Parking assistance system, method for operating a parking assistance system, computer program, computer-readable medium and motor vehicle

1. A parking assistance system for a motor vehicle, comprising:

a sensor device that is configured to measure a distance of the motor vehicle from an object and an intrinsic speed of the motor vehicle; and

a warning device having a computing device, the warning device configured to:

ascertain a relative speed of the motor vehicle in relation to the object from the measured intrinsic speed and the measured distance,

compare the measured distance with a distance threshold value,

output a warning signal if the measured distance drops below the distance threshold value, and

adapt the distance threshold value taking the measured intrinsic speed and the ascertained relative speed of the motor vehicle in relation to the object into account.

2. The parking assistance system according to claim 1 , wherein the warning device is further configured to set the distance threshold value higher as the measured intrinsic speed increases.

3. The parking assistance system according to claim 1 , wherein the warning device is further configured to adapt the distance threshold value in dependence of a function of the intrinsic speed.

4. The parking assistance system according to claim 1 , wherein the warning device is further configured to activate further function groups of the motor vehicle if there is a drop below the distance threshold value.

5. The parking assistance system according to claim 1 , wherein the warning device is configured to adapt the distance threshold value taking an ascertained response latency of the vehicle driver into account.

6. The parking assistance system according to claim 1 , wherein the sensor device comprises a radar sensor.

7. A method for operating a parking assistance system for a motor vehicle, comprising:

measuring a distance of the motor vehicle from an object and an intrinsic speed of the motor vehicle;

ascertaining a relative speed of the motor vehicle in relation to the object from the measured intrinsic speed and the measured distance;

adapting a specified distance threshold value taking the measured intrinsic speed and the ascertained relative speed of the motor vehicle in relation to the object into account;

comparing the measured distance with a specified distance threshold value; and

outputting a warning signal if the measured distance drops below the adapted distance threshold value.

8. The method according to claim 7 , wherein adapting the distance threshold value comprises adapting in dependence of a function of the intrinsic speed.

9. The method according to claim 7 , wherein the method is executed with a parking assistance system.

10. A non-transitory computer readable medium embodying a computer program product, said computer program product comprising:

an operating program for operating a parking assistance system for a motor vehicle, the operating program configured to:

measure a distance of the motor vehicle from an object and an intrinsic speed of the motor vehicle;

ascertaining a relative speed of the motor vehicle in relation to the object from the measured intrinsic speed and the measured distance;

adapt a specified distance threshold value taking the measured intrinsic speed and the ascertained relative speed of the motor vehicle in relation to the object into account;

compare the measured distance with a specified distance threshold value; and

output a warning signal if the measured distance drops below the adapted distance threshold value.

11. A motor vehicle comprising a parking assistance system according to claim 1 .

12. The method according to claim 7 , wherein the operating program is configured to adapt the distance threshold value comprises adapting in dependence of a function of the intrinsic speed.

13. The method according to claim 7 , wherein the function is a linear function.

14. The method according to claim 7 , wherein the function is a squared function.