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Temperature insensitive FBG acceleration sensor and method based on strain chirp effect

An acceleration sensor and effect technology, applied in the sensor field, can solve the problems of temperature and strain cross-sensitivity, temperature insensitivity, etc., and achieve the effect of strong torsion resistance

Active Publication Date: 2022-06-24
INST OF DISASTER PREVENTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the present disclosure provides a temperature-insensitive FBG acceleration sensor based on the strain chirp effect, which solves the problem of cross-sensitivity between temperature and strain of the current FBG acceleration sensor

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  • Temperature insensitive FBG acceleration sensor and method based on strain chirp effect
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  • Temperature insensitive FBG acceleration sensor and method based on strain chirp effect

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Embodiment Construction

[0031] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0032] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0033] In the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combine...

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Abstract

The disclosure proposes a temperature-insensitive FBG acceleration sensor and method based on the strain chirp effect, including: a mass block, an M-shaped cantilever beam, a base, and a fiber grating; one side of the base is vertically fixed with a support rod, and the support An M-shaped cantilever beam is fixedly installed on one end of the rod, and a mass block is installed on the end of the M-shaped cantilever beam away from the support rod; the M-shaped cantilever beam is composed of two symmetrical triangles of equal strength, and the fiber grating is pasted obliquely In the non-uniform strain gradient region of an M-shaped cantilever beam. In the disclosed technical solution, the optical fiber grating is pasted on the non-uniform strain area of ​​the beam, and the optical fiber grating produces a chirp effect by applying a tensile load. Compared with the single cantilever beam, the optical fiber grating has strong torsion resistance.

Description

technical field [0001] The disclosure belongs to the technical field of sensors, and in particular relates to a temperature-insensitive FBG acceleration sensor and a method based on a strain chirp effect. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Fiber Bragg Grating (FBG) acceleration sensors are widely used in the field of health monitoring of large structures and infrastructures due to their advantages of immunity to electromagnetic interference, high sensitivity, long-distance transmission and easy integration. Earthquake disasters will cause different degrees of damage to building structures. Before and after earthquake disasters, the use of FBG acceleration sensors to obtain the natural frequency of structures and grasp the operating status of materials and structures is of great significance to the identification and evaluatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P15/03G01H9/00G01V1/18
CPCG01P15/03G01H9/004G01V1/18
Inventor 张瑞蕾唐彦东单维锋刘海军李忠李海君刘京会
Owner INST OF DISASTER PREVENTION