Inductive sensor unit
First Claim
1. An inductive sensor unit (1), for detecting the position of a vehicle seat or for a gate shifting unit of an automatic transmission comprising:
- a plurality of sensor coils (L1, . . . , Li) disposed in planar fashion on a printed circuit board (3), a conductive actuation element (7), adapted to be guided in spaced apart relationship (a), on a path over the sensor coils (L1, . . . , Li), an electrical evaluation circuit (5, 11-17), for detecting changes in inductance of the sensor coils (L1, . . . , Li) in accordance with a path position (x) of the actuation element (7) and for converting the changes into electrical signals corresponding to seat position signals or gear shifting signals, wherein the actuation element (7) is guided, spaced apart (9, 9′
) on both sides, over the sensor coils (L1, . . . , Li), and the electrical evaluation circuit (5, 11-17) detects the inductances of all the sensor coils (L1, . . . , Li) and converts them by means of an algorithm into a current path position (x) of the actuation element (7).
3 Assignments
0 Petitions
Accused Products
Abstract
An inductive sensor unit for detecting the position of a vehicle seat or for a gate-shifting unit of an automatic transmission, is described. The inductive sensor unit has a plurality of sensor coils that are disposed in planar fashion on a printed circuit board. A conductive actuation element which is guided, spaced apart, on a path over the sensor coils, and an electrical evaluation circuit which detects changes in inductance of the sensor coils in accordance with a path position of the actuation element and converts the changes into electrical signals, corresponding to seat position signals or gear shifting signals. The conductive actuation element is guided, spaced apart on both sides, over the sensor coils, and in one aspect of the invention, the electrical evaluation circuit detects the inductances of all the sensor coils (L1, . . . , Li) and converts them by means of an algorithm into a current path position of the actuation element.
56 Citations
20 Claims
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1. An inductive sensor unit (1), for detecting the position of a vehicle seat or for a gate shifting unit of an automatic transmission comprising:
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a plurality of sensor coils (L1, . . . , Li) disposed in planar fashion on a printed circuit board (3), a conductive actuation element (7), adapted to be guided in spaced apart relationship (a), on a path over the sensor coils (L1, . . . , Li), an electrical evaluation circuit (5, 11-17), for detecting changes in inductance of the sensor coils (L1, . . . , Li) in accordance with a path position (x) of the actuation element (7) and for converting the changes into electrical signals corresponding to seat position signals or gear shifting signals, wherein the actuation element (7) is guided, spaced apart (9, 9′
) on both sides, over the sensor coils (L1, . . . , Li), and the electrical evaluation circuit (5, 11-17) detects the inductances of all the sensor coils (L1, . . . , Li) and converts them by means of an algorithm into a current path position (x) of the actuation element (7). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An inductive sensor unit (1), for detecting the position of a vehicle seat or for a gate shifting unit of an automatic transmission comprising:
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a plurality of sensor coils (L1, . . . , Li) disposed in planar fashion on a printed circuit board (3), a conductive actuation element (7), adapted to be guided, in spaced (a) relationship, on a path over the sensor coils (L1, . . . , Li), an electrical evaluation circuit (5, 11-17), which detects for detecting changes in inductance of the sensor coils in accordance with a path position (x) of the actuation element (7) and for converting the changes into electrical signals corresponding to seat position signals or gear shifting signals, and wherein that the conductive actuation element (7) is guided, spaced apart (9, 9′
) on both sides, over the sensor coils (L1, . . . , Li). - View Dependent Claims (14, 15)
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16. An inductive sensor unit (1), for detecting the position of a vehicle seat or for a gate shifting unit of an automatic transmission comprising:
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a plurality of sensor coils (L1, . . . , Li) disposed in planar fashion on a printed circuit board (3), a conductive actuation element (7), adapted to be guided, spaced apart (a), on a path over the sensor coils (L1, . . . , Li), an electrical evaluation circuit (5, 11-17), for detecting changes in inductance of the sensor coils (L1, . . . , Li) in accordance with a path position (x) of the actuation element (7) and converting said changes into electrical signals corresponding to seat position signals or gear shifting signals, the electrical evaluation circuit (5, 11-17) for detecting the inductances of all the sensor coils (L1, . . . , Li) and converting changes into electrical signals further includes an algorithm for determining a current path position (x) of the actuation element (7). - View Dependent Claims (17, 18, 19, 20)
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Specification