基于光纤延迟的准分布式光纤温度传感器研究

项目名称： 基于光纤延迟的准分布式光纤温度传感器研究

项目编号： No.61271030

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 邱琪

作者单位： 电子科技大学

项目金额： 88万元

中文摘要： 分布式光纤温度传感器沿着传输光纤测量各个位置的温度情况,广泛应用于电力设备、桥梁、大坝和隧道中。通常采用分布式光纤光栅和非线性后向散射两类技术，具有测量系统较复杂，且成本较高的特点。为了解决上述技术问题，本项目提出了一种基于光纤延迟技术的准分布式光纤温度传感方法，通过测量光信号在光纤中的附加传输延迟得到温度。 主要研究内容包括：①研究光纤的传输延迟与温度特性，建立温度传感的理论模型；②建立光纤延迟与温度的测试平台，研究温度与延迟的线性关系、测量精度和和测量范围；③设计多波长基于光纤延迟的准分布式光纤温度传感器；④建立准分布式温度传感实验系统，优化系统设计。 本项目创新之处在于：①提出了基于光纤延迟的温度测量方法；②建立了多波长基于光纤延迟的准分布式光纤温度传感系统。 本项目的目标：致力于降低成本，同时提高温度的测量范围，实现低成本、大动态范围的光纤分布式温度传感，为应用打下坚实的基础。

中文关键词： 光纤延迟；温度传感；准分布式；波分复用；

英文摘要： Distributed optical fiber temperature sensors can provide temperature information along the optical fiber, they could be widely used in power equipments, bridges, dams and tunnels. Traditional distributed temperature sensors adopt either distributed optical fiber grating or nonlinear back scattering, two methods all need complex measurement systems and high cost. In order to solve the mentioned technical problems, a quasi-distributed temperature sensing method based on fiber delay line technology was put forward, temperature information was obtained by measuring additional delay of optical signal in fiber. The main research contents are included as follows: (1) Study on transmission delay and temperature character of optical fiber, establishing theoretical model of temperature sensing. (2) Establishing system of measuring optical fiber delay and temperature, study on linear relationship between optical fiber delay and temperature, and accuracy and dynamic range of temperature sensing. (3) Design of a quasi-distributed optical fiber temperature sensor based on multiple wavelength fiber delay line. (4) Establishing experimental system of quasi-distributed optical fiber temperature sensing, optimizing system design. Innovative points are included as follows: (1) Propose a method based on fiber delay line technolo

英文关键词： optical fiber delay；temperature sensor；quasi-distributed；wavelength division multiplexing；