[en] Fused silica glass is a material with outstanding mechanical, thermal and optical properties. Being a brittle material, it is challenging to shape. In the last decade, the manufacturing of monolithic flexible mechanisms in fused silica has evolved with the femtosecond-laser-assisted etching process. However, instrumenting those structures is demanding. To address this obstacle, this article proposes to inscribe a Bragg Grating sensor inside a flexure and interface it with an optical fibre to record the strain using a spectrum analyser. The strain sensitivity of this Bragg Grating sensor is characterized at 1.2 pm/μϵ (1 μϵ = 1 microstrain). Among other applications, deformation sensing can be used to record a force. Its use as a micro-force sensor is estimated. The sensor resolution is limited by our recording equipment to 30 μN over a measurement range above 10 mN. This technology can offer opportunities for surgery applications or others where precision and stability in harsh environments are required.
Disciplines :
Mechanical engineering
Author, co-author :
Amez-Droz, Loïc ✱; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; TIPs Department, CP 165/67, Université libre de Bruxelles, 50 av FD Roosevelt, 1050 Brussels, Belgium
Tunon de Lara, Matéo ✱; TIPs Department, CP 165/67, Université libre de Bruxelles, 50 av FD Roosevelt, 1050 Brussels, Belgium ; Electromagnetism and Telecommunication Department, University of Mons (UMONS), Boulevard Dolez 31, 7000 Mons, Belgium
Collette, Christophe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Active aerospace structures and advanced mechanical systems ; BEAMS Department, CP 165/56, Université libre de Bruxelles, 50 av FD Roosevelt, 1050 Brussels, Belgium
Caucheteur, Christophe ; Electromagnetism and Telecommunication Department, University of Mons (UMONS), Boulevard Dolez 31, 7000 Mons, Belgium
Lambert, Pierre ; TIPs Department, CP 165/67, Université libre de Bruxelles, 50 av FD Roosevelt, 1050 Brussels, Belgium
✱ These authors have contributed equally to this work.
Language :
English
Title :
Instrumented Flexible Glass Structure: A Bragg Grating Inscribed with Femtosecond Laser Used as a Bending Sensor.
Publication date :
22 September 2023
Journal title :
Sensors
ISSN :
1424-8220
eISSN :
1424-8220
Publisher :
Multidisciplinary Digital Publishing Institute (MDPI), Switzerland
This research was funded by the “Fonds de la Recherche Scientifique” Research project grant INFuSE (grant number FNRS PDR T.0049.20 and GEQ FEMTOPrint U.G025.19F).
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