Abstract
A wide-band cylindrical transducer was developed by using the wide band of the composite material and the matched matching layer for multimode coupling. Firstly, the structure size of the transducer’s sensitive component was designed by using ANSYS simulation software. Secondly, the piezoelectric composite ring-shaped sensitive component was fabricated by the piezoelectric composite curved-surface forming process, and the matching layer was coated on the periphery of the ring-shaped piezoelectric composite material. Finally, it was encapsulated and the electrodes were drawn out to make a high-frequency broadband horizontal omnidirectional water acoustic transducer prototype. After testing, the working frequency range of the transducer was 230–380 kHz, and the maximum transmission voltage response was 168 dB in the water.
Highlights
Sonar is an electronic system that detects and identifies underwater objects by means of acoustic waves
The structure of of thethe high-frequency composite cylindrical transducer. It consists of piezoelectric composite material, matching layer, hard foam backing, waterproof
The process of curved-surface forming was rather complicated, so in During the fabrication of sensitive component transducer, it was necessary pay attention to the cleaning of the mold to ensure that there wasand no impurity in the filling material to to affect the to theperformance cleaning ofofthe to ensure that there was no impurity in the material to affect themold transducer
Summary
Sonar is an electronic system that detects and identifies underwater objects by means of acoustic waves. Zhang Kai and others fabricated a dual matching layer high-frequency broadband transducer with a working range of 43–155 kHz. the above-mentioned transducer had expanded bandwidth, its beam angle was small, so it was difficult to realize the transmitting or receiving of large-angle underwater acoustic signals [1,2,3]. Piezoelectric material, PZT piezoelectric ceramics can be prepared into a desired shape by adding a flexible polymer This soft nature makes it more resistant to vibration and mechanical shock, which can increase the service life of the transducer in a complex seawater environment. It was found that the composite material has a lower mechanical quality factor than the pure piezoelectric ceramic material, which is advantageous for expanding the bandwidth of the transducer [15]. The design theory and fabrication process will greatly promote the study of the extended bandwidth and the beam angle of the high-frequency transducer
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