(19)
(11) EP 4 537 070 A1

(12)

(43) Date of publication:
16.04.2025 Bulletin 2025/16

(21) Application number: 22732572.7

(22) Date of filing: 13.06.2022
(51) International Patent Classification (IPC): 
G01M 5/00(2006.01)
(52) Cooperative Patent Classification (CPC):
G01M 5/0016; G01M 5/0066; G01M 5/0075
(86) International application number:
PCT/EP2022/066009
(87) International publication number:
WO 2023/241778 (21.12.2023 Gazette 2023/51)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(71) Applicants:
  • Nordex Energy SE & Co. KG
    22419 Hamburg (DE)
  • Wölfel Engineering GmbH + Co. KG
    97204 Höchberg (DE)

(72) Inventors:
  • MAGNUS, Stefan
    22419 Hamburg (DE)
  • RAUTMANN, Christof
    22419 Hamburg (DE)
  • RIEKE, Johannes
    22419 Hamburg (DE)
  • HELLMICH, Bernd
    22419 Hamburg (DE)
  • ENGELHARDT, Jürgen
    97249 Eisingen (DE)
  • HOFMANN, Jörg
    97209 Veitshöchheim (DE)
  • KATZ, Sebastian
    97082 Würzburg (DE)

(74) Representative: Epping - Hermann - Fischer 
Patentanwaltsgesellschaft mbH Schloßschmidstraße 5
80639 München
80639 München (DE)

   


(54) EIGENFREQUENCY MEASURING DEVICE AND SYSTEM FOR DETERMINING AN EIGENFREQUENCY OF A WIND TURBINE ROTOR BLADE