Passenger seat having occupant detector for automotive vehicle

Details Passenger seat having occupant detector for automotive vehicle Passenger seat having occupant detector for automotive vehicle

2011-04-19

2011-04-19

Paschall, Mark H (Department: 3742)

Electric heating

Heating devices

Combined with diverse-type art device

C219S202000, C219S541000

Reexamination Certificate

active

07928341

ABSTRACT:
An electrode unit for detecting whether a seat is occupied or not (occupancy conditions) is embedded in a seat of an automotive vehicle together with an electrically powered seat heater. Both of the electrode unit and the seat heater are flat, and the electrode unit is laminated on the heat heater. The electrode unit is composed of an upper electrode, a lower electrode and an insulating film disposed between both electrodes. The occupancy conditions are detected based on changes in a capacitance between the upper electrode and a member grounded to a vehicle body. To reduce a capacitance between the upper electrode and seat heater and to thereby improve sensitivity of the detection of the occupancy conditions, an alternating voltage that alternates in accordance with an alternating voltage supplied to the upper electrode is supplied to the lower electrode.

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