光纤-Mie共振结构复合弱声场增强感知与探测技术

声学目标定位技术在军事防御、医疗辅助、工业诊断等领域都发挥着重要作用。为了解决传统声学目标定位系统弱信号拾取能力差、系统结构复杂、抗电磁干扰能力弱等问题，本项目拟利用光纤传感器抗电磁干扰、结构紧凑优势与声学Mie共振结构声场放大特点，开展基于声学Mie共振结构的光纤复合型声感测系统理论和应用研究。本项目将从理论和实验两方面系统研究局域偶极子、四极子Mie共振模式下的声学超构材料声波调控机理，解决待测信号在声放大后的相位一致性问题，结合纤细光纤声学传感器，重点研究声学Mie共振结构与光纤声学传感器的声耦合机制，根据Mie共振结构超构材料声波响应频段设计新型光纤声学传感器，研发传感器制备方法，搭建声学Mie共振结构光纤复合型声感测系统，建立基于时延估计法的定位阵列，实现弱信号声学目标探测和精确定位。通过本项目的研究，构建声-光复合型声感测系统，为高效声学目标测量与定位提供一种更优化的解决方案。

Acoustic target positioning technology plays a very important role in military defense, medical assistance, industrial diagnosis, and such other fields. To solve the problems including poor signal pickup capacity, complex system structure, and weak anti-electromagnetic interference ability of traditional acoustic target positioning system, this project intends to develop the research on both theoretical modeling and applications of the acoustic Mie resonance structure based fiber optic acoustic sensing system by using the anti-electromagnetic interference compactly fiber optic sensor and acoustic amplification characteristic of Mie resonance structure. This project will systematically study the sound wave control mechanism of acoustic metamaterials in the local dipole and quadrupole Mie resonance modes from both theoretical and experimental perspectives and solve the problem of phase consistency of the amplificated acoustic signal. The project will focus on the study of the acoustic coupling mechanism between the acoustic Mie resonance structure and the optical fiber acoustic sensor. We will design novel optical fiber acoustic sensors according to the acoustic wave response frequency band of the Mie resonance structure metamaterial and develop new sensor production methods. Finally, we will build an acoustic MIE resonance structure-fiber optic composite acoustic sensing system and a positioning array based on time delay estimation method for weak acoustic signal target detection and positioning. This research will establish an acoustic-optical composite acoustic sensing system based on the acoustic Mie resonance structure and optical fiber sensor and provide a more efficient solution for acoustic target measurement and positioning.