The document summarizes the development of a novel non-contact electrode for mobile electrocardiogram (ECG) monitoring. It describes the design of the non-contact electrode which uses a conducting plate separated from the skin by an insulating layer to capacitively couple ECG signals. The document outlines the system architecture including the non-contact electrodes, wireless acquisition module, and mobile platform. Experimental results show the non-contact electrode can accurately acquire ECG signals across clothing with high correlation to conventional electrodes. It also effectively detects arrhythmias and reduces motion artifacts with increased pressure. The non-contact electrode provides a practical way for long-term, unobtrusive ECG monitoring.
This project explains a simple wireless battery charger circuit that charges your mobile when placed near the transmitter.
This circuit may be used as wireless power transfer circuit, wireless mobile charger circuit, wireless battery charger circuit, etc.
This project explains a simple wireless battery charger circuit that charges your mobile when placed near the transmitter.
This circuit may be used as wireless power transfer circuit, wireless mobile charger circuit, wireless battery charger circuit, etc.
Smart cameras capture high-level descriptions of a scene and perform real-time analysis of what they see. These low-cost, low-power systems push the design space in many dimensions, making them a leading-edge
application for embedded system research.
This is a report describing what actually dataloggers is.A data logger (also datalogger or data recorder) is an electronic device that records data over time or in relation to location either with a built in instrument or sensor or via external instruments and sensors. Increasingly, but not entirely, they are based on a digital processor (or computer).The logger usually refers to the usage of a class in log4j. The logger is a member object whose function e.g. severe is called. The logger usually logs into a file (this can be configured through log4j.xml or some other config file or during the program start).
Latest Electrical Mini Projects For EEE Studentselprocus
Simple Mini Projects For EEE Can Be Implemented By Using Microcontroller And Different Technologies. We Hope That Our Innovative Projects For EEE Students Offer Immense Help And Make Them Select Suitable Projects For Their Project Work.
https://www.elprocus.com
Visit our page to get more ideas on Electrical Mini Projects developed by professionals.
Elprocus provides free verified electronic projects kits around the world with abstracts, circuit diagrams, and free electronic software. We provide guidance manual for Do It Yourself Kits (DIY) with the modules at best price along with free shipping.
A Real Time Electrocardiogram (ECG) Device for Cardiac PatientsIJERD Editor
Now-a-days due to rising stress levels, change in lifestyles and a variety of different issues, the number of people suffering from heart related diseases is increasing. This number would significantly rise in the next few years. As the technology enhanced, a significant paradigm shift has been observed in the biomedical industry. To tackle the heart related issues, technology can be introduced in one’s life. This paper proposes a wireless, wearable ECG device capable of processing the patient’s ECG in a real time environment. It is capable of comparing the ECG with threshold parameters, and if ECG of the patient is not in the range of the threshold values, the device notifies the cardiac patient’s mobile phone by sending a Multimedia Messaging Service (MMS) of the changed ECG and, in turn the patient’s mobile phone sends this changed ECG image to the mobile phone present at the hospital.
Smart cameras capture high-level descriptions of a scene and perform real-time analysis of what they see. These low-cost, low-power systems push the design space in many dimensions, making them a leading-edge
application for embedded system research.
This is a report describing what actually dataloggers is.A data logger (also datalogger or data recorder) is an electronic device that records data over time or in relation to location either with a built in instrument or sensor or via external instruments and sensors. Increasingly, but not entirely, they are based on a digital processor (or computer).The logger usually refers to the usage of a class in log4j. The logger is a member object whose function e.g. severe is called. The logger usually logs into a file (this can be configured through log4j.xml or some other config file or during the program start).
Latest Electrical Mini Projects For EEE Studentselprocus
Simple Mini Projects For EEE Can Be Implemented By Using Microcontroller And Different Technologies. We Hope That Our Innovative Projects For EEE Students Offer Immense Help And Make Them Select Suitable Projects For Their Project Work.
https://www.elprocus.com
Visit our page to get more ideas on Electrical Mini Projects developed by professionals.
Elprocus provides free verified electronic projects kits around the world with abstracts, circuit diagrams, and free electronic software. We provide guidance manual for Do It Yourself Kits (DIY) with the modules at best price along with free shipping.
