Review
Materials Science, Multidisciplinary
Barbara R. Gomes, Rui Araujo, Tatiana Sousa, Rita B. Figueira
Summary: This review discusses the practicality of using optical fiber sensors for assessment and maintenance of concrete and RCS, emphasizing the impact of organic-inorganic hybrid sol-gel membranes on sensor performance and highlighting the advantages of the sol-gel route in sensor material design.
Article
Engineering, Electrical & Electronic
Parviz Zolfaghari, Oguz Kaan Erden, Onur Ferhanoglu, Murat Tumer, Arda D. Yalcinkaya
Summary: The study developed a multi-sensor platform for real-time monitoring of pressure, temperature, and location during surgical procedures, offering new possibilities for interventional surgery with integration into medical devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Song Gao, Zengrun Wen, Haiyang Wang, Chams Baker, Liang Chen, Yangjian Cai, Xiaoyi Bao
Summary: Stimulated Brillouin scattering and the longitudinal strain performance based on BOTDA in a nonuniform As2Se3-PMMA tapered fiber areinvestigated. The strain performance of the BGS frequency shift and the BGS linewidth change under the imposed longitudinal strain are analyzed. A strain-insensitive BGS linewidth is achieved by selecting the fiber gain section along the nonuniform As2Se3-PMMA tapered fiber.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Review
Chemistry, Analytical
Zengrun Wen, Ziqing Guan, Jingru Dong, Hongxin Li, Yangjian Cai, Song Gao
Summary: This paper summarizes the methods of sensitivity enhancement in interferometer-based fiber optic sensors, and derives the five parameters related to sensitivity using the modal coupling interferometer as an example. The research papers modulating these parameters to enhance sensing sensitivity are reviewed in the literature.
Article
Construction & Building Technology
Bertram Richter, Max Herbers, Steffen Marx
Summary: Distributed fiber optic sensing is a promising technology for structural health monitoring, allowing for continuous and high-resolution strain measurements. Different approaches for crack width calculation exist depending on the application of the sensor. Scalable and automated analysis methods are needed to handle the large amount of data and derive useful information from measurements.
STRUCTURAL CONCRETE
(2023)
Article
Polymer Science
Xin Lu, Konstantin Hicke, Mathias Breithaupt, Christoph Strangfeld
Summary: This study presents a preliminary investigation on distributed humidity monitoring during the drying process of concrete using embedded polymer optical fiber (POF). Experimental results indicate that the signal received at 650 nm increases, while the fiber attenuation factor at 500 nm clearly increases, which is consistent with the measurement result of the electrical humidity sensors embedded in the concrete sample.
Review
Construction & Building Technology
Liang Fan, Yi Bao
Summary: Monitoring corrosion in reinforced concrete is crucial for assessing structural health, with various fiber optic sensors showing advantages in different conditions. However, the gap between sensor technology innovation and engineering practices hinders further development and widespread applications. This review covers types of fiber optic sensors, their sensing principles, key features, and discusses technical challenges and future research needs to advance sensor development and promote effective applications.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Optics
Ce Bian, Minxuan Li, Wei Cao, Manli Hu, Zhiqin Chu, Ruohui Wang
Summary: In this study, a robust method for integrating nanodiamonds with nitrogen-vacancy (NV) centers into optical fiber was developed and experimentally demonstrated for all-optical thermometry application. The efficiency of NV fluorescence can be enhanced by adjusting the thickness of UV adhesive film and additional aluminum film deposition, paving the way for developing fiber-based quantum thermometry and magnetometry.
CHINESE OPTICS LETTERS
(2021)
Article
Optics
Kejun Shang, Ming Lei, Haowei Li, Tianqi Zhang, Xiaozhi Yu, Qiang Xiang, Yonglin Na, Lizhe Zhang
Summary: This study presents a novel interferometric fiber optic gyroscope (IFOG) utilizing an integrated optical chip, application-specific integrated circuit, and small-diameter sensing coil. The prototype has an overall size of 30 mm x 30 mm x 30 mm and weighs 68 g, making it the smallest closed-loop IFOG currently known. Static experiments demonstrate that the bias stability of the integrated IFOG closely matches the theoretical accuracy limit determined by the fiber coil, meeting the requirements of near-navigation-grade compact inertial navigation systems.
CHINESE OPTICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Kaiming Yang, Bonan Liu, Changrui Liao, Yongxue Wang, Zhihao Cai, Jian Tang, Yatao Yang, Yiping Wang
Summary: The sensor proposed in this study is based on PBP-FBG and utilizes spectrum loss, Bragg dip shifts, and cut-off mode shift to measure surrounding liquid level, temperature, and refractive index respectively. It provides a simple and reliable method for accurate measurements in hazardous environments.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Amarteja Kocherla, Murali Duddi, Kolluru V. L. Subramaniam
Summary: An application is developed for sensing stress-induced damage localization in concrete using embedded PZT patches. A self-compensating attenuation factor quantifies changes in stress waves introduced by cracking in the material and provides a sensitive indication of displacement discontinuity.
Article
Chemistry, Analytical
Alejandra Amaya, Julian Sierra-Perez
Summary: This paper presents a data-driven methodology for structural health monitoring (SHM) in reinforced concrete structures using embedded fiber optic sensors and pattern recognition techniques. A prototype structure was built and instrumented with fiber Bragg gratings (FBGs) bonded directly to the reinforcing steel bars embedded in the concrete. Datasets for pristine and damaged states were acquired, and classifiers based on Mahalanobis' distance were developed for supervised and unsupervised pattern recognition, achieving an accuracy of up to 98%.
Review
Construction & Building Technology
Ramesh Gomasa, Visalakshi Talakokula, Sri Kalyana Rama Jyosyula, Tushar Bansal
Summary: This paper highlights the importance of monitoring concrete structures and the application of embedded piezo sensor in monitoring different life stages. Through a comprehensive review of piezo sensor configurations, researchers can gain insights into the latest technology and explore unexplored areas.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Engineering, Multidisciplinary
Liang Fan, Xianming Shi
Summary: Reinforcement corrosion is a major threat to the service life of RC structures, and various monitoring techniques have been categorized into five main types based on sensing principles and key characteristics. Future research should focus on aspects such as spatial resolution, sensor selection, and cost-efficiency.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Review
Construction & Building Technology
Fujian Tang, Guoshuai Zhou, Hong-Nan Li, Els Verstrynge
Summary: Optical fiber sensors have been proposed for monitoring steel rebar corrosion in marine environments or from deicing salts, offering advantages such as lightweight, compactness, immunity to electromagnetic interference, and multiplexing capabilities. This review provides a state-of-the-art overview of optical fiber sensors for corrosion monitoring in concrete structures, focusing on sensing principles and performance parameters.
CONSTRUCTION AND BUILDING MATERIALS
(2021)