POSITION DETERMINING SYSTEM

摘要

The invention relates to position determining system (201) for determining a position of an object (2). A first position detection unit (205) detects a first position of the object (2) based on radiation transferred between the object (2) and transfer positions being known relative to a reference position by a sending and receiving unit (203, 214, 216, 217). A second position detection unit (35) detects a second position based on an acceleration of the object (2) and the determined first position, wherein an output unit (12) outputs at least one of the first position and the second position. If the transfer of radiation is interrupted, the second position can be output by the output unit. Moreover, the first position can be used as an initial value for determining the second position or to update the second position. This improves the quality of determining the position of the object.