. Install LED indicator in the front of car park space for the convenience of drivers observation. . Show the parking information to the driver by its color, it will turn from green to red when it occupied, or it will keep green . One park space needs one LED indicator.
Free Handicapped Occupied
2.How Parking Guidance LED Works: 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.