Apparatus and method of warning rear-end collision

Communications: electrical – Land vehicle alarms or indicators – Of collision or contact with external object

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Details

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.

REFERENCES:
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Funkschau, No. 6, 1975, Munchen De pp. 55-57, Bollhagen et al "Ein Infrarot-Auffahrschutzgera/ t fu/ f Kraftfahrzeuge".

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