Fiber Bragg grating flexible sensor for deformation monitoring in steel structure engineering

In steel structure engineering, deformation monitoring is one of the key factors to ensure safe construction and stable operation. Traditional deformation monitoring methods usually use contact measurement, which has problems such as high operating costs, limited monitoring range, high monitoring error rate, and low accuracy. To solve the above issues, this article studied the fiber Bragg grating flexible sensor (FBGFS) and applied it to deformation monitoring in steel structure engineering to improve the reliability and accuracy of measurement. The design principle of FBGFS was studied, and the temperature compensation method was used to eliminate the impact of stability on the initial exit. Through SolidWorks, the sensor model was made using environmentally friendly materials, and the final sensor product was completed through 3D printing. The produced sensors were applied to deformation monitoring in steel structure engineering, and the wavelet analysis method was used to preprocess the sensor data. At the same time, a deformation monitoring model for steel structure engineering was constructed using the Kalman filtering algorithm. Using the FBGFS to monitor the deformation of steel structure engineering, the average error rate of 50 experiments was only 1.46%. When the monitoring time for steel structures was 10 years, the operating cost of using the FBGFS for monitoring was 167 200 yuan, which was 152 500 yuan lower than the operating cost of using fiber Bragg grating acceleration sensors for monitoring. Applying the FBGFS to steel structure deformation monitoring can effectively improve the accuracy of monitoring and expand the monitoring range, which is of great significance for the development of steel structures.