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High-Resolution Seismocardiogram Acquisition and Analysis System

Fábio Leitão, Eurico Moreira, Filipe Alves, Mário Lourenço, Olga Azevedo, João Gaspar, Luis A Rocha
2018 Sensors  
The high resolution of the MEMS accelerometer used provides a better signal for SCG wave recognition, enabling a more consistent study of the diagnostic capability of this technique in clinical analysis  ...  positioned on chest).  ...  Conflicts of Interest: The authors declare no conflicts of interest.  ... 
doi:10.3390/s18103441 pmid:30322147 pmcid:PMC6211127 fatcat:ss7ofxcm2nbuljpiykmo7zrfbm

Estimation of Indoor Physical Activity Level Based on Footstep Vibration Signal Measured by MEMS Accelerometer in Smart Home Environments [chapter]

Heyoung Lee, Jung Wook Park, Abdelsalam(Sumi) Helal
2009 Lecture Notes in Computer Science  
It also supports the localization of footstep sources, extraction of statistical parameters on daily living pattern, and identification of pathological gait pattern.  ...  Unlike other sensors such as cameras or microphones, MEMS accelerometer sensor can measure many biomedical signatures without invoking personal privacy concerns.  ...  of statistical parameters on daily living pattern, and identification of pathological gait pattern, based on connected MEMS sensors, which measures floor vibration induced by footstep on human activity  ... 
doi:10.1007/978-3-642-04385-7_11 fatcat:rq6i66cplbembilzicbh467lwe

A review of wrist pulse analysis

Suguna GC, Veerabhadrappa ST
2019 Biomedical Research  
Practitioner determines the unhealthiness of a subject, based on the wrist pulse parameters such as pulse strength, amplitude shape, vega, rhythm, pulse width and transition period.  ...  Evaluation of the vital information of the components depends exclusively upon the perception of the practitioner and varies from practitioner to practitioner based on his/her expertise or experience.  ...  MEMS pressure sensors: Sun et al. developed a wearable device based on Micro Electro Mechanical System (MEMS) pressure sensors were used to detect the pulse wave velocity.  ... 
doi:10.35841/biomedicalresearch.30-19-174 fatcat:dxwbzryp65fclc4ljto6ei5tk4

Wearable Pulse Wave Monitoring System Based on MEMS Sensors

Yu Sun, Ying Dong, Ruyi Gao, Yao Chu, Min Zhang, Xiang Qian, Xiaohao Wang
2018 Micromachines  
The MEMS pressure sensors,the blood oxygen detector and the accelerometer are fixed on the expected locations of the flexible PCB.  ...  The K value, related to the area of the pulse wave, can be obtained. Both the PWV and K value meet the health parameter standards.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/mi9020090 pmid:30393366 pmcid:PMC6187337 fatcat:74pbmiyedjhhddotutclc5uz2e

A Laterally Vibrating Lithium Niobate MEMS Resonator Array Operating at 500C in Air [article]

Savannah R. Benbrook, Caitlin A. Chapin, Ruochen Lu, Yansong Yang, Songbin Gong, Debbie G. Senesky
2019 arXiv   pre-print
This paper is the first report of the high-temperature characteristics of a laterally vibrating piezoelectric lithium niobate (LiNbO_3) MEMS resonator array up to 500C in air.  ...  The temperature-dependent quality factor (Q) and electromechanical coupling coefficient (k_t^2) are extracted and reported.  ...  Rinaldi, "Spectroscopic chemical sensing based on narrowband MEMS resonant infrared detectors," 2018 IEEE SENSORS, New Delhi, India, Oct. 2018, pp.  ... 
arXiv:1911.10276v3 fatcat:3wotwmdrd5hn5ktvak7cja5bsq

Wafer-Level-Based Open-Circuit Sensitivity Model from Theoretical ALEM and Empirical OSCM Parameters for a Capacitive MEMS Acoustic Sensor

Jaewoo Lee, Jong-Pil Im, Jeong-Hun Kim, Sol-Yee Lim, Seung-Eon Moon
2019 Sensors  
We present a simple, accurate open-circuit sensitivity model based on both analytically calculated lumped and empirically extracted lumped-parameters that enables a capacitive acoustic sensor to be efficiently  ...  Analytical ALEM can separate the intrinsic capacitance from the capacitance of the acoustic sensor itself, while empirical OSCM, on the basis of one additional test sample excluding the membrane, can extract  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/s19030488 fatcat:4hugnmgp4zgujjn26f54h37zye

Interference Signal Identification of Sensor Array Based on Convolutional Neural Network and FPGA Implementation

Lin Huang, Xingguang Geng, Hao Xu, Yitao Zhang, Zhiqiang Li, Jun Zhang, Haiying Zhang
2021 Electronics  
In this paper, an interference signal recognition algorithm of the sensor array based on a convolutional neural network (CNN) is proposed.  ...  Firstly, a simple mechanical structure model was established to analyze the generation mechanism of interference signals in one MEMS sensor array acquisition system.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/electronics10222867 fatcat:5j5ps4ac5vbenknldk2dnx762u

A New Macro-Model of Gas Flow and Parameter Extraction for a CMOS-MEMS Vacuum Sensor

Shu-Jung Chen, Yung-Chuan Wu
2020 Symmetry  
The macro-model is based on the description of the physical characteristics of heat transfer and the characteristic parameters of the CMOS-MEMS vacuum sensor.  ...  The proposed model was built and the characteristic parameters in the model were obtained based on a CMOS-MEMS thermopile patterned with circular symmetry and an embedded heater as a heat source.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/sym12101604 fatcat:icvyxw3m6rg5zgndoygaxocuqu

