The Using Research Of Fiber Optic Sensing Technology In Reservoir Water Temperature Monitory

Fiber Optic Sensing Technology employed the physics characteristics to obtain the real-time information of the detected external field(Such as the changes of pressure,temperature,electric fields,magnetic fields in environmental conditions).Fiber sensor,As a new technology based on the waveguide theory, has a number of distinguishing advantages. The Fiber sensors devices are simple, intrinsic, distributing sensing elements and have all the advantages normally attributed to fiber sensors, such as high sensitivity, resistant to electromagnetism disturbance and the chemical erosion, and waterproof .With the improvement of signal demodulation and analyses, The Fiber sensors have been wildly researched in many domains, such civil projects, spaceflight and navigation, electric power, petroleum and medical treatment.This thesis introduce that The Fiber Bragg Gratin temperature sensors and Distributed Fiber Temperature detection System using in reservior water temperature monitory .To the situation that the optical fiber instuments have not related standards and rules, this paper propose calibration process and temperature error test standard of Fiber Bragg gratin temperature sensor and distributed fiber. And combined with a specific project, analysis the basic rule of reservior water temperature change in front of dam. The key content of this thesis:1)Introducing the using of e Fiber Bragg Gratin temperature sensors and Distributed Fiber Temperature detection System,and the research present situation of reservior water temperature change in front of dam.2)This thesis systematically compile theoretical basis of sensing mordel in different stress and temperature influence,and the theoretical basis of Distributed Fiber Temperature detection System based on Raman scattering,Brillouin scattering,Rayleigh scattering.3)Because of Fiber Bragg gratin temperature sensor and distributed fiber are new sensors,to solve the problem of not related standards and rules, based on the experiments this thesis conclude calibration process and temperature error test standard of Fiber Bragg gratin temperature sensor and distributed fiber.4)Take a huge hydraulic project for example,it is the first time at home and abroad to fix upThe Fiber Bragg gratin temperature sensors and Distributed Fiber Temperature detection System in front dam, from the calibratted information this thesis conclude basic rule of reservior water temperature change.