LED railway signal lamp

Abstract

The invention discloses an LED railway signal lamp. A main body circuit of the LED railway signal lamp consists of a main signal lamp circuit and an auxiliary signal lamp circuit, wherein the main signal lamp circuit I comprises a main direct current voltage-stabilizing power supply circuit 4, a main LED fault simulation circuit 5 and a (group of) independent high-power main LED (s) 6; and the auxiliary signal lamp circuit II comprises an auxiliary direct current voltage-stabilizing power supply circuit 7 and a (group of) independent high-power LED (s) 8. When the LED railway signal lamp works, a lightening circuit lightens the main LED (s) 6 and sends out signal indication; when the main LED (s) 6 or the main direct current voltage-stabilizing power supply circuit 4 has faults, a light filament switching circuit lightens the auxiliary LED (s) 8 and sends out signal indication to ensure normal work of the signal lamp; meanwhile, an alarm circuit sends out an alarm signal that a main light filament is broken to prompt that the signal lamp has faults and requires to be maintained. The LED railway signal lamp is also provided with a main LED fault simulation circuit 5 which brings convenience to the inspection, the installation and the debugging of products and the periodical inspection of equipment.

Description

1. Technical field [0001] The invention relates to a railway signal lamp, in particular to a railway signal lamp using LED (light emitting diode) as a light source. 2. Background technology [0002] Railway signal lights are the guarantee for the safe operation of railways. Railway signal lights use incandescent lamps as light source for a long time, the filament of this incandescent lamp is made of main filament and auxiliary filament, and filament conversion circuit, alarm circuit and relevant relay circuit are arranged in its lighting circuit. When working normally, the lighting circuit lights up the main filament to send a signal indication, and when the main filament fails, the filament conversion circuit lights up the auxiliary filament through the relay to send a signal indication, and the alarm circuit sends an alarm for the broken main filament. After a long period of actual operation, the technology of the lighting circuit is relatively mature and reliable. Howev...

AI Technical Summary

Problems solved by technology

[0006] The invention aims at the shortcomings of incandescent railway signal lamps, such as high energy consumption, short service life, frequent replacement of bulbs, and large maintenance workload. Early LED railway signal lamps cannot cooperate with the filament conversion circuit, alarm circuit and related relay circuits in the lighting circuit of the original railway signal lamps. problems, and although there are main and auxiliary light source structures, the criteria for judging the broken wire of the main filament is low, and there are common parts in the DC stabilized power supply circuit. Two (groups) independent high-power LEDs are used to form the main and auxiliary The signal light source is powered by two completely independent main and auxiliary DC regulated power circuits. Once the main LED or the main DC regulated power circuit fails, it will immediately switch to the secondary LED and the secondary DC regulated power circuit to ensure the normal operation of the signal light. Work

Images