| 摘要 |
An example embodiment of an energy harvesting device (20) comprising a piezoelectric element (30) provides two degrees of vibration freedom for the piezoelectric element and magnetic soft impact, thereby enhancing power output of the piezoelectric element. The example embodiment of an energy harvesting device (20) comprises a frame (22); a body (28) configured to oscillate with respect to the frame upon vibration of the frame; a piezoelectric member (30); and, at least one frame magnet (32) mounted on the frame (22) and at least one body magnet (34) mounted on the body (28). The piezoelectric element (30) is connected to the body and configured to undergo deflection upon oscillation of the body (28), and upon the deflection to generate an electrical voltage. The frame magnet (32) and the body magnet (34) are of opposite polarity with one another and positioned to create a repulsive force between the frame (22) and the body (28).
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