Design and Technology – Energy and control systems | e-Consult

A semi-automatic control system for a greenhouse temperature would involve a combination of manual intervention and automated regulation. Input would be the desired temperature setpoint, entered by the user (e.g., via a dial or digital interface). The output would be the control mechanism for the ventilation windows – likely a motor to open and close them. Feedback is crucial; a temperature sensor (thermistor or thermocouple) would continuously measure the actual greenhouse temperature. This feedback signal would be compared to the setpoint. Amplification isn't strictly required in the traditional electronic sense, but the control logic itself could be considered an amplification of the difference between the setpoint and the actual temperature.

Components Required:

• Temperature Sensor: Measures the greenhouse temperature.
• User Interface: Allows the user to set the desired temperature.
• Control Logic Unit: This could be a microcontroller or a relay system. It compares the setpoint and the feedback temperature.
• Actuator: A motor to open and close the ventilation windows.
• Power Supply: Provides power to the system.

Interaction: The user sets the temperature. The temperature sensor provides feedback to the control logic unit. The control logic unit compares the feedback to the setpoint. If the temperature is too high, the control logic activates the motor to open the ventilation windows. If the temperature is too low, the motor closes the windows. The system operates semi-automatically because the user initiates the process and can override the automated control if necessary.