Cylinder special-shaped buckling detection device and recognition method

Abstract

The invention discloses a cylinder special-shaped buckling detection device and a recognition method. The device comprises a camera, a laser range finder, a level instrument and a tripod. Monocular vision and laser are combined for detecting the maximum diameter of the special-shaped buckling appearing after a concrete filled steel tubular column is detected to be subjected to low cyclic loading. Measurement requirements can be met, the maneuverability, the flexibility and the measurement accuracy of the measurement device can be improved, the phenomenon that the measurement efficiency and the measurement precision are reduced as the camera and the laser range finder mutually separated are used frequently in turn can be avoided; Hough transform based on secondary gray value processing is used, a circle tangent to points at two ends of the maximum diameter of the buckling is found and calculated, secondary gray value threshold processing is carried out, remaining noise points are reduced, and the accurate maximum buckling position at a sample and the maximum diameter of the special-shaped buckling can be acquired.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a detection device and recognition method for cylindrical irregular-shaped drum music. Background technique [0002] Modern engineering structures and bridges are developing towards long spans and heavy loads. Cylindrical CFST columns have the advantage of withstanding damage such as fracture, deformation, and instability. When subjected to nonlinear loads such as earthquakes and overloading, the damage of building structures will accelerate. People have used low-cycle repeated load tests to simulate earthquake stress, and studied the seismic performance of large-scale concrete-filled steel tube columns. Although image-based damage detection and crack identification research has become a hot topic, there is little discussion on the impact of concrete-filled steel tube columns before cracks occur. In the image detection of curved deformation, there is no three-dimensional speci...

AI Technical Summary

Problems solved by technology

At present, the detection of the degree of deformation and damage of drum music basically adopts the contact measurement method, which requires inspectors to use special equipment to carry out regular inspections. The work intensity is high, the inspection cost is high, and the safety requirements for the work are also high.

At the same time, since the drum surface is an irregular and special-shaped surface, it is easy to produce large measurement errors during manual measurement, and it is difficult to achieve high measurement accuracy.

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