Structural Health Monitoring for Composite Materials [chapter]

Jian Cai, Lei Qiu, Shenfang Yuan, Lihua Shi, PeiPei Liu, Dong Liang
2012 Composites and Their Applications  
Characteristic parameters can be then extracted from Lamb wave signals for damage monitoring. Damage location is usually based on the time of flight (TOF) of Lamb wave signals.  ...  The model-based methods undertake structural model analysis and use model characteristic parameters to identify defects, while non-model based ones permit damage detection relying on the vibration characteristics  ... 
doi:10.5772/48215 fatcat:u6n2ey7ecncyjh6bc2r3kmylye

Aluminum Nitride SOI Lamb-wave Resonators towards Multi-frequency, Multi-sensitive Temperature Sensor Platform

Margarita Narducci, Marco Ferrari, Vittorio Ferrari, Humberto Campanella
2014 Procedia Engineering  
Future developments of this work will consider ASIC implementations of thermometric beat frequency sensors based on multiple frequencies provided by two or more MEMS resonators.  ...  Inset: Detail of top Mo patterning. Fig. 2 . 2 Measured frequency characteristic of Lamb wave resonators with various wavelengths λ.  ... 
doi:10.1016/j.proeng.2014.11.370 fatcat:yfofptu2j5ayvaubtyw56xy6iu

Design of a Novel Medical Acoustic Sensor Based on MEMS Bionic Fish Ear Structure

Chenzheng Zhou, Junbin Zang, Chenyang Xue, Yuexuan Ma, Xiaoqiang Hua, Rui Gao, Zengxing Zhang, Bo Li, Zhidong Zhang
2022 Micromachines  
This paper proposes a new bionic acoustic sensor based on the fish ear structure.  ...  An electroacoustic test platform is built to test the performance of the sensor. The results showed that the MEMS bionic sensor operated with a bandwidth of 20 Hz–2k Hz.  ...  Based on this process, a bionic MEMS acoustic sensor is designed as the core component of the MEMS electronic stethoscope, as shown in Figure 1b .  ... 
doi:10.3390/mi13020163 pmid:35208288 pmcid:PMC8880548 fatcat:y2n3p7hlwrgq7ortegeul2j36m

RELIABILITY OF MEMS ACCELEROMETERS FOR INSTRUMENTAL INTENSITY MAPPING OF EARTHQUAKES

Gulum Tanircan, Hakan Alcik, Kemal Beyen
2018 Annals of Geophysics  
The performance of the MEMS-50 sensor is also investigated on free field conditions.  ...  Two types of MEMS sensors and a reference sensor are tested under excitations of sweeping waves and scaled earthquake recordings. Transfer functions and correlation coefficients are compared.  ...  Confidence interval ranges of amplitudes may be decided based on responses of individual sensors.  ... 
doi:10.4401/ag-7501 fatcat:3qfitxi3vvbfnlk65mocxijyli

Accelerometer Based Joint Step Detection and Adaptive Step Length Estimation Algorithm Using Handheld Devices

Yu Liu, Yanping Chen, Lili Shi, Zengshan Tian, Mu Zhou, Lingxia Li
2015 Journal of Communications  
Furthermore, the proposed joint step detection and adaptive step length estimation algorithm can help much in the development of Pedestrian Navigation Devices (PNDs) based on the handheld inertial sensors  ...  Furthermore, the signal patterns of the sensor could differ significantly depending on the carrying modes and the user's hand motion.  ...  When the MEMS sensors are fixed on the foot, the step length is calculated based on the switch sensor, pressure sensor, ground reaction force, and mobile mode of foot [12] .  ... 
doi:10.12720/jcm.10.7.520-525 fatcat:qly7gc6mcjb23pltotdum5ejxq

A Bionic MEMS Electronic Stethoscope with Double-sided Diaphragm Packaging

Sicun Duan, Weidong Wang, Sai Zhang, Xi Yang, Yu Zhang, Guojun Zhang
2021 IEEE Access  
In this paper, an electronic stethoscope is designed based on a bionic Micro-Electro-Mechanical System (MEMS) sound-sensitive sensor.  ...  Besides, comparing the heart sound signals collected by DMES and a commercial electronic stethoscope (Model 3200, 3M Littmann, USA), the high consistency of the two signals' characteristic parameters in  ...  An acoustic sensor based on MEMS is small in size, can be mass-produced, and have better temperature stability.  ... 
doi:10.1109/access.2021.3058148 fatcat:mmkzzfsdvrcn3d47wn3nlrlhdy

MEMS Microphone Array Sensor for Air-Coupled Impact-Echo

Robin Groschup, Christian Grosse
2015 Sensors  
The MEMS microphone array sensor is cost effective, less sensitive to undesired effects like acoustic noise and has an optimized sensitivity for signals that need to be extracted for IE data interpretation  ...  A comparative measurement between the array sensor, a conventional accelerometer and a measurement microphone clearly shows the suitability of MEMS type microphones and the advantages of using these microphones  ...  He also came up with the concept of an array based Impact-Echo sensor. Christian Grosse supervised the work, gave contributions during the development and helped in editing and finalizing the article.  ... 
doi:10.3390/s150714932 pmid:26121610 pmcid:PMC4541815 fatcat:qfebvdi6dvactbrt6xaoiyq25u
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