CN216459914U - Metamaterial acoustic lens phased array transducer - Google Patents
Metamaterial acoustic lens phased array transducer Download PDFInfo
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- CN216459914U CN216459914U CN202122903432.1U CN202122903432U CN216459914U CN 216459914 U CN216459914 U CN 216459914U CN 202122903432 U CN202122903432 U CN 202122903432U CN 216459914 U CN216459914 U CN 216459914U
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Abstract
The utility model relates to a metamaterial acoustic lens phased array transducer. The ultrasonic acoustic imaging system comprises a phased array ultrasonic transducer and a detachable ultrasonic material acoustic lens positioned above the phased array ultrasonic transducer, wherein the phased array ultrasonic transducer is piezoelectric ceramic and is arranged in an array manner according to a preset mode; the metamaterial acoustic lens takes a polystyrene matrix as a main body, and grooves are uniformly distributed on the polystyrene matrix; and the grooves of different rings are filled with polyurethane and polystyrene with different height ratios. The ultrasonic material acoustic lens is added on the phased array ultrasonic transducer, so that the acoustic focus sound pressure is improved; meanwhile, the ultrasonic material acoustic lens can be disassembled and assembled, so that when the focus of the phased array ultrasonic transducer deflects, the change of the focus position along with the change of the focus position of the phased array ultrasonic transducer can be realized by changing the internal structure of the ultrasonic material acoustic lens, and the promotion of the focus sound pressure is realized under the condition that the side lobe sound pressure is not increased when the sound focus deflects.
Description
Technical Field
The utility model relates to a metamaterial acoustic lens phased array transducer.
Background
In some application techniques of ultrasound, ultrasound focusing must be used in order to obtain high ultrasound intensity or to concentrate ultrasound energy to a certain area. The existing ultrasonic focusing mode mainly adopts acoustic lens focusing, self-focusing and phased array focusing, and the problems and defects of the existing ultrasonic focusing mode mainly comprise:
1) the focus sound energy is insufficient;
2) the focal position is fixed or can only be changed by a mechanical device;
3) when the focus is deflected, side lobes with large sound pressure appear around the main lobe.
Disclosure of Invention
The utility model aims to solve the problems that the ultrasonic focusing focus has insufficient acoustic energy, the focus position is fixed or only a mechanical device can be used for changing the focus position, and side lobes with larger sound pressure can be generated around a main lobe when the focus deflects, and provides a metamaterial acoustic lens phased array transducer.
In order to achieve the purpose, the technical scheme of the utility model is as follows: a phased array transducer of an ultrasonic material acoustic lens comprises a phased array ultrasonic transducer and an ultrasonic material acoustic lens positioned above the phased array ultrasonic transducer, wherein the phased array ultrasonic transducer is formed by piezoelectric ceramics in an array arrangement according to a preset mode; the metamaterial acoustic lens takes a polystyrene matrix as a main body, and grooves are uniformly distributed on the polystyrene matrix.
In an embodiment of the utility model, the metamaterial acoustic lens is detachable.
In an embodiment of the present invention, the grooves of different rings are filled with polyurethane and polystyrene with different height ratios.
Compared with the prior art, the utility model has the following beneficial effects:
1) the main lobe sound pressure of the sound focus is effectively improved;
2) the position of the acoustic focus is changed in space without the aid of complex mechanical structures;
3) when the sound focus deflects in the space, the sound pressure of the main lobe is effectively improved, and the sound pressure of the side lobe is reduced.
The application of the utility model is as follows: the metamaterial acoustic lens phased array transducer can be used for medical treatment, VR tactile feedback and ultrasonic control.
Drawings
FIG. 1 is a schematic diagram of the metamaterial acoustic lens phased array transducer structure of the present invention.
FIG. 2 is a top view of a metamaterial acoustic lens phased array transducer of the present invention.
Fig. 3 is a cross-sectional view a-a of fig. 2 with the acoustic focus undeflected.
Fig. 4 is a cross-sectional view a-a of fig. 2 with the acoustic focus deflected.
In the figure: 1-piezoelectric ceramic, 2-polystyrene matrix, 3-groove, 4-polystyrene and 5-polyurethane.