A Real Time Electrocardiogram (ECG) Device for Cardiac PatientsIJERD Editor
Now-a-days due to rising stress levels, change in lifestyles and a variety of different issues, the number of people suffering from heart related diseases is increasing. This number would significantly rise in the next few years. As the technology enhanced, a significant paradigm shift has been observed in the biomedical industry. To tackle the heart related issues, technology can be introduced in one’s life. This paper proposes a wireless, wearable ECG device capable of processing the patient’s ECG in a real time environment. It is capable of comparing the ECG with threshold parameters, and if ECG of the patient is not in the range of the threshold values, the device notifies the cardiac patient’s mobile phone by sending a Multimedia Messaging Service (MMS) of the changed ECG and, in turn the patient’s mobile phone sends this changed ECG image to the mobile phone present at the hospital.
Life Detection Using Microwaves TechnologySai Spandana
One of my first attempts to make a presentation. This presentation is based on a Research Article titled "A MODERN MICROWAVE LIFE DETECTION SYSTEM FOR
HUMAN BEING BURIED UNDER RUBBLE" published in the International Journal of Advanced Engineering Research and Studies
International Journal of Computational Engineering Research(IJCER) ijceronline
International Journal of Computational Engineering Research(IJCER) is an intentional online Journal in English monthly publishing journal. This Journal publish original research work that contributes significantly to further the scientific knowledge in engineering and Technology.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
A nonlinearities inverse distance weighting spatial interpolation approach ap...IJECEIAES
Spatial interpolation of a surface electromyography (sEMG) signal from a set of signals recorded from a multi-electrode array is a challenge in biomedical signal processing. Consequently, it could be useful to increase the electrodes' density in detecting the skeletal muscles' motor units under detection's vacancy. This paper used two types of spatial interpolation methods for estimation: Inverse distance weighted (IDW) and Kriging. Furthermore, a new technique is proposed using a modified nonlinearity formula based on IDW. A set of EMG signals recorded from the noninvasive multi-electrode grid from different types of subjects, sex, age, and type of muscles have been studied when muscles are under regular tension activity. A goodness of fit measure (R2) is used to evaluate the proposed technique. The interpolated signals are compared with the actual signals; the Goodness of fit measure's value is almost 99%, with a processing time of 100msec. The resulting technique is shown to be of high accuracy and matching of spatial interpolated signals to actual signals compared with IDW and Kriging techniques.
A low-cost electro-cardiograph machine equipped with sensitivity and paper sp...TELKOMNIKA JOURNAL
The price of electrocardiograph (ECG) machine on the market is very high. Currently, the technology used is still very complicated and ineffective, and the ECG machine cannot be connected to other devices. A new development of a low-cost ECG machine with a customized design was needed to integrate the machine with other devices. Therefore, the purpose of this study is to develop a low-cost ECG machine which can be connected to other devices and equipped with sensitivity and paper speed setting. So that portable ECG machines can be produced and used at small clinics in the society. In this study, the main controller of the 12 channels ECG machines was supported by ATMEGA16 microcontroller, that is available on the market at low prices. The main part of the ECG amplifier is built using a high common mode rejection ratio (CMRR) instrumentation amplifier (AD620) and a bandpass filter which the cutoff frequency for highpass filter and lowpass filter are 0.05 Hz and 100 Hz, respectively. In order to complement the previous study, some features were introduced such as selectivity and motor speed option. In this study, 10 participants are involved for data acquisition,and an ECG phantom was used to calibrate the machine. The performance of the ECG machine was evaluated using standard measurement namely relative percentage error (% error) and uncertainty (UA). The result shows that %error from all of the feature is less than 2% and the UA is 0.0 which shows that the ECG machine is feasible for diagnostic purposes.
A Wireless ECG Plaster for Real-Time Cardiac Health Monitoring in Body Senso...ecgpapers
In this paper we present a wireless ECG plaster
that can be used for real-time monitoring of ECG in cardiac
patients. The proposed device is light weight (25 grams),
wearable and can wirelessly transmit the patient’s ECG signal to
mobile phone or PC using ZigBee. The device has a battery life of
around 26 hours while in continuous operation, owing to the
proposed ultra-low power ECG acquisition front end chip. The
prototype has been verified in clinical trials.
Accelerometer and EOG Based Wireless Gesture Controlled Robotic ArmIJMER
- This paper deals with the Robotic arm controlled by arm and eye movements, where data
is acquired through the use of accelerometer and EOG amplifier. The hand movements are captured by
the Accelerometer and the eye movements are captured by EOG amplifier. The Robotic arm will pick
and place the object according to the movement of the hand and Robotic arm will move left and right
according to our eye movements. Signals are wirelessly transmitted through RF Encoder and Decoder.
