Optical Fiber Relative Humidity Sensor Based on a FBG with a Di-Ureasil Coating

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Sandra F H Correia (Autor) Outra; Paulo Antunes (Autor) Outra; Edison Pecoraro (Autor) Outra; Patricia P Lima (Autor) Outra; Humberto Varum (Autor) FEUP; Luis D Carlos (Autor) Outra; Rute A S Ferreira (Autor) Outra; Paulo S Andre (Autor) Outra

Revista

Título: Sensors

Vol. 12 Nº 1

Páginas: 8847-8860

ISSN: 1424-3210

Editora: MDPI

Indexação

ISI Web of Knowledge - 54 Citações

Scopus - 89 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia civil

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia civil > Engenharia estrutural

Outras Informações

ID Authenticus: P-002-8AJ

DOI: 10.3390/s120708847

Abstract (EN): In this work we proposed a relative humidity (RH) sensor based on a Bragg grating written in an optical fiber, associated with a coating of organo-silica hybrid material prepared by the sol-gel method. The organo-silica-based coating has a strong adhesion to the optical fiber and its expansion is reversibly affected by the change in the RH values (15.0-95.0%) of the surrounding environment, allowing an increased sensitivity (22.2 pm/%RH) and durability due to the presence of a siliceous-based inorganic component. The developed sensor was tested in a real structure health monitoring essay, in which the RH inside two concrete blocks with different porosity values was measured over 1 year. The results demonstrated the potential of the proposed optical sensor in the monitoring of civil engineering structures.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14