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Thermal Ground
The Versatile Thermal Cameras
The Thermal Cameras are technology devises that use infrared radiation for producing images. They perform varied tasks: Civil, Military, Research and Development, Medical and Surveillance. A normal camera is light sensitive, where as these are heat sensitive.
Everyone is familiar with the common camera that uses visible light for imaging. The Thermal Cameras on the other hand are devices that use infrared radiation for image producing. They operate in very long wave lengths of 14,000 nanometres. All objects of temperature emit a black body radiation in different amounts; higher the temperature greater the emission of black body radiation. They can work in complete darkness since they can detect radiation just as an ordinary camera would detect visible light.
Uses of Thermal Cameras are diverse. They are used in fire fighting operations as the these cameras can see through smoke and detect the hot spot thereby saving the valuable time in rescuing people trapped in buildings that are on fire. They are particularly useful in masonry wall structure analysis, and detecting leaks, gaps or holes or even moisture in the wall, roof and ground. They are also used by the military and law enforcement departments in anti- terrorism. They are very useful in Search and Rescue operations and Quarantine monitoring of visitors. They assist in Research and Development, Archaeology, particularly in the medical field, where it is possible to detect cancerous cells in advance.
There are two major types of Thermal Cameras, the cooled infrared detectors and the not cooled infrared image detectors. The cooled detectors are cryogenically cooled, contained in a vacuum- sealed case. Cooling is necessary because the sensors are blinded by their own radiation. These cooled infrared cameras consume more power and more time as they need to be cooled often for proper functioning. These cameras produce superior quality images compared to the not cooled ones, though expensive and bulky. The not cooled infrared detectors are not cooled to low temperatures, hence are less expensive and smaller. The not cooled ones use sensors at ambient temperature.
While buying the Thermal Cameras, one has to ascertain whether he wants to buy the simple inexpensive hand held models or the fix mounted units that could be moved to different places. It depends entirely on for what purpose they are used. One also has to ensure they have built in features needed for the job they are intended. To get accurate readings, the camera should be able to adjust to emissivity settings.
It is advisable to buy Thermal Cameras from the manufacturers. One has to be trained to use and get a demo of different models before buying. A comprehensive list of the devise would be available on the Internet. They are also available for rent.
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Thermal Imaging can it see into the ground????
I understand thermal imaging and the use of it etc. but can thermal imaging see into the ground? and if so how deep?
Do you know what they use to find something like a building in the ground?
If the underground building is at a different temperature than the surrounding and overlying dirt then you might be able to pick up a temperature signature from the underground building. Whether or not you can will depend on the thermal conductivity of the soil (dry soil conducts heat less well than moist soil), how well insulated the building is, the thermal contrast, and how deep the building is buried.
Infrared remote sensing can be used to detect buried objects, there was an instance in the early days of IR imaging when a helicopter-mounted imager found a group of hikers in a snow cave on Mt Hood, Oregon (it was in the mid-80's).
However, the IR imager is not seeing into the ground as such. It is measuring a surface thermal signature of buried objects. It can't give you an image of something underground. So you could maybe tell something was buried somewhere, and maybe see a general outline, but you couldn't see how deep it was or much detail about it's structure in the vertical dimension. Ground-penetrating radar or seismic techniques can provide (at least in a limited sense) images of buried objects.
MW2 Ground War Invasion Tar-21 w/Thermal