Condition monitoring apparatus for wind turbine
US10100815B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 3, 2014 |
| Grant date | Oct 16, 2018 |
| Priority date | — |
| Expiry date | Oct 16, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Frequency analysis units are configured to perform a frequency analysis of vibrations detected by vibration sensors, respectively. A natural frequency detection unit is configured to detect a natural frequency of a wind turbine in accordance with a direction of a nacelle, based on results of the frequency analysis. A change ratio calculation unit calculates a decrease ratio in the natural frequency detected by the natural frequency detection unit. An abnormality detection unit determines that an abnormality is present in the wind turbine if the decrease ratio in the natural frequency calculated by the change ratio calculation unit exceeds a threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.