METHOD AND SYSTEM FOR LOCATING AN OBJECT ON A SURFACE

摘要

A method of locating an object (3;42) placed on a surface (2:24) includes identifying normally clear lines of sight blocked by the object (3:42) by evaluating responses of the receivers of at least some of pairs of a transmitter and a receiver able to detect a signal from the transmitter. At least one element of one of the pairs of which the response of the receiver is evaluated is included in a further object (6;32), which is movable across the surface (2;24).