We demonstrated the damage localization capabilities in a radar-based structural health monitoring system. An article has been accepted for publication in Wind Energy journal (John Wiley & Sons Ltd).
This short communication reports on a radar approach for structural health monitoring of wind turbine blades. Therefore, a bistatic FMCW radar in the frequency range from 33.4 GHz to 36.0 GHz has been developed and tested experimentally using a laboratory wind turbine demonstrator. A differential damage localization framework is presented here that exploits signal differences between measurements from the intact and the damaged structure for 3D imaging of the defect. We have achieved the localization of a 30 mm cut in a glass fiber composite structure as well as the localization of a water pack at the backside of the specimen with a localization error of several centimeters.
Arnold, P.; Moll, J.; Mälzer, M.; Krozer, V.; Pozdniakov, D.; Salman, R.; Rediske, S.; Scholz, M.; Friedmann, H. & Nuber, A., Radar-based Structural Health Monitoring of Wind Turbine Blades: The Case of Damage Localization, Wind Energy, 2018 (accepted January 2018)