Integrated Optical Deformation Measurement with TIR Prism Rods

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Translated title of the contributionIntegrierte optische Verformungsmessung mit TIR-Prismenstäben
Original languageEnglish
Article number943
Number of pages18
JournalSensors
Volume23
Issue number2
Publication statusPublished - 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.

Keywords

    Optical Measurement, Integrated Measurement, Prism Rods, Deformation, Torsion, Condition Monitoring, Total Internal Reflection, Decency Level of Sensitivity, optical measurement, decency level of sensitivity, integrated measurement, prism rods, torsion, deformation, condition monitoring, total internal reflection

ASJC Scopus subject areas

Cite this

Integrated Optical Deformation Measurement with TIR Prism Rods. / Wolf, Alexander Gordon.
In: Sensors, Vol. 23, No. 2, 943, 13.01.2023.

Research output: Contribution to journalArticleResearchpeer 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 ; Vol. 23, No. 2.
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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.",
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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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