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Blurry Moon (sun@shitposter.world)'s status on Thursday, 04-Dec-2025 16:22:47 JST Blurry Moon
in reply to
- Jonah Aragon :MN:
- feld
@feld @jonah this: https://en.wikipedia.org/wiki/Nonintrusive_load_monitoring
In conversation about 6 months ago from gnusocial.jp permalink
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  Nonintrusive load monitoring
  
  Nonintrusive load monitoring (NILM), nonintrusive appliance load monitoring (NIALM), or energy disaggregation is a process for analyzing changes in the voltage and current going into a house and deducing what appliances are used in the house as well as their individual energy consumption. Electric meters with NILM technology are used by utility companies to survey the specific uses of electric power in different homes. NILM is considered a low-cost alternative to attaching individual monitors on each appliance. It does, however, present privacy concerns. Background and theory Nonintrusive load monitoring was invented by George W. Hart, Ed Kern and Fred Schweppe of MIT in the early 1980s with funding from the Electric Power Research Institute. The basic process is described in U.S. patent 4,858,141. As shown in figure 1 from the patent, a digital AC monitor is attached to the single-phase power going into a residence. Changes in the voltage and current are measured (i.e. admittance measurement unit), normalized (scaler) and recorded (net change detector unit). A cluster...
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  feld (feld@friedcheese.us)'s status on Thursday, 04-Dec-2025 16:22:48 JST feld
  in reply to
  - Jonah Aragon :MN:
  @jonah they can make some guesses by studying your usage patterns and known common amperage draw of various things. Like your living habits are pretty clear by studying your electricity or water usage over time. Kinda scary really.
  
  I'd say it has a chance of having a little truth to it anyway.
  
  In conversation about 6 months ago permalink
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  Jonah Aragon :MN: (jonah@mastodon.neat.computer)'s status on Thursday, 04-Dec-2025 16:22:49 JST Jonah Aragon :MN:
  
  Can my electric company possibly know this, or are these nonsense numbers? 🤔
  In conversation about 6 months ago permalink
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  1. You spend 50% of your electric bill on Consumer Electronics.
    https://mastodon-cdn.neat.computer/media_attachments/files/115/659/829/279/934/804/original/c5b0a971c04bf8e9.png

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