Abstract: The invention refers to an absolute value rotary encoder (100) for detecting a rotational movement of a shaft (101), comprising: a revolution counting device (3) for determining a revolution count value (U), with a Wiegand sensor (3.1), a magnetic field sensor (3.2), and a permanent-magnetic rotor unit (3.3) which is designed to be mounted co-rotatably with the shaft (101) and which is designed in such a way that a magnetic field which alternates at least four times per revolution is generated by the permanent-magnetic rotor unit (3.3) in the mounted state in the case of a uniform rotational movement of the shaft (101) at the location of the Wiegand sensor (3.1), an angular position measuring device (4) for determining a current angular position (W) of the shaft (101), and an evaluation device (5) having a non-volatile data memory (5.

Abstract: A method for calibrating a rotary encoder for capturing rotational angle position of a machine shaft. The rotary encoder includes an exciter unit which is rotationally fixed to the machine shaft, and a stationary sensor unit which interacts therewith. The method includes rotating the machine shaft to perform a rotational movement at a predefined rotational speed at a first sensor temperature, capturing a first position measured value at a first predefined rotational angle position at the first sensor temperature, heating or cooling the sensor unit to a second sensor temperature, capturing a second position measured value at the first predefined rotational angle position at the second sensor temperature, determining a first deviation between at least the second position measured value and a first desired position measured value, and correcting an output signal from the rotary encoder via the first deviation.

Abstract: A method for calibrating a rotary encoder for measuring a rotary angle position of a machine shaft. The method includes rotating a machine shaft; measuring a start measuring point with a sensor unit; activating a timer module to measure a time value; measuring an intermediate measuring point with the sensor unit; storing the actual rotary angle position of the intermediate measuring point and the time value associated therewith; measuring an end measuring point with the sensor unit; recording a time value incremented by the timer module which reflects a runtime for a rotary motion of the start to the end measuring point; calculating at least one time-dependent reference rotary angle position; calculating a deviation between the actual rotary angle position measured and the at least one time-dependent reference rotary angle position calculated for at least one time value; and correcting an output signal from the rotary encoder via the deviation.

Abstract: A method for calibrating a rotary encoder for capturing rotational angle position of a machine shaft. The rotary encoder includes an exciter unit which is rotationally fixed to the machine shaft, and a stationary sensor unit which interacts therewith. The method includes rotating the machine shaft to perform a rotational movement at a predefined rotational speed at a first sensor temperature, capturing a first position measured value at a first predefined rotational angle position at the first sensor temperature, heating or cooling the sensor unit to a second sensor temperature, capturing a second position measured value at the first predefined rotational angle position at the second sensor temperature, determining a first deviation between at least the second position measured value and a first desired position measured value, and correcting an output signal from the rotary encoder via the first deviation.

Abstract: A scanning apparatus for detecting a start byte in a high-frequency serial data stream. The scanning apparatus includes a detection unit and a clock signal generator. The detection unit detects the start byte in the high-frequency serial data stream. The detection unit only includes an independent logic detection circuit which only includes temperature-insensitive circuit elements and which excludes addition blocks. The clock signal generator provides the detection unit with a high-frequency clock signal which is synchronized to the high-frequency serial data stream. The high-frequency clock signal is provided with a frequency which is higher than a frequency of the high-frequency serial data stream.

Abstract: A method for calibrating a rotary encoder for measuring a rotary angle position of a machine shaft. The method includes rotating a machine shaft; measuring a start measuring point with a sensor unit; activating a timer module to measure a time value; measuring an intermediate measuring point with the sensor unit; storing the actual rotary angle position of the intermediate measuring point and the time value associated therewith; measuring an end measuring point with the sensor unit; recording a time value incremented by the timer module which reflects a runtime for a rotary motion of the start to the end measuring point; calculating at least one time-dependent reference rotary angle position; calculating a deviation between the actual rotary angle position measured and the at least one time-dependent reference rotary angle position calculated for at least one time value; and correcting an output signal from the rotary encoder via the deviation.