弹光调制傅里叶变换光谱仪中数据通信  

Data communication in photo-elastic modulation Fourier transform spectrometer

作　　者：李珊[1] 陈媛媛[1] 王志斌[1] 张敏娟[1] 王丽[1] 谭绪祥 李克武[1] 

机构地区：[1]中北大学山西省光电信息与仪器工程技术研究中心,山西太原030051

出　　处：《计算机工程与设计》2016年第10期2821-2825,共5页Computer Engineering and Design

基　　金：国家自然科学基金青年科学基金项目(61505180);山西省青年科技研究基金项目(2015021084;2014021012)

摘　　要：在弹光调制傅里叶变换光谱仪(PEM-FTS)中,为满足实时干涉信号的高速采集与处理的要求,提出基于FPGA+DSP的硬件平台实现方案。使用32位浮点型DSP芯片TMS320C6713的外部存储器接口(EMIF)与FPGA连接,利用DSP的中断、片选及读写使能信号作为判断位与使能位,在FPGA端编写状态机来完成两者之间的多路数据传输。在硬件DSP上采用非均匀快速傅里叶变换算法(NUFFT)完成数据的实时处理,对被测激光进行光谱反演。实验结果表明,该方法可以实现FPGA与DSP之间的数据通信,NUFFT算法能快速准确地反演出干涉信号的光谱信息。To meet the requirements of high speed data acquisition and processing of real-time interference signal in photo-elastic modulation Fourier transform spectrometer（PEM-FTS）,based on FPGA＋DSP,the hardware platform implementation was proposed.32floating-point TMS320C6713 DSP chip external memory interface（EMIF）was connected to FPGA,using interruption,chip enable and write enable signal of DSP chip as judgement bit and enable bit,and the state machine was programmed in the FPGA end to complete the multi-channel data transmission between FPGA and DSP.Non-uniform fast Fourier transform algorithm（NUFFT）was adopted to complete real-time data processing and to solve spectral inversion of measured laser in hardware DSP chip.Experimental results show that this method can achieve data communication between FPGA and DSP,and NUFFT algorithm can quickly and accurately restore interference signal spectral information.

关 键 词：弹光调制 数字信号处理器 外部存储器接口 现场可编程门阵列 状态机 非均匀快速傅里叶变换 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]