The System Idea:
1. The UHF long distance reader: responsible for reading the number of windshield tag. and pass the number to controller.
2. Windshield tag: it's pasted on car window as car/person unique ID.
3. Access Controller: it will judge the tag is a valie or not, then release relay output to open door/gate/barrier. It's IP65 Metal WaterProof device, It's Stand alone Device.
4. Power Unit: It provide power to the whole system.