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Related Concept Videos

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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution...
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Circular shafts undergoing torsional stress maintain their cross-sectional integrity due to their axisymmetric nature. This symmetry ensures an even distribution of stress, allowing the shaft to withstand torsion without distorting. In contrast, square bars, lacking this axial symmetry, experience significant distortion across their cross-sections when subjected to torsion, with the exception of along their diagonals and at lines connecting midpoints. A detailed examination of a cubic element...
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One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
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Staking out curves is an essential process in construction to ensure the accurate alignment of structures along a curved path. This task involves positioning stakes at calculated locations corresponding to the curve's design, effectively translating plans into physical markers in the field. The process begins by determining the geometric parameters of the curve, including the radius, central angle, and tangent distances. These parameters are critical for identifying key points such as the...
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Magnetic Tweezers for the Measurement of Twist and Torque
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Development of a Procedure for Torsion Measurement Using a Fan-Shaped Distance Meter System.

Martina Goering1, Thomas Luhmann1

  • 1Institute for Applied Photogrammetry and Geoinformatics (IAPG), Jade University of Applied Sciences, Ofener Str. 16/19, 26121 Oldenburg, Germany.

Sensors (Basel, Switzerland)
|October 28, 2023
PubMed
Summary

A new fan-shaped distance meter system (FDMS) enables marker-free measurement of wind turbine rotor blade torsion during operation. This technology achieves high accuracy, crucial for optimizing wind turbine efficiency and lifespan.

Keywords:
camerafan-shaped distance meter systemphotogrammetryrelative orientationrotor blade torsionsensor fusionwind turbine

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Area of Science:

  • Renewable Energy Engineering
  • Mechanical Engineering
  • Aerodynamics

Background:

  • Maximizing wind turbine efficiency is vital for sustainable energy.
  • Rotor blade performance, including deformation and torsion, significantly impacts efficiency.
  • Current monitoring methods often require markers or sensors, limiting operational assessment.

Purpose of the Study:

  • To develop and evaluate a novel system for contactless, marker-free measurement of wind turbine rotor blade torsion during operation.
  • To assess the accuracy and suitability of the fan-shaped distance meter system (FDMS) for precise torsion measurement.
  • To demonstrate the potential of this technology for optimizing wind turbine performance and extending operational life.

Main Methods:

  • Development of the fan-shaped distance meter system (FDMS), integrating multiple laser scanners and photogrammetry.
  • Design and utilization of a specialized torsion simulator for accuracy assessment.
  • Conducting computer simulations and initial laboratory tests to validate measurement capabilities.

Main Results:

  • The FDMS demonstrated precise torsion measurements with an accuracy of 0.3° in simulations and laboratory tests.
  • The system allows for contactless and marker-free data acquisition during wind turbine operation.
  • The method successfully recorded rotor blade deformations, with a focus on torsion.

Conclusions:

  • The FDMS is a suitable and accurate method for measuring wind turbine rotor blade torsion during operation.
  • Marker-free, contactless measurement of blade torsion offers a pathway to targeted performance optimization.
  • This technology holds significant potential for enhancing wind turbine efficiency and extending their service life.