Method for rapidly detecting cracks of tunnel lining

Abstract

The invention relates to a method for rapidly detecting cracks of a tunnel lining. The method comprises the steps that the surface of a tunnel is scanned by a vehicle-mounted CCD camera to obtain a crack image and the image is transmitted to an image acquisition card in real time; data of the crack image are transmitted to a computer by the image acquisition card; image discriminatory analysis processing is conducted on the data of the image by the computer, and therefore tunnel crack information is obtained, wherein the tunnel crack information comprises the positions, the lengths, the widths and the shapes of the cracks. The method is suitable for a road tunnel and a railway tunnel through different vehicle-mounted platforms and the application range is wide. Detection is conducted on the vehicle-mounted platform with the speed larger than 60km / h, an ideal detection result is obtained, and therefore detection cannot interfere in normal traffic in the tunnel. Fully-automatic data acquisition and processing are adopted, manual interference is not needed, detection speed is high, accuracy is high, and cost is low. The method is large in economic value and social value in the technical field of tunnel crack detection and is worthy of wide popularization and application.

Description

Technical field [0001] The invention relates to defect detection and image recognition technologies for roads and tunnels, and in particular to a method for rapid detection of tunnel lining cracks. Background technique [0002] At present, the method of tunnel crack detection is to pre-bury conductive coating on the surface of the tunnel lining, and detect the size of the resistance by electrical means to determine whether there is a crack. The Chinese public patent with the patent number 201220421638.9 and the name "Tunnel Lining Crack Detection System" provides a typical technical solution. Its schematic diagram is as follows figure 1 As shown, the inner surface of the tunnel lining 1 is provided with a conductive coating layer 2 forming a loop along the circumferential direction, and the conductive coating layer 2 is arranged along the longitudinal direction of the tunnel. By detecting the resistance value of the conductive coating 2 added on the inner surface of the tunnel li...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rapid detection method for tunnel lining cracks, which overcomes the shortcomings of the existing technology that requires pre-embedded sensors, cumbersome detection work, and incapable of quantitative measurement.

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