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Can thermal imaging cameras really penetrate walls?

Release time: 2019/12 / 03Browse number : 513Publish source: Site
Author: Shenzhen Huarui Technology Co., Ltd.
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Abstract: In recent years, thermal imaging cameras have become more and more widely used, but many people do not know much about thermal imaging technology. Some people think that it is "not worthy of the name", but in fact it can penetrate nothing; some people think that it is "omnipotent" and can penetrate everything. Today, Xiao Fei will give you a little science about infrared thermal imaging ~ Can thermal imaging penetrate walls?

Key words:

In recent years, thermal imaging cameras have become more and more widely used, but many people do not know much about thermal imaging technology. Some people think that it is "not worthy of the name", but in fact it can penetrate nothing; some people think that it is "omnipotent" and can penetrate everything. Today, Xiao Fei will give you science knowledge about infrared thermal imaging ~


Can thermal imaging penetrate walls ?


The editor tells you clearly that from the current technology, thermal imaging cannot penetrate walls! Speed and Passion: Watch Jushi Johnson, how to use infrared camera to seize the opportunity in battle! This movie exaggerates the effect of the thermal imager ~ In our lives, the walls are generally thick enough and the insulation is enough to block the infrared radiation on the other side. If you point an infrared camera at a wall, it will detect the heat from the wall, and the heat behind it will be "untouchable." However, if something inside the wall can cause a sufficient temperature difference, the camera can also sense it on the surface of the wall. For example, building maintenance professionals often use thermal imaging cameras to detect problems such as water leaks or missing insulation without having to disassemble the walls to evaluate the problem.



Studs (vertical lines) inside the wall are cooler than the insulation, causing a temperature difference on the wall surface



Can thermal imaging penetrate smoke?


Infrared cameras can detect heat through penetrating smoke. Although the smoke particles in the smoke effectively block visible light, they cannot block infrared radiation. At present, infrared cameras are widely used in the fire protection industry. For example, the KT384 series infrared camera is designed for the extreme heat and smoke environment encountered by firefighters at work. It displays a clearer thermal image on a bright LCD, and can easily pass through a fire and make decisions.



People at the door are obscured by smoke in the visible light spectrum, but are easily detected by thermal imaging



Can thermal imaging penetrate concrete?


The answer to this question is basically similar to whether it can penetrate a wall, but the thermal imager may detect something inside the concrete, such as pipes or radiant heating, resulting in a temperature difference from the concrete surface, so that it can be used by infrared cameras catch!



Underfloor heating pipes are clearly visible under the concrete floor


Can thermal imaging penetrate metal?


In the field of thermal imaging, metal can be a tricky material. Any smooth or polished metal object can reflect infrared radiation, which can make it difficult for anyone monitoring pipes or mechanically overheated parts. But oxidized metals or metals coated with matte are easier to measure accurately. An infrared camera may never “penetrate” a metal object, but the temperature difference caused by the internal materials of the metal will reflect on the metal surface. In this way, the inspection effect can also be achieved by viewing with an infrared camera.


It's easy to see how full these jars are with an infrared camera because the liquid inside creates a temperature difference on the metal surface




Can thermal imaging penetrate plastic?


We can do an interesting little experiment with an infrared camera : lift a thin, opaque plastic sheet (such as a garbage bag) in front of a warm object or person. Infrared radiation will penetrate the plastic, allowing a thermal camera to detect things with temperature behind the plastic, while visible light is blocked. But to be clear, this technique only works for very thin plastics, and thick plastics block infrared radiation.



Visible light is mostly blocked by plastic bags, but infrared radiation can penetrate




Can thermal imaging penetrate the darkness?


Yes, of course! Take it! of! Thermal imaging is not affected by darkness at all and does not require visible light to show heat.



In the dark, the camera can catch things clearly



Watched the popular science of Xiaobian


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