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What is a smart greenhouse ?
Smart greenhouse is a modern automated greenhouse, which refers to the automatic greenhouse and other automatic facilities equipped with computer-controlled movable skylights, shading systems, thermal insulation, wet curtains, fan cooling systems, spray drip irrigation systems or drip irrigation systems, and mobile seed beds. High-tech "smart" greenhouse. The control of the intelligent greenhouse is generally composed of three parts: a signal acquisition system, a central computer, and a control system.
Factors such as temperature, humidity, light intensity, and soil temperature and moisture content in the greenhouse play a key role in the growth of greenhouse crops. The greenhouse automatic control system designed and developed by Shijiazhuang Hengbida Technology Co., Ltd. is based on PLC and uses computer distributed network control structure to control the air temperature, soil temperature, relative humidity, CO2 concentration, soil moisture, light intensity, water in the greenhouse. Parameters such as flow rate and pH value are automatically adjusted and detected in real time to create a better environment for plant growth, so that the environment in the greenhouse is close to the ideal value artificially imagined to meet the needs of greenhouse crop growth and development. Suitable for seedling breeding, high-yield planting, cultivation of precious and rare flowers, etc., to increase the production of greenhouse products and improve labor productivity. It is a successful example of high-tech achievements serving modern agriculture for large-scale production.
Computer operators input the computer according to the data and control parameters required for planting crops, and the system can realize unmanned automatic operation. The various data collected by the computer are accurately displayed and statistics, which provides a reliable basis for expert decision-making. The control cabinet is provided with manual and automatic switching switches, and manual control operations can be performed when necessary.
The greenhouse automatic control system is based on the information collected by sensors such as temperature and humidity , soil moisture, and soil temperature in the greenhouse, and uses RS485 bus to send the sensor information to the converter, which is displayed on the host computer for display, alarm and query. The monitoring center displays and stores the received sampling data in the form of a table, and then compares it with the set alarm value. If the actual measured value exceeds the set range, an alarm or voice alarm is displayed on the screen and the record is printed. At the same time, the monitoring center can send control instructions to the on-site controller, and the monitor controls the fan, water pump and other equipment to perform cooling and dehumidification operations according to the instructions to ensure the growth environment of the crops in the greenhouse. The monitoring center can also activate the sound and light alarm device on the on-site monitor through the alarm instruction, and notify the greenhouse management personnel to take corresponding measures to ensure that the environment in the greenhouse is normal.
Application of Internet of Things technology in smart greenhouse:
In fact, the Internet of Things technology is the aggregation and integration of various sensing technologies, modern network technologies, and artificial intelligence and automation technologies.
In the greenhouse environment, a single greenhouse can use the Internet of Things technology to become a measurement control area of a wireless sensor network . Different sensor nodes and nodes with simple actuators, such as fans, low-voltage motors, valves, etc., with low operating current, are implemented. Organization, forming a wireless network to measure substrate humidity, composition, pH value, temperature and air humidity, air pressure, light intensity, carbon dioxide concentration, etc., and then through model analysis, automatically regulate the greenhouse environment, control irrigation and fertilization operations to obtain plant growth Suitable conditions.
For agricultural parks with greenhouses, the Internet of Things can also realize automatic information detection and control. Equipped with wireless sensor nodes, each wireless sensor node can monitor various environmental parameters. By receiving the data from the wireless sensor convergence node for storage, display and data management, it can achieve the acquisition, management, analysis and processing of the test information of all bases, and display it to users in each greenhouse in an intuitive chart and curve manner. At the same time, according to the needs of planting plants, various sound and light alarm information and short message alarm information are provided to realize intensive and networked remote management of the greenhouse.
In addition, IoT technologies can be applied to different stages of greenhouse production. In the stage when the greenhouse is ready to be put into production, by placing various sensors in the greenhouse, it is possible to analyze the internal environment information of the greenhouse in real time, so as to better select suitable varieties for cultivation; in the production stage, employees can use the Internet of Things technology to collect the temperature in the greenhouse. Various types of information such as temperature, humidity, etc. are used to achieve fine management. For example, the opening and closing time of the shading net can be sensed and controlled according to the temperature and light in the greenhouse. The heating system startup time can be adjusted based on the collected temperature information. After the product is harvested, you can also use the information collected by the Internet of Things to analyze the plant performance and environmental factors at different stages and feed it back to the next round of production, so as to achieve more accurate management and obtain higher quality products.
Development Trend of Intelligent Greenhouse Monitoring and Control System:
The application of the Internet of Things technology in the greenhouse can achieve the purpose of improving product quality, regulating the growth cycle, and improving economic benefits, especially the efficient and accurate greenhouse management. For large-scale greenhouse facilities, if manipulating the environmental conditions in the greenhouse by manpower requires a lot of manpower and time, and there are unavoidable human errors. If you apply the Internet of Things technology, you only need to click the mouse to complete the manual operation in a short time, and it is very rigorous. This is also an important reason for the industry to be optimistic about the application of the Internet of Things in modern agriculture.
With the popularization of the Internet of Things technology, ordinary users can receive accurate real-time collected sensor data at any time through a computer or mobile phone, and they can also observe the overall situation of the greenhouse by remotely controlling the video sensor in the greenhouse. After the product is released from the garden, the corresponding barcode can be used to retrieve the circulation process at any time. The industry generally believes that the intelligent monitoring system for the Internet of Things agriculture will be more widely used in facility agriculture .
May 31, 2017
Chengdu Xinxin Electronic Technology Co., Ltd. Editorial Department
Editor: Little Devil in Gourd