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The Amazing Accelerometer

Learn about the innovative accelerometer technology used in various fields including biomedical, automotive, and sports medicine. Discover the principles behind its design, frequency response, and the importance of minimizing phase lag for accurate measurements.

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The Amazing Accelerometer

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  1. The Amazing Accelerometer

  2. Single Unit (about $4)

  3. Which way’s up? http://www.youtube.com/watch?v=KZVgKu6v808#t=246

  4. Basis of the Technology

  5. Another view

  6. Biomedical

  7. Automotive

  8. Guidance/Navigation

  9. Structural Health Monitoring

  10. Sports Medicine: Concussions

  11. FitBit and Nike Fuel

  12. Accelerometer Design: Frequency Response • Very low r values = good design

  13. Accelerometer Design: Phase Lag -f

  14. The Problem with Phase Lag If not designed properly, phase lag causes the measured signal to deviate from the actual acceleration. (Above example would be for a BAD design.). Ideally, you want to design for zero phase distortion.

  15. Where does damping come from? Dynamic viscosity of air c Squeeze Film Damping: Thin film of air interacts with silicon masses in motion

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