Quality assurance with thermography

The department “Machine Vision and Signal Processing” has various thermographic systems at its disposal, which are used to conduct non-destructive, high-resolution, thermal analyses and quality controls on components, even inline. Active thermography combined with specifically-developed analysis software is an innovative, flexible and efficient diagnosis method. It is capable of reliably and rapidly identifying defects, such as delamination, joining errors, cracks or cavities, both on the surface and near the surface of component interiors.

To identify defects and errors with active thermography, a test object is specifically heated and the spread of heat carefully observed. By selecting a suitable energy input (excitation by means of radiation, ultrasound or eddy currents) and temporal excitation sequence (pulse excitation, modulation), areas with an abnormal heat flow pattern are identified.

Our extensive experience in industrial image processing enables us to analyze your workpieces with active thermography. Our services include:

  • Feasibility studies and services
  • Selection and optimization of energy inputs
  • Development of algorithms to identify defects
  • Integration into the manufacturing process

 

Inspecting composite components made from CFRP/GFRP

The use of composite components is rising fast, especially in the automobile industry. A fast and reliable inspection technique is required to monitor quality during production processes. A thermographic inspection system automatically identifies defects and is ideal for this purpose.

 

Thermography for inspecting metallic materials

When inspecting metallic components for defects on or just below the surface, active thermography can be utilized to detect a wide range of flaws. For example, cavities or cracks are selectively identified using electromagnetic or mechanical waves.

 

Evaluating joins and mounted subassemblies

It is often extremely difficult to evaluate material or force-fit joins with standard techniques. The method of active thermography offers interesting alternatives.

 

Thermography in lightweight engineering

The rising importance of lightweight engineering and the use of composite materials call for new, efficient evaluation methods. Active thermography can be implemented to identify a wide range of defects and inhomogeneities in order to assure component quality.

 

Detecting micro cracks, e.g. in solar cells

In the manufacture of solar cells, cracks can occur when transporting and handling the silicon wafers during production. These impair the function and longevity of solar cells. A thermographic inspection system detects micro cracks reliably and automatically.

 

Special areas of thermography in non-industrial applications

Thermography also opens up new possibilities regarding non-industrial applications and can be used to supplement other inspection methods. For example, it is implemented successfully on animals and humans in the field of medicine as well as to assess works of art in the art world and in applications in archeology and biology.