CAJ | 학술논문

传统的回波模拟数据采集系统通过模拟信号预处理机进行放大、滤除噪声，接收信号的幅度经过放大后就会出现过大或过小的情况。提出一种基于MAX3491DSP芯片的宽频带回波模拟数据采集器设计方法。基于MAX3491进行硬件电路设计，并对数据采集过程中的干扰滤波算法进行优化设计，设计了预处理机放大器、运算放大器、模拟预处理机。设计无源高通滤波器有效地消除直流偏置，抑制高频成分，采用串并联复合式宽带阻抗匹配网络控制方法，对滤波算法进行改进。实验结果表明，采用该系统进行宽频带回波数据采集，能准确发现目标回波亮点，在不同速度下具有多目标应答性能，解决宽频带信号超外差干扰影响，提高数据采集精度。
전통적회파모의수거채집계통통과모의신호예처리궤진행방대、려제조성，접수신호적폭도경과방대후취회출현과대혹과소적정황。제출일충기우MAX3491DSP심편적관빈대회파모의수거채집기설계방법。기우MAX3491진행경건전로설계，병대수거채집과정중적간우려파산법진행우화설계，설계료예처리궤방대기、운산방대기、모의예처리궤。설계무원고통려파기유효지소제직류편치，억제고빈성분，채용천병련복합식관대조항필배망락공제방법，대려파산법진행개진。실험결과표명，채용해계통진행관빈대회파수거채집，능준학발현목표회파량점，재불동속도하구유다목표응답성능，해결관빈대신호초외차간우영향，제고수거채집정도。
The traditional echo simulation data acquisition system uses analogue signal preprocessor for amplification and filter, the received signals after amplification will appear too large or small. A broadband echo simulation data acquisition design method is proposed based on MAX3491DSP chip. The hardware circuit is designed based on MAX3491, and the in?terference filter algorithm of the data collection process is optimized, the pre processor amplifiers, operational amplifier, an?alog pre processor are designed. The passive high pass filter is designed for eliminating the DC bias, the high frequency component is suppressed, and the series parallel hybrid broadband impedance matching network control method is used to improve the filtering algorithm. The experimental results show that it can accurately detect target echo highlight, response performance is better with multiple targets at different speeds, solve the broadband signal heterodyne interference, the accu?racy of data acquisition is improved.