Occupant weight detecting apparatus
First Claim
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1. An occupant weight detecting apparatus for detecting an occupant weight on a seat comprising:
- a load sensor mounted on the seat to detect a load on the seat and output a load signal;
load calculating means for periodically calculating a detected load value based on the load signal;
determination means for determining if a condition in which the detected load value is less than a first predetermined value continues for a predetermined period;
load average calculating means for calculating an average of a plurality of the detected load values when the determination means determines that the condition in which the detected load value is less than a first predetermined value continues for a predetermined period;
zero point setting means for setting the average of the detected load values to a zero point; and
occupant weight detecting means for detecting the occupant weight based on the detected load value and the zero point when the detected load value exceeds a second predetermined value.
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Abstract
An occupant weight detecting apparatus for detecting an occupant weight on a seat includes a load sensor mounted on the seat to detect a load on the seat and output a load signal. A detected load value is calculated periodically based on the load signal and an average is calculated based on the detected load values calculated during a period in which the detected load value is less than a first predetermined. The average of the detected load values is set to a zero point, and the occupant weight is detected based on the detected load value and the zero point when the detected load value exceeds a second predetermined value.
19 Citations
20 Claims
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1. An occupant weight detecting apparatus for detecting an occupant weight on a seat comprising:
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a load sensor mounted on the seat to detect a load on the seat and output a load signal;
load calculating means for periodically calculating a detected load value based on the load signal;
determination means for determining if a condition in which the detected load value is less than a first predetermined value continues for a predetermined period;
load average calculating means for calculating an average of a plurality of the detected load values when the determination means determines that the condition in which the detected load value is less than a first predetermined value continues for a predetermined period;
zero point setting means for setting the average of the detected load values to a zero point; and
occupant weight detecting means for detecting the occupant weight based on the detected load value and the zero point when the detected load value exceeds a second predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20)
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10. An occupant weight detecting apparatus for detecting an occupant weight on a seat comprising:
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a load sensor mounted on the seat to detect a load on the seat and output a load signal;
load calculating means for periodically calculating a detected load value based on the load signal;
load delaying means for delaying the detected load value so that the delayed load value varies with a time lag following change of the detected load value when the detected load value is less than a first predetermined value;
zero point setting means for setting the delayed load value delayed by the load delaying means to a zero point; and
occupant weight detecting means for detect the occupant weight based on the detected load value and the zero point when the detected load value exceeds a second predetermined value. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An occupant weight detecting apparatus for detecting an occupant weight on a seat comprising:
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a load sensor mounted on the seat to detect a load on the seat and output a load signal;
load calculating means for calculating a detected load value periodically based on the load signal;
load delaying means for delaying the detected load value so that the delayed load value varies with a time lag following change of the detected load value when no occupant is on the seat;
zero point setting means for setting the delayed load value delayed by the load delaying means to a zero point; and
occupant weight detecting means for detect the occupant weight based on the detected load value and the zero point when the occupant is on the seat. - View Dependent Claims (17, 18, 19)
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Specification