1. Revisimo Remote Vital Sign Monitor

2. About us Dr. Thomas Morris Advisor Cory Zywno EE Data Transmission Matthew Galloway EE ADC & Temperature Sensor Matthew Gallups EE Alarm & ADC Aaron Cheeseman EE Monitor & PCB design Paul Jang CPE Data Transmission & Website

3. Overview Introduction Problem/Solution Constraints –Technical –Practical Technical Approach Progress Timeline Questions

4. Introduction What is Revisimo? –Digital wireless Thermometer

5. Current Problem Hospital equipment –Expensive –Hard to use Market (oral, tympanic, scanning) –Inaccurate & No Alarm –Difficulty of Continuously Monitoring

6. Solution Bandage –Wireless –Temperature Sensing Device Base station –Alarm –Temperature set by the user

7. System Overview

8. Constraints Revisimo must meet a set of predetermined technical and practical constraints ensuring that the device will be competitive in the home-healthcare market. Technical Constraints outline Revisimo’s functionality. Practical Constraints define usability.

9. Technical Constraints Battery Life Revisimo must have a minimum battery life of seven days. Wireless The bandage and monitor must communicate with each other within a 100-foot radius (indoors). Alarm System The alarm must be triggered if a user defined temperature is reached. Also, the alarm must be audible from at least 30 feet away. Temperature Precision Revisimo must calculate the core body temperature within 0.5 °F. Revisimo must read temperatures within the range of 65 °F to 110 °F. Visual Distance The display must present data to the user at a distance of up to 3 feet.

10. Manufacturability The bandage must fit on the temple and the monitor must be handheld.

11. Political Revisimo must abide by Federal Communications Commission regulations and allocations of the radio spectrum (9kHz to 3THz).

12. Wireless Protocols in Unlicensed Bands NameFrequency Band Data RateNominal RangeApplication ZigBee900 MHz; 2.4 GHz 250 kbit/s10m - 100 mWSNs Bluetooth2.4 GHz1 Mbit/s10 mPANs Wi-Fi2.4 GHz54 Mbit/s100 mWireless Internet Ultra Wideband 3.1 – 10.6 GHz110 Mbit/s10 mMultimedia

13. Microprocessors NameSizeIntegrated Radio ADCComm. Interfaces Resources Available CC24307 mm x 7 mm 2.4 GHz DSSS 12 bits UART, SPI Prototyping Boards/Stack PIC246 mm x 6 mm None10 bits UART, I 2 C, SPI Code examples for PIC architecture

14. Temperature Sensing Devices Name# of wires or pins CostSensitivityLinear Thermistor2Low-MidGoodNo Resistance Temperature Detector (RTD) 2-4Low-HighPoorYes Thermocouple2Low- HighPoorNo Digital IC’sMultipleLow-MidGoodYes

15. Fourier’s Law of Heat Conduction Bandage reduces ambient, evaporative, and environmental heat loss

16. Progress: Radio Testing

17. Progress: ADC Noise 0x1327: 0 0x1328: 3 0x1329: 29 0x132A: 2656 0x132B: 2656 0x132C: 7773 0x132D: 11340 0x132E: 8045 0x132F: 2576 0x1330: 320 0x1331: 9 0x1332: 0 Total: 33232 Reduces accuracy of measurements Measure a thermistor multiple times

18. Timeline JanuaryFebruaryMarchApril Research Radio Hardware Assembly Testing

19. References [1] http://www.longbeachrealestatehome.com/m/blogs/lbreh/bandaid.jpg, Accessed: February 18, 2009 [2] Information Technology Strategic Plan, http://www.fcc.gov/omd/strategicplan/InfoTechnologyPlansandReports/itsp-07-23- 02.pdf, Accessed: February 18, 2009 [3] http://www.ussensor.com/pgthermistors.html, Accessed: February 23, 2009 [4] http://www.omega.com/toc_asp/subsectionsc.asp?book=Temperature&subsection=C 11&flag=1, Accessed: February 23, 2009 [5] http://www.omega.com/guides/thermocouples/Unsheathed.html, Accessed: February 23, 2009 [6] http://media.digikey.com/photos/Texas%20Instr%20Photos/296-SOT-23-6.jpg, Accessed: February 23, 2009 [7] I. G. Finvers, J. W. Haslett, and G. Jullien, “Wireless Temporal Artery Bandage Thermometer.” Biomedical Circuits and Systems Conference, 2006. BioCAS 2006. IEEE, pp.166-169, Nov. 29 2006-Dec. 1 2006. [Online] Available http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4600334&isnumber=4600290

20. Questions?

21. Thank you!