[1]刘姝言,王青东,李禹志,等.相控超声激发系统的设计[J].南京师范大学学报(工程技术版),2016,16(04):008.[doi:10.3969/j.issn.1672-1292.2016.04.002]
　Liu Shuyan,Wang Qingdong,Li Yuzhi,et al.Design of Phase Controlled Ultrasound Excitation System[J].Journal of Nanjing Normal University(Engineering and Technology),2016,16(04):008.[doi:10.3969/j.issn.1672-1292.2016.04.002]
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相控超声激发系统的设计
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南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
16卷
期数:
2016年04期
页码:
008
栏目:
电气与电子工程
出版日期:
2016-12-31

文章信息/Info

Title:
Design of Phase Controlled Ultrasound Excitation System
文章编号:
1672-1292(2016)04-0008-07
作者:
刘姝言; 王青东; 李禹志; 郭各朴; 马青玉
南京师范大学物理科学与技术学院,江苏 南京 210023
Author(s):
Liu Shuyan; Wang Qingdong; Li Yuzhi; Guo Gepu; Ma Qingyu
School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China
关键词:
相控超声; FPGA; MD2134; 窄带滤波谐振
Keywords:
phase controlled ultrasound; FPGA; MD2134; narrow-band resonant filter
分类号:
X87
DOI:
10.3969/j.issn.1672-1292.2016.04.002
文献标志码:
A
摘要:
针对相控阵列声涡旋中的多路相控信号的激发问题,选用波形存储和窄带滤波谐振相结合的信号发生芯片MD2134实现信号的输出和功率放大,并利用FPGA编程技术控制输出信号的相位,设计了一个相位可调的8路相控超声激发系统,达到高集成度、操控灵活、相位差可控的目标. 在设计中,用Quartus Ⅱ软件编写寄存器代码,控制信号发生电路输出带有相位差的信号,经过D/A转换和功率放大后驱动换能器形成谐振. 将同步输出的8路中心频率约为500 kHz,相位差为π/4的信号分别激励8个换能器,用示波器采集水听器所接收到的声波波形,并测量各路声波的相位差. 结果表明设计系统的集成度高,输出信号幅度和相位稳定,各路声波相位差和理论结果一致,可在相控超声系统中推广和应用.
Abstract:
In order to realize the excitation of phased array in acoustic vortex,a phased ultrasonic excitation system is designed in this paper. Controlled by a FPGA,the chip MD2134 is employed to generate phased signal by using the techniques of waveform storage and narrow-band resonant filter with high integration degree,flexible operation and controllable phase difference. The control codes of chip registers are written by Quartus Ⅱ to generate signals with the controllable phase difference. After D/A conversion and power amplification,the output signals are used to drive the transducer effectively,to generate electrical resonance to drive acoustic waveforms. 8-channel synchronous signals at the frequency of 500 kHz with the phase difference of π/4 are used to drive 8 transducers. The corresponding acoustic signals are detected by a needle hydrophone and collected by an oscilloscope to conduct waveform comparison. The consistent phase differences of the experimental results demonstrate that the designed system is highly integrated with stable amplitudes and phases of the generated acoustic signals,and that the system can be applied in phase controlled ultrasonic system.

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备注/Memo

备注/Memo:
收稿日期:2016-09-03.
基金项目:国家自然科学基金(11274176、11474166、11604156)、江苏省自然科学基金(BK20161013)、中国博士后科学基金(2016M591874)、江苏高校优势学科建设项目.
通讯联系人:马青玉,博士,教授,博士生导师,研究方向:电子技术、信息处理、声学. E-mail:maqingyu@njnu.edu.cn
更新日期/Last Update: 2016-12-31