微电容超声换能器阵列的信号采集电路与应用  

Signal Acquisition Circuit and Application of CMUT Array

作　　者：郭明[1,2] 何常德[1,2] 郑永秋[1,2] 张文栋[1,2] GUO Ming HE Chang-de ZHENG Yong-qiu ZHANG Wen-dong(Key Laboratory of Instrumentation Science ＆ Dynamic Measurement, Ministry of Education, North University of China. Taiyuan 030051, China School of Instrument and Electronics ,North University of China, Taiyuan 030051, China)

机构地区：[1]中北大学,仪器科学与动态测试教育部重点实验室,山西太原030051 [2]中北大学仪器与电子学院,山西太原030051

出　　处：《仪表技术与传感器》2016年第12期73-75,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61127008);国家杰出青年基金项目(61525107)

摘　　要：设计了一种基于微电容超声换能器(CMUT)16阵列的信号采集系统,用大容量FLASH做临时存储介质,利用USB总线传输能力上传采集数据。实验表明:该采集系统具有通道一致性好、采样精度高的特点,以6 MHz的采样率同步采集到16通道400 k Hz超声信号。开展了水下超声测距和超声成像等应用研究,对采集数据进行线性标度转换和带通滤波等预处理,为微电容超声换能器的应用提供硬件支持。This paper designed a signal acquisition system based on capacitive micromachined uhrasonic transducer16 arrays,adopted large capacity FLASH as storage medium,and rationally used the data transmission ability of USB2.0 to upload data.Experiments demonstrated that this acquisition system has characteristics of high sampling precision,good channel consistencry.It acquired 16 channel 400 kHz signal with 6 MHz sampling rate synchronously and successfully.Underwater ultrasonic ranging and ultrasound imaging researches was carried out,preprocess data such as linear scaling transformation and band-pass filtering, laids a hardware foundation for the application of capacitive micromachined ultrasonic transducer.

关 键 词：微电容超声换能器 同步采集 数据预处理 超声测距 超声成像 

分 类 号：TB552[理学—物理]