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전력계통 구조물의 상태진단용 자가발전 무선 센서 노드 개발 및 평가
김창일 ( Chang Il Kim ),정영훈 ( Young-hun Jeong ),윤지선 ( Ji Sun Yun ),홍연우 ( Youn Woo Hong ),장용호 ( Yong-ho Jang ),최범진 ( Beom-jin Choi ),박신서 ( Shin-seo Park ),손천명 ( Chun Myung Son ),서덕기 ( Duck Ki Seo ),백종후 ( 한국센서학회 2016 센서학회지 Vol.25 No.5
A self-powered piezoelectric energy harvester was developed for the application in wireless sensor node. The energy harvester was evaluated with power generation characteristics for the wireless sensor node for structural diagnosis of the electric power system. The self-powered wireless sensor node was set to measure temperature, vibration frequency of the electric power system. A piezoelectric harvester composed of 7 uni-morph cantilevers (functionalized as 6 generators and 1 vibration sensor) was connected to be an array and revealed to produce significantly high output power of approximately 10 mW at 120 Hz under 3.4 g((1 g = 9.8 m/sec²). The wireless sensor node could work as the electric power generated by the developed piezoelectric harvester.