The amazing accelerometer
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The Amazing Accelerometer. Single Unit (about $4). Which way’s up?. 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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The amazing accelerometer

The Amazing Accelerometer

Single unit about 4

Single Unit (about $4)

Which way s up

Which way’s up?

Basis of the technology

Basis of the Technology

Another view

Another view





Guidance navigation


Structural health monitoring

Structural Health Monitoring

Sports medicine concussions

Sports Medicine: Concussions

Fitbit and nike fuel

FitBit and Nike Fuel

The amazing accelerometer

Accelerometer Design: Frequency Response

  • Very low r values = good design

Accelerometer design phase lag

Accelerometer Design: Phase Lag


The amazing accelerometer

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.

Where does damping come from

Where does damping come from?

Dynamic viscosity of air


Squeeze Film Damping: Thin film of air interacts with silicon masses in motion

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