car parking system

Main Functions and Features of led indicator:
1) Show the parking information to the driver by its color, it willturn from green to red when it occupied, or it will keep green
2) Install LED indicator in the front of car park space for the convenience of driver's observation.

How parking guidance systems/car parking system work
Firstly, UD takes use of ultrasonic wave to detect the car space to see if it is occupied by vehicles and transfer relative command to LED indicator which will turn from green to RED when occupied, or it will keep GREEN;
Meanwhile, the UD transmit its status message to ZCU immediately, and ZCU will collect and forward the information to CCU;
CCU processes these data and sends the relevant command to ZCU and LED panel