摘要
为了解决恶劣环境下分布式光纤声音传感系统的声音还原问题,搭建了一种基于改进最小控制递归平均(IMCRA)算法的多通道光纤声音传感系统。采用Sagnac和Mach-Zehnder复合光路结构,以单模光纤作为传感单元拾取声音信号,借助光开关实现了多通道信号采集,并通过改进最小控制递归平均算法对声音信号进行降噪、还原及增强处理。实验结果表明:该系统可在长为4km的传感光纤上实现对单音信号和语音信号的多通道扫描拾取,并能够在复杂情况下实现对语音信号信噪比的有效提升,为光纤声音传感系统在恶劣环境下的应用提供了一种新途径。
In order to solve the problem of sound reduction in distributed optical sound sensing system in harsh environment,a multi-channel optical fiber acoustic sensing system based on improved minimum control recursive average(IMCRA) algorithm was established. The composite optical path structure of Sagnac and Mach-Zehnder was built,and the single-mode optical fiber was used as the sensing unit to pick up the sound signal. The multi-channel signal acquisition was realized by the optical switch,and the sound signal was denoised,restored and enhanced by the IMCRA algorithm. The experimental results show that the system can realize multi-channel scanning and picking of single-tone signals and voice signals on the sensing fiber with a length of 4 km,and can effectively improve the signal-to-noise ratio of the voice signal under complicated conditions. A new way for the application of optical fiber acoustic sensing systems is provided in harsh environments.
作者
郭茂森
王宇
张建国
刘昕
白清
王东
靳宝全
GUO Mao-sen;WANG Yu;ZHANG Jian-guo;LIU Xin;BAI Qing;WANG Dong;JIN Bao-quan(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;State Key Laboratory of Coal and CBM Co-mining,Jincheng,Shanxi 048012,China)
出处
《计量学报》
CSCD
北大核心
2019年第5期880-886,共7页
Acta Metrologica Sinica
基金
山西省应用基础研究项目(201701D221115)
山西省重点研发计划社会发展项目(201703D321037)
山西省煤层气联合研究基金资助项目(2016012011)
山西省回国留学人员科研资助项目(2016-035)
关键词
计量学
光纤声音传感系统
声音检测
多通道采集
改进最小控制递归平均算法
metrology
optical fiber acoustic sensor system
sound detection
multi-channel acquisition
improved minimum control recursive average algorithm
