Team Members Nitish Barman

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CodeBlue
A Wireless, Web-Enabled, Health Monitoring System
Team Members Nitish Barman Scott
Bowser Kashif Khan Shefat
Sharif Faculty Advisor Oge Marques, Ph.D.
Florida Atlantic University Boca Raton, Florida,
USA
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Outline

• Motivation
• Design Concept
• System View
• Wearable Unit
• Design Considerations
• Implementation Issues
• Base Station Software
• Web Server Software
• Marketability Issues
• Manufacturability Issues
• Future Improvements
• Summary

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Motivation

• Improved Health Care
• Reduced length of hospitalization
• Enhanced patient comfort
• Early detection of medical emergencies
• Constant health monitoring
• Typical Health Monitor
• Stationary
• Bulky heavy
• Too many wires

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Design Concept
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Wearable Unit Design Considerations

• Small, Light Portable
• Low Power Consumption
• Run on typical 9V battery
• Robust Durable
• User friendly interface
• LED indicators
• Several audible alerts
• Inexpensive

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Wearable UnitBlock Diagram

• Wearable Unit
• Collects data from the different sensors
• Transmits and receives data packets through the
  Bluetooth transceiver
• Alerts user through status LEDs and buzzer
  alerts

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Wearable Unit Flow
Check Shock
Room Temp
Check Shock
Skin Temp
Check Shock
Heart Rate
Check Shock
Check Battery
Process Base Station commands
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Microcontroller

• The 68HC12 is programmable in C using an IAR
  compiler with CSPY debugger

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Accelerometer

• Analog Devices ADXL202
• Measures tilt through digital output lines
• Measures shock and acceleration through analog
  outputs

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Shock Sensor
Shock Sensor
Microcontroller
Shock is detected if the sum of the samples is
greater than the set limit as determined through
testing
17 sample integrator
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Temperature Sensor

• DS1620 Dallas Semiconductor
• Measurements accurate within 0.1 Co

reset
clock
data
Microcontroller Unit
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Temperature Protocols

• Sensor Mode Four
• Three wire communications
• Perform only one temperature reading
• High Resolution
• Extends accuracy to 0.1o C
• Calculation based on temperature dependent counter

Calculate High Resolution Temperature from
Readings
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Heart Rate Monitor
Microcontroller Unit

• Signal is taken from the wrist receiver as a
  negative going pulse for each heart beat
• Heart rate comes from chest strap sensor /
  transmitter
• Average taken as frequency over three samples

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Base Station Design Considerations

• Standard Platform
• Windows 9X compliant software
• Work with laptop or desktop
• Easily ported to Windows CE
• Web server
• Supports Active Server Pages
• Windows IIS server
• User friendly graphical interface
• Clean, intuitive, functional layout

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Base Station Software

• Allows system customization for specific patients
• Interprets wearable units data
• Based on health status
• Provides user feedback via the GUIs
• Logs data for web server access
• Bluetooth stack courtesy of Cstack.com

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Base Station Flow
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Base Station Flow
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Main Screen
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Web Server Design Considerations

• Fast loading pages
• Limit the server side scripting done for each
  page
• Avoid parsing large log files
• Logical data presentation
• Allow user to choose a range of data to view
• Server side scripting
• Increases speed for slow client machines
• Only error checking is done client side

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Web Server Scripts

• Remote Monitoring
• Health care professionals and concerned family
  can monitor patient
• Graphical Data
• Client can view data in graphical and tabular
  format
• Patient Instructions
• Remote client can send text message instructions
  or reminders

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Web Server Flow
Login
Current Sensor Readings
Send Instructions
Choose Chart (time range and sensor)
Display Desired Chart
All data is read from text files stored on the
host machine
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Graphical Trends

• Choosing a plot
• Determine an hourly time interval
• Determine which sensor(s) to plot
• Graph generation
• Applet takes formatted data
• A GIF is returned to the client
• Script is modified from Javaside.com

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Marketability

• Target Markets
• Families of the elderly
• Nursing home health care
• Hospitals clinics
• Marketability
• Provides inexpensive peace of mind
• Alleviates the burden of bulky equipment
• Allows complete mobility when coupled with
  wireless Internet

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Manufacturability

• Package size
• Size of a cell phone
• Sensors
• Medical grade temperature sensors
• Hard wired heart rate monitor
• Power
• Rechargeable cell phone style battery
• Convert to 3V logic for low power consumption

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Prototype Cost Analysis

• Our Wearable Unit Design
• MCU / eval. board 150
• Temp 7 (2)
• Accel. 14
• Regulator 5.50
• HRM 50
• Op Amp 2.5 (2)
• Miscellaneous 50
• Bluetooth board (150)
• TOTAL 275
• (425)

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Future Improvements

• Added features
• LCD on the wearable unit
• Battery meter rather than low indicator
• Hard wired heart rate monitor
• Add tilt feature of the accelerometer
• Software additions
• Real time updates on web data
• Database backend for long term trend monitoring
• Full duplex audio from wearable unit to remote
  web client

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Summary

• CodeBlue
• Portable
• Small light weight
• Wireless
• Simple user friendly
• Inconspicuous
• Constant monitoring
• immediate action

• Typical Health Monitor
• Stationary
• Bulky heavy
• Too many wires

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Thank You
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