Inductive sensor unit

Details Inductive sensor unit Inductive sensor unit

2007-01-09

2007-01-09

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207150

Reexamination Certificate

active

11239643

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 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.

REFERENCES:
patent: 5055814 (1991-10-01), Morimura et al.
patent: 6819120 (2004-11-01), Tam
patent: 2005/0258687 (2005-11-01), Zapf et al.

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