Full-volume monitoring sensor device for steel bar corrosion state and temperature field state in concrete

Abstract

The invention discloses a full-volume monitoring sensor device for steel bar corrosion state and temperature field state in concrete and a monitoring device including it. The full-volume monitoring sensor device for steel bar corrosion state and temperature field state in concrete includes a broadband light source, Y Type fiber optic coupler, coupler connector, sensing fiber, LPFG steel corrosion sensing probe, LPFG temperature sensing probe, optical switch, spectrometer and computer; broadband light source enters the input end of Y-type fiber coupler and propagates to Y-type fiber The output end of the coupler, through the coupler connector and the sensing fiber, respectively propagates to the LPFG steel bar corrosion sensing probe and the LPFG temperature sensing probe, then passes through the optical switch, enters the spectrometer from the output end of the optical switch, and finally processes it by the computer Output the relationship curve between transmission spectrum and rust state. The full-volume monitoring of the corrosion state and temperature field state of steel bars in concrete can be realized by using the device.

Description

technical field [0001] The invention relates to a full-volume monitoring sensing device for steel bar corrosion state and temperature field state in concrete and a monitoring device including the same, belonging to the field of civil engineering sensor testing. Background technique [0002] Long period fiber grating (hereinafter referred to as LPG) is a sensing grating based on the coupling theory of core guided mode and cladding mode. It is very sensitive to the change of the refractive index of its surrounding environment, and then can obtain the concentration. The biological and chemical sensing technology based on this coupling theory has been widely used in many biochemical research fields such as the measurement of antigen content in blood, the identification of protein substances, drug screening, the detection of solution concentration, and the determination of the degree of degradation of sewage. [0003] With the wide application of reinforced concrete structures i...

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Problems solved by technology

[0010] Purpose of the invention: To overcome the shortcomings of the original concrete steel bar corrosion monitoring sensor that cannot realize the full volume monitoring of steel bar corrosion, simultaneous monitoring of corrosion state and temperature field, temperature compensation function, etc., and provide a highly sensitive, quasi-distributed on-line measurement A full-volume monitoring sensor device for the corrosion state of steel bars in concrete and a temperature field state for overall monitoring of steel bars and a monitoring device including it

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