A practical bedsheet system for the non-contact and continuous monitoring of heart electric activities.

Wu, Kin Fai.Thesis (M.Phil.)--Chinese University of Hong Kong, 2008.Includes bibliographical references (leaves 88-91).Abstracts in English and Chinese.Abstract --- p.i槪要 --- p.iiAcknowledgements --- p.iiiTable of Contents --- p.ivList of Figures --- p.viList of Tables --- p.xChapter Chapter 1 --- Introduction --- p.1Chapter 1.1 --- Motivation --- p.1Chapter 1.2 --- Outline of the Proposed Design --- p.2Chapter 1.3 --- Purposes of the Present Study --- p.2Chapter Chapter 2 --- Background and Literature Review --- p.4Chapter 2.1 --- Electrocardiogram --- p.4Chapter 2.2 --- Conventional ECG Measurement --- p.7Chapter 2.3 --- Heart Rate --- p.8Chapter 2.4 --- Heart Rate Variability --- p.9Chapter 2.5 --- Capacitive Sensing --- p.11Chapter 2.6 --- Review of ECG Monitoring System by Capacitive Sensing On a Sleeping Bed --- p.14Chapter Chapter 3 --- System Design and Implementation --- p.17Chapter 3.1 --- Hardware --- p.17Chapter 3.1.1 --- Bedsheet Sensor --- p.17Chapter 3.1.2 --- Pre-amplifier --- p.21Chapter 3.1.3 --- Measuring Device --- p.30Chapter 3.1.4 --- Power Supply & PCB Layout --- p.49Chapter 3.2 --- Software --- p.52Chapter 3.2.1 --- Detection of R Waves --- p.52Chapter 3.2.2 --- Tracking of HR & Mean RR Intervals --- p.55Chapter 3.2.3 --- Estimation of Signal-to-Noise Ratios --- p.56Chapter Chapter 4 --- Preliminary Tests on the Functionality of the Proposed System --- p.57Chapter 4.1 --- Test I - Test on the Arrangement of Electrodes --- p.57Chapter 4.1.1 --- Methods --- p.57Chapter 4.1.2 --- Results --- p.60Chapter 4.2 --- Test II - Test on the ECG Measurement of Subjects in Different Sleeping Postures --- p.64Chapter 4.2.1 --- Methods --- p.64Chapter 4.2.2 --- Results --- p.65Chapter Chapter 5 --- Experiments on the Performance of Continuous Monitoring of ECG and HR --- p.69Chapter 5.1 --- Experiment I - Experiment on the Reliability of the Proposed System for Continuous Monitoring of ECG and HR on Thirty Subjects --- p.69Chapter 5.1.1 --- Methods --- p.70Chapter 5.1.2 --- Results --- p.70Chapter 5.2 --- Experiment II - Experiment on the Feasibility of the Proposed System for Continuous Monitoring of ECG and HR on a Subject During an Eight-hour Sleep --- p.75Chapter 5.2.1 --- Materials --- p.76Chapter 5.2.2 --- Methods --- p.76Chapter 5.2.3 --- Results --- p.77Chapter Chapter 6 --- Discussions --- p.81Chapter 6.1 --- Selection of the Passband of the Proposed Circuit --- p.81Chapter 6.2 --- Arrangement of Electrodes on the Bedsheet --- p.82Chapter 6.3 --- Practical Design of Electrodes --- p.83Chapter 6.4 --- Performance of Continuous Monitoring of HR by Using the Proposed System --- p.84Chapter Chapter 7 --- Conclusion --- p.86References --- p.8