Seat load detection method and seat load detection apparatus
AssigneeAisin Seiki Kabushiki Kaisha
InventorsYoshiaki Tomatsu, Noriyuki Nishizawa, Ryohei Fuwa
Life of this patent
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Abstract
A seat load detection method includes a process in which a control unit records a transition of a load detection signal and a transition of a seat load, a process in which the control unit specifies a timing when a load sensor detects a collision of a vehicle based on a transition record of the load detection signal, and a process in which the control unit calculates a correction value of the seat load based on a difference value between a stable seat load provided after the control unit detects the collision of the vehicle and a stable seat load provided before the load sensor detects the collision of the vehicle.
Claims9
A seat load detection method comprising:
- providing a load sensor at a seat of a vehicle outputs a load detection signal relative to a control unit;
- detecting, using the control unit, a seat load acting on the seat based on the load detection signal;
- recording, using the control unit, a transition of the load detection signal and a transition of the seat load;
- detecting, using the load sensor, a collision of the vehicle based on a variance of the load detection signal;
- outputting, using the load sensor, a collision signal relative to the control unit by confirming a detection result that the collision of the vehicle occurs;
- detecting, using the control unit, the collision of the vehicle based on the collision signal;
- specifying, using the control unit, a timing when the load sensor detects the collision of the vehicle based on the transition record of the load detection signal;
- and
- calculating, using the control unit, a correction value of the seat load based on a difference value between a stable seat load provided after the control unit detects the collision of the vehicle and a stable seat load provided before the load sensor detects the collision of the vehicle, a seat load being stable when a variance of the seat load is within a predetermined time is within a predetermined range.
A seat load detection apparatus, comprising:
- a load sensor provided at a seat of a vehicle;
- and
- a control unit detecting a seat load acting on the seat based on a load detection signal outputted by the load sensor,
- wherein the load sensor detects a collision of the vehicle based on a variance of the load detection signal and outputs a collision signal relative to the control unit by confirming a detection result that the collision of the vehicle occurs, and
- wherein the control unit is configured to
- detect the collision of the vehicle based on the collision signal;
- specify a timing when the load sensor detects the collision of the vehicle based on a transition record of the load detection signal by recording the transition of the load detection signal and the transition of the seat load;
- and
- calculate a correction value of the seat load based on a difference value between a stable seat load provided after the control unit detects the collision of the vehicle and a stable seat load provided before the load sensor detects the collision of the vehicle, a seat load being stable when a variance of the seat load is within a predetermined time is within a predetermined range.
Dependencies are inferred from the claim text.