公开(公告)号：US20200309569A1

公开(公告)日：2020-10-01

申请号：US16760083

申请日：2018-11-09

Applicant: Webasto SE

Inventor： ENRICO EHRICH ,  JANI HOVAN

IPC: G01D5/24 ,  G01P3/483

Abstract: A measuring arrangement and corresponding method for determining the rotational position, speed and/or direction of rotation of a shaft, in particular of an electric motor of an electromotively adjustable device of a vehicle. The measuring arrangement comprises at least first and second electrodes which each form capacitor elements, wherein an electrical voltage can be applied to the electrodes to generate an electric field (EF); a rotatable shaft, in particular a motor shaft, having a measuring section which has an out-of-roundness, wherein the measuring section is arranged relative to the electrodes such that a rotation of the shaft changes the electric field (EF); and an evaluation unit which is conductively connected to an electrode to capacitively capture a change in the electric field (EF), in particular in the form of a change in a voltage applied to an electrode.