Wind turbine blades sensors

Functional principle of textile-based piezoresistive carbon filament yarn sensors for application in a wind turbine blade... 

Concept of sensor layout for wind turbine blade... 

In order to evaluate the capability of the integrated CFY sensor networks for the SHM, the small wind turbine blade is mounted horizontally in a fuU-scale semi-beam test rig. Considering its subsequent load case at the wind turbine, the aerodynamically effective suction side of the blade is aligned in a way that the so-called pressure and compression side is subject to tensile stress by normal forces and compressive stress, respectively. 

Krebber, K. Habel, W.R., et al. Fiber Bragg grating sensors for monitoring of wind turbine blades. 17th Int. Conf on Optical Fibre Sensors (OFS-17), Bruges, Belgium, SPIEl-Vol. 5855 (2005), pp. 1036-1039... 

The vane anemometer is an old invention. It can be likened to a small wind turbine with 4-10 rotating blades and a handle, as in Fig. 12.20. Earlier constructions were fully mechanical, where the spindle rotation was transmitted to a pointer through a series of gears. In modern vane anemometers, an electrical sensor records the spindle rotation and the signal is processed, giving the velocity on a digital display. Such an instrument usually is able to integrate the mean velocity over a time interval. 

Figure 15.4 Concept of sensor layout for in situ stmcture monitoring of the turbine blade of a wind turbine.

Habel, W.R. Krebber, K. et al. Fibre Bragg Grating Sensors to Monitor the Rotor Blades of Wind Turbines - Criteria and Method to put them to the Best Possible Use. 7th German Wind Energy Conf DEWEK 2004 (CD-ROM), Wilhelmshaven (2004)... 

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