School of Mechanical Engineering, Kyungpook National University, Daegu 41566, Korea.
Sensors (Basel). 2022 Sep 1;22(17):6614. doi: 10.3390/s22176614.
Cymbal transducers are typically grouped and arranged in planar arrays. For projector arrays, a wide bandwidth on the transmitting voltage response (TVR) spectrum is required for better underwater communication and data transmission within a short time. The purpose of this study is to develop a wideband cymbal array by controlling the center-to-center (CTC) spacing between the cymbal transducers in the array. In the practical design of the array, due to the arrangement of elements in one layer, the minimum CTC spacing between the cymbals is constrained to the diameter of the cymbals in use. To overcome this limitation, we propose a new dual-layer array structure. Finite element analysis of the cymbal array showed that the bandwidth was generally inversely proportional to the CTC spacing. We explained the mechanism of this relationship using a theoretical analysis of the mutual radiation impedance between the cymbals in the array. Subsequently, we identified the optimum CTC spacing to achieve the widest possible bandwidth for the cymbal array. The validity of the wideband array design was verified through the fabrication and characterization of prototype arrays. We confirmed that the two-layered arrangement could significantly widen the bandwidth of the cymbal array while maintaining the TVR above a specified level.
音叉换能器通常以平面阵列的形式分组和排列。对于投影仪阵列，需要在发射电压响应（TVR）频谱上具有较宽的带宽，以便在短时间内实现更好的水下通信和数据传输。本研究的目的是通过控制阵列中音叉换能器之间的中心到中心（CTC）间距来开发宽带音叉阵列。在阵列的实际设计中，由于一层中元素的排列，音叉之间的最小 CTC 间距受到所用音叉直径的限制。为了克服这一限制，我们提出了一种新的双层阵列结构。对音叉阵列的有限元分析表明，带宽通常与 CTC 间距成反比。我们使用对阵列中音叉之间互辐射阻抗的理论分析来解释这种关系的机制。随后，我们确定了实现音叉阵列尽可能宽的带宽的最佳 CTC 间距。通过制造和表征原型阵列验证了宽带阵列设计的有效性。我们证实，双层排列可以在保持 TVR 高于指定水平的同时，显著拓宽音叉阵列的带宽。
