Abstract: The invention relates to a screw load testing device that includes a housing configured to support a screw and a mating element that is formed as a threaded nut and is positioned to interact with a threaded portion of the screw. The screw load testing device housing includes a measuring device for detecting an axial force acting on the screw and/or for detecting a torque acting on the screw. A first housing member is configured to interact at least indirectly with a portion that is in monolithic connection to the screw. A second housing member is configured to interact with the threaded nut, and the two housing members are arranged movably relative to each other at least in the direction of a longitudinal axis.

Abstract: A method for detecting a change in position of at least one first marker or reference star relative to a first object, wherein the marker or reference star is attached to the first object. A position of at least one first characteristic point of the first object is ascertained via the first marker or reference star, and a position of at least one first characteristic point of a second object connected to the first object is ascertained. It is determined from the ascertained position of the at least two characteristic points whether the position of the at least one first marker or reference star has changed relative to the first object.