Bridge cable surface damage dynamic detection method and device

Abstract

The present invention provides a dynamic detection method and device for surface damage of bridge cables. An intelligent detection device is arranged radially on the surface of bridge cables. The intelligent detection device travels at a constant speed on the surface of bridge cables through a driving device. A camera collects the surface image of the bridge cable and sends it to the image processing and recording system; the bridge cable surface damage dynamic detection algorithm program solidified in the system DSP chip judges whether there is damage in the collected image, and records the position of the positioning mechanism if there is damage Move the distance to accurately locate the injury site. The processing steps of the cable surface image are: parallel image acquisition; effective information interception; filtering and noise reduction; curved surface projection correction; target segmentation; defect identification and information storage. Through the above algorithm, the rapid identification, location and storage of the surface damage of the bridge cable are completed, so as to realize the purpose of dynamic detection of the surface damage of the bridge cable.

Description

technical field [0001] The invention relates to a dynamic detection method and a detection device for bridge cable surface damage, in particular to a method and device for judging whether there is a defect on the cable surface by using a DSP platform to perform a series of image processing algorithms on the cable surface image. Background technique [0002] At present, in the daily maintenance of cable bridges at home and abroad, there are two main aspects for the health inspection of the cable: (1) the detection of the surface protection material layer; (2) the inspection of the internal steel wire structure. The detection of the surface protective layer of the cable mainly includes the detection of the cracking, deformation and peeling of the outer protective layer due to the influence of sun, rain and load vibration. The main detection methods of the cable surface protection material layer in the prior art are two methods: manual observation method and laser scanning meth...

AI Technical Summary

Problems solved by technology

Due to the long stay cables, this method is not only time-consuming and labor-intensive, but also inefficient, and often brings safety hazards to the bridge maintenance staff.

The laser scanning method mainly uses two methods of photothermal technology and ultrasonic technology to realize laser scanning detection on the surface of the cable. The disadvantage of this method is that the detection of defects is not intuitive, the scanning line is a spiral line, there is a blind area, and the system is relatively large. Expensive, high cost of use

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