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Unable to find vibration velocity from ADXL356 accel data.

sarath dorapalli
Prodigy 85 points

Hi All,

We want to implement condition based monitoring system, for this we have selected MSP432 microcontroller and ADXL356(analog accelerometer). The controller measured the vibrations in electric drives, samples from the accelerometer(mounted on electric drive) are taken and sent to a remote computer.

In the remote computer we have to show vibration velocity. We tried equations from motion physics but we are not able to derive vibration velocity from accelerometer data. Can any one tell how vibration velocity can be derived. 

The sampling rate is 10240 samples/sec.

I am not sure where to post this issue, hence i am posting it here. help me to post the concern in the correct forum.

  • 0
    Genius 3330 points

    You need to integrate the acceleration over time to obtain velocity. Easy to do in your micro.

  • 0 in reply to eltury
    Prodigy 85 points
    Hi Eltury, thanks for your reply

    we have performed integration based on the below formula

    dv/dt = a

    dv = a*dt

    integrating on both sides

    v = a(t1-t0)

    where t1-t0 is 1/10240 = 97.6 micro. is the above understanding correct.

    or should it be (a1-a0)*(t1-t0)

    where a1 and a0 acceleration sample 1 and 0 respectively, t1 and t0 are sample times of a1 and a0.

    Thanks

    Regards
    Sarath.D

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