The piezoelectric helical spring is analyzed for use as a hydrophone. Because the polarity in the helix is arranged parallel to the electrode planes, the shear mode, g/sub 15/ can perform the elastoelectric conversion without any undesired couplings under hydrostatic condition. In this paper, the structural effects are modeled using the concept of stress amplifier. The gain factor, G, is defined as the ratio of the average stress in the piezoceramic to the detected pressure and, therefore, provides a G-fold increase in voltage responsivity. In addition, a solution for increasing the capacitance while maintaining the sensitivity is proposed. Numerical results showing high hydrostatic responsivities are given.
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机译：分析了压电螺旋弹簧以用作水听器。由于螺旋中的极性平行于电极平面排列，因此剪切模式g / sub 15 /可以在静水压条件下进行弹性转换，而不会发生任何不希望的耦合。在本文中，结构效应是使用应力放大器的概念建模的。增益因子G定义为压电陶瓷中的平均应力与检测到的压力之比，因此，电压响应性提高了G倍。另外，提出了一种在保持灵敏度的同时增加电容的解决方案。数值结果表明了高静水压响应性。
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