发明名称 |
INDUCTIVE PROXIMITY SENSOR WITH ACTIVE CIRCUIT TO CANCEL STRAY FIELDS |
摘要 |
Systems and/or methods are provided for cancelling stray magnetic fields escaping out the back or sides of an inductive proximity sensor. The inductive proximity sensor includes a coil assembly with a sensing coil. The sensing coil detects magnetic flux escaping out the sides and/or back of the sensor. An active circuit couples to the sensing coil. The active circuit generates a canceling current based upon a current and/or electromotive force in the sensing coil due to the flux. The cancelling current drives a driven coil to generate a magnetic field which can reduce total flux through the sensing coil to zero. |
申请公布号 |
US2012081107(A1) |
申请公布日期 |
2012.04.05 |
申请号 |
US20100895099 |
申请日期 |
2010.09.30 |
申请人 |
FITCH JOHN KENNETH;ROCKWELL AUTOMATION TECHNOLOGIES, INC. |
发明人 |
FITCH JOHN KENNETH |
分类号 |
G01B7/14 |
主分类号 |
G01B7/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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