ENERGY HARVESTER AND WIRELESS SENSOR DEVICE INCLUDING SAME

摘要

An energy harvester, according to the present invention, comprises: a first elastic part designed to vibrate by responding to a vibration having a first oscillation frequency as a center frequency; a first weight coupled to the first elastic part; a first magnetic substance coupled to the first weight; a second elastic part designed to vibrate by responding to a vibration having a second oscillation frequency as a center frequency; a second weight coupled to the second elastic part; a second magnetic substance coupled to the second weight; a central shaft having the first elastic part, the second elastic part, the first weight, the second weight, the first magnetic substance, and the second magnetic substance coupled thereto; a third elastic part coupled between the first weight and the second weight and a coil arranged along the central shaft and formed such that the first magnetic substance and the second magnetic substance are respectively inserted thereinto according to the vibration of the first elastic part or the second elastic part.