| 摘要 |
The invention relates to a method of determining geometrical dimensions of a tyre, especially of an inner surface of the tyre and/or a tyre bead, by contact-less sensing, wherein the tyre (12) is received in a receiving means (10), wherein at least one light beam is emitted onto a peripheral area of the tyre surface (23, 24), especially on an inner surface (23) of the tyre (12) and/or on a tyre bead (24), wherein the light beam reflected at the impingement area is detected and the directions of the emitted and reflected light beams are evaluated for determining the shape and/or position of the respective impingement area on the tyre (12). Furthermore, the invention relates to an apparatus for determining the geometrical dimensions of a tyre comprising at least one sensing device (22) and a computer-aided evaluation arrangement (32), wherein the evaluation arrangement (32) is suitable for determining the position of the location sensed by the light beam on the tyre surface (23, 24) from the directions of the emitted light beam and the reflected light beam.
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