云台等高仪自控系统和光子计数接收处理终端研制

Development of the Automatic Control System and Photon Counting Terminal of An Astrolabe at the Yunnan Observatory

在等高仪的转轴上安装角检测元件——圆感应同步器和数显表,用微机控制等高仪自动导星定位、自动方位跟踪。定位精度±3～4″,跟踪精度±4″。采用光子计数接收处理终端,使等高仪观测极限星等从原来的7等提高到11等。

A circle inductosyn and a digital indicator, the elements of the angle tester, are installed on the rotation axis of the astrolabe. The location of the automatic guiding and the position tracking of the astrolabe are controlled by a microcomputer. The tracking and location accuracies are ±4' and ±3-4', respectively. By adopting the photon counting technique, the limiting magnitude of the astrolabe increases up to the 11th magnitude from the original 7th one. The observational capability of the instrument is greatly increased and it will make greater contribution to the future star catalog compilation.