Bridge bottom surface crack detection method based on unmanned aerial vehicle vision
A detection method and unmanned aerial vehicle technology, applied in the direction of measuring devices, optical testing of flaws/defects, and material analysis through optical means, can solve problems such as slow speed, high missed detection rate, and heavy workload, and achieve fast speed , Accuracy guarantee, and the effect of low missed detection rate
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[0059] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0060] The research object selected for the experiment is the Nth span of a box girder bridge, which was built in 2001 and the specific size is 5×13m. The bottom of the box girder bridge is flat and there are fewer obstacles at the bottom, which is beneficial to flight safety. Box girder bridges occupies a large part of highway bridges and are representative.
[0061] A method for detecting cracks on the bottom surface of a bridge based on drone vision, including steps:
[0062] 1. Choose the developer version of Jingwei 100 drone produced by DJI [1] , Equipped with Guidance ultrasonic sensor and stereo vision system to avoid drone collision; equipped with zoom HD camera, LED flashlight connected to the console via USB interface, laser ranging sensor.
[0063] 2. The measurement accuracy of the calibrated camera is 0.1mm, and the coverage area is 500mm×400mm. The ...
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