Surface heating, method for its production, and heatable object, and seat occupancy recognition, seat with it, and seat occupancy recognition method
First Claim
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1. A seat occupancy recognition system comprising:
- a support;
a flexible sensing layer positioned on the support and including a flexible, electrically conductive plastic deformable from a first cross sectional area to a second cross sectional area, where the electrically conductive plastic has a first resistance in the first cross sectional area and a second resistance in the second cross sectional area different from the first resistance;
a plurality of power supply wires each including a contact terminal in electrical connection with the sensing layer; and
a power control unit operably connected to the plurality of power supply wires and including a sensor in electrical connection with the sensing layer, the sensor detecting a change in the resistance of the sensing layer as a result of a weight applied to the sensing layer.
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Abstract
A system for recognizing the occupancy of a seat, containing elements made of electrically conducting synthetic material, especially strips made of electrically conductive polyurethane. A seat equipped with the system. A method for recognizing seat occupancy whereby an alteration in resistance of the electrically conductive material occurring in a change of weight is detected.
22 Citations
34 Claims
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1. A seat occupancy recognition system comprising:
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a support; a flexible sensing layer positioned on the support and including a flexible, electrically conductive plastic deformable from a first cross sectional area to a second cross sectional area, where the electrically conductive plastic has a first resistance in the first cross sectional area and a second resistance in the second cross sectional area different from the first resistance; a plurality of power supply wires each including a contact terminal in electrical connection with the sensing layer; and a power control unit operably connected to the plurality of power supply wires and including a sensor in electrical connection with the sensing layer, the sensor detecting a change in the resistance of the sensing layer as a result of a weight applied to the sensing layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification