibration signal detection in a strong noise environment, but also solves the problem that the existing detection method is easy to misjudge, and is beneficial to improving the reliability of electromagnetic valve control in spacecrafts and industrial equipment.

Description

technical field [0001] The invention belongs to the technical field of signal detection, and in particular relates to a method and a device for judging the switching state of an electromagnetic valve. Background technique [0002] Solenoid valve is an important control component. It is used in various aerospace vehicles and various industrial equipment. The reliability and performance of solenoid valve determine the success or failure and performance level of the engine. It is very important in the engine that has been started many times, especially In the attitude control engine, it is precisely because of the use of the solenoid valve that the repeated start and pulse work of the engine are realized. Therefore, the detection of the working state of the solenoid valve is very important. At this stage, the method of detecting the working state of the solenoid valve has vibration detection. , Current detection and magnetic flux leakage detection. Although these methods have ...

Claims

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Application Information

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IPC IPC(8): G01M13/003
CPCG01M13/003
Inventor 姜寅啸唐学术
Owner BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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