Force measurement from accelorometer in Soccer ball

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Discussion Overview

The discussion revolves around measuring the impact force of a soccer ball using a 3-axis accelerometer suspended on rubber bands. Participants explore the relationship between oscillation frequency and impact force, as well as potential methods for calculating the force based on the accelerometer's behavior after a collision.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that the impact force will be proportional to the frequency of the oscillations of the accelerometer after a collision.
  • Another participant counters that the frequency is determined solely by the mass of the accelerometer and the elasticity of the rubber bands, implying that it does not directly relate to the impact force.
  • A later reply indicates that the amplitudes of the oscillations, particularly the first amplitude, may provide useful information for calculating the force, but emphasizes the need for calibration of the device.

Areas of Agreement / Disagreement

Participants express disagreement regarding the relationship between oscillation frequency and impact force, with no consensus reached on how to calculate the force effectively.

Contextual Notes

There are limitations regarding the assumptions made about the relationship between oscillation characteristics and impact force, as well as the need for calibration, which remains unresolved.

Nathaniel01
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I have a 3-axis accelerometer suspended on rubber bands inside a soccer ball and am wondering how to calculate the impact force of the ball with it. I have an intuition that the force will be proportional to the frequency of the oscillations of the sensor after a collision but I am having difficulty figuring out anything more specific.

Thanks for any help in advance.
 
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Nathaniel01 said:
I have an intuition that the force will be proportional to the frequency of the oscillations of the sensor after a collision
No. The frequency is determined solely by the mass of the accelerometer and the elasticity of the rubber bands.
 
Svein said:
No. The frequency is determined solely by the mass of the accelerometer and the elasticity of the rubber bands.
Ok, any idea how to calculate the force then? Thanks
 
Nathaniel01 said:
Ok, any idea how to calculate the force then? Thanks
The amplitudes of the oscillations may give something useful, especially the first amplitude. You need to calibrate your device, though.
 

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