Traffic light backup system using light-emitting diodes

Details Traffic light backup system using light-emitting diodes Traffic light backup system using light-emitting diodes

G - Physics

08

G

G08G 1/095 (2006.01)

Patent

CA 2353833

A traffic light backup system for use with a traffic light is described. The traffic light backup system includes an auxiliary light associated with at least one of the enclosure housing the traffic lights and rechargeable batteries associated with the auxiliary light. A power failure is detected by monitoring the voltage across the bulbs of the traffic lights and also preferably by monitoring the current in the common, neutral lead. When a power failure has been detected, the traffic light backup system engages and the auxiliary light is powered by the rechargeable batteries, preferably in a flashing fashion. In a preferred embodiment, the auxiliary light consists of a plurality of LEDs arranged in an octogonal manner. The LEDs have a high luminosity and lower power consumption, which makes them well suited for use even in broad daylight.

L'invention concerne un système de secours destiné à être utilisé avec un feu de signalisation. Le système comprend un feu auxiliaire, associé à au moins un des boîtiers contenant les feux, et des batteries rechargeables, associées audit feu. Pour détecter une panne de courant, le système contrôle la tension dans les ampoules des feux ainsi que, de préférence, le courant passant dans le fil neutre commun. Quand il détecte une panne, il se met en marche de façon que les batteries rechargeables alimentent le feu auxiliaire, de préférence en mode clignotant. Dans un mode de réalisation préféré, le feu auxiliaire est constitué d'une pluralité de diodes électroluminescentes disposées de manière octogonale. Les diodes ont une luminosité élevée et une faible consommation énergétique, ce qui permet de les utiliser même en plein jour.

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