User's Manual

44
Chapter 5
COMMON USAGE OF EAGLE
Eagle is designed to make measurements
daily while using the battery for several years
without the need of dismantling.
ENERGY SAVING IS A KEY INPUT
1. CONFIGURATION
Eagle is ready for embedded processing, but
for the moment Eagle’s firmware is capable of
measuring time signals which can be post processed in XPR.
1.1. TIME SIGNAL
To perform a diagnostic we recommend the following signals
Signal
Sampling
frequency (Hz)
Nbr. of
points
Type
T-512Hz-4k
512
4096
WAV LF
T-5.12kHz-16k
5120
16384
WAV MF
T-51.2kHz-16k
51200
16384
WAV HF
1.2. FFT
FFT can be processed in XPR based on the signal above. A new FFT post-processing was
developed in XPR. Its name is “Spectrum”. It needs only to define the signal to process and
the number of lines of the FFT. Spectrum is a FFT with Hanning window / 75% overlap /
Unilateral amplitude.
Name
Signal to process
Nbr. of
lines
FFT range (Hz)
Corresponding
# of average
FFT LF
T-512Hz-4k
800
0-200
5
FFT MF
T-5.12kHz-16k
1600
0-2000
10
FFT HF
T-51.2kHz-16k
800
0-20000
20
1.3. PARAMETERS
You can use all the parameters that XPR can post-process to configure your defect detection
grid.
XPR gives you the possibility to set thresholds for your parameters.
Refer to XPR user manual.
Battery life
Network
performance
Signals for
diagnostic
Figure 30: find the right balance