A Wireless Medical Surveillance System

Free sample

Inhaltsangabe:Abstract: This thesis has the development of a Digital Signal Processor (DSP) based on an Electro-Cardiogram (ECG) analysis system as its main theme. The system measures cardiac signals using two surface ECG leads from which individual heartbeats and pulse trends are extracted. Processed information can be presented on any Bluetooth enabled Personal Digital Assistant (PDA). The system combines several technologies, e.g. signal measuring and forming unit, DSP hard- and software and a WAP1 server with Bluetooth interface. A basis for this project was a master's thesis that investigates and implements WAP over Bluetooth (see Chapters 5 and 6). The focus of this work is hardware and software design of the ECG measurement and DSP system. The DSP software includes implementation of medical real-time algorithms for heart beat detection, average beat and pulse trend calculation. All algorithms have been implemented using the C language. Inhaltsverzeichnis:Inhaltsverzeichnis: Abstract2 Acknowledgement3 Contents4 Figures6 1.Introduction8 1.1System overview8 1.2Functional description9 2.Introduction into heart anatomy, cardiac signals and measuring methods10 2.1The heart and the atrial contraction10 2.2Cardiac signal characterization and measuring methods12 3.Hardware14 3.1Hardware architecture14 3.2Analog measurement hardware design14 3.2.1System architecture15 3.2.2Patient safety aspects16 3.2.3Detailed system description17 3.3DSP hardware26 3.3.1Development board overview26 3.3.2TI TMS320C5402 DSP features27 3.3.3DSP and DSP board integration29 4.Software31 4.1DSP software architecture31 4.2Main program32 4.3Sensor data acquisition and voltage supervision33 4.3.1McBSP33 4.3.2DMA controller36 4.3.3Timer operation39 4.4Digital signal processing40 4.4.1Signal preprocessing41 4.4.2Beat detection and pulse calculation49 4.4.3Average beat and pulse trend calculation50 4.4.4Preamplifier gain setting51 4.5WAP server communication51 4.5.1UART51 4.5.2EWS commands and UART ISR52 4.6Labview PC-application53 5.Embedded WAP-server55 5.1Wireless Application Protocol55 5.1.1The WAP concept55 5.1.2WAP servers57 5.2Embedded WAP server (EWS)57 5.3Medical surveillance WAP application58 6.Bluetooth interface60 6.1Introduction into Bluetooth60 6.2WAP over Bluetooth (WOB) Implementation62 7.Conclusions63 8.References64 Appendix A - ECG measurements hardware65 Appendix B - DSP software source code73 Appendix C [...]
Read more


3 total

Additional Information

Read more
Published on
Sep 22, 2003
Read more
Read more
Read more
Read more
Best For
Read more
Read more
Technology & Engineering / Electrical
Read more
Content Protection
This content is DRM free.
Read more
Eligible for Family Library

Reading information

Smartphones and Tablets

Install the Google Play Books app for Android and iPad/iPhone. It syncs automatically with your account and allows you to read online or offline wherever you are.

Laptops and Computers

You can read books purchased on Google Play using your computer's web browser.

