Integrated Optical Deformation Measurement with TIR Prism Rods

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • Alexander Gordon Wolf

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Details

Titel in ÜbersetzungIntegrierte optische Verformungsmessung mit TIR-Prismenstäben
OriginalspracheEnglisch
Aufsatznummer943
Seitenumfang18
FachzeitschriftSensors
Jahrgang23
Ausgabenummer2
PublikationsstatusVeröffentlicht - 13 Jan. 2023

Abstract

In this paper, a novel optical measurement principle for deformation, especially torsion, is presented. A laser beam is guided via total internal reflection (TIR) in a prism rod. Every single reflection causes an increasing change in the beam path, which can be measured by its effect on the outcoupling position of the laser. With a diameter of the prism rod of 10 mm and a length of 120 mm, the system achieves torsion sensitivities between 350 µm/◦ and more than 7000 µm/◦, depending on the actual torsion angle ϕ. A decency level of sensitivity is defined for comparison, which is exceeded by a factor of ∼ 55 at ϕ = 0. The presented principle of TIR prism rods can be adapted to measure different load cases. Using two laser beams, bending and torsion can be distinguished and combined load cases analyzed. The resulting system can be integrated into machine elements, such as screws, to perform condition monitoring on mechanically loaded components.

Schlagwörter

    Optische Messtechnik, Integrierte Messtechnik, Prismenstäbe, Verformung, Torsion, Zustandsüberwachung, Totalreflexion, Signifikanzlevel der Sensitivität

ASJC Scopus Sachgebiete

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Integrated Optical Deformation Measurement with TIR Prism Rods. / Wolf, Alexander Gordon.
in: Sensors, Jahrgang 23, Nr. 2, 943, 13.01.2023.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Wolf AG. Integrated Optical Deformation Measurement with TIR Prism Rods. Sensors. 2023 Jan 13;23(2):943. doi: 10.3390/s23020943
Wolf, Alexander Gordon. / Integrated Optical Deformation Measurement with TIR Prism Rods. in: Sensors. 2023 ; Jahrgang 23, Nr. 2.
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N2 - In this paper, a novel optical measurement principle for deformation, especially torsion, is presented. A laser beam is guided via total internal reflection (TIR) in a prism rod. Every single reflection causes an increasing change in the beam path, which can be measured by its effect on the outcoupling position of the laser. With a diameter of the prism rod of 10 mm and a length of 120 mm, the system achieves torsion sensitivities between 350 µm/◦ and more than 7000 µm/◦, depending on the actual torsion angle ϕ. A decency level of sensitivity is defined for comparison, which is exceeded by a factor of ∼ 55 at ϕ = 0. The presented principle of TIR prism rods can be adapted to measure different load cases. Using two laser beams, bending and torsion can be distinguished and combined load cases analyzed. The resulting system can be integrated into machine elements, such as screws, to perform condition monitoring on mechanically loaded components.

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