基于1-3压电复合材料的相控聚焦系统
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摘要
针对相控聚焦超声系统控制电路复杂、移相精度低,锆钛酸铅(PZT)材料制备的换能器转换效率较低的问题。控制电路采用Verilog HDL语言将通信、倍频锁相、信号发生及信号移相功能集成在现场可编程门阵列(FPGA)中。换能器采用1-3型压电复合材料制作。实验结果显示,该相控聚焦系统提高了电路集成度与移相精度及换能器的电声转换效率。
Aiming at the complexity of the control circuitry,low phase shift accuracy and the low conversion efficiency of transducer for phased focused ultrasound system,we integrate communications,frequency lock,signal generation,signal phase shift function in a FPGA chip by Verilog HDL language.The transducer is fabricated with 1-3piezoelectric composites.The experimental results show that the phased focused system improves the circuit integration,phase shift accuracy of circuit and electro-acoustic conversion efficiency of transducer.
Aiming at the complexity of the control circuitry,low phase shift accuracy and the low conversion efficiency of transducer for phased focused ultrasound system,we integrate communications,frequency lock,signal generation,signal phase shift function in a FPGA chip by Verilog HDL language.The transducer is fabricated with 1-3piezoelectric composites.The experimental results show that the phased focused system improves the circuit integration,phase shift accuracy of circuit and electro-acoustic conversion efficiency of transducer.
引文
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[9]邱明波,李乔亮,陈昕,等.超声弹性成像声辐射力激励模块设计[J].中国医疗器械杂志,2013,37(5):322-326.
[10]周文征,王意喆,张千,等.64阵元高强度聚焦超声相控换能器的仿真研究[J].压电与声光,2014,36(3):424-427.ZHOU Wenzheng,WANG Yizhe,ZHANG Qian,et al.Simulatio study on an 64-element phased array for high intensity focused ultrasound[J].Piezoelectrics&Acoustooptics,2014,36(3):424-427.
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[2]王平,高阳,范文政,等.一种基于相对声程差的高精度逐点聚焦实现方法[J].声学学报,2012,37(5):508-515.
[3]刘文杰,沈国峰,吴昊,等.基于FPGA技术的P-HIFU系统相控信号发生器的研制[J].中国医疗器械杂志,2012,36(1):1-3.
[4]史兴,刘丽佳,余龙江.一种基于FPGA的数字超声电子聚焦系统的设计[J].计算机与数字工程,2006,33(12):132-135.
[5]鲜晓军,林书玉,王登攀,等.基于1-3-2型压电复合宽频带水声换能器研究[J].压电与声光,2014,36(4):491-493.XIAN Xiaojun,LIN Shuyu,WANG Dengpan,et al.Study of broad-band underwater transducers based on1-3-2 piezocomposite material[J].Piezoelectrics&Acoustooptics,2014,36(4):491-493.
[6]汤旭东,曾德平,杨增涛,等.基于1-3压电复合材料的透镜式聚焦换能器设计[J].压电与声光,2013,35(4):545-548.TANG Xudong,ZENG Deping,YANG Zengtao,et al.Designing of a lens-focused transducer using 1-3piezoelectric composites[J].Piezoelectrics&Acoustooptics,2013,35(4):545-548.
[7]殷帅峰,何富连.基于相控延时原理的综放设备超声无损检测技术[J].煤矿安全,2013,44(7):91-94.
[8]马锐锋,沈国峰,乔杉,等.MRI引导的相控型HIFU系统框架设计与软件开发[J].中国医疗器械杂志,2013,2(5):96-99.
[9]邱明波,李乔亮,陈昕,等.超声弹性成像声辐射力激励模块设计[J].中国医疗器械杂志,2013,37(5):322-326.
[10]周文征,王意喆,张千,等.64阵元高强度聚焦超声相控换能器的仿真研究[J].压电与声光,2014,36(3):424-427.ZHOU Wenzheng,WANG Yizhe,ZHANG Qian,et al.Simulatio study on an 64-element phased array for high intensity focused ultrasound[J].Piezoelectrics&Acoustooptics,2014,36(3):424-427.
[11]HUANG G L,CHUNG H Y,LIU H L.A transmit/receive 256-channel ultrasound phased array driving system design and strategy for transrib thermal therapy[C]//S.l.:Ultrasonics Symposium(IUS),2011IEEE International,2011:494-497.