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

General video flexibility measurement system insensitive to ambient light

A deflection measurement and ambient light technology, which is used in measurement devices, elasticity testing, and machine/structural component testing. Maintain high efficiency and improve accuracy

Inactive Publication Date: 2016-12-14
BEIHANG UNIV
View PDF5 Cites 30 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of being sensitive to ambient light and unable to perform high-precision long-distance real-time measurement in the prior art, the present invention proposes a universal video deflection measurement system that is not sensitive to ambient light based on an oblique optical axis digital image correlation method. Eliminate the influence of ambient light on the measurement results, and realize high-precision, long-distance, real-time, multi-point synchronous measurement

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
  • General video flexibility measurement system insensitive to ambient light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A universal video deflection measurement system that is not sensitive to ambient light, including: black and white industrial camera 1, industrial fixed-focus lens 2, electronic theodolite 3, distance measuring machine 4, tripod 5, high-brightness red LED target 6, and red light source The narrow bandpass filter 7 corresponding to the wavelength, the computer 8; the black and white industrial camera 1 is used to collect images, and the images are transmitted to the computer 8; the industrial fixed-focus lens 2 is used to collect clear images of the surface of the measured point; the electronic theodolite 3 is used to Install and erect a black and white industrial camera 1 and an industrial fixed-focus lens 2 to provide horizontal and vertical adjustments, so that the measured point can be placed in an appropriate position in the image. The distance measuring machine 4 is used to measure the distance from each point to be measured to the target of the black-and-white indu...

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 general video flexibility measurement system insensitive to ambient light. The general video flexibility measurement system comprises a black-and-white industrial camera (1), an industrial fixed-focus lens (2), an electronic theodolite (3), a distance measurement machine (4), a tripod (4), a high brightness monochromatic LED target (6), a narrow bandpass filter sheet (7) corresponding to monochromatic light source wavelength and a computer (8); a monochromatic LED target is installed on a tested point; a video flexometer with the narrow bandpass filter sheet installed on the lens is utilized to record the video image of the LED target in real time; and flexible data is obtained in real time through an image tracking algorithm on the basis of image gray correlation matching or characteristic points extraction. The general video flexibility measurement system is insensitive to the change of ambient light, can realize high precision measurement for displacement or flexibility at daytime or nigh, can calculate multiple object positions in one image, and realizes real-time dynamic measurement of displacement or flexibility of multiple detected points.

Description

technical field [0001] The invention relates to the technical field of detection and monitoring of bridges and other large-scale engineering structures, in particular to a multi-point real-time video measurement method for bridge deflection that is not sensitive to ambient light. Background technique [0002] Deflection is an important index to evaluate the safety of bridges, which directly reflects whether the deformation of the bridge structure reaches the dangerous range. Commonly used deflection measurement methods include dial indicator, level gauge, theodolite, etc., which have been widely used in bridge construction site inspection and acceptance appraisal, but these cheap and simple-structure measurement methods are only suitable for short-term and manual measurement of bridges, which are time-consuming, labor-intensive, Inconvenient to use, unable to achieve real-time measurement and other shortcomings. Therefore, some new deflection measurement instruments and met...

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
IPC IPC(8): G01B11/16G01M5/00
CPCG01B11/16G01M5/0008
Inventor 潘兵田垄
Owner BEIHANG UNIV
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