Greenhouse Electrical Cabinet

Intelligent Control System of Greenhouse

The intelligent control system of greenhouse shed is a scientific system of intelligent management shed. This system needs corresponding induction equipment to ensure the normal operation of the system. Intelligent control system is the embodiment of applying information technology to agriculture. It is a necessary tool for the development of modern agriculture without a lot of manual operation.

Working principle

The system is shown in Figure 2-1, Figure 2-2, DHT11 temperature and humidity sensors, STC89C52 MCU for data processing, LCD1602 display module displays temperature and humidity. By the PWM control temperature regulation module, And when the temperature is less than 18℃, M4QA045 the motor stops running, And when the greenhouse is over 28℃, M4QA045 the motor runs at full speed, When the temperature is between 18℃ and 28℃, M4QA045 motor speed is controlled by PWM. STC89C52 MCU output high and low level control humidity alarm module, When the humidity is greater than 65 RH or less than 45% RH, STC89C52 MCU output high level, Humidity alarm module alarm, When the humidity is between 45% RH and 65% RH, STC89C52 MCU output low level, Humidity alarm module closed. Single chip computer through RS23 communication protocol and upper PC computer serial communication. The system can collect, process and display greenhouse environmental information independently by single chip microcomputer system, Also by the PC machine to complete the monitoring work.

Main significance

In human living environment, temperature and humidity play an extremely important role. Since the 18 th century industrial revolution, industrial development has been closely related to the ability to master temperature and humidity. In metallurgy, iron and steel, petrochemical, cement, glass, medicine and other industries, it can be said that almost 80% of the industrial sector has to consider the factors of temperature and humidity. Greenhouse technology is a good way. Greenhouse greenhouse is to establish a climate condition suitable for biological growth and create an artificial meteorological environment to eliminate the constraints of temperature on biological growth. Moreover, greenhouse can overcome the limitation of environment to biological growth, make different crops produce in unsuitable season, make season no longer have excessive influence on crop growth, and greatly reduce the dependence of crops on natural conditions. Because greenhouse can bring considerable economic benefits, greenhouse technology is becoming more and more popular, and has become the main means for farmers to increase income.

The application of automatic control and computer to realize the automation of agricultural production and management is one of the important symbols of agricultural modernization. With the rapid development of electronic technology and information technology in recent years, a revolution in greenhouse control and management technology has been brought about.

System Hardware Composition

Based on the advanced computer level of Zhejiang University, combined with the characteristics of domestic and foreign greenhouse control systems, plant R & D and design break through the technical bottleneck of greenhouse sensor / greenhouse intelligent software design and environmental facility control. The first generation intelligent control system of agricultural greenhouse is developed.

1. System Hardware Circuit Composition System Block diagram

2. Overall circuit diagram

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