Robotic arm is based on Arduino Duemilanove controller for signal processing, and interfaced with the
Controller serially. This Embedded system will help disabled persons to do work by their own. The
Robotic arm can be used to pick and place hazardous objects.
Evaluating ECG Capturing Using Sound-Card of PC/Laptopijics
The purpose of the Evaluating ECG capturing using sound-card of PC/Laptop is provided portable and low
cost ECG monitoring system using laptop and mobile phones. There is no need to interface microcontroller
or any other device to transmit ECG data. This research is based on hardware design,
implementation, signal capturing and Evaluation of an ECG processing and analyzing system which attend
the physicians in heart disease diagnosis. Some important modification is given in design part to avoid all
definitive ECG instrument problems faced in previous designs. Moreover, attenuate power frequency noise
and noise that produces from patient's body have required additional developments. The hardware design
has basically three units: transduction and conditioning Unit, interfacing unit and data processing unit.
The most focusing factor is the ECG signal/data transmits in laptop/PC via microphone pin. The live
simulation is possible using SOUNDSCOPE software in PC/Laptop. The software program that is written
in MATLAB and LAB-View performs data acquisition (record, stored, filtration) and several tasks such as
QRS detection, calculate heart rate.
AN ELECTRICAL IMPEDANCE TOMOGRAPHY SYSTEM FOR THYROID GLAND WITH A TINY ELECT...ijbesjournal
Electrical impedance Tomography (EIT) is a non-invasive imaging technique based on measuring of the
electrical conductivity and capacitance of abnormal and normal human tissues. The present work aims to
develop an EIT imaging system for imaging thyroid gland. Patients with thyroid nodules were eligible for
the study. The study was conducted on two groups of participants: control group consists of 20 normal
female cases and experimental consists of 20 goiter female patients. The thyroid nodule location, size, and
type measured by ultrasound. Thyroid gland conductivity and permittivity were recorded using EIT. The
impedance measurement is done through the applying of two probes: one probe to the neck region
(scanning probe) and the rest region (reference probe) with electrolytic gel for each probe, then the system
software proceeds to reconstruct the image and calculate the electrical impedance of the thyroid gland on
a personal computer which acts as an output display and storage for case information. The thyroid
scanning probe has 64 electrodes embedded on a small space (30 mm diameter and 50 mm height) inside
of the probe. Multifrequency impedance measurements are typically made by applying an electric current
to a target mass by using of the scanning probe and measuring the developed voltage. The present EIT
system provides real- time visualization of the spatial distribution of the electrical properties of the thyroid
tissue. Images obtained from the bioimpedance (BI) were compared to images obtained from the
ultrasound imaging, results showed great similarity between the two diagnostic images. Tumor tissue has
higher resistance and capacitance value than that of normal thyroid gland.
Wavelet based Signal Processing for Compression a Methodology for on-line Tel...iosrjce
IOSR journal of VLSI and Signal Processing (IOSRJVSP) is a double blind peer reviewed International Journal that publishes articles which contribute new results in all areas of VLSI Design & Signal Processing. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced VLSI Design & Signal Processing concepts and establishing new collaborations in these areas.
Design and realization of microelectronic systems using VLSI/ULSI technologies require close collaboration among scientists and engineers in the fields of systems architecture, logic and circuit design, chips and wafer fabrication, packaging, testing and systems applications. Generation of specifications, design and verification must be performed at all abstraction levels, including the system, register-transfer, logic, circuit, transistor and process levels
An ECG Compressed Sensing Method of Low Power Body Area NetworkNooria Sukmaningtyas
Aimed at low power problem in body area network, an ECG compressed sensing method of low
power body area network based on the compressed sensing theory was proposed. Random binary
matrices were used as the sensing matrix to measure ECG signals on the sensor nodes. After measured
value is transmitted to remote monitoring center, ECG signal sparse representation under the discrete
cosine transform and block sparse Bayesian learning reconstruction algorithm is used to reconstruct the
ECG signals. The simulation results show that the 30% of overall signal can get reconstruction signal
which’s SNR is more than 60dB, each numbers in each rank of sensing matrix can be controlled below 5,
which reduces the power of sensor node sampling, calculation and transmission. The method has the
advantages of low power, high accuracy of signal reconstruction and easy to hardware implementation.
