Abstract: A method for capturing and measuring translation and/or rotation of a component moving relative to a reference system includes providing a marker on the component and providing a measurement system having a camera arranged in the reference system. The marker has at least three points which do not lie on a straight line on an upper side of the marker and the camera has an evaluation unit and memory that stores a geometry of the upper side including the at least three points. The camera is aligned with the at least three points and a first image of the marker located in a first portion is captured and stored and a second image of the marker in a second position that is different than the first position is stored. Also, translation and/or rotation of the component in three-dimensional space between the first position and the second position is calculated.

Abstract: A method of determining position and orientation of an object using a profilometer. A measurement body has a predetermined polyhedral basic form and a defined spatial relationship with the object. The profilometer captures rectilinear coordinates of at least three measurement points lying on a profile line defined by a profilometer scan-line. Using the coordinates and measurement body geometric values, rotations of the measurement body are calculated about a measurement body z-axis, an intermediate y-axis resulting from the z-axis rotation, and about a profilometer-defined x-axis. Next, three translation displacements of the measurement body relative to the three profilometer-defined axes are calculated using the coordinates, the geometric values of the measurement body, and the above-calculated rotations. The position and an orientation of the object is determined by then applying the defined spatial relationship of the measurement body to the object.

Abstract: A method for capturing and measuring translation and/or rotation of a component moving relative to a reference system includes providing a marker on the component and providing a measurement system having a camera arranged in the reference system. The marker has at least three points which do not lie on a straight line on an upper side of the marker and the camera has an evaluation unit and memory that stores a geometry of the upper side including the at least three points. The camera is aligned with the at least three points and a first image of the marker located in a first portion is captured and stored and a scond image of the marker in a second position that is different than the first position is stored. Also, translation and/or rotation of the component in three-dimensional space between the first position and the second position is calculated.

Abstract: A method of determining position and orientation of an object using a profilometer. A measurement body has a predetermined polyhedral basic form and a defined spatial relationship with the object. The profilometer captures rectilinear coordinates of at least three measurement points lying on a profile line defined by a profilometer scan-line. Using the coordinates and measurement body geometric values, rotations of the measurement body are calculated about a measurement body z-axis, an intermediate y-axis resulting from the z-axis rotation, and about a profilometer-defined x-axis. Next, three translation displacements of the measurement body relative to the three profilometer-defined axes are calculated using the coordinates, the geometric values of the measurement body, and the above-calculated rotations. The position and an orientation of the object is determined by then applying the defined spatial relationship of the measurement body to the object.

Abstract: An actuation device for machine elements having wear-induced play, especially for brakes in rail vehicles, has an actuating piston-cylinder unit which generates actuation force and has a piston rod. The piston rod cooperates with a readjusting device which compensates for play caused by wear and which supplies the actuation force to the machine element to be actuated such that wear play is compensated. The readjusting device comprises a hydraulic piston-cylinder unit which carries out the wear play readjustment through the extension of an adjusting piston. To actuate the adjusting piston, a sensor element detects the wear-induced play and, when a threshold amount of wear-induced play is reached, opens a valve which admits a hydraulic medium to the readjusting piston-cylinder unit by utilizing the operating pressure of the actuating piston-cylinder.

Abstract: In a twist selector grip for selecting pedal cycle gear ratios, the rotary movement of the grip (3) is converted to a longitudinal movement of a tension member (2). The tension member (2) is fastened to the grip (3) and wound, similar to a screw thread, about the pedal cycle handlebar (1) or a sleeve (4) enclosing it. The tension member (2) is guided in a longitudinal guide (5) fixed in position relative to the pedal cycle handlebar (1) at a relatively great distance, in the direction of the rotation axis of the grip (3), from the fastening point (6) of the tension means (2) to the grip (3). By this construction, the arcuate distance the fastening point (6) travels, upon rotation of the grip (3), is significantly greater than the travel of the tension means (2) in its longitudinal guide (5), whereby a favorable conversion of large rotational movements of the grip (3) into small longitudinal movements of the tension means (2) is achieved.