Research and design of monitoring and early warning system for agricultural meteorological element in greenhouse

Abstract

Select the ATmega128 microcontroller as the master chip, a low-cost, full functional, esay-using, early warning system for monitoring the greenhouse agricultural meteorological elements is developed, which is flexible and practicable for both monitoring and warning the environmental temperature and humidity and other elements in greenhouse. In the range of 0 °C– 50 °C, the resolutions of air temperature and ground temperature are both higher than 0.1 °C, the accuracy is better than 0.5 °C. In the range of 0 °C–50 °C, the air humidity resolution can up to1%, the accuracy is6%when the air humidity≤ 80%, while the accuracy is 9%owhenthe air humidity ≥ 80%. The system can collect the meteorological elements of greenhouse in a high density, at the same time, all measurements are under the automatic real-time monitoring, if the value exceeds the normal range set in advance, the system will alarm which will alert the manual intervention to guarantee the good growth of crops in the greenhouse.