The vehicle radar detector is applied to kinds of gates to realize anti-hitting and trigger function. No need to cut ground to lay complex wires which can save much time and cost; easy installation and easy operation. The microwave detector is designed for fast door/sliding door. It has direction recognition, anti-vibration, anti-interference and long detection. The vehicle motion detector is the best choice for automatic door. It is used for fast door control and can automatcially open gate for incoming vehcles in the one-way entrance/exit. Besides, it can identify vehilce's driving direction and has trigger function.