De-icing system for traffic signals

Details De-icing system for traffic signals De-icing system for traffic signals

H - Electricity

05

B

H05B 33/02 (2006.01) E01H 5/10 (2006.01) F21V 29/00 (2006.01) F25C 5/08 (2006.01) G01N 21/55 (2006.01) H05B 1/02 (2006.01) G08G 1/095 (2006.01)

Patent

CA 2548886

A circuit is disclosed for detecting and eliminating the buildup of snow and/or ice on the viewable face of an LED traffic signal lens. The circuit measures the ambient temperature within the LED signal, and when the temperature falls to a level where snow and/or ice accumulation can occur, the circuit begins looking for snow and/or ice buildup on the lens of the LED signal. An infrared LED transmits a signal which is reflected when snow or ice is present on the lens of the traffic signal. When the reflected signal is received by an infrared receiver, it sends a signal to a microcontroller, which analyzes the signal to determine if it is a valid signal. If it is, a heater is turned on until the ice and snow are removed.

L'invention porte sur un circuit servant à détecter et à éliminer la neige ou la glace accumulée sur la surface visible de la lentille d'un feu de signalisation à diode électroluminescente (DEL). Le circuit mesure la température ambiante dans le feu de signalisation à DEL, et quand la température chute et atteint un point où de la neige ou de la glace pourrait s'accumuler, le circuit commence à vérifier si de la neige ou de la glace s'est accumulée sur la lentille du feu de signalisation à DEL. Une DEL à infrarouge transmet un signal qui est réfléchi quand de la neige ou de la glace recouvre la lentille du feu de signalisation. Lorsque le récepteur infrarouge reçoit le signal réfléchi, il envoie un signal à un contrôleur de périphériques microprogrammé qui analyse le signal pour déterminer s'il est valide. Si c'est le cas, un réchauffeur s'allume jusqu'à ce que la glace et la neige soient éliminées.

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