How to choose the right total acquisition time?

I use IIS3DWB vibration sensor. I set maximum bandwidth 6.3 kHz and FFT size 2048. What acquisition time should I use when using MotionSP library?

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Best answer by niccolò

Hi @JTam.1 ,

I would say that you need at least 2x6.3 ksamples to respect Nyquist, , so with an ODR of 26.667 kHz you would need half a second per acquisition.

Niccolò

ST Employee

Hi @JTam.1 ,

what ODR are you working with?

Niccolò

Visitor II

The ODR of IIS3DWB vibration sensor is 26667 Hz with bandwidth 6.3 kHz.

ST Employee

Hi @JTam.1 ,

I would say that you need at least 2x6.3 ksamples to respect Nyquist, , so with an ODR of 26.667 kHz you would need half a second per acquisition.

Niccolò

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