ENERGY HARVESTER AND WIRELESS SENSOR DEVICE INCLUDING THE SAME

摘要

The energy harvester converting the vibration generated from the excitation source according to the present invention into electricity includes a first elastic portion designed to vibrate in response to a vibration having a center frequency of the first oscillation frequency, A first magnetic body coupled to the first mass portion, a second elastic portion designed to vibrate in response to a vibration having a second vibration frequency as a center frequency, a second mass portion coupled to the second elastic portion, A second magnetic body coupled to the second mass portion, a central shaft to which the first elastic portion, the second elastic portion, the first mass portion, the second mass portion, the first magnetic body and the second magnetic body are coupled, And a coil portion disposed along the central axis and configured such that the first magnetic body or the second magnetic body is respectively drawn in accordance with the vibration of the first elastic portion or the second elastic portion, do.