基于线阵CCD的降水粒子探测高速数据采集系统

摘要

针对线阵CCD图像扫描技术探测降水粒子的情况,设计了一种基于高速模数转换器(ADC)、先进先出缓存器(FIFO)和数字信号处处理器(DSP)的线阵CCD数据采集系统.能实现以该线阵CCD驱动时序最高频率16.6 MHz的数据采集,系统运行稳定；数据存储和处理循环进行,保证信号转换的稳定性和避免数据存储丢失；详细描述前端调理电路、数据采集系统的原理、硬件构成和逻辑控制模块,给出了数据处理算法设计和系统试验结果.%A high speed data acquisition system for precipitation detecting with linear CCD imaging technology based on ADC,FIFO and digital signal processor( DSP) was designed. The system can achieve data collection at the highest frequency of 16.6MHz with high stability. The data storage is completed al the same time when the processing cycle is proceeding. Signal conditioning circuit, data acquisition system, the hardware structure and logic control module are described in detail. The data processing algorithm and experience results are also given out.