UD(ultrasonic detector) as one of the main part of parking guidance system makes use of ultrasonic to detect the parking space then feedback to ZCU or other equipments by RS485.
One parking space needs one UD which should be installed in the middle of the car park space.
ZCU: Zone Control Unit
CCU: Central Control Unit
UD: Ultrasonic Detector
LED Indicator: Red/Green
Led Indicator LED screen: Outdoor/Indoor LED screen