A Wireless Medical Surveillance System

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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:Abstract2Acknowledgement3Contents4Figures61.Introduction81.1System overview81.2Functional description92.Introduction into heart anatomy, cardiac signals and measuring methods102.1The heart and the atrial contraction102.2Cardiac signal characterization and measuring methods123.Hardware143.1Hardware architecture143.2Analog measurement hardware design143.2.1System architecture153.2.2Patient safety aspects163.2.3Detailed system description173.3DSP hardware263.3.1Development board overview263.3.2TI TMS320C5402 DSP features273.3.3DSP and DSP board integration294.Software314.1DSP software architecture314.2Main program324.3Sensor data acquisition and voltage supervision334.3.1McBSP334.3.2DMA controller364.3.3Timer operation394.4Digital signal processing404.4.1Signal preprocessing414.4.2Beat detection and pulse calculation494.4.3Average beat and pulse trend calculation504.4.4Preamplifier gain setting514.5WAP server communication514.5.1UART514.5.2EWS commands and UART ISR524.6Labview PC-application535.Embedded WAP-server555.1Wireless Application Protocol555.1.1The WAP concept555.1.2WAP servers575.2Embedded WAP server (EWS)575.3Medical surveillance WAP application586.Bluetooth interface606.1Introduction into Bluetooth606.2WAP over Bluetooth (WOB) Implementation627.Conclusions638.References64Appendix A - ECG measurements hardware65Appendix B - DSP software source code73Appendix C []

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