Five common problems and solutions for infrared cameras

One of the five common problems and solutions of infrared cameras: waterproof effect is not ideal, fogging

General infrared cameras are sealed and have an IP66 rating. However, when the infrared lamp starts to work, it will generate a lot of heat. At the same time, due to the insufficient heat dissipation effect of the outer casing and the poor sealing of the machine itself, the machine will have more or less soda inside after using the machine for a period of time (this phenomenon is mainly concentrated). In the northern region), affecting the monitoring effect. Some of these manufacturers use a venting design, which increases the venting valve to facilitate exchange with external temperature, and some use nitrogen to ensure that the inside of the machine is inert gas to ensure no moisture.

The five major problems and solutions of infrared cameras are common: the night vision effect is not ideal.

This phenomenon is mainly caused by the effect of the flashlight or the distance is not enough. In fact, this problem is mainly caused by the angle and function of the infrared light. The infrared light used by the infrared camera has a peak wavelength of 850, and the angle can be selected from 5 to 60 degrees. When the infrared emitting tube angle is smaller, the farther the illumination distance is, the flashlight is The effect is more obvious. On the contrary, the larger the angle, the less the effect of the flashlight, but the distance is greatly reduced. To solve this problem, it is mainly to see what kind of effect the manufacturer wants and what kind of cost, of course, the power and price of the infrared transmitting lamp. It is directly proportional to the distance. Farsighted Universal's infrared camera products use the industry's first-class infrared lamps and lenses to ensure night vision effects and completely eliminate the flashlight effect.

The five major problems and solutions of infrared cameras: daytime color cast

The color of the inferior manufacturer's infrared camera will be more or less color cast during the day. The most direct cause is the problem of the camera filter. Generally, the infrared camera uses a two-pass filter that transmits a certain proportion of infrared light. The advantage is that the cost is low, but because natural light contains more infrared components, it will interfere with color reproduction when it enters the CCD, such as green plants become gray and so on (the outdoor environment with sunlight is especially obvious). The IR-CUT dual filter effectively solves this problem. The IRCUT dual filter consists of an infrared cut filter and a full-spectrum optical glass. When the daytime light is sufficient, the IR cut filter works. The CCD restores the true color. When the night light is insufficient, the infrared cut filter is automatically removed, and the full spectrum optical glass starts to work, so that the CCD makes full use of all the light, thereby greatly improving the infrared performance. The far-sighted Universal IR-CUT is mechanically designed to ensure that it is not color cast during the day and does not run out at night. The infrared effect is well guaranteed.

The five major problems and solutions of infrared cameras: the repeated jumps of critical points

This is because some cameras, whether equipped with IRCUT dual filters or ** filters, cannot work stably in some complicated light environments, and because most manufacturers use simple ones such as photoresistors. Sensors and other methods to control the working state of the IRCUT** filter, the critical point of repeated jumps can not be satisfactory. This part of the thorough solution is the photosensitive linkage internal sensor, controlled by the use of smart chips, its fuzzy logic ability can effectively control the working state of the IRCUT dual filter.

Five common problems and solutions for infrared cameras: heat dissipation

The most important factor affecting the life of the infrared lamp is the temperature. Due to the configuration of the infrared lamp with a large amount of heat, after the infrared lamp is started, there will be heat concentration in the front part of the infrared camera during the whole working period (in 12 hours), which will affect The normal operation of other components such as a video camera. For example, 50 ¢5 infrared light panels, the temperature on the LED board can reach almost 90 degrees for a long time. Since the radiant power of the infrared illuminating LED is proportional to the current, many non-standard manufacturers use the method of increasing the current to increase the illumination effect. However, the higher the current, the higher the temperature. Although the illumination effect is improved, the machine itself is greatly damaged by the overheating of the LED. Among them, the CCD behind the LED board is the most direct victim. The far-sighted infrared integrated machine is powered by a constant current power supply, and uses a pulse width modulation law to keep the infrared lamp current constant, thereby reducing the heat of the infrared lamp, regardless of how the external input current fluctuates, and the current entering the infrared lamp through the circuit. They are very stable, thus ensuring that the infrared lamp exerts its maximum efficiency, prolongs the life, keeps the current constant, controls the heat dissipation of the LED, and the LED lamp board and the outer casing are made of materials such as aluminum alloy, which ensures better long-term operating temperature when the infrared lamp is turned on. Above 50 degrees, the life expectancy can reach more than 30,000 hours.