Evaluating method for engineering applicability of fiber bragg grating strain sensor

Abstract

The invention belongs to a measuring technology and especially relates to an evaluating method for engineering applicability of a fiber bragg grating strain sensor. The evaluating method comprises a functional test step and a durability test step. According to the evaluating method, the operation is convenient and fast. The evaluating method is characterized in that: specific to the practical engineering application, a real structure is adopted for performing experimental verification on the engineering applicability. Compared with a more mature and wide resistance strain gauge of the present engineering application, the evaluating method has the advantages that the engineering applicability is evaluated through the test, the technical maturity and the existing main problems of the fiber bragg grating strain sensor are deeply known, the reliable and effective data is supplied for improving the strain sensor, gradually increasing the technical maturity of the engineering application, guiding the fiber bragg grating strain sensor to an engineering practical stage from a laboratory stage, realizing the sensing engineering application capability, meeting the demand of the engineering application and monitoring the structural health on the basis of a sensor technology, and a powerful support is supplied to the wide engineering application of the fiber bragg grating strain sensor and the development of a monitoring sensing technology.

Description

technical field [0001] The invention belongs to measurement technology, in particular to an engineering applicability evaluation method of a fiber grating strain sensor. Background technique [0002] The working principle of the fiber grating strain sensor is to use the wavelength of the grating to change under the influence of stress, and the wavelength change is designed with a linear relationship with the strain, and the strain change of the measured object can be obtained according to the change of the sensor wavelength The amount of strain can be either positive or negative. In terms of measuring strain, compared with traditional resistance strain sensors, it has the advantages of small size, light weight, wide bandwidth, high sensitivity, strong anti-electromagnetic interference ability and strong corrosion resistance. , is not affected by optical power fluctuations, integrates sensing and transmission, is easy to embed in the material, and has the advantages of high-...

AI Technical Summary

Problems solved by technology

However, there are still many immature aspects of fiber grating strain sensor technology, and most of the technology is still in the laboratory stage. How is its applicability in engineering applications and how to evaluate it? At present, there is no fiber grating strain sensor in engineering applications. Test methods previously evaluated for their engineering suitability

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