发明授权
- 专利标题: Steering column differential angle position sensor
- 专利标题(中): 转向柱差角位置传感器
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申请号: US09663473申请日: 2000-09-15
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公开(公告)号: US06443020B1公开(公告)日: 2002-09-03
- 发明人: Yingjie Lin , Warren Baxter Nicholson , Steven Douglas Thomson
- 申请人: Yingjie Lin , Warren Baxter Nicholson , Steven Douglas Thomson
- 主分类号: G01L302
- IPC分类号: G01L302
摘要:
A steering column differential angle position sensor includes an upper target wheel and a lower target wheel. Each target wheel forms a plurality of similarly shaped slots that are equally spaced radially around the target wheels. Two receiver coils and a excitation coil are coaxially aligned with the target wheels. A hollow housing surrounds the target wheels and the coils. The excitation coil generates an alternating current magnetic field around itself, and this alternating current magnetic field generates eddy current in the target wheels. The receiver coils receive an alternating current signal that is a combination of the alternating current magnetic field generated by the excitation coil and the eddy current. The receiver coils sense changes in the alternating current signal due to differential slot alignment of the target wheels, and hence, the torque on a steering column that is mechanically coupled to the sensor.
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