Distributed optical fiber sensor technology for bite force mapping

Zhanerke Katrenova; Shakhrizat Alisherov; Madina Yergibay; Zhanat Kappassov; Daniele Tosi; Carlo Molardi

doi:10.1117/12.2687664

27 November 2023 Distributed optical fiber sensor technology for bite force mapping

Zhanerke Katrenova, Shakhrizat Alisherov, Madina Yergibay, Zhanat Kappassov, Daniele Tosi, Carlo Molardi

Author Affiliations +

Proceedings Volume 12771, Advanced Sensor Systems and Applications XIII; 127710I (2023) https://doi.org/10.1117/12.2687664
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Abstract

Measuring bite force gives important information about the performance of the jaw muscles. Enhancement of bite force measurements, particularly 2D force mapping, can be achieved through the application of advanced distributed fiber optics sensing techniques, which present the capability to acquire high resolution measurements. Optical Backscatter Reflectometry (OBR), based on the principles of Optical Frequency Domain Reflectometry (OFDR), is the key to achieve spatially distributed measurements and transform a single-mode fiber (SMF) into a cost-effective minimally invasive sensor. The OBR interrogator, manufactured by LUNA, catches the light backscattered by each section of the fiber and detects the spectral variation induced by the stain and pressure application. We have developed two methods to construct a two-dimensional map of the applied bite force. In the first a SMF has been bent into four lines and embedded into a silicone mouthguard. In the second approach we used massive Scattering‑Level Multiplexing (SLMux), which exploits fibers with different scattering levels: a standard low scattering SMF to enable the multiplexing, and a MgO‑nanoparticles doped fibers with a 40 dB higher scattering for sensing purposes. The setup with eight multiplexed fibers allows to obtain bite force mapping for each side of the jaw by embedding four fibers for left and right sides. The pressure sensitivity coefficient of the maps has been effectively calculated. The setup has been validated for 2D force mapping over the silicone mouthguard with millimeter resolution. The capability of optical fiber to be multiplexed and embedded in non-uniform geometries results in a high resolved and precise 2D bite force reconstruction.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zhanerke Katrenova, Shakhrizat Alisherov, Madina Yergibay, Zhanat Kappassov, Daniele Tosi, and Carlo Molardi "Distributed optical fiber sensor technology for bite force mapping", Proc. SPIE 12771, Advanced Sensor Systems and Applications XIII, 127710I (27 November 2023); https://doi.org/10.1117/12.2687664

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KEYWORDS

Fiber optics sensors

Nanoparticles

Scattering

Multiplexing

Optical fibers

Backscatter

Single mode fibers

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