Power monitoring and control system for fiber positioners in LAMOST

Guifeng Chen; Yang Zhang; Chao Fang; Chao Zhai

doi:10.1117/12.3018173

26 August 2024 Power monitoring and control system for fiber positioners in LAMOST

Guifeng Chen, Yang Zhang, Chao Fang, Chao Zhai

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131004W (2024) https://doi.org/10.1117/12.3018173
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Fiber positioner is the key component of multi-object spectral survey telescope. In LAMOST, 4,000 fiber positioners accept DC voltages for power from 64 switch power sources. The working conditions of fiber positioners need to be monitored in case that over-current phenomenon damages positioners and raises the temperature of positioners and focal plane which can seriously damage position accuracy. Considering that positioners being used in LAMOST cannot change their electrical properties, this paper implemented a power monitoring and control system based on RS485 bus and LabVIEW to avoid over-current phenomenon in LAMOST. CC6920, distributing voltage circuit and DS18B20 are used to monitor the output current, voltage and temperature of the power source respectively in real time. The monitoring values are shown on LCD and returned to IPC to be saved. When the value exceeds the rated value, relay will cut off the power and a mail will be sent to staff. The validity of the power monitoring and control system is verified by experiment in the actual environment. The preliminary results show that the system has good stability and the response time is less than 70ms. The system which has been used in LAMOST is low in cost, fast in response, convenient in use and expandable.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Guifeng Chen, Yang Zhang, Chao Fang, and Chao Zhai "Power monitoring and control system for fiber positioners in LAMOST", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131004W (26 August 2024); https://doi.org/10.1117/12.3018173

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