Thin bonding wires temperature measurement using optical fiber sensors

Antunes, Paulo; Rocha, Adriana; Lima, Hugo; Varum, Humberto; Andre, P.

doi:10.1016/j.measurement.2010.11.016

Cited by 11 publications

(6 citation statements)

References 19 publications

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“…The cure exothermic reaction released heat, Q , is a function of the sample temperature, T, along the time, t, as described by the following equation [12] :…”

Section: Resultsmentioning

confidence: 99%

Conjugation of Optical and Microwave Techniques to Monitor the Early Age Concrete Cure

Pereira

Abe

Antunes

et al. 2013

Instrumentation Science & Technology

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& Concrete corresponds to a multiphase structure in which water content takes a particular importance in its curing process. The water contributes to the cohesion of the mineral network and ensures the ions' conduction when present in the pores of the structure. Therefore, it is essential to monitor the water content in the cement paste during the cure process in order to control the material properties and assess its lifetime. In this article, we report the study of the cement paste during the early age curing period, using the conjugation of optical and microwave methods.

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“…The cure exothermic reaction released heat, Q , is a function of the sample temperature, T, along the time, t, as described by the following equation [12] :…”

Section: Resultsmentioning

confidence: 99%

Conjugation of Optical and Microwave Techniques to Monitor the Early Age Concrete Cure

Pereira

Abe

Antunes

et al. 2013

Instrumentation Science & Technology

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“…It is important to highlight that the optical fiber sensors were introduced in SHM due to their advantages when compared with other measurement devices, such as: no interference from external electromagnetic fields, electric isolation (passive operation with no electrical power needed at the measuring point), possibility to use a high number of sensors in the same fiber (multiplexing), and reduction of the implementation and maintenance costs, and, due to these advantages, a large number of the structural monitoring applications, using optical fibers have already been described, as reported by Kostecki et al [7], Laing et al [8], Antunes et al [9], and in the references therein.…”

Section: Introductionmentioning

confidence: 99%

Groundwater level monitoring using a plastic optical fiber

Mesquita

Paixão

Antunes

et al. 2016

Sensors and Actuators A: Physical

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The present work describes the testing and application of a low cost plastic optical fiber sensor on the monitoring of groundwater levels. Two sensors with different grove depth (½ and ¼ of the core thickness) and a resolution of 20 cm along 2 m of the optical fiber were produced and tested. The sensors were tested under two experimental setups: water level variation (increasing and decreasing of the water level) and groundwater increase simulation, in a soil column. The analysis of the optical signal's amplitude and its variations due to the increasing or decreasing of water level showed that both tested sensors presented an appropriate performance and adequate sensibility to groundwater level variation and, therefore, can be used for in situ applications of monitoring.

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“…Thus, they are attractive for various sensing applications, including temperature [1], strain [2], displacement [3,4], and refractive index [5,6]. Among many promising photonic devices, fiber -based Mach-Zehnder interferometer (MZI) stands out because of its simplicity, compactness, relative simple fabrication and high resolution.…”

Section: Introductionmentioning

confidence: 99%

Temperature effects of Mach-Zehnder interferometer using a liquid crystal-filled fiber

Tseng

et al. 2015

Opt. Express

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Abstract:We demonstrated a simple and cost-effective method to fabricate all fiber Mach-Zehnder interferometer (MZI) based on cascading a short section of liquid crystal (LC)-filled hollow-optic fiber (HOF) between two single mode fibers by using automatically splicing technique. The transmission spectra of the proposed MZI with different LC-infiltrated length were measured and the temperature-induced wavelength shifts of the interference fringes were recorded. Both blue shift and red shift were observed, depending the temperature range. Based on our experimental results, interference fringe was observed with a maximum interferometric contrast over 35dB. The temperature-induced resonant wavelength blueshifts 70.4 nm for the MZI with an LC length of 9.79 mm and the wavelength temperature sensitivity of −1.55 nm/°C is easily achieved as the temperature increases from 25°C to 77°C. 3253-3256 (2013). 20. K. R. Khan, S. Bidnyk, and T. J. Hall, "Tunable all optical switch implemented in a liquid crystal filled dual-core photonic crystal fiber," Prog. Electromag. Res. M 22, 179-189 (2012). 21. T. Alkeskjold, J. Laegsgaard, A. Bjarklev, D. Hermann, A. Anawati, J. Broeng, J. Li, and S. T. Wu, "All-optical modulation in dye-doped nematic liquid crystal photonic bandgap fibers," Opt.

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Thin bonding wires temperature measurement using optical fiber sensors

Cited by 11 publications

References 19 publications

Conjugation of Optical and Microwave Techniques to Monitor the Early Age Concrete Cure

Conjugation of Optical and Microwave Techniques to Monitor the Early Age Concrete Cure

Groundwater level monitoring using a plastic optical fiber

Temperature effects of Mach-Zehnder interferometer using a liquid crystal-filled fiber

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