Search

Your search keyword '"Wegleiter, Hannes"' showing total 109 results
Start Over Author "Wegleiter, Hannes"
109 results on '"Wegleiter, Hannes"'

7. Optoelectronic Strain-Measurement System Demonstrated on Scaled-Down Flywheels.

Author

Rath, Matthias Franz, Birgel, Christof, Buchroithner, Armin, Schweighofer, Bernhard, and Wegleiter, Hannes

Subjects
FLYWHEELS, ENERGY storage, OPTICAL sensors, KINETIC energy, COMPOSITE materials
Abstract

Monitoring the strain in the rotating flywheel in a kinetic energy storage system is important for safe operation and for the investigation of long-term effects in composite materials like carbon-fiber-reinforced plastics. An optoelectronic strain-measurement system for contactless deformation and position monitoring of a flywheel was investigated. The system consists of multiple optical sensors measuring the local relative in-plane displacement of the flywheel rotor. A special reflective pattern, which is necessary to interact with the sensors, was applied to the surface of the rotor. Combining the measurements from multiple sensors makes it possible to distinguish between the deformation and in-plane displacement of the flywheel. The sensor system was evaluated using a low-speed steel rotor for single-sensor performance investigation as well as a scaled-down high-speed rotor made from PVC plastic. The PVC rotor exhibits more deformation due to centrifugal stresses than a steel or aluminum rotor of the same dimensions, which allows experimental measurements at a smaller flywheel scale as well as a lower rotation speed. Deformation measurements were compared to expected deformation from calculations. The influence of sensor distance was investigated. Deformation and position measurements as well as derived imbalance measurements were demonstrated. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

9. Eddy Current Position Measurement in Harsh Environments: A Temperature Compensation and Calibration Approach.

Author

Gruber, Gabriel, Schweighofer, Bernhard, Berger, Matthias, Leitner, Thomas, Kloesch, Gerald, and Wegleiter, Hannes

Subjects
HIGH temperatures, EDDIES, TEMPERATURE, MATERIALS handling, CALIBRATION, DISPLACEMENT (Mechanics)
Abstract

Eddy current displacement sensors (ECDSs) are widely used for the noncontact position measurement of small displacements (lift-offs). Challenges arise with larger displacements as the sensitivity of the ECDSs decreases. This leads to a more pronounced impact of temperature variations on the inductance and, consequently, an increased position error. Design solutions often rely on multiple coils, suitable coil carrier materials, and compensation measures to address the challenges. This study presents a single-coil ECDS for large displacement ranges in environments with high temperatures and temperature variations. The analysis is based on a sensor model derived from an equivalent circuit model (ECM). We propose design measures for both the sensing coil and the target, focusing on material selection to handle the impact of temperature variations. A key part of improving performance under varying temperatures includes model-based temperature compensation for the inductance of the sensing coil. We introduce a method to calibrate the sensor for large displacements, using a modified coupling coefficient based on field simulation data. Our analysis shows that this single-coil ECDS design maintains a position error of less than 0.2% full-scale for a temperature variation of 100 K for the sensing coil and 110 K for the target. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results