Among other things, our sensor systems detect ice, determine the surface temperature and measure the relative pitch angle in all operating conditions of your turbines.
With our sensor technology, we ensure that wind turbines run optimally in all weather conditions and achieve optimum performance. This is how we create sustainable values for our customers and for the environment.
Detects changes as they occur
Tested and awarded by leading certification bodies and foundations, including TÜV Nord, DNV and Solar Impulse Foundation. In use by several major wind turbine manufacturers and companies worldwide.
other blade-based IDS
Outside on the blade surface
Inside the rotor blade
Min. required wind speed for ice detection
SCADA data required
Calibration for ice detection
Automatic restart possible
yes, starting at 2-3m/s
Self-adhesive on the blade
Glued inside the blade
Measurement of relative pitch angles
yes – continously
no (partial imbalance indicator)
eologix vs. ground-based systems for pitch angle measurement
In contrast to ground-based systems, the eologix:align system detects relative pitch angle errors at an early stage through continuous monitoring and provides an automatic warning message. The eologix system can be used at any location (including forest, offshore, etc.) as well as on any wind turbine and also offers the possibility of correlation with turbine data (including evaluation of pitch via rotor speed).
eologix pitch angle monitoring:
eologix vs. nacelle-based ice detection
The flow conditions at the nacelle are different from those at the rotor blade. On the one hand, these are naturally due to the rotation of the rotor blades, on the other hand to the different heights above ground. Especially due to the trend towards even larger rotor diameters and increasing tower heights, an ever greater effect can be foreseen here in the future.
Due to this situation, the sensors must be designed to be correspondingly sensitive and conservative in order to be able to reliably detect ice accumulation. However, this can lead to the turbine being shut down earlier than actually needed. Furthermore, the measurement on the nacelle cannot determine at what point the icing on the rotor blades is gone again. Therefore, no automatic restart is possible with such systems.
eologix vs. other blade-based systems for ice detection
Completely different technologies – vibration-based systems measure indirectly inside the blade and thus conclude on ice, and always need a minimal excitation of the rotor blades by the wind. These systems use the change in the eigenfrequency of the blades to draw conclusions about possible ice accumulation. Therefore, no ice can be measured when the turbine is idling or at a standstill, which means that no ice can be detected during this period – furthermore, the systems need data from the wind turbine in order to work.
Best-in-class: Independent study from VGB
In the course of the VGB project, a comprehensive field test was carried out in which four rotor blade-based ice detection systems were installed and tested on the same wind turbine.
The field test was carried out at the Stor-Rotliden wind farm in Västerbotten, Sweden on a Vestas V-90.
Results for the eologix ice detection system: