抚仙湖太阳观测和研究基地知识库

利用1 m红外太阳望远镜(New Vacuum Solar Telescope, NVST)对太阳进行观测和研究, 需要控制狭缝扫描系统和磁分析系统中各设备的运动以配合观测系统采集数据。针对实际观测中对设备运动控制的需求,并利用控制器对相应设备的直接控制,提出基于TCP协议及UDP协议的Win Sock网络编程以及串口通信编程的设计方案,设计了一套基于Client/Server架构的控制系统软件,实现各仪器在局域网范围内的远程控制。通过对设备的运动控制测试,客户端发送控制命令给服务器端,服务器计算机解析命令并通过串口控制各仪器运行, 同时采集设备的状态信息反馈给客户端, 测试结果表明此系统能良好地控制各设备运行, 结合网络通信及串口通信的设计为后续的观测系统功能升级打下了基础。

The NVST (New Vacuum Solar Telescope) of the Yunnan Observatories (YNAO) is for observations of fine solar structures though high-resolution imaging instruments and spectrometers in conjuncture with polarization analyzers. During observation with the NVST the slit scanning and motions of the polarization measurement instruments need to be controlled synchronously with the data-collecting systems. In this paper, we present the design and implementation of an electric control system to remotely control motions of these instruments (including the polarization analyzers and slit-scanning devices) according to observational requirements. The remote control is achieved using a server computer from which commands are sent to control machineries associated with various separate controllers via a serial port on the computer and then a LAN network. Needed data and messages are fed back to the client through the LAN. The system is designed based on WinSock network programming and serial-port communication programming using the TCP and UDP protocols. The control system incorporates a software system for operation in the Server/Client architecture. Our experimental results show that this control system is effective in controlling the instruments on the NVST, and the design incorporating network/serial-port communications provides excellent extensibility for subsequent upgrading of the NVST to expand its functions.