公开(公告)号：US09103657B2

公开(公告)日：2015-08-11

申请号：US14017453

申请日：2013-09-04

Applicant: NXP B.V.

Inventor： Jacobus Josephus Maria Ruigrok ,  Alexe Levan Nazarian ,  Frederik Willem Maurits Vanhelmont

IPC: G01B7/30 ,  G01R33/02 ,  G01D5/14 ,  G01R33/00 ,  G01R33/09

CPC classification number: G01B7/30 ,  G01D5/145 ,  G01D5/147 ,  G01R33/0011 ,  G01R33/091

Abstract: A magnetic field sensor system for measuring rotational movements of a shaft is disclosed. The sensor system includes a biasing magnet configured for generating a biasing magnetic field and a magnetic wheel having a wheel axis and a circumferential surface which comprises a regular structure of teeth and gaps arranged in an alternating manner. The magnetic wheel is attachable to the shaft and is magnetizable by the biasing magnetic field. A magnetoresistive sensor arrangement comprising four magnetoresistive sensor elements being connected with each other in a Wheatstone bridge, respectively two of the magnetoresistive sensor elements being assigned to one half bridge of the Wheatstone bridge. The four magnetoresistive sensor elements are arranged within an x-y plane.

Abstract translation: 公开了一种用于测量轴的旋转运动的磁场传感器系统。 传感器系统包括被配置为产生偏置磁场的偏置磁体和具有轮轴线和圆周表面的磁轮，该磁轮包括以交替方式布置的齿和间隙的规则结构。 磁轮可连接到轴上，并可通过偏置磁场磁化。 磁阻传感器装置包括四个磁阻传感器元件，彼此在惠斯登电桥中相互连接，分别将两个磁阻传感器元件分配给惠斯通电桥的一个半桥。 四个磁阻传感器元件被布置在x-y平面内。