Article
Engineering, Multidisciplinary
Abdul Ghaffar, Qi Li, Shah Ali Haider, An Sun, Arnaldo G. Leal-Junior, Lifeng Xu, Muhammad Chhattal, Mujahid Mehdi
Summary: A novel fiber-optic sensor structure for displacement measurement is proposed, where the drilling length affects the sensor's range and sensitivity. The sensor achieves nanometer resolution of about 8.647 nm and a maximum range of 4 mm, making it suitable for displacement, vibration, angle, and pressure sensing applications.
Article
Engineering, Electrical & Electronic
Abdul Ghaffar, Qi Li, Irfan Mehdi, Khadija Abro, Navera Karim, Chikezie Chimere Onyekwena, Mujahid Mehdi, BoWen Chen
Summary: This study introduces a novel sensor structure for displacement measurement, utilizing intensity variation between fibers. The structure, using plastic optical fiber and tapered fiber, achieves high resolution and sensitivity.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Shahad Sabhan Al-Lami, Ansam M. Salman, Abdulhadi Al-Janabi
Summary: The biocompatibility and unique physical properties of optical fibers make them promising for biomechanical motion sensing. This paper presents the fabrication of a wearable macro-bending structure fiber sensor and demonstrates its potential for observing key motions during physical therapy for patients with joint stiffness. The sensor shows high sensitivity and good reproducibility, making it suitable for monitoring different body motions.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Jing Zhao, Mi Li, Song Peng, Yangting Guo, Qifu Tang
Summary: This paper introduces an inductive linear displacement sensor with complementary resonant coupling units, which has been improved to enhance measurement accuracy and environmental adaptability.
IEEE SENSORS JOURNAL
(2021)
Review
Energy & Fuels
Zhifei Wu, Wendong Liu, Mengfan He, Dong Jiang
Summary: With the rise of miniature energy harvesting, energy harvesting from the surrounding environment has provided a new solution for powering sensors. This research combines energy harvesting with the energy required by sensors and proposes a new research idea. An accurate theoretical model is constructed based on the laws of electromagnetic induction and Lenz's law, and validated using simulation software. The theoretical model allows for direct replacement of displacement parameters with induced voltage, greatly reducing the cost of displacement sensors and providing a new design idea for sensor construction.
Article
Chemistry, Multidisciplinary
Minjung Kim, Sehui Bae, Inrok Oh, Jejoong Yoo, Jun Soo Kim
Summary: This study investigates the sequence-dependent coupling between DNA bending and its helical twist, identifying specific dinucleotide steps with strong twist-bend coupling during DNA minicircle formation. This work provides new insights into the structural responses of DNA to mechanical deformation, particularly in sharply bent DNA minicircles, for nanoscale applications.
Article
Chemistry, Analytical
Antonio Velarte, Aranzazu Otin, Pablo Gimenez-Gomez, Xavier Munoz-Berbel, Esther Pueyo
Summary: This study developed a sensor to measure tissue stretch in excised tissues, aiming to better understand cardiovascular diseases. The sensor, based on a simple topology and technology, achieved high precision in measuring.
Article
Multidisciplinary Sciences
Kalipada Chatterjee, Venugopal Arumuru, Dhananjay Patil, Rajan Jha
Summary: A concatenated modal interferometers-based multipoint monitoring system is proposed and demonstrated for detecting the amplitude, frequency, and phase of mechanical vibrations. The system utilizes identical photonic crystal fiber (PCF) sections integrated in a single fiber channel, acting as a compact and efficient sensing system. By analyzing the resultant signals using computational techniques, the vibration parameters applied to each interferometer can be realized.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Chen Zhu, Huitong Deng, Zhenming Ding, Jie Huang, Ziyang Zhang
Summary: In this letter, a new strategy for optical fiber sensing, particularly for EFPI sensing, is proposed and demonstrated, allowing for three-dimensional measurements based on a hybrid and compact EFPI device. Experimental results show that 3-D positioning with sub-micron resolution can be achieved by simultaneously measuring the reflection and transmission of the device.
