基于AD7705及FPGA的光信号采集系统设计

Design of optical signal acquisition system based on AD7705 and FPGA

光电检测与数据转换是光纤光栅测温系统中的重要组成部分,为提高测量精度和稳定性,提出了以16位模数转换器AD7705为核心的光信号采集系统.阐述了FPGA控制模块的设计思路及VHDL实现方法,并以FPGA作为控制器实现AD7705逻辑控制.通过Quartus II软件进行仿真测试,结果显示:设计符合要求,系统稳定可靠.

Photoelectric detection and data conversion is an important part of the optical fiber grating temperature measurement system.In order to improve the system measurement precision and stability,the optical signal acquisition system based on the core of analog to digital converter AD7705 was proposed,the design ideas of VHDL and the implementation of the control module FPGA were described,and uses FPGA as the controller to realize the AD7705 logic control.The system is stable,and met design requirements,through the simulate on test by QuartuslI software.