发明授权
- 专利标题: Rotational sensor with robust axial alignment tolerance
- 专利标题(中): 旋转传感器具有鲁棒的轴向对准公差
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申请号: US578305申请日: 1995-12-26
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公开(公告)号: US5668471A公开(公告)日: 1997-09-16
- 发明人: Bruno Patrice Bernard Lequesne , Thaddeus Schroeder
- 申请人: Bruno Patrice Bernard Lequesne , Thaddeus Schroeder
- 申请人地址: MI Detroit
- 专利权人: General Motors Corporation
- 当前专利权人: General Motors Corporation
- 当前专利权人地址: MI Detroit
- 主分类号: G01D5/14
- IPC分类号: G01D5/14 ; G01D5/16 ; G01B7/30 ; G01B7/14 ; G01D5/12
摘要:
A rotation sensor for high accuracy angle applications such as internal combustion engine crankshaft position sensing includes a pair of complementary target wheels and a dual-element magnetoresistive sensor. The target wheels are spaced from one another along the rotational axis by a predetermined distance. The individual magnetoresistive elements are similarly spaced one from the other and are influence by the ferrite effects of the target wheels. The spacing of the target wheels and magnetoresistive elements are selected in relation to one another and in relation to the mount of axial play in the crankshaft such that changes in ferrite effects of the target wheels upon the elements due to axial displacements of the crankshaft have minimal effect on the accuracy of the sensing apparatus.