Article
Chemistry, Analytical
Che-Chih Tsao, Yi-Chun Tseng, Yu-Sheng Chen, Wei-Hsuan Chang, Li-Ting Huo
Summary: This paper presents the design and development of a compact micro-displacement sensor capable of sub-micron precision at a fraction of the cost compared to existing commercial devices. The sensor utilizes a mechanical magnifying mechanism to amplify the displacement and a low-cost Hall sensor for measurement. Various design concepts for the magnifying mechanism were studied, and a final design featuring lever structures in a multi-planar layout was devised. Prototypes with magnification ratios over 100 were successfully tested, demonstrating high repeatability and accuracy at sub-micrometer level.
Article
Engineering, Electrical & Electronic
Burak Ozbey
Summary: Wireless monitoring of displacement between two points with a large interrogation range is demonstrated in this study, showing significant advantages over previous configurations based on near-field coupling. This technology is crucial for applications such as structural health monitoring.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Yanjun Hu, Yulong Hou, Junsheng Zhang
Summary: This paper studies the temperature compensation of plastic optical fiber (POF) using gold absorbability. A gold film is modified on the surface of POF through magnetron sputtering. The temperature output characteristics of different structures are tested, and the effects of gold film thickness, polishing area, and sputtering sequence are investigated. The experimental results show that the proposed temperature compensation method is competitive and straightforward.
Article
Engineering, Electrical & Electronic
Zhiyuan Liu, Fang Wang, Xu Wang, Xinyi Zhao, Lixia Li, Yufang Liu
Summary: We propose a novel, temperature-insensitive, low-cost multipoint displacement sensing system consisting of a fiber displacement sensor, fiber loop mirror (FLM), and optical time-domain reflectometer (OTDR). The system utilizes a cascaded single-mode-no-core-single-mode (SNS) fiber design for the displacement sensor, with the SNS attached to the FLM constructed by a 3-dB coupler. The variation in displacement causes the FLM reflected energy to change, enabling displacement measurement. Each FLM serves as a displacement sensing unit, achieving a similar sensing effect with a measurement dynamic range of 15.613 dB. The system is an ideal solution for engineering problems in displacement measurement and can be widely applied in structural health monitoring.
IEEE SENSORS JOURNAL
(2023)
Article
Optics
Abdul Ghaffar, Muhammad Chhattal, Qi Li, Mujahid Mehdi, Sikandar Ali, Salamat Ali, Nafees Ali, BoWen Chen
Summary: The research proposes a new angle sensor setup based on the twisted macro-bend coupling method, allowing for independent and simultaneous measurement of clockwise and anti-clockwise rotation angles.
Article
Engineering, Mechanical
Javad Taghipour, Jiaying Zhang, Alexander D. Shaw, Mike Friswell, Huayuan Gu, Chen Wang
Summary: This study investigates the use of resonant passive energy balancing in morphing helicopter blades, highlighting the importance of lag-twist coupling coefficient and direction of aerodynamic moment in controlling the pitch angle. The research also focuses on analyzing the sensitivity of the system dynamics to parameter changes, and emphasizes the significant roles of bend-twist coupling and aerodynamic force direction in determining pitch dynamics.
NONLINEAR DYNAMICS
(2022)
Article
Optics
Yanjun Zhang, Lizhi Wang, Pinggang Jia, Chengrui Zhai, Guowen An, Lei Liu, Fengtong Zhu, Jianhui Su
Summary: In this study, a cascaded dual-core photonic crystal fiber (DC-PCF) refractive index sensor is proposed and its high sensitivity and resolution are demonstrated. By cascading and filling different refractive indices in the central air hole, the sensor achieves the vernier effect and shows a 37-fold sensitivity improvement compared to traditional DC-PCF.
