基于FPGA的多通道异步时分数据采集电路研究

Research of multi-channel FPGA-based asynchronous time-division data acquisition circuit

为了对飞行体多通道信号进行实时参数采集,提出了异步时分数据采集电路的设计方法,同时对多通道异步时分数据采集电路中的通道串扰现象进行了深入研究,提出了控制逻辑的优化方法,以及关键器件选型的依据。通过现场试验,该采集电路成功采集了飞行体的实时工作参数。工程实践表明,该系统实现了对多通道模拟信号的高精度采集,满足了工程实际需求。

In order to achieve multi-channel real-time analog signal acquisition of flying bodies, a design method for asynchronous time-division data acquisition circuit is presented in this paper. The channel crosstalk phenomenon in circuit is studied deeply, and the optimization method for logic control and the selection basis of key components are given. The practical test results show that the acquisition circuit can collect the real-time operating parameters of the flights with high acquisition accuracy and meet the requirements of practical engineering.