An infrared detection device for potential exfoliation of shallow tunnel lining

Abstract

The present invention relates to a tunnel lining shallow layer potential peeling and stripping infrared detecting device. The device comprises a vehicle mobile platform, and further comprises an infrared lens, an infrared detector, an electronic signal processing system and a data processing system. The infrared lens, the infrared detector, the electronic signal processing system and the data processing system are all arranged on the vehicle mobile platform, and the infrared lens, the infrared detector and the electronic signal processing system are connected; the infrared radiation radiated from the outside is collected and focused on the infrared detector by the infrared lens; the infrared radiation is converted into an electrical signal by the infrared detector; the data processing system acquires a thermal image based on the amplified electrical signal, performs preprocessing on the thermal image, and extracts key geometric feature information of potential peeling and stripping. Compared with the prior art, by using the technical scheme of the present invention, the complicated detection environment in the tunnel can be effectively coped with, the recognition precision of the shallow layer potential peeling and stripping is improved, and the recognition result is more intuitive.

Description

technical field [0001] The invention relates to an infrared detection device for exfoliation, in particular to an infrared detection device for potential exfoliation in the shallow layer of tunnel lining. Background technique [0002] my country has now become the country with the most tunnels and underground projects, the most complex tunnel structure and the fastest development of tunnel construction in the world. Although my country has accumulated rich experience in the field of highway tunnel construction, there are a lot of uncertainties and immaturities in tunnel construction in terms of survey, design and construction. different degrees of disease. [0003] The existence of disease defects will greatly reduce the bearing capacity of concrete structures. If they are not dealt with in time, it will inevitably affect the safety and durability of concrete structures. The existence of hidden voids in the shallow layer of the tunnel not only changes the stress state of th...

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Problems solved by technology

[0006] At present, there are many detection methods in the field of non-destructive detection of tunnel lining disease. Patent CN108318488A "a subway tunnel disease detection device and detection method" proposes a subway tunnel disease detection device and detection method, wherein the subway tunnel disease detection device includes tunnel It is composed of flatbed locomotive, control operation integration device, image acquisition device and auxiliary light source; patent CN203925583U "Rapid and high-precision detection equipment for subway shield tunnel disease" proposes a detection equipment related to shield tunnel disease, specifically for subway shield tunnel disease Fast and high-precision detection equipment, including a walking device, a control device, and an image acquisition device; patent CN102346153A "a method for detecting tunnel defects" discloses a method for detecting tunnel defects, which includes obtaining images of tunnel structures through a camera system; After the collected image is denoised, the structural outline on the image can be directly identified, and the image recognition is performed twice on the basis of the identified structural outline to identify the disease phenomenon in the tunnel. The above method is mainly used for the apparent disease of the tunnel, such as cracks , The detection of water leakage is not suitable for the detection of spalling and peeling that may be caused by shallow hidden gaps in the lining

[0007] The commonly used image recognition detection method is not suitable for the detection of potential spalling in the shallow layer of the tunnel

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