Stress measuring instrument implementation method based on FBG (fiber bragg grating) sensor

Abstract

The invention provides a stress measuring instrument implementation method based on an FBG (fiber bragg grating) sensor, and the method comprises the following steps: 1, building a structure health monitoring system hardware platform, and determining a development board, a programming language and a process, which are employed by the hardware platform; 2, carrying out the demodulation through a field programmable gate array, and calculating the deviation of the central wavelength of the FBG sensor; 3, transmitting the wavelength data and wavelength deviation of the FBG sensor to an ARM part through a bus protocol; 4, carrying out the processing of the wavelength and deviation data of the FBG sensor through the high-speed operating capability of the ARM processor, and calculating a stress value; 5, carrying out the real-time transmitting and storage of the calculated stress value. Through the above steps, the method can achieve the measurement of the stress of a structure through the FBG sensor, and facilitates the health monitoring of the structure.

Description

technical field [0001] The invention provides a method for implementing a stress measuring instrument based on an optical fiber grating sensor, including functions such as data collection, transmission, processing, and storage of the optical fiber grating sensor, capable of realizing stress measurement based on the optical fiber grating sensor, and belongs to the field of structural health monitoring. Background technique [0002] Fiber Bragg grating sensors have the advantages of anti-electromagnetic interference, anti-corrosion, high sensitivity, intrinsically passive, and easy maintenance. It is more and more widely used in strong corrosive environment. [0003] At present, fiber grating sensors have good application prospects in the field of structural health monitoring. Using fiber grating sensors for structural health monitoring requires measuring the stress value of the structure, while the existing fiber grating demodulator can only resolve the wavelength of the fibe...

AI Technical Summary

Problems solved by technology

[0003] At present, fiber grating sensors have good application prospects in the field of structural health monitoring. Using fiber grating sensors for structural health monitoring requires measuring the stress value of the structure, while the existing fiber grating demodulator can only resolve the wavelength of the fiber grating. adjustment, the stress value of the structure cannot be calculated

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