发明名称 |
ARRANGEMENT COMPRISING AN INDUCTIVE PROXIMITY SENSOR, AND METHOD IMPLEMENTING SUCH A SENSOR |
摘要 |
<p>An electronic circuit detecting proximity includes an excitation coil emitting an inductive excitation field toward a target. A first pair of detection coils obtains a first differential inductive signal that is modified by a transition of the target within the inductive field. An out-of phase second pair of detection coils obtains a second differential inductive signal that is modified by a transition of the target within the inductive field. A comparator generates a transition signal when the difference between the first and second differential signals reaches a threshold value. A stationary target, in a ferromagnetic or conductive material, creates an offset to the signals at the outlet of the coil pairs. The offset is decreased during the presence of a movable target within the same type of material or increased during the presence of a movable target within another type of material. A comparator detects the offset level.</p> |
申请公布号 |
EP2513609(B1) |
申请公布日期 |
2014.05.07 |
申请号 |
EP20100795650 |
申请日期 |
2010.12.09 |
申请人 |
POSIC SA |
发明人 |
BERGQVIST, JOHAN;WOULTERS, SIETSE |
分类号 |
G01D5/22 |
主分类号 |
G01D5/22 |
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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