DEVICE FOR DETERMINING THE POSITION OF AN OBJECT WHICH IS MOVABLE ALONG AT LEAST ONE MOVEMENT DIRECTION

摘要

The invention refers to a device for determining the position of an object which is movable along at least one movement direction, wherein a linear measuring device for measuring the position of the object along the respective spatial direction is assigned to one or each displacement direction, with at least one scale (20, 30) extending along a displacement direction (x, y) of the object to be measured (10) as a first component of the respective linear measuring device (2, 3); with a scan head (25, 35) for scanning the scale (20, 30) as a second component of the respective linear measuring device (2, 3), such that a change in the position of the scale (20, 30) can be detected relative to the scan head (25, 35) along the assigned displacement direction (x, y) of the object to be measured (10), wherein one of the two components (20, 25; 30, 35) of the respective linear measuring device (2, 3) is moved together with said object, when the object to be measured (10) moves along the respective displacement direction (x, y); and with a device (12, 23; 13, 33) for determining the distance from the components (20, 30) of the respective linear measuring device (2, 3) that move together with the object to be measured (10), to the object to be measured (10), along the measuring direction (x, y) of the assigned linear measuring device (2, 3). According to the invention, the device (12, 23; 13, 33) for determining the distance from the components (20, 30) of the respective linear measuring device (2, 3) that move together with the object to be measured (10), to the object to be measured (10), consists of a measuring graduation (12, 13) as a first structural component and an assigned measuring head (23, 33) as a second structural component, wherein one of the two structural components (12, 29; 13, 39) is provided at the object to be measured (10), and the other structural component (12, 23; 13, 33) is provided at the components (20, 30) of the linear measuring device (2, 3) that move together with the object to be measured (10).