Collision detecting apparatus for vehicle
First Claim
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1. A collision detecting apparatus for a vehicle comprising:
- an acceleration sensor (S) for detecting an acceleration upon collision of said vehicle;
integrating means (I) for cumulatively integrating an output (G) from said acceleration sensor (S) when the output (G) exceeds a specific calculation start level (G0); and
collision detecting means (C) for outputting a collision signal (X) when a cumulative integral value (Σ
G) calculated by said integrating means (I) exceeds a threshold value (α
);
said collision detecting apparatus comprising;
differentiating means (D) for differentiating the output (G) from said acceleration sensor (S); and
correcting means (H) for correcting the threshold value (α
) on the basis of a differential value (dG/dt) calculated by said differentiating means (D), wherein as an absolute value of a differential value (dG/dt) calculated by the differentiating means becomes higher, the threshold value (α
) is corrected for making a detecting sensitivity of the collision detecting means (c) higher.
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Abstract
To provide a collision detecting apparatus for a vehicle, including an integrating apparatus for cumulatively integrating an output from the acceleration sensor when the output exceeds a specific calculation start level, and a collision detecting apparatus for outputting a collision signal when a cumulative integral value calculated by the integrating apparatus exceeds a threshold value. The collision detecting apparatus is intended to accurately perform a collision decision with a high responsiveness irrespective of the severeness of the collision. The collision detecting apparatus includes a differentiating apparatus D for differentiating the output G from the acceleration sensor S, and a correcting apparatus H for correcting the threshold value α on the basis of a differential value (dG/dt) calculated by the differentiating apparatus D.
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Citations
20 Claims
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1. A collision detecting apparatus for a vehicle comprising:
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an acceleration sensor (S) for detecting an acceleration upon collision of said vehicle;
integrating means (I) for cumulatively integrating an output (G) from said acceleration sensor (S) when the output (G) exceeds a specific calculation start level (G0); and
collision detecting means (C) for outputting a collision signal (X) when a cumulative integral value (Σ
G) calculated by said integrating means (I) exceeds a threshold value (α
);
said collision detecting apparatus comprising;
differentiating means (D) for differentiating the output (G) from said acceleration sensor (S); and
correcting means (H) for correcting the threshold value (α
) on the basis of a differential value (dG/dt) calculated by said differentiating means (D),wherein as an absolute value of a differential value (dG/dt) calculated by the differentiating means becomes higher, the threshold value (α
) is corrected for making a detecting sensitivity of the collision detecting means (c) higher.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of detecting a collision of a vehicle comprising the following steps:
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detecting an acceleration upon collision of a vehicle;
cumulatively integrating an output (G) from an acceleration sensor (S) when the output (G) exceeds a specific calculation start level (G0);
outputting a collision signal (X) when a cumulative integral value (Σ
G) calculated by said integrating step exceeds a threshold value (α
);
differentiating the output (G) from said acceleration sensor (S); and
correcting the threshold value (α
) on the basis of a differential value (dG/dt) calculated by said differentiating steps,wherein an output value from the differentiating step stores the threshold value (a) and a correction threshold value (α
′
) set to make a detecting sensitivity of the collision detecting step higher than the usual threshold value (α
).- View Dependent Claims (12, 13, 14, 15, 16, 17, 19, 20)
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18. The method of detecting a collision of a vehicle according to claim wherein in a rigid collision of a vehicle the cumulative integral value Σ
- G exceeds the threshold value α
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dG/dt with a second predetermined timing for providing an optimal control for actuating an air bag.
- G exceeds the threshold value α
Specification
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Current AssigneeHonda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
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Original AssigneeHonda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
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InventorsOta, Atsuo
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Primary Examiner(s)Beaulieu, Yonel
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Assistant Examiner(s)McDieunel, Marc
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Application NumberUS10/244,399Publication NumberTime in Patent Office560 DaysField of Search701/46, 701/45, 701/47, 701/301, 701/300, 340/436, 340/903, 340/669, 180/271, 180/274, 180/232, 180/735, 180/734, 180/268, 180/282, 180/438, 180/272, 180/167, 180/168, 307/10.1, 280/735, 280/734, 280/374, 280/375US Class Current701/46CPC Class CodesB60R 2021/0088 Cycles, e.g. motorcyclesB60R 2021/01322 comprising variable thresho...B60R 21/0132 responsive to vehicle motio...B60R 21/0133 by integrating the amplitud...B62J 27/20 Airbags specially adapted f...
