| 摘要 |
For monitoring trolleys (3) at a check-out facility for contents, a trolley (3) in a monitoring position is detected and it is detected whether an article (15, 16, 19) is carried by that trolley (3) by comparing detection signals with at least one rule; and by generating an article present signal if the detection signals meet the rule or rules. The action of detecting the trolley (3) includes detection of a range to the trolley (3) and detecting whether an article (15, 16, 19) is carried by that trolley (3) includes detection of a range to the article (15, 16, 19). The detection signals which are compared include ranges, an article present signal being generated in response to the ranges being in accordance with the rule or rules. A system for carrying out that method is described as well.
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