Research And Implementation Of Intelligent Ground Meteorological Monitor

Global warming,drought,flood damage,hot weather,cryogenic freezing,and other extreme weather happened continually in recent years, and their impact is wide day by day. Monitoring and measuring meteorological elements continuously for basic meteorological data are indispensable to provide public meteorological services. It can offer exact and reliable data for weather forecast, meteorological service, climate change evaluation and meteorological scientific research. It also can improve the ability of disaster prevention and mitigation, and react on the work of replying climate change. Aiming at the demand of the operation above, a new generation of intelligent ground meteorological monitor is studied in the thesis.This thesis presents the design and implementation of an intelligent ground meteorological monitor. Firstly, development of meteorological instruments is described. Secondly, the functional characteristics of a new generation of an intelligent ground meteorological monitor are introduced, and a comparatively perfect design scheme of the system is shown according to practical demands of meteorological operation in China. Then the process of type selection and the functional characteristics of SCM system chip, data memory chip and program memory chip are described in detail based on the hardware design scheme. The process of type selecting and work principle of wind direction sensor, wind speed sensor, rain gauge, temperature sensor, humidity sensor and air pressure sensor are also introduced based on the requirement of detecting meteorological data. According to SCM and electric properties of diversified sensors, detailed scheme of input/output circuit interface is introduced. Design of CAN bus is introduced according to the CAN bus technique. Analog digital transform circuit, power supply circuit, real clock circuit, LED display circuit and RS232 communication interface circuit are designed, and their functions are introduced.The design of scheme and compilation of meteorological data acquisition processor software are emphatically introduced. It includes the design of meteorological data reading module, time task module, receiving and transmitting module, checking and mistake processing module and LED display module. The main program code is shown in the appendix. The software of computer processing and analyzing are introduced in detail. Some program pictures are shown in the appendix.Besides designing the instrument, it is measured according to practice check. By analyzing the data measured, the reliability and credibility of the instrument are evaluated. At last, its functional characteristics are summarized synthetically.