Method and system for detecting occupant seat weight sensor measurement error
First Claim
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1. A vehicle system having a vehicle occupant seat, said vehicle system comprising:
- a first weight sensor coupled to said seat and operable to generate a first weight signal;
a second weight sensor coupled to said seat and operable to generate a second weight signal; and
an electronic control unit (ECU) coupled to said first weight sensor and said second weight sensor;
wherein said ECU is operable to execute an occupant classification algorithm for generating an occupant classification signal as a function of said first weight signal and said second weight signal, and said ECU includes variant signal metrics for generating an error signal as a function of comparing said first weight signal to said second weight signal, with said vehicle system further comprising a restraints control module that is coupled to said ECU and operable to activate vehicle safety systems as a function of at least one of said occupant classification signal and said error signal, and wherein said restraints control module is operable to disregard said occupant classification signal when said error signal indicates that said seat is constrained, wherein said ECU is operable to compare said first weight signal to said second weight signal by comparing expected gradients of said first weight signal and second weight signal to a minimum expected gradient of a functional sensor.
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Abstract
A vehicle system includes a vehicle occupant seat including at least two weight sensors coupled to the seat for generating weight signals. The system further includes an electronic control unit (ECU) including an occupant classification algorithm for generating an occupant classification signal as a function of the weight signals. The electronic control unit further includes variant signal metrics for generating an error signal as a function of comparing the weight signals.
18 Citations
1 Claim
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1. A vehicle system having a vehicle occupant seat, said vehicle system comprising:
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a first weight sensor coupled to said seat and operable to generate a first weight signal; a second weight sensor coupled to said seat and operable to generate a second weight signal; and an electronic control unit (ECU) coupled to said first weight sensor and said second weight sensor; wherein said ECU is operable to execute an occupant classification algorithm for generating an occupant classification signal as a function of said first weight signal and said second weight signal, and said ECU includes variant signal metrics for generating an error signal as a function of comparing said first weight signal to said second weight signal, with said vehicle system further comprising a restraints control module that is coupled to said ECU and operable to activate vehicle safety systems as a function of at least one of said occupant classification signal and said error signal, and wherein said restraints control module is operable to disregard said occupant classification signal when said error signal indicates that said seat is constrained, wherein said ECU is operable to compare said first weight signal to said second weight signal by comparing expected gradients of said first weight signal and second weight signal to a minimum expected gradient of a functional sensor.
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Specification
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Current AssigneeFord Global Technologies, LLC (Ford Motor Company)
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Original AssigneeFord Global Technologies, LLC (Ford Motor Company)
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InventorsBujak, Chris, Philip, Abraham, Griffin, Christopher
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Primary Examiner(s)Mawari, Redhwan K
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Assistant Examiner(s)King, Rodney P
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Application NumberUS10/993,493Publication NumberTime in Patent Office4,016 DaysField of Search180271-273, 280/801.1, 280/801.2, 280802-808, 701 29- 36, 701 45- 47, 177/25.12, 177/26, 177 45- 48, 177/144, 177/200, 340/667US Class Current1/1CPC Class CodesB60N 2/002 Seats provided with an occu...B60N 2205/00 General mechanical or struc...B60R 2225/00 Means indicating the functi...
