Application of Wireless Sensor Networks in Agriculture
Application of Wireless Sensor Networks in Agriculture Application of Wireless Sensor Networks in Agriculture Wireless Sensor Networks in Agriculture Application of Wireless Sensor Networks in Agriculture In the past decade, with the development of intelligent agriculture and precision agriculture, the application of technologies such as communication networks, intelligent sensing chips, mobile embedded systems in agriculture has gradually become a research hotspot. Point. Dense wireless sensor networks (WSNs) are all-distributed systems without central nodes. By means of random placement, many sensor nodes are intensively deployed in the monitoring area. These sensor nodes are integrated with sensors, data processing units, communication modules and energy units. They are connected through wireless channels and self-organized into network systems. Its purpose is to cooperatively perceive, collect and process the information of the monitored objects in the network coverage area and send it to the observer. Wireless sensor networks (WSNs) integrate sensor technology, micro-electromechanical system (MEMS) technology, wireless communication technology, embedded computing technology and distributed information processing technology. Because of its broad application prospects, WSNs have become a hotspot in the world and become a highly interdisciplinary research field. In traditional agriculture. People have limited access to farmland information, mainly through manual measurement, the acquisition process requires a lot of human resources, and the use of wireless sensor networks can effectively reduce human consumption and impact on the farmland environment, to obtain accurate crop environment and crop information. At present, wireless technology is widely used in agriculture, but most of them are based on the star-shaped topology of the base station, which is not really a wireless sensor network. The general application of agriculture is that a large number of sensor nodes form a monitoring network to collect information through various sensors to help farmers find problems in time and determine the location of the problems accurately. This will make it possible for agriculture to gradually shift from a production mode centered on human resources and dependent on isolated machinery to a production mode centered on information and software, which will be widely used. Various automatic, intelligent, remote control production equipment.
Wireless sensor network is applied to greenhouse environmental information collection and control.
In the greenhouse environment, a single greenhouse can become a measurement and control area of wireless sensor network. Different sensor nodes and simple actuator nodes (such as fan, low voltage motor, valve and other actuators with low working current) constitute a wireless network to measure soil moisture, soil composition, pH value, precipitation, temperature, air humidity and pressure, and light intensity. At the same time, bioinformatics acquisition method is applied to wireless sensor nodes to provide scientific basis for precise regulation of greenhouse. Finally, the sensors and executing agencies in greenhouse are standardized and digitalized, and the control devices are networked by gateway, so as to achieve the goal of convenient on-site networking, increasing crop yield, improving quality, adjusting growth cycle and improving economic benefits.
Application of wireless sensor network in water-saving irrigation.
Wireless sensor network automatic irrigation system uses sensors to sense soil moisture and communicate with receivers under set conditions to control the opening and closing of valves in irrigation system, so as to achieve the purpose of automatic water-saving irrigation. Because of the characteristics of multi-hop routing, information mutual delivery, self-organizing network and synchronization of network communication time, the area and number of irrigation area nodes are not limited, and the rotation irrigation group can be flexibly increased or decreased. In addition, the dynamic management information acquisition and analysis technology of irrigation area, which combines the Internet function of communication gateway with RS and GPS technology, and the measurement and acquisition devices of soil, plant and meteorology, can be added to the nodes. Agricultural water-saving irrigation platform with high efficiency, low energy consumption, low input and multi-function was constructed by crop water demand information collection and precision control irrigation technology and expert system technology. It can be used in greenhouse, garden green space, highway central isolation zone, irrigation area for farmland wells and other areas to realize the quantification, standardization, modelling and integration of agricultural and ecological water-saving technology, and promote the rapid and healthy development of water-saving agriculture. In 2008, Hunan Agricultural University proposed a scheme of automatic water-saving irrigation for farmland based on wireless sensor network. A wireless sensor network was designed to realize real-time collection and transmission of soil moisture information in farmland. Irrigation pipe network was controlled by irrigation controller, real-time irrigation in different regions and soil moisture was regulated. The spatial-temporal differences and water resources required by precision agriculture were realized. Efficient utilization of resources.
Wireless sensor networks are applied to environmental information and animal and plant information monitoring.
Through laying out a multi-level wireless sensor network detection system, we can observe and study the living habits, environment, physiological status and population complexity of livestock and poultry, aquaculture and rare animals. It can also be used for forest environmental monitoring and fire alarm (usually nodes are randomly distributed in the forest, and periodically report environmental data under normal conditions. When fire occurs, nodes can also be used to monitor and alarm forest environment. Through collaboration, the specific address of the fire source and the size of the fire will be transmitted to the relevant departments in a very short time. It can also be used in precision agriculture to monitor pests in crops, soil acidity and alkalinity, and fertilization status.
During the Tenth Five-Year Plan period, the National 863 Program of Digital Agriculture has achieved a breakthrough in the field information collection technology, and introduced a number of low-cost, high-performance soil moisture and crop nutrition.