基于两个导电滑环实现天窗驱动和状态检测  

Achieving Dome Slit Driving and Status Detection with Two Conductive Rings

作　　者：陈颖为[1] 

机构地区：[1]中国科学院国家天文台,北京100012

出　　处：《天文研究与技术》2016年第2期213-218,共6页Astronomical Research & Technology

基　　金：国家自然科学天文联合基金(U1331202)资助

摘　　要：目前,可旋转天文圆顶仍被大量使用,工作时圆顶可360°旋转,望远镜通过打开的天窗进行观测。国家天文台兴隆观测基地的天窗选用5个导电滑环,但不能检测状态。为了简化天窗的状态检测、驱动系统,并提高其可靠性,利用二极管的单向导通特性设计了一种新型天窗状态检测、驱动电路。该电路只需要两个导电滑环和两个限位开关,即可实现天窗的状态检测和驱动控制。当天窗处于限位状态时,二极管构成的限位电路只允许电流单向导通。当天窗处于中间位置时,则可双向导通。该电路已经在85 cm望远镜等多个圆顶的天窗状态检测控制中成功应用。天窗状态检测、控制电路极大简化了测控系统,并可进行故障检测。At present,rotating domes with slit are still widely used in astronomical observations. They could rotate for 360 degrees and the telescope observes stars through the dome slit. In Xinglong Observatory of National Astronomical Observatories,some telescopes use five conductive rings to control the dome slit,but the state cannot be detected. In order to simplify the detection and control system and improve the reliability of the dome slit,a new type of dome slit state detection and driving circuit is proposed. This circuit only makes use of two conductive rings and two limit switches with diodes to realize the dome slit state detection and driving control. When the dome slit is in the limit state,the detection electric current is only able to transfer in one direction. And when the dome slit is in the middle position,it could transfer in both directions. The circuit has been successfully applied in several dome slits in Xinglong Observatory,for example,the 85 cm reflecting telescope. The test and practical use show that the circuit could be well used in the state detection and driving control process; it greatly simplifies the system; besides,it could also serve the purpose of failure detection.

关 键 词：天窗状态检测 导电滑环 晶闸管 场效应管 桥路开关 

分 类 号：P111.2[天文地球—天文学]