High-sensitivity and high-frequency broadband receiving cylindrical array implementation method

Abstract

The invention relates to a high-sensitivity and high-frequency broadband receiving cylindrical array implementation method. The method comprises the following steps of placing a plurality of ceramic particles in a column, arranging negative electrodes at the top, arranging positive electrodes at the bottom, spacing apart the negative electrodes from the positive electrodes through arranging a decoupling layer therebetween to enable the entire length to meet the requirement on the beam width, respectively connecting the negative electrodes and the positive electrodes of all ceramic particles in the parallel manner, leading out the negative electrodes and the positive electrodes of the ceramic particles through two wires, placing all parts in a positioning box to obtain a single receiving hydrophone, pouring the watertight polyurethane into the entire single receiving hydrophone to obtain a single receiving hydrophone module, and placing eight receiving hydrophone modules on an octagonal electronic cabin to finally obtain a receiving cylindrical array. According to the technical scheme of the invention, the front and back sides of ceramic particles are attached onto a copper backing and a matched layer, so that the operating frequency band of the hydrophone is effectively expanded. Therefore, the receiving sensitivity is improved. Moreover, the thickness of the matched layer and the thickness of the copper backing are reasonably selected, so that the receiving sensitivity of the hydrophone is increased along with the increasing of the frequency. As a result, the problem that the propagation attenuation difference between different frequency components of high frequency broadband signals is large can be solved.

Description

technical field [0001] The invention belongs to the technical field of transducers, and in particular relates to a method for realizing a high-sensitivity high-frequency broadband receiving cylindrical array. Background technique [0002] With the development of signal processing technology and DSP hardware, the frequency band that the signal processor can handle is getting wider and wider, so higher bandwidth requirements are put forward for the transducer. In addition, with the development of underwater acoustic technology, high-frequency broadband transducers are more and more widely used in military and civilian fields, such as anti-frogman sonar, underwater imaging sonar, shallow sea multi-beam sonar, etc. These acoustic Nanodu requires a high-sensitivity broadband receiving matrix. [0003] The high-frequency broadband receiving matrix is ​​usually realized by piezoelectric film material PVDF or 1-3 composite material, among which the sensitivity of PVDF hydrophone is...

AI Technical Summary

Problems solved by technology

[0003] The high-frequency broadband receiving matrix is ​​usually realized by piezoelectric film material PVDF or 1-3 composite material, among which the sensitivity of PVDF hydrophone is low, generally only about -200dB, and the capacitance is small, which is easily affected by electromagnetic interference

1-3 The manufacturing process of composite materials is complicated, the electrodes are easy to fall off, and there is no technical advantage compared with ceramic particles below 300kHz

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