基于USB2．0接口在线变速调焦应用系统的设计  

Design of on-Line Adjusting Focus Application System with Altered Speed Based on USB Interface

作　　者：高世杰[1] 竺晓山[1] 吴志勇[1] 陈涛[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《计算机测量与控制》2006年第4期521-523,共3页Computer Measurement &Control

基　　金：吉林省科技厅自然科学基金(20030535)中科院二期创新项目(C04708Z)

摘　　要：与传统的摄影调焦系统相比较,针对焦距可以在线调整的要求,提出了基于USB接口的可在线变速调焦应用系统的设计方案,利用USB2．0接口芯片为数据传输核心,通过主机端应用程序设置调焦曲线,实现了变速调焦的功能,实验结果表明,该系统调焦曲线与理想曲线拟合度较好,拍摄已知运动轨迹的目标,达到了满意效果。Some traditional adjusting focus photography systems are compared. According to the requirement of adjusting focus on--llne, a scheme of adjusting focus with altered speed system is presented. Using USB2. 0 interface chip as main transmission unit, the focus can be adjusted by controlling the application program, and the function of adjusting focus can be accomplished. Finally the result given by experiment shows that the curve of adjusting focus is fit well with the ideal one. Shooting the goal of the known movement orbit has reached the satisfactory result.

关 键 词：通用串行总线 固件 通用可编程接口 步进电机控制器 异步先入先出存储器 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]