Selfresonance tuning piezoelectric energy harvester with broadband operation frequency

摘要

The present invention relates to a self-resonance-controlled piezoelectric energy harvester having a wide frequency range, and more particularly, to a piezoelectric beam extending in a horizontal direction; a fixing member for fixing both ends of the piezoelectric beam; and a moving mass connected to the piezoelectric beam to allow the piezoelectric beam to pass through, and to be able to move autonomously along the piezoelectric beam through a through hole having a spare space other than the space through which the piezoelectric beam passes. The displacement of the piezoelectric beam increases as it moves to the possible position of the piezoelectric beam, and as the displacement becomes larger than the free space, the moving mass is fixed at the position of the resonable piezoelectric beam. It relates to a self-resonance-controlled piezoelectric energy harvester.