Design and Implementation of Real Time Remote Supervisory SystemIJERA Editor
In today’s fast growing communication environment and rapid exchange of data in networking field has triggered us to develop a home based remote supervisory monitoring system. In the present paper the physiological parameters of the patient such as body temperature, ECG, Pulse rate and Oxygen Saturation is displayed in MATLAB graphical user interface which is processed using ARM7 LPC2138. In case any emergency persist and parameters goes abnormal over the optimum level then a buzzer will ring to alert the caretaker. And the vital parameters will be displayed on the patient side computer and an automatic SMS will be sent to the doctor using GSM interface.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
Student information management system project report ii.pdf
Seminar
1. Department of ECE , BIT
Seminar On
“Development of Novel Non-contact
Electrodes for Mobile Electrocardiogram
Monitoring System”
Presented By: Guided by:
Suraj.B.S Shailaja.V
1BI11EC107 Lecturer
BIT Dept of ECE, BIT
3. INTRODUCTION`
Electrocardiography (ECG) is one of the most widely used vital sign sensing
and health monitoring methods and provides useful diagnostic information
about the cardiovascular system.
The conventional contact clinical ECG system employs 12 or 15 Ag-AgCl
electrodes (wet ECG), which are affixed to specific parts of the chest, arms, or
hands and legs.
Dry Electrode consists metal plate is placed on the skin instead of wet
electrodes, so the problems of using gel are eliminated. However, it still has
direct contact with the body.
Our proposed capacitively coupled Non-Contact Electrode consists of thin
layer of insulator is placed between the body and the metal electrode . The
electrodes can be unnoticeably applied to a cloth that can be worn by the
patient to provide ubiquitous (U) health- care ECG sensing.
4. Heart Nodes
The contraction of any muscle is associated with electrical changes called
depolarization and these changes can be detected by electrodes attached to
the surface of the body.
The electrical discharge for each cardiac cycle normally starts in a special area
of the right atrium called the ‘sinoatrial node’.
There is a delay while the depolarization spreads through another special area
in the atrium, the ‘atrioventricular node’ .
The electrical discharge travels very rapidly, down specialized conduction
tissue: first a single pathway, the ‘bundle of His’, which then divides in the
septum between the ventricles into right and left bundle branches.
The left bundle branch itself divides into two. Within the mass of ventricular
muscle, conduction spreads somewhat more slowly, through specialized tissue
called ‘Purkinje fibres’.
7. Design
The basic concept of the proposed novel non-contact electrode is to
construct a conducting plate covered by an insulating layer to form a
parallel plate capacitor with the skin. Therefore, the non-contact electrode can
couple bio- potential signals capacitively to a bio-amplifier.
In order to reduce the influence of the varying and high impedance of the skin-
electrode interface, an impedance converter is used to connect to the
conducting plate.
metal plate
skin
insulating layer
d1 d2
vref
r1 r2
vout
8. Architecture
The system hardware consists of non-contact electrodes, a wireless ECG
acquisition module, and a mobile system platform.
The proposed non-contact electrode was designed to measure ECG without
contacting the user’s skin directly. Therefore, the user can wear the non-contact
electrode to monitor real- time ECG across thin clothes.
The proposed wireless ECG acquisition module was designed to acquire ECG
from the non-contact electrodes, and transmit it to the mobile system platform
wirelessly via Bluetooth.
An ECG monitoring program built into the mobile system platform will
continuously monitor the user’s heart rate.
When the abnormal heart rate is detected, the ECG monitoring program can
send an SMS message with raw ECG data to the backend healthcare server to
request emergency treatment.
9. GSM modem
GSM Network
Basic Scheme of Monitoring System
physician
non
contact
electrode
acquisition module mobile platform backend server
10. Implementation
The circuit of non-contact electrode is placed in the opposite side of the conducting
plate.
The gap between the PCB and the shielding layer is filled with hot melt adhesive to
hold the conducting plate.
The shielding layer is formed by covering with aluminum foil, and plastic tape is
also used to cover the non-contact electrode to form the isolation layer.
The electrode is topped with Velcro so it can be attached to clothing easily and
conveniently.
11. Wireless ECG Acquisition Module
The front-end amplifier circuit, which contains a pre-amplifier and a band-pass
filter, was designed to amplify and filter ECG signals obtained from the non-
contact electrodes.
The amplified ECG signal is digitized by a 12-bit analog-to-digital converter
(ADC), built into the microprocessor, with a sampling rate of 512 Hz.
The microprocessor (TI MSP430) was used to control the ADC and peripheral
circuits, and send ECG data to Bluetooth module.
