METHOD AND DEVICE FOR CONTACTLESS SENSING ROTATION AND ANGULAR POSITION USING ORIENTATION TRACKING

摘要

Method and device for contactless sensing rotation and angular position using orientation tracking. 2.1 To improve the accuracy and possible resolution of a magnetic positioning system, a method and a device using a special tracking technique is proposed. 2.2 The method and the device are using multiple magnetic field sensing elements at different positions below a magnetic target. The sensed signals are used to select or combine the sensing elements for a best approach to the actual orientation of the magnet. This allows putting out the related orientation of the approach as a coarse value and the remaining displacement as a fine value. 2.3 A device using this method allows highly accurate measurement of angular positions controlling or tolerating the placement of a magnet as the input source.