Article
Chemistry, Physical
Alwar Ramanujam Padmavathi, P. Sriyutha Murthy, Arindam Das, Panchapakesan Veeramani, Toleti Subba Rao
Summary: Polydimethyl siloxane (PDMS) CuO nanocomposites with different CuO nanoparticles as nanofillers were prepared, showing enhanced antifouling activity in PDMS matrix. The addition of 0.05M CTAB capped CuO nanoparticles resulted in monodispersed CuO-NP with improved broad spectrum antifouling activity.
SURFACES AND INTERFACES
(2021)
Article
Optics
Liangtao Hou, Yan Li, Yi Liu, Min Li, Shiliang Qu
Summary: An integrated optical fiber sensor with high sensitivity and low crosstalk was demonstrated for temperature and pressure sensing. The sensor utilizes dual pressure/temperature sensitive materials integrated on a hollow-core fiber, achieving discrimination and simultaneous measurement of the two parameters.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Titi Xia, Ziqi Liu, Yongchang Mei, Zhengyong Liu
Summary: In this article, a novel tactile force sensor based on chirped fiber Bragg gratings (CFBGs) is demonstrated, which uses a conventional neural network to detect force magnitude and 2-D positions. Experimental results show that the sensor has high prediction accuracy and position extraction precision, allowing for real-time visualization and feedback.
IEEE SENSORS JOURNAL
(2023)
Article
Polymer Science
Giovanna Stella, Matteo Barcellona, Lorena Saitta, Claudio Tosto, Gianluca Cicala, Antonino Gulino, Maide Bucolo, Maria Elena Fragala
Summary: Tailored ZnO surface functionalization in microchannels allows for control of two-phase microfluidic flow and modulation of fluid dynamics of different liquids inside PDMS microchannels, providing a new approach for fine tuning fluid dynamics inside microchannels.
Article
Engineering, Electrical & Electronic
Dongtao Hu, Shanke Lv, Yongxing Guo, Huagang He, Jiayi Liu
Summary: The article presents a fiber Bragg grating (FBG) force sensor with enhanced sensitivity using a strain-reinforcing mechanism, achieving high sensitivity and good performance, demonstrating potential for superior structural health monitoring.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Chong Zhang, Xiaoman Chen, Xiaohang Liu, Changyu Shen, Zhenlin Huang, Zhihao Wang, Tingting Lang, Chunliu Zhao, Yueming Zhang, Zugang Liu
Summary: A hydrogen sensor based on tilted fiber Bragg grating coated with PDMS/WO3 composite film was proposed. The sensor showed high sensitivity and fast response and recovery time. Additionally, the sensor has inherent temperature self-compensation capability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Instruments & Instrumentation
J. B. Titus, M. E. Griswold, E. M. Granstedt, R. M. Magee, N. Charkhesht, J. H. Schroeder, M. Meekins, I Allfrey
Summary: TAE Technologies has developed an advanced diagnostic system using an industrial fiber Bragg grating (FBG) sensor array to detect the heat flux along the wall of a vacuum vessel during plasma discharge in their experimental device C-2W.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Optics
Zhihui Luo, Bo Lu, Jianglou Huang, Changyan Ran, Huiling He
Summary: This study proposes a sound source direction-of-arrival (DOA) estimation method for a microphone array based on ultra-weak fiber Bragg grating (UW-FBG) distributed acoustic sensor. The system utilizes a series linear array with three UW-FBG microphones and combines convolutional recurrent neural networks for DOA estimation. Experimental results show that the method has good potential in distributed sound source localization.
Article
Engineering, Electrical & Electronic
Tianliang Li, Han Zheng, Anqi Pan, Jinxiu Guo, Dongjian Wu, Yuegang Tan, Zude Zhou
Summary: The article introduces a ReLU-based BP method for decoupling a fiber Bragg grating force sensor, aiming to improve measurement accuracy. Experimental results validate the feasibility and effectiveness of the method in decoupling the nonlinear response of the designed sensor.
