A low cost signal acquisition board design for myopathy's EMG database construction

2016 ◽  
Author(s):  
Rim Barioul ◽  
Sameh Fakhfakh Ghribi ◽  
Olfa Kanoun
Keyword(s):  
Low Cost ◽  
Signal Acquisition ◽  
Database Construction

scholarly journals The prototype device for non-invasive diagnosis of arteriovenous fistula condition using machine learning methods

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Marcin Grochowina ◽  
Lucyna Leniowska ◽  
Agnieszka Gala-Błądzińska
Keyword(s):  
Machine Learning ◽  
Arteriovenous Fistula ◽  
Low Cost ◽  
Principal Component ◽  
Special Kind ◽  
Classification Model ◽  
Supervised Machine Learning ◽  
Signal Acquisition ◽  
Non Invasive ◽  
Prototype Device

Abstract Pattern recognition and automatic decision support methods provide significant advantages in the area of health protection. The aim of this work is to develop a low-cost tool for monitoring arteriovenous fistula (AVF) with the use of phono-angiography method. This article presents a developed and diagnostic device that implements classification algorithms to identify 38 patients with end stage renal disease, chronically hemodialysed using an AVF, at risk of vascular access stenosis. We report on the design, fabrication, and preliminary testing of a prototype device for non-invasive diagnosis which is very important for hemodialysed patients. The system includes three sub-modules: AVF signal acquisition, information processing and classification and a unit for presenting results. This is a non-invasive and inexpensive procedure for evaluating the sound pattern of bruit produced by AVF. With a special kind of head which has a greater sensitivity than conventional stethoscope, a sound signal from fistula was recorded. The proces of signal acquisition was performed by a dedicated software, written specifically for the purpose of our study. From the obtained phono-angiogram, 23 features were isolated for vectors used in a decision-making algorithm, including 6 features based on the waveform of time domain, and 17 features based on the frequency spectrum. Final definition of the feature vector composition was obtained by using several selection methods: the feature-class correlation, forward search, Principal Component Analysis and Joined-Pairs method. The supervised machine learning technique was then applied to develop the best classification model.

A Low Cost Hardware and Software Platform for Biomedical Signal Acquisition and Treatment

2019 ◽  
Author(s):  
Joao Victor Melquiades Satiro ◽  
Ianny Andrade Cruz ◽  
Fabio Luiz Sa Prudente ◽  
Danyelle Mousinho Medeiros Santana ◽  
Edson Barbosa Lisboa
Keyword(s):  
Low Cost ◽  
Signal Acquisition ◽  
Software Platform ◽  
Biomedical Signal

scholarly journals Compressed sensing for electrocardiogram acquisition in wireless body sensor network: A comparative analysis

2019 ◽  
Vol 15 (7) ◽  
pp. 155014771986488 ◽  
Author(s):  
Junxin Chen ◽  
Jiazhu Xing ◽  
Leo Yu Zhang ◽  
Lin Qi
Keyword(s):  
Compressed Sensing ◽  
Sensor Network ◽  
Low Cost ◽  
Reconstruction Algorithm ◽  
Signal Acquisition ◽  
Reconstruction Algorithms ◽  
Practical Applications ◽  
Body Sensor Network ◽  
The Past ◽  
Electrocardiogram Signals

In the past decades, compressed sensing emerges as a promising technique for signal acquisition in low-cost sensor networks. For prolonging the monitoring duration of biosignals, compressed sensing is also exploited for simultaneous sampling and compression of electrocardiogram signals in the wireless body sensor network. This article presents a comprehensive analysis of compressed sensing for electrocardiogram acquisition. The performances of involved important factors, such as wavelet basis, overcomplete dictionaries, and the reconstruction algorithms, are comparatively illustrated, with the purpose to give data reference for practical applications. Drawn from a bulk of comparative experiments, the potential of compressed sensing in electrocardiogram acquisition is evaluated in different compression levels, while preferred sparsifying basis and reconstruction algorithm are also suggested. Relative perspectives and discussions are also given.

scholarly journals Feasibility of Using Low-Cost Dual-Frequency GNSS Receivers for Land Surveying

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1956
Author(s):  
Natalia Wielgocka ◽  
Tomasz Hadas ◽  
Adrian Kaczmarek ◽  
Grzegorz Marut
Keyword(s):  
Real Time ◽  
Field Experiments ◽  
Low Cost ◽  
Base Station ◽  
Global Navigation Satellite Systems ◽  
Single Frequency ◽  
Signal Acquisition ◽  
Dual Frequency ◽  
Static Mode ◽  
Land Surveying

