激光测月回波探测器位置控制系统设计  

Position Control System Design of Return Laser Pulse Detector for Lunar Laser Ranging

作　　者：李祝莲[1] 何少辉[1] 伏红林[1] 黄涛[1] 张海涛[1] 

机构地区：[1]中国科学院云南天文台,云南昆明650011

出　　处：《激光与光电子学进展》2012年第5期88-91,共4页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(10778705)资助课题

摘　　要：激光测月(LLR)具有测量距离远和回波光子少的特点,观测中需要适当更新回波探测器的位置以提高回波探测概率。采用现场可编程门阵列(FPGA)技术研制多步进电机同步控制系统,并结合VC++软件开发工具开发其计算机控制程序,最终实现回波探测器在xoy探测平面上位置的计算机控制。测试结果表明,两个步进电机可以各自单独运行或同时运行,使回波探测器可以单独沿着x轴或y轴移动,也可以同时沿着x轴和y轴移动,最小移动步长为2.5μm,实现对探测器位置的精准控制。Lunar laser ranging （LLR） has the characteristics of far measurement range and small number ot return laser photons, so the position of detector receiving return photons should be adjusted properly during LLR observation to improve the detection success probability. Synchronization control system for multiple step motors is researched and realized with the technique of field programmable gate array （FPGA）, and control interview program is developed with VC＋ ＋ software developing instrument. Finally, computer control of the detector position is realized on xoy detecting plate. Test result indicates that two step motors can run separately or simultaneously, so that the detector could move along x axis or y axis alone, or along x axis and y axis at the same time. The minimal step length is 2.5μm, which allows for precise detector position control.

关 键 词：测量 激光测月 步进电机 现场可编程门阵列 计算机控制 

分 类 号：P129[天文地球—天体测量] P111.3[天文地球—天文学]