Its full name in English is ParkingDistanceControl, which translates into scientific parking distance control system and is called parking radar by automobile professionals. The working principle of PDC system is that radar detectors is usually installed on the rear bumper or front bumper of an automobile to detect the front and rear obstacles and help drivers "see" the front and rear obstacles or the distance from other cars when parking. This device can not only facilitate parking, but also protect the car body from being scratched. PDC uses ultrasonic sensors to detect the distance from the nearest obstacle to the car, and sends out sirens to warn the driver. The control of siren is usually divided into two stages. When the distance of the vehicle reaches a certain initial detection distance, the siren starts to sound with a certain high-frequency siren, and when the vehicle is closer to a certain distance, the siren becomes a continuous siren to inform the driver. The advantage of PDC is that the driver can get the information of obstacles or the distance of other cars through hearing. PDC system is mainly used to assist parking, so when it reaches or exceeds a certain speed, the system function will be turned off.
Now the new car has begun to use the digital PDC reversing radar system without blind spots. For example, Ming Rui, which was listed shortly this year, adopted this digital sensor design, thus realizing real blind spot detection and sound and image double warning (on the display screen of the radio panel). The working principle of digital PDC reversing radar without blind area is that when it is engaged in reverse gear, the PDC system will start automatically, and four ultrasonic sensors embedded in the rear bumper of the car will start to detect the obstacles behind it.