混合数据采集与存储的实现

Design of Mixed Analog Digital Data Acquisition and Storage

摘要:

设计了一种传感器信号与GPIO口数字量隔离与采集的方案,研究了模拟信号线性光耦的隔离与电压转换技术,提出了采用光耦隔离模拟量与数字信号,利用主控芯片FPGA完成单路采样率不低于5 kHz的模拟量与数字量数据的混合编帧,使用缓冲FIFO实时完成记录仪的发送与接收,通过对数据的的回读来确保数据传输的正确性与可靠性；经大量测试表明,该方案稳定、实用,满足系统的实时性要求。

Abstract:

This paper introduces a design of analog signals and GPIO digital isolation and acquisition scheme,the research stressed the isolation of the linear optocoupler and voltage conversion technology. The analog and digital signal are isolated by optocoupler. The main control chip FPGA completed data mixed frame which contains the single channel sampling rate is not less than 5 kHz and digital data. The use of buffer FIFO is to send and receive real-time recorder. The data readed back to ensures the accuracy and reliability of data transmission .After a lot of tests,it showed that the scheme is stable、practical and meets the design requirements.