A system including an assembly arranged in at least one of a seat and a steering wheel of a vehicle and a measurement circuit. The assembly includes a sensor and a heater arranged adjacent to the sensor. The measurement circuit is configured to output an excitation signal to the measurement circuit and the assembly and measure a resonant frequency of the measurement circuit and the assembly in response to the excitation signal. The measurement circuit is configured to determine a capacitance value based on the resonant frequency and determine whether a body part is in proximity to the sensor based on the capacitance value.
CAPACITIVE SENSING AND HEATING SYSTEM FOR STEERING WHEELS OR SEATS TO SENSE PRESENCE OF HAND OF OCCUPANT ON STEERING WHEEL OR OCCUPANT IN SEAT
2021-05-06
Patent
Elektronische Ressource
Englisch
IPC: | G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B62D MOTOR VEHICLES , Motorfahrzeuge / G01V Geophysik , GEOPHYSICS / H03K PULSE TECHNIQUE , Impulstechnik |
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