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Proceedings Paper

Data acquisition system in the LLMC
Author(s): Binhua Li; Lei Yang; Wei Mao; Xiaobin Wang
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Paper Abstract

Two data acquisition systems of the Lower Latitude Meridian Circle (LLMC) are described in this paper, of which one is based on a video CCD and the other is based ona scientific CCD. To determine the position of a celestial body absolutely and precisely, the LLMC is equipped with several precision measurement devices such as one precision clock, nine Reticon linear photodiode arrays, one video CCD, one scientific CCD, one rotary inductive synchronizer, and one grating linear displacement transducer. To control these devices properly and collect data from these devices orderly during observations, two data acquisition and control systems are developed. The one based on a video CCD is used to test the instrumental precision of the LLMC. The other based on a scientific CCD is used for normal observations, and is composed of three subsystems. We will illustrate the functions of the measurement devices in the two systems, discuss the methods of data acquisition, and present our thoughts about software programming in the paper.

Paper Details

Date Published: 24 October 2000
PDF: 9 pages
Proc. SPIE 4093, Current Developments in Lens Design and Optical Systems Engineering, (24 October 2000); doi: 10.1117/12.405204
Show Author Affiliations
Binhua Li, Yunnan Observatory (China)
Lei Yang, Yunnan Observatory (China)
Wei Mao, Yunnan Observatory (China)
Xiaobin Wang, Yunnan Observatory (China)


Published in SPIE Proceedings Vol. 4093:
Current Developments in Lens Design and Optical Systems Engineering
Robert E. Fischer; Robert E. Fischer; R. Barry Johnson; Warren J. Smith; Warren J. Smith; William H. Swantner, Editor(s)

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