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
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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

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  • General video flexibility measurement system insensitive to ambient light

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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...

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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

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Application Information

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