| Agriculture is the foundation of the national economy and the land is the survival basis for the farmers. The farmers shall not rely too much on the traditional farming model to increase their income. And with the China’s urbanization developing, the rural land intensive management carried out in succession. Greenhouse planting patterns make full use of the limited agricultural land to achieve intensive and meticulous farming in spite of the environment and climate, so the farmers can plant the high value-added vegetable or fruit which are anti-season and with high-quality in greenhouse to increase their income and improve their quality of life. However in our country the greenhouses with the characters of limited scale, confusion management and artificial cultivation commonly, which lead to great waste of property and manpower.Now with the rapid development of information technology, Internet of things (IOT) is widely used in various industries. Networking technology is widely applied to agricultural greenhouse cultivation, stable and efficient monitoring system is developed to realize remote data acquisition and switch control, which will change our agricultural planting mode and accelerate the development of our modern agriculture. Based on IOT agricultural greenhouse planting monitoring system can not only monitor and control environmental parameter such as air temperature, humidity, light intensity, CO2 concentration and soil moisture in greenhouse, but also realize the crop growth automation management in the process.In the paper we firstly introduce the brief background and significance on the application of IOT technology in agriculture, outlines the current research status at home and abroad. After analysis of IOT application characteristics and several key technology in agriculture, a design assignment of agricultural greenhouse monitoring system on IOT is proposed based on feasibility analysis, functional requirements and system overall design. Emphasis of the paper is placed on the function design and data flow analysis of the monitoring system which is divided into three levels. First, the environmental data acquired by the various sensors in perception layer. Second, the data transfer and processing by various network devices in the network layer. Finally, data querying and remote control functions are realized in terminal application layer. In order to build up the system physical structure of the wireless sensor network(WSN) to real-time monitor the environmental data in greenhouse, we choose the appropriate terminal sensors (temperature, humidity, light intensity, CO2 concentration, soil moisture and network camera) after considering the factors of price, safety, stability and anti-interference ability in combination with market supply. The ZigBee network is connected with internet by the gateway in the network layer, and the data acquired by the sensors is transmitted through the access network to the server for storage and processing. In the terminal application layer we developed two remote monitoring platforms to display the real-time data collection and manage the data record, one is based on the Web services and the other is on android system. Simultaneously, the system will automatically alarm if the data exceeds the predetermined threshold, so that the operator understands the system working status and make the corresponding adjustment by remote command execution in time.Through the above work, the monitoring and control function of greenhouse crop growth system based on IOT is realized after installation and adjustment, and until now the system running in a good condition. The result shows that the greenhouse planting monitor system we developed is practical and feasible, that provides the prospect of popularization and application with the advantages of low cost, low energy, strong adaptability, easy operation, etc. |
