A Reusable Fiber Bragg Grating Strain Sensor

Abstract

A reusable optical fiber grating strain sensor is characterized in that it includes a high-strength material housing (1), an optical fiber protection sleeve (2), an optical fiber (3), and a high elastic modulus material coating layer (4); The optical fiber (3) is provided with a grating (5), the outer surfaces of the optical fiber (3) and the grating (5) are coated with a high elastic modulus material coating layer (4), the part of the optical fiber (3) and the grating (5) They are all fixed and packaged in the high-strength material housing (1); the optical fiber protection sleeve (2) is located at both ends of the high-strength material housing (1), sleeved on the optical fiber (3), and the optical fiber protection sleeve (2) Partially embedded in the high-strength material housing (1); the first installation base (1b) and the second installation base (1c) of the high-strength material housing (1) are connected with the device to be tested.

Description

technical field [0001] The invention relates to a reusable optical fiber grating strain sensor, which belongs to the technical field of sensors. Background technique [0002] With the development of science and technology, fiber grating sensors have great application potential in aerospace, ships, civil engineering, petrochemical industry, electric power industry, nuclear industry, medicine and other fields. Fiber Bragg grating strain sensor has the advantages of anti-electromagnetic interference, small size, easy signal transmission, easy reuse, and good stability. It has important and extensive applications in measuring structural strain and monitoring structural health status. [0003] Fiber Bragg grating sensors have many advantages over conventional resistance strain gauges. But at the same time, the cost of a single fiber grating sensor increases a lot compared with the resistance strain gauge, especially the multi-point short-term monitoring will generate expensive e...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, and to propose a reusable fiber grating strain sensor, which overcomes the existing metal-encapsulated fiber grating strain sensor and the fiber grating strain sensor directly bonded to the fiber grating. The sensor is difficult to install and disassemble, can no longer be reused, and has high cost. It overcomes the problems of complex structure and manufacturing process, high processing precision requirements and slow production cycle of reusable fiber grating strain sensors.

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