Method and device for vehicle measurement
A method for checking the correct positioning of a vehicle on a measuring station for vehicle measurement includes: a) taking images of at least two tires of the vehicle; b) identifying features, in the images taken, which describe at least one area of the respectively recorded tire; c) fitting a mathematical model to the identified features; d) determining the extent of the flattening of each tire from the fitted mathematical model; e) comparing the flattening of the at least two tires.
1. A method for checking a correct positioning of a vehicle on a measuring station for vehicle measurement, the method comprising:
taking images of at least two tires of the vehicle;
identifying features in the images taken, which describe at least one area of the respectively recorded tire;
fitting a mathematical model to the identified features;
determining the extent of the flattening of each tire from the fitted mathematical model;
comparing the flattening of the at least two tires;
taking at least one image of each tire of the vehicle while the vehicle is passing by;
determining turning centers of the wheels from the mathematical model; and
checking whether the turning centers of the wheels have moved in one plane while the vehicle was passing by.
2. The method of claim 1 , further comprising:
emitting a warning and/or blocking a planned vehicle measurement, if the difference in the flattening of the tires exceeds a specified boundary value.
3. The method of claim 1 , wherein the tires are each illuminated by a projector.
4. The method of claim 1 , wherein stereo images of the tires are taken using a stereo camera.
5. The method of claim 1 , wherein the mathematical model is a two-dimensional model or a three-dimensional mathematical model.
6. A device for checking a correct positioning of a vehicle on a measuring station for the vehicle measurement, using at least two sensing devices, which are each configured to take images of a tire of the vehicle, comprising:
an evaluation device configured to perform the following:
identify features in the images taken, which describe at least one area of the respectively recorded tire;
fit a mathematical model to the identified features;
determine the extent of the flattening of each tire from the fitted mathematical model; and
compare the flattening of at least two tires to one another;
taking at least one image of each tire of the vehicle while the vehicle is passing by;
determining turning centers of the wheels from the mathematical model; and
checking whether the turning centers of the wheels have moved in one plane while the vehicle was passing by.
7. The device of claim 6 , wherein the evaluation device is integrated into at least one of the sensing devices.
8. The device of claim 6 , wherein the device has four sensing devices.
9. The device of claim 6 , further comprising:
an emitting arrangement to emit a warning and/or blocking a planned vehicle measurement, if the difference in the flattening of the tires exceeds a specified boundary value.
10. The device of claim 6 , wherein the tires are each illuminated by a projector.
11. The device of claim 6 , wherein stereo images of the tires are taken using a stereo camera.
12. The device of claim 6 , wherein the mathematical model is a two-dimensional model or a three-dimensional mathematical model.
13. A device for vehicle measurement, comprising:
an arrangement for checking a correct positioning of a vehicle on a measuring station for the vehicle measurement, using at least two sensing devices, which are each configured to take images of a tire of the vehicle, the arrangement including an evaluation device configured to perform the following:
identify features in the images taken, which describe at least one area of the respectively recorded tire;
fit a mathematical model to the identified features;
determine the extent of the flattening of each tire from the fitted mathematical model; and
compare the flattening of at least two tires to one another;
taking at least one image of each tire of the vehicle while the vehicle is passing by;
determining turning centers of the wheels from the mathematical model; and
checking whether the turning centers of the wheels have moved in one plane while the vehicle was passing by.
14. The device of claim 13 , further comprising:
an emitting arrangement to emit a warning and/or blocking a planned vehicle measurement, if the difference in the flattening of the tires exceeds a specified boundary value.
15. The device of claim 13 , wherein the tires are each illuminated by a projector.
16. The device of claim 13 , wherein stereo images of the tires are taken using a stereo camera.
17. The device of claim 13 , wherein the mathematical model is a two-dimensional model or a three-dimensional mathematical model.