IEEE SENSORS JOURNAL
(2021)
Article
Biochemical Research Methods
Pingping Wang, Shengqi Zhang, Zhengyong Liu, Yuxin Huang, Jie Huang, Xuemei Huang, Jie Chen, Bimei Fang, Dongxian Peng
Summary: Minimally invasive surgery, such as laparoscopic surgery, has rapidly developed due to its small wound and quick recovery. However, a lack of force feedback in these surgeries can lead to tissue damage. This study proposes a tactile sensor with fiber Bragg gratings (FBGs) integrated at the tip of a laparoscopic grasper to provide real-time force feedback. Test results show that the proposed sensor can help control the gripping force of the grasper and reduce tissue trauma.
JOURNAL OF BIOPHOTONICS
(2022)
Article
Instruments & Instrumentation
Xuefeng Mao, Xiao Zhou, Hao Ye, Yuting Tan, Yuan Luo
Summary: A fast and real-time demodulation scheme for dynamic fiber Bragg grating (FBG) based on a swept laser is proposed in this study. The algorithm utilizes a neighborhood average algorithm to achieve high resolution and stability in Bragg wavelength interrogation. Experimental results show that the proposed algorithm achieves a Bragg wavelength resolution of 0.11 pm at a laser scanning frequency of 40 kHz. Compared with Buneman wavelength estimation algorithm and other commonly used FBG peak search algorithms, the proposed algorithm demonstrates low computational cost, high sensitivity, and stability.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Javier Elaskar, Francesca Bontempi, Philippe Velha, Rana M. Armaghan Ayaz, Lorenzo Tozzetti, Stefano Faralli, Fabrizio Di Pasquale, Claudio J. Oton
Summary: We present an interferometer-based multiplexed fiber Bragg grating (FBG) interrogator using silicon photonic technology. The photonic-integrated system includes various components integrated on a 6x8 mm² silicon chip, such as grating couplers, active and passive interferometers, a 12-channel wavelength-division-multiplexing (WDM) filter, and Ge photodiodes. The device showcases the advantage of integrated photonics, allowing the integration of different demodulation schemes in the same chip, enabling easy scalability without increasing dimensions or cost.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Dongpo Xu, Dequan Feng, Qiang Chen, Guoquan Liu, Xueguang Qiao
Summary: This paper presents a novel temperature and pressure sensor that is small in size but has a large measurement range, enabling accurate temperature and pressure measurement in oil and gas wells. The feasibility of the sensor is confirmed through theoretical calculations and simulations, and the relationship between the sensor structure and the wavelength of the fiber Bragg grating is established. The sensor structure is optimized through simulations to enhance its performance. Experimental results validate the sensor's ability to independently measure temperature and pressure, with a pressure range of 0-40 MPa, a sensitivity of 24.05 pm/MPa, a linearity of 0.9997, and a repeatability of 0.0038. The temperature measurement range is 25-200°C, with a sensitivity of 31.16 pm/°C. The sensor is packaged with solid glass particles, allowing for prolonged operation in high-temperature environments.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Xu Yue, Ruyi Lu, Qiaochu Yang, Enlai Song, Haocheng Jiang, Yang Ran, Bai-Ou Guan
Summary: In this study, a flexible wearable optical sensor (FWOS) was developed with a microfiber Bragg grating (mu FBG) as the core sensing node and a ductile PDMS film as the sensor encapsulation. The strain amplification effect of the microfiber significantly enhanced the sensitivity of FWOS to pressure, bending angle, and temperature, making it suitable for real-time monitoring of wrist pulses, finger knuckle bending, and human body temperature. The proposed FWOS provides new ideas for the development of future wearable optical devices, which are critical for the advancement of next-generation robotics and healthcare monitoring.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Review
Chemistry, Analytical
Hang Qu, Weiyuan Huang, Zhoupeng Lin, Xin Cheng, Rui Min, Chuanxin Teng, Christophe Caucheteur, Xuehao Hu
Summary: This article reviews recent research progress on the annealing effects on polymer optical fibers (POFs) that are used for fiber Bragg gratings (FBGs) in POFs. The review covers the principle of annealing, different annealing timings, methods and conditions, as well as the impact of annealing on POFs and POFBGs. It provides a comprehensive overview of annealing techniques and their importance in this field.
