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, CHEAH, Daniel Wei Li, MÁRTON, Péter, MAASS, Michael, FERNANDEZ, Gerardo Edel de la Garza, BARFUSS, Jack, LAKATOS, Róbert, GONZALEZ, Ricardo Edmundo Flores
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES AUXILIARY DRIVES FOR VEHICLES BASIC ELECTRONIC CIRCUITRY ELECTRICITY INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MOTOR VEHICLES PERFORMING OPERATIONS PULSE TECHNIQUE SEATS SPECIALLY ADAPTED FOR VEHICLES TRAILERS TRANSPORTING VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDEDFOR VEHICLES IN GENERAL VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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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. La présente invention concerne un système de mesure de capacité destiné à détecter un occupant d'un véhicule. Un ensemble capteur/dispositif de chauffage est disposé dans un siège et/ou un volant d'un véhicule et comprend un capteur et un dispositif de chauffage placé à côté du capteur. Un circuit de mesure est conçu pour délivrer un signal d'excitation au circuit de mesure et à l'ensemble capteur/dispositif de chauffage, mesurer une fréquence de résonance du circuit de mesure et de l'ensemble capteur/dispositif de chauffage en réponse au signal d'excitation; déterminer au moins une valeur de capacité sur la base de la fréquence de résonance; et déterminer si une partie du corps est à proximité du capteur sur la base de ladite valeur de capacité.