28-06-2010, 06:49 PM
pls feed me up with thermogarphy seminar report and ppt..
28-06-2010, 06:49 PM
pls feed me up with thermogarphy seminar report and ppt..
21-09-2010, 10:09 AM
hi
you can read details about 'thermography' from the below links. https://seminarproject.net/Thread-infrared-thermography https://seminarproject.net/Thread-thermography--1464
27-09-2012, 03:17 PM
THERMOGRAPHY
THERMOGRAPHY.ppt (Size: 2.4 MB / Downloads: 33) Infrared Energy & Radiation Part of electro magnetic spectrum It travels through space at the speed of light. The thermal energy emitted from the surface of a material is called IR radiation. Temperature of an object=IR radiation emitted from it. Eg: x-ray, ultra violet, radio waves. Electromagnetic Spectrum Infrared radiation, visible light & ultra violet light form energy in spectrum. Categorized by wave length & frequency. Human eye can see narrow range of wavelength.(0.4-0.75 micron) Thermography? It’s a - infrared imaging science. - cost effective method. - non invasive method. - non contact method. Applications include building diagnostics, plant maintenance, research, etc. What? IRT is the technique that used for producing a visible image of invisible IR energy emitted by objects. Since wavelength is too long for the sensors in our eyes, IR cameras are used. Where it is used? It can be applied in any situation where a problem or condition can display itself by means of a “thermal difference”. For example, firefighters use it to see through smoke, find persons, and localize hotspots of fires. Cooled IR cameras can also be found at most major astronomy research telescopes. What makes it useful? Its non contact. -uses remote sensing, keeps the user out of danger. It is two dimensional. -thermal patterns can be analyzed, comparison between areas of target is possible. It is real time. -fast scanning of stationary targets, capture of fast moving targets & fast changing thermal patterns. Principle Black body radiation-Black body is that which absorbs completely all the radiations falling on it. The law is associated with “Thermodynamics”. Every object whose surface temperature is above absolute zero (-273 °C) radiates energy at a wavelength corresponding to its surface temperature. Thermographic Camera Produces a live TV image of heat radiation. It converts invisible IR energy into a 2d visual image & displays on std. TV monitor. Thermal image produced is called thermogram. It allows us to see what our eyes can't. It resembles a std. camcorder. |
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