Motor vibration detection and diagnosis method

Abstract

The invention relates to a motor vibration detection and diagnosis method. The method includes the following steps that: initial correction is performed on a wireless vibration sensor; the sampling frequency of a three-axis acceleration sensor is adjusted according to the real-time frequency of a motor; the acceleration sequence of a whole period is acquired; noise signals in the acceleration sequence are filtered out through a band-pass filter and a sliding window mean filter; numerical integration is performed on the denoised acceleration sequence, so that a speed sequence and a displacementsequence are obtained; whether any one of the peak value of the denoised acceleration sequence, the effective value of the speed sequence and the peak value of the displacement sequence exceeds a setsafety threshold value is judged, if one of the peak value of the denoised acceleration sequence, the effective value of the speed sequence and the peak value of the displacement sequence exceeds theset safety threshold value, Fourier transformation is performed on the denoised acceleration sequence, so that an acceleration frequency spectrum is obtained, and stored in the memory of a microprocessor; the data in the memory of the microprocessor are sent to a monitoring end, and fault diagnosis is performed on the motor on the basis of frequency multiplication information received by the monitoring end, so that a detection and diagnosis result is obtained. The method has the advantages of low cost, low power consumption, low calculation amount and high detection precision.

Description

technical field [0001] The invention relates to the field of motor diagnosis, in particular to a motor vibration detection and diagnosis method. Background technique [0002] All kinds of motor equipment are widely used in industrial sites. Often a large factory is equipped with thousands or even tens of thousands of motors to jointly promote the operation of the factory assembly line. As a kind of persistent equipment, the stability and reliability of the motor greatly affect production activities. In large-scale industrial production sites, any hidden danger in any link of the motor equipment may force production to be interrupted, or cause serious accidents. , resulting in significant loss of life and property. For the performance of rotating machinery, relevant departments have formulated corresponding national standards based on the vibration amplitude, so as to determine whether the working state of a rotating machinery is healthy, and provide advice for maintenance a...

AI Technical Summary

Problems solved by technology

However, when the motor speed changes, the vibration data collected by the fixed sampling frequency detection method is often not the whole cycle data, which makes the calculation results deviate, and the collected speed electrical signals and acceleration electrical signals often contain noise signals. Therefore, the accuracy of diagnosing motor fault results is low and needs further improvement

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