Material surface strain fiber grating reverse differential detection sensing device

A technology of fiber grating and sensor devices, which is applied in the field of material surface strain fiber grating reverse differential detection sensor devices, which can solve the problems of low precision and short life

Inactive Publication Date: 2016-08-24
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of the resistance strain gauge is limited to a certain extent due to its susceptibility to the environment (such as electromagnetic field, temperature, humidity, chemical corrosion, etc.), low precision and short life.

Method used

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  • Material surface strain fiber grating reverse differential detection sensing device
  • Material surface strain fiber grating reverse differential detection sensing device

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Embodiment Construction

[0017] A material surface strain fiber grating reverse differential detection sensor device according to the present invention comprises a fiber Bragg grating (1), a fiber Bragg grating (2), a strain conduction arm (3), a strain extension arm (4), a screw Column welding foot (5), upper right angle reverse arm (6), lower right angle reverse arm (7) and base (8).

[0018] The strain conduction arm (3), the strain extension arm (4), the stud welding foot (5), the upper right-angle reverse arm (6), the lower right-angle reverse arm (7) and the base (8) are integrated metal structure.

[0019] The materials of the strain conduction arm (3), the strain extension arm (4), the stud welding leg (5), the upper right-angle reverse arm (6), the lower right-angle reverse arm (7) and the base (8) should be Choose materials that are consistent with the measured object to avoid thermal stress caused by differences in thermal expansion coefficients of different materials when the external tem...

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Abstract

The invention relates to the field of fiber grating sensing technologies, in particular to a material surface strain fiber grating reverse differential detection sensing device. The fiber grating reverse differential detection sensing device comprises two fiber Bragg gratings, a strain conduction arm, strain extension arms, a stud welding leg, an upper right-angle reverse direction arm, a lower right-angle reverse direction arm and a base, wherein the strain conduction arm, the strain extension arms, the stud welding foot, the upper right-angle reverse direction arm, the lower right-angle reverse direction arm and the base are connected in an integral manner; the fiber gratings are normal fiber Bragg gratings; the two gratings are consistent in performance; and one grating is fixed in grooves on the top ends of the two strain extension arms in an adhering manner, and the other grating is fixed in grooves of the two right-angle reverse direction arms in an adhering manner, and proper pre-stretching is applied in fixation. The material surface strain fiber grating reverse differential detection sensing device disclosed by the invention utilizes a reverse differential amplification principle so as to realize sensibilization for the fiber grating strain sensing sensor, and temperature compensating function can be provided.

Description

technical field [0001] The invention relates to the technical field of optical fiber grating sensing, in particular to a material surface strain optical fiber grating reverse differential detection sensor device. Background technique [0002] The resistance strain gauge measurement method is a basic traditional means of measuring strain. However, the application of the resistance strain gauge is limited to a certain extent due to its susceptibility to the environment (such as electromagnetic field, temperature, humidity, chemical corrosion, etc.), low precision and short life. The fiber Bragg grating strain sensor has the advantages of fast response, light weight, compact structure, flexible use, low cost, no electromagnetic interference and corrosion resistance, which makes it better for strain detection. [0003] Fiber Bragg grating (Bragg) is a section of optical fiber that uses the photosensitivity of the fiber core material to form a periodical change in the refractive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 刘月明张亮陈浩邹建宇夏忠诚高晓良
Owner CHINA JILIANG UNIV
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