IR Camera Range
Active thermography is the induction of a heat flow by energetically exciting a test object. The heat and the flow of energy is then influenced by defects or material layers which makes it a great application for materiel testing. These inhomogeneities can be sen on the surface by high-precision infrared cameras such as our ImageIR and Variocam range.
Our range of cooled IR cameras are perfect for any active thermography application within the engineering, health or automotive industries. The cooled cameras allow for a more accurate temperature measurement at a higher resolution. The range of thermal cameras has geometric resolutions of up to (1,280 x 1,024) IR pixels and thermal resolutions far below 0.015 K. As well as this, there is optional high temperature calibrations allowing the measurement of materials such as metal and others with high heat conductivity
The thermography software IRBIS® 3 active analyses the thermo-graphic sequences, which have been generated during the test, and edits them to create a false colour image, in which defects can be marked for further evaluation or documentation. For this purpose, several different analysis procedures are available. The choice of the correct algorithm depends on the material characteristics, geometry and type of defects to be detected.
While the quotient method investigates the heat flow of the test object by reference to the increase and decrease of the surface temperature, the pulse-phase thermography (PPT) relies on the analysis of the temperature profile of different frequencies. For each frequency, two event images are generated, one amplitude- and one phase image. The lock-in thermography (LIT) analyses the sequence of periodic excitation of the test object.
Application of Active Thermography]
Active thermography has a number of applications, however is mainly used in manufacturing and material testing. Some specific applications include:
- Detection of layer structures, delaminations and inserts in plastics
- Detection in CFRPs of the automotive and aerospace industry
- Investigation of interior structures or impacts on honeycomb lightweight constructions
- Recognition of deeper material deficiencies, such as blowholes in plastic parts or ruptured laser welding seams