摘要
为了满足声呐信号处理中对多通道信号滤波及增益可调、同步采集、数据快速传输、数据可存储和实时分析的应用需求,设计了多通道采集系统包括多通道采集器和上位机控制界面。该采集器采用高性能现场可编程逻辑门阵列(FPGA)作为主控芯片,使用两颗高精度模数转换器(ADC)AD7768,并结合上位机控制下位机进行数据采集和处理,实现16通道并行数据采集、SD卡数据存储和上位机利用小波变换对接收到的数据进行去噪和时频分析等功能。以实际的水池进行声呐采集试验,该系统采样率可通过上位机配置进行切换,同步性能优于25 ns,数据存储速率为8.2 MB/s,实时性优于1.17 ms,能够满足海底复杂环境下信号特征数据处理的需求。
In order to meet the application requirements of multi⁃channel signal filtering and gain adj⁃ustment,synchronous acquisition,fast data transmission,data storage and real⁃time analysis in sonar signal processing,a multi⁃channel acquisition system including multi⁃channel collector and host computer control interface is designed.The collector uses high performance Field Programmable logic Gate Array(FPGA)as the main control chip,uses two high precision analog⁃to⁃digital converters(AD7768),and combines the upper computer to control the lower computer for data acquisition and processing.It realizes 16 channels parallel data acquisition,SD card data storage,and the upper computer uses wavelet transform to perform denoising and time⁃frequency analysis of the received data.The sampling rate of the system can be switched through the configuration of the host computer,the synchronization performance is better than 25 ns,the data storage rate is 8.2 MB/s,and the real⁃time performance is better than 1.17 ms,which can meet the demand of signal characteristic data processing in the complex seabed environment.
作者
刘凯
齐华
LIU Kai;QI Hua(School of Electronic And Information Engineering,Xi’an Technological University,Xi’an 710021,China)
出处
《电子设计工程》
2024年第6期1-5,共5页
Electronic Design Engineering
基金
国家自然科学基金项目(62001392)。