Article
Engineering, Electrical & Electronic
Jiashun Li, Pinggang Jia, Guocheng Fang, Jun Wang, Jiang Qian, Qianyu Ren, Jijun Xiong
Summary: In this study, an all-silica fiber-optic Fabry-Perot pressure sensor with excellent high-temperature survivability and low thermal drift was developed. Experimental results demonstrated that the sensor could operate stably from room temperature up to 800 degrees C, making it suitable for gas pressure detection in high-temperature environments.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Zeyu Zhang, Xiaoyong Chen, Guocheng Fang, Jiajie Wu, Aolong Gao
Summary: A solvent-free method for the synthesis of red/near-infrared fluorescent carbon dots (R-CDs) was proposed, which reduced the number of raw materials used. The synthesized R-CDs demonstrated excellent fluorescence properties and sensing capability for glucose, as well as outstanding performance in cell imaging.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Qianyi Zhang, Dandan Zhou, Guocheng Fang, Hongxu Lu, Jianfeng Zeng, Zi Gu
Summary: A cancer cell derived membrane coated 2D layered double hydroxides nanoparticle (CM-PEG/MnLDH) has been developed for enhanced magnetic resonance imaging (MRI) of tumors. The biomimetic CM-PEG/MnLDH exhibited excellent cell-specific targeting ability and deep tissue penetration. The in vivo imaging results show that the CM-PEG/MnLDH provides clear MRI of tumor tissues, especially in the central region of tumors, demonstrating its potential as a promising MRI contrast agent for precise cancer diagnosis.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Optics
Jiashun Li, Pinggang Jia, Jiang Qian, Jun Wang, Guowen An, Jijun Xiong
Summary: This paper presents the design and fabrication of an all-silica microsphere-lens on the fiber end face to improve the coupling efficiency of free-space light. The microsphere-lens diameter can be adjusted by controlling the light-passing time of the CO2 laser fusion splicer. Experimental results demonstrate the feasibility and performance of the microsphere-lens in fiber-optic sensors.
Article
Chemistry, Analytical
Jiang Qian, Pinggang Jia, Qianyu Ren, Hua Liu, Li Qin, Jijun Xiong
Summary: This paper designs and experimentally demonstrates a high-temperature fiber-optic Fabry-Perot accelerometer (FOFPA), which has the potential of being applicable in higher temperatures compared to conventional accelerometers.
Article
Chemistry, Analytical
Suwei Wang, Jun Wang, Wenhao Li, Yangyang Liu, Jiashun Li, Pinggang Jia
Summary: In this paper, a high-fineness fiber-optic Fabry-Perot high-temperature pressure sensor based on MEMS technology is proposed and experimentally verified. The sensor has high pressure sensitivity and temperature tolerance, making it suitable for high-temperature pressure testing.
Article
Chemistry, Multidisciplinary
Andrew M. K. Law, Jiamin Chen, Yolanda Colino-Sanguino, Laura Rodriguez de la Fuente, Guocheng Fang, Susan M. Grimes, Hongxu Lu, Robert J. Huang, Sarah T. Boyle, Jeron Venhuizen, Lesley Castillo, Javad Tavakoli, Joanna N. Skhinas, Ewan K. A. Millar, Julia Beretov, Fernando J. Rossello, Joanne L. Tipper, Christopher J. Ormandy, Michael S. Samuel, Thomas R. Cox, Luciano Martelotto, Dayong Jin, Fatima Valdes-Mora, Hanlee P. Ji, David Gallego-Ortega
Summary: ALTEN is a biomimetic tissue platform that enables ex vivo analysis of tissue biopsies while preserving the original cellular milieu. Its use of single-cell genomics allows for rapid and accurate analysis of cellular responses to perturbations.
Review
Chemistry, Multidisciplinary
Xin Guo, Yajun You, Aida Bao, Pinggang Jia, Jijun Xiong, Junshuai Li
Summary: The interest in field electron emission cathode nanomaterials is increasing due to their wide range of applications. Nanodiamond (ND) film is considered an ideal cathode emitter in field emission devices because of its unique properties. This review summarizes recent research on ND film electron field emitters, highlighting new findings and discussing future developments. Methods for large-scale, high-quality, and cost-effective synthesis of ND films are discussed, as well as strategies to improve field emission performance. Challenges and prospects in this area are also discussed.
Article
Engineering, Electrical & Electronic
Zhengqiang Yan, Shanshan Zhu, Yanjun Zhang, Pinggang Jia, Jia Liu, Lei Liu, Fengtong Zhu, Huiqing Niu, Guowen An
Summary: A sensor for pressure and temperature detection based on dual Fabry-Perot interferometers and fiber Bragg grating in a hollow silica microsphere-cavity structure is proposed. The sensor achieves simultaneous detection of temperature and pressure by utilizing the Vernier effect and the length change of the microsphere F-P cavity caused by external pressure. With temperature sensitivity of 14.3 pm/degrees C and pressure sensitivity of 49.5 nm/MPa, the sensor demonstrates pressure detection at 300 degrees C ranging from 0 to 0.8 MPa. It has the advantages of temperature compensation, high production efficiency, low cost, robustness, and self-encapsulation, making it promising for high-temperature and high-pressure detection.
