Linear device for measuring distance and/or displacement in hexapod type system, has interface part connecting position coding element and another fixing interface to maintain distance between coding element and fixing interface

摘要

The device has a set of bodies (1, 2) that is ready to move in translation in relation to one another. A set of ends of the bodies is terminated by a set of fixing interfaces (3, 4). A position encoder includes a position coding element (5) i.e. graduated ruler, that is mechanically interdependent of one of the fixing interfaces. An interface part (7) connects the position coding element and another fixing interface to maintain a distance (D) between the coding element and the latter fixing interface, where variation of distance primarily depends on thermal dilation of the interface part. An independent claim is also included for a system for measurement of position and/or space displacement of a machine element with regard to another machine element.