The general application of the agricultural Internet of Things is to construct a monitoring network with a large number of sensor nodes, collect information through various sensors, to help farmers find problems in time, and accurately determine the location of the problem. In this way, agriculture will gradually shift from a human-centered, production-dependent production model that relies on isolated machinery to an information- and software-centric production model, thereby making extensive use of various automated, intelligent, and remotely controlled production facilities.
First, the composition and characteristics of the sensor The sensor is generally composed of four parts: the sensitive component, the conversion component, the conversion circuit and the auxiliary power supply. The characteristics of the sensor include: miniaturization, digitization, intelligence, multi-function, systemization, and networking.
The sensor not only promotes the transformation and upgrading of the traditional agricultural industry, but also may establish a new type of industry, thus becoming a new economic growth point for agriculture in the 21st century.
Second, the function of the sensor and the human five sensory organs contrast photosensitive sensor - visual acoustic sensor - auditory gas sensor - olfactory chemical sensor - taste fluid sensor - tactile
Third, the use of sensors in agriculture (1) identification of object attributes, attributes include static and dynamic attributes, static attributes can be stored directly in the tag, dynamic attributes need to be detected by sensors in real time;
(2) It is necessary to identify the device to complete the reading of the object attribute and convert the information into a data format suitable for network transmission;
(3) Transfer the information of the object to the information processing center through the network (the processing center may be distributed, such as a computer or mobile phone at home, or may be centralized, such as IDC of China Mobile), and the object communication is completed by the processing center. Related calculations.
Fourth, the application of sensors in agriculture
1. Real-time monitoring function collects data such as air temperature, air humidity, carbon dioxide, light, soil moisture, soil temperature, outdoor temperature and wind speed in the greenhouse (greenhouse) through sensing devices in real time; transmits data to the service through the mobile communication network. Management platform, service service management platform analyzes and processes data.
2. The remote control function is equipped with electro-mechanical equipment such as electric roller blind, exhaust fan, electric irrigation system for the greenhouse with good conditions, which can realize remote control function. Farmers can log in to the system through mobile phone or computer to control the switch of water valve, exhaust fan and roller blind in the greenhouse. The control logic can also be set. The system will automatically open or close the roller blind, water valve and fan according to internal and external conditions. Waiting for large shed mechanical and electrical equipment.
3. Query function After using the mobile phone or computer to log in to the system, the farmer can query the environmental parameters, historical temperature and humidity curve, historical mechanical and electrical equipment operation record, historical photos and other information in the greenhouse (greenhouse) in real time. After logging in to the system, you can also query. Local agricultural policies, market conditions, supply and demand information, expert notices, etc., to achieve targeted comprehensive information services.
4. The warning function warning function needs to preset the upper limit value and the lower limit value of the suitable conditions. The set value can be modified according to the crop type, growth cycle and season change. When a certain data exceeds the limit, the system immediately sends a warning message to the corresponding farmer, prompting the farmer to take timely measures.
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