Communications: electrical – Land vehicle alarms or indicators – Of collision or contact with external object
Patent
1992-12-10
1996-03-26
Peng, John K.
Communications: electrical
Land vehicle alarms or indicators
Of collision or contact with external object
340435, 340901, 340903, 180271, B60Q 100
Patent
active
055024327
ABSTRACT:
A warning apparatus for warning of possible rear-end collision of a given vehicle having the warning apparatus with another vehicle preceding the given vehicle includes: a computer; a distance sensor for measuring a vehicle-to-vehicle distance to the another preceding vehicle; and a velocity sensor for measuring the velocity of the given vehicle. The computer computes a relative velocity of the given and the another preceding vehicle from a differential of the vehicle-to-vehicle distance and then computes an anticipated rear-end collision time by dividing of the vehicle-to-vehicle distance by the relative velocity of the given vehicle. The computer corrects the anticipated rear-end collision time in response to an acceleration and the relative velocity. The computer produces a warning of signal and an alarm is provided in response to the corrected anticipated rear-end collision time. A method of warning of a possible rear-end collision comprises the step of: detecting a vehicle-to-vehicle distance between a given vehicle and the another vehicle preceding the given vehicle; detecting a velocity of the given vehicle; computing an anticipated rear-end collision time T.sub.a of the given vehicle with the another vehicle, with an equation: ##EQU1## and producing a warning in response to the computed anticipated rear-end collision time T.sub.a.
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Iwasaki Kazuhisa
Kimura Shigeru
Kitamura Hideki
Ohmamyuda Yukio
Senoo Yasushi
Lefkowitz Edward
Peng John K.
Stanley Electric Co. Ltd.
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