Sandwich type radial direction vibrating piezoelectric ceramic ultrasonic transducer

An ultrasonic transducer, radial vibration technology, applied in the generation or transmission of acoustic or ultrasonic mechanical vibration, sub-acoustic frequency field, can solve the problem that piezoelectric ceramic transducers are difficult to achieve radiation power and radiation intensity, limited tensile strength , difficult to meet, etc.

Inactive Publication Date: 2008-01-23
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited tensile strength of the piezoelectric ceramic material itself, it is difficult for a single radial vibration piezoelectric ceramic transducer (round tube or ring, etc.) to achieve a certain radiation power and radiation intensity, so it is also difficult to meet some large The needs of power acoustics applications, such as underwater high-power omnidirectional sound sources for underwater acoustics research and high-power ultrasonic sources for various ultrasonic treatments in liquids, etc.

Method used

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  • Sandwich type radial direction vibrating piezoelectric ceramic ultrasonic transducer
  • Sandwich type radial direction vibrating piezoelectric ceramic ultrasonic transducer
  • Sandwich type radial direction vibrating piezoelectric ceramic ultrasonic transducer

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Taking the resonant frequency of the prepared transducer as 65171Hz as an example, the geometric shape and connection relationship of each component are as follows:

[0039] In FIGS. 1 and 2 , the sandwich type radial vibration piezoelectric ceramic ultrasonic transducer of this embodiment is composed of a metal outer ring 1 , a piezoelectric ceramic ring 2 and a metal inner ring 3 .

[0040] The outer surface of the metal inner ring 3 is bonded to the piezoelectric ceramic ring 2 with a high-temperature resistant epoxy resin adhesive, and the outer surface of the piezoelectric ceramic ring 2 is bonded to the inner surface of the metal outer ring 1 with a high-temperature resistant epoxy resin adhesive. bonding. The high temperature-resistant epoxy resin adhesive of this embodiment adopts Shenliling super glue, and can also use Swiss Araldite universal super glue or Dutch "bison" epoxy resin metal super glue or universal super glue, piezoelectric Ceramic ring 2, metal ...

Embodiment 2

[0045] Taking the resonant frequency of the prepared transducer as 55625Hz as an example, the geometric shape and connection relationship of each component are as follows:

[0046] In this example, the inner radius R1 of the metal inner ring 3 is 5mm, the outer radius R2 is 10mm, the inner radius R3 of the metal outer ring 1 is 15mm, the outer radius R4 is 25mm, and the height H is 5mm, and the inner radius R2 of the piezoelectric ceramic ring 2 is 10mm, and the outer radius R3 is 15mm.

[0047] The metal inner ring 3 and the metal outer ring 1 are steel rings in the shape of circular rings, and the piezoelectric ceramic ring 2 is made of lead zirconate titanate, and its material parameters are the same as those in Example 1.

[0048] According to formulas (1)-(10), the resonance frequency of this embodiment is calculated to be 55625 Hz. The coupling relationship of the parts is the same as that of Embodiment 1.

Embodiment 3

[0050] Taking the resonant frequency of the prepared transducer as 48603Hz as an example, the geometric shape and connection relationship of each component are as follows:

[0051] In this example, the inner radius R1 of the metal inner ring 3 is 5mm, the outer radius R2 is 10mm, the inner radius R3 of the metal outer ring 1 is 15mm, the outer radius R4 is 30mm, and the height H is 5mm, and the inner radius R2 of the piezoelectric ceramic ring 2 is 10mm, and the outer radius R3 is 15mm.

[0052] The metal inner ring 3 and the metal outer ring 1 are steel rings in the shape of circular rings, and the piezoelectric ceramic ring 2 is made of lead zirconate titanate, and its material parameters are the same as those in Example 1.

[0053] According to formulas (1)-(10), the resonant frequency of this embodiment is calculated as 48603 Hz. The coupling relationship of the parts is the same as that of Embodiment 1.

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Abstract

The present invention relates to a radial vibration sandwich piezoelectric ceramic ultrasonic transducer. A piezoelectric ceramic ring is arranged between a metal inner ring and a metal outer ring, the upper end surfaces of the metal inner ring, the metal outer ring and the piezoelectric ceramic ring are in the same plane, and lower end surfaces are also in the same plane. The metal inner ring and the metal outer ring can adopt steel rings, aluminum rings, brass or purple copper rings, titanium rings, aluminum nickel copper alloy rings and titanium alloy rings. The present invention realizes the high efficiency work of a radial composite transducer through a radial prestress impressed by the inner and outer metal rings, and realizes the parameter optimization of the transducer through reasonably designing the geometry size of the inner and outer metal rings simultaneously, such as resonance frequency, frequency bandwidth as well as electromechanical coupling coefficient. The present invention can be used for the high efficiency omni-directional acoustic source underwater and all kinds of supersonic processing high efficiency supersonic source in liquid.

Description

technical field [0001] The invention belongs to the technical field of methods or equipment for the generation or transmission of subsonic, audible or ultrasonic mechanical vibrations used in general mechanical operations, and specifically relates to the generation or transmission of subsonic, audible or ultrasonic vibrations using subelectric effects or electrostrictive work. Method or apparatus for frequency mechanical vibration. Background technique [0002] In the field of ultrasonic and underwater acoustic technology, the longitudinal vibration sandwich piezoelectric ceramic ultrasonic transducer is widely used. The main structure of the longitudinal vibration sandwich piezoelectric ceramic ultrasonic transducer is to set a piezoelectric A ceramic sheet, one end of the prestressed bolt is provided with a metal front cover plate, and the other end is provided with a metal rear cover plate. The longitudinal vibration sandwich piezoelectric ceramic ultrasonic transducer h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R17/00
Inventor 林书玉
Owner SHAANXI NORMAL UNIV
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