Concrete reinforcement erosion wireless detecting method and sensor

Abstract

A concrete reinforcement corrosion wireless testing method and a sensor belong to the field of the concrete reinforcement corrosion detecting technique. The sensor comprises a sensing part and a reading part. The sensing part is mainly a resonance circuit which comprises at least one capacitance that is connected to the two ends of the inductance coil after series-connection to the switch of the steel wire, and the switching-off and switching-on of the steel wire switch is controlled by whether the steel wire is corroded and disconnected; the reading part works with the LC oscillating circuit, according to the principle of the resonance circuit the resonance frequency of the sensing part is measured through the phase frequency characteristic curve of the impedance in order to judge whether the steel wire is corroded and broken. The invention can more accurately confirm the degree of the reinforcement corrosion and the speed by embedding sensing part at the vicinity of the electric field at the inner part of the concrete under the precondition that the concrete is not damaged, realizes the wireless transmission of the corrosion signal inside and outside the concrete, and can be applied to the detecting and evaluating of the durability of the reinforced concrete structure in the structural engineering field.

Description

technical field [0001] The invention relates to a wireless detection method and sensor for concrete steel bar corrosion, which belongs to the technical field of concrete steel bar corrosion detection, can perform long-term detection of steel bar corrosion in reinforced concrete members in any environment without damaging concrete, and is applied to steel bars in the field of structural engineering Durability testing and evaluation of concrete structures. Background technique [0002] Corrosion of steel bars in reinforced concrete is one of the main factors affecting the durability of structures. At present, the relatively mature non-destructive detection methods in its research methods mainly focus on the semi-potential method, concrete resistance method, etc., which determine the corrosion degree or speed of steel bars in concrete by measuring the electrochemical characteristics of the reinforced concrete corrosion system. Its transmission line is buried in the structure, ...

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Problems solved by technology

At present, the relatively mature non-destructive detection methods in its research methods mainly focus on the semi-potential method, concrete resistance method, etc., which determine the corrosion degree or speed of steel bars in concrete by measuring the electrochemical characteristics of the reinforced concrete corrosion system. The transmission line is buried in the structure, the detection workload is heavy, it is greatly affected by external factors, and it is easily damaged during the construction process

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