激光信号采集的FPGA控制  

Laser Signal Capture Control Based on FPGA

作　　者：李正东[1] 顾静良[1] 刘志强[1] 吴剑涛[1] 

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900

出　　处：《激光与红外》2008年第2期181-185,共5页Laser & Infrared

摘　　要：针对激光信号采集的要求,提供了一个典型的工作原理框图,并对其中数据采集和传输中关键模块的设计作了详细的描述,其中D/A转换模块负责在对激光信号探测前,完成对探测器前置放大器的调零,A/D采集模块负责对激光信号的数据采集和数据转换,并通过串口将打包后的数据上传到上位机,串口模块则负责接受来自上位机的指令和对采集信号数据的上传。实验结果表明:能够正确接受上位机指令,实现前置放大器的调零和对采集过程的控制,并将这些数据通过以速度为115200bit/s的串口形式上传给上位机,得到了200 f/s的上传速度。In order to finish laser signal capture, a typical development system block diagram is provided. Its signal capture and data transfer subsystem is described in detail, some important modules design and state machine shift are presented. D/A module finishes pre-amplifier adjusting-zero before capturing laser signal. A/D module controls laser signal capturing-data timing, and send capture data packets to the computer by serial port. Serial port module is used to receive instruction from computer and sends data to computer. Experimental results indicate that this design can satisfy the system requirements of realizing pre-amplifier adjusting-zero,transfers data to computer by serial port at the speed of 115200bit/s, and accomplishes 200 frame data per second.

关 键 词：激光 A/D采集 D/A转换 FPGA 串口 

分 类 号：TN248.4[电子电信—物理电子学]