With the improvement of lighting product technology, metal halide lamps (white light lamps, halogen lamps for short, also known as tungsten halogen bulbs, halogen quartz bulbs, which are a variant of incandescent lamps) are developed from high-pressure mercury lamps and made from high-purity quartz tubes. The quartz tube is filled with iodide containing mercury, argon, gallium, iron iodide and some rare metal halides. The tungsten electrode is sealed by a molybdenum tape to form a circuit, and the metal lamp cap with a lead is used as the end. The biggest difference between a halogen bulb and an incandescent lamp is that the glass shell of the halogen lamp is filled with some halogen gas (usually iodine or bromine), and its working principle is: when the filament heats up, the tungsten atoms are evaporated back to the glass tube Moving in the direction of the wall, when approaching the wall of the glass tube, the tungsten vapor is cooled to about 800 degrees and combined with halogen atoms to form tungsten halide (tungsten iodide or tungsten bromide). The tungsten halide continues to move to the center of the glass tube, and then returns to the oxidized filament. Because tungsten halide is a very unstable compound, it will decompose into halogen vapor and tungsten when heated, so that tungsten is in the filament again. It is deposited on the upper part to make up for the evaporated part. Through the regeneration cycle process, the service life of the filament is not only greatly extended (almost four times that of an incandescent lamp), but also because the filament can work at a higher temperature, it is more High brightness, higher color temperature and higher luminous efficiency. However, due to the large fluctuations of the railway signal power supply (AC170V-AC250V), it also affects the service life and luminous efficiency of the halogen lamp.
Semiconductor LED light-emitting diode lighting technology is a new type of green lighting industry developed in recent years. In the 1990s, with the invention of the nitride LED, the luminous efficiency of the LED had a qualitative leap. As a light source, the advantages of LED are reflected in three aspects: energy saving, environmental protection and long life. LED does not rely on filament heating to emit light, and its energy conversion efficiency is very high. It only needs 15%-20% of the energy consumption of incandescent lamps, and only about 40%-50% of energy consumption compared with energy-saving fluorescent lamps. In terms of service life, LED adopts solid package, solid structure, and the service life can reach tens of thousands of hours, which is several ten times the service life of fluorescent lamps and nearly a hundred times the service life of incandescent lamps. In addition, the mercury-containing components of the materials used to manufacture fluorescent lamps and incandescent lamps burst during production and use and overflowed with mercury, which caused secondary pollution to the environment.
As we all know, due to the manufacturing process and semiconductor characteristics of semiconductor LED light-emitting diodes, the higher the pn junction temperature, the shorter the service life and the serious degradation of luminous efficiency. On the other hand, the LED signal lamp control circuit is affected by the environment, electromagnetic interference, lightning interference and other factors, causing the LED signal lamp to turn on and off, causing accidents such as railway parking. To this end, we have carried out several tests and modifications, especially in anti-17KV-35KV electromagnetic field interference, anti-lightning interference, use environment, etc., combined with the advantages and disadvantages of the existing low-power LED railway signal lights, developed high-power LED signal lights and halogen lights The lighting two-in-one control unit eliminates the existing filament transformer, which can not only control high-power LED signal lights, but also can be used in the existing halogen signal lamp unit without changing the original signal opening and control mode of the railway department.
LED signal light technology and application,LED Signal Light you can browse related products and initiate consultations on our website.
Semiconductor LED light-emitting diode lighting technology is a new type of green lighting industry developed in recent years. In the 1990s, with the invention of the nitride LED, the luminous efficiency of the LED had a qualitative leap. As a light source, the advantages of LED are reflected in three aspects: energy saving, environmental protection and long life. LED does not rely on filament heating to emit light, and its energy conversion efficiency is very high. It only needs 15%-20% of the energy consumption of incandescent lamps, and only about 40%-50% of energy consumption compared with energy-saving fluorescent lamps. In terms of service life, LED adopts solid package, solid structure, and the service life can reach tens of thousands of hours, which is several ten times the service life of fluorescent lamps and nearly a hundred times the service life of incandescent lamps. In addition, the mercury-containing components of the materials used to manufacture fluorescent lamps and incandescent lamps burst during production and use and overflowed with mercury, which caused secondary pollution to the environment.
As we all know, due to the manufacturing process and semiconductor characteristics of semiconductor LED light-emitting diodes, the higher the pn junction temperature, the shorter the service life and the serious degradation of luminous efficiency. On the other hand, the LED signal lamp control circuit is affected by the environment, electromagnetic interference, lightning interference and other factors, causing the LED signal lamp to turn on and off, causing accidents such as railway parking. To this end, we have carried out several tests and modifications, especially in anti-17KV-35KV electromagnetic field interference, anti-lightning interference, use environment, etc., combined with the advantages and disadvantages of the existing low-power LED railway signal lights, developed high-power LED signal lights and halogen lights The lighting two-in-one control unit eliminates the existing filament transformer, which can not only control high-power LED signal lights, but also can be used in the existing halogen signal lamp unit without changing the original signal opening and control mode of the railway department.
LED signal light technology and application,LED Signal Light you can browse related products and initiate consultations on our website.