相控阵聚焦超声控制系统的设计  

Design of Phased Array Focused Ultrasound Control System

作　　者：王欢[1] 张清[2] 周红生[1] 潘海林[2] 刘逍逸[1] WANG Huan;ZHANG Qing;ZHOU Hongsheng;PAN Hailin;LIU Xiaoyi(Shanghai Acoustics Laboratory, Chinese Academy of Science, Shanghai 201815, China;National Trusted Embedded Software Engineering Technology Research Center, Software Engineering Institute, East China Normal University, Shanghai 200062, China)

机构地区：[1]中国科学院声学研究所东海研究站,上海201815 [2]华东师范大学软件工程学院国家可信嵌入式软件工程技术研究中心,上海200062

出　　处：《压电与声光》2020年第6期735-738,共4页Piezoelectrics & Acoustooptics

基　　金：中国科学院声学研究所“青年英才计划”基金资助项目(QNYC201828)。

摘　　要：低强度聚焦超声治疗技术是当前超声治疗领域的研究热点,应用场景不同对于超声系统的参数和性能要求也具有差异化,相控阵技术的引入为解决聚焦声场精确控制带来了新的思路。现有相控阵聚焦超声控制系统的输出参数相对固定,频率和功率可调范围窄,且支持换能器阵列通道的规模较小。该文设计了一种基于现场可编程逻辑门阵列(FPGA)的256通道的相控阵超声控制系统。实验结果表明,该系统实现频率1~3 MHz可调,输出电压峰-峰值±100 V连续可调,相位延时精度为5 ns,可驱动不同阵元数的相控阵探头,从而为超声治疗技术的研究提供多元化激励实施方案。The low intensity focused ultrasound treatment technology is a research hotspot in the field of ultrasound treatment.Different application scenarios have different requirements for parameters and performance of the ultrasound system,while the introduction of phased array technology brings new ideas to solve the problem of accurate control of the focused sound field.The output parameters of the existing phased array focused ultrasound control system are relatively fixed,the adjustable range of frequency and power is narrow,and the scale of supporting the transducer array channel is small.This paper presents a 256 channels phased array ultrasound control system based on FPGA.The experimental results show that the frequency of the system can be adjusted from 1 MHz to 3 MHz,the peak to peak value of the voltage is continuously adjustable within±100 V,and the control precision of phase controlled delay is 5 ns.It can drive phased array probes with different array elements,so as to provide diversified incentive schemes for the research of ultrasonic therapy technology.

关 键 词：256通道 低强度聚焦超声 超声控制系统 相控阵 超声治疗 

分 类 号：TN384[电子电信—物理电子学]