基于电路控制的梯度折射率曲面声学透镜研究

Research on gradient index curved acoustic lens on Circuit Control

摘要:

针对现有声学透镜结构确定后功能单一的问题，提出一种利用可调谐材料实现梯度折射率曲面声学透镜的新技术。不同于以往声学透镜依靠几何阵列结构渐变的方式，该曲面声学透镜通过电路系统建立温度与材料声学折射率的映射关系，调控梯度折射率的精确分布。曲面声学透镜在不同梯度温度控制下可实现多种声学功能器件，如隐身斗篷、吕内堡透镜和鱼眼透镜等，具有调试简单，便于操作等特点。基于透镜材料声学特性可调谐和热电路温度控制技术，实现了一个功能可切换的梯度折射率曲面声学透镜器件，研究结果可为设计新型多功能声波导控制器件提供理论与技术支持。

Abstract:

In order to solve the problem of single function after the existing acoustic lens structure is determined, a new technique of gradient index curved acoustic lens based on tunable material is proposed. Different from the traditional acoustic lens which relies on geometric array structure gradient, the curved acoustic lens establishes the mapping relationship between the temperature and the material acoustic refractive index through the circuit system, and adjusts the precise distribution of the gradient refractive index. Curved-surface acoustic lens can realize many kinds of acoustic function devices under different gradient temperature control, such as stealth cloak, Lunenburg lens and fishe-eye lens, etc. It has the characteristics of simple debugging and easy operation. Based on the tunable acoustic properties of the lens material and the temperature control technology of the thermal circuit, a functional switchable gradient index curved acoustic lens device is realized. The research results can provide theoretical and technical support for the design of new multifunctional acoustic waveguide control devices.