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Implementation of physical Sensors

Implementation of physical Sensors. Jesse McVaney BME281 URI. Modern Sensors. 1917 - Langevin uses piezoelectric effect to create sonar. 1925 – Dr. Tsuji develops the first combustible gas monitor.

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Implementation of physical Sensors

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  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 <www.sparkfun.com/products/8880> • Image 08685-03-L <www.sparkfun.com/products/8685> • Image 09265-1 <www.sparkfun.com/products/9265?> • Fluke: "Why calibrate test equipment?“. FLUKE Corporation, 2004.

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