一种航空相机调焦控制系统  

An aerial focusing control system

作　　者：周磊[1] 李葆勇[1] 王志宏[1] 龙科慧[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：《微计算机信息》2010年第14期42-43,143,共3页Control & Automation

摘　　要：给出了一种航空相机调焦控制系统的实现方法。系统采用一片51微控制器完成四台相机的闭环调焦控制。整个系统有效的利用了51微控制器的硬件资源,减小了系统的体积。实验结果表明,系统的应答时间小于1.2ms(系统要求<1.5ms),调焦精度小于±2μm,满足系统(<±5μm)的要求。In this paper,we presented an aerial focusing control system based on single-chip computer.A MCS-51 compatible microcontroller was used to perform data acquisition and processing of photoelectric encoder,communication with top management system by RS-485,controlling of four closed-loop focusing systems.With the time-multiplexed bus,the entire system makes use of hardware resource of the microcontroller effciently in controlling four stepper-motors.In our testing,the response time of this system is less than 1.2ms（Treq1.5ms）,and the precision of focusing meets our requirement.

关 键 词：调焦控制 闭环 步进电机 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]