| Summary: | 碩士 === 國立屏東科技大學 === 生物機電工程系所 === 104 === This research establishes a wireless multi-sensors network system to apply to environment sensing and control applications in greenhouse. The use of proposed system can maintain the micro-environmental factor condition consistent for each zone in greenhouse and achieve the purpose of standardized planting. The network system consists of main control, multiple sub-control and sensing system, which collect the environment factor information of each node in greenhouse and perform environment control decision based on expert knowledge database. The user can utilize the graphic user interface (GUI) to setup the desired environment factors (such as temperature, humidity, carbon dioxide, and photo flux) of each zone and then send it to the sub-system via Zigbee module. The environment factor control module of each sub-system will be performed to maintain the desired environment factor setup by the user. The experiment is tested in semi-closed cylindrical chamber which includes four cultivation zones. One sub-system and sensors are installed in each zone (volume: 60x120x30 cm3) and the major system is placed outside the chamber. The experiment result demonstrates that the regulation error of environment factor is totally 12%. The proposed system is helpful for user to observe the variation of environment factor of each cultivation zone remotely through GUI. Meanwhile, the regulation of environment factors is executed automatically. The proposed method can achieve a different manipulation of each cultivation zone for heterogeneous environments.
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