The Figure 8 shows a screen capture of the previously mentioned
PC application, which was developed in Windows platform with
Visual C++ IDE. There are some program’s parameters that can
be changed in the program, like the frequency measurement, the
baud rate, etc.
What can be seen in the figure is the following:
• In the upper part of the screen, the waveform of the tremor
signal measured by the accelerometer can be appreciated (both
x and y channels).
• In the lower part, the Power Spectrum of the Fast Fourier
Transform (FFT) of these signals is shown, for both channels
respectively. In this case, the first graph shows that in the x
channel there is an 8.6Hz signal predominant, which is a
tremor measured