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Portable crack length-measuring apparatus and method

A technology for crack length and measuring device, which is applied to measuring devices, optical devices, instruments, etc., can solve problems such as low efficiency of measuring means, and achieve the effects of simple structure, improved detection efficiency and low cost

Inactive Publication Date: 2015-09-23
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the inefficiency of the existing measuring means, the present invention provides a simple and easy-to-operate measuring device, which can realize fast and accurate measurement of the length of cracks on the surface of the bridge structure, and complete the measurement data on the spot Read and record to improve the efficiency of engineering practice

Method used

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  • Portable crack length-measuring apparatus and method
  • Portable crack length-measuring apparatus and method
  • Portable crack length-measuring apparatus and method

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Embodiment

[0033] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0034] Such as Figure 1 to Figure 6 As shown, the steel bridge crack length measurement device consists of a body 1, a liquid crystal display 2, a shutter and a switch 3, a focus button 4, a sliding mark 5, a sliding track 6, a sliding mark positioning button 7, an operating button 8, and a lens 9 , a first infrared distance measuring device 10, a second infrared distance measuring device 11 and a third infrared distance measuring device 12, a flashlight 13, a USB inter...

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Abstract

The invention discloses a portable crack length-measuring apparatus and method. The apparatus includes an image obtaining part, a range finding part and an image processing part. The image obtaining part is used for photographing and recording shape images of a crack. The range finding part is used for obtaining distance data. The image processing part is used for correcting a binding distance data affine relation for a cracked image, segmenting the corrected and recovered cracked image, and calculating the length of the crack. The method includes the steps of obtaining the cracked image, affining and recovering the image by measuring distances, segmenting the cracked image, calculating the length of the crack, etc. The apparatus is simple in structure and low in cost, is easy to operate, is not restricted by distances or shooting angles, and enables the on-site crack measuring efficiency to be improved.

Description

technical field [0001] The invention relates to a portable measuring device and method for fatigue damage crack length on the surface of a bridge structure, which is mainly used for measuring the crack length on the surface of a bridge structure, and belongs to the field of bridge engineering monitoring equipment in civil engineering. Background technique [0002] Orthotropic bridge structural surfaces are widely used in the construction of long-span bridges. As the upper flange of the main girder, the surface of the bridge structure directly bears the wheel load of the vehicle during the use of the bridge. The surface of the bridge structure is welded by several thin plates such as panels and longitudinal and transverse stiffeners. There are arc-shaped gaps at the intersection of the welds. The structural details are quite complicated. Under the joint action of the steel plates such as the intersection welding of the top plate and the stiffener, the butt welding joint of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
Inventor 谢发祥叶蕾周骛陈林吉伯海傅中秋王秋东
Owner HOHAI UNIV