发明授权
- 专利标题: Magnetic field sensor for orientation independent speed and direction measurement
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申请号: US14731967申请日: 2015-06-05
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公开(公告)号: US09605975B2公开(公告)日: 2017-03-28
- 发明人: Andrea Foletto , Andreas P. Friedrich
- 申请人: Allegro Microsystems, LLC
- 申请人地址: US MA Worcester
- 专利权人: ALLEGRO MICORSYSTEMS, LLC
- 当前专利权人: ALLEGRO MICORSYSTEMS, LLC
- 当前专利权人地址: US MA Worcester
- 代理机构: Daly, Crowley, Mofford & Durkee, LLP
- 主分类号: G01D5/14
- IPC分类号: G01D5/14 ; G01D5/16 ; G01R33/07 ; G01R33/09
摘要:
A magnetic field sensor that provides target speed and direction detection that is independent of sensor-to-target orientation includes at least three differential channels, each responsive to a pair of magnetic field sensing elements to generate a respective magnetic field channel signal. A combining element is configured to generate a combined signal based on the first, second, and third magnetic field channel, signals and control circuitry responsive to the combined signal and to at least one of the first, second, and third magnetic field channel signals generates a sensor output signal that indicative of target speed and direction.
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