1. Introduction
Parking Guidance System install one ultrasonic radar detector on each parking space to detect whether there is a car or not. Then it collects every detector's working status by the guidance controllers. The guidance controllers distinguish their working modes according to the address setting from 0 to 62. 0 means the host controller( or say files center) and 1 to 62 are the sub-controllers.

Before using the system, please down the related setting information to the host PC and then the system can work offline independently.

In online status it provides real-time parking map function and report analysis functions of each parking space usage.
2. System Diagram

3. System Equipments
  1) Parking Guidance Display(Outdoor)

Carbon steel frame, black paint;
Tempered glass panels, white words are reflective films and opaque;
Mainly used for information display of spare parking spaces;
Ultra-brightness with green LED;
RS485 interface and Address can be set via DIP switch.

2) Parking Guidance Display(Indoor)

Mainly used for information display of spare parking spaces;
Ultra-brightness with green LED;
Integrated English standard font;
Arrow direction can be rotated by 45 degrees and adjustable in eight directions;
Outdoor lifting Column or holder mounted way;
RS485 interface and can display information according to ADD

  3) Parking Zone Guidance Controller

Industrial grade 32bits ARM microprocessor;
LCD menu interface,easy to use;
Integrate high-performance dual-channel loop detector processor;
Automatic direction identification function;
Automatically distinguish continuous vehicles;
Offline work, can be cut off from PC and work independently;
GPRS-DTU module can be connected to host to transmit data remotely.

  4) Parking Zone Guidance Keyboard
Connect No 1 host in the parking guidance system;
Can modify the number of free parking space on real-time;
Wall-mounted, convienient and durable.

5) Parking Guidance Controller 

Industrial grade 32bits ARM microprocessor, RTOS;
CAN bus network;
Integrating 5 line high-speed real-time RS485 bus port;
Offline work, can work independently without PC;
GPRS-DTU module can be connected to Central Control Unit(CCU)

  6) Ultrasonic Sensor

Vehicle presence real-time detection in indoor parking lots;
Adopt ultrsonic radar working principle;
Optimization engineering algorithm avoid disturbance efficiently;
RS485 bus communication;
Parking space indication: Green means no car and red means having car.