ENERGY HARVESTER AND WIRELESS SENSOR DEVICE INCLUDING THE SAME

摘要

An energy harvester according to the present invention converts a vibration generated from an excitation source into electricity. The energy harvester includes: a first elastic part which is designed to vibrate by reacting to the vibration with a first vibration frequency as a center frequency; a first mass part which is combined to the first elastic part; a first magnetic element which is combined to the first mass part; a second elastic part which is designed to vibrate by reacting to the vibration with a second vibration frequency as the center frequency; a second mass part which is combined to the second elastic part; a second magnetic element which is combined to the second mass part; a central shaft which is combined to the first elastic part, the second elastic part, the first mass part, the second mass part, the first magnetic element, and the second magnetic element; a third elastic part which is combined between the first mass part and the second mass part; and a coil part which is arranged along the central shaft and to which the first magnetic element or the second magnetic element is inputted according to the vibration of the first elastic part or the second elastic part.