Factors affecting the performance of ceiling-based PIR occupancy sensors in offices

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TypeArticle
Proceedings titleProceedings of the Illuminating Engineering Society of North America (IESNA) Annual Conference
ConferenceIlluminating Engineering Society of North America (IESNA) Annual Conference, November 8th-10th, 2015, Indianapolis, USA
AbstractAs part of a larger project on occupancy sensing, we collected 5 Hz occupancy detection data (aggregated to the 15-second level) from a commercially-available ceiling-based PIR sensor. Identical sensors were deployed in 28 offices for up to a month per office. Ground truth data were collected simultaneously using a pressure-sensitive floor mat. We evaluated the accuracy (overall, as well as false positives and false negatives) and energy-saving potential in each office with various timeout periods applied post-hoc. The data revealed relatively poor overall detection performance at the 15-second level. Adding a timeout period of 20 minutes produced reasonable false negative performance for the top quartile of offices, but reduced potential energy savings to 65% of the unoccupied time. The results support efforts to improve occupancy sensing in order to garner greater energy savings.
Publication date
LanguageEnglish
AffiliationConstruction; Aerospace; National Research Council Canada
Peer reviewedYes
NPARC number21277092
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Record identifier1e9c0cba-32c2-445e-96f1-609dc39b9b9c
Record created2015-11-24
Record modified2017-04-05
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