Visible “heat”-talk about infrared thermal imaging

With the rapid popularization of big data, artificial intelligence, computer vision technology and the upgrading needs of the manufacturing industry, infrared thermal imaging technology has gradually entered people's field of vision.

Different from the previous visible light, infrared thermal imaging mainly relies on the thermal radiation emitted by objects to construct images, which not only adds a new dimension to machine vision, but also provides more information to professionals and decision-makers.

Principle of infrared thermal imaging

When the temperature of an object is higher than absolute zero (-273), infrared rays carrying characteristic information of the object will continue to be radiated to the surroundings. At the same time, this Infrared radiation also carries information about the characteristics of an object.

Taking advantage of this characteristic, after converting the power signal radiated from the heating part of the object into an electrical signal through a photoelectric infrared detector, the imaging device can simulate the spatial distribution of the surface temperature of the object in one-to-one correspondence, and finally The system processes the thermal image video signal and transmits it to the display screen to obtain a thermal image corresponding to the heat distribution on the surface of the object, that is, an infrared thermal image.

(Principle of infrared thermal imaging)

Advantages of infrared thermal imaging

The principle of infrared thermal imaging is different from that of visible light, as long as there is a temperature difference between objects . In view of this characteristic, infrared thermal imaging has the following advantages:

(1) Strong detection ability and can be effective at long distances;

(2) Passive non-contact detection and identification , strong concealment;

(3) High-precision, long-distance monitoring of multiple targets can be achieved simultaneously in harsh environments;

(4) Under objective conditions such as strong light, The display of the temperature field image on the object surface remains unaffected.

Application fields of infrared thermal imaging

Infrared thermal imaging technology can be widely used in many fields such as environmental protection, inspection and quarantine, fishery supervision, etc., and can provide great benefits for production and life. Convenience.

Forest fire prevention

In large areas of forest, hidden fires that are not obvious can easily cause fires. It is difficult to detect them in time just relying on manual monitoring. By the time they are discovered, they have often developed into An uncontrollable situation.

The infrared thermal imaging camera can perform real-time analysis of the monitoring target by setting the upper limit of the target temperature. If the target temperature reaches the set upper limit, an alarm message will be issued, so that the location and scale of the fire point can be quickly determined, forest fires can be eliminated in the budding stage, and fire hazards can be eliminated.

Epidemic Prevention and Control

Fever is one of the symptoms of infection with the new coronavirus, and temperature measurement has become the first line of defense for epidemic prevention and control.

Using infrared thermal imaging temperature measurement technology, it can quickly detect human body temperature in a non-contact manner and accurately measure human body temperature. When the temperature exceeds the alarm temperature threshold, the device will automatically alarm to remind staff to conduct further body temperature checks. , to achieve rapid and accurate large-area body temperature screening to help epidemic prevention and control.

Fishery Supervision

Illegal fishery activities are usually carried out late at night or in foggy weather, which leads to problems such as many blind spots in law enforcement and difficulty in obtaining evidence.

Infrared thermal imaging equipment finds targets by detecting heat sources, avoiding the shortcomings of traditional supervision that were difficult to detect and identify in dark environments. The monitoring system automatically detects passing ships and captures and retains images, which can replace manual guarding and provide effective evidence.

As an emerging non-destructive testing technology, infrared thermal imaging technology has many advantages such as non-contact, large area, and fast response. With the continuous deepening of research on infrared thermal imaging detection technology at home and abroad, it is believed that infrared thermal imaging technology will play a more important role in more fields.