基于FPGA控制驱动振镜扫描与数据采集设计  

Design of FPGA control driven galvanometer scanning and data acquisition

作　　者：谢凯[1] 李晖[1] 李志芳[1] 唐嘉铭 

机构地区：[1]福建师范大学光电与信息工程学院医学光电科学与技术教育部重点实验室福建省光子技术重点实验室,福州350007

出　　处：《电子测量技术》2016年第4期123-128,共6页Electronic Measurement Technology

摘　　要：本文旨在设计通过FPGA控制振镜作周期性偏转,实现激光线性扫描,系统数据采集部分则通过数据采集卡代替数字示波器来采集光声信号。基于VC开发的数据采集卡可以灵活控制对光声信号进行数据采集,系统时序由FPGA控制。实验证明了振镜偏转扫描可以实现和数据采集卡的可行性,该方案能有效改善实验室现有光声成像系统只能通过步进电机手动调节实现线性扫描,能按照自身需求来采集有用的光声信号,配合后期制作的声透镜为实现一体化光声成像系统提供依据。The design in this paper aims to make periodical deflection with FPGA controlling galvanometer to achieve laser linear scanning,and to replace digital oscilloscope with data acquisition card to collect photoacoustic signals.DAQ card based on VC has flexible control of the data acquisition of the photoacoustic signal,the system timing is under the control of FPGA.The experiment has proved the feasibility of deflected scanning of galvanometer and the data acquisition card.This scheme can efficiently improve the current situation that the existing photoacoustic imaging systems in labs can only achieve linear scanning with manual adjustment of stepping motor,it is able to collect the available photoacoustic signal in the light of its own demands,and it also provides basis for the implementation of integrated photoacoustic imaging system combined with the acoustical lens in post production.

关 键 词：振镜 数据采集卡 声透镜 光声成像系统 

分 类 号：TN249[电子电信—物理电子学]