METHOD AND DETECTION ASSEMBLY FOR THE DETECTION OF CHANGES IN A BUILDING STRUCTURE OF A WIND TURBINE

摘要

Method and detection assembly for the detection of changes in a building structure of a wind turbine The invention concerns a method for the detection of changes in a building structure of a first wind turbine (Ia). Thereby a reference value (errorSig, errorSig_c) representing the eigenfrequency of the first wind turbine (1a) is monitored over time and whereby substantial changes in the reference value (errorSig, errorSig_c) are used as an indication of changes in the building structure. The invention also concerns a detection assembly (9a) for such detection.