| 摘要 |
<p>Disposed within a float on the surface of a body of water is a vertically suspended, resilient piezoelectric element (32) provided with a preselected strain by a hanging weight (34). The piezoelectric system functions as a weighted coiled spring which is driven into oscillation in response to movements of the float in response to passing surface waves. Preferably, the natural frequency of the system is selected in correspondence with the frequency of the passing waves for causing the system to oscillate in resonance with the passing waves. Additionally, a mechanism (54) is provided for automatically adjusting the natural frequency of the system in response to changing wave conditions for maintaining the system in resonance with the waves.</p> |
