Polymer optical fiber specklegram strain sensor with extended dynamic range

Autor(es)

Fujiwara, Eric ^[1] ; da Silva, Luiz Evaristo ^[2] ; Marques, Thiago H. R. ^[2] ; Cordeiro, Cristiano M. B. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Mech Engn, Lab Photon Mat & Devices, Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Gleb Wataghin Inst Phys, Specialty Opt Fibers & Photon Mat Lab, Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Optical Engineering; v. 57, n. 11 NOV 2018.
• Citações Web of Science: 4

Resumo

A polymer optical fiber strain sensor with extended dynamic range is reported. The proposed algorithm resets the reference fiber status depending on the magnitude of the specklegram deviation so the correlation coefficient never saturates, yielding a continuous response over the full range for both positive and negative strains. The technique was evaluated on the measurement of axial strains using a ZEONEX core, poly(methyl methacrylate) cladding multimode fiber, presenting reproducible results with 3 x 10(-3) mu epsilon(-1) sensitivity (similar to 15 mu epsilon resolution) within a 22,600 mu epsilon interval. In contrast to the available approaches, the presented method can retrieve the strain direction and does not require intensive image processing, thus providing a simple and reliable technique for mechanical measurements using multimode optical fibers. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE) (AU)

• Processo FAPESP: 17/25666-2 - Desenvolvimento de sensor de fibra óptica para medição de sinais de miografia de força aplicado a interfaces humano-robô
• Beneficiário: Eric Fujiwara
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/50632-6 - Sensores baseados em ressonância de plasmon e fibras ópticas microestruturadas
• Beneficiário: Cristiano Monteiro de Barros Cordeiro
• Linha de fomento: Auxílio à Pesquisa - Regular