Global Navigation Satellite Systems (GNSS) have revolutionized land surveying, by determining position coordinates with centimeter-level accuracy in real-time or up to sub-millimeter accuracy in post-processing solutions. Although low-cost single-frequency receivers do not meet the accuracy requirements of many surveying applications, multi-frequency hardware is expected to overcome the major issues. Therefore, this paper is aimed at investigating the performance of a u-blox ZED-F9P receiver, connected to a u-blox ANN-MB-00-00 antenna, during multiple field experiments. Satisfactory signal acquisition was noticed but it resulted as >7 dB Hz weaker than with a geodetic-grade receiver, especially for low-elevation mask signals. In the static mode, the ambiguity fixing rate reaches 80%, and a horizontal accuracy of few centimeters was achieved during an hour-long session. Similar accuracy was achieved with the Precise Point Positioning (PPP) if a session is extended to at least 2.5 h. Real-Time Kinematic (RTK) and Network RTK measurements achieved a horizontal accuracy better than 5 cm and a sub-decimeter vertical accuracy. If a base station constituted by a low-cost receiver is used, the horizontal accuracy degrades by a factor of two and such a setup may lead to an inaccurate height determination under dynamic surveying conditions, e.g., rotating antenna of the mobile receiver.

MARSEC: A Machine-Readable Spoken English Corpus

1993 ◽  
Vol 23 (2) ◽  
pp. 47-54 ◽  
Author(s):  
Peter Roach ◽  
Gerry Knowles ◽  
Tamas Varadi ◽  
Simon Arnfield
Keyword(s):  
Low Cost ◽  
Digital Data ◽  
Computer Access ◽  
Compact Disk ◽  
Joint Project ◽  
Spoken English ◽  
Database Construction ◽  
The University ◽  
Machine Readable ◽  
Gain Access

The purpose of this paper is to describe a new version of the Spoken English Corpus which will be of interest to phoneticians and other speech scientists. The Spoken English Corpus is a well-known collection of spoken-language texts that was collected and transcribed in the 1980's in a joint project involving IBM UK and the University of Lancaster (Alderson and Knowles forthcoming, Knowles and Taylor 1988). One valuable aspect of it is that the recorded material on which it was based is fairly freely available and the recording quality is generally good. At the time when the recordings were made, the idea of storing all the recorded material in digital form suitable for computer processing was of limited practicality. Although storage on digital tape was certainly feasible, this did not provide rapid computer access. The arrival of optical disk technology, with the possibility of storing very large amounts of digital data on a compact disk at relatively low cost, has brought about a revolution in ideas on database construction and use. It seemed to us that the recordings of the Spoken English Corpus (hereafter SEC) should now be converted into a form which would enable the user to gain access to the acoustic signal without the laborious business of winding through large amounts of tape. Once this was done, we should be able not only to listen to the recordings in a very convenient way, but also to carry out many automatic analyses of the material by computer.

PC104 Interface Recommended for High Speed Data Acquisition Systems

2013 ◽  
Vol 332 ◽  
pp. 119-123
Author(s):  
Dorina Purcaru ◽  
Anca Purcaru
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Low Cost ◽  
Sampling Rate ◽  
Signal Acquisition ◽  
Synchronized Sampling ◽  
Data Acquisition Systems ◽  
High Speed Data Acquisition ◽  
High Speed Data ◽  
Energetic Systems

The interface presented in this paper performs a synchronized sampling of all eight common-mode or differential analog inputs with a high sampling rate. This is a low cost interface, entirely controlled by the PC104 CPU. The paper is focused on design and operation aspects of the synchronized analog-to-digital conversion module. This interface is recommended for high speed data acquisition systems and finds its utility in energetic systems, for monitoring the power quality and for recording different specific transient events. Some programmable electronic modules which perform analog and digital signal acquisition in energetic systems already contain a PC104 interface with synchronized sampling of analog inputs; some experimental results are also presented in this paper.

