Strain Transfer From the Host Structure to Optical Fiber Sensor

2011 ◽  
Vol 201-203 ◽  
pp. 2419-2422
Author(s):  
Shiuh Chuan Her ◽  
Chang Yu Tsai
Keyword(s):  
Optical Fiber ◽  
Protective Coating ◽  
Electromagnetic Interference ◽  
Optical Fiber Sensor ◽  
Adhesive Layer ◽  
Small Dimension ◽  
Host Material ◽  
Fiber Sensor ◽  
Strain Transfer ◽  
Host Structure

Optical fiber sensors with light weight, small dimension and immunity to electromagnetic interference are considered as a superior structural health monitoring device. It is well known that the strain transfer from the host structure to the optical fiber sensor is dependent on the bonding characteristics such as adhesive layer, protective coating and host material. In this investigation, a theoretical model with three concentric cylinders represented optical fiber, protective coating, and host material, respectively, is proposed to determine the strain in the optical fiber sensor induced by the host structure. The theoretical predictions are validated with the numerical analysis using the finite element method. The effect of host material on the strain transferred is presented through a parametric study.

Strain Analysis of an Embedded Optical Fiber Sensor

2011 ◽  
Vol 467-469 ◽  
pp. 279-282
Author(s):  
Shiuh Chuan Her ◽  
Chang Yu Tsai
Keyword(s):  
Optical Fiber ◽  
Electromagnetic Interference ◽  
Optical Fiber Sensor ◽  
Strain Analysis ◽  
Adhesive Layer ◽  
Small Dimension ◽  
Host Material ◽  
Fiber Sensor ◽  
Fiber Sensors ◽  
Theoretical Predictions

Optical fiber sensors with light weight, small dimension and immunity to electromagnetic interference are widely used in structural health monitoring device. In this investigation, a theoretical model of the strain transferred from the host material to the embedded optical fiber is developed to reveal the differential strains between the optical fiber sensor and host material. The theoretical predictions are validated with the numerical analysis using the finite element method. The percentage of strain in the host material actually transferred to the optical fiber is dependent on the bonding characteristics such as adhesive layer, protective coating and host material. Parametric study shows that the larger of the host material the more strain is transferred to the optical fiber.

Strain Analysis of Surface Bonded Optical Fiber Sensors

2011 ◽  
Vol 121-126 ◽  
pp. 4166-4170
Author(s):  
Shiuh Chuan Her ◽  
Chang Yu Tsai
Keyword(s):  
Optical Fiber ◽  
Electromagnetic Interference ◽  
Optical Fiber Sensor ◽  
Strain Analysis ◽  
Adhesive Layer ◽  
Optical Fiber Sensors ◽  
Fiber Sensor ◽  
Fiber Sensors ◽  
Theoretical Predictions ◽  
Host Structure

Optical fiber sensors with light weight, small size and immunity to electromagnetic interference have been found to be a promising device for use in the development of smart structures. It is well known that the strain transfer from the host structure to the optical fiber sensor is dependent on the bonding characteristics such as adhesive layer and bonded length. In this investigation, the optical fiber sensor is surface bonded on the host structure. A theoretical model consisting of the optical fiber, adhesive layer and host material, is proposed to determine the strain in the optical fiber sensor induced by the host structure. The theoretical predictions were validated with the numerical analysis using the finite element method.

Stress Analysis of Composite Material Embedded with Optical Fiber Sensor

2006 ◽  
Vol 326-328 ◽  
pp. 59-62
Author(s):  
Shiuh Chuan Her ◽  
Bo Ren Yao
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Electromagnetic Interference ◽  
Optical Fiber Sensor ◽  
Local Stress ◽  
Smart Structure ◽  
Fiber Optic Sensor ◽  
Host Material ◽  
Concentric Cylinders ◽  
Host Structure

Fiber optic sensor with small size, light weight and immunity to electromagnetic interference can be embedded and integrated into the host material to form a smart structure system. One must recognize that optical fibers are foreign entities to the host structure, therefore will alter the stress state in the vicinity of the embedded sensor irrespective of the small size of the fiber. This is a result of the material and geometric discontinuity introduced by the embedded optical fiber. In this study, the local stress fields in the vicinity of the embedded fiber are examined. The host material is considered to be a composite with reinforced fiber parallel to the optical fiber. The geometry in the vicinity of the embedded fiber is modeled by four concentric cylinders which represent the optical fiber, protective coating, resin and host material, respectively. In this investigation, the host structure is subjected to longitudinal normal stress and transverse hydro-static stress. The effects of the coating and host material on the stress distribution in the vicinity of the embedded optical fiber are presented through a parametric study.

