发明授权
- 专利标题: Inductive sensing including inductance multiplication with series connected coils
- 专利标题(中): 感应感应包括串联连接线圈的电感倍增
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申请号: US14611947申请日: 2015-02-02
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公开(公告)号: US09157768B2公开(公告)日: 2015-10-13
- 发明人: George Pieter Reitsma , Evgeny Fomin
- 申请人: Texas Instruments Incorporated
- 申请人地址: US TX Dallas
- 专利权人: TEXAS INSTRUMENTS INCORPORATED
- 当前专利权人: TEXAS INSTRUMENTS INCORPORATED
- 当前专利权人地址: US TX Dallas
- 代理商 Andrew Viger; Frank D. Cimino
- 主分类号: H03B7/06
- IPC分类号: H03B7/06 ; G01B7/14 ; G01D5/20
摘要:
Inductive position sensing uses inductance multiplication with series connected sensor coils. In one embodiment, a first sensing domain area is established in a first target plane using first and second sensor coils disposed on a longitudinal axis, on opposite sides of the first target plane and connected in series, so that a series-combined inductance is a multiple of a sum of the respective first and second coil inductances. Target position within the first sensing domain area of the first target plane is detected based on the series-combined inductance of the first and second coils, which changes as the target moves within the first sensing domain area of the first target plane. Further sensitivity can be achieved by additional coils, series connected on the same longitudinal axis, each coil pair defining a sensing area on a respective target plane intermediate the coils.
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