Abstract: A scanning unit is arranged to scan a scale element that is rotatable about an axis relative to the scanning unit. The scanning unit includes a circuit board, which includes a substrate having a first surface, a second surface arranged opposite the first surface, and a circumferential third surface. A transducer system is arranged on the first surface, and electronic components are mounted on the second surface. The third surface includes a plurality of concave indentations. The scanning unit furthermore includes a metal frame having an uninterrupted first recess, which is radially restricted by an inner side of the metal frame, the inner side having a plurality of inwardly projecting elements. The inwardly projecting elements engage with the concave indentations such that the substrate is fixed in place in the metal frame under mechanical tension.

Abstract: A scanning unit is arranged to scan a scale element that is rotatable about an axis relative to the scanning unit. The scanning unit includes a circuit board, which includes a substrate having a first surface, a second surface arranged opposite the first surface, and a circumferential third surface. A transducer system is arranged on the first surface, and electronic components are mounted on the second surface. The third surface includes a plurality of concave indentations. The scanning unit furthermore includes a metal frame having an uninterrupted first recess, which is radially restricted by an inner side of the metal frame, the inner side having a plurality of inwardly projecting elements. The inwardly projecting elements engage with the concave indentations such that the substrate is fixed in place in the metal frame under mechanical tension.

Abstract: A bearingless angular measurement device includes an angle scale, a scanning unit, and an evaluation electronics. The scanning unit and the angle scale are located at a scanning distance relative to each other and are rotatable about an axis, so that the scanning unit is capable of generating angle-dependent output signals, which may be further processed in the evaluation electronics. The scanning distance is able to be determined on the basis of the output signals. In addition, the angular measurement device includes a compensation coupling that is attachable to a machine component and is elastically deformable in the direction of the axis.

Abstract: A bearingless angular measurement device includes an angle scale, a scanning unit, and an evaluation electronics. The scanning unit and the angle scale are located at a scanning distance relative to each other and are rotatable about an axis, so that the scanning unit is capable of generating angle-dependent output signals, which may be further processed in the evaluation electronics. The scanning distance is able to be determined on the basis of the output signals. In addition, the angular measurement device includes a compensation coupling that is attachable to a machine component and is elastically deformable in the direction of the axis.

Abstract: A device for measuring deformations of a rotor blade of a wind turbine generator system includes an angle measuring device and an arm. The angle measuring device includes a first and a second assembly. The first assembly is pivotable relative to the second assembly about an axis. The second assembly has a fastening site that is configured to be connected to the rotor blade. The angle measuring device is configured to measure a relative angular position between the first and the second assembly. The arm has a connection site disposed at a distance to the fastening site and is configured to be connected to the rotor blade at the connection site. The arm is mechanically coupled to the first assembly at a radial distance such that, in response to a change in the distance, a relative angular displacement is generated between the first and the second assembly.

Abstract: A device for measuring deformations of a rotor blade of a wind turbine generator system includes an angle measuring device and an arm. The angle measuring device includes a first and a second assembly. The first assembly is pivotable relative to the second assembly about an axis. The second assembly has a fastening site that is configured to be connected to the rotor blade. The angle measuring device is configured to measure a relative angular position between the first and the second assembly. The arm has a connection site disposed at a distance to the fastening site and is configured to be connected to the rotor blade at the connection site. The arm is mechanically coupled to the first assembly at a radial distance such that, in response to a change in the distance, a relative angular displacement is generated between the first and the second assembly.

Abstract: A method for separating an encoder shaft of an angle encoder from a drive shaft, which are axially aligned with each other along an axial direction and are self-lockingly braced on each other by a press fit along the axial direction and a central fastening screw, which connects the encoder shaft and the drive shaft in the axial direction. A head of the fastening screw rests against an end of a bore of the encoder shaft, which receives a shank of the fastening screw, and a thread of the fastening screw is screwed into an internal screw thread of the drive shaft for bracing the encoder shaft and the drive shaft. The method includes partially turning the fastening screw out of the internal screw thread of the drive shaft and canceling the press fit by generating an axially oriented force acting between the head of the fastening screw and an end of the encoder shaft opposite the press fit.

Abstract: A method for separating an encoder shaft of an angle encoder from a drive shaft, which are axially aligned with each other along an axial direction and are self-lockingly braced on each other by a press fit along the axial direction and a central fastening screw, which connects the encoder shaft and the drive shaft in the axial direction. A head of the fastening screw rests against an end of a bore of the encoder shaft, which receives a shank of the fastening screw, and a thread of the fastening screw is screwed into an internal screw thread of the drive shaft for bracing the encoder shaft and the drive shaft. The method includes partially turning the fastening screw out of the internal screw thread of the drive shaft and canceling the press fit by generating an axially oriented force acting between the head of the fastening screw and an end of the encoder shaft opposite the press fit.

Abstract: A rotary encoder including a housing having a wall which forms a bottom of the housing and has a center and at least one opening, a cover for closing the at least one opening, with the housing wall having an attachment region which encloses the wall center and has at least one attachment point at which the cover is attached to the housing wall, and a fastening element for securing the cover to the housing wall and rotatable at the attachment region to provide for connection of the fastening element with the at least one attachment point.

Abstract: A rotary encoder including a housing having a wall which forms a bottom of the housing and has a center and at least one opening, a cover for closing the at least one opening, with the housing wall having an attachment region which encloses the wall center and has at least one attachment point at which the cover is attached to the housing wall, and a fastening element for securing the cover to the housing wall and rotatable at the attachment region to provide for connection of the fastening element with the at least one attachment point.

Abstract: A scanning graduation that scans a scale along a measuring direction to produce a signal representative of a position measurement value. The scanning graduation includes a particular transmission function which generates a filtering function when scanning the scale, wherein the transmission function is determined by a quantity of harmonics to be suppressed in the signal. The scanning graduation includes at least one scanning element for scanning a graduation period of the scale. The at least one scanning elements have at least one track comprised of N sub-elements, which are offset from one another in a measurement direction within a graduation period of the scanning graduation and whose effective widths b.sub.i (i=1 to N) within the graduation period are matched to their position within the graduation period so that the Fourier coefficients of the transmission function associated with the harmonics to be suppressed are minimized.