| 摘要 |
The invention relates to a method and an apparatus ( 4 ) for detecting the position of a sequence of markings ( 2 ) on a carrier ( 1 ) in relation to a detector ( 3 ) for detecting the markings ( 2 ). In accordance with one embodiment, the sequence of markings ( 2 ) detected by the detector are compared with at least one reference sequence ( 5 ) corresponding to the arrangement of the markings ( 2 ) on the carrier ( 1 ). In order to be able to reliably detect the position and rapidly identify errors, a comparison of a sensing sequence of markings ( 2 ) detected by the detector ( 3 ) with sections of the reference sequence ( 5 ) is carried out and an error signal is generated if the comparison does not result in complete correspondence. In this way, the function of the detector ( 3 ) can be checked particularly reliably. This method is advantageously implemented in a data processing device ( 4 ) that is present anyway, with the result that no additional components are required.
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