Key Technology Of Sensor Network ROF Intelligent Agricultural Irrigation

Water resource as the scarce resource is not merely the problem of resource, but also it is related to the country’s economy, the social sustainable development, and the long-term stability of the major strategic issues. Developing the water-saving irrigation technology is the inevitable choice of modern agriculture. The intelligent agriculture irrigation is one part of the water-saving irrigation. Compared with the traditional agriculture irrigation, the intelligent agriculture irrigation is much powerful, high compatibility, high reliability, and low cost. The technology of the wireless sensor network has been put into use of the monitor of intelligent agriculture irrigation, which is a hot issue of the present intelligent agriculture irrigation technology. Compared with the traditional monitoring method, WSN can solve the problem of real-time monitoring, poor wiring jumbled and high cost. Meanwhile, it can monitor the agriculture irrigation and promote the development of the agriculture irrigation. The paper will research the WSN in agriculture irrigation from the two aspects of node deployment and low-power consumption.Firstly, this paper does the research towards the several method of node deployment. Then we make the comparison from the term of the coverage and the required node’s number. Based on the comparison results, we choose the hexagonal mesh to deploy the node in the irrigation. At the same time, the paper also tests the point to point rate of packet loss in the actual environment while the WSN is affected by the obstacle, electrical appliances, and rainy day. The above influence factors can reduce the reliabilities of network. Based on the NS2 simulation software, the paper analyzes the effect of the disturbance towards the reliabilities of network from the terms of packet loss rate, the delay and the network lifetime. The analysis results show that the obstacle is the biggest influence of the network reliability. We must to eliminate the impact of obstacles, electrical appliances and increase the transmit power or antenna gain. In addition, the paper proposes the specific deployment of node in the 25m×10m monitoring area.Secondly, we study the low-power consumption of the node. Based on analysing the current low-power consumption technology of sensor, the paper proposes a new method. Meanwhile, we test the method of low-power consumption with the paper designed sensor node. The result shows that the sensor node has the better function of low-power consumption, while the sensor node doing the information collection based on the low-power consumption method of state machine.Finally, the paper designed a set of sensor network monitoring system according to the special applying environment of intelligent agriculture irrigation. The system implements the collection, transport, local monitoring center of the information. It also has the function that the remote customer can access the local monitoring center. In the meantime, this paper tests the sensor network monitoring system within the demonstration area. The result shows that this system can monitor the agriculture irrigation real-timely and accurately, and it can provide the basis for irrigation decision.