Detailed Description
The technical scheme of the utility model is specifically explained below with reference to the accompanying drawings.
As shown in fig. 1, the ultrasonic lens phased array transducer of the ultrasonic material of the present invention includes a phased array ultrasonic transducer and an ultrasonic lens located above the phased array ultrasonic transducer, wherein the phased array ultrasonic transducer is formed by piezoelectric ceramic 1 arranged in an array manner according to a predetermined manner; the metamaterial acoustic lens takes a polystyrene substrate 2 as a main body, and grooves 3 are uniformly distributed on the polystyrene substrate. And the grooves of different circles are filled with polyurethane 5 and polystyrene 4 with different height ratios.
The following is a specific implementation process of the present invention.
The utility model mainly comprises a phased array ultrasonic transducer and an ultrasonic material acoustic lens. The phased array ultrasonic transducer is formed by piezoelectric ceramics which are arranged in an array mode; the metamaterial acoustic lens takes a Polystyrene (PS) matrix as a main body, and grooves are uniformly distributed on the Polystyrene (PS) matrix. When the novel plastic rubber ring is used, the grooves of different rings are filled with Polyurethane (PU) and Polystyrene (PS) with different height ratios. Because the sound velocities of Polystyrene (PS) and Polyurethane (PU) are different, phase difference is generated when sound waves incident into grooves of different circle layers in the same phase are emitted; the phase difference can eliminate the influence of the phase difference caused by different sound paths from part of sound waves to the focus, thereby realizing the improvement of the focus sound pressure by utilizing the interference effect of the sound waves.
1. As shown in fig. 2 and 3, when the acoustic focus is not deflected, that is, the focus is on the acoustic axis, since the sound velocity of Polystyrene (PS) is relatively high, the height ratio of Polystyrene (PS) is gradually decreased from the outermost groove to the innermost groove, and the height ratio of Polyurethane (PU) is gradually increased.
2. As shown in fig. 2 and 4, when the acoustic focus is displaced from the acoustic axis, i.e., the focus position is deflected. The groove of the metamaterial acoustic lens at the position corresponding to the focus is regarded as the innermost circle. Correspondingly, the height proportion of Polyurethane (PU) filled in the grooves of the areas is the largest, the height proportion of the Polyurethane (PU) from the innermost circles to the outermost circles is gradually reduced, and the height proportion of the Polystyrene (PS) is gradually increased.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (3)
1. The phased array transducer is characterized by comprising a phased array ultrasonic transducer and an ultrasonic material acoustic lens positioned above the phased array ultrasonic transducer, wherein the phased array ultrasonic transducer is piezoelectric ceramic and is arranged in an array mode according to a preset mode; the metamaterial acoustic lens takes a polystyrene matrix as a main body, and grooves are uniformly distributed on the polystyrene matrix.
2. The phased array transducer of metamaterial acoustic lenses as claimed in claim 1, wherein the metamaterial acoustic lens is removable.
3. The phased array transducer of metamaterial acoustic lenses as claimed in claim 1, wherein the grooves of different turns are filled with different height ratios of polyurethane and polystyrene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122903432.1U CN216459914U (en) | 2021-11-25 | 2021-11-25 | Metamaterial acoustic lens phased array transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122903432.1U CN216459914U (en) | 2021-11-25 | 2021-11-25 | Metamaterial acoustic lens phased array transducer |
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| Publication Number | Publication Date |
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| CN216459914U true CN216459914U (en) | 2022-05-10 |
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| CN202122903432.1U Active CN216459914U (en) | 2021-11-25 | 2021-11-25 | Metamaterial acoustic lens phased array transducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101018A (en) * | 2021-11-25 | 2022-03-01 | 福州大学 | Metamaterial acoustic lens phased array transducer and method for improving focus sound pressure |
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2021
- 2021-11-25 CN CN202122903432.1U patent/CN216459914U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101018A (en) * | 2021-11-25 | 2022-03-01 | 福州大学 | Metamaterial acoustic lens phased array transducer and method for improving focus sound pressure |
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