Development of passive wireless sensor powered by vibration generator for safety surveillance of social infractructure

2014 Fiscal Year Final Research Report

• Project/Area Number: 24310117
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Social systems engineering/Safety system
• Research Institution: Hokkaido University
• Principal Investigator: IGARASHI Hajime 北海道大学, 情報科学研究科, 教授 (90212737)
• Co-Investigator(Kenkyū-buntansha): WATANABE Kota 室蘭工業大学, 工学(系)研究科(研究院), 准教授 (20322828) ; IKEBE Masayuki 北海道大学, 大学院情報科学研究科, 准教授 (20374613) ; MOTOHISA Junichi 北海道大学, 大学院情報科学研究科, 教授 (60212263)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 振動発電 / エネルギーハーベスティング / 環境発電 / 無線センサ / RFID

Outline of Final Research Achievements

Batteryless wireless sensors are very effective for safety surveillance of infrastructures such as bridges, tunnels and steel towers of the power-transmission lines. In this study, vibration generators which power the wireless sensors have been developed. These vibration generators, which harvest energy from minute vibration of the structures, allow us to realize autonomous operation of the wireless sensors.
Although the structures usually have wide vibration spectra, the conventional vibration generators, which have linear vibration modes, cannot harvest sufficient energy at nonresonant frequencies. In this study, it has been found that it is possible to generate chaotic vibration by introducing new design to the vibration generator and this leads to energy harvesting in wider vibration spectra.

Free Research Field

社会システム工学・安全システム