Concrete reinforcement erosion wireless detecting method and sensor

A concrete steel bar and wireless detection technology, which is applied in the fields of weather resistance/light resistance/corrosion resistance, instruments, measuring devices, etc., can solve the problems of heavy detection workload, easy damage, and large influence of external factors

Inactive Publication Date: 2008-08-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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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  • Concrete reinforcement erosion wireless detecting method and sensor
  • Concrete reinforcement erosion wireless detecting method and sensor
  • Concrete reinforcement erosion wireless detecting method and sensor

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Embodiment Construction

[0015] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] The sensor structure that the present invention adopts is as figure 1 ,Depend on figure 1 The reading part (a) and the sensing part (b) are composed.

[0017] The method of the present invention specifically comprises the following contents (as figure 1 ):

[0018] (a), sensor production: by figure 1 The reading part (a) and the sensing part (b) are composed.

[0019] The production of the sensor part: select a suitable capacitor, select a thicker enameled wire to wind the plastic core several times to make an inductance coil, and add a magnetic core in the middle of the coil, select the steel wire for detection, and then press as follows figure 1 The circuit shown is connected into a loop, and the steel wire is used as a switch of the loop.

[0020] The steel wire switch I in the sensing part can also be re...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N27/02G01N33/38G08C17/02
Inventor 吴瑾李俊高俊启吴文操
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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