IEEE SENSORS JOURNAL
(2023)
Review
Optics
Qianyu Ren, Pinggang Jia, Guowen An, Jia Liu, Wenyi Liu, Jijun Xiong
Summary: This study proposes a self-compensation three-wavelength demodulation method for interrogating fiber-optic extrinsic Fabry-Perot interferometric (EFPI) sensors. It uses three signals with different wavelengths to extract the variation in EFPI cavity lengths. The demodulation method improves the accuracy by stabilizing the phase difference using the demodulated EFPI cavity length.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Analytical
Hua Liu, Pinggang Jia, Chengxin Su, Aihao Zhao, Jia Liu, Qianyu Ren, Jijun Xiong
Summary: This paper proposes a fiber-optic Fabry-Perot (F-P) vibration sensor that operates at 800 ?. The sensor is composed of an inertial mass on the upper surface parallel to the end face of the optical fiber. With a sensitivity of 0.883 nm/g and a resonant frequency of 20.911 kHz, the sensor was prepared using ultraviolet-laser ablation and three-layer direct-bonding technology. Experimental results demonstrate a sensitivity of 0.876 nm/g in the range of 2 g to 20 g at an operating frequency of 200 Hz at 20 ?. The sensor's nonlinearity was evaluated from 20 ? to 800 ? with a nonlinear error of 0.87%. Furthermore, the z-axis sensitivity of the sensor is 25 times higher than the x-axis and y-axis. The vibration sensor shows promising prospects for high-temperature engineering applications.
Article
Optics
Yanan Niu, Pinggang Jia, Jianhui Su, Jingyi Wang, Guowen An, Qianyu Ren, Jijun Xiong
Summary: We propose a tunable random fiber laser based on the combination of random grating and highly reflective fiber Bragg grating to reduce the pumping threshold and achieve a short-cavity single-mode transmission with a narrow-linewidth. The random grating is regarded as a linear combination of uniform fiber gratings with different periods. We constructed a random fiber laser with a linewidth of 1.68 kHz and a threshold of 29.2 mW using the random grating and highly reflective FBG combined with an erbium-doped fiber. By changing the central wavelength of the high-reflection FBG, the tunable wavelength of the output laser was realized, and the tunable range was 0.847 nm (1549.110-1549.957 nm). The proposed laser has the advantages of a lower threshold, shorter cavity length, narrower linewidth, and a relatively simple structure compared with other lasers.
Article
Optics
G. U. O. W. E. N. AN, L. E. I. LIU, P. U. HU, P. I. N. G. G. A. N. G. JIA, F. E. N. G. T. O. N. G. ZHU, Y. A. N. J. U. N. ZHANG, J. I. A. LIU, J. I. J. U. N. XIONG
Summary: The tilted fiber Bragg grating (TFBG), chirped fiber Bragg grating (CFBG), Vernier effect, and metal surface plasmon resonance (SPR) effect are combined to form a probe type fiber sensor for simultaneous measurement of seawater salinity, temperature, and depth (STD). The TFBG excites SPR effect by covering a gold layer around it to measure the refractive index (RI) of seawater. The TFBG's core mode is used for detecting seawater temperature change, and the measurement of TFBG reflection spectrum is achieved by inscribing a CFBG after it, making the sensor have a probe type design and more practical applications. The fusion of quartz micro-spheres on the sensing fiber's end face and the parallel connection of a Fabry Perot (F-P) interference cavity enable the use of the Vernier effect to detect ocean depth.
Article
Computer Science, Information Systems
Jiang Qian, Pinggang Jia, Hua Liu, Qianyu Ren, Jia Liu, Li Qin, Jijun Xiong
Summary: This paper introduces an extrinsic high-temperature fiber-optic Fabry-Perot vibration sensor based on MEMS technology and demonstrates its performance through experiments. The sensor shows high stability and sensitivity, works reliably in high-temperature environments, and has a wide range of engineering applications.
