环境自适应高灵敏度光纤声传感器研究

项目名称： 环境自适应高灵敏度光纤声传感器研究

项目编号： No.61501425

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 逯丹凤

作者单位： 中国科学院电子学研究所

项目金额： 21万元

中文摘要： 光纤声传感器结构简单，灵敏度高，传输损耗小，探测频谱宽，抗电磁干扰，与光纤通信网兼容性好，是继驻极体声传感器之后的新一代声波探测器件，在工业、军事等领域具有广泛应用前景。然而，现有的光纤声传感器环境适应性差，尤其是干涉型光纤声传感器，其工作点易随温度漂移，不能满足实际应用要求。针对这一关键问题，本项目提出结构自补偿方法和自适应信号处理算法相结合的全新解决方案。为了验证该方案的可行性，本项目将主要研究如下内容：建立光纤FP腔声传感探头的结构自补偿仿真模型，设计声传感探头的自补偿结构并研究其制作工艺；探索光纤FP腔声传感器随环境变化的信号漂移规律，进而研究传感器自适应信号处理算法；构筑自适应测试平台并系统测试传感器性能，评估结构自补偿方法和自适应信号处理算法对传感器性能的改进效果，通过改进优化，使光纤FP腔声传感器具有较强的环境自适应本领。本项目的成功实施将为光纤声传感器的实用化奠定基础。

中文关键词： 光纤声传感器；环境自适应；结构自补偿；自适应信号处理算法；光纤FP腔

英文摘要： Fiber acoustic sensors, as a next-generation acoustic wave detector, have wide applications in industry and military fields, because they have some extraordinary advantages, such as high sensitivity, simple structure, low propagation loss, wide frequency response, good resistance to electromagnetic interference, and good compatibility with fiber communication network. However, the present fiber acoustic sensors have a poor ability of environmental adaption, especially for interferometric fiber acoustic sensor, this shortcoming limits their practical applications. In this project, we put forward a novel proposal of structural self-compensation combined with adaptive signal processing algorithm to solve this fatal problem. To validate the proposal, we will carry out the following research tasks: to build a theoretical model of structural self-compensation of fiber FP cavity probe, to design the architecture of the probe and optimize the fabrication processes; to explore the output signal of the fiber acoustic sensor varied with the change of environmental conditions, then to study the signal processing algorithm; to build a test platform, and to evaluate the effects of the structural self-compensation and the adaptive signal processing algorithm by testing the performance of the prototype systematically. A fiber acoustic sensor prototype with good ability of environmentally adaption could be realized by optimizing the self-compensation structure and the signal processing algorithm. This project will lay a foundation on developing practical fiber acoustic sensors.

英文关键词： Fiber acoustic sensor;Environmental adaption;Structural self-compensation;Adaptive signal processing algorithm;Fiber FP cavity