| 摘要 |
A movement of an object is recognised as a predetermined movement, by transmitting signals between transmitter-receiver pairs, which are reflected from the object. A first event is recorded for one of the transmitter-receiver pairs if a reflected signal meets a predetermined proximity criterion, and a second event is recorded for a second transmitter-receiver pair if after the first event, a subsequent reflected signal meets a predetermined proximity criterion. The first and second events are used to identify the movement.
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