VibrAn is designed for estimation of machines vibration levels.
The program works with accelerometer sensor embedded in your phone. It gets the raw data from the sensor, process it and shows visually the result.
Vibrations from machine (under estimation) needs to be transferred to the phone's body. It could be done by placing the phone over the machine. If machine vibrates too intensive then it is better to dump such vibrations prior transferring it to the phone's body. For dumping excessive vibrations one could use spacer between the machine and phone made from thick cloth or insulation foam.
Main functions:
* Plot vibrations amplitude along the time line (time domain representation);
* Plot vibrations spectrum (frequency domain representation). On most phones there will be 0-50Hz spectrum range in normal mode and 0-100Hz range in Turbo mode;
* Save raw accelerometer data in to the file (for further off-line processing);
* Loading of previously saved data for analysis and comparison;
* Processing of loaded data with: Fourier transform, reverse Fourier transform, band pass filter;
Usage instruction: https://hot-chip.com/forum/viewtopic.php?id=36