Non-contact small vibration visual measurement method

A micro-vibration and visual measurement technology, applied in the field of computer vision, can solve problems such as measurement and analysis of micro-vibration signals, and achieve the effect of fast measurement speed and high measurement accuracy
CN110440902AActive Publication Date: 2019-11-12HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2019-11-12

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Abstract

The invention discloses a non-contact small vibration visual measurement method. The method aims to study the frequency characteristics of small vibration signals, and the technology mainly comprisessmall vibration signal extraction, camera motion interference suppression processing, signal analysis and the like. The method comprises the following steps of step S1, collecting video data of a vibrating object in the natural world to extract small vibration signals; step S2, converting the small vibration signals into a frequency domain by using a Fourier transform to obtain a spectrum thereof;step S3, extracting a camera motion signal from the video data, and analyzing the camera motion signal to obtain an attenuation coefficient vector Coe; and step S4, multiplying the attenuation coefficient vector Coe by spectrums of the respectively micro vibration signals, and obtaining a vibration target spectrum after averaging.
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Description

technical field

[0001] The invention belongs to the technical field of computer vision, and relates to a non-contact micro-vibration visual measurement method in a real scene. Background technique

[0002] The vibration characteristics of a vibrating object are closely related to its own state. For example, the vibration information generated during the operation of an industrial system reflects its structural characteristics and operating status. Bad vibration not only affects the performance of the system, but even has serious safety consequences.

[0003] The existing vibration measurement methods are divided into two types: contact and non-contact. Contact vibration measurement sensors, such as piezoelectric sensors, acceleration sensors, etc., are generally installed on the surface of the object to be measured, and the vibration measurement is realized by converting the vibration signal into an electrical signal. During the measurement process, the mechanical loss of...

Claims

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