Leopold Kostal Gmbh & Co. Kg

Sven Kober

Klaus Hirschfeld

Christian Schirp

Oliver Maier

Martin Deitmerg

Stefan Garneyer

Martin Wagner

Meinolf Kathol

Stefan Schroeder

Rainer Buehlmann

Marco Rutkowski

Holger Hasselmann

Werner Thormann

Bernd Vom Hedt

Stefan SCHRÖDER

Rainer BÜHLMANN

A system for detecting the absolute rotational angle of a shaft rotatable more than one revolution includes a drive wheel connected to the shaft to rotate therewith. The drive wheel includes measurement sectors adjacent to one another in a circumferential direction. First and second driven wheels are engaged to the drive wheel. First and second sensors monitor rotational positions of the driven wheels to thereby detect an absolute rotational angle of the shaft. A third sensor monitors a relative angular position of the shaft in relation to a detected one of the measurement sectors to thereby detect the relative angular position of the shaft within one revolution of the shaft. The detected absolute rotational angle of the shaft is refined with the detected relative angular position of the shaft to thereby generate the absolute rotational angle of the shaft with more precision.

Sensor system for detecting absolute rotational angle of a shaft

A switch is formed by a branch including a measurement resistance and a selectable one of switching resistances having different nominal values such that a switch position depends on which switching resistance is selected. The measurement resistance is connected through the selected switching resistance to a supply voltage whereby a voltage drop dependent on the switch position is across the measurement resistance. A controller identifies the switch position by comparison of a measured value (U) of the voltage drop with target voltage drops corresponding to switch positions, calculates a voltage drop (Uges) across the branch based on nominal values of the measurement and selected switching resistances and the supply voltage, forms a difference value (U) between a measured value (U) of the supply voltage and the branch voltage drop (Uges), and qualifies the identified switch position as faulty when the difference value (U) exceeds a difference threshold value (U).

Method for detecting a switching position of a switching device

Growing community of inventors

Bonn, Germany

Sven Kober