Wearable Wireless Physiological Sensors Josh Handley Rosy Logioia Gouri Shintri Clay Smith

Problem Background Affective Computing Does our brain processes an emotion before the physiological response or vice versa? Wearable Computers Ubiquitous Computing (Weiser, M. 1991): Computer disappear into the environment so that we would be no longer aware of them and would use them without thinking about them. Pervasive Computing : Interact with information in any place at any time using seamless technology – cell phones, PalmPilots.

Goals and Objectives Measure blood volume pressure Measure skin conductance Record measurements on wearable device unit Transmit measurements wirelessly to a computer Display measurements on Graphical User Interface in real time

Literature and Technical Survey From University funded research To Medical Application To Business Applications.

Design Constraints Minimally intrusive Sensor signals individually distinguishable Low power needs Low cost

Sensors Options Decided to measure two physiological responses: Blood Volume Pulse (BVP) and Skin Conductance Building the sensors Cheap Testing might be dangerous Needs to be calibrated Extra research and work Buying sensors Expensive Already tested and calibrated Ready for immediate use

Wireless Options BlueTooth: –More reliable data transfer 2.4GHz –New technology –Expensive –Still conducting research RF –Simple –Inexpensive

Microcontroller Options 2 microcontrollers (1 sending, 1 receiving) –Sending MCU Discrete sampling of data Future addition of more sensors –Receiving MCU Interfacing with parallel port Silicon Laboratories C8051F015 –Small footprint –Analog/Digital capability –Flash memory

Computer Interfacing Options Parallel –Fairly easy to interface inpout32.dll –High transfer rate not necessary USB

GUI Windows C++ GUI –Real time update of BVP and Skin Conductance –History display of sensor readings Display similar to oscilloscope –Readings through the parallel port

Proposed Design

Design Validation Test individual components Build and test hardware prototype Build and test GUI Combine hardware with GUI and test on human subjects using certain physical and physiological tests

Budget

Team Management Sensors – Gouri Wireless – Clay Microcontrollers – Josh Affective Computing – Rosy

Gantt Chart

Gantt Chart (cont)

Societal, Safety, and Environmental Analysis Industrial settings Military and Public Safety professionals Health Care Construction of prototype Physical experiment To be utilized indoors Transmit data no more than 50 feet away

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