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A transmission shaft damage detection method and detection device

A damage detection and detection device technology, which is applied in the direction of measuring devices, machine gear/transmission mechanism testing, mechanical parts testing, etc., can solve the problems of transmission shaft damage, lack of applicable methods, and large environmental vibration and noise

Active Publication Date: 2018-12-14
WENZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the rapid detection device for the transmission shaft damage of the mechanical equipment with harsh working conditions, high environmental vibration and noise, and running due to the lack of applicable methods.

Method used

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  • A transmission shaft damage detection method and detection device
  • A transmission shaft damage detection method and detection device
  • A transmission shaft damage detection method and detection device

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Embodiment Construction

[0023] Embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0024] Such as figure 1 As shown, the technical solution adopted by the present invention includes first using the eddy current displacement sensor to non-contactly measure the four-way vibration signal of the transmission shaft, and then proposes a random decrement enhancement empirical mode decomposition method to extract the random decrement signal of the four-way signal, and through the fast Fourier transform , to obtain the fifth-order natural frequency of the damaged transmission shaft, and then take the average, and finally obtain the frequency of the damaged transmission shaft, which is used as the input of the damage diagnosis database based on the finite element model, and finally uses the particle swarm method to quantitatively diagnose the damage of the transmission shaft. Based on the detection method of the invention, a DSP development board ...

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Abstract

A transmission shaft damage detection method and detection device. First, the eddy current displacement sensor is used to measure the four vibration signals of the transmission shaft non-contact, and then a random decrement enhanced empirical mode decomposition method is proposed, and the resonance frequency of the four signals is extracted and averaged to obtain the frequency of the damaged transmission shaft, which is used as the damage model based on the finite element model. The input of the diagnostic database, and finally the particle swarm method is used to quantitatively diagnose the damage of the transmission shaft. The method of the present invention and the four-channel transmission shaft detection device based on the DSP chip can overcome the influence of the environmental noise of the transmission shaft detection, and is suitable for the actual operating conditions of the transmission shaft; the frequency change caused by the damage of the transmission shaft can be automatically identified and diagnosed without human participation; and The location and severity of drive shaft damage can be automatically diagnosed.

Description

technical field [0001] The invention belongs to the technical field of mechanical structure fault diagnosis, and relates to a transmission shaft damage detection method and a detection device. Background technique [0002] At present, with the rapid development of the national economy, the society's demand for mechanical equipment is expanding day by day. As the key core component of mechanical equipment, the transmission shaft, the safety accidents caused by its damage occur from time to time. Tracing it to its cause, one of the main reasons is that the transmission shaft in mechanical equipment generally lacks necessary rapid damage detection methods and devices. As far as mechanical equipment is concerned, due to the harsh working conditions, the transmission bearings are subject to large impact loads and random excitations, and are prone to damage and failure caused by fatigue damage. If the damage degree of the transmission shaft can be accurately identified in time, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/02
CPCG01M13/028
Inventor 向家伟
Owner WENZHOU UNIV