INDUCTIVE POSITION SENSOR WITH OFFSET COMPENSATION

An inductive position sensor for determining the position of a moving body along a linear or rotary path (F), including:a moving target (3) adapted to modify an electromagnetic field;a fixed circuit board (5) extending along a limited portion and including a primary coil (7) surrounding two secondar...

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Bibliographische Detailangaben
Hauptverfasser:	FERREIRA DA CUNHA, Jean-Philippe, MÖLLER, Rainer
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	An inductive position sensor for determining the position of a moving body along a linear or rotary path (F), including:a moving target (3) adapted to modify an electromagnetic field;a fixed circuit board (5) extending along a limited portion and including a primary coil (7) surrounding two secondary coils (8, 9) having substantially identical lengths (L) and having shapes of sine and cosine functions;a current generator (11) to create an inductive coupling modulated by the position of the target;a detector (13) of the linear or angular position of the target;and a system for balancing the coupling between the primary coil (7) and the secondary coils (8, 9) to compensate for the measurement offset induced by the proximity between the secondary coils (8, 9) and the end segments (7b) of the primary coil (7).