Method for monitoring and positioning concrete cracks by using elastic conducting film sensor and infrared thermal imaging technique

Abstract

The invention discloses a method for monitoring and positioning concrete cracks by using an elastic conducting film sensor and an infrared thermal imaging technique, comprising the following steps: 1)solidifying conductive coatings to form an elastic conducting film, laying the elastic conducting film on a concrete member and arranging leads at two ends of the elastic conducting film to form theelastic conducting film sensor; 2) when discovering cracks on the concrete member or carrying out routine inspection, connecting the leads at two ends of the elastic conducting film to a power supplyto be electrified to generate heat; 3) carrying out scan detection by using an infrared thermal imaging device; and 4) accurately determining the positions, quantity, trends, sizes and other information of the cracks according to the images obtained after scan detection by the infrared thermal imaging device. By the method, the resistivity of the elastic conducting film sensor on the positions ofthe cracks is increased, and the heat output on the positions of the cracks after electrifying is more than that on the common positions. The positions, quantity, trends, sizes and other information of the cracks can be accurately displayed by adopting the infrared thermal imaging device for scanning.

Description

technical field [0001] The invention relates to a method for monitoring and locating cracks generated in concrete dams, concrete buildings or concrete components, in particular to a method for monitoring and locating concrete cracks by using an elastic conductive film sensor and infrared thermal imaging technology. Background technique [0002] In the construction of houses, power plants, nuclear power plants, mines, airports, highways, dams, bridges, etc., a large amount of cement must be used. With cement as the basic raw material, it is poured into various concretes to form reinforced concrete structures. force-bearing members. Due to the long-term and repeated action of various pressures on steel bars and concrete during long-term use, their interiors are easily deformed or even cracked, posing safety hazards. In places with particularly high safety requirements, such as nuclear power plants, dams, bridges and other places, it is particularly important to continuously m...

AI Technical Summary

Problems solved by technology

[0003] The present invention is aimed at the monitoring device in the prior art, which can only monitor whether the stress-bearing components such as concrete are deformed or cracked, and cannot display the exact position of the deformation and cracking point, nor can it display whether deformation or cracking occurs at one point or multiple points Provide a method to measure and display the deformation of stressed members such as concrete, the exact location of crack points, and obtain information such as crack direction and size

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