Each of detection units detects electrostatic capacitance values Cc, Cr, Cl produced between sensors and a passenger H, based on electrical signals Sc, Sr, Sl outputted from the sensors, respectively. A total value calculation unit sums electrostatic capacitance values Cc, Cr, Cl to calculate a total value Ct of the electrostatic capacitance values Cc, Cr, Cl. A comparison determination unit compares the total value Ct with a first threshold value Cth1 to make a contact determination of whether the passenger H is in contact with a steering wheel.
Steering wheel unit
2020-06-09
Patent
Elektronische Ressource
Englisch
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |