Excess speed calculator and signaler

Details Excess speed calculator and signaler Excess speed calculator and signaler

G - Physics

01

P

G01P 3/42 (2006.01) G01P 3/50 (2006.01)

Patent

CA 2186790

In a device for calculating and signaling excess vehicular speed to the vehicle occupants, it is known to have a component which transmits a digital signal of the lawful maximum roadway speed limit posted from a fixed point transmitter to an in-vehicle signal receiving component which in turn sends the posted maximum speed digital value to the Excess Speed Calculator and Signaler. An additional component is a digital speedometer which sends the actual vehicle speed digital value to the Excess Speed Calculator and Signaler. The Excess Speed Calculator and Signaler device, upon receiving these two digital values, makes a comparison of the maximum posted speed limit value to the actual vehicle speed value and subsequently sends a signal to an audible alarm and visual display inside the vehicle when the posted digital roadway speed limit is exceeded by the actual digital speed of the vehicle. The visual display and audible alarm will continue until: the driver reduces the vehicle speed to the lawful maximum posted roadway speed limit, or the driver turns off the Excess Speed Calculator and Signaler device, or the vehicle proceeds along the roadway until the Excess Speed Calculator and Signaler device receives another digital signal from the next fixed point posted roadway maximum speed transmitter, recalculates for excess vehicular speed and stops sending the visual and audible signals when vehicular speed is within the lawful posted roadway speed limit or alternatively, signals the newly calculated excess speed condition. There is no previous application known which calculates a comparison of the lawful maximum roadway speed limit posted to the actual vehicle speed for the purpose of issuing an alarm to the occupants inside the said vehicle when the speed of travel is in excess of the lawful maximum roadway speed limit posted.

Cette invention concerne un dispositif de calcul et d'alerte de dépassement de la vitesse limite autorisée qui fait appel à un récepteur embarqué qui reçoit d'un transmetteur numérique en bordure de la route un signal de vitesse maximum autorisée et qui relaie cette information au calculateur de dépassement de la limite autorisée. Le dispositif fait également appel à compteur de vitesse numérique qui transmet la vitesse réelle mesurée du véhicule au calculateur de dépassement. Celui-ci compare les deux informations et, s'il y a dépassement, envoie un signal à un dispositif embarqué d'alerte sonore et visuelle. Ce dispositif d'alerte se fera entendre et continuera d'afficher l'avis de dépassement jusqu'à ce que le conducteur ait réduit sa vitesse à la limite autorisée, jusqu'à ce que le conducteur décide de fermer le dispositif de calcul et d'alerte de dépassement ou jusqu'à ce que le véhicule reçoive un nouveau signal de vitesse maximum autorisée que le dispositif détermine être est inférieure ou égale à la vitesse réelle du véhicule. Il n'existe aucune application antérieure connue qui calcule l'écart entre la vitesse maximum autorisée et la vitesse réelle du véhicule dans le but d'alerter les occupants du véhicule du dépassement de la vitesse maximum autorisée.

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