Stress Analysis of Composite Material Embedded with Optical Fiber Sensor Subjected to In-Plane Shear

2010 ◽  
Vol 139-141 ◽  
pp. 137-140
Author(s):  
Shiuh Chuan Her ◽  
Bo Ren Yao
Keyword(s):  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
High Stress ◽  
Shear Loading ◽  
Smart Structure ◽  
Host Material ◽  
Fiber Sensor ◽  
Plane Shear ◽  
Host Structure ◽  
Coating Matrix

Optical fiber sensor with small size, light weight and immunity to electromagnetic interference can be embedded and integrated into the host material to form an ideally smart structure system. One must recognize that optical fibers are foreign entities to the host structure, therefore will induce high stress state in the vicinity of the embedded sensor irrespective of the small size of the fiber. To address this concern, present paper focuses the attention on constituent interaction between the optical fiber, coating, matrix and host material. An analytical model to predict the stress fields in the vicinity of the embedded optical fiber is presented. The theoretical development is based on the four concentric cylinders model which represents the optical fiber, protective coating, matrix and host material, respectively. The host material is considered to be a composite with reinforced fiber parallel to the optical fiber. In this investigation, the host structure is subjected to in-plane shear loading. The effects of the coating and host material on the stress distribution in the vicinity of the embedded optical fiber are presented through a parametric study.

scholarly journals An Optical Fiber Sensor Based on La2O2S:Eu Scintillator for Detecting Ultraviolet Radiation in Real-Time

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3754 ◽  
Author(s):  
Yongji Yan ◽  
Xu Zhang ◽  
Haopeng Li ◽  
Yu Ma ◽  
Tianci Xie ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Response Time ◽  
Electromagnetic Interference ◽  
Uv Light ◽  
Optical Fiber Sensor ◽  
Temperature Response ◽  
Superior Performance ◽  
Fiber Sensor ◽  
Uv Detectors

A novel ultraviolet (UV) optical fiber sensor (UVOFS) based on the scintillating material La2O2S:Eu has been designed, tested, and its performance compared with other scintillating materials and other conventional UV detectors. The UVOFS is based on PMMA (polymethyl methacrylate) optical fiber which includes a scintillating material. Scintillating materials provide a unique opportunity to measure UV light intensity even in the presence of strong electromagnetic interference. Five scintillating materials were compared in order to select the most appropriate one for the UVOFS. The characteristics of the sensor are reported, including a highly linear response to radiation intensity, reproducibility, temperature response, and response time (to pulsed light) based on emission from a UV source (UV fluorescence tube) centered on a wavelength of 308 nm. A direct comparison with the commercially available semiconductor-based UV sensor proves the UVOFS of this investigation shows superior performance in terms of accuracy, long-term reliability, response time and linearity.

Strain Transfer Law of Distributed Optical Fiber Sensor

2019 ◽  
Vol 46 (4) ◽  
pp. 0410001 ◽  
Author(s):  
章征林 Zhang Zhenglin ◽  
高磊 Gao Lei ◽  
孙阳阳 Sun Yangyang ◽  
张清华 Zhang Qinghua ◽  
曾鹏 Zeng Peng
Keyword(s):  
Optical Fiber ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Strain Transfer ◽  
Distributed Optical Fiber Sensor ◽  
Distributed Optical Fiber

scholarly journals Optical Fiber Sensor for Heavy Chemical Detection: An Overview

2021 ◽  
Vol 2075 (1) ◽  
pp. 012010
Author(s):  
Nurul Athirah Mohamad Abdul Ghafar ◽  
Arni Munira Markom ◽  
Marni Azira Markom ◽  
Ahmad Razif Muhammad
Keyword(s):  
Optical Fiber ◽  
Electromagnetic Interference ◽  
Low Cost ◽  
Optical Fiber Sensor ◽  
High Sensitivity ◽  
Electrochemical Analysis ◽  
Detection Methods ◽  
Fiber Sensor ◽  
Sensor Technology ◽  
Compact Size

Abstract Heavy metal contaminations such as mercury, lead, arsenic, cadmium, and zinc are becoming more serious and have become a hazard to human health. Due to their non-biodegradable nature, they can easily accumulate in the environment and cause toxicity even at low concentrations. Therefore, detecting the presence of these metal ions requires a highly sensitive sensing method. Traditional detection methods, such as electrochemical analysis, require complicated sample preparation, are costly, and typically require a lengthy measurement period. These days, optical fiber sensors have been acknowledged due to their unique characteristics such as compact size, high sensitivity, low cost, high flexibility, and immunity to electromagnetic interference. An overview of an optical fiber sensor technology for heavy chemical measurement is discussed in this paper. The sensing mechanisms are summarized, as well as the chemical water quality parameters and sensitivities.

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