NDLI: Creating a room connectivity graph of a building from per-room sensor units

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Creating a room connectivity graph of a building from per-room sensor units

Content Provider	ACM Digital Library
Author	Ellis, Carl Scott, James Hazas, Mike Constandache, Ionut
Abstract	Sensor and actuator networks are often installed in buildings for energy-related applications such as lighting and climate control. Such systems require metadata about the deployed hardware (e.g. which room each is in, what the function of each room is) in order to operate effectively. In this paper we present methods to automatically determine such metadata, in particular the room connectivity graph (i.e., which rooms share a doorway/interior window). Crucially, our method works with just one sensor unit per room, does not require special placement of any of the sensors, and can therefore work on data from existing widely-deployed applications (such as burglar alarms). We apply this method to a 30-day data set from single per-room sensor units deployed in two residential homes in the United Kingdom. Room connectivity is determined based on: spillover of artificial light between rooms; occupancy detections due to movement between rooms; and a fusion of the two. The fusion of both techniques is shown to work better than either technique alone, with a 93% true positive rate and 0.5% false positive rate (aggregate across both houses), and a convergence time of under a week.
Starting Page	177
Ending Page	183
Page Count	7
File Format	PDF
ISBN	9781450311700
DOI	10.1145/2422531.2422563
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-11-06
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Motion Algorithms Light Sensors Auto-calibration
Content Type	Text
Resource Type	Article

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