Abstract:

Semi - Arid Climate and EnvironmentObservatory of Lanzhou University ( SACOL) is the first research climate and environment observation p latform with kinds of p recise atmospheric observation instruments built at university in China. Aiming at the disadvantages of dispersive instruments and multi - data formats at SACOL, we p ropose a new system integration method for atmospheric exp loration instruments, which uses a p rincipal computer to control all of observation instruments. Firstly, wemake an observation system including network interface (micro - pulse lidar,atmospheric quality monitoring system) connect with the p rincipal computer throughHub to control the observation subsystems in the use of remote desktop. Secondly, we extend the number of the serial ports in the p rincipal controllerwith PCI bus, and let TP - WVP3000 and CE - 318 communicate with the p rincipal controller directly. Thirdly, we utilize the technology of electric current loop and drive the RS232 output signal from observation instruments, such asMFR, TP - WVP3000, CE - 318 and so on, with long - term driver, to increase the maximum communication distance to 2 000 m. Finally, for the instrumentswith the American Campbell data collectorswhich are used for near ground surface observation, radiation, soil, flux and so on, we use serial port instrument network server to convert RS232 signal to data format TCP, and send it to the p rincipal controller through Ethernet interface, at the same time, create the virtual serial portswithout difference from the real serial ports, with the advan
tage of needless to modify the original software Loggernet based on COM communication ports. This paper mainly introduces a new method, which establishesmulti digital communication transportationmodes to realize auto management of the integrated observation instruments based on modern communication technology.

Key words: atmospheric exp loration, system integration, serial port RS232} RS422, TCP / IP

摘要：

兰州大学半干旱气候与环境观测站( SACOL)是国内第一个在高校建立的研究型气候与环境观测平台,拥有各类精密大气探测仪器。针对当前气候站仪器分散、数据格式多的特点,本文提出了大气探测仪器系统集成新思路,利用1台主控计算机完成对所有观测仪器的控制: (1)将已具有网络接口的观测系统(微脉冲激光雷达、大气质量监测系统)通过Hub连接至主控机,利用远程桌面完成对观测子系统的控制; (2)利用PCI总线,扩展主控计算机的串口数量,使TP WVP3000和CE - 318与主控机直接通信; (3)采用电流环技术,将MFR等观测仪器输出的RS232信号经过长线驱动器,能够达到最远2 000 m的通讯距离; (4)对具有美国Campbell数据采集器的近地层观测、辐射、土壤、通量等仪器,使用串口设备联网服务器将RS232信号转换成TCP数据格式,经以太网口发送至主控计算机,同时创建出与真实串口无区别的虚拟串口,不需要修改原有的基于COM通讯的Loggernet软件。本文方法以现代通信技术为基础,建立多种数字通讯传输方式,实现观测仪器集成式的自动化管理。关

关键词: 大气探测, 集成通讯, RS232, RS422, TCP / IP