How Does a Parking Sensor Judge Distance?

[McAlexa]

Parking sensors determine distance through sound waves. A parking sensor system consists of ultrasonic sensors, a controller, and a display. It operates on the principle of ultrasonic distance measurement. Under the control of the controller, the sensors emit ultrasonic signals. When these signals encounter an obstacle, they generate echo signals. The sensors receive these echo signals, which are then processed by the controller to determine the obstacle's position. The distance is displayed on the screen, and a warning signal is issued. The primary function of parking sensors is to automatically activate during reversing, allowing the driver to know if there are obstacles behind the vehicle without turning their head. This alerts the driver to brake promptly or reduce reversing speed, helping to prevent accidents.