Occupant classification method based on seated weight measurement
First Claim
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1. A method of classifying an occupant of a motor vehicle seat, comprising the steps of:
- measuring and sampling a seated weight of the occupant to form a primary data set including an average weight, an average standard deviation of said average weight and an average longitudinal center-of-mass of the occupant;
monitoring said average standard deviation of said primary data set to detect an initial period of weight measurement stability;
classifying the occupant as a forward-facing child seat if;
(1) said initial period of weight measurement stability is detected, and (2) the average weight during said initial period does not exceed a child seat threshold, and (3) the average longitudinal center-of-mass during said initial period is rearward of a reference point; and
classifying the occupant as a rearward-facing child seat if;
(1) said initial period of weight measurement stability is detected, and (2) the average weight during said initial period does not exceed a child seat threshold, and (3) the average longitudinal center-of-mass during said initial period is forward of said reference point.
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Abstract
An occupant of a motor vehicle seat is characterized for purposes of air bag suppression based on the seated weight of the occupant, the variation of the seated weight, and the occupant'"'"'s apparent longitudinal center-of-mass. The method distinguishes between an adult and a child seat, distinguishes between forward-facing and rearward-facing child seats, and detects cinching of a child seat.
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Citations
8 Claims
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1. A method of classifying an occupant of a motor vehicle seat, comprising the steps of:
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measuring and sampling a seated weight of the occupant to form a primary data set including an average weight, an average standard deviation of said average weight and an average longitudinal center-of-mass of the occupant; monitoring said average standard deviation of said primary data set to detect an initial period of weight measurement stability; classifying the occupant as a forward-facing child seat if;
(1) said initial period of weight measurement stability is detected, and (2) the average weight during said initial period does not exceed a child seat threshold, and (3) the average longitudinal center-of-mass during said initial period is rearward of a reference point; andclassifying the occupant as a rearward-facing child seat if;
(1) said initial period of weight measurement stability is detected, and (2) the average weight during said initial period does not exceed a child seat threshold, and (3) the average longitudinal center-of-mass during said initial period is forward of said reference point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification