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Multichannel FBG sensing system using a dense wavelength division demultiplexing module

Enbang Li, Jiangtao Xi, Yanguang Yu, Joe F. Chicharo, Jianquan Yao, Yun-Jiang Rao, Osuk Y. Kwon, Gang-Ding Peng
2005 Advanced Sensor Systems and Applications II  
However, most of the edgefilter based FBG sensing systems are designed for single-channel measurement.  ...  In order to demodulate multi-channel signal from FBG sensors, we propose to use a dense wavelength division multiplexing (DWDM) module.  ...  The system is most suitable for measuring dynamic processes, such as vibrations and dynamic strains.  ... 
doi:10.1117/12.575204 fatcat:je343pez7zbupes6y7le3dq7xm

Multichannel Approach for Arrayed Waveguide Grating-Based FBG Interrogation Systems

Vincenzo Romano Marrazzo, Francesco Fienga, Michele Riccio, Andrea Irace, Giovanni Breglio
2021 Sensors  
the voltage produced by two (or more) adjacent AWG output channels.  ...  The idea is mainly based on the use of an arrayed waveguide grating (AWG) device which is used to discriminate the fiber optic sensor (FOS) wavelength encoded response under test in function of its output  ...  From a spectral point of view, it happens because of the FBG reflectance, which is positioned on the channel peak, is so narrow to not integrate the transmittance of the adjacent channel.  ... 
doi:10.3390/s21186214 pmid:34577419 fatcat:ptrwikihznh3hnbj47f4ygnegm

Underwater Acoustic Communication by a Single-Vector Sensor: Performance Comparison Using Three Different Algorithms

Long-xiang Guo, Xiao Han, Jing-wei Yin, Xue-song Yu
2018 Shock and Vibration  
T-DFE adopts time reversal to combine all the channels of the vector sensor and then is followed by a single-channel DFE to remove residual intersymbol interference (ISI).  ...  P-DFE uses only the pressure channel of the vector sensor to realize the decision feedback equalizer (DFE).  ...  Acknowledgments is research was supported by the National Natural Science Foundation of China (Grant no. 61631008, 61471137, and 50509059) and the Fundamental Research Funds for the Central Universities  ... 
doi:10.1155/2018/2510378 fatcat:bmuz5plxkvddvpswdj7yyeuy5u

Research progress in the key device and technology for fiber optic sensor network

Deming Liu, Qizhen Sun, Ping Lu, Li Xia, Chaotan Sima
2016 Photonic Sensors  
The recent research progress in the key device and technology of the fiber optic sensor network (FOSN) is introduced in this paper.  ...  Moreover, several typical applications of the FOSN are also discussed, such as the fiber optic gas sensing network, fiber optic acoustic sensing network, and strain/dynamic strain sensing network.  ...  Fig. 18 Optical spectrum of the multichannel chaos, including three wavelength channels and a testing channel [76] .  ... 
doi:10.1007/s13320-015-0299-z fatcat:gjkwks6nvfddpk4mp5q7wl5dfu

Development of a multichannel integrated interferometer immunosensor

Aurel Ymeti, Johannes S. Kanger, Robert Wijn, Paul V. Lambeck, Jan Greve
2002 Sensors and actuators. B, Chemical  
A multimode interference coupler [7] [8] consists of a number of single mode input and output channel waveguides and a central channel waveguide structure, which is single mode in vertical direction  ...  Vibrations of the set-up: Vibrations of the set-up may cause a drift in the output signals.  ... 
doi:10.1016/s0925-4005(01)01020-6 fatcat:qz4ail5tqzcklmbpdhf2vtw5ia

MULTI-CHANNEL FIBRE BRAGG GRATING SENSORS FOR UNIAXIAL COMPRESSION TEST ON LIMESTONE ELASTICITY BEHAVIOUR

Balarabe Wada Isah
2019 International Journal of GEOMATE  
a novel multi-channel Fiber Bragg Grating sensors (MC-FBGs) for determining small strain response of cylindrical rock specimen under uniaxial compression test for assessing deformability properties.  ...  To overcome the difficulties of mounting, handling many cables, dependency of the stain responds measured to the properties of the sensor components, this paper intends to explore the applicability of  ...  WORKING PRINCIPLE OF MULTICHANNEL FBG SENSOR Basically, there are two types of optical fibers: multi-mode optical fiber (MMOF) and single mode optical fiber (SMOF).  ... 
doi:10.21660/2019.54.8315 fatcat:6s2tbv3i3renboaviizmlondmy

Volleyball Action Extraction and Dynamic Recognition Based on Gait Tactile Sensor

Limin Qi, Mu Zhou
2021 Journal of Sensors  
First, locate the human body in each frame of the video, and then, perform the process of estimating the position of the graphic model based on the color and texture of the unit.  ...  of the human body.  ...  These two models are the software part of the embedded sports energy monitoring principle system based on the flexible array pressure sensor insole.  ... 
doi:10.1155/2021/9204123 fatcat:ninxybuvejbqdbyu6azwhaberm

Mechanical Energy Sensing and Harvesting in Micromachined Polymer-Based Piezoelectric Transducers for Fully Implanted Hearing Systems: A Review

Rhonira Latif, Mimiwaty Mohd Noor, Jumril Yunas, Azrul Azlan Hamzah
2021 Polymers  
A dual function of sensing the sound signal and simultaneously harvesting vibration energy to power up its system can be attained from a single transducer.  ...  The paper presents a comprehensive review of mechanical energy harvesters and microphone sensors for totally implanted hearing systems.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/polym13142276 fatcat:zaayfonaz5g7dlsl6kyxd7n3je

ADEON Hardware Specification [article]

Bruce Martin, Craig Hillis, Jennifer Miksis-Olds, Michael Ainslie, Joseph Warren, Kevin Heaney
2019 Figshare  
The ADEON program selected a range of hardware components to generate a time-series of acousticdata and supporting data that address the project objectives.  ...  The ADEON Calibration, Deployment and Good Practice Guide contains details of how the equipment was configured for ADEON data collection.  ...  oriented slightly off vertical to minimize interference from sensors higher up on the mooring line.  ... 
doi:10.6084/m9.figshare.6809711.v2 fatcat:72ydgdbvtrgiflxp676u6rptli

Exploiting the leaky-wave properties of transmission-line metamaterials for single-microphone direction finding

Hussein Esfahlani, Sami Karkar, Hervé Lissek, Juan R. Mosig
2016 Journal of the Acoustical Society of America  
Then, numerical simulations and experimental assessments of the proposed transmission-line based structure, implementing only one sensor at one termination, are presented.  ...  This introduces the concept of sound source localization without resorting to beam-steering techniques based on multiple sensors.  ...  ICP microphone is flush-mounted at one termination of the structure, and used as the single sensor of the LWA.  ... 
doi:10.1121/1.4949544 pmid:27369150 fatcat:tsiddzgiljb6vouqca5s6to2su

Biomechanical Assessments in Sports and Ergonomics [chapter]

Pascal Madeleine, Afshin Samani, Mark de, Uwe Kersting
2011 Theoretical Biomechanics  
MMG assessment has followed EMG development, i.e. from single channel and multichannel MMG recordings (Cescon et al, 2004; Madeleine et al, 2007) enabling to report the topography of the activation profile  ...  This chapter will focus on single bipolar and multi-channels surface electromyography (EMG) or mechanomyography (MMG) .  ...  The second section, Biomechanical modelling, is devoted to the rapidly growing field of biomechanical models and modelling approaches to improve our understanding about processes in human body.  ... 
doi:10.5772/21255 fatcat:oocnhgnqufd5xfwhp3ahh5p54i

Active noise control

S.J. Elliott, P.A. Nelson
1993 IEEE Signal Processing Magazine  
pressure at a monitoring microphone, placed at any single point in the resulting sound field, can be driven to zero.  ...  Unfortunately, it is also probable that at other points in the sound field, the two components of the pressure will be in phase and constructive interference will occur, increasing the sound level at these  ... 
doi:10.1109/79.248551 fatcat:5dzcrcq5zzdfdcxgrhudxtlvg4

Biomimetic approaches to bionic touch through a peripheral nerve interface

Hannes P. Saal, Sliman J. Bensmaia
2015 Neuropsychologia  
Here, we focus on approaches to restore the sense of touch through an electrical interface with the peripheral nerve.  ...  However, grasping and dexterously manipulating objects relies heavily on the sense of touch, without which we would struggle to perform even the most basic activities of daily living.  ...  Touch sensors on the prosthetic hand measure spatio-temporal distributions of pressure, which provide the input to a skin mechanics model.  ... 
doi:10.1016/j.neuropsychologia.2015.06.010 pmid:26092769 fatcat:6muiwosy5fexxn7eeyxn2znqya

Microseismic Monitoring, Positioning Principle, and Sensor Layout Strategy of Rock Mass Engineering

Tianhui Ma, Daoyuan Lin, Chun'an Tang, Kedar Prasad Yadav, Zhiqiang Feng, Ke Ma, Zhijie Wen
2020 Geofluids  
, put forward only sensor arrangement to take mobile, follow the semienclosed layout network.  ...  of rock mass.  ...  In the picture, a total of 6 sensors are installed, and 3 are installed on the walls of both sides of the tunnel at about 1.5 m. The distance between adjacent sensors is controlled at about 50 m.  ... 
doi:10.1155/2020/8810391 fatcat:n6no72nxp5ecxdi4afoga3a56e

Gas flow in a permeable medium

L. M. DE SOCIO, L. MARINO
2006 Journal of Fluid Mechanics  
An accurate prediction of heat fluxes on space vehicles in the Martian CO2 atmosphere requires improvement of Fig. 2: (a) Variations of non-dimensional density, temperature and pressure along the axial  ...  direction of the simulated system for Kn = 1; (b) Density evolutions in time in the cold and hot reservoirs for Kn = 1, with the MD data fitted to exponential and PL curves.  ...  It was also shown that the axial temperature variations of the gas layer adjacent to the wall in the modeling of the thermal creep are of paramount importance.  ... 
doi:10.1017/s0022112006009621 fatcat:kvzjpy276rektja43dydmleeb4
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