Thermogram of a rotor blade during cooling

Thermogram of a rotor blade during cooling

Source: BAM

Wind turbine rotor blades, onshore as well as offshore, are exposed to extreme stress and therefore need regular maintenance. Up to now, industrial climbers conduct a visual inspection of the rotor blades in combination with tap testing to detect any structural faults.

Active thermography is an upcoming method used for rotor blade inspection. It involves applying heat to the surface of a rotor blade and observing the temperature distribution by using a thermographic camera. Thermography enables maintenance workers to inspect rotor blades for deep-seated defects more quickly because it does not require any contact.

“We aim to develop thermographic methods further so that they can be used effectively and reliably – during the production and in the field,” explains Dr. Rainer Krankenhagen who is an expert for thermographic methods at the Bundesanstalt für Materialforschung und -prüfung (BAM).

Visitors can receive comprehensive information about the project Thermofas at the stand of the Federal Ministry for Economic Affairs and Energy (BMWi) (stand C28 in the Research & Technology area in hall 2). The project focuses on using thermography to assess the quality of fibre composites for the wind energy industry.

The main theme of BAM’s exhibition this year is additive manufacturing. Under the slogan "We add Safety to Additive Manufacturing” visitors will be able to gain insight into BAM's research in this area. Additionally, BAM is presenting its commitment to promoting spin-offs. The BAM stand is also located in the Research & Technology area in hall 2 (stand C51).

The publication "Additive Manufacturing at BAM - Safety in Focus" provides an overview of the wide range of our research in this area: www.bam.de/am-broschuere