基于FPGA的电容式声压传感器阵列信号采集存储系统

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英文篇名：Signals Acquisition and Storage System of Capacitive Hydrophone Array Based on FPGA 作者：沈倪鑫 ; 王任鑫 ; 张国军 ; 杨晟辉 ; 张文栋 英文作者：SHEN Ni-xin;WANG Ren-xin;ZHANG Guo-jun;YANG Sheng-hui;ZHANG Wen-dong;North University of China,Science and Technology on Electronic Test & Measurement Laboratory,Ministry of Education; 关键词：FPGA ; 电容式传感器 ; 传感器阵列 ; 跨阻放大器 ; 信号采集 ; A/D转换 英文关键词：FPGA;;capacitive hydrophone;;sensor array;;trans-impedance amplifier;;signal acquisition;;A/D conversion 中文刊名：YBJS 英文刊名：Instrument Technique and Sensor 机构：中北大学仪器科学与动态测试教育部重点实验室; 出版日期：2019-03-15 出版单位：仪表技术与传感器 年：2019 期：No.434 语种：中文; 页：YBJS201903021 页数：5 CN：03 ISSN：21-1154/TH 分类号：101-104+109

摘要

针对水下声信号探测和电容式声压传感器阵列工程应用的需求,设计了一种应用于该传感器阵列的信号采集存储系统。该系统解决了实际应用中电容式声压传感器阵列输出信号无法直接检测、电容变化-电压变化转换精度低等问题。该系统以FPGA为控制核心实现该传感器阵列不同阵元的电路匹配,同时完成信号的预处理、采集及存储。系统测试过程中,采集并存储电容式声压传感器输出信号,并通过上位机对存储信号进行读取,测试结果表明:该系统在水下工作稳定,可正确记录水声信号。
        According to the requirements for detecting underwater signals by capacitive hydrophone array in application,a kind of signal acquisition and storage system was designed.This system solved the problems that the output signals of capacitive hydrophone array can not be directly detected in practical application and the conversion precision of capacitance change to voltage change was low.This system took FPGA as a key component,was used to realize the circuit matching of different array elements,signal processing,acquisitionand storage,which were collected by capacitive hydrophone array.During the process of system debugging,signals of capacitive hydrophone array were collected and stored.By reading the storage signals through upper monitor,the result shows that this system works stably in underwater environment and is able to record underwater acoustic signals correctly.

引文

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