公开(公告)号：US20190248413A1

公开(公告)日：2019-08-15

申请号：US16105011

申请日：2018-08-20

申请人： TRW Automotive U.S. LLC

发明人： Richard A. Neuhaus ,  Vidya Sagar R. Mote

IPC分类号： B62D15/02 ,  G01D5/04 ,  G01B7/30

CPC分类号： B62D15/0215 ,  B62D15/0245 ,  G01B7/30 ,  G01D5/04

摘要： An absolute steering angle sensor includes a single main gear having first gear teeth with a first pitch, second gear teeth with a second pitch, wherein the first and second gear pitches are different. A first magnet gear is driven by the first gear teeth, wherein the first magnet gear has a first gear profile and a first diameter. A second magnet gear is driven by the second gear teeth, wherein the second magnet gear has a second gear profile and a second diameter. The first and second gear profiles are different, and the first and second diameters are different. A first magnet rotates with the first magnet gear and emits a first magnetic field, and a second magnet rotates with the second magnet gear and emits a second magnetic field. A sensor assembly measures strengths of the first and second magnetic fields and calculates an absolute steering angle.