Article
Engineering, Electrical & Electronic
Ruohui Wang, Yizhuo Li, Xueguang Qiao
Summary: Fiber Bragg grating (FBG) accelerometers measure vibrations through wavelength shifts caused by dynamic strain. Their high temperature resistance and multiplexing capabilities make them suitable for quasi-distributed applications in harsh environments. Improving the coupling efficiency in the sensor's mechanical structure can enhance the sensitivity of the FBG accelerometer. Additionally, the FBG accelerometer can be developed as a multidimensional sensor, which distinguishes it from distributed-fiber vibration-sensing technology. This paper reviews recent advances in FBG accelerometer developments, focusing on sensitivity enhancement and orientation identification. New techniques such as hybrid strain loading, thin-cladding fiber FBGs, multicore FBGs, and cladding FBGs are introduced.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
S. Sridhar, Suneetha Sebastian, Ajay K. Sood, Sundarrajan Asokan
Summary: The paper reports a comprehensive study on MoS2 nanolayer coated etched Fiber Bragg Grating (eFBG) strain sensor, demonstrating high sensitivity, linearity, and potential for various applications. The coating technique enables direct control over the thickness of MoS2, leading to consistent and repeatable sensing performance.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Li Xiong, Yongxing Guo, Wanhuan Zhou, Min Chen, Xinglin Zhou
Summary: This paper proposed a three-axis vibration sensor based on fiber Bragg grating (FBG) with only five sensing elements, using a composite structure of cross-beam-type elastomer with multiplexed FBGs for sensing. The sensor showed low cross coupling and self temperature compensation capability. Through finite element analysis, the strain distribution and dynamic characteristics of the composite structure were studied, and vibration sensitivity tests validated its capability to measure three-axis vibration.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Zichuang Li, Lei Liang, Hui Wang, Shu Dai, Ke Jiang, Zhiyuan Song
Summary: A novel medium-frequency accelerometer, based on fiber Bragg grating and flexible hinges, has been proposed in this paper. The differential structure doubles the sensitivity of the sensor while avoiding temperature effects. The proposed sensor shows good temperature self-compensation function and lateral anti-interference capability.
Article
Engineering, Multidisciplinary
Hao Wu, Qijing Lin, Feng Han, Libo Zhao, Zhuangde Jiang
Summary: This paper presents an acceleration sensor with high natural frequency and sensitivity using fiber Bragg grating technology. The sensor system consists of two fiber gratings, one serving as an accelerometer and the other as a reference grating. The sensor has a high sensitivity and frequency, making it suitable for rail transit bearing systems.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yanning Xu, Wei Fan, Hong Gao, Xueguang Qiao
Summary: A low-frequency accelerometer based on Fiber Bragg Grating (FBG) and spring structure is proposed to meet the needs of seismic wave monitoring in low-frequency oil exploration. The experimental results show that the accelerometer has high sensitivity, sufficient operating range, and is expected to be suitable for low-frequency oil exploration.
