| 摘要 |
The data carriers (T I, T 2 , T 3 , T 4 ) of those objects ( 1, 2, 3, 4 ) whose presence is to be checked, are allocated to a check group (ÜG), in a method of checking the presence of objects characterized by noncontact readable data carriers, wherein each noncontact readable data carrier can be identified uniquely or in groups. Data carriers (T 1 to T 6 ) are detected by data carrier reading means ( 5 ) and it is detected whether at least one of the detected data carriers (T 1 to T 6 ) is allocated to an activation group (AG). If at least one of the detected data carriers (T 4 , T 5 ) is allocated to the activation group (AG), the presence check is activated, while it is checked during the presence check whether all the data carriers (T 1 to T 4 ) allocated to the check group (ÜG) are detected by the data carrier reading means ( 5 ) and, if not, an alarm signal (AL) is transmitted.
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