The size of the wireless ECG acquisition module is about 7.5 × 3.5 cm2. It
operates at 25 mA with a 3.7-V DC power supply, and can continuously operate
over 35 hours with a commercial 1100 mAh Li-ion battery.
13. Mobile System Platform
A commercial mobile phone with the Android operation system was used as the
mobile system platform in this study. An ECG monitoring program, developed
using the Eclipse IDE with Android SDK and Java Development Kit, was built into
the mobile system platform to monitor the user’s heart rate.
In the beginning, the ECG monitoring program calls the BT API thread to locate the
Bluetooth device.
When the wireless ECG acquisition module is found, the BT API thread will try to
create an SPP stream to connect the mobile phone with the wireless ECG
acquisition module. Then, received ECG data will be sent to BUFFER, and displayed
on the screen.
The AGLO thread, designed by using the heart rate detection algorithm calculates
heart rate from ten-second ECG data every five seconds.
If an abnormal state of heart rate is detected, the ECG monitoring program will call
the SMS API thread to send an SMS message to the backend healthcare server.
Figure shows the screenshot of the ECG monitoring program.
15. Results
1 . Quality of ECG
2 . Effect of Motion Artifacts
3 . Arrhythmia Detection Test
16. Quality of ECG
Bio-potentials measured by using the proposed non- contact electrode across thin
clothes are compared with that of disposable surface electrodes.
The experimental results show that the ECG signal measured by using the proposed non-
contact electrode across thin clothing contains a little high-frequency interference.
The correlation of ECG signals obtained by using the proposed non-contact electrode
and the disposable surface electrode in the time domain and in the frequency domain is
about 98.43% and 97.09% respectively.
The measurement of ECG complex for different electrodes was tested. A total of 20-trial
ECG records obtained from healthy participants were used for analysis. For the proposed
non-contact electrode, the amplitude and duration of QRS wave are 1.08 ± 0.0322 mV
and 77.4 ± 7.279 ms.
For the disposable surface electrode, the amplitude and duration of QRS wave are 1.05 ±
0.0293 mV and 77.05 ± 5.511 ms. The experimental results show that the ECG complexes
measured by using the proposed non-contact and disposable surface electrodes are
similar.
17.
18. Effect of Motion Artifacts
In this experiment, a fixing waist belt was applied with different pressures to
control the tightness between the body and the non-contact electrodes. Here,
the applied pressure levels are high, middle, and low.
the ECG signal qualities with high pressure under both static and dynamic
states provide better signal-to-noise ratio (SNR).
Walking will also result in a change in the skin-electrode interface equivalent
capacitance and static electricity to induce more noise.
This can be effectively reduced while a high pressure is applied to increase the
tightness between the body and the non-contact electrodes.
19. Comparison between ECG signal qualities by applying different pressures.
Static sitting posture: static state Walking: dynamic state.
20. Arrhythmia Detection Test
True Positive : There is a R wave in ECG, and it is correctly detected as a R wave.
False Positive : There is not a R wave in ECG, but it is wrongly detected as a R wave.
True Negative : There is not a R wave in ECG, and it is correctly detected as not a R wave.
False Negative :There is a R wave in ECG, but it is wrongly detected as not a R wave.
ppv = tp/(tp + fp)
sensitivity = tp/(tp + fn)
accuracy = 1 – (fp + fn)/total
The results for detecting heart rate are listed in Table I. The values of PPV, sensitivity, and
accuracy of detecting the arrhythmia patients’ heart rates by using the proposed non-
contact electrode are about 98.54%, 99.75%, and 97.37% respectively.
21. R wave Non R wave Total
R wave 2031(tp) 24(fn) 2055
Non R wave 30(fp) 5(tn) 35
Total 2061 29 2090
22. Conclusion
The experimental results show and the correlation of signal qualities using the
non-contact electrode and conventional ECG electrode is high.
The effect of motion artifacts on the signal quality of the non-contact electrode
was also investigated. The experimental results show applying suitable pressure
to reduce the transversal motion and lateral motion of the non-contact
electrode can effectively improve the signal quality, even while exercising.
The experimental results show that both of the sensitivity and accuracy for
detecting arrhythmia by using the proposed non-contact electrode are high
and it can be accurately applied for monitoring abnormal heart rate.
The above experimental results show that the proposed non-contact electrode
presents an effective way to acquire bio-potentials without contacting the skin
directly, and is practicable to be embedded in normal clothing for long-term
ECG monitoring in daily life.
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