Vehicle crash data generator
First Claim
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1. A method of obtaining crash data from vehicle crashes comprising the steps of:
- recording first acceleration signals during a crash of a first vehicle;
recording second acceleration signals during a crash of a second vehicle;
generating a first frequency domain signal by filtering and transforming said first acceleration signals, said first frequency domain signal being substantially limited to frequencies below a predetermined cutoff frequency;
generating a second frequency domain signal by filtering and transforming said second acceleration signals, said second frequency domain signal being substantially limited to frequencies above said predetermined cutoff frequency;
adding said first frequency domain signal and said second frequency domain signal to produce a composite signal; and
inverse transforming said composite signal to generate hybrid crash data having characteristics of both of said crashes of said first vehicle and said second vehicle.
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Abstract
Crash data from actual vehicle crashes is manipulated to produce new hybrid crash data which contains different acceleration peaks while retaining the overall characteristics of the original crash data. The new crash data is realistic and can be used to test or verify crash management components such as airbag deployment sensors and to demonstrate the robustness of components to different crashes without the expense of running another crash test.
61 Citations
11 Claims
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1. A method of obtaining crash data from vehicle crashes comprising the steps of:
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recording first acceleration signals during a crash of a first vehicle; recording second acceleration signals during a crash of a second vehicle; generating a first frequency domain signal by filtering and transforming said first acceleration signals, said first frequency domain signal being substantially limited to frequencies below a predetermined cutoff frequency; generating a second frequency domain signal by filtering and transforming said second acceleration signals, said second frequency domain signal being substantially limited to frequencies above said predetermined cutoff frequency; adding said first frequency domain signal and said second frequency domain signal to produce a composite signal; and inverse transforming said composite signal to generate hybrid crash data having characteristics of both of said crashes of said first vehicle and said second vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus for generating crash acceleration data comprising:
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a first crash set-up including a first accelerometer, said first crash set-up recording first acceleration signals from said first accelerometer during a crash of a first vehicle; a second crash set-up including a second accelerometer, said second crash set-up recording second acceleration signals from said second accelerometer during a crash of a second vehicle; a processor generating a first frequency domain signal by filtering and transforming said first acceleration signals wherein said first frequency domain signal is substantially limited to frequencies below a predetermined cutoff frequency, said processor further generating a second frequency domain signal by filtering and transforming said second acceleration signals wherein said second frequency domain signal is substantially limited to frequencies above said predetermined cutoff frequency, said processor adding said first frequency domain signal and said second frequency domain signal to produce a composite signal, said processor inverse transforming said composite signal to generate hybrid crash data having characteristics of both of said crashes of said first vehicle and said second vehicle; and a playback device reproducing said hybrid crash data to simulate a realistic crash of a vehicle. - View Dependent Claims (10, 11)
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Specification