Research on the principle of space high-precision temperature control system of liquid crystals based Stokes polarimeter
Research on the principle of space high-precision temperature control system of liquid crystals based Stokes polarimeter
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基于斯托克斯旋光仪的空间高精度液晶温控系统原理研究
DOI：
10.1088/1674-4527/21/1/10
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发表时间：
2021-01
影响因子：
1.8
通讯作者：
Deng Yuan-Yong
中科院分区：
文献类型：
--
作者：
Zhang Xin-Wei;Zhang Yang;Lin Jia-Ben;Hou Jun-Feng;Deng Yuan-Yong
磁场是太阳物理中最重要的参数之一，而旋光仪是测量太阳磁场的关键设备。液晶偏振计是一项新技术，将用于我国研制的第一颗空间太阳观测卫星--先进空间太阳观测卫星的磁场测量。然而，液晶偏振计在空间上的应用还不是一项成熟的技术。因此，研究该装置的控制方法和特性具有重要的科学意义。液晶可变延迟器产生的延迟对温度敏感，每0.1° C延迟变化0.09°。这种变化引起的极化测量误差为0.016，影响了磁场测量的准确性。为了保证液晶偏振器性能的稳定性，提出了一种高精度的液晶偏振器温度控制系统。为了优化液晶偏振器的结构设计和温控系统，采用有限元法对液晶偏振器的温度场进行了分析，并从理论上分析了光对液晶可变延迟器温度场的影响。通过分析空间高精度温度测量原理，设计了基于集成运算放大器、可编程放大器和12位A/D的高精度温度测量电路，并应用积分分离PI温度控制算法和PWM驱动加热膜，开发了高精度空间温度控制系统。实验结果表明，无论是在空气中还是在真空中，液晶偏振计的温度控制效果都是准确和稳定的。温度稳定性在±0.015° C内，这表明基于液晶的斯托克斯偏振计的稳定性大大提高。
The magnetic field is one of the most important parameters in solar physics, and a polarimeter is the key device to measure the solar magnetic field. Liquid crystals based Stokes polarimeter is a novel technology, and will be applied for magnetic field measurement in the first space-based solar observatory satellite developed by China, Advanced Space-based Solar Observatory. However, the liquid crystals based Stokes polarimeter in space is not a mature technology. Therefore, it is of great scientific significance to study the control method and characteristics of the device. The retardation produced by a liquid crystal variable retarder is sensitive to the temperature, and the retardation changes 0.09° per 0.1° C. The error in polarization measurement caused by this change is 0.016, which affects the accuracy of magnetic field measurement. In order to ensure the stability of its performance, this paper proposes a high-precision temperature control system for liquid crystals based Stokes polarimeter in space. In order to optimize the structure design and temperature control system, the temperature field of liquid crystals based Stokes polarimeter is analyzed by the finite element method, and the influence of light on the temperature field of the liquid crystal variable retarder is analyzed theoretically. By analyzing the principle of high-precision temperature measurement in space, a high-precision temperature measurement circuit based on integrated operational amplifier, programmable amplifier and 12 bit A/D is designed, and a high-precision space temperature control system is developed by applying the integral separation PI temperature control algorithm and PWM driving heating films. The experimental results show that the effect of temperature control is accurate and stable, whenever the liquid crystals based Stokes polarimeter is either in the air or vacuum. The temperature stability is within ±0.015° C, which demonstrates greatly improved stability for the liquid crystals based Stokes polarimeter.
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DOI：
10.3788/ope.20182607.1604
发表时间：
2018
期刊：
Optics and Precision Engineering
影响因子：
--
作者：
朱均超 Zhu Jun-cao;豆梓文 Dou Zi-wen;李嘉强 Li Jia-qiang;徐晓明 Xu Xiao-ming
通讯作者：
朱均超 Zhu Jun-cao;豆梓文 Dou Zi-wen;李嘉强 Li Jia-qiang;徐晓明 Xu Xiao-ming
DOI：
10.1109/28.60060
发表时间：
1988-10
期刊：
Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting
影响因子：
--
作者：
R. Wu;Shashi B. Dewan;G. Slemon
通讯作者：
R. Wu;Shashi B. Dewan;G. Slemon
先进天基太阳观测站（ASO-S）：概述
DOI：
10.1088/1674-4527/19/11/156
发表时间：
2019-11
期刊：
RAA
影响因子：
--
作者：
Gan Weiqun
通讯作者：
Gan Weiqun
影响因子：
1.9
作者：
Heredero, R. L.;Uribe-Patarroyo, N.;Alvarez-Herrero, A.
通讯作者：
Alvarez-Herrero, A.
影响因子：
1.8
作者：
Yuanyong Deng;Haiying Zhang;Jian-feng Yang;Fu Li;Jiaben Lin;Junfeng Hou;Zhanghua Wu;Q. Song
通讯作者：
Yuanyong Deng;Haiying Zhang;Jian-feng Yang;Fu Li;Jiaben Lin;Junfeng Hou;Zhanghua Wu;Q. Song