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  1. #1
    Registered User
    Join Date
    Feb 2009
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    1

    Energy Profiler: Extrapolating energy from power measurements

    I am using the energy profiler to measure energy consumed while executing a python script. The energy measurements provided by the profiler seems to be in mAh. I wanted to measure energy consumed in Watt hours and also in finer granularity. I was wondering if I could use the instantaneous power measurements given by the profiler and compute the energy consumed as the area under the power curve. I am not sure if it is fair to assume that the 0.25 second interval is adequate enough for computing energy consumed accurately.

    Any thoughts/suggestions ?


    Thanks
    ~ Niranjan.

  2. #2
    Nokia Developer Expert
    Join Date
    Jan 2009
    Posts
    69

    Re: Energy Profiler: Extrapolating energy from power measurements

    I was wondering if I could use the instantaneous power measurements given by the profiler and compute the energy consumed as the area under the power curve. I am not sure if it is fair to assume that the 0.25 second interval is adequate enough for computing energy consumed accurately.
    Yes, this is how you should do it.

    0.25s interval is accurate for active apps that consume >100mA (>0.37W). In standby, the measurement gets overhead from fast measurements and you should use 5s interval. Do read Options>Help for details and check out the NEP webinar slideset.

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