The Global Positioning System (GPS) is a high-precision radio navigation positioning system based on artificial earth satellites, which can provide accurate geographical location, speed and precise time information anywhere in the world and in near-earth space. GPS is not only the patron saint of cars, but also the wise star of logistics industry management. GPS is a new generation of satellite navigation and positioning system with all-round real-time three-dimensional navigation and positioning functions at sea, on land and in the air, which has been developed by the United States since the 1970s and spent 20 years and US$20 billion to complete in 1994.
Reversing radar, i.e. "reversing anti-collision radar", also called "parking assistance device", mainly consists of ultrasonic sensors, controllers and displays and other components.
The navigation system is usually a collection of basic functions, including: "positioning", "destination selection", "route calculation" and "route guidance". path guidance". The system also offers a colour map display in its higher performance range. All these functions require a digital map of the road network, which is usually stored on a CDROM.