| 摘要 |
A location system for determining the position of a movable object (12) like a power wrench in a three dimensional space and comprising a number of stationary signal communication modules (15, 16 and 17) and a movable signal communication module (18) carried by the movable object (12), wherein the stationary signal communication modules (15, 16 and 17) are connected to an evaluation and calculation unit (24) which is arranged to determine the position of the movable object (12) in response to the signals delivered by the stationary signal communication modules (15, 16 and 17) and based on signals communicated between the movable signal communication module (18) and the stationary signal communication modules (15, 16 and 17). At least one (16) of the stationary signal communicating modules (15, 16 and 17) is displaceable between two or more positions (A,B) to enable signal communication contact with the movable signal communicating module (18) in normally screened off positions. |
