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
5 Cites 0 Cited by

AI-Extracted Technical Summary

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 ...
View more

Method used

With reference to Fig. 2, shown in Fig. 3, the present invention is to broaden the bandwidth of high-frequency transducer, for piezoelectric material sensitive element, selects diffe...
View more

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.

Application Domain

Mechanical vibrations separation

Technology Topic

Composite materialPiezoelectric composite +4

Image

  • 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

Examples

  • Experimental program(2)

Example Embodiment

[0022] Example one
[0023] Refer figure 2 , image 3 As shown, the present invention is a bandwidth that broaden the high-frequency substantial, and selects a different polymer to be widely width for the piezoelectric material sensitive element, and the surface of the piezoelectric composite surface is formed, and the maximum frequency bandwidth is achieved. Expand.
[0024] This embodiment provides a method of preparing a transducer based on a 2-2 piezoelectric composite covering matching layer, including
[0025] Step S1: Cut the piezoelectric phase, pouring the epoxy polymer phase surface with the cutting piezoelectric phase surface and polished, plated on the electrode, welding leads on the electrode to form a 2-2 composite material;
[0026] Step S2: The matching layer is perfused on the 2-2 composite radiant surface, and the sound back liner is pasted on the non-radiating surface of the 2-2 composite material to obtain a vibrator; in the present embodiment, the backing is 25mm * 2.5mm. Glass microbead material;
[0027] Step S3: Mount the vibrator into the housing, perfuse the waterproof radiograph layer in the outer casing and access the cable to obtain the transducer, and the voltage response and sensitivity response curve are used to study the cover matching layer pair of transducer bandwidth The effect; in this example, the outer casing is a cylindrical metal casing having a diameter of 34 mm, an outer height 50 mm, a height 10 mm, and ensures that the polyurethane sound synthesion of the perfused on the radiant surface is close to 4 mm.

Example Embodiment

[0028] Example 2
[0029] The resonant frequency is close to the oscillator of the 1 MHz strip layer into a transducer. First, the glass microbeads of 25 mm * 2.5 mm are pasted in the non-radiating surface of the vibrator as the backing, and the cylindrical shape is fixed to the cylindrical metal housing by double-sided adhesive. The metal casing has a diameter of 34mm, the outer height is 50mm, and the internal height is 10mm, ensuring that the thickness of the polyurethane sound layer on the radiant surface is close to 4 mm; the transmission voltage response and sensitivity response curve are studied to cover the transducer bandwidth. Influence. figure 1 , Figure 4 , Figure 5 The result curve indicates that the transmission voltage response -3db of the transducer is achieved when the matching layer thickness is selected, and the bandwidth can reach 400 kHz. The transmission voltage in the frequency band is less than 3 dB. This concluded that the thickness of the matching layer was optimally selected. In fact, the present invention can achieve good results when the thickness of the matching layer is 1/4 wavelength ± 0.01 mm.

PUM

PropertyMeasurementUnit
Thickness4.0mm
Thickness1.0 ~ 4.01mm

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products