Optical fiber sensor on basis of carbon fiber materials

Abstract

The invention discloses an optical fiber sensor on the basis of carbon fiber materials. The optical fiber sensor comprises an annular frame, and is characterized in that a spiral cam, a detection arm, a cantilever beam and a support spring are arranged in an inner cavity of the annular frame, and a gear is fixed onto a fixing shaft; an upper fiber grating and a lower fiber grating which are completely identical to each other are respectively adhered on the upper surface and the lower surface of the cantilever beam, a rack which is meshed with the gear is arranged at one end of the detection arm, and the other end of the detection arm extends out of the annular frame. The optical fiber sensor has the advantages that a rotation angel of the spiral cam can be acquired by means of measuring a bent degree of the cantilever beam, so that the change volumes of cracks of walls can be finally determined; the optical fiber sensor not only can be used for measuring the cracks, but also can be used for measuring opening of air ducts and pipelines and local strain of buildings; the measurement precision and the measurement range can be changed by means of replacing gears and racks which have different sizes; change of internal relevant existing angles of the buildings, opening of valves, opening of blowing rate switches, towers in power communication field and swing conditions of overhead lines can be measured by the aid of the optical fiber sensor.

Description

technical field [0001] The present invention relates to an optical fiber sensor based on carbon fiber material, and more specifically, relates to an optical fiber sensor based on carbon fiber material provided with a helical cam and a gear meshing structure. Simultaneously, the sensor of the present invention can also measure the change of the relevant existence angle in the building, the opening of the valve, the opening of the air volume switch, the concrete engineering infrastructure in the field of electric power communication, and the swinging situation of the overhead line. Background technique [0002] Due to factors such as architectural design itself, construction technology, or the building has been used for a long time, cracks will appear on the building wall, and cracks will appear between the prefabricated part and the wall. Under the action of stress, the key parts of some buildings will also undergo changes such as deformation and displacement; moreover, with...

AI Technical Summary

Problems solved by technology

[0005] The existing sensors for detecting building cracks, deformation and angle changes are all electronic devices, which are not only susceptible to external electromagnetic interference, affecting the accuracy of measurement, but also prone to corrosion, which reduces the service life of the sensor

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