Biomedical Embedded Systems Technology Presentation for ENSC 440305 Instructors Dr Andrew Rawicz Steve Whitmore Department of Engineering Science Simon Fraser University 2 Team Members ID: 1045330
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1. 1Biomedical Monitoring SystemBiomedical Embedded Systems TechnologyPresentation for ENSC 440/305 Instructors: Dr. Andrew Rawicz, Steve Whitmore Department of Engineering ScienceSimon Fraser University
2. 2Team MembersMotivationSystem Overview HardwareSoftwareBudgetBusiness PlanSchedulingProblems EncounteredFuture ExtensionsQuestionsOutline
3. 3Team MembersAlireza Rahbar (CEO)Farzad Abasi (CTO)Sam Sayfollahi (VP of Marketing)Parna Niksirat (VP of Operation)Shaghayegh Hosseinpour (VP of R&D)
4. 4Motivation28.5 % of all death in U.S. are caused by cardiovascular diseases in 2002World Health OrganizationIn 2006, heart disease was the leading cause of death in U.S.American Heart AssociationEvery minute CVD cause one death in U.S. American Heart Association
5. 5 Analyzing the heartbeatMeasure, amplify and record the natural electrical potential created by the heartECG Signal Bandwidth: o.5Hz ~ 100 HzECG Signal Amplitude:~1mVElectrocardiogram (ECG)
6. 6Electrocardiogram (ECG)
7. 7Our DesignNon-invasive and mobileMonitoring result is transferable to medical professionalsAffordable
8. 8System Overview
9. 9Hardware Overview
10. 10Hardware- ECG Circuit
11. 11ECG Circuit-Block DiagramPROTECTIONCIRCUITDIFFERENTIAL AMPLIFIER (AD620)NOISE FILTERING & AMPLIFICATIONOUTPUTRIGHT LEGDRIVEINPUTS(Right & Left Hand Signals)
12. 12Hardware- Microcontroller8bit RISC AVR Processor (A T mega644)10MHz External crystal oscillator8 digit to analog (ADD) 10 bit resolution15 Digital Input/OutputUART interface64K Internal Program Flash2K Internal EEPROM4K Internal SRAM8 MB External Serial Flash: Suitable to save acquired data from sensor
13. 13Hardware- WirelessPower Output: 100 mW (20 dBm)Indoor/Urban range: Up to 1200 ft(370m)Outdoor/RF line-of-sight range: up to 15 miles (24 km)Receiver sensitivity: -106 dBmRF data rate: 9.6 KbpsSupply Voltage: 3-3.6 VDCFrequency Band: 910-918 MHz
14. 14Software OverviewGraphical User Interface (GUI)Wireless ModuleData Acquisition SystemOn-Board Flash Memory
15. 15GUI
16. 16Software OverviewGraphical User Interface (GUI)Wireless ModuleData Acquisition SystemOn-Board Flash Memory
17. 17WirelessAcquire data from micro-controllerSend data to receiver Receive dataCommunicate with GUI
18. 18
19. 19Business PlanEstimated Cost For Mass Production:Subsystem Estimated Micro-Controller $15Wireless Module-Dash7 VIII (Biomedical) $5PCB $3Total Cost $23
20. 20Proposed and ActualBudgetSubsystem Estimated Actual Micro-controller $40 $107Daughter board module for USB connection $40 $66Connector module for micro-controller and related wires $10 BorrowedHeart beat sensor (ECG) leads and wires $250 BorrowedWireless (transmitter and receiver) $100 $100Shipping costs $40 $20Parallel port to USB converter $20 $10ECG circuit parts $50 $180Total cost $550 $483
21. 21ScheduleBlue Line : Actual Time Gray Line : Estimated Time
22. 22Problems EncounteredMicro-Controller Communication ProblemsSynchronization of dataWireless Communication problem One UART port availableGraphical User Interface (GUI)CPU UsageSlow-motion graphingECG Circuit and NoiseNoise reductionDifferentiation
23. 23Future ExtensionsMaking the device more user-friendly and practical by using:Printed Circuit Board (PCB) instead of breadboardBluetooth transmission instead of Xbee moduleAdditional electrodesMore efficient wireless module (Dash7)
24. 24ConclusionPortable ECG monitoring device Wireless functionalityUSB ConnectivityOn-Board Flash MemoryCustom ECG circuit Graphical User Interface (GUI)Importance of team work & collaborationProblem Solving
25. 25Thanks toDr. Andrew RawiczSteve WhitmoreDr. Lucky OneEngineering Student Society Dr. MehdiMoradiDr. Ash ParameswaranSteve SwiftAli OstadfarSara MoghaddamjooArash Ahmadi
26. 26Questions