parking space detection
1. Central controller of parking guidance system:
1) main functions: CCU main function is to inquire about the relevant ZCU data via RS232--NODE by turns and process these data; Then send these processed data to PC or other relevant equipment; Besides it updates the LED displays data via RS-232-NODE.
One CCU can control 60 ZCU in max.

2. How parking guidance system 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.
3. PRODUCT DETAIL
Type: Carport
Place of Origin: Fujian, China
Brand name: Keytop
Model Number: Keytop-c01
Principle: Ultrasonic
Work temperature: -20C---+80C
Frequency: 50-60Hz
Rate voltage: AC110-220V
Baud Rate: RS-232-NODE: 9600bp; RS-232-PC: 57600bps
COM1: To ZCU
Voltage: DC5V
Available distance: