Geta Sandals with accelerometer

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Geta Sandals with accelerometer
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Problems of the GETA

• Ultrasonic signal might be Obstructed between two
  sandals
• E.g. going up/down stairs
• Moving both feet at the same time
• E.g. jumping
• Ultrasonic signal out of range

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Proposed solution

• Add two accelerometer sensors (3-axis) on the
  left sandal.
• applying software double integration to measure
  the displacement.

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Simple procedure
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Random noise may cause the drift problem
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More accurate procedure

• Kalman filter
• Effective tool in reducing random noise
• Displacement estimates
• Least squares fit
• Applying the law of invariants

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End
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Questions

• How about the change of the angulations during a
  step?