著者

納谷 太 高橋 悟史 宮前 雅一 寺田 努 野間 春生 鳥山 朋二 小暮 潔 西尾 章治郎 今井 倫太

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.14, no.1, pp.55-66, 2009

被引用文献数

1

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We have developed a new battery-operated sensor node based on ZigBee wireless network in order to track people's location even with a poor electrical infrastructure. For a sensor network consisting of such kind of sensor nodes, we have designed a flexible sleep control protocol which fulfills low-battery consumption as well as high-accuracy time synchronization between these nodes. We have deployed a sensor network system composed of more than 40 sensor nodes in a hospital floor for tracking more than fifteen nurses simultaneously. Experimental results show that the system can operate around 27 days using four AA size NiMH batteries and can achieve 90% accuracy in the location estimation.