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The intelligent agricultural wireless monitoring system is a resource-saving and efficient facility agricultural technology that combines computer automatic control technology, intelligent sensor technology and other high-tech means. It is mainly based on the temperature, humidity, carbon dioxide content, photosynthetic effective radiation and soil conditions of the environment. And other factors to control the various indicators in the greenhouse to create the best environment suitable for crop growth. Obviously, how to obtain these environmental information accurately, stably and conveniently has become the key to the entire system. With the development of short-range wireless communication in recent years, the emerging wireless sensor network technology provides a strong technical guarantee for the sensor link in the intelligent greenhouse system.
Beijing Weixun Amethyst Technology Co., Ltd. is currently the governing unit of Beijing Zhongguancun Internet of Things Industry Alliance. Based on years of accumulation in the fields of short-range wireless communication standards, chips and sensor network technology, it has independently developed support for large-scale self-organization and synchronization functions. The protocol stack USSN (Ultra-Scale SensorNetworks) of the wireless sensor network with low power consumption. USSN refers to a network formed by a number of nodes connected to each other wirelessly. Data at any point in the network can be forwarded by other neighboring nodes. Data forwarding can expand network coverage. The terminal node data is transmitted through the network and then collected to the gateway, and then transmitted to the upper computer by the gateway through other communication protocols and methods, as shown in the figure: Verizon Amethyst is based on USSN technology and combines a variety of agricultural production needs. Developed an intelligent agricultural wireless monitoring system with independent intellectual property rights, which can provide all-weather, unattended, maintenance-free and power-free wireless monitoring services.
system structure:
The whole system is composed of wireless data collector, wireless switch controller, wireless data gateway (multiple), PC and network server (optional), the structure is as shown in the figure below. The gateway, collector and controller adopt USSN sensor network technology for wireless connection. Each gateway can connect to hundreds of terminal devices at the same time, and all terminals are automatically networked and work synchronously. The gateway and PC or web server are connected via Ethernet or mobile communication network. The gateway is at the core of the system. The data collected by all sensors must be collected in the gateway, and all control commands to the terminal must also be sent down through the gateway. The gateway has a built-in powerful operating system that can maintain and store the network and data. After the PC directly logs in to the gateway through a network cable or a local area network, operations such as system settings, network management, data viewing, graphing, and data export can be performed. The gateway also has the remote transmission capability, and all configuration data and collected data are transmitted to the network server through the local area network or 3G. This mode supports multiple users to log in to the network server at the same time to view the data of the gateway.
System function description:
Both the wireless data gateway and the network server provide powerful and user-friendly software. After logging in to the gateway or network server according to different operating permissions, users can perform system settings, network management, data viewing, drawing charts, and data export operations.
1) System monitoring
After logging in, all users can view the real-time data of all sensors in the sensor network, and support classification viewing and retrieval functions. For selected nodes, the system can draw curves to facilitate users to study short-term trends of data.
In viewing historical data, the software also provides a good filtering function, which is convenient for users to accurately grasp the changes of sensor values, and can use the way of drawing curves to conduct trend research, as shown in the figure below.
2) Equipment management
Under this interface, users can manage the authentication, networking, topology structure and personalized information of all nodes in the wireless sensor network. This part is the core of the gateway and the core of the entire wireless monitoring system. Data upload and control operations can only be realized after all wireless collectors and controllers are networked normally.
3) Alarm management
In the alarm management module, the user can set the alarm for a certain collector individually or in batches for the same type of collectors, including the upper and lower limits of the value, whether to enable the alarm function, the mobile phone number for sending the alarm message, and the alarm email address . When a sensor exceeds the preset limit value, the node will be marked in red on the monitoring interface, and an alarm will be issued according to the preset alarm mode. The software will record all the alarms for the user to view.
4) Data maintenance
The software provides the function of data maintenance, including the export and backup of all sensor data, the import and export of gateway settings, the import and export of network configuration, and so on.
5) Control management
The software supports manual and automatic control of the switch controller. In manual mode, users can switch and control equipment such as film rolling machine, rolling machine, fan, etc. through the buttons on the interface. In the automatic mode, the system will control all devices according to the user’s pre-set strategy. Users can define their own control strategies for the combined conditions according to their needs.
6) System settings
In the system setting module, the user can set the working mode of the gateway and decide whether the gateway should communicate with the public network server and upload data. In addition, users can configure network connection-related parameters such as the gateway’s LAN IP address, dynamic domain name resolution, and WIFI in this module.
System Features:
The system adopts 3G+USSN full wireless architecture, no wiring construction is required, and maintenance cost is low
USSN wireless sensor network technology complies with IEEE802.15.4C international standard and CWPAN national standard, green, environmentally friendly, and non-radiation
The USSN sensor network has ultra-low power consumption characteristics that are synchronized across the entire network. Energy-saving sensor nodes can work for more than 1 year using ordinary battery power.
Automatic network load balancing, the power consumption of all wireless nodes in the network can be evaluated, and the power consumption is similar
Automatic networking, self-maintenance, visual network connection, stable operation around the clock, without manual intervention
All wireless collectors are easy to install, plug and play, and the installation position can be changed arbitrarily without being restricted by cables
Good network expansion capabilities, increase and decrease the number of collection terminals at will, support hundreds of collectors and controllers in the same network
Frequency hopping and encryption authentication mechanism to ensure the safe and reliable operation of the system
Various management methods, users can directly access the gateway or network server to manage all monitoring
The management software has a friendly interface and powerful functions to ensure timely and accurate data recording and analysis, and the system is stable and reliable
The wireless sensor network works independently and does not need to pay any fees. The data of multiple collectors are sent through a gateway in a unified manner, saving 3G data charges.
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