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Halogen lamps have high energy consumption and large calorific value. They are infrared lamps used in the traditional market, and their application life is short. Therefore, it is difficult to apply suitable explosion-proof cameras.
There are also two types of multi-chip LEDs, one is containing 4 to 8 chips; the other is an array of light-emitting chips containing 10 to 30 chips. Why do multiple chips? The potential reality is that the interval between IR light irradiation is not enough because the energy is not enough, more chips are gathered together, of course, the energy is large, so the irradiation interval is usually farther. If this can guarantee the acceptance rate of the infrared light, it is right, but under the premise that the receiving rate can not be guaranteed, more infrared light chips will only cause excessive temperature run and affect the life span, and can not really improve the infrared light. Irradiation interval.
In general, multi-chip infrared cameras are still based on ordinary halogen lamps in terms of performance, but multi-chip LEDs have no light-emitting focus due to their inherent structural defects. The light-emitting optical system is unreasonable and the useful light efficiency is also low. For example, an arrayed LED has a current of 1000 mA or more, and its root size is only a penny coin, and heat dissipation becomes a problem. And we all know that the technology, LED is the most afraid of high fever, ah, a high temperature is not bad it is difficult. At the same time, the production requirements of multi-chip LEDs are very strict. Each chip cannot have a slight difference in performance. Otherwise, if one chip is broken, the overall chip LED will be damaged. In general, the application of explosion-proof infrared camera, the life of the existing multi-chip technology LED is far from enough.
Single-chip LED production process is simple, quality is easy to guarantee, low heat, light emitting optical system is reasonable, is to do explosion-proof IR camera infrared light ideal device, in fact, the application life of up to 100,000 hours or more. Therefore, natural technology is biased towards single chips. However, single-chip infrared lamps still have many constraining factors. For example, some LED chips have a very low level, and impurities exceed the standards; some production processes are closed, and there are leakage currents; some super power applications, rated at 20mA, are applied at more than 50mA; Some do not maintain the circuit, or the circuit design is not reasonable, these will lead to a single-chip LED infrared light quickly broken.
To ensure the longevity of infrared lamps, high-grade LED chips must be selected first. High-grade chips have large power, good consistency, high luminous efficiency, and low calorific power. A high-grade LED is 10 times better than ordinary LED's. Of course, the price is higher. Second, the optical system design must be reasonable, the light should be uniform, the utilization rate should be high, and the heat dissipation should be fast. Third, we must strictly control the operating voltage. The LED is very sensitive to voltage, and the LED die will burn off when the voltage is slightly higher, and the amount of light emission will be greatly reduced when the voltage is slightly lower. It is best to match high-quality switching power supply. The AC input voltage can be better regulated from 170V to 270V to adapt to the harsh power supply environment. Fourth, the input power line is preferably made of anti-high/low temperature, ultra-soft anti-torsional. There is a manufacturer of infrared light, the input power cord can be applied at a temperature of minus 60 degrees Celsius, 250 degrees above zero, and minus four or fifty degrees of cable is still soft and silky. This product is only worth trusting.
Therefore, there are also tips on the selection of infrared lamps for explosion-proof cameras. After understanding this knowledge, I believe that in the future selection of explosion-proof cameras, it will help you.
Explosion-proof camera infrared light working principle and service life
At present, explosion-proof cameras can last as long as ten years in service life. Can infrared lamps be used for ten years? Today, we understand the working principle and service life of infrared lamps. Infrared lamps have three important production forms: one, halogen, two, multi-chip LED, three, single-chip LED.