公开(公告)号：US20230266185A1

公开(公告)日：2023-08-24

申请号：US18041000

申请日：2021-10-25

申请人： Robert Bosch GmbH

发明人： Andreas Breitfeld ,  Christoph Ossmann ,  Frank Schatz ,  Michael Zegowitz ,  Sven Schickle

IPC分类号： G01L3/10 ,  B62J45/411 ,  B62J45/421 ,  B62M6/50

CPC分类号： G01L3/102 ,  B62J45/411 ,  B62J45/421 ,  B62M6/50

摘要： A magnetoelastic torque sensor having an evaluation unit and at least three magnetic field sensors. The evaluation unit acquires at least one measurement signal of a first magnetic field sensor, at least one measurement signal of a second magnetic field sensor and at least one third measurement signal of a third magnetic field sensor of the magnetoelastic torque sensor, and to determine a torque exerted on the shaft using the at least one measurement signal of the first magnetic field sensor, the at least one measurement signal of the second magnetic field sensor, the at least one measurement signal of the fourth magnetic field sensor, and a ratio of a distance between the second magnetic field sensor and the third magnetic field sensor in an axial direction to a distance between the first magnetic field sensor and the second magnetic field sensor in the axial direction.

公开(公告)号：US20230114605A1

公开(公告)日：2023-04-13

申请号：US17913245

申请日：2021-03-10

申请人： Robert Bosch GmbH

发明人： Adrian Kussmann ,  Christoph Ossmann ,  Frank Schatz ,  Michael Zegowitz ,  Sven Schickle

IPC分类号： G01L3/10 ,  B62J45/411

摘要： The invention relates to a system for torque measurement, in particular at a drive of an e-bike, including at least one shaft which is rotatable about an axis, is magnetized in at least one axial partial section, and onto which a torque to be measured can be applied, at least one TMR sensor, which is situated outside the shaft and is designed for at least two-dimensionally, in particular three-dimensionally, measuring a magnetic field and which is arranged in relation to the at least one partial section in such a way that, when the shaft rotates about the axis, the at least one sensor measures a change of the magnetic field due to the magnetostrictive effect in the magnetized partial section when the torque acts on the shaft, and an evaluation unit, which is connected to the at least one TMR sensor and is designed for determining a torque acting on the shaft based on the measured values of the magnetic field.