Abstract: An apparatus for angle measurement that includes a graduation carrier with a code track disposed concentrically to a center point of the graduation carrier. The apparatus includes a first scanning unit having a first interface and a second scanning unit having a second interface, wherein the first and second scanning units ascertain angle values of the graduation carrier by scanning the code track. The apparatus further includes a control unit having: 1) a device interface that is in communication with a follower electronics unit, 2) a control unit interface that is in communication with the first and second interfaces and 3) a processing unit. By which the processing unit, angle values of the first and second scanning units can be requested and processed into a corrected angle value, and the corrected angle value can be transmitted to the follower electronics unit via the device interface.

Abstract: An apparatus for angle measurement that includes a graduation carrier with a code track disposed concentrically to a center point of the graduation carrier. The apparatus includes a first scanning unit having a first interface and a second scanning unit having a second interface, wherein the first and second scanning units ascertain angle values of the graduation carrier by scanning the code track. The apparatus further includes a control unit having: 1) a device interface that is in communication with a follower electronics unit, 2) a control unit interface that is in communication with the first and second interfaces and 3) a processing unit. By which the processing unit, angle values of the first and second scanning units can be requested and processed into a corrected angle value, and the corrected angle value can be transmitted to the follower electronics unit via the device interface.

Abstract: A field-modulating angular position measuring device includes a scanning device, a measuring graduation, and evaluation electronics, the scanning device and the measuring graduation being arranged at a scanning distance rotatably relative to each other, and angle-dependent output signals being producible by the scanning device, which may be processed further in the evaluation electronics. The angular position measuring device furthermore has a unit for determining the signal amplitudes of the output signals. The angular position measuring device furthermore includes a temperature sensor, which is able to determine a temperature in the angular position measuring device. The angular position measuring device is configured such that the scanning distance may be determined on the basis of the temperature and the signal amplitudes. Furthermore, a method for operating such an angular position measuring device makes it possible, e.g., to determine a change in length of a shaft.

Abstract: A field-modulating angular position measuring device includes a scanning device, a measuring graduation, and evaluation electronics, the scanning device and the measuring graduation being arranged at a scanning distance rotatably relative to each other, and angle-dependent output signals being producible by the scanning device, which may be processed further in the evaluation electronics. The angular position measuring device furthermore has a unit for determining the signal amplitudes of the output signals. The angular position measuring device furthermore includes a temperature sensor, which is able to determine a temperature in the angular position measuring device. The angular position measuring device is configured such that the scanning distance may be determined on the basis of the temperature and the signal amplitudes. Furthermore, a method for operating such an angular position measuring device makes it possible, e.g., to determine a change in length of a shaft.

Abstract: A system for determining a signal running time between a position measuring system and an evaluation unit. The system includes a position measuring system that has a graduation connected to a moving element, a scanning unit that scans the graduation, wherein scanning of the graduation generates signals representative of a position of the moving element and a transceiver means for generating serial data that is transmitted along a data line connected to the transceiver. The system further includes an evaluation unit connected to the data line, the evaluation unit having means for determining a signal running time between the position measuring system and the evaluation unit.

Abstract: A system for determining a signal running time between a position measuring system and an evaluation unit. The system includes a position measuring system that has a graduation connected to a moving element, a scanning unit that scans the graduation, wherein scanning of the graduation generates signals representative of a position of the moving element and a transceiver means for generating serial data that is transmitted along a data line connected to the transceiver. The system further includes an evaluation unit connected to the data line, the evaluation unit having means for determining a signal running time between the position measuring system and the evaluation unit.

Abstract: A multi-turn rotary encoder that includes a first code carrier connected with an input shaft, a scanning device that scans the first code carrier and generates an absolute position of the input shaft within one revolution, and a digital code word is present at an output of the scanning device and a second code carrier for measuring the number of revolutions of the input shaft. A reduction gear is arranged between and coupled to the first and second code carriers. The second code carrier includes a magnetic body with at least one north and south pole and a substrate with a spatial arrangement of sensor elements integrated therein, which are sensitive to magnetic fields, is associated with the magnetic body.

Abstract: A method and a device for switching between different types of output signals, wherein it is possible to generate at least two different types of output signals by the position measuring system which are transmitted to an evaluating unit. Switching between the different types of output signals takes place by one or several switching signals transmitted by the evaluating unit, which are transmitted over a supply line of the position measuring system.

Abstract: A method for position determination of a rotating drive element with the aid of a measuring system is indicated, which comprises an absolute and an incremental measuring subsystem. Here, following the start of a rotary movement, absolute position measurement values are continuously determined and transmitted to a subordinated evaluation unit until a reference marking at a known absolute position has been reached. A comparison of the measurement values, known from the continuing absolute position measurement, with the known absolute position and, if required, a necessary correction, take place at the reference marking. Thereafter the reference marking is used as the reference position for the incremental measuring subsystem, the continuously absolute position is determined on the part of the measuring system and is transmitted in digital form to the evaluation unit (FIG. 1).

Abstract: A device and method for data transmission between a transducer and a processing unit which are coupled by one or several signal transmission lines, to selectively activate at least two different modes of operation of the transducer. The device includes a comparator unit which identifies the respectively activated mode of operation by comparing signals present on at least one signal transmission line with predetermined reference signals.

Abstract: A position measuring system to determine the absolute angle position of a rotor of a motor during startup. With this absolute angle position, correct commutation for startup of the motor is provided. During later operation a high-precision incremental angle measurement is possible. For this purpose a switching unit is disposed between a rotary transducer and an evaluation unit, which is driven in such a manner that first the analog signals necessary for the determination of the absolute angle position are input to the evaluation unit and thereafter the analog signals required for incremental angle measurement are input to the evaluation unit. In order to avoid unacceptable incorrect positioning in case of incorrect switching between the first and second modes of operation, all the analog signals have an approximately equal spacing period.

Abstract: The invention concerns a device and a method for serial data transmission. In the position measuring device there is provided a memory, in which specific parameters of the position measuring device are kept. These parameters can be sent on the data line to a processing unit, by which the measurement values are transmitted during the position measurement. By receiving the parameters, the processing unit is adjusted to the connected position measuring device.