WATTECO BoB Assistant, Справочное руководство

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Bob Assistant - Reference Manual
2023-04-04 - Version 1.0 10
2.1.3.1.1. First learning session
Once BoB ASSISTANT is started, it will enter a first Learning session, which will last for a few hours (~1 to
4 hours for a machine with a simple vibration cycle, e.g. Air Conditionning unit).
This learning session will create a first dataset for the embedded AI algortihms and store the
“screenshots” of the corresponding vibration signatures.
For each measure, it will perform a Fast Fourrier Transform (FFT):
It will then add each new signal information to the vibration signature dataset.
For example, after a few hours of operation, the dataset could have more than 30 “screenshots” for the
vibration signature of the machine:
In the first seven days of operation, BoB ASSISTANT will continue monitoring new vibration signatures,
and add them to the dataset.
After this period of time, no new vibration signature will be added to the dataset, unless it is required
through a Downlink command (see § IV Downlink (LoRa to device) ).
During a learning session, BoB ASSISTANT will wake up every 60 seconds (default value, configurable,
see § 4.2 Change sampling period ) to sample the signal, perform the FFT of the vibration signature and
compare and record the sampling to the dataset. BoB ASSISTANT ’s dataset is able to record up to 20
different vibration signature zones.
Not to scale
Sleep
mode
wake-up
and
sample
signal
FFT
calculation
Vibration
screenshot
compare
and record
Device processing activity during learning sessions
time
Learning sampling period =
60 seconds
=