Kaydedildi:
| Asıl Yazarlar: | , , , |
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| Materyal Türü: | Recurso digital |
| Dil: | |
| Baskı/Yayın Bilgisi: |
Zenodo
2025
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| Konular: | |
| Online Erişim: | https://doi.org/10.5281/zenodo.15018536 |
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İçindekiler:
- <p><em>A thesis submitted in partial fulfillment for the degree of </em></p> <p><em>Doctor of Philosophy </em></p> <p><em>in the Bilbao School of Engineering UPV/EHU. Applied Photonics Group. February 2025.</em></p> <p><br>Industry 5.0 calls for photonic solutions that gather precise, real-time measurements under</p> <p>intense heat, vibration, and electromagnetic fields. Conventional electronics struggle here,</p> <p>often succumbing to interference or limited durability. This dissertation overcomes that</p> <p>gap by developing intensity-based optical fiber displacement sensors (OFDS) that measure</p> <p>linear and angular displacements with high accuracy, extended range, and minimal dead</p> <p>zones.</p> <p>This research closes the loop on OFDS design by uniting theoretical modeling, simulation,</p> <p>and hands-on fabrication. First, a brute-force methodology mapped a broad range of</p> <p>geometries, revealing surprising flexibility even under tight manufacturing tolerances.</p> <p>Next, a concise toy model distilled complex photonic interactions into three key</p> <p>equations—greatly reducing computational overhead while preserving sub-1% agreement</p> <p>with experiments. Building on these insights, we engineered tetra- and pentafurcated</p> <p>OFDS prototypes with extended linear ranges (up to 10.49 mm) minimal dead zones</p> <p>(2.50 mm) and high sensitivity (2.20 mm−1), validated experimentally at a mean square</p> <p>error of 0.25%.</p> <p>Finally, we introduced a heptafurcated optical fiber displacement angular and linear sensor</p> <p>(OFLADS), integrating concentric fiber rings for linear sensing with cross-arranged fibers</p> <p>for angular detection. This single, compact bundle simultaneously measures distance and</p> <p>tilt angles (±15º) without bulky optics or intricate alignment. Prototypes confirmed</p> <p>theoretical predictions, underscoring the viability of the sensor for demanding aero-engine</p> <p>applications.</p> <p>By merging rigorous modeling, efficient design strategies, and empirical testing, this</p> <p>dissertation surpasses state-of-the-art OFDS limitations and completes the circle from</p> <p>conceptual frameworks to fully operational, multi-parameter photonic sensors. The path</p> <p>ahead includes further miniaturization, broader angular detection, and integration with</p> <p>cutting-edge photonic platforms—solidifying OFDS as a key enabler of next-generation</p> <p>aerospace and industrial systems.</p>