Research on the Broadband Dual-Excited Underwater Acoustic Transducer

Abstract

Abstract. The performance of bandwidth and transmitting voltage response to the piezoelectric dual-excited underwater acoustic transducer are studied by FEM software ANSYS in the paper. At first, the mechanism of the dual-excited transducer is analyzed, once this is done, The FEM models with different axial dimension of the piezoelectric stack and the mid mass, Al and steel are specified for the material of mid mass respectively. the calculated curves are contrasted, the results were found that the appropriate proportion of the mid-mass to the stack will broaden the bandwidth and enhance the transmitting voltage response, the increase of the thickness of the mid-mass will reduce the transmitting voltage response, and the bandwidth can be expanded to 13kHz, the resonance frequency has shifted to a higher value, it ranges from 34kHz to 46kHz. The results show that one octave bandwidth could be achieved and provide support for the next production and experiment of the broadband underwater acoustic transducer.

Research on the Application Status of Giant Magnetostrictive Material in Drive Field

“…Electrical mechanical converter is the key part of the fluid control valve parts. Due to the excellent characteristic of giant magnetostrictive material such as quick response, large output force, and being able to work in low magnetic field strength etc., using a giant magnetostrictive material converter will greatly improve the performance of control valve [10]. At present, the magnetostrictive electric (magnetic)-mechanical energy converter is more used in fuel injection system, micro pump and valve products.…”

“…In the domestic, The Chinese Academy of Sciences Institute of acoustics and Department of iron and Steel Research Institute of metallurgy used domestic magnetostrictive alloy developed high-power low-frequency sonar [10]. The seven one five research institute studied polygon underwater acoustic transducer.…”

Study on the Wideband Tonpilz Transducer with a Cavity-Type Head Mass

“…[3][4][5] 또한 하나의 Tonpilz 트랜스듀서에 2개 이상의 전면추를 장착하여 부가적인 공진모드를 발생시켜 대역폭을 넓히는 방안도 제안되었다. [6,7] 그 외에도 구동자의 종방향 모드와 전면추의 가장자리 부분이 휘는 flapping 모드를 결합하는 방안 등 대역폭을 넓 Drive section 1-3 piezoelectric composite [12] 히기 위한 다양한 방법들이 연구되었다.…”

Design of a Wideband Tonpilz Transducer Comprising Non-Uniform Piezoceramic Stacks with Equivalent Circuits

“…Rodrigo proposed a wideband transducer design that installs three compliant rods and an additional head mass to combine two resonant modes [ 8 ]. Butler [ 9 ] and Zhang et al [ 10 ] both proposed multi-resonance structures with additional head masses and compliant layers. Saijyou and Okuyama proposed installing a bending piezoelectric disk in the head mass to widen the bandwidth [ 11 ].…”