OPTICAL FIBER TECHNOLOGY
(2024)
Review
Engineering, Electrical & Electronic
Carlo Massaroni, Martina Zaltieri, Daniela Lo Presti, Andrea Nicolo, Daniele Tosi, Emiliano Schena
Summary: Systems for cardiorespiratory monitoring show great potential in various fields including clinical settings, harsh environments, sports science, and telemonitoring. Challenges lie in developing unobtrusive and comfortable systems with high metrological performance. Recent advances in fiber optic technology, particularly in fiber Bragg grating (FBGs) sensors, offer promising solutions for cardiorespiratory monitoring.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Massimiliano Gabardi, Lorenzo Tozzetti, Stefano Faralli, Massimiliano Solazzi, David Benedetti, Samina Rajbhandari, Gianni Buttaro, Fabrizio Di Pasquale
Summary: Fiber Bragg grating (FBG) sensors written by femtosecond laser pulses in polyamide-coated low bending loss optical fibers are successfully embedded in carbon composite structures. These sensors are interrogated by a tunable laser and their response to temperature and strain variations is characterized. The results show good agreement with simulations, demonstrating the effectiveness of the embedding process for real-time accurate strain measurement.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Yizhuo Li, Qiqi Ma, Fengyi Chen, Ruohui Wang, Xueguang Qiao
Summary: In this study, a vibration monitoring system consisting of a flexible hinge and a dual FBG was proposed, which achieves sensitivity enhancement and self-temperature compensation. The experimental results show that the proposed system has smaller resolution and detectable acceleration compared to similar systems with a single FBG.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Stenio Aristilde, Marco Cesar Prado Soares, Thiago D. Cabral, Gildo Rodrigues, Eric Fujiwara, Fabiano Fruett, Cristiano M. B. Cordeiro
Summary: This article presents an optical fiber sensor based on TFBG for assessing the speed of two-phase flows, which can be interrogated in real-time according to an intensity-based, single-wavelength setup. The system is validated for samples comprised of water, oil, and air, yielding maximum relative error of 4.4% for speed measurements, whereas the sensor response can be tailored for different fluids by choosing the wavelength of the input light.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Xiangpeng Xiao, Jinpeng Tao, Qingguo Song, Yuezhen Sun, Jiang Yang, Zhijun Yan
Summary: In this study, a fiber Bragg grating-based oscillator-accelerometer was demonstrated, showing the ability to tune the acceleration sensitivity by controlling the position of the mass oscillator. Theoretical and experimental investigations were conducted to analyze the performance of the proposed accelerometer, revealing a linear relationship between sensitivity and the introduced parameter P. The experimental results confirmed the theoretical findings, showing linear sensitivity increase with parameter P and quadratic relationship with resonance frequency.
Article
Engineering, Electrical & Electronic
Yongxing Guo, Peng Hu, Li Xiong, Ke Liu, Wanhuan Zhou
Summary: This study proposes a novel FBG tilt sensor with a vibration damping feature to overcome the problem of external vibration interference in traditional tilt sensors. By using a vibration-isolating spring as the connection and filling damping fluid inside the sensor housing, the proposed sensor offers better vibration stability and monitoring accuracy. The experimental results demonstrate its high sensitivity, creep resistance, and temperature compensation capability.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Haoyan Zang, Shuiquan Pang, Benliang Zhu, Hongchuan Zhang, Hai Li, Sergej Fatikow, Xianmin Zhang
Summary: This article presents a cantilever-type fiber Bragg grating (FBG)-based microforce sensor with micro-Newton resolution, which is essential for the detection of micro-forces in the micro-/nanomanipulation process. The sensor has a resolution of 7 μN force in the range of 10 mN, and it is successfully applied in the mechanical property test of the zebrafish embryo.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Flavio Esposito, Stefania Campopiano, Agostino Iadicicco
Summary: This work presents the design, fabrication, and characterization of a miniaturized metallic package for optical fiber Bragg grating (FBG) sensors. The package enhances the temperature sensitivity of the grating and eliminates cross-sensitivities to mechanical effects. It has a simple design and is made using off-the-shelf components. The packaged FBG shows improved temperature response and reduced sensitivity to longitudinal forces compared to an unpackaged FBG.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Junying Zhang, Fengyi Chen, Ruohui Wang, Xueguang Qiao, Haibin Chen, Xiongxing Zhang
Summary: The proposed magnetic field sensor, combining fiber Bragg gratings and magnetic fluids, can simultaneously measure magnetic field and temperature, with an intensity sensitivity of -0.143 dB/Oe in the linear range of 60-110 Oe. The sensor features two resonant modes in the reflection spectrum, the first of which responds excellently to magnetic field intensity and direction, while the second mode remains stable but varies with ambient temperature.
