公开(公告)号：US11215447B2

公开(公告)日：2022-01-04

申请号：US16342684

申请日：2017-10-23

Applicant: VRIJE UNIVERSITEIT BRUSSEL

Inventor： Urszula Nawrot ,  Thomas Geernaert ,  Francis Berghmans ,  Hugo Thienpont

IPC: G01B11/16 ,  G01N3/06 ,  G01B5/30 ,  G01B7/16 ,  G01B21/32 ,  G01L1/06 ,  G01L1/24

Abstract: A transducer for assisting in measuring displacement or strain in an object of interest is described. A plate has at least two end sections for mounting the transducer. It comprises a flexible connection between the two end sections. The flexible connection comprises a plurality of rigid portions and flexible interconnections between the rigid portions for allowing relative movement of the rigid portions with respect to each other. The flexible connection has a central section substantially having a U-shape comprising two rigid portions spaced from each other over a distance and adapted for positioning a strain sensing element at the spacing in between said two rigid portions. The rigid portions and flexible interconnections are arranged so that a displacement applied to the end sections results in a relative displacement at the spacing in the central section that is larger than the relative displacement applied to the end sections.

公开(公告)号：US10261245B2

公开(公告)日：2019-04-16

申请号：US15111885

申请日：2015-01-16

Applicant: VRIJE UNIVERSITEIT BRUSSEL

Inventor： Sanne Sulejmani ,  Thomas Geernaert ,  Francis Berghmans ,  Hugo Thienpont

IPC: G02B6/02 ,  G01D5/353 ,  G01L1/24 ,  G02B6/12

Abstract: A microstructured optical fiber comprises a doped core region embedded in a cladding layer, and a plurality of longitudinal tubes, wherein a radial cross-section of the optical fiber comprises a central hexagonal portion comprising a plurality of holes arranged according to a hexagonal grid surrounding a core section. Each hole corresponds to a respective tube, within a hexagonal boundary of the grid, and the plurality of holes comprises holes of first and second types arranged in a biaxial mirror-symmetric configuration. The holes of the first type are arranged in two side holey structures comprising distinct sub-grids of the hexagonal grid, defined by respective outer boundaries corresponding to portions of the hexagonal boundary of the grid and respective inner boundaries. Outer tangential lines to the respective inner boundaries cross each other at the opposed side of the core with respect to the side of the respective side holey structure.