Collision detecting apparatus for vehicle
First Claim
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 stopping the cumulative integration when the output (G) returns to a specific calculation end 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;
vibration waveform detecting means (W) for detecting that an output waveform from said acceleration sensor (S) is a specific periodical vibration waveform;
wherein when said vibration waveform detecting means (W) detects the vibration waveform, said integrating means (I) does not stop the cumulative integration even if the output (G) returns to said specific calculation end level (G0) and continues the cumulative integration for the output (G) that contains not only an output component corresponding to a negative acceleration but also an output component corresponding to a positive acceleration.
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Accused Products
Abstract
To provide a collision detecting apparatus for a vehicle, including an integrating member for cumulatively integrating an output from an acceleration sensor when the output exceeds a specific calculation start level, and a collision detecting member for outputting a collision signal when a cumulative integral value calculated by the integrating member exceeds a threshold value, wherein the collision detecting apparatus is intended to accurately perform a collision decision by preventing the occurrence of an erroneous detection based on a vibration waveform of acceleration of the vehicle as a result of, for example, riding past a stepped portion. The collision detecting apparatus includes a vibration waveform detecting means W for detecting that an output waveform from the acceleration sensor S is a specific periodical vibration waveform. When the vibration waveform detecting member W detects the vibration waveform, the integrating member does not stop the cumulative integration even if the output G returns to a specific calculation end level G0 and continues the cumulative integration for the output G that contains not only an output component corresponding to a negative acceleration but also an output component corresponding to a positive acceleration.
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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 stopping the cumulative integration when the output (G) returns to a specific calculation end 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;
vibration waveform detecting means (W) for detecting that an output waveform from said acceleration sensor (S) is a specific periodical vibration waveform;
wherein when said vibration waveform detecting means (W) detects the vibration waveform, said integrating means (I) does not stop the cumulative integration even if the output (G) returns to said specific calculation end level (G0) and continues the cumulative integration for the output (G) that contains not only an output component corresponding to a negative acceleration but also an output component corresponding to a positive acceleration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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 stopping the cumulative integration when the output (G) returns to a specific calculation end level (G0);
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
);
vibration waveform detecting means (W) for detecting that an output waveform from said acceleration sensor (S) is a specific periodical vibration waveform;
wherein when said vibration waveform detecting means (W) detects the vibration waveform, said integrating means (I) is stopped when the cumulative integration when output (G) returns to said specific calculation end level (G0) and when a cumulative integral value (Σ
G) calculated by said integrating means (I) does not exceed a threshold value (α
) on a negative side.- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification