Presence detection under optimum fusion in an ultrasonic sensor system

S. Srinivasan, A. Pandharipande

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Reliable presence detection is a requirement in energy-efficient occupancy-adaptive indoor lighting systems. A system of multiple ultrasonic sensors is considered for presence detection, and the performance gain from optimum fusion is studied. Two cases are considered wherein an individual sensor determines presence based on (i) local detection by processing echoes at its receiver, and (ii) the optimum Chair–Varshney fusion rule using multiple sensor detection results. The performance gains of using optimum fusion over local detection are characterized under different sensor system configurations and it is shown that improved detection sensitivity is obtained over a larger detection coverage region.
Original languageEnglish
Pages (from-to)EL348-EL353
Number of pages6
JournalJournal of the Acoustical Society of America
Issue number4
Publication statusPublished - 2012
Externally publishedYes


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