Seans Research and Stuff

1
Seans Research and Stuff

• By Sean Hoyt October 10, 2001
• DMS Laboratory EE1-159

2
Main Areas of Research

• Radio Frequency Identification (RFID)
• Understanding
• Optimization Cypris PSoC
• Extending into other sensing areas
• Portable Chemical Sensor Electronic Nose
• ?controller and LCD interface
• PCA display for chemical discrimination
• Art/Tech Beginnings

3
RFID Understanding the Basics

• System is comprised of a reader, antenna, and
  tag.
• Antenna and tag act as a loosely-coupled
  transformer

4
Quick Run-through

• RFID fun-damentals

5
RFID Optimization

• Match antenna to the readers current amplifier
• Improve decoding of AM signal from tag
• PSoC
• Move external components such as the crystal,
  decoding section, RS232 section onto one chip
• Save power, real-estate, costs and time

6
Extending RFID

• Use decoding voltages to correlate the distance
  from antenna to tag
• Distance measurement resolution of 7.8mm.
• Future work may involve extracting moisture
  content, density and other properties of an
  object a tag is embedded into.

7
Portable Chemical Sensor System

• Using Sams array of sensors, a chemical can be
  characterized
• Each sensor will react differently to the analyte
• The combination of reactions forms a pattern
• Principal components analysis is used to display
  the combination in 2D for a person to make the
  distinction
• ?controller and LCD interface
• Do an AD conversion on each sensor to find its
  voltage
• Make matrix internally and apply the PCA values
• Use LCD to plot the real-time 2D point
• Compare location of 2D point to known 2D points
  of other chemicals on the screen

8
Combining Art with Technology

• Create a visualization of vapor propagation
• Use Light Emitting Polymers (LEPs) and polymer
  chemical sensors together in an array

Chemical Direction
9
Conclusion

• I have a lot of work to do