Concrete bridge bottom crack detecting device

Abstract

The invention discloses a concrete bridge bottom crack detecting device, which is used for detecting cracks on a bridge bottom. A bridge detection vehicle is used as a work platform, and the device comprises a walking chassis, a camera direction and posture adjustment module and a crack detection module, wherein the walking chassis is arranged on a truss arm of the bridge detection vehicle, and can make linear reciprocating movement on the truss arm; the camera direction and posture adjustment module is arranged on the walking chassis and used for adjusting the direction and posture of the crack detection module; and the crack detection module is arranged on the camera direction and posture adjustment module and used for detecting cracks on the bridge bottom. By the adoption of the detecting device, quick detection of a bridge bottom crack image can be realized, and related data recorded by the system can be provided to engineers for evaluation on the crack damage conditions of a bridge and later analysis research.

Description

technical field [0001] The invention relates to the field of bridge detection, in particular to a bridge crack damage detection device. Background technique [0002] More than 90% of the damage of concrete bridges is caused by cracks. Engineering practice and theoretical analysis show that almost all concrete components work with cracks, but some cracks are so thin that they are even invisible to the naked eye (<0.05mm), generally there is no major harm to the normal use of the structure, and their existence is allowed; However, under the action of load or external physical and chemical factors, some cracks will continue to generate and expand new cracks, forming penetrating joints and deep joints. Cracks above 0.20-0.30mm will directly destroy the structural integrity, causing concrete carbonization, protection Layer spalling and steel bar corrosion form a mechanical discontinuity inside the bridge, which greatly reduces the bearing capacity of the bridge, and even coll...

AI Technical Summary

Problems solved by technology

The limitation of this instrument is that only after the human eye locks the crack target, the instrument can be used for subsequent measurements

[0005] There are the following defects in the detection of cracks at the bottom of the bridge by manual detection methods: (1) the cost of personnel is large

And many viaducts are hundreds of meters long, even thousands of meters long, requiring a considerable amount of manpower, but the number of people carried on a working platform is very limited, so the work intensity is quite high

(2) Low efficiency and accuracy

Long hours of work under the bridge can easily cause the fatigue of inspectors, which in turn affects work efficiency

(3) Unsafe factors exist

This method is difficult to guarantee the quality of the collected images, and the accuracy of the cracks that can be detected is not high

The above methods have shortcomings such as limited scope of application and high cost, and the existing bridge inspection vehicles are not fully utilized.

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