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The Amazing Accelerometer

The Amazing Accelerometer. Single Unit (about $4). Which way’s up?. http://www.youtube.com/watch?v=KZVgKu6v808#t=246. Basis of the Technology. Another view. Biomedical. Automotive. Guidance/Navigation. Structural Health Monitoring. Sports Medicine: Concussions. FitBit and Nike Fuel.

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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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