Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

Active Publication Date: 2019-11-12
HEFEI UNIV OF TECH
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally require humans to determine the frequency parameters of the band-pass filter based on prior knowledge, and have not effectively measured and analyzed tiny vibration signals.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Non-contact small vibration visual measurement method
  • Non-contact small vibration visual measurement method
  • Non-contact small vibration visual measurement method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] combine figure 1 , the non-contact micro-vibration visual measurement technology of the present invention comprises the following steps:

[0031] Step S1: collect video data of vibrating objects in nature to extract tiny vibration signals;

[0032] In this step, according to an embodiment of the present invention, specifically:

[0033] 1a) A Canon camera EOS 600D is used to capture a video of a vibrating object in a natural environment. The frame rate of the camera is 50 frames per second, the image resolution is 1280×720, the video acquisition time is 7 seconds, and it is saved in avi video format. Using color space conversion, it is converted from RGB space to YIQ space, and the video sequence of Y (brightness) channel is extracted for subsequent analysis.

[0034] 1b) Extract the first frame image in the video sequence, and manually select the vibration target region (ROI); use the canny operator to detect its edge, and then generate an edge mask Image Mask with ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
CPCG01H9/00
Inventor 杨学志张龙黄飞龙张礼俊辛宜曈张肖
Owner HEFEI UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com