A Wireless Medical Surveillance System

Studienarbeit, die am 01.04.2001 erfolgreich an einer Universität in Deutschland im Fachbereich Elektronik und Informationstechnik eingereicht wurde. 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: |Abstract|2 |Acknowledgement|3 |Contents|4 |Figures|6 1.|Introduction|8 1.1|System overview|8 1.2|Functional description|9 2.|Introduction into heart anatomy, cardiac signals and measuring methods|10 2.1|The heart and the atrial contraction|10 2.2|Cardiac signal characterization and measuring methods|12 3.|Hardware|14 3.1|Hardware architecture|14 3.2|Analog measurement hardware design|14 3.2.1|System architecture|15 3.2.2|Patient safety aspects|16 3.2.3|Detailed system description|17 3.3|DSP hardware|26 3.3.1|Development board overview|26 3.3.2|TI TMS320C5402 DSP features|27 3.3.3|DSP and DSP board integration|29 4.|Software|31 4.1|DSP software architecture|31 4.2|Main program|32 4.3|Sensor data acquisition and voltage supervision|33 4.3.1|McBSP|33 4.3.2|DMA controller|36 4.3.3|Timer operation|39 4.4|Digital signal process