eReaders and other devices

To read on e-ink devices like the Sony eReader or Barnes & Noble Nook, you'll need to download a file and transfer it to your device. Please follow the detailed Help center instructions to transfer the files to supported eReaders.
Michael Krause
Inhaltsangabe:Abstract: We are facing an increasing bandwidth in the mobile systems and this opens up for new applications in a mobile terminal. It will be possible to download, record, send and receive images and videosequences. Even if we have more bandwidth, images and video data must be compressed before it can be sent, because of the amount of information it contains. MPEG-4 and H.263 are standards for compression of video data. The problem is that encoding and decoding algorithms are computationally intensive and complexity increases with the size of the video. In mobile applications, processing capabilities such as memory space and calculation time are limited and optimized algorithms for decoding and encoding are necessary. The question is if it is possible to encode raw video data with low complexity. Single frames e.g. from a digital camera, can then be coded and transmitted as a video sequence. On the other hand, the decoder needs to be able to handle sequences with different resolution. Thus, decoder in new mobile terminals must decode higher resolution sequences with the same complexity as low resolution video requires. The work will involve literature studies of MPEG-4 and H.263. The goal is to investigate the possibility to encode video data with low complexity and to find a way for optimized downscaling of larger sequences in a decoder. The work should include - Literature studies of MPEG-4 and H.263. - Theoretical study how CIF sequences (352x288-pixel) can be downscaled to QCIF (176x144-pixel) size. - Finding of optimized algorithms for a low complexity encoder. - Implementation of such an encoder in a microprocessor, e.g. a DSP. - Complexity analysis of processing consumption. Prerequisite experience is fair C-programming, signalprocessing skills and basic knowledge in H.263 and MPEG-4 is useful. New mobile communication standards provide an increased bandwidth, which opens up for many new media applications and services in future mobile phones. Video recording using the MMS standard, video conferencing and downloading of movies from the Internet are some of those applications. Even if the data rate is high, video data needs to be compressed using international video compression standards such as MPEG-4 or H.263. Efficient video compression algorithms are the focus of this thesis. Very limited computational capabilities of the terminals require low complexity encoder and decoder. A low complexity encoder for usage with [...]
Michael Krause
Begegnungen am CERN - Menschen, die die Geheimnisse des Universums entschlï¿1⁄2sseln/Michael Krause stellt sie uns vor
Eine ï¿1⁄2wissenschaftliche Sensationï¿1⁄2, ein ï¿1⁄2historischer Meilensteinï¿1⁄2, historisch so bedeutend wie die Mondlandung: Als Wissenschaftler des CERN im Juli 2012 die Existenz eines ï¿1⁄2Gottesteilchensï¿1⁄2, das allen anderen Teilchen Masse verleiht, mit einer Wahrscheinlichkeit von mehr als 99,999 Prozent bestï¿1⁄2tigten, waren die Reaktionen ï¿1⁄2berwï¿1⁄2ltigend. Schlieï¿1⁄2lich arbeiten die Forscher hier an nichts Geringerem als an der Entschlï¿1⁄2sselung der Geheimnisse des Universums. Die Suche nach dem Grund des Daseins und dem Ursprung aller Materie ist auch
das Thema dieses Buches.

Trï¿1⁄2ume, Visionen, Forschungen: die Menschen stehen im Mittelpunkt Das ï¿1⁄2Gottesteilchenï¿1⁄2, die Erforschung der ï¿1⁄2Dunklen Materieï¿1⁄2 und der ï¿1⁄2Dunklen Energieï¿1⁄2 und der stï¿1⁄2rkste je gebaute Teilchenbeschleuniger der Welt - all das sind die spannenden Bestandteile des Buches. In den Mittelpunkt seiner Arbeit stellt Krause jedoch die Menschen am CERN, ihren Hintergrund, ihre Geschichte, ihre Arbeit, ihre Forschungen, Trï¿1⁄2ume und Visionen - sie sind das Hauptthema des Buches. Krause verleiht den wissenschaftlichen Forschungen am CERN somit ein persï¿1⁄2nliches Gesicht und schreibt das Portrait einer ganzen Generation von Wissenschaftlern, die in den vergangenen Jahrzehnten an der
sogenannten ï¿1⁄2Neuen Physikï¿1⁄2 gearbeitet haben.

Eine Auswahl an Interviewpartnern von Michael Krause -- Top-Wissenschaftler am CERN, die einen groï¿1⁄2en Anteil am Nachweis des Higgs-Boson und damit zum Physik-Nobelpreis 2013 beigetragen haben.

Rolf-Dieter Heuer, als Generaldirektor des CERN dafï¿1⁄2r zustï¿1⁄2ndig, dass das CERN mit all seinen verschiedenen Experimenten und den 10000 Mitarbeitern, reibungslos funktioniert

Tejinder Virdee, Chefarchitekt des sogenannten "CMS-Experiments", eines "Allround-Apparats, der der Suche nach dem Higgs-Boson und Dunkler Materie" dient (Zitat aus dem Buch)

Lyndon Evans, Projektleiter fï¿1⁄2r den Bau des LHC (Large Hadron Collider), an dem die Kernexperimente stattfanden, um das Higgs-Boson nachzuweisen

Tara Shears, im Rahmen des sogenannten LHCb-Experiments hauptsï¿1⁄2chlich damit befasst, das Standardmodell der Teilchenphysik, zu dem das Higgs-Boson gehï¿1⁄2rt, zu testen

John Ellis, der meistzitierte Physiker aller Zeiten, hat die Bezeichnung "Theory of Everything" (Theorie fï¿1⁄2r alles) geprï¿1⁄2gt; er hat viel zum theoretischen Verstï¿1⁄2ndnis des Standardmodells beigetragen, zu dem das Higgs-Boson gehï¿1⁄2rt, und befasst sich auch mit Theorien jenseits des Standardmodells

Jonathan Butterworth leitet einen Teil des sogenannten ATLAS-Experiments, das ebenfalls zum Nachweis des Higgs-Bosons durchgefï¿1⁄2hrt wurde

©2017 GoogleSite Terms of ServicePrivacyDevelopersArtistsAbout Google
By purchasing this item, you are transacting with Google Payments and agreeing to the Google Payments Terms of Service and Privacy Notice.