Design And Implementation Of Portable Meteorograph Based On GPRS Wireless Communication

Meteorological Cause is a Social welfare undertakings with technology and fundamental, Meteorological Service is the starting point and destination point of Meteorological Cause and made a great contribution for China’s economic construction and social development and the protection of people’s life and property safety. In China,there are many kinds of frequent meteorological disasters,various meteorological disasters affect grain production,even directly influence the sustainable development of economy and environment in China. In order to strengthen the monitoring ability of extreme climate events, improve the quantitative description of climate change and the prediction level, it is urgent to carry out good performance, high precision, stable long-term weather monitoring station for long-term continuous observation of the climate system.At present, China’s cable telemetry automatic weather station was more and more applied to the meteorological department. But in the harsh conditions such as the mountains, deserts, islands and other areas not suitable for someone on duty, we need a large number of automatic weather stations with automatic acquisition and wireless transmission (GPRS, satellite communication). In recent years, with the rapid development of wireless communication technology, especially the wide application of3G technology, making the meteorological data wireless transmission in possible. This dissertation will introduce the data acquisition technology of the automatic weather station which uses the GPRS wireless communication technology.Firstly, this dissertation introduces the hardware and software of the whole system architecture and the temperature, humidity, wind speed, wind direction, atmospheric pressure, elevation of elements such as sensor modules are introduced detailly in turns. Secondly, this dissertation introduces the software framework of the upper monitor and the lower monitor and it’s concrete work flow. Finally, this dissertation introduces the debugging process and results. This dissertation introduces a six elements and portable automatic aerograph which is designed based on GPRS, and realizes the automation and network of the meteorological data collection. By using AVR single chip computer ATmega128, temperature and humidity sensor, air pressure sensor, wind speed sensor, and wind direction sensor to collect data, through the GPRS module to upload data, using Internet to transmit the data to upper monitor, with software of the upper monitor, we can measure meteorological data in real time. In this dissertation, the monolithic integrated circuit we used is a compact low-power8bit CMOS microprocessor instruction based on the structure, it has the advantage of low power consumption and high utility. We use digital sensor DHT11to measure the temperature and humidity, the measuring ranges of the temperature and humidity are:0-50℃and20-90%HR. We use digital sensor BMP085to measure the pressure and height, the measuring ranges of the pressure and height are:300-1100hpa and+9000m-500m; we use LSM303DLH chip to measure the wind direction; we use the three cups of digital measurement of wind speed sensor to measure wind speed, the measuring range of the wind speed:0-40m/s.The upper monitor uses C++language under the framework of MFC, the lower monitor uses C language to come ture. During the process of debugging, we encountered many problems due to insufficient welding and manual data understanding, After a careful examination and debugging, we finally realize the function of uploading meteorological data automatically in the case of unattended.