Fiber grating acceleration sensor with integrated differential structure

An acceleration sensor and fiber grating technology, applied in the sensor field, can solve the problems of reliability, thermal stability frequency response and insufficient sensitivity, and achieve the effect of eliminating thermal influence, simple installation process, and reducing process difficulty.
CN105842479AInactive Publication Date: 2016-08-10BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
Publication Date
2016-08-10
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a fiber grating acceleration sensor with an integrated differential structure, which belongs to the technical field of sensors. Including a support structure (101), an elastic beam (102), a proof mass (103) and an optical fiber (105) with two optical fiber gratings (104), passing the optical fiber (105) with two optical fiber gratings (104) through Glue or solder joints (106) are tensioned and aligned on the support structure (101) and proof mass (103). Its advantage is that the structure is simple, and the supporting frame, the elastic mass and the mass block are integrated structures, which have the characteristics of high reliability and good thermal stability, and improve the working consistency of the sensor while reducing the difficulty of the process; at the same time, it adopts differential In the measurement method, the tensile stresses of the two fiber gratings are respectively in the state of increasing or decreasing at the same time, and the outputs of the two fiber gratings are subtracted, which can effectively eliminate the thermal influence and double the sensitivity of the sensor compared with a single fiber grating; at the same time, the present invention It also has the characteristics of high frequency response.
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Description

technical field

[0001] The invention relates to an optical fiber grating acceleration sensor with an integrated differential structure, which uses the optical fiber grating as a sensitive device, and belongs to the technical field of sensors. Background technique

[0002] Optical fiber sensing technology began to develop as an emerging technology, and it is also a new discipline and new field that has sprung up in recent years. Due to the outstanding advantages of insulation, anti-electromagnetic interference, and wavelength division multiplexing, fiber optic sensors have become sensors of great concern for special environments and large-scale engineering structure measurements. The acceleration sensor in the general engineering field is a piezoelectric acceleration sensor, which is more sensitive to insulation and electromagnetic interference in use, and the wires used also have obvious restrictions on long-distance measurement. Focus on technology hotspots, among which th...

Claims

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