Measurement uncertainty of multicore optical fiber sensors used to sense curvature and bending direction. (January 2019)

• Record Type: Journal Article
• Authors: Floris, Ignazio; Sales, Salvador; Calderón, Pedro A.; Adam, Jose M.
• Is Part Of: Measurement. Volume 132(2019)
• Page Start: 35
• Page End: 46
• Publication Date: 2019-01
• Subjects: Fiber Bragg Grating -- Multicore fiber optic -- Curvature Sensing -- Shape sensing -- Monte Carlo simulation -- Error analysis; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2018.09.033
• Languages: English
• ISSNs: 0263-2241

Abstract

Graphical abstract: Highlights: FBGs sensors are well established as highly sensitive strain-measuring devices. MCF shape sensing technology has become a powerful and reliable instrument. High accuracy in determining curvature and bending direction is crucial. Measurement uncertainty of MCF sensors is analysed. Abstract: This paper describes a study of the influence of strain measurement uncertainty on sensing curvature and bending direction, considering one of the most widely used fiber geometries for sensing applications (7-core Multicore Fiber) with different core spacings (distance between outer cores and fiber axis). The Monte Carlo method was proposed to simulate the real measurement process and 33 simulations with 10 6 iterations were performed to determine the laws of propagation of strain measurement uncertainty in calculating curvature and bending direction. The outcomes, which show the strong influence of strain uncertainty and core spacing on the precision of Multicore Fiber sensors, can be used to support the design of new sensors or new fiber geometry and to predict their achievable performance.