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A matching layer of an ultrasonic transducer and its manufacturing method

A technology of an ultrasonic transducer and a manufacturing method, which is applied to sound-producing instruments, instruments, fluids utilizing vibration, etc., can solve problems such as inability to guarantee material uniformity, increase in surface roughness, and reduce matching effect, and achieve breakthrough design limitations. Effect

Active Publication Date: 2021-02-05
XIDIAN UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the thickness is close to the particle diameter, the surface roughness increases greatly, and the mixing preparation process cannot guarantee the uniformity of the material, and the matching effect is greatly reduced

Method used

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  • A matching layer of an ultrasonic transducer and its manufacturing method
  • A matching layer of an ultrasonic transducer and its manufacturing method
  • A matching layer of an ultrasonic transducer and its manufacturing method

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] The present invention will be described in further detail below in conjunction with examples and specific implementation methods.

[0024] A matching layer for an ultrasonic transducer, characterized in that it includes a low-density sound velocity layer and a high-density sound velocity layer arranged in sequence, the low-density sound velocity layer is composed of material A, the high-density sound velocity layer is composed of material B, and the low-densi...

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Abstract

The invention relates to a matching layer of an ultrasonic transducer, comprising a low-density sound velocity layer and a high-density sound velocity layer arranged in sequence, the low-density sound velocity layer is composed of material A, the high-density sound velocity layer is composed of material B, and the low-density sound velocity layer and The piezoelectric material surface electrodes are connected, and the high-density sound velocity layer is used to expose to the air or connect to other devices. In the above technical solution, the material used is a substance that can be obtained directly or indirectly in nature, and the thickness can be precisely controlled by the method of physical deposition, which overcomes the bottleneck of the traditional process in thickness grinding; through the precise control of the thickness, the present invention can obtain Matching system for precise acoustic impedance values. In addition, the present invention can also be applied to transducers of various special shapes, breaking through the limitations of traditional designs.

Description

technical field [0001] The invention relates to the field of ultrasonic transducers, in particular to a matching layer of an ultrasonic transducer and a manufacturing method thereof. Background technique [0002] As a functional device for acoustic-electric conversion, ultrasonic transducers have a wide range of applications. Due to the large acoustic impedance difference between the external medium and the piezoelectric array element of the transducer, the sound energy is reflected back and forth inside the transducer and cannot be effectively transmitted outward. In the traditional manufacturing process, the design principle of λ / 4 matching layer is often used to design and prepare the acoustic impedance matching layer to alleviate the drop gradient of the acoustic impedance, thereby improving the acoustic transmission efficiency. The traditional process mixes metal or oxide particles with high acoustic impedance and epoxy resin with low acoustic impedance to prepare the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/06B06B3/00G10K9/122G10K11/02
CPCB06B1/06B06B3/00G10K9/122G10K11/02
Inventor 费春龙刘治勇杨新宇李迪杨银堂
Owner XIDIAN UNIV
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