基于数字信号处理技术的连续变焦镜头控制系统设计  

Design of Zoom Lens System Based on Digital Signal Processing

作　　者：李零印[1,2] 王一凡[1] 薛育[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,长春130033 [2]中国科学院研究生院,北京100049

出　　处：《光子学报》2011年第9期1346-1350,共5页Acta Photonica Sinica

基　　金：国家高技术研究发展计划(No.2008AA0049)资助

摘　　要：针对以往连续变焦镜头控制系统存在的速度响应慢、准确度低等缺点,对连续变焦镜头及其控制系统的设计方法进行改进.采用机械补偿的变焦距镜头理论,确定变焦距系统位移曲线.基于数字信号处理技术和步进电机的控制技术,设计了包括数字信号处理器、步进电机、步进电机驱动器、键盘控制、计算机通信、液晶显示模块为一体的控制系统,同时对变焦距系统增加了自锁模块,提高了控制系统的安全性与可靠性.初步实验结果表明,控制系统准确度在0.01mm以内,满足0.12mm的设计指标.Aiming at slow response speed and low accuracy of traditional continuous zoom lens control system, the design method of continuous zoom lens and its control system was improved. Magnifier compensation displacement curve was found using mechanical compensation theory. Based on control techniques of digital signal processing （DSP） and stepping motor, a control system was designed including DSP, stepping motor, stepping motor driver, keyboard control, computer communication and LCD block. Meanwhile self-locking blocks were added to promote safety and reliability of the control system. The experimental results show that the control system accuracy is within 0. 01 mm and achieves the technical requirement of 0. 12, mm.

关 键 词：变焦镜头 机械补偿 自锁 数字信号处理器 集成度 

分 类 号：TM359.4[电气工程—电机]