To prevent disease transmission, a commercial poultry farm uses an automated bio-security disinfection portal at its entry boundary.
The portal control system consists of:
- An ultrasonic distance sensor to detect an approaching vehicle.
- An RFID transponder reader to read the unique ID tag mounted on the vehicle's windshield.
- A local database of approved delivery contractors with valid sanitation clearance.
- An actuator connected to a solenoid valve that controls the high-pressure disinfectant spray nozzles.
Describe what the control system does when the ultrasonic distance sensor detects an arriving vehicle.