Qiao Yali, Jin Shaojia, Zhong Chao, Qin Lei
Beijing Key Laboratory for Sensor, Beijing Information Science & Technology University, Beijing 100192, China.
Beijing Key Laboratory for Optoelectronic Measurement Technology, Beijing Information Science & Technology University, Beijing 100192, China.
Micromachines (Basel). 2022 Aug 15;13(8):1320. doi: 10.3390/mi13081320.
In this study, a new kind of underwater transducer was developed using the d15 shear vibration mode of piezoelectric ceramic and a trapezoid transition layer. A series of finite element simulations were conducted to investigate how the boundary conditions of piezoelectric ceramic blocks affect the shear vibration. Finite element simulation was also used to investigate how the trapezoid transition layer transfers shear vibrations into longitudinal vibrations. A prototype of the proposed transducer was fabricated from piezoelectric vibrators working in the shear mode and a trapezoid transition layer. The underwater performance of this transducer was then tested. The results demonstrated that the transmitting voltage response, working frequency range, and bandwidth reached 163 dB (62 kHz), 37 kHz-68 kHz, and 31 kHz when the radiating area of the transducer was 120 mm × 240 mm. The transmitting voltage response caused by the d15 shear vibration mode reached 160.9 dB at 89 kHz.
在本研究中，利用压电陶瓷的d15剪切振动模式和梯形过渡层开发了一种新型水下换能器。进行了一系列有限元模拟，以研究压电陶瓷块的边界条件如何影响剪切振动。有限元模拟还用于研究梯形过渡层如何将剪切振动转换为纵向振动。所提出的换能器的原型由工作在剪切模式的压电振动器和梯形过渡层制成。然后测试了该换能器的水下性能。结果表明，当换能器的辐射面积为120 mm×240 mm时，发射电压响应、工作频率范围和带宽分别达到163 dB（62 kHz）、37 kHz - 68 kHz和31 kHz。由d15剪切振动模式引起的发射电压响应在89 kHz时达到160.9 dB。
