基于光散射技术的微光信号采集系统

Design of Weak Optical Signal Acquisition System Based on Light Scattering Technical

针对微弱光对外部环境敏感度高,影响采集数据精度的问题,提出一种基于FPGA的数据采集系统的方案。以EP3C5E144C8芯片为主控单元,配合模数转换芯片AD7934,实现了对微弱光信号的采集,保证了数据采样精度和数据处理的速度。计算机显示界面程序采用图形化编程软件LabVIEW编写,用户显示界面信息丰富而且美观。实验表明,该数据采集系统具有结构简单、数据读取方便、人机界面友好等特点,具有很大应用价值。

For the feeble light of the external environment is highly sensitive,affect the accuracy of data collection,a data acquisition system solutions based on field programmable gate array（ FPGA） was proposed in this paper. With Cyclone III series EP3 C5 E144 C8 chip as the main control unit,with the Analog-to-digital（ A/D） converter chip AD7934,the weak optical signal acquisition was realized,ensuring the accuracy of data sampling and data processing speed. Computer display interface program was written by NI＇s LabVIEW graphical programming software,the user interface display information rich and beautiful. The experimental results show that the data acquisition system has simple structure,data easy to read,friendly interface and other features,and has great application value.