Wuhan Guide IR136 Manuel d'utilisateur télécharger pdf (Page 85)

Thermografie in der Theorie und Praxis (INTERNET: www.irPOD.net / e-MAIL: [email protected] ) © Bernd Schindel 2007

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Target

An object in the object plane which the system can focus on and analyze.

Temperature

An expression of thermal energy density. How hot or cold an object is.

Temperature Range

The maximum to minimum temperature display capability of a system. It should be specified whether the

range under consideration is the range displayed, the total display range capability of the system, or the

operating temperature range of the system.

Thermal Conductivity

A property of materials which measures the ability of a material to conduct heat. It can be expressed as

power per degree length (watts/meter-C). Metals have a high thermal conductivity (conduct well) while air

fibers and plastics have much poorer conductivities.

Thermal Expansion

The change of size which materials undergo as their temperature changes. In tight mechanical tolerance

assemblies, the thermal expansion coefficients must be matched to maintain tolerances over an significant

operating temperature range.

Thermal Gradient (or Thermal Profile)

A graph of temperature changes over a distance. A thermal gradient is usually expressed and displayed as

a straight line - sometimes only vertical or horizontal.

Thermal Radiation

Electromagnetic energy whose natural wavelength fall between .7 and 100 microns.

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Wuhan Guide IR136 Manuel d'utilisateur Page 85