Accurate & Easy-to-Deploy In-Home Energy Sensing

Transcription

1 Accurate & Easy-to-Deploy In-Home Energy Sensing Jon Froehlich 1, Sidhant Gupta 1, Eric Larson 2, Gabe Cohn 2, Kate Everitt 1 Professors James Fogarty 1, James Landay 1, Shwetak N. Patel 1,2 1 Computer Science and Engineering 2 Electrical Engineering design: use: build: university of washington ubicomp lab university of washington sustainability research

2 mpg?

3

4

5

6

7 how much energy does your dryer use?

8 why the disconnect?

9

10

11

12 what about in-home ecofeedback displays?

13

14 Kempton and Layne, 1994

15 high resolution resource consumption sensing for electricity, water and gas electrisense hydrosense gassense ubicomp lab sustainability research

16 three design goals low-cost easy-to-install device-level information

17 device-level information sometimes called disaggregated or disambiguated data information down to the source of consumption or or or

18 how much energy does your dryer use? + = appliance sensor appliance- level data!

19 distributed direct sensing overhead lighting coffee maker refrigerator microwave stove convection oven

20 infrastructure distributed direct mediated sensing overhead lighting coffee maker refrigerator microwave stove convection oven Patel et al., UbiComp 2007

21 electrisense: appliance level sensing with two sensors powerline event detection sensor contactless power consumption sensor automatically detects and classifies electrical events on the home powerline Patel et al., UbiComp 2007 whole-home power consumption sensing from outside breaker panel Patel et al., To Appear

22 demo my colleague, sidhant, will walk around using various electrical switches/appliances currently detected event list of recently activated events graph of power consumption over time total power being consumed in real-time not for end users

23 demo

24 movie removed for public posting of slide deck

25 how does this work?

26 electrisense: appliance level sensing with two sensors powerline event detection sensor contactless power consumption sensor automatically detects and classifies electrical events on the home powerline Patel et al., UbiComp 2007 whole-home power consumption sensing from outside breaker panel Patel et al., To Appear

27 requirement: we need real-time power consumption data

28 installing the energy detective (ted) Circuit Breaker Box Serious injury/death could occur if you re not familiar with electrical CTs components and the operation of the circuit breaker panel TED website

29 installing contactless power consumption sensor or installs on the outside of the circuit breaker box

30 how contactless power consumption sensing works calculate current flow based on the magnetic field generated by the two electrical feeds in the breaker box use a magnetoresistive sensor to measure magnetic field, which radiates a few centimeters outward, even through sheet metal

31 electrisense: appliance level sensing with two sensors powerline event detection sensor contactless power consumption sensor automatically detects and classifies electrical events on the home powerline Patel et al., UbiComp 2007 whole-home power consumption sensing from outside breaker panel Patel et al., To Appear

32 installing power line event detection (ped) our prototype unit listens for noise on powerline and monitors line voltage programmable hardware for fourier analysis and feature extraction

33

34 PowerMeter power consumption spikes and temporal patterns correlate to usage this is only one input feature into our machine learning algorithm!

35 your noise is our signal

36 how ped works mechanical switches Off R electrical noise transient

37 how ped works mechanical switches Off R electrical noise transient

38 each switch has a unique transient signature on off on off based on: 1. switching mechanisms 2. load characteristics 3. position on transmission line switch 1 switch 2

39 transmission line shapes signal allows us to identify identical devices, which are in different locations in the home

40 signal is stable over time Off day 1 day 2 day 7 switch 1

41 movie removed for public posting of slide deck

42 how ped works three classes of noise generates continuous noise resistive inductive loads (e.g., from motors) loads with solid state switching (e.g., tvs, cfls, computers)

43 transients

44 transients continuous noise fan resonant noise frequency tv resonant noise frequency

45 fan resonant noise frequency tv resonant noise frequency

46 movie removed for public posting of slide deck

47 calibration: 3 approaches

48 1. the early adopters

49 2. unsupervised learning event category 1 event category 1 event category 3 event category 4

50 2. unsupervised learning air conditioning television events hot water heater lighting events

51 calibration 3. the cloud

52 Infrastructure-Mediated Single-Point Sensing of Whole-Home Water Activity Jon Froehlich 1, Eric Larson 2, Tim Campbell 3, Conor Haggerty 4, James Fogarty 1, Shwetak N. Patel 1,2 1 Computer Science & Engineering, 2 Electrical Engineering, 3 Mechanical Engineering, 4 Community, Environment, and Planning

53 water scarcity

54 hydrosense single-point pressurebased sensor of water usage identifies water usage activity down to its source(e.g., toilet) provides estimates of flow at each fixture

55 pressure waves hydrosense: pressure- based sensor toilet kitchen sink shower

56 closed pressure system

57 typical water meters - only provide aggregate information on water usage - require pipe modification for installation traditional inline water meter

58 movie removed for public posting of slide deck

59 raw bathroom sink signal open valve close valve stabilized pressure drop time (t)

60 shower faucet toilet example open events home 1 home 2 home 3 signature dependent on: - fixture type - fixture location in home

61 GasSense: Appliance-Level, Single-Point Sensing of Gas Activity in the Home Gabe Cohn 1, Sidhant Gupta 2, Jon Froehlich 2, Eric Larson 1, Shwetak Patel 1,2 1 Electrical Engineering, 2 Computer Science and Engineering

62 gassense installs on outside of gas regulator

63 the gassense signal the intensity of this audio signal and its rate of change indicate fixture and directly correlates to flow

64 how gassense works a gas event instrumented regulator Filter Ambient Noise and Extract Hissing data cleansing extract signal ML Algorithms classify event

65 example data

66 using the stove

67 enable new kinds of consumption feedback

68 redesign bills

69 redesigned websites

70 ubigreen home energy table Everitt, Kam, Landay

71

72 disaggregated feedback study

73 advanced home resource consumption sensing electrisense hydrosense gassense low-cost ubicomp lab easy-to-install device-level information sustainability research

74 students faculty Thank You! Jon Froehlich Gabe Cohn Sidhant Gupta Eric Larson Tim Campbell Kate Everitt Marilyn Ostergren Shwetak Patel James Fogarty James Landay design: use: build: university of washington ubicomp lab university of washington sustainability research

75 students faculty Thank You! Jon Froehlich Gabe Cohn Sidhant Gupta Eric Larson Tim Campbell Kate Everitt Marilyn Ostergren Shwetak Patel James Fogarty James Landay design: use: build: university of washington ubicomp lab university of washington sustainability research

76 Thank You! faculty students Jon Froehlich Gabe Cohn design: use: build: university of washington Sidhant Gupta Eric Larson Tim Campbell Kate Everitt Marilyn Ostergren Shwetak Patel James Fogarty James Landay ubicomp lab university of washington sustainability research