Article
Engineering, Electrical & Electronic
Fuxiang Liu, Qi Jiang
Summary: This article introduces a new method for feature extraction of footstep events and human recognition, achieving high accuracy, recall, and F-1 value through the extraction of dominant frequencies and the development of seven features. The features demonstrate robustness and high performance under various conditions, making them a preferable choice for human recognition tasks.
IEEE SENSORS JOURNAL
(2021)
Article
Instruments & Instrumentation
Wei Qin, Qi Jiang, Guozhao Wei
Summary: The study focuses on developing a two-range pressure sensor based on fiber Bragg grating technology, which can detect slight pressure with higher sensitivity. By converting pressure signals using two elastomers, the sensor enables robots to adapt to complex environments, demonstrating promising practical applications.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Engineering, Electrical & Electronic
Hongzhu Zhang, Qi Jiang
Summary: A highly sensitive optical fiber air pressure sensor based on Fabry-Perot interferometer is proposed and demonstrated. The sensor shows potential applications in measuring airway pressure and environmental monitoring, as verified through finite element simulation and experimental verification.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Guozhao Wei, Qi Jiang
Summary: A novel approach for fiber optics shape sensing is presented, using a kinematic model based on rotation vector to predict trajectory and reconstruct complex spatial curves for mini-invasive bio-medical devices. The use of compact Fabry-Perot interferometer (FPI) provides high strain sensitivity, low temperature sensitivity, and ultra-low cost for curvature sensing, showing higher sensitivity and lower cross sensitivity compared to fiber Bragg grating.
IEEE SENSORS JOURNAL
(2021)
Article
Computer Science, Information Systems
Rui Li, Qi Jiang
Summary: Cervical spondylosis is a common disease in today's society. This study developed a novel photogrammetric method to assess the three-dimensional cervical range of motion (CROM). The method demonstrated excellent reliability and high agreement with the traditional goniometer-based method. Additionally, a cervical motion curve concept was proposed to represent the movement track of the neck and reflect cervical health status.
IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS
(2022)
Article
Engineering, Biomedical
Danish Masood, Jiang Qi
Summary: This research introduces a new approach for 3D acupoint localization using a fusion of RGB and depth convolutional neural networks (CNN). The aim is to provide real-time guidance for robot-controlled moxibustion therapy. The effectiveness of the approach is proven through the construction of a 3D acupoint dataset and further experiments.
ANNALS OF BIOMEDICAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Guozhao Wei, Qi Jiang
Summary: In this study, a cascaded FPI sensing structure was proposed to address the issues of sensing error and pseudo-force caused by temperature changes. By simultaneously measuring cutting force and temperature, this structure effectively eliminates the interference from temperature and enhances the sensing resolution.
Article
Engineering, Multidisciplinary
Jialiang Yan, Qi Jiang, Yingxuan Zhang, Feiwen Wang
Summary: Force/torque detection plays a crucial role in achieving precise robot control. This study proposes a novel self-uncoupling six-axis force/torque sensor based on fiber grating. By employing a layered measurement design method and special orthogonal decoupling combined beam structures, low coupling and high sensitivity are achieved. Furthermore, decoupling and temperature compensation are realized through FBG wavelength shift difference, reducing the complexity of sensitive elements and improving anti-electromagnetic interference capability. Simulation and experiments demonstrate the sensor's excellent static and dynamic characteristics, including good linearity, low hysteresis, high sensitivity, and high resolution.
