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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Evaluation o image matching techniques for optical fiber specklegram sensor analysis

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Autor(es):
Fujiwara, Eric [1] ; Ri, Yoshi [2] ; Wu, Yu Tzu [1] ; Fujimoto, Hiroshi [2] ; Suzuki, Carlos Kenichi [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Sch Mech Engn, Lab Photon Mat & Devices, 200 R Mendeleyev, BR-13083860 Campinas, SP - Brazil
[2] Univ Tokyo, Grad Sch Engn, Dept Elect Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656 - Japan
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: APPLIED OPTICS; v. 57, n. 33, p. 9845-9854, NOV 20 2018.
Citações Web of Science: 2
Resumo

A quantitative study of image matching techniques applied to fiber specklegram sensor analysis is presented. The fiber status is modulated by a microbending transducer, so the output speckle field can be correlated to the input displacements. Once acquired and preprocessed, the specklegrams' variations were evaluated according to seven approaches. Although the average intensity did not provide reliable information per se, the correlation and sum of differences methods yielded similar to 11 mm(-1) and similar to 14 mm(-1) sensitivities, respectively, within a similar to 0.06 mm range and low linearity and hysteresis errors, with enhancement possibility by intensity level cancellation. Moreover, the phase-only correlation and the mutual information metrics provided very high sensitivities (22 mm(-1) and 120 mm(-1), respectively) for a <0.02 mm range, making these techniques suitable for detecting subtle variations in the fiber status due to physical or chemical stimuli. (C) 2018 Optical Society of America (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