Agricultural greenhouses provide a new production environment for modern agriculture and have achieved good economic and social benefits. It can increase the income of farmers, increase the level of industrialization, increase the ability to withstand natural disasters, prolong the growth of crops, and increase crop yields. With the continuous development of the greenhouse economy, the automatic monitoring and control of greenhouse temperature, humidity, carbon dioxide concentration, etc. have also been correspondingly developed. Combining the configuration software of Zijinqiao Software, the IPC can make its due contribution to the development of modern agriculture and enable greenhouses to be controlled by modern computer technology and improve economic efficiency.
Its application computer system must take into account the characteristics of agriculture:
1, the entire system costs low, easy maintenance
2, simple operation, easy to learn and use
3, strong anti-interference, can adapt to the humid environment of the greenhouse and the fluctuation of the rural power grid
4, can adjust the installation position and method of the system at any time
5, The performance is stable, reliable Therefore in the application in agriculture must consider the economy of the system first, secondly must consider its ease of use, then its stability. Based on the above basic principles, we have designed the following software and hardware solutions:
Project Plan Remarks Computer EVOC IPC EVOC P4 Level Machine Software Zijinqiao Configuration Software Acquisition Module Data Acquisition Module Series Module Temperature Sensor Mature Industrial Product Humidity Sensor Mature Industrial Product
CO2 Concentration Monitoring Mature Industrial Products Choose Valves as Needed Mature Industrial Products Switch Mature Industrial Products Power Modules Mature Industrial Products Light Monitoring Select as needed
PH monitoring Select according to need
485 bus ordinary twisted pair
For the characteristics of the agricultural industry, the system uses 485 bus to connect the acquisition modules through the 485 bus. The company's modules use a built-in microcontroller that allows smart device communication from the sensor to the computer interface. Module configuration, installation has a very high flexibility. The 485 communication network is used between the modules. There are 255 modules in the system. The maximum distance between the modules can reach 1200 meters. The communication line can be as cheap as a twisted pair cable. The module is small in size and offers a variety of mounting methods. The rails can be installed in cascades. The power supply of the modules can be supplied in a wide range of 10-30 VDC. Even if the voltage changes brought by long-distance power supply can be overcome, they can be powered by a total of 24 V power supply, and no power supply is needed at the installation site. These characteristics of the module can well meet the needs of automation systems in agricultural greenhouses.
Its networking is as follows:
The configuration software provides users with complete computer display, control and management functions throughout the system. Through the integration with the acquisition control system, the system mainly completes the following functions:
1. Data collection and display: The EVOC IPC collects various signals in real time and displays various types of signals on the computer in real time, enabling managers to know production information in a timely manner.
2, status alarm and processing: according to the set alarm conditions, the occurrence of various abnormal conditions alarm, prompting the operator to deal with. If the temperature is too high or too low, including exceeding the set value range, abnormal rate of change, etc. can be alarm and generate a historical record.
3, the computer's automatic control: You can control the temperature and humidity. If the temperature is too low, the heating furnace can be heated. If the temperature is too high, ventilation or other methods can be used. If the humidity is too low, the spray system can be activated. If the humidity is too high, the exhaust fan can be used to draw out the air with high humidity. At the same time can be CO2, light, drip irrigation and other automatic control. According to the needs of users, different crops and different periods of time use different control indicators and control methods.
4, information analysis and management: can be real-time, historical data management, with curves, reports and other ways to view. At the same time, the user can specify the conditions for the query.
5, remote management and control. The system can be remotely managed and controlled through a computer network system. (This function is selected according to user needs)