基于EFPI光纤传感器的仿生耦合相位差放大  

Bionic-coupled Phase Difference Amplification based on EFPI Fiber Sensor

作　　者：刘彬 董喜来[1] 褚兴华 钟志 单明广[1] LIU Bin;DONG Xilai;CHU Xinghua;ZHONG Zhi;SHAN Mingguang(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Advanced Marine Communication and Information Technology Ministry of Industry and Information Technology,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]哈尔滨工程大学先进船舶通信与信息技术工信部重点实验室,哈尔滨150001

出　　处：《实验室研究与探索》2022年第8期27-30,76,共5页Research and Exploration In Laboratory

基　　金：国家青年自然科学基金项目(52001096);中央高校基础科研业务费项目(3072021CFT0803);2021年教育部第二批产学合作协同育人项目(202102172017);哈尔滨工程大学研究生“课程思政”示范课项目(YJSKCSZ202007)。

摘　　要：针对传统声测向阵传感器在恶劣环境和小尺寸条件下工作不稳定和失效的问题,提出了一种基于EFPI(Extrinsic Fabry-Perot Interferometer)光纤传感器的仿生耦合相位差放大技术。首先通过制作的双F-P腔光纤传感器实现对声音信号的动态解调,F-P腔设计时,不需要考虑初始腔长差对解调结果的影响;实验过程中测量的声音信号为5 kHz,解调后的功率谱与声音信号频率一致;然后在传统阵列测向的基础上,引入奥米亚棕蝇听觉耦合机制。实验过程中改变声波入射角度(由0°变为30°),两路信号的相位差被显著放大;耦合后的信号时延相较于原始信号可以放大到15倍,进而提高时延对波达方向角的灵敏度。Aiming at the instability and failure of traditional acoustic direction finding array sensors in harsh environment and small-size conditions,a bionic coupling phase difference amplification technology based on EFPI(extrinsic Fabry-Perot interferometer)optical fiber sensor is proposed to improve the direction finding accuracy of sound sources in small-size conditions.Firstly,the dynamic demodulation of acoustic signal is realized by making a double F-P cavity optical fiber sensor.In designing the F-P cavity,the influence of the initial cavity length difference on the demodulation result does not need to be considered.The sound signal measured during the experiment is 5 kHz,and the demodulated power spectrum is consistent with the sound signal frequency.Then,based on the traditional array direction finding,the aural coupling mechanism of Ormia ochracea is introduced.During the experiment,the phase difference of the two signals is significantly amplified by changing the incident angle of the sound wave(from 0°to 30°),and the coupled signal delay can be amplified to 15 times compared with the original signal,so as to improve the sensitivity of the time delay to the direction of arrival.

关 键 词：声测向 仿生耦合 相位差放大 非本征法布里-珀罗干涉仪 

分 类 号：O433.1[机械工程—光学工程]