Occupant protection device
First Claim
1. An occupant protection device, comprising:
- an input signal acquisition unit for acquiring acceleration signals or angular velocity signals from sensors installed in a vehicle;
a digital signal processing unit for generating an output signal in a time series of the acceleration signals or angular velocity signals composed of consecutive first, second and third intervals including a plurality of points by changing a multiplication factor of the second interval in comparison with the first and third intervals with respect to a vibration component and a collision component and by attenuating the vibration component by controlling a delay time for the collision component; and
a status determination unit for determining a collision or rollover of the vehicle based on the output signal.
1 Assignment
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Accused Products
Abstract
The occupant protection device (air bag ECU 1) of the invention is composed of an input signal acquisition unit 11 for acquiring acceleration signals or angular velocity signals from sensors installed in a vehicle, a digital signal processing unit 12 for generating an output signal in a time series of the acceleration signals or angular velocity signals composed of consecutive first, second and third intervals by changing a multiplication factor of the second interval in comparison with the first and third intervals, a status determination unit 13 for determining a collision or rollover of the vehicle based on the output signal, and an air bag actuation circuit 14 for igniting a squib 32.
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Citations
20 Claims
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1. An occupant protection device, comprising:
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an input signal acquisition unit for acquiring acceleration signals or angular velocity signals from sensors installed in a vehicle; a digital signal processing unit for generating an output signal in a time series of the acceleration signals or angular velocity signals composed of consecutive first, second and third intervals including a plurality of points by changing a multiplication factor of the second interval in comparison with the first and third intervals with respect to a vibration component and a collision component and by attenuating the vibration component by controlling a delay time for the collision component; and a status determination unit for determining a collision or rollover of the vehicle based on the output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An occupant protection device, comprising:
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an input signal acquisition unit for acquiring acceleration signals or angular velocity signals from sensors installed in a vehicle; a digital signal processing unit for generating an output signal in a time series of the acceleration signals or angular velocity signals composed of consecutive first, second and third intervals including a plurality of points by changing a multiplication factor of the second interval in comparison with the first and third intervals; and a status determination unit for determining a collision or rollover of the vehicle based on the output signal, wherein the digital signal processing unit carries out averaging processing on a plurality of intervals of the acceleration signals or angular velocity signals, combines the results of the interval averaging processing, and generates an output signal by changing the multiplication factor of the second interval in comparison with the first and third intervals, and wherein the digital signal processing unit generates an output signal by adding an output in which a comparatively short-interval average is delayed by a prescribed amount of time, and an output of a long-interval average relative to the comparatively short-interval average, wherein the status determination unit determines a collision or rollover of the vehicle in the case the digital signal processing unit integrates an output signal generated by subtracting an output in which a short-interval average is delayed by a prescribed amount of time from an output of a long-interval average, and an output signal obtained by the integration is equal to or greater than a prescribed value.
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14. An occupant protection device, comprising:
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an input signal acquisition unit for acquiring acceleration signals or angular velocity signals from sensors installed in a vehicle; a digital signal processing unit for generating an output signal in a time series of the acceleration signals or angular velocity signals composed of consecutive first, second and third intervals including a plurality of points by changing a multiplication factor of the second interval in comparison with the first and third intervals; and a status determination unit for determining a collision or rollover of the vehicle based on the output signal, wherein the status determination unit determines a collision or rollover of the vehicle in a case the digital signal processing unit integrates an output signal generated by subtracting an output in which a short-interval average is delayed by a prescribed amount of time from an output of a long-interval average, and an output signal obtained by the integration is equal to or greater than a prescribed value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification