I am developing a vibration measurement tool for my master degree and I would like to ask you few questions,
Currently I am using the ADXL335 accelerometer and an arduino UNO board as a data acquisition tool. Once I read the accelerometer values, I send them to labview using LIFA_Base software to perform the FFT and get the Frequency spectrum in labview.
I attach you few pictures about the Labview program and about what I am getting.
As you can see, I get lot of noise in the frequency spectrum, I have selected 350 samples to be over the double of the measured frequency (160 Hz) and perform the FFT.
According to the ADXL datasheet, capacitors act as a Low pass filter and, for some situations, the have to be replaced for other with a different value. Also I think that maybe I should have to make a small offset or similar.
Any help would be appreciated,