Design of Process Controller Based on PCI Interface and CPLD Technology

2012 ◽  
Vol 614-615 ◽  
pp. 1562-1565
Author(s):  
Yu Sen Li ◽  
Ying Sun
Keyword(s):  
Real Time ◽  
High Speed ◽  
Low Cost ◽  
Pulse Signal ◽  
Pci Bus ◽  
Signal Acquisition ◽  
Real Time Control ◽  
Time Control ◽  
Interface Chip ◽  
Design Ideas

In order to realize the sensor signal acquisition and analysis of data, according to data acquisition system design ideas of the PCI bus, applying to CPLD complex programmable controller and CH365 interface chip and combined with the actual needs of data collection ,designed a kind of low cost, high speed process controller. CPLD realizes data cache control and the control of reading. This design can gather 16 roads analog signals and real-time pulse signal of 8 roads on the same time, which includes a 16-bit digital output channel and a 32-bit counter, could be used in the real-time control.

PC104 Interface Recommended for High Speed Data Acquisition Systems

2013 ◽  
Vol 325-326 ◽  
pp. 926-929 ◽  
Author(s):  
Dorina Purcaru ◽  
Cornelia Gordan ◽  
Romulus Reiz ◽  
Anca Purcaru
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Low Cost ◽  
Sampling Rate ◽  
Digital Signal ◽  
Signal Acquisition ◽  
Synchronized Sampling ◽  
Data Acquisition Systems ◽  
High Speed Data Acquisition ◽  
High Speed Data

The interface presented in this paper is recommended for high speed data acquisition systems; it performs a synchronized sampling of all common-mode or differential analog inputs with a high sampling rate. This is a low cost interface, entirely controlled by the PC104 CPU. Programmable electronic modules that contain such PC104 interfaces can be found running in the energetic system from Romania; these dedicated equipments perform the analog and digital signal acquisition for monitoring and recording different specific transient events. Some experimental results obtained using the disturbance monitoring device PC-08/104 are also presented in this paper.

scholarly journals Motion Analysis of A Low Cost Customized A-Scan Non Destructive Testing Unit

2018 ◽  
Vol 217 ◽  
pp. 04002
Author(s):  
M.N. M. Zukri ◽  
E. A. Bakar
Keyword(s):  
Low Cost ◽  
Research Field ◽  
Small Scale ◽  
Signal Acquisition ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Current Product ◽  
Stepper Motors ◽  
Research And Education ◽  
Non Destructive

This study introduced a new design of a low-cost customized A-scan Non Destructive Testing (NDT) unit using microcontroller-based scanning motion. the scanning unit from previous research has limitations in scanning envelope area and ability of detection. It can only detect large defects. To solve the limitations mentioned above, the purpose of this study is to develop a device with lower cost, more appropriate size of scanning envelop area, and ability to detect internal layer defections. the mechanism of this machine is achieved by using 3 NEMA 17 bipolar stepper motors for the movement of every axis. MATLAB is used in this machine for the purposes of signal acquisition, signal analysis and to control the linear motions. Since this machine is small in size (40cm x 27cm x 72cm), it can be used for small scale testing and analysis. As compared with current product, this machine is more portable and affordable. Thus, it is more convenient in the areas of research and education. the contributions of this machine is providing an affordable machine for advancement research field and enhancement quality inspection in manufacturing industries.

Surface Electromyographic Signal Acquisition System for Real Time Monitoring of Upper Limbs Muscles

2021 ◽  
Vol 18 (4) ◽  
pp. 1147-1152
Author(s):  
Rafael da Silva Ferraz ◽  
Raiff Sales da Fonseca ◽  
Igor Thonke Rodrigues ◽  
Cláudio Bastos da Silva ◽  
Horácio Tertuliano Santos Filho
Keyword(s):  
Real Time ◽  
Cell Phone ◽  
Low Cost ◽  
Instrumentation Amplifier ◽  
Signal Acquisition ◽  
Passive Components ◽  
Amplification System ◽  
A Cell ◽  
Electromyographic Signal ◽  
Surface Electromyographic Signal

The main goal of this paper is to present the design of a surface electromyography acquisition, processing and amplification system with low power consumption. Based on a micro-controller and a Bluetooth module, it must send the data to a cell phone in real time. The main topology is based on an operational amplifier and passive components in order to produce filters and an instrumentation amplifier applied to Electromyography (EMG). This paper also shows the equations used during design and describes each step of development, from simulations and testing to acquired data and microcontroller programming. In order to produce a low-cost circuit that can be later used as an acquisition tool for portable mechanisms and prosthesis, the design of the main circuit considers the lowest number of components while it does not compromise efficiency.

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