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System and method for inspecting subway tunnel segment structure defects through multi-lens shooting

A technology for tunnel segment and structural defects, which is applied in the direction of optical testing for flaws/defects, image data processing, instruments, etc., and can solve problems such as inconvenient grasp of disease development process, error-prone, and manual input workload

Pending Publication Date: 2020-09-01
武汉至科检测技术有限公司
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  • Claims
  • Application Information

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Problems solved by technology

The patent requires that the actual disease conditions of the target tunnel be entered in the form of manual investigation, and that photos of on-site diseases are manually taken for archiving of the corresponding diseases. Manual input is heavy workload, prone to errors, and difficult to grasp the accurate disease development process

Method used

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  • System and method for inspecting subway tunnel segment structure defects through multi-lens shooting
  • System and method for inspecting subway tunnel segment structure defects through multi-lens shooting

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Experimental program
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Embodiment approach

[0062] As an implementation, the method includes:

[0063] (1) Based on the acquisition platform and multiple sets of lenses, the base map image data of the segment is collected, and the image data of the existing diseased area is obtained based on the telephoto lens.

[0064] (2) After image distortion correction and image enhancement of the collected data, the images after image distortion correction and image enhancement processing are imported into the spatial three-dimensional processing software to automatically match the same-name points, and the relative points are obtained after self-owned network adjustment. Orientation results; based on the relative orientation results, the absolute orientation results are obtained by adding control points on the image and performing joint calculations; based on the absolute orientation results, point cloud encryption processing is performed to obtain high-density and high-precision dense images. point cloud data. After the above p...

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Abstract

The invention discloses a system for inspecting subway tunnel segment structure defects through multi-lens shooting. A light, efficient and safe acquisition platform is adopted to realize acquisitionof various data; three-dimensional reconstruction of a tunnel scene model with scale information is carried out based on the collected data; and detection of a new disease area and monitoring of an existing disease area are carried out based on the reconstructed three-dimensional scene model in combination with image data, so that the occurrence and development process of diseases is mastered, anda powerful data support is provided for timely maintenance and safety management of subway tunnel segments. The invention further discloses a method, three-dimensional reconstruction with scale information is adopted, a reconstructed image has measurement capability, tunnel inspection is performed based on a three-dimensional reconstruction result, and the position and the range of a disease canbe directly obtained; remote processing is carried out based on the cloud platform technology, segment defects are accurately obtained, and the disease development process is mastered.

Description

technical field [0001] The invention relates to the field of defect detection of tunnel segments, in particular to a system and method for inspecting structural defects of subway tunnel segments by using multi-lens shooting. Background technique [0002] The inspection of traditional tunnel segment structural defects adopts manual methods, and a platform dedicated to subway segment inspection needs to be moved. The inspection time is from 0:00 to 3:00 in the morning. During the detection period, personnel are prone to fatigue, the internal light is insufficient, and all the tools brought in need to be taken out in full to prevent the subway train from derailing. [0003] The prior art needs to set up a detection platform, which consists of two parts, the chassis is composed of four rubber wheels, and the upper part is formed by two sets of scaffolding. The manual census team consists of 4 people, 2 of whom are responsible for advancing the testing platform, and the other 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88G06T17/10G06T5/00
CPCG01N21/8851G06T17/10G06T2207/10028G01N2021/8874G01N2021/8887G01N2021/888G06T5/77
Inventor 陈进华聂敏杨敏李康焦严令许先羽
Owner 武汉至科检测技术有限公司
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