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NVST狭缝扫描系统及定标单元的控制
其他题名The Control of NVST’s Slit Scanning System and Polarization Calibration Equipment
杨长春
学位类型硕士
导师许骏
2015-07-01
学位授予单位中国科学院研究生院
学位授予地点北京
学位专业天文技术与方法
关键词一米红外太阳望远镜 狭缝扫描 定标单元 运动控制 观测系统
摘要一米新真空太阳望远镜(New Vacuum Solar Telescope,NVST)位于抚仙湖太阳观测站,用于太阳活动区的精细光谱分析和磁场的高分辨率精细结构研究。在多波段光谱仪及大色散光谱仪等终端设备基础上,采用偏振成像和光谱观测的方法可实现太阳矢量磁场观测。在光谱仪消旋转台上设计了狭缝扫描机构,基于扫描机构将光路步进平移进入狭缝之后的光谱仪系统,可实现光谱扫描观测。偏振测量系统中,消旋转台的狭缝窗口前设计有一套偏振分析器,并在望远镜真空主镜筒内设计一套定标单元设备,以克服望远镜仪器偏振造成的测量误差影响。论文主要阐述的内容,针对于光谱扫描系统及偏振测量系统中各电动执行机构的运动控制。论文中首先介绍了光谱扫描系统及偏振测量系统的工作原理,并得出对应设备的运动控制需求。然后阐述了针对光谱扫描系统及偏振测量系统中各设备的运动控制需求进行的控制软件设计,并介绍了局域网内的远程设备控制实现。之后介绍在后期设计中,集合了扫描设备的运动控制以及控制相机进行图像采集的一套观测系统软件设计。设计的相关软件用于NVST进行了观测测试,实现了预期目标功能,此设计也具有较好的移植性和扩展性,可为后续观测系统功能的升级改造,提供一些参考价值。
其他摘要The 1m New Vacuum Solar Telescope (NVST) is the primary facility of Fuxian Solar Observatory (FSO), and the main scientific goals are high resolution imaging and spectral observation of chromosphere and photosphere, including their fine structure of magnetic field on the solar active region. Two vertical grating spectrometer (multi-wave spectrometer & high dispersion spectrometer) placed in the hanging bracket below the rotating platform, aims to observe the sun spectrum finely, on the base of these equipment and instruments, designed a slit scanning system placed above the rotating platform. Aim to parallel moving the light path into spectrograph system decorate after the slit, use an electric lifting platform and four plane mirrors can realize this purpose. Based on this slit scanning equipment, spectral scanning observation can be realized. A polarization analyzer is placed front the slit, above the rotating platform, and more, a set of polarization calibration instrument is design and installation in the telescope lens barrel, to compensate the instrumental polarization and realize a high-precision measurement. For the spectral scanning system and polarization measurement, their electric actuator automatic motion control is needed when observation system at working, that is this paper mainly content. Firstly, for a short introduce about the spectral scanning system and polarization measuring system, and describe the basic motion control requirements. And then, expound the control software design to realize these requirements, also introduce the realization of these instruments’ remote control design based on windows socket communication. Finally, describe a software design for spectral scanning, combined with the control of slit scanning equipment and CCD camera, realize the scanning spectrum image acquisition. Related software has been used for observation, consider into subsequent observation system upgrades develop, some improvement methods on these software design also proposed.
学科领域天文学
语种中文
文献类型学位论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9460
专题抚仙湖太阳观测站
作者单位中国科学院云南天文台
推荐引用方式
GB/T 7714
杨长春. NVST狭缝扫描系统及定标单元的控制[D]. 北京. 中国科学院研究生院,2015.
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