Implementation of physical Sensors

1
Implementation of physical Sensors

• Jesse McVaney
• BME281 URI

2
Modern Sensors

• 1917 - Langevin uses piezoelectric effect to
  create sonar.
• 1925 Dr. Tsuji develops the first combustible
  gas monitor.
• 1958 Kilby develops first integrated circuit
  for Texas Instruments making it possible to
  significantly reduce the size of circuits.

3
Sensor Types

• Motion/ Position
• Force
• Temperature
• Vibration
• Current/ Resistance
• Light
• Chemical

4
Examples
www.sparkfun.com
5
Homemade Sensors
6
Standards

• Sensors may have to comply with strict standards
  to be implemented for medical use.
• Degree of accuracy, maintenance schedule,
  material all factor in to how a sensor may be
  implemented.
• American National Institute Standard code ANSI
  Z540 covers these requirements

7

• Instruments may have to undergo periodic
  calibrations (Annual, monthly, Case per Case)
• Calibrations may require a standard at least ten
  times as accurate as the instrument under test
  (Fluke)
• Implantable sensors may need to be constructed of
  certain materials to avoid toxicity, allergic
  reaction, or to withstand the environment they
  are operating in.

8
Cost

• Prices vary widely depending on the material,
  intended use and liability coverage.
• ANSI codes are meant to protect patients but may
  consequently make some procedures or equipment
  unaffordable.

9
Future

• Less expensive synthetic material.
• Clearer transmission signals
• Faster sample rates
• Smaller implantable/wearable devices
• Fewer Calibrations needed.

10
Sources cited

• Image 08880-03-L ltwww.sparkfun.com/products/8880gt
• Image 08685-03-L ltwww.sparkfun.com/products/8685gt
• Image 09265-1 ltwww.sparkfun.com/products/9265?gt
• Fluke "Why calibrate test equipment?. FLUKE
  Corporation, 2004.