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Title:
CAPACITIVE SENSING AND HEATING SYSTEM FOR STEERING WHEELS OR SEATS TO SENSE PRESENCE OF HAND OF OCCUPANT ON STEERING WHEEL OR OCCUPANT IN SEAT
Document Type and Number:
WIPO Patent Application WO/2019/147800
Kind Code:
A3
Abstract:
A capacitance measuring system (20) detecting an occupant of a vehicle. A sensor/heater assembly (40,42, 54, 64) is arranged in at least one of a seat (51) or a steering wheel (22) of a vehicle and includes a sensor and a heater arranged adjacent to the sensor. A measurement circuit (24, 58) is configured to output an excitation signal to the measurement circuit and the sensor/heater assembly, measure a resonant frequency of the measurement circuit and the sensor/heater assembly in response to the excitation signal; determine at least one capacitance value based on the resonant frequency; and determine whether a body part is in proximity to the sensor based on the at least one capacitance value.

Inventors:
LAKATOS RÓBERT (HU)
MÁRTON PÉTER (HU)
BARFUSS JACK (CA)
CHEAH DANIEL WEI LI (CA)
GONZALEZ RICARDO EDMUNDO FLORES (US)
MAASS MICHAEL (US)
NORMAND TIM (CA)
FERNANDEZ GERARDO EDEL DE LA GARZA (MX)
Application Number:
US2019/014939
Publication Date:
September 06, 2019
Filing Date:
January 24, 2019
Export Citation:
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Assignee:
GENTHERM INC (US)
International Classes:
B60K35/00; B60K37/06; B60N2/00; B60N2/56; B60R21/015; B62D1/04; B62D1/06; H03K17/955
Foreign References:
DE19724168C11998-08-06
EP2572929A12013-03-27
US20100231239A12010-09-16
US20110190980A12011-08-04
Attorney, Agent or Firm:
WIGGINS, Michael D. (Harness, Dickey & Pierce P.L.C.,P.O. Box 82, Bloomfield Hills Michigan, 48303, US)
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