Development And Uncertainty Analysis Of Fiber Bragg Grating Intelligent Strain Sensor System

Strain is the most direct response structures with local characteristics, is also an important physical quantity in large structures such as slope, tunnels, bridges and other engineering security monitoring. With the rapid progress of science and technology and industrial development, the construction of large-scale structure has entered the stage of rapid development. In order to ensure the safety of people's lives and property, reduce engineering accidents, the need for large-scale structure of the slope and other real-time safety monitoring. Large building fiber Bragg grating strain sensors compared to conventional electromagnetic strain sensor has a strong anti-electromagnetic interference capability, wide measurement range, the transmission loss, high accuracy and real-time, and other characteristics, can meet the needs of real-time monitoring, such as dams, slope, bridges, roads and has been widely used.This paper developed a fiber Bragg grating strain sensors detect variables corresponding to the theoretical and experimental studies. Binding GB/T 15972.3 total fiber specification-Part 3:Mechanical performance test methods, JJG 475-1986: electronic universal testing machine test procedures and JG/T 422-2013 Civil Engineering FBG strain sensors, research and develop high accuracy regression analysis of the degree of fiber grating sensor smart calibration system, to be put into operation and for the operation of the fiber grating strain sensors detect and calibration provides integrated hardware and software testing platform, FBG instrumentation data from original to be issued All test reports and centralized management of digital information. And FBG strain sensor test results error analysis and uncertainty evaluation. The main research topics are as follows:1.describes the grating Bragg grating sensor sensing mechanism should be disturbed, starting optical characteristics and optical fiber strain sensing mechanism and temperature compensation mechanism designed fiber Bragg grating from an optical fiber Bragg grating strain sensor structure.2.Build a fiber Bragg grating strain sensors intelligent verification platform, the detection platform set transmission, measurement and control mechanism and a computer intelligent computing, testing and calibration systems in one, and can automatically produce a comprehensive monitoring report hardware and software testing platform.3.Fiber Bragg grating strain sensors for testing. Through the intelligent sensor static calibration test platform index analysis, the corresponding sensor sensitivity, linearity and other technical indicators. Then the error data and the experiment was generated in the uncertainty analysis, the uncertainty of the sensor, and the resulting uncertainty traceable to national reference units.