Reversing radar is ultrasonic ranging or laser ranging

The current reversing radar basically utilizes the ultrasonic ranging principle.

Reverse radar: also known as parking assistance system, or reverse computer warning system. Usually, the reversing radar by ultrasonic sensors (commonly known as probe), controller and display (or buzzer) and other three parts. The system uses ultrasonic ranging principle, under the control of the controller, the sensor transmits ultrasonic signals, when encountering obstacles, resulting in return signals, the sensor receives the return signals by the controller for data processing, to determine the location of the obstacle, by the display shows the distance and other warning signals, to get a timely warning, so that drivers back up to do in mind! "This allows the driver to be aware of the number of obstacles when backing up, and makes backing up safer and easier.