Sensor arrangement for a wind turbine

1. A sensor arrangement for use on a wind turbine comprising:

a sensor group of rotor blade-related sensors which is arranged in or on a rotor blade and comprises elongation and vibration sensors; and

at least one non-rotor blade-related sensor,

wherein sensor signals associated with the rotor blade-related sensors are processed by fusion with sensor signals associated with the at least one non-rotor blade-related sensor, and

wherein the fusion of the sensor signals associated with the rotor blade-related sensors and the sensor signals associated with the non-rotor blade-related sensors is performed depending on an operating state of the rotor blades.

2. The sensor arrangement according to claim 1 , wherein the rotor blade-related sensors and/or the at least one non-rotor blade-related sensor are/is configured for optically, electrically and/or magnetically generating the sensor signals.

3. The sensor arrangement according to claim 1 , wherein the rotor blade-related sensors and/or the at least one non-rotor blade-related sensor each provide/s a pressure signal, an acceleration signal, a temperature signal, a vibration signal, an elongation signal, an ice amount signal and/or a sound emission signal.

4. The sensor arrangement according to claim 1 , wherein the at least one non-rotor blade-related sensor is arranged in or on one or more of the following structures of the wind turbine: rotor hub, tower, nacelle.

5. A wind turbine including a sensor arrangement according to claim 1 .

6. The wind turbine according to claim 5 , including a controller for acquiring and processing sensor data detected by the sensor arrangement.

7. A method for operating a wind turbine according to claim 5 , the method comprising:

acquiring sensor data detected by the sensor arrangement; and

processing the sensor data.

8. The method according to claim 7 , wherein processing includes calibrating the rotor blade-related sensors, wherein the at least one non-rotor blade-related sensor is taken into account in the calibrating.

9. The method according to claim 7 , wherein processing an event includes recognizing lightning strike.

10. The method according to claim 7 , wherein processing includes processing the sensor data of the rotor blade-related sensors by fusion with the sensor data of the at least one non-rotor blade-related sensor.

11. The method according to claim 7 , wherein processing includes validating the sensor data of the rotor blade-related sensors with the sensor data of the at least one non-rotor blade-related sensor.

12. The method according to claim 7 , wherein processing includes classifying.

13. The sensor arrangement according to claim 1 , wherein the fusion of the sensor signals associated with the rotor blade-related sensors and the sensor signals associated with the non-rotor blade-related sensors is performed depending also on a threshold value of the operating state of the rotor blades.

14. The sensor arrangement according to claim 13 , wherein the threshold value is an upper threshold value, which, when exceeded by the operating state of the rotor blades, fusion is not performed.

15. The sensor arrangement according to claim 14 , wherein the upper threshold value is an upper threshold of rotor speed.