Dot matrix infrared cameras utilize dot matrix infrared light sources. The third-generation infrared light-emitting components used in these lamps are based on the second-generation LED-Array technology, also known as array-based infrared LEDs. Compared to the first generation, the second-generation LED-Arrays offer advantages such as compact size, efficient heat dissipation, low signal degradation, and a rated lifespan of up to 50,000 hours. These cameras are sometimes referred to as high-power array infrared systems. Their main difference from low-power array infrared systems is higher brightness and lower cost. With an independent lens system, the light distribution angle can be adjusted according to specific needs, effectively solving issues like the "flashlight effect" of the first generation and the "eccentricity" problem of the second generation.
**How to Install a Dot Matrix Infrared Camera**
1. **Outdoor Installation**: When installing a dot matrix infrared camera outdoors, it's essential to use an outdoor housing. Outdoor cameras typically feature auto-zoom lenses that help adjust the light exposure for the image sensor, enhancing dynamic range and protecting the sensor from damage caused by intense light.
2. **Avoid Direct Sunlight**: Try to avoid pointing the camera directly at the sun, as this can cause overexposure and potentially damage the color filters on the image sensor, leading to image streaks. Ideally, position the camera so that it faces the same direction as the sun’s rays, and avoid shooting towards the sky if possible.
3. **Adjust Gain Settings**: The gain level of the image sensor can be adjusted via the computer. Higher gain improves performance in low-light conditions but may introduce more noise. Users can choose higher gain when lighting is poor and lower gain for better image quality when light levels are sufficient.
**Six Ways to Solve Heat Dissipation Issues in Dot Matrix Infrared Cameras**
1. **Reduce Current**: Using low-power infrared lamps instead of high-power ones helps reduce heat, though long-range performance may be compromised.
2. **Add a Cooling Fan**: Installing a fan can improve cooling, but it requires careful design to ensure reliability and aesthetics.
3. **Use Constant Current Power Supply**: Maintaining a steady current helps regulate LED temperature and improve heat management.
4. **Group LED Arrangement**: For example, 24 infrared LEDs can be divided into three groups to reduce overall heat output.
5. **Choose Heat-Dissipating Materials**: Using aluminum alloys or other conductive materials for both the LED lamps and housing enhances thermal performance.
6. **Implement Forced Cooling**: Automatic cooling systems with air conditioning can regulate internal temperatures, providing a reliable solution to overheating.
**Difference Between Dot Matrix Infrared Cameras and White Light Cameras**
While white light cameras and infrared cameras appear similar in appearance and function, both provide low-light imaging capabilities at night. However, their differences lie in image quality and technical advantages. As a core component of the security industry, video surveillance has seen continuous innovation, particularly in night vision technology.
The dot matrix infrared camera offers strong brightness, with multiple LED lights and a 3W infrared lamp output. It features a long lifespan, silicone encapsulation, good heat dissipation, and low signal attenuation, with a life expectancy of 20–30 years. Its high-efficiency power supply and array-based LED technology make it highly effective in collecting evening light, offering excellent night vision performance. Additionally, its emitted infrared light is invisible to the human eye, providing good concealment and making it ideal for deterring intruders.
In contrast, white light cameras produce color images at night, offering clearer visuals and easier identification of subjects. They are often used in areas without ambient light, such as underground parking lots or rural regions, where they can save costs by eliminating the need for streetlights. Their cooling systems are also more efficient, with integrated tin lamps and aluminum plates for better heat dissipation, resulting in longer lifespans compared to dot matrix infrared cameras.
Currently, infrared cameras are categorized into first-generation LED, second-generation array LED, and third-generation dot matrix models. In special applications, laser or passive thermal imager systems are also used. In China, active infrared technology is gaining traction, with companies in Shenzhen focusing on developing dot matrix infrared cameras to meet diverse user needs.
Low Porosity Refractory Brick
Low porosity clay bricks are made of low aluminum mullite as the main raw material, formed by high pressure molding and high temperature sintering. The main mineral composition is mullite phase, the product has excellent high temperature physical properties and chemical erosion resistance.
Low porosity clay brick stability is good, the degree of erosion does not occur sudden change, than ordinary clay brick life increased by 2 to 3 times. Thermal conductivity, specific heat and solubility, respectively, than ordinary clay bricks 2 times higher than 10% and 40%, heat storage capacity than ordinary clay bricks 50% to 60% higher than the thermal efficiency of the kiln can be improved.
Low porosity clay bricks are characterized by:
1. Low porosity, 13 to 15%;
2. Load softening temperature is high for about 1472 ℃;
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5. good resistance to infiltration and erosion.
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