Research on Comparison Analysis of Fiber Grating Based Strain Monitoring Sensors in the Laboratory

Recently, the state has used fiber Bragg grating (FBG) measuring technology to monitor the safety of large building steel structure detection, power power, traffic road, geological earthquake and other industries. For example, the fiber Bragg grating strain sensor is an important detection equipment for seismic monitoring, and its measurement accuracy should be no less than 0.05% or higher. High-precision strain measuring instruments based on fiber Bragg grating technology have been studied at home and abroad, and the accuracy is required to be better than several microstrains and even reach the level of nanostrain. Therefore, it is of great significance to establish and improve the research on the calibration and measurement traceability of fiber Bragg grating strain sensor in order to adapt to the continuous development of fiber Bragg grating measurement technology and use requirements. Transport highway research institute by combining traffic engineering disciplines, mechanical design, mechanical processing and materials engineering disciplines such as professional knowledge, has carried on the finite element analysis, the analysis of the mathematical model validation, design the laboratory can use online calibration device such as a cantilever beam intensity, finally realizes the comparing the fiber Bragg grating strain sensor testing in the laboratory.