| 摘要 |
<p>Laminates of polyvinylidene fluoride (PVDF) are employed as piezoelectric sensors and actuators which can sense and/or generate complex motions that include bending, stretching and twisting components. The laminates can be attached directly to a mechanical structure whose motions are to be sensed and/or controlled. By skewing the principal axes of each of the lamina (52, 54, 56) in the laminate (50) with respect to one another, the laminate (50) is responsive not only to bending motions, but to torsional motions a well. Surface electrodes (58) are disposed on the top and bottom sides of each of the lamina (50, 54, 56) to either sense voltage generated by the lamina (52, 54, 56) on supply voltage to the lamina to induce motion therein. The shape of the surface of electrode patterns (58) can be varied to control the particular components of motion to which each of the lamina (52, 54, 56) is responsive (e.g., bending modes). The polarization profile in each of the lamina can also be varied for this purpose. Mechanical oscillators and dampers can be constructed using the laminates.</p> |
