Lu Wei, Guo Rongzhen, Lan Yu, Sun Hao, Li Shichang, Zhou Tianfang
Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China.
Key Laboratory of Marine Information Acquisition and Security (Harbin Engineering University), Ministry of Industry and Information Technology, Harbin 150001, China.
Sensors (Basel). 2019 Jul 19;19(14):3192. doi: 10.3390/s19143192.
This paper realizes an underwater spiral wave sound source by using three omni-directional spherical transducers with three different phases. The pressure distribution of the sound field for a phased array is derived using the superposition theory of sound field. The generation of spiral wave field is presented, the relationship between the performance of phased array sound field and the array parameters is analyzed, and also verified by the finite element method (FEM). A spiral wave sound source with three spherical piezoelectric ceramic transducers is then designed and fabricated based on FEM simulation, and the performance of the sound source is analyzed. Measurements are made in a reverberation pool, and the result shows that the fabricated spiral wave sound source is capable of producing a spiral sound wave. Under a frequency of 3.5 kHz, the phase directivity has a fluctuation of ±21°, and the amplitude directivity range is 4.3 dB, which verifies the realization of the spiral wave sound source.
本文利用三个具有不同相位的全向球形换能器实现了一种水下螺旋波声源。利用声场叠加理论推导了相控阵声场的压力分布。阐述了螺旋波场的产生，分析了相控阵声场性能与阵列参数之间的关系，并通过有限元方法（FEM）进行了验证。然后基于有限元模拟设计并制作了一种由三个球形压电陶瓷换能器组成的螺旋波声源，并对声源性能进行了分析。在混响池中进行了测量，结果表明所制作的螺旋波声源能够产生螺旋声波。在3.5kHz频率下，相位指向性波动为±21°，幅度指向性范围为4.3dB，验证了螺旋波声源的实现。
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