Dot matrix infrared cameras use 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, which is also known as the second-generation LED-Array. Compared to first-generation models, the second-generation LED-Array offers advantages such as compact size, efficient heat dissipation, low signal attenuation, and a rated lifespan of 50,000 hours. These cameras are also referred to as high-power array infrared systems. Their main difference from low-power array infrared cameras lies in higher brightness and lower cost. With an independent lens system, the light distribution angle can be adjusted according to user needs, effectively solving issues like the "flashlight effect" of the first generation and the "eccentricity" of the second.
**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 an auto-zoom lens that adjusts the light exposure for the image sensor, improving dynamic performance and protecting the sensor from damage caused by strong light.
2. **Avoid Direct Sunlight**: It’s best 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. If possible, align the camera with the direction of sunlight and avoid shooting towards the sky.
3. **Adjust Gain Settings**: The gain level of the image sensor can be adjusted via the computer’s amplifier. Higher gain improves low-light performance but may increase noise. Users can adjust the gain depending on lighting conditions—higher gain for dim environments and lower gain for better image quality in well-lit areas.
**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 reduces heat output, though long-range performance may not be as effective.
2. **Add Cooling Fans**: Installing cooling fans inside the housing helps dissipate heat, but this requires careful design to ensure both functionality and aesthetics.
3. **Use Constant Current Power Supplies**: Maintaining a steady current helps regulate LED temperature and improve heat management.
4. **Group LEDs**: For example, arranging 24 LEDs into three groups can help spread out the heat more evenly.
5. **Choose Heat-Dissipating Materials**: Using aluminum alloys or other thermally conductive materials for the housing and LED components enhances heat dissipation.
6. **Implement Forced Cooling**: Integrating automatic cooling systems or air conditioning allows the internal temperature to be regulated automatically, providing an effective solution to overheating.
**Difference Between Dot Matrix Infrared Cameras and White Light Cameras**
While dot matrix infrared cameras and white light cameras look similar and both provide low-light imaging at night, they differ in key aspects. The main advantage of white light cameras is their ability to display full-color images at night, making it easier to identify objects. However, dot matrix infrared cameras have significant technical advantages. They offer high brightness, long life (20–30 years), and good heat dissipation due to silicone encapsulation. Additionally, their infrared light is invisible to the human eye, offering excellent concealment for security purposes.
In terms of development, infrared cameras are categorized into first-generation LED models, second-generation array LED models, and third-generation dot matrix models. In some special areas, laser-based infrared or passive thermal imaging is used alongside video surveillance. Currently, active infrared technology is gaining popularity, especially in China, where companies like those in Shenzhen are focusing on dot matrix infrared cameras to meet diverse user needs.
Although dot matrix infrared cameras are technically less advanced than white light cameras in image clarity and color display, they remain highly effective for nighttime surveillance. White light cameras, on the other hand, offer clear, colored images and are often preferred in areas without ambient light. They also provide better cooling solutions, with integrated heat sinks and aluminum plates, resulting in longer lifespans compared to dot matrix infrared cameras.
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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