基于DDS的家用超声治疗仪设计  

Design of Household Ultrasonic Therapeutic Apparatus Based on DDS

作　　者：王志成[1] 庞宇[1] 林金朝[1] 蒋伟[1] 郑广发 WANG Zhicheng;PANG Yu;LIN Jinzhao;JIANG Wei;ZHENG Guangfa(Chongqing Key Laboratory of Optoelectronic Information Sensing and Transmission Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

机构地区：[1]重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆400065

出　　处：《压电与声光》2021年第2期170-173,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(61671091)。

摘　　要：针对家用超声治疗仪存在谐振频率易漂移及精度低等问题,该文提出了一种将模糊控制器、比例、积分、微分(PID)控制器和锁相环技术结合的复合跟踪策略。通过直接数字式频率合成(DDS)技术结合STM32L151产生超声信号,利用T型网络进行阻抗匹配,对超声治疗仪性能进行测试。实验结果表明,该治疗仪声-电转换效率高,输出的超声波具有精度高,不易失谐等优点。In order to solve the problems of easy drift of resonance frequency and low precision in the household ultrasonic therapeutic apparatus,a composite tracking strategy that combines fuzzy controller,proportional,integral,derivative(PID)controller and phase-locked loop technology is proposed in this paper.The ultrasonic signal is generated by direct digital frequency synthesis(DDS)technology combined with STM32l151,and a T-shaped network is used for impedance matching to test the performance of ultrasonic therapeutic apparatus.The experimental results show that the therapeutic apparatus has the advantages of high acoustic-electric conversion efficiency,high accuracy of the output ultrasound wave and not easy to detune.

关 键 词：超声电源 直接数字式频率合成 阻抗匹配 锁相环 频率跟踪 模糊控制 

分 类 号：TN318.6[电子电信—物理电子学]