基于超材料结构的宽频带高频光声信号定向传输模型设计  

Design of Directional Transmission Model of Wideband High-frequency Photoacoustic Signal Based on Metamaterial Structure

作　　者：任时磊 杨鹏 张重庆 韩建宁[1] 桂志国[1] REN Shi-lei;YANG Peng;ZHANG Chong-qing;HAN Jian-ning;GUI Zhi-guo(Shanxi Provincial Key Laboratory for Biomedical Imaging and Big Data,North University of China,Taiyuan 030051,China;School of Computer Science and Technology,North University of China,Taiyuan 030051,China;Dongguan Xizhe Electronics Co.,Ltd.,Dongguan 523120,China;Cancer Hospital of Shanxi Medical University,Taiyuan 030051,China)

机构地区：[1]中北大学生物医学成像与大数据山西省重点实验室,太原030051 [2]中北大学计算机科学与技术学院,太原030051 [3]东莞西喆电子有限公司,东莞523120 [4]山西医科大学附属肿瘤医院,太原030051

出　　处：《科学技术与工程》2024年第21期9053-9060,共8页Science Technology and Engineering

基　　金：山西省自然科学基金面上项目(202103021224201);山西省回国留学人员科研资助项目(2023-127);国际(地区)合作与交流项目(82120108016)。

摘　　要：为了解决高频光声信号在传输过程中存在损耗严重等问题对光声成像技术应用的限制,在声学超材料结构上设计了一种用于实现宽频带高频光声信号定向传输的模型,通过COMSOL Multiphysics软件进行了模型建立,并进行了仿真测试。测试结果表明模型对200~1000 kHz的高频声波均有良好的定向传输效果,具备良好的宽频带定向低损耗传输特性,可以很好地解决高频声波传输过程中容易产生的声能损耗问题。以700 kHz的光声信号为例,研究了光声信号在模型中的传输特性。研究表明该模型在传输高频声波的过程中,能够达到很好的局域声场增强的效果,该模型可以满足光声成像技术在应用过程中的高频信号传输的需求。In order to solve the limitation of the application of photoacoustic imaging technology due to the serious loss of high-frequency photoacoustic signal in the transmission process,a model for realizing the directional transmission of broadband high-frequency photoacoustic signal was designed on the acoustic metamaterial structure,and the model was established by COMSOL Multiphysics software,and the simulation test was carried out.The test results show that the model has good directional transmission effect for 200~1000 kHz high-frequency sound wave,has good broadband directional low loss transmission characteristics,and can well solve the problem of sound energy loss in the process of high-frequency sound wave transmission.Taking 700 kHz photoacoustic signal as an example,the transmission characteristics of photoacoustic signal in the model were studied.The research shows that the model can achieve good local sound field enhancement effect in the process of transmitting high-frequency sound waves,and the model can meet the needs of high-frequency signal transmission in the application of photoacoustic imaging technology.

关 键 词：超材料 光声成像 光声信号 宽频带 定向传输 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]