Detection device for detecting cracks in bottom surface of bridge

Abstract

The invention discloses a detection device for detecting cracks in the bottom surface of a bridge. The detection device comprises two walking rails, a supporting assembly, a detection assembly and a controller unit, wherein the supporting assembly comprises a supporting frame and a driving mechanism; the supporting frame is arranged between the walking rails and is driven by the driving mechanismto move along the walking rails; the detection assembly comprises a plurality of cameras, a crawling supporting table and a ground penetrating radar fixed to the crawling supporting table; the plurality of cameras are equidistantly arranged on the supporting frame; the crawling supporting table is movably connected with the supporting frame; the controller unit receives and judges images shot by all the cameras, generates a walking trajectory of the crawling supporting table when cracks in the bottom surface of the bridge are determined, then controls the crawling supporting table to walk along the walking trajectory, detects the depths and the widths of the cracks of the bridge through the ground penetrating radar, and saves data. The detection device achieves automatic detection, has high detection precision, and is applicable to detection of the large-span and irregular cracks.

Description

technical field [0001] The invention belongs to the technical field of bridge detection, and in particular relates to a detection device for cracks on the bottom surface of bridges. Background technique [0002] Cracks on the surface of the bridge mean that structural damage has occurred inside the bridge, and outside water vapor can easily enter the interior of the bridge, thereby accelerating the corrosion of steel bars, which in turn leads to a decrease in the bearing capacity of the bridge, seriously affecting people's safe travel. Therefore, capturing and inspecting cracks on the surface of bridges in time is of great significance for predicting or discovering engineering dangers in time, ensuring reliable operation of bridges and prolonging the service life of bridges. [0003] Bridge inspection in the prior art mainly includes two methods: manual inspection and bridge inspection vehicle inspection. Manual inspection is mainly to observe the cracks at the bottom of th...

AI Technical Summary

Problems solved by technology

Manual inspection is mainly to observe the cracks at the bottom of the bridge through a telescope, or to observe the cracks on the bottom of the bridge with the naked eye at close range by building a platform at the bottom of the bridge, record the length and width of the cracks, and judge the growth of cracks through multiple inspections However, this detection method relies on personal experience, is easily affected by subjective factors, and has low detection efficiency; the bridge inspection vehicle mainly moves along the extension direction of the bridge, uses the camera to take pictures, and judges whether there are cracks. The detection accuracy depends on the accuracy of image matching, and the requirements for the camera are very high, and it is not suitable for large-span and irregular cracks

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