System for capacitive detection of a seat occupancy
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1. A vehicle seat containing a system for capacitive detection of a seat occupancy in a vehicle, comprising:
- a sensing electrode and a shielding electrode arranged in substantially parallel layers in the vehicle seat, and a spacer arranged between said sensing electrode and said shielding electrode to keep said sensing electrode and said shielding electrode at a certain distance from each other, wherein said shielding electrode is configured to cancel at least a portion of an electric field from said sensing electrode, wherein said spacer comprises an inner textile layer, said inner textile layer being a warp-knitted textile fabric, wherein at least one of said electrodes comprises a film-based electrode, and wherein each of said sensing electrode and said shielding electrode are bonded to said inner textile layer in the vehicle seat.
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Abstract
A system for capacitive detection of seat occupancy in a vehicle comprises a sensing electrode and a shielding electrode arranged in substantially parallel layers. A spacer is arranged between the sensing electrode and the shielding electrode to keep the sensing electrode and the shielding electrode at a certain distance from each other. The spacer comprises an inner textile layer and at least one of the electrodes comprises a film-based electrode.
30 Citations
22 Claims
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1. A vehicle seat containing a system for capacitive detection of a seat occupancy in a vehicle, comprising:
a sensing electrode and a shielding electrode arranged in substantially parallel layers in the vehicle seat, and a spacer arranged between said sensing electrode and said shielding electrode to keep said sensing electrode and said shielding electrode at a certain distance from each other, wherein said shielding electrode is configured to cancel at least a portion of an electric field from said sensing electrode, wherein said spacer comprises an inner textile layer, said inner textile layer being a warp-knitted textile fabric, wherein at least one of said electrodes comprises a film-based electrode, and wherein each of said sensing electrode and said shielding electrode are bonded to said inner textile layer in the vehicle seat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A vehicle seat containing a system for capacitive detection of a seat occupancy in a vehicle, comprising:
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a sensing electrode and a shielding electrode arranged in substantially parallel layers in the vehicle seat, wherein said shielding electrode is configured to cancel at least a portion of an electric field from said sensing electrode, and a spacer arranged between said sensing electrode and said shielding electrode to keep said sensing electrode and said shielding electrode at a certain distance from each other, wherein said spacer comprises an inner textile layer, and wherein at least said shielding electrode comprises a film-based electrode, said film-based electrode including a film substrate, a conductive layer applied on said film substrate and a protective layer coating said conductive layer; wherein said inner textile layer comprises a reinforcement pad made of non-tear fabric bonded to said film-based electrode in a region where said system is to be fixed to said vehicle seat.
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16. A vehicle seat containing a system for capacitive detection of a seat occupancy in a vehicle, comprising:
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a sensing electrode and a shielding electrode arranged in substantially parallel layers in the vehicle seat, wherein said shielding electrode is configured to cancel at least a portion of an electric field from said sensing electrode, and a spacer arranged between said sensing electrode and said shielding electrode to keep said sensing electrode and said shielding electrode at a certain distance from each other, said sensing electrode, said spacer and said shielding electrode forming a sandwich arrangement, wherein said spacer comprises an inner textile layer, and wherein at least one of said electrodes comprises a film-based electrode, wherein the system comprises a first outer textile layer and a second outer textile layer, wherein said first and second outer textile layers comprise a first and a second reinforcement pad, respectively, said first and second reinforcement pads being made of non-tear fabric, said first reinforcement pads being bonded to said shielding electrode in a region where said system is to be fixed to a vehicle seat, said second reinforcement pad being bonded to said sensing electrode in said region, and wherein said first and second reinforcement pads join to surround said sandwich arrangement in said region. - View Dependent Claims (17, 18)
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19. A vehicle seat containing a system for capacitive detection of a seat occupancy in a vehicle, comprising:
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a sensing electrode and a shielding electrode arranged in substantially parallel layers in the vehicle seat, wherein said shielding electrode is configured to cancel at least a portion of an electric field from said sensing electrode, and a spacer arranged between said sensing electrode and said shielding electrode to keep said sensing electrode and said shielding electrode at a certain distance from each other, wherein said spacer comprises an inner textile layer, said inner textile layer including a felted material, and wherein at least said shielding electrode comprises a film-based electrode, said film-based electrode including a film substrate, a conductive layer applied on said film substrate and a protective layer coating said conductive layer, said conductive layer being deposited, printed or laminated on said film substrate. - View Dependent Claims (20, 21, 22)
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Specification