Optimizing Algorithm for Existing Fiber-Optic Displacement Sensor Performance

Zeina Elrawashdeh; Christine Prelle; Frédéric Lamarque; Philippe Revel; Stéphane Galland

doi:10.3390/s24020448

Optimizing Algorithm for Existing Fiber-Optic Displacement Sensor Performance

Sensors (Basel). 2024 Jan 11;24(2):448. doi: 10.3390/s24020448.

Authors

Zeina Elrawashdeh^{1

2}, Christine Prelle³, Frédéric Lamarque³, Philippe Revel³, Stéphane Galland⁴

Affiliations

¹ Institut Catholique d'Arts et Métiers (ICAM), Site of Grand Paris Sud, 77127 Lieusaint, France.
² ICB UMR 6303, CNRS, Université Bourgogne Franche-Comté, UTBM, 90010 Belfort, France.
³ Royallieu Research Center, Roberval Laboratory (Mechanics, Energy and Electricity), University of Technology of Compiègne, Rue Roger Couttolenc, 60200 Compiègne, France.
⁴ Université de Technologie de Belfort Montbéliard UTBM, Laboratoire Connaissance et Intelligence Artificielle CIAD UR 7533, 90010 Belfort, France.

Abstract

This paper describes the optimal design of a miniature fiber-optic linear displacement sensor. It is characterized by its ability to measure displacements along a millimetric range with sub-micrometric resolution. The sensor consists of a triangular reflective grating and two fiber-optic probes. The measurement principle of the sensor is presented. The design of the sensor's triangular grating has been geometrically optimized by considering the step angle of the grating to enhance the sensor's resolution. The optimization method revealed a global optimum at which the highest resolution is obtained.

Keywords: displacement; fiber-optic sensor; global optimum; measurement range; resolution; sensitivity.

Grants and funding

This research was funded by the University of Technology of Compiègne, The ID of the funder is 100012945. The APC was funded by the University of Technology of Belfort and Montbélliard.