Gross-volume monitoring sensing device for corrosion states and temperature field states of reinforcing steel bars in concrete

A technology of steel bar corrosion and sensing devices, which is applied to measuring devices, thermometers, and thermometers with physical/chemical changes. Self-compensation, to achieve the effect of rust state

CN103512850AInactive Publication Date: 2014-01-15SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-01-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a gross-volume monitoring sensing device for the corrosion states and the temperature field states of reinforcing steel bars in concrete, and a monitoring device with the gross-volume monitoring sensing device. The gross-volume monitoring sensing device comprises a broadband light source, a Y-shaped optical fiber coupler, a coupler connector, a sensing optical fiber, an LPFG (Long Period Fiber Grating) reinforcing steel bar corrosion sensing probe, an LPFG temperature sensing probe, an optical switch, a spectrograph and a computer, wherein the broadband light source enters the input end of the Y-shaped optical fiber coupler, is transmitted to the output end of the Y-shaped optical fiber coupler, is further transmitted to the LPFG reinforcing steel bar corrosion sensing probe and the LPFG temperature sensing probe respectively through the coupler connector and the sensing optical fiber, passes the optical switch, enters the spectrograph through the outgoing end of the optical switch, and is finally processed by the computer; then a curve of relationship between a transmitted spectrum and the corrosion states is output. By utilizing the device, the gross-volume monitoring on the corrosion states and the temperature field states of the reinforcing steel bars in the concrete can be realized.
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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 structur...

Examples

Embodiment

[0044] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0045] Depend on Figure 1-3 It can be seen that the full-volume monitoring sensor device for steel bar corrosion state and temperature field state in concrete includes broadband light source, Y-shaped optical fiber coupler, coupler joint, sensing optical fiber, LPFG steel bar corrosion sensing probe, LPFG temperature sensing probe, Optical switch, spectrometer and computer; broadband light source (using LG150 broadband light source) enters the input end of the Y-type optical fiber coupler, propagates to the output end of the Y-type optical fiber coupler, and then propagates to the The LPFG steel bar corrosion sensing probe and the LPFG temperature sensing probe interact with the measured environment in the tested environment to generate a coupling effect between the fiber core and the cladding, and then form a corresponding detection optical pa...