Method for detecting the theft of a vehicle

1. A method for detecting theft of a vehicle, comprising:

detecting a vehicle movement by an inductive vehicle charging system,

checking the authorization for a detected vehicle movement,

outputting a message signal if an unauthorized vehicle movement is detected,

determining that a vehicle positioning process is complete and that the vehicle charging process has started, and

after determining that a vehicle positioning process is complete and that the vehicle charging process has started, start checking of the authorization for a detected vehicle movement.

2. The method as claimed in claim 1 , in which, in order to detect the vehicle movement, a measured coil current or a measured voltage of the inductive vehicle charging system is evaluated.

3. The method as claimed in claim 1 , in which an impedance of the inductive vehicle charging system is evaluated in order to detect the vehicle movement.

4. The method as claimed in claim 1 , in which the vehicle movement is detected on the basis of foreign object detection of the inductive vehicle charging system.

5. The method as claimed in claim 1 , in which the vehicle movement is detected on the basis of living object detection of the inductive vehicle charging system.

6. The method as claimed in claim 1 , in which the vehicle movement is detected on the basis of an evaluation of the output signals from positioning sensors.

7. The method as claimed in claim 1 , in which an acoustically perceptible and/or a visually perceptible alarm signal is output as the message signal.

8. The method as claimed in claim 7 , in which the alarm signal is output to an alarm transmitter arranged in the vehicle and/or an alarm transmitter arranged on the charging station of the inductive vehicle charging system and/or to a mobile communication device and/or to an alarm system.

9. The method as claimed in claim 1 , in which an immobilizer arranged in the vehicle is notified when an unauthorized vehicle movement is detected.

10. The method as claimed in claim 1 , in which the coupling relationship between a primary side and a secondary side of the inductive vehicle charging system is evaluated in order to detect a vehicle movement.

11. The method as claimed in claim 1 , in which magnetic field changes on the vehicle side of the inductive vehicle charging system are evaluated in order to detect a vehicle movement.

12. An inductive vehicle charging system adapted to detect theft of a vehicle according to the method of claim 1 .

13. A method for detecting theft of a vehicle, comprising:

detecting a vehicle movement by an inductive vehicle charging system,

checking the authorization for a detected vehicle movement,

outputting a message signal if an unauthorized vehicle movement is detected,

determining that a vehicle positioning process is complete and that the vehicle charging process has started,

after determining that a vehicle positioning process is complete and that the vehicle charging process has started, start checking of the authorization for a detected vehicle movement, and

continuing the checking of the authorization for the detected vehicle movement after the vehicle charging process has ended and until an authorized vehicle movement is detected.

14. A method for detecting theft of a vehicle, comprising:

detecting a vehicle movement by an inductive vehicle charging system,

checking the authorization for a detected vehicle movement,

outputting a message signal if an unauthorized vehicle movement is detected,

determining that a vehicle positioning process is complete and that the vehicle charging process has started,

after determining that a vehicle positioning process is complete and that the vehicle charging process has started, start checking of the authorization for a detected vehicle movement, and

detecting an authorized vehicle movement after the vehicle has been started by a vehicle-specific vehicle key and/or after release by a release signal output by a communication device.