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Performing anomalie detection on a battery volatge using LSTM-RNN

Data Science Asked on August 5, 2021

I am trying to detect anomalies in a battery output voltage for one month.

I have the next data frame, as it is shown the data is collected each minute for each day so I have almost 1420 sample per day.

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Should I use the ‘time’ or the ‘date’ column in my time series analysis?
I could not find an example like my situation all dataframes I found looks like the next :

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It is all about a unique value for each day. Please any help is appreciated!

Thank you in advance!

One Answer

I will use the "date" and "time" columns to pre-process your data and to construct your neural net input.

RNN does not work well for very long-term dependancies... so, for example, creating a time series with all minutes in a month, won't probably work.

You must select:

  • How many samples your input data will have
  • What is your sampling period (minute, hour, day, week...)
  • What do you want to detect: If the input data contains an anomally or you might want to predict if an anomally will occur in the future...

When you have all of this, and perhaps something else, defined you will have to use your "date" and "time" columns to create the dataset (the time-series)

Furthermore, I don't know if all batteries are checked under the same circunstances, for instance, are all of them new stock ones? If not, you can also use those columns to compute battery age or "working time" as an extra feature.

Correct answer by ignatius on August 5, 2021

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