scholarly journals Liquid Resin Infusion Process Validation through Fiber Optic Sensor Technology

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 508
Author(s):  
Vincenzo Romano Marrazzo ◽  
Armando Laudati ◽  
Michele Vitale ◽  
Francesco Fienga ◽  
Gianni Iagulli ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Technology ◽  
Resin Infusion ◽  
Relative Temperature ◽  
Process Validation ◽  
Liquid Resin ◽  
Fiber Optic Probes ◽  
Depth Study ◽  
Liquid Resin Infusion

In the proposed work, a fiber-optic-based sensor network was employed for the monitoring of the liquid resin infusion process. The item under test was a panel composed by a skin and four stringers, sensorized in such a way that both the temperature and the resin arrival could be monitored. The network was arranged with 18 Fiber Bragg Gratings (FBGs) working as temperature sensors and 22 fiber optic probes with a modified front-end in order to detect the resin presence. After an in-depth study to find a better solution to install the sensors without affecting the measurements, the system was investigated using a commercial Micron Optics at 0.5 Hz, with a passive split-box connected in order to be able to sense all the sensors simultaneously. The obtained results in terms of resin arrival detection at different locations and the relative temperature trend allowed us to validate an infusion process numerical model, giving us better understanding of what the actual resin flow was and the time needed to dry preform filling during the infusion process.

An improving demodulation of interferometric fiber optic sensor technology

2013 ◽  
Author(s):  
Li Gao ◽  
Yong Li ◽  
Zhaorui Chu ◽  
Ming Wu ◽  
Nan Lin
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Technology ◽  
Optic Sensor

scholarly journals Fiber optic sensors for environmental monitoring

2019 ◽  
pp. 527-530
Author(s):  
Leonid B. Likumovich ◽  
Andrei V. Medvedev ◽  
Oleg I. Kotov ◽  
Sergei I. Markov ◽  
Vladimir M Nikolaev
Keyword(s):  
Signal Processing ◽  
Optical Fibers ◽  
Acoustic Waves ◽  
Phase Modulation ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Technology ◽  
Maximum Efficiency ◽  
Physical Parameters ◽  
Signal Processing Technique

Sensors discussed are designed to register acoustic waves and micro deformations in ground. Sensor technology is based on phase modulation that occurs in optical fiber when it is influenced by outside mechanical disturbance. In our paper we consider two possible ways of registration this phase modulation: fiber optic interferometer and mode to mode interference. These methods can be incorporated with various signal processing technique to obtain maximum efficiency of fiber optic sensor under the certain conditions. It is well known that optical fibers are widely used to transmit high band signals for long distances. In this case fiber sensitivity to environmental disturbances is a bad thing. But from other side the disturbances change propagating light properties (intensity, phase, polarization, etc.). This changes can be registered in the output light and after appropriate signal processing will give information about the parameters of the outside influence on the fiber. This is an idea in brief how optical fibers can be used as physical parameters sensors.

scholarly journals Multifunctional Extrinsic Fiber Optic Sensor to Measure Various Parameters of Liquids at the Operating Wavelength of 660nm Employing a U-Shaped Glass Rod as a Sensing Element

2019 ◽  
Vol 8 (2S3) ◽  
pp. 1418-1431
Keyword(s):  
Optical Fibers ◽  
Fiber Optic ◽  
Adiabatic Compressibility ◽  
Molar Refraction ◽  
Fiber Optic Sensor ◽  
Sensor Technology ◽  
Sensing Element ◽  
Optic Sensor ◽  
Operating Wavelength ◽  
Shaped Glass

Fiber Optic sensor technology has become more popular since early 1970’s during which the mechanism of losses from optical fibers was exploited to construct a new class of fiber optic sensors and systems. A novel fiber optic sensor has been developed by connecting a U-shaped glass element of specific dimensions between a light source of 660nm wavelength and an optical power detector by using a couple of PCS optical fibers of 200/230μm diameters of core and cladding respectively. The sensor can be employed to measure several parameters such as Refractive Index, Density, Viscosity, Ultrasonic Velocity, Molar Volume, Molar Refraction, Dielectric Constant, Acoustic Impendence, Adiabatic Compressibility, Viscous Relaxation Time, Intermolecular Free Length, Absorption Coefficient, Gibb’s Free Energy, Free Volume, Internal Pressure and their excess parameters of Toluene and tert-Butanol mixtures at 30℃ temperature and at the operating wavelength of 660nm

scholarly journals ESTUDO NUMÉRICO DE UM PROCESSO DE INFUSÃO DE RESINA PARA DIFERENTES CONFIGURAÇÕES DE UM CANAL VAZIO EM FORMA DE Y

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Carolline Aryene Schnich ◽  
Glauciléia Maria Cardoso Magalhães ◽  
Sandro Campos Amico ◽  
Luiz Alberto Oliveira Rocha ◽  
Liércio André Isoldi ◽  
...  
Keyword(s):  
Volume Of Fluid ◽  
Resin Infusion ◽  
Liquid Resin ◽  
Liquid Resin Infusion

O presente trabalho avalia numericamente o processo de Infusão de Resina Líquida (LRI- Liquid Resin Infusion) em distintas configurações de canais vazios com geometria “Y” inseridos numa placa retangular com meio poroso. O LRI consiste na injeção de uma resina polimérica em um molde fechado constituído por um meio poroso e canais vazios, que facilitam a propagação da resina por toda extensão do domínio. Destaca-se que esse processo apresenta grande aplicação na indústria automotiva, marítima e aeroespacial.  O escoamento de resina é considerado incompressível, laminar e transiente tanto no meio poroso quanto no não-poroso. O objetivo é comparar o tempo de preenchimento da resina em diferentes configurações de canais vazios em formato de “Y” e identificar a geometria que minimiza o tempo de injeção. As restrições geométricas do problema são a área da placa com o meio poroso, a espessura e comprimento total do canal vazio. O problema possui dois graus de liberdade, a razão entre os comprimentos do ramo simples e dos ramos bifurcados do canal aberto (H0/H1) e o ângulo entre os ramos bifurcados e a direção horizontal (α= 10º), que é mantido constante. As equações de conservação de massa e quantidade de movimento para a mistura resina-ar e, uma equação para o transporte de fração volumétrica de resina são resolvidas com o Método dos Volumes Finitos (FVM). A interação entre as fases é tratada com o método Volume of Fluid (VOF) e representa-se o efeito do meio poroso sobre o escoamento da resina pela força de campo dada pela lei de Darcy. Os resultados obtidos demonstraram que a variação de configuração tem alta influência no tempo de preenchimento da resina. Para o caso estudado, observou-se que a maior razão H0/H1 conduziu ao melhor desempenho do sistema, ou seja, minimizou o tempo de injeção da resina.

Application of fiber optic sensor technology in intelligent steel strands

1998 ◽  
Author(s):  
Jiaqi Chen ◽  
Heng Dai ◽  
Desheng Jiang ◽  
Dongya Sun
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor Technology ◽  
Optic Sensor
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