Sensor assembly for measuring at least a first torsion of a rotor blade of a wind turbine generator system

US12031886B2 · kind B2 · utility

Assignee

• DR. JOHANNES HEIDENHAIN GMBH · DE

Inventors

• Markus Meissner · Teupitz, DE
• Franz Langrieger · Trostberg, DE
• Siegfried Reichhuber · Stein an der Traun, DE
• Stefan Gilg · Trostberg, DE

Key dates

• Filing date: Dec 7, 2022
• Grant date: Jul 9, 2024
• Expiry date: Dec 7, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/72
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A sensor assembly for measuring a torsion of a rotor blade of a wind turbine generator system includes a first light source configured to generate light and a first transmitter-side polarizer disposed downstream thereof in a direction of light propagation and configured to generate linearly polarized light as a first transmission light. A second light source is configured to generate unpolarized light as a second transmission light. First and second detector elements are arranged and adapted to receive the first and second transmission light. A first receiver-side polarizer is disposed upstream of the first detector element in the direction of light propagation and a second receiver-side polarizer is disposed upstream of the second detector element in the direction of light propagation. An orientation of a polarization plane of the first receiver-side polarizer and an orientation of a polarization plane of the second receiver-side polarizer are different from one another.