How to choose the right total acquisition time?

JTam.1 · ‎2021-05-10

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?

niccolò · ‎2021-05-11

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

niccolò · ‎2021-05-11

Hi @JTam.1 ,

what ODR are you working with?

Niccolò

JTam.1 · ‎2021-05-11

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

niccolò · ‎2021-05-11

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