OPTICS AND LASER TECHNOLOGY
(2021)
Review
Optics
Rui Min, Xuehao Hu, Luis Pereira, M. Simone Soares, Luis C. B. Silva, Guoqing Wang, Luis Martins, Hang Qu, Paulo Antunes, Carlos Marques, Xiaoli Li
Summary: Polymer optical fibers, with advantages like low Young's modulus, high flexibility, and bio-compatibility, meet the requirements for monitoring human physiological and body functions and are expected to be widely implemented in this research field in the next few years.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Environmental Sciences
Catia Tavares, Daniela Real, Maria de Fatima Domingues, Nelia Alberto, Hugo Silva, Paulo Antunes
Summary: This study proposes an optical sensing network for monitoring pressure and temperature in wheelchairs to prevent pressure ulcers and track the position of the user. Experimental results show that the sensor cells have high sensitivity to pressure and temperature changes. The proposed sensing network is validated for accuracy and reliability through tests on specific relief positions and random position changes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Engineering, Electrical & Electronic
Matilde Rocha, Catia Tavares, Catarina Nepomuceno, Paulo Fernando da Costa Antunes, Maria de Fatima Domingues, Nelia Jordao Alberto
Summary: Numerous studies have been conducted to improve the quality of life for wheelchair users, and a system based on fiber Bragg gratings has shown promising results in assessing muscle effort during daily activities.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Israel Sousa, Luis Pereira, Esequiel Mesquita, Vitoria L. Souza, Walney S. Araujo, Antonio Cabral, Nelia Alberto, Humberto Varum, Paulo Antunes
Summary: This study proposes a sensing system based on optical fiber Bragg gratings for monitoring the thickness loss caused by corrosion in metallic structures. Experimental results demonstrate the reliable and suitable functionality of the proposed system for corrosion monitoring.
Article
Engineering, Electrical & Electronic
D. Lo Presti, C. Leitao, A. Noccaro, C. Tavares, C. Massaroni, M. A. Caponero, P. Antunes, D. Formica, E. Schena
Summary: This study combines fiber Bragg gratings (FBGs) with 3D printing technology to develop customized sensors and evaluate their performance in strain, temperature, humidity, and hysteresis response. The results confirm the significant influence of printing profiles on sensor performance, providing a foundation for developing highly customized 3D-printed sensors.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Guilherme Heim Weber, Eduardo Nunes dos Santos, Danilo Fernandes Gomes, Ana Luiza Beltrao Santana, Jean Carlos Cardozo da Silva, Cicero Martelli, Daniel Rodrigues Pipa, Sergio Taveira de Camargo Jr, Rigoberto E. M. Morales, Manoel Feliciano da Silva Jr, Marco Jose da Silva
Summary: This article introduces the use of distributed acoustic sensing (DAS) for the measurement of slug flow. Experimental measurements were carried out in a horizontal pipeline using fiber optics wrapped along the outer surface to estimate the velocity of the gas phase. The results showed a root-mean-square deviation of 8.34% and 12.18% compared to a commercial conductance-based sensor.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Joao M. Leca, Yannis Magalhaes, Paulo Antunes, Vanda Pereira, Marta S. Ferreira
Summary: This work presents a 3D-printed optofluidic fiber sensor that can measure refractive index in real time. By combining a microfluidic system with an optical fiber extrinsic Fabry-Perot interferometer, a microfluidic chip platform was developed using 3D printing. The sensor showed good stability and sensitivity when characterized using different concentrations of glucose solutions.
Article
Chemistry, Analytical
Luis Pereira, Rui Min, Getinet Woyessa, Ole Bang, Carlos Marques, Humberto Varum, Paulo Antunes
Summary: This paper proposes a simple and cost-effective fiber Bragg grating (FBG) interrogation solution using ultra-short FBGs as edge filters. The solution is not only cost-effective but also has similar thermal sensitivities as standard uniform FBGs in silica fiber, making it suitable for dynamic measurements without complex equipment or calculations. Moreover, the solution has the capability of multiplexing multiple USFBGs in the same optical fiber, showing great potential for creating new sensing configurations.
