industry

With the rapid development of social economy and industry and rapid growth of population, people want to live a better life in a much better surroundings. Thus monitoring environment mediums is becoming a social focus. Especially the environmental quality is degrading, more attention is paid to how to monitor environment medium. The traditional mode of environment monitoring, which is mainly manual and poor intelligence, can not meet the requirement of modern environment monitoring. To meet this demand, a wireless sensor tiny network to monitor environment medium was designed and developed on the basis of the existing hardware platform of ZigBee wireless sensor network (WSN). The thesis contained three sections as follows:Firstly, the sensor module of environment medium WSN was designed and optimized. Three kinds of converting circuits for oxygen sensor, temperature sensor and humidity sensor were designed. Quadratic rectification was applied to reduce the error of measurement. The error of oxygen sensor was reduced from±0.7% to±0.4%; while the error of temperature sensor was reduced from±0.8℃to±0.4℃; the error of humidity sensor was reduced from±2RH% to±0.9RH%.Secondly, a wireless sensor tiny network to monitor environment medium was designed and developed.