A Wireless Medical Surveillance System

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
2. 1System overview8
3. 2Functional description9
4. Introduction into heart anatomy, cardiac signals and measuring methods10
5. 1The heart and the atrial contraction10
6. 2Cardiac signal characterization and measuring methods12
7. Hardware14
8. 1Hardware architecture14
9. 2Analog measurement hardware design14
10. 2.1System architecture15
11. 2.2Patient safety aspects16
12. 2.3Detailed system description17
13. 3DSP hardware26
14. 3.1Development board overview26
15. 3.2TI TMS320C5402 DSP features27
16. 3.3DSP and DSP board integration29
17. Software31
18. 1DSP software architecture31
19. 2Main program32
20. 3Sensor data acquisition and voltage supervision33
21. 3.1McBSP33
22. 3.2DMA controller36
23. 3.3Timer operation39
24. 4Digital signal processing40
25. 4.1Signal preprocessing41
26. 4.2Beat detection and pulse calculation49
27. 4.3Average beat and pulse trend calculation50
28. 4.4Preamplifier gain setting51
29. 5WAP server communication51
30. 5.1UART51
31. 5.2EWS commands and UART ISR52
32. 6Labview PC-application53
33. Embedded WAP-server55
34. 1Wireless Application Protocol55
35. 1.1The WAP concept55
36. 1.2WAP servers57
37. 2Embedded WAP server (EWS)57
38. 3Medical surveillance WAP application58
39. Bluetooth interface60
40. 1Introduction into Bluetooth60
41. 2WAP over Bluetooth (WOB) Implementation62
42. Conclusions63
43. References64