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From analog surveillance to digital surveillance, from standard definition to high definition, from visible light to infrared, video surveillance has undergone tremendous development and changes, especially the application of infrared thermal imaging technology in the field of video surveillance has expanded the scope of surveillance applications, providing cameras at night. It has created a pair of "see-through eyes" in harsh environments, and IR thermography cameras play a vital role in the development of the entire security industry.


1. Reasons for using IR thermography cameras for applications in the field of intelligent security


At night and in harsh weather conditions, infrared thermal imaging monitoring equipment can monitor various targets, such as personnel and vehicles. At night, visible light equipment can no longer work properly, and the observation distance is greatly shortened. If artificial lighting is used, it is easy to expose the target. If the low-light night vision device is used, it also works in the visible light band, and still needs external light illumination. It can work in the city, but when working in the field, the observation distance is greatly shortened. The infrared thermal imager passively receives the infrared thermal radiation of the target itself, which has nothing to do with the climatic conditions. It can work normally regardless of the day or night, and can avoid exposing itself.


Especially in harsh weather conditions such as rain and fog, due to the short wavelength of visible light, the ability to overcome obstacles is poor, so the observation effect is poor, or even cannot work, but the wavelength of infrared rays is long, and the ability to overcome rain, snow and fog is high. So the target can still be observed normally at a longer distance. Therefore, in the field of intelligent security, infrared thermal imager is a very effective device.


2. The specific application of IR thermography camera in the field of intelligent security


( 1 ) Fire monitoring


Since the infrared thermal imager is a device that reflects the surface temperature of an object, in addition to being used for on-site monitoring at night, it can also be used as an effective fire alarm device. In a large area of forest, fires are often caused by inconspicuous hidden fires of. This is the root cause of devastating fires, and it is difficult to detect such hidden fire signs with existing ordinary methods. The application of infrared IR thermography cameras can quickly and effectively find these hidden fires, and can accurately determine the location and scope of the fire, find the ignition point through the smoke, and achieve early knowledge, early prevention, and early extinguishment.


( 2 ) Identification of camouflage and concealed targets


Ordinary camouflage is mainly to prevent visible light observation. Ordinary criminals usually hide in the grass and woods. At this time, if the observation method of visible light is adopted, due to the harsh field environment and human visual illusion, it is easy to make wrong judgments. The infrared thermal imaging device passively accepts the thermal radiation of the target itself. The temperature and infrared radiation of the human body and the vehicle are generally far greater than the temperature and infrared radiation of the vegetation, so it is not easy to camouflage, and it is not easy to make wrong judgments. In addition, ordinary people do not know how to avoid infrared surveillance. Therefore, the infrared thermal imager has obvious effect in identifying camouflage and concealed targets.


(3) Road monitoring at night and under severe weather conditions


Because infrared thermal imaging system has many advantages in observing and identifying targets, it has been widely used in the fields of highways, railway night security patrols, and night city traffic control in many developed countries.


( 4 ) Security and fire monitoring of key departments, buildings and warehouses


Since the infrared thermal imager is a device that reflects the temperature of an object, it can be used for on-site monitoring of key departments, buildings, warehouses, and residential areas at night. Since this device is an imaging device, it works reliably and can greatly reduce false positives. alarm rate. People hiding in the trees, road traffic watch, suspects hiding in the dark.


( 5 ) Land and port traffic security


With the expansion of urban traffic and the extension of highways, railways and waterways, traffic safety has become a huge problem, especially at night or in foggy and rainy harsh environments, it becomes a problem. Cars or ships equipped with IR thermography cameras today can avoid traffic accidents at night or in harsh environments.


IR thermography cameras have covert detection because there is no need for light, so you save yourself the expense of making visible light, and intruders won't even know they're being watched. Moreover, it can continuously work through heavy smoke, dense fog, rain, smoke clouds and other harsh conditions, with a visual distance of several kilometers, which is very suitable for border patrol, violence defense, night reconnaissance, industrial intelligent security, equipment intelligent security, dock and port intelligent security, commercial Intelligent security and other fields.

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