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A parking assistance system (PDC – Park Distance Control) typically works with ultrasonic sensors that are installed in the vehicle’s bumper. These sensors help the driver detect obstacles early while parking and avoid collisions.
In a classic parking assistance system with parking sensors, there are usually four sensors in the rear bumper. In more advanced systems, additional sensors can also be installed at the front, allowing obstacles to be detected both when moving forward and when reversing.
How parking sensors work
The sensors continuously emit ultrasonic pulses. As soon as these sound waves hit an obstacle—such as another vehicle, a wall, or a bollard—they are reflected and received again by the sensor.
The control unit of the PDC parking assistance system calculates the exact distance to the obstacle based on the time the signal needs to travel to the obstacle and back.
The closer the vehicle gets to an object, the faster the warning signals are emitted.
How is the driver warned?
As soon as an obstacle is detected, the system informs the driver in several ways:
- acoustic signals (beeping sounds) that become faster the closer the obstacle is
- visual display on a screen
- display in the vehicle display or infotainment system
In some systems, the distance is also displayed graphically, allowing the driver to immediately see on which side the obstacle is located.
Activation of the parking assistance system
Most parking sensor systems are activated automatically as soon as the reverse gear is engaged. In vehicles with front sensors, the system is often also activated when driving forward slowly or by pressing a button.
Retrofitting a parking assistance system
Many vehicles can easily be retrofitted with a parking assistance system. Modern parking sensor retrofit kits are suitable for numerous models and can be installed either as universal systems or as vehicle-specific solutions.
If you are unsure which system is suitable for your vehicle, we will be happy to advise you.
Simply contact us via our contact form.