Passenger detecting apparatus for vehicle
First Claim
1. A vehicle passenger detecting apparatus in which a load sensor is provided to detect a load acting on a vehicle seat on the basis of a distortion of a seat adjuster portion in a vehicle so that a load detection value taken when said vehicle seat is in an unoccupied state is stored as an unoccupied-seat reference value in advance and a state of a seated passenger on said vehicle seat is detected on the basis of a relative value between a load detection value from said load sensor and said unoccupied-seat reference value, said apparatus comprising reference correcting means for, in a case in which an ignition key switch and a buckle switch are in off conditions and a load detection value from said load sensor in said off conditions falls below an unoccupied-seat load value set in advance, correcting said unoccupied-seat reference value through the use of said load detection value from said load sensor.
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Accused Products
Abstract
The present invention relates to a vehicle passenger detecting apparatus capable of detecting an unoccupied-seat state through the use of existing signals in a vehicle and correcting an unoccupied-seat reference value with a simple configuration. In a case in which an ignition key switch and a buckle switch are in off conditions and a load detecting value, which is the sum of measurement data from load sensors in these conditions, falls below a predetermined unoccupied-seat load value, an occupied-seat reference value serving as a load measurement standard for detection of a state of a vehicle passenger is corrected using the load detection value. This eliminates the influence of vibrations stemming from engine revolutions and electrical noises and enables the reference value to be corrected using a stabler load detection value.
13 Citations
16 Claims
- 1. A vehicle passenger detecting apparatus in which a load sensor is provided to detect a load acting on a vehicle seat on the basis of a distortion of a seat adjuster portion in a vehicle so that a load detection value taken when said vehicle seat is in an unoccupied state is stored as an unoccupied-seat reference value in advance and a state of a seated passenger on said vehicle seat is detected on the basis of a relative value between a load detection value from said load sensor and said unoccupied-seat reference value, said apparatus comprising reference correcting means for, in a case in which an ignition key switch and a buckle switch are in off conditions and a load detection value from said load sensor in said off conditions falls below an unoccupied-seat load value set in advance, correcting said unoccupied-seat reference value through the use of said load detection value from said load sensor.
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9. A vehicle passenger detecting apparatus comprising:
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a seat track interposed between a floor of a vehicle and a seat cushion frame of said vehicle to make said seat cushion frame movable in longitudinal directions of said vehicle with respect to said floor; and
a load sensor for detecting a load acting on said seat cushion frame on the basis of a displacement of said seat cushion frame with respect to an upper rail of said seat track, with a load detection value taken when a vehicle seat is in an unoccupied state being stored as an unoccupied-seat reference value in advance and a state of a seated passenger on said vehicle seat being detected on the basis of a relative value between a load detection value from said load sensor and said unoccupied-seat reference value,said apparatus including reference correcting means for, in a case in which an ignition key switch and a buckle switch are in off conditions and a load detection value from said load sensor in said off conditions falls below an unoccupied-seat load value set in advance, correcting said unoccupied-seat reference value through the use of said load detection value from said load sensor. - View Dependent Claims (10, 11, 12, 16)
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Specification