基于E类功率放大器的双频超声治疗系统研究
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摘要
目的:针对现有超声治疗仪存在的问题,设计一种基于E类功率放大器的双频超声治疗系统。方法:该系统采用E类功率放大器驱动超声换能器,通过DDS芯片AD9850实现E类功率放大器信号驱动,并采用开关电源芯片LM2576HV-ADJ实现E类功率放大器的功率调节;通过DGUS串口屏完成人机交互。运用嵌入式实时操作系统μC/OS-Ⅱ实现系统的软件设计。结果:双频超声治疗系统的性能较好,不仅可以实现输出功率调节,还可以保证输出频率和输出波形符合设计要求。结论:该系统能够实现对超声频率和超声输出波形的精确控制,为今后双频超声治疗系统的研究提供重要参考。
Objective To design a dual-frequency ultrasound therapy system based on Class E power amplifier. Methods The system developed used Class E power amplifier to drive the ultrasonic transducer, applied AD9850 DDS to signal driving of Class E power amplifier, executed power regulation of Class E power amplifier by LM2576 HV-ADJ switching power supply chip, realized man-machine interaction through DGUS serial LCD and completed software design by using μC/OS-Ⅱembedded RTOS. Results The system developed had the output power regulable, and output frequency and waveform as required. Conclusion The system can accurately control the ultrasonic frequency and ultrasonic output waveform, which provides references for futural researches on dual-frequency ultrasound therapy system. [Chinese Medical Equipment Journal,2019,40(6):16-20]
Objective To design a dual-frequency ultrasound therapy system based on Class E power amplifier. Methods The system developed used Class E power amplifier to drive the ultrasonic transducer, applied AD9850 DDS to signal driving of Class E power amplifier, executed power regulation of Class E power amplifier by LM2576 HV-ADJ switching power supply chip, realized man-machine interaction through DGUS serial LCD and completed software design by using μC/OS-Ⅱembedded RTOS. Results The system developed had the output power regulable, and output frequency and waveform as required. Conclusion The system can accurately control the ultrasonic frequency and ultrasonic output waveform, which provides references for futural researches on dual-frequency ultrasound therapy system. [Chinese Medical Equipment Journal,2019,40(6):16-20]
引文
[1]洪文学,张旭.基于变频原理的超声波治疗仪设计[J].北京生物医学工程,2006,25(2):137-140.
[2]苏满田.基于PIC单片机的双频超声波治疗仪的研制[D].哈尔滨:哈尔滨工业大学,2012.
[3]洪新华,吴慎山.超声波驱动电路的研究[J].河南职技师院学报,1999,27(3):78-80.
[4]邓思建,谭坚文,叶方伟,等.高强度聚焦超声功率源的优化设计[J].电源学报,2013(6):46-52.
[5]邓思建,谭坚文,廖瑞金,等. E类功率放大器负载变化对工作特性的影响分析[J].电工技术学报,2015,30(4):98-105.
[6]刘振宇.基于E类放大器的功率超声放大系统设计[D].哈尔滨:哈尔滨工业大学,2014.
[7]张涛,梁文林. E类功率放大器的一种优化设计方法[J].洛阳工学院学报,2000,21(1):61-64.
[8]邓思建.高强度聚焦超声功率源的电磁兼容性与优化设计研究[D].重庆:重庆医科大学,2014.
[9]潘宇倩. DDS频率合成器AD9850原理及应用[J].航天器工程,2007,16(5):85-88.
[10]张贵杰.基于STM32的医用控温毯控制系统的设计[D].大连:大连理工大学,2015.
[11]石翎熹.基于Matlab的示波器信号处理系统研究与实现[D].成都:电子科技大学,2017.
[2]苏满田.基于PIC单片机的双频超声波治疗仪的研制[D].哈尔滨:哈尔滨工业大学,2012.
[3]洪新华,吴慎山.超声波驱动电路的研究[J].河南职技师院学报,1999,27(3):78-80.
[4]邓思建,谭坚文,叶方伟,等.高强度聚焦超声功率源的优化设计[J].电源学报,2013(6):46-52.
[5]邓思建,谭坚文,廖瑞金,等. E类功率放大器负载变化对工作特性的影响分析[J].电工技术学报,2015,30(4):98-105.
[6]刘振宇.基于E类放大器的功率超声放大系统设计[D].哈尔滨:哈尔滨工业大学,2014.
[7]张涛,梁文林. E类功率放大器的一种优化设计方法[J].洛阳工学院学报,2000,21(1):61-64.
[8]邓思建.高强度聚焦超声功率源的电磁兼容性与优化设计研究[D].重庆:重庆医科大学,2014.
[9]潘宇倩. DDS频率合成器AD9850原理及应用[J].航天器工程,2007,16(5):85-88.
[10]张贵杰.基于STM32的医用控温毯控制系统的设计[D].大连:大连理工大学,2015.
[11]石翎熹.基于Matlab的示波器信号处理系统研究与实现[D].成都:电子科技大学,2017.