What is thermography?


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Explaining the benefits of thermography. For an animated version, please download a copy to view on your PC.

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What is thermography?

  1. 1. Testo UK Ltd.What is thermography?2012 Testo UK Ltd.
  2. 2. Hello & Welcome Ever wondered what Thermography is and what it can be used for? In this short presentation we demonstrate the science behind the technique and the areas in which this technology will be beneficial.Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 2/2
  3. 3. Discovery of infrared radiation around 1800 by Friedrich Wilhelm Herschel in England Sir Friedrich Wilhelm Herschel (* 15th November 1738 in Hanover; † 25th August 1822 in Slough) was a German-British astronomer and musician. Physicist Max Planck proved as far back as 1900, that there is a correlation between the temperature of a “Body” and the Intensity of the Infrared Radiation that it emitsTesto AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 3/2
  4. 4. Thermal, or infrared energy, is light that is not visible because its wavelength is too long to be detected by the human eye; its the part of the electromagnetic spectrum. Unlike visible light, in the infrared world, everything with a temperature above absolute zero emits heat. Even very cold objects, like ice cubes, emit infrared. The higher the objects temperature, the greater the IR radiation emitted. Infrared allows us to see what our eyes cannot.Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 4/2
  5. 5. Thermal Imaging / Thermography is the conversion of Infrared Radiation into Thermal images. A thermal image is an analogue pictorial representation or visualisation of temperature differences. All objects above absolute zero (-273 degrees) emit radiation, some of which is infra-red. Depending on temperature and emissivity, most objects in the world can be thermally imaged. Thermal imagers detect and record Infra-red radiation emitted from the surface of any subject being viewed. The imager does not have the ability to see below the surface. However, the radiation from the surface is often influenced by sub-surface detail, which effects the thermal characteristics of adjoining material(s).Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 5/2
  6. 6. A special lens focuses The thermogram created by the infrared light the detector elements is emitted by all of the translated into electric objects in view. impulses. I FPA-Camera (Focal PlaneThe focused light is scannedby a phased array of infrared- Array) The impulses are sent to a signal-detector elements. The processing unit, a circuit board IR with a dedicated chip thatdetector elements create a Opticvery detailed temperature translates the information from thepattern called a thermogram. elements into data for the display. 2 dim.It only takes about one-thirtieth Detector- The signal-processing unitof a second for the detector Matrix sends the information to thearray to obtain the temperature display, where it appears asinformation to make the various colours depending onthermogram. the intensity of the infrared emission.This information is obtained from The combination of all the impulsesthousands of points in the field of from all of the elements creates theview of the detector array. image.Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 6/2
  7. 7. What are the benefits? • Non-contact process / Non Intrusive • Can safely see /visualise, temperatures of components, moving objects, thermal patterns, very hot objects (Up to 2000°C) and high voltage objects • Thermal Imaging gives us an overall temperature profile of the subject rather than the temperature at one point • A thermal image gives a visual indication of temperature differences and when it is a Radiometric Thermal Image, it will also give temperature measurement. 65.6°C 60 50 40 31.7°CTesto AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 7/2
  8. 8. Where can thermal imagers be used? • Building Fabric Investigations • Electrical Equipment Surveys • Mechanical Equipment Surveys • Heating Systems & Pipe Location • UPS Battery Systems • Chilled Ceilings • IT Cooling Systems • System / Process Testing / Product Design • Medical / Equine Veterinary • And Many Many MoreTesto AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 8/2
  9. 9. Thermal Imaging provides a visualisation of temperature differentials which can help to identify anomalies / faults. Thermal Imaging allows you to see more. To See More – Is to Know MoreTesto AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 9/2
  10. 10. info@testo.co.ukwww.testolimited.com01420 544433Testo AG, Präsentationstitel (Version), Ersteller, Datum, Vertraulichkeitsstufe 10/2