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Two-phonon crystal composite structure high-efficiency broadband air-mediated ultrasonic transducer

A technology of ultrasonic transducer and phononic crystal, which is applied in the direction of fluid using vibration, etc., to achieve the effect of increasing bandwidth, improving resolution, and improving acoustic impedance matching

Inactive Publication Date: 2021-02-19
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of existing ultrasonic transducers, and provide a high-efficiency broadband air-mediated ultrasonic transducer with a simple structure, high resolution, and a large range of action.

Method used

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  • Two-phonon crystal composite structure high-efficiency broadband air-mediated ultrasonic transducer
  • Two-phonon crystal composite structure high-efficiency broadband air-mediated ultrasonic transducer
  • Two-phonon crystal composite structure high-efficiency broadband air-mediated ultrasonic transducer

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Experimental program
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Embodiment 1

[0023] exist figure 1 , 2 Among them, a high-efficiency broadband air-mediated ultrasonic transducer with a two-phonon crystal composite structure in this embodiment is composed of a second metal plate 1 , a housing 2 , a first metal plate 3 , a piezoelectric ceramic block 4 , and a wire 5 connected together.

[0024] The first metal plate 3 and the second metal plate 1 parallel to each other are fixedly installed in the cylindrical metal shell 2, and the edges of the first metal plate 3 and the second metal plate 1 are fully in contact with the inner wall of the shell 2 without gaps. The metal plate 3, the second metal plate 1 and the housing 2 are all made of titanium alloy or aluminum alloy or stainless steel or copper, or other metal materials with high elasticity, high strength and low mechanical loss. Evenly distribute the through holes a, the thickness of the first metal plate 3 is 1 / 20 times of its own diameter, the second metal plate 1 is the same as the first metal ...

Embodiment 2

[0030] The first metal plate 3 and the second metal plate 1 parallel to each other are fixedly installed in the cylindrical metal shell 2, and the edges of the first metal plate 3 and the second metal plate 1 are in full contact with the inner wall of the shell 2 without gaps. The metal plate 3, the second metal plate 1 and the housing 2 are all made of titanium alloy or aluminum alloy or stainless steel or copper, and can also be other metal materials with high elasticity, high strength and low mechanical loss. The through holes a are evenly distributed, the thickness of the first metal plate 3 is 1 / 30 times its own diameter, the second metal plate 1 is the same as the first metal plate 3, and the distance between the second metal plate 1 and the first metal plate 3 distance

[0031]

[0032]In the formula, s 0 is the sum of the cross-sectional areas of all the through holes a on the first metal plate 3, s is the surface area of ​​the first metal plate 3, l is the depth o...

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PUM

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Abstract

A double-phonon crystal composite structure high-efficiency broadband air-coupled ultrasonic energy transducer is disclosed. A first metal plate and a second metal plate which are parallel to each other are arranged in a cylindrical metal shell of the energy transducer; through holes a are evenly distributed on the first metal plate, and the second metal plate is the same as the first metal plate;the first metal plate, the second metal plate and a cavity positioned between the first metal plate and the second metal plate form a Helmholtz resonance cavity array having a perforated structure; one side, positioned far away from the second metal plate, of the first metal plate is provided with a piezoelectric ceramic block which is a round disc or a round ring; a center line of the piezoelectric ceramic block coincides with a center line of the first metal plate, the piezoelectric ceramic block is smaller than the first metal plate in terms of diameter, the piezoelectric ceramic block isconnected with a conductor, and the metal shell of the energy transducer is connected with the conductor. The energy transducer disclosed in the invention is advantaged by simple structure, high resolution and large range of effect.

Description

technical field [0001] The invention belongs to the technical field of semiconductor devices, and in particular relates to a high-efficiency broadband gas-mediated ultrasonic transducer with a double-phonon crystal composite structure. Background technique [0002] With the development of ultrasonic technology, ultrasonic air application technology has been widely used. Ultrasonic application technologies corresponding to air media mainly include ultrasonic distance measurement, ultrasonic object recognition, ultrasonic detection of traffic flow, ultrasonic anti-theft monitoring, ultrasonic measurement of wind speed, industrial robots, material level monitoring, ultrasonic dust removal, drying and ultrasonic condensation, etc. In all air-mediated ultrasonic application technologies, the air-mediated ultrasonic transducer is a key part. Compared with other contact ultrasonic transducers, gas-mediated ultrasonic transducers have the advantages of non-contact, no coupling agen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/06
CPCB06B1/0644B06B1/0651B06B2201/55
Inventor 林书玉
Owner SHAANXI NORMAL UNIV