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Transducer based on 2-2 type piezoelectric composite material covering matching layer and preparation method thereof

A piezoelectric composite material and composite material technology are applied in the field of transducers based on 2-2 type piezoelectric composite materials covering matching layers and their preparation, and can solve problems such as difficult sensitivity and the like

Pending Publication Date: 2022-04-12
HAIYING ENTERPRISE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention is to overcome the problem in the prior art that it is difficult to broaden the bandwidth and improve the sensitivity of the high-frequency transducer by covering the matching layer.

Method used

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  • Transducer based on 2-2 type piezoelectric composite material covering matching layer and preparation method thereof
  • Transducer based on 2-2 type piezoelectric composite material covering matching layer and preparation method thereof
  • Transducer based on 2-2 type piezoelectric composite material covering matching layer and preparation method thereof

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Embodiment 1

[0023] refer to figure 2 , image 3 As shown, the present invention widens the bandwidth of the high-frequency transducer, selects different polymer phase widths for the piezoelectric material sensitive element, and makes the transducer by covering the surface of the piezoelectric composite material with a matching layer to achieve the maximum frequency bandwidth expand.

[0024] This embodiment provides a method for preparing a transducer based on a 2-2 type piezoelectric composite covering a matching layer, including

[0025] Step S1: cutting the piezoelectric phase, pouring an epoxy polymer phase on the surface of the cut piezoelectric phase and polishing it, then plating electrodes, and welding leads on the electrodes to form a 2-2 type composite material;

[0026] Step S2: Pouring a matching layer on the radiating surface of the 2-2 composite material, and pasting an acoustic backing on the non-radiating surface of the 2-2 composite material to obtain a vibrator; in th...

Embodiment 2

[0029] A vibrator with a resonant frequency close to 1MHz and a matching layer is made into a transducer. First, 25mm*2.5mm glass beads are pasted on the non-radiating surface of the vibrator as a backing, and fixed in a cylindrical metal shell with double-sided adhesive. The diameter of the metal shell is 34mm, the outer height is 50mm, and the inner height is 10mm, ensuring that the thickness of the polyurethane sound-permeable layer poured on the radiating surface is close to 4mm; the effect of the covering matching layer on the bandwidth of the transducer is studied by testing the conductance in water, sending voltage response and sensitivity response curve influences. figure 1 , Figure 4 , Figure 5 The result curve shows that when the thickness of the matching layer is selected as 0.61mm (ie 1 / 4 wavelength), the transducer's transmission voltage response -3dB achieves good coupling, its bandwidth can reach 400kHz, and the fluctuation of the transmission voltage respons...

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Abstract

The invention relates to a transducer based on a 2-2 type piezoelectric composite material covering matching layer and a preparation method of the transducer. The 2-2 type composite piezoelectric layer comprises a piezoelectric phase and an epoxy polymer phase, the matching layer is laid on the radiation surface of the piezoelectric composite layer, and the sound backing layer is laid on the non-radiation surface of the 2-2 type composite material. The thickness of the matching layer is determined in a way that the influence of the covering matching layer on the bandwidth of the transducer is researched by testing a conductivity curve of the transducer in water, so that the optimal thickness of the matching layer is determined. According to the invention, the matching layer is added on the piezoelectric composite material, so that the piezoelectric composite material generates multi-mode coupling to broaden the bandwidth of the high-frequency transducer and improve the sensitivity at the same time.

Description

technical field [0001] The invention relates to the technical field of transducers, in particular to a transducer based on a 2-2 piezoelectric composite covering a matching layer and a preparation method thereof. Background technique [0002] With the rapid development of underwater acoustic signal processing technology, it is required to obtain enough information from the transducer, that is, a transducer needs to cover a wider operating frequency, so the research on transducer broadband technology has become a general direction. Making medium and high frequency broadband transducers is one of the requirements of many sonar systems for transducers. However, for high frequency transmitting transducers, it is difficult to increase the sensitivity while broadening the bandwidth to a large extent. The bandwidth of the transducer is the basis of broadband signal processing, and the matching layer technology is the most effective way to broaden the frequency band of the thickness...

Claims

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Application Information

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IPC IPC(8): B06B1/06B29C39/10
Inventor 尹雅倩李珺杰
Owner HAIYING ENTERPRISE GROUP
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