Page 56 - 《应用声学）》2023年第5期
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第 42 卷 第 5 期                                                                       Vol. 42, No. 5
             2023 年 9 月                          Journal of Applied Acoustics                 September, 2023

             ⋄ 研究报告 ⋄



                         多通道超声相控阵驱动控制系统设计                                                      ∗





                                  凌子超 张艳秋 张默涵 杨久敏 菅喜岐                                  †



                                          (天津医科大学生物医学工程与技术学院           天津  300070)

                摘要：低强度经颅聚焦超声是一种利用脉冲聚焦超声调控脑神经元的治疗技术。为抑制人颅骨的非均质性和
                个体结构差异影响，须对多阵元相控阵聚焦换能器的各阵元进行参数调控实现经颅精准定位聚焦，各阵元参
                数调控需通过相位控制和驱动电路系统来实现。该文设计并搭建了一种基于直接数字式频率合成技术的多通
                道相位、幅值独立可调的相控驱动系统。实测结果表明，可实现正弦波和方波高精度相控输出，输出信号电压
                峰峰值在 0∼37.5 V 可调，相位分辨率为 0.1 ，延时误差小于 1 ns，可满足多阵元相控阵聚焦换能器驱动及其所
                                                   ◦
                需相位分辨率的需要。
                关键词：低强度聚焦超声；相控阵聚焦换能器；直接数字式频率合成技术；相位分辨率；延时误差
                中图法分类号: R318.6          文献标识码: A          文章编号: 1000-310X(2023)05-0948-06
                DOI: 10.11684/j.issn.1000-310X.2023.05.007





                      Multi-channel ultrasonic phased-array drive control system design



                       LING Zichao    ZHANG Yanqiu     ZHANG Mohan       YANG Jiumin     JIAN Xiqi


                     (Department of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin 300070, China)

                 Abstract: Low-intensity transcranial focused ultrasound is a therapeutic technique that uses pulsed focused
                 ultrasound to modulate brain neurons. In order to suppress the non-homogeneity of human skull and individual
                 structural differences, the parameters of each array of the multi-array phased-array focusing transducer must
                 be regulated to achieve precise transcranial positioning and focusing, and the parameters of each array must be
                 regulated by the phase control and drive circuit system. In this paper, we designed and built a multi-channel
                 phase and amplitude independently adjustable phase control drive system based on direct digital frequency
                 synthesis technology. The measured results show that the high-precision phase control output of sine wave and
                 square wave can be realized, the peak-to-peak output signal voltage is adjustable from 0 to 37.5 V, the phase
                 resolution is 0.1 , and the delay error is less than 1 ns, which can meet the needs of multi-array phased array
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                 focusing transducer driving and its required phase resolution.
                 Keywords: Low-intensity focused ultrasound; Phased array focusing transducer; Direct digital frequency
                 synthesizer; Phase resolution; Delay error





             2022-05-07 收稿; 2022-06-29 定稿
             天津市自然科学基金重点项目 (16JCZDJC32200)
             ∗
             作者简介: 凌子超 (1995– ), 男, 天津人, 硕士研究生, 研究方向: 超声医学。
             † 通信作者 E-mail: jianxiqi@tmu.edu.cn
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