A compact time reversal emitter-receiver based on a leaky random cavity

作者：Luong Trung Dung; Hies Thomas; Ohl Claus Dieter^*

来源：Scientific Reports, 2016, 6(1): 36096.

DOI：10.1038/srep36096

Time reversal acoustics (TRA) has gained widespread applications for communication and measurements. In general, a scattering medium in combination with multiple transducers is needed to achieve a sufficiently large acoustical aperture. In this paper, we report an implementation for a cost-effective and compact time reversal emitter-receiver driven by a single piezoelectric element. It is based on a leaky cavity with random 3-dimensional printed surfaces. The random surfaces greatly increase the spatio-temporal focusing quality as compared to flat surfaces and allow the focus of an acoustic beam to be steered over an angle of 41 degrees. We also demonstrate its potential use as a scanner by embedding a receiver to detect an object from its backscatter without moving the TRA emitter.

• 出版日期2016-11-4
• 单位南阳理工学院