CAPACITIVE SENSING AND HEATING SYSTEM FOR STEERING WHEELS OR SEATS TO SENSE PRESENCE OF HAND OF OCCUPANT ON STEERING WHEEL OR OCCUPANT IN SEAT

A capacitance measuring system detecting an occupant of a vehicle. A sensor/heater assembly is arranged in at least one of a seat or a steering wheel of a vehicle and includes a sensor and a heater arranged adjacent to the sensor. A measurement circuit is configured to output an excitation signal to...

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Bibliographische Detailangaben
Hauptverfasser:	NORMAND, Tim, MARTON, Peter, CHEAH, Daniel Wei Li, LAKATOS, Robert, MAASS, Michael, FERNANDEZ, Gerardo Edel de la Garza, BARFUSS, Jack, GONZALEZ, Ricardo Edmundo Flores
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES DETECTING MASSES OR OBJECTS GEOPHYSICS GRAVITATIONAL MEASUREMENTS INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MOTOR VEHICLES PERFORMING OPERATIONS PHYSICS SEATS SPECIALLY ADAPTED FOR VEHICLES TARIFF METERING APPARATUS TESTING TRAILERS TRANSPORTING VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDEDFOR VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A capacitance measuring system detecting an occupant of a vehicle. A sensor/heater assembly is arranged in at least one of a seat or a steering wheel of a vehicle and includes a sensor and a heater arranged adjacent to the sensor. A measurement circuit 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.