Article
Engineering, Electrical & Electronic
Beatriz Brusamarello, Jean Carlos Cardozo da Silva, Kleiton de Morais Sousa, Giovanni Alfredo Guarneri
Summary: The three-phase induction motor (TIM) is widely used due to its robustness and cost-effectiveness. However, like any other equipment, it is vulnerable to faults, with about 52% of them related to bearings. This work proposes a method using fiber Bragg grating (FBG) sensors to detect flaws in the outer bearing's raceway by measuring motor dynamic strain signals. A support vector machine (SVM) classifier is used for fault severity identification, with feature extraction performed using peak selection and principal component analysis (PCA). The results show that the PCA-based dataset achieved a higher hit rate than the dataset based on peak selection.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Luis Pereira, Carlos Marques, Rui Min, Getinet Woyessa, Ole Bang, Humberto Varum, Paulo Fernando da Costa Antunes
Summary: This study presents the first inscription of fiber Bragg gratings (FBGs) in ZEONEX-480R microstructured polymer optical fiber (POF) using the fourth harmonic (266 nm) of a Nd:YAG laser system. The gratings were produced in 270-mu m diameter POF samples connectorized with ferrule connectors (FCs) using the phase mask method. The results demonstrate good stability and performance of the gratings in this polymer fiber, indicating potential cost-effective solutions.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Daniel Benetti, Eduardo Henrique Dureck, Uilian Jose Dreyer, Daniel Rodrigues Pipa, Jean Carlos Cardozo da Silva
Summary: This study proposes a new method using fiber Bragg grating (FBG) to measure dynamic strain signals and develop a signal processing algorithm for classification of switch devices. The results demonstrate that the system can accurately identify critical faults.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Marcos Dinis Lavarda, Danilo Fernandes Gomes, Talita Paes, Renata Oliveira de Sousa, Uilian Jose Dreyer, Jean Carlos Cardozo da Silva, Cicero Martelli
Summary: This letter presents the design and development of a smart foot using fiber Bragg gratings (FBGs) sensors embedded in carbon fiber-reinforced polymer (CFRP). FBG sensors are used to monitor different equivalent parts of the human anatomy in the foot, providing proprioception for robotic foot control. An adaptive fuzzy-proportional-integral-derivative (FPID) control strategy is employed to improve the proprioception of the system.
IEEE SENSORS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Danilo Fernandes Gomes, Guilherme Heim Weber, Daniel Rodrigues Pipa, Marco Jose da Silva, Jean Carlos Cardozo da Silva, Sergio Taveira de Camargo, Manoel Feliciano da Silva, Cicero Martelli
Summary: This letter presents the development and evaluation of a diaphragm-based quasi-distributed optical fiber acoustic transducer. The proposed sensor overcomes the limitations of traditional microphones by utilizing distributed acoustic sensing (DAS) technology, offering precise source localization and long-range monitoring capabilities, even in challenging environments. Experimental evaluations demonstrate the sensor's performance, showcasing its quasi-distributed nature and linear response to applied power across a wide frequency range.
IEEE SENSORS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Danilo Fernandes Gomes, Guilherme Heim Weber, Eduardo Henrique Dureck, Daniel Rodrigues Pipa, Marco Jose da Silva, Jean Carlos Cardozo da Silva, Sergio Taveira de Camargo Junior, Manoel Feliciano da Silva, Cicero Martelli
Summary: This letter discusses the limitations of the phase unwrapping algorithm in distributed temperature gradient sensing (DTGS) systems and proposes an evaluation of the impact of repetition rate and gauge length on the temperature reconstruction. Through experimental tests and theoretical analyses, the study investigates limiting parameters for data acquisition and factors that can compromise measurement accuracy. The findings contribute to improving the use of DTGS systems, allowing more accurate and reliable temperature monitoring in distributed systems.
IEEE SENSORS LETTERS
(2023)
Article
Computer Science, Information Systems
Catia Tavares, Joao Oliveira E. Silva, Andre Mendes, Leonor Rebolo, Maria De Fatima Domingues, Nelia Alberto, Mario Lima, Ayman Radwan, Hugo Placido Da Silva, Paulo Fernando Da Costa Antunes
Summary: There is a growing trend of people spending more time sitting, leading to an increasing number of postural problems. To improve working conditions for workers who spend long hours seated, smart instrumented chairs with warnings of changes in position should be developed. This study proposes a standard office chair instrumentation approach, capable of monitoring physiological parameters such as posture, body temperature, and respiratory frequency, as well as environmental parameters such as temperature, humidity, carbon dioxide levels, noise, and light. The instrumented chair showed 100% accuracy in postural detection and up to 18% error in physiological parameters sensing, making it a potential solution for preventing posture-related pathologies and enhancing work productivity.
