CN113996518B - Dual-lens focusing ultrasonic transducer amplifying structure - Google Patents
Dual-lens focusing ultrasonic transducer amplifying structure Download PDFInfo
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- CN113996518B CN113996518B CN202111368775.0A CN202111368775A CN113996518B CN 113996518 B CN113996518 B CN 113996518B CN 202111368775 A CN202111368775 A CN 202111368775A CN 113996518 B CN113996518 B CN 113996518B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0644—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B3/02—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency involving a change of amplitude
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B3/04—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency involving focusing or reflecting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a double-lens focusing ultrasonic transducer amplifying structure which is provided with a low-sound-velocity material acoustic lens, a high-sound-velocity material acoustic lens and a piezoelectric ceramic plate, wherein the piezoelectric ceramic plate is connected with the high-sound-velocity material acoustic lens, the low-sound-velocity material acoustic lens is connected with the high-sound-velocity material acoustic lens, a second-order stepped structure communicated with the high-sound-velocity material acoustic lens is arranged at the center of an acoustic shaft of the low-sound-velocity material acoustic lens, and the second-order stepped structure is provided with a first-order diameter, a depth, a second-order diameter and a height. The invention adopts a multi-step amplifying structure at the center of the acoustic axis of the double-lens focusing ultrasonic transducer. The multi-step structure changes the local vibration mode of the concave spherical surface of the high sound velocity material, releases the meta-set of the central stress, reduces the problems of overhigh central deformation, large material internal loss and the like, and effectively improves the sound radiation efficiency and prolongs the service life of the transducer by combining with the filled low sound velocity material.
Description
Technical Field
The invention relates to the technical field of ultrasonic waves, in particular to an amplification structure of a double-lens focusing ultrasonic transducer.
Background
There are a variety of implementation structures for focused ultrasound transducers: concave spherical surface focusing, acoustic lens focusing, multi-primitive circular plane spherical surface focusing array, multi-primitive spherical surface focusing array, phased array and the like, wherein the small-size focusing ultrasonic transducer generally selects a simple structure of concave spherical surface focusing and acoustic lens focusing. The acoustic lens focusing ultrasonic transducer is formed by gluing a round plane piezoelectric ceramic plate and a concave spherical acoustic lens made of high-sound-speed materials, the concave spherical surface focusing ultrasonic transducer directly adopts the concave spherical piezoelectric ceramic plate, the front end of the radiation surface is a concave spherical surface, and propagation medium filling (such as water and coupling agent) is needed for coupling with the plane, so that inconvenience is brought to operators.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problems in the prior art in the background art, a dual-lens focusing ultrasonic transducer amplifying structure is provided.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a dual-lens focusing ultrasonic transducer amplification structure, has low sound velocity material sound lens, high sound velocity material sound lens, piezoceramics piece is connected high sound velocity material sound lens, low sound velocity material sound lens connect in high sound velocity material sound lens, low sound velocity material sound lens's acoustic axis center is equipped with the intercommunication high sound velocity material sound lens's second order ladder structure, second order ladder structure has first order diameter, degree of depth, second order diameter, height.
The material of the low sound velocity material acoustic lens is low sound velocity silicon rubber; the high sound speed material acoustic lens is made of metal.
The low sound velocity material acoustic lens in the technical scheme is a biconvex spherical acoustic lens.
The low sound velocity material acoustic lens in the technical scheme is a biconvex spherical acoustic lens.
The low sound velocity material acoustic lens is a single convex spherical acoustic lens.
After the technical scheme is adopted, the invention has the following positive effects:
the invention adopts the multi-step amplifying structure at the center of the acoustic axis of the double-lens focusing ultrasonic transducer, and the radiation surface can be made into a convex spherical surface shape and a plane shape. The multi-step structure changes the local vibration mode of the concave spherical surface of the high sound velocity material, releases the meta-set of the central stress, reduces the problems of overhigh central deformation, large material internal loss and the like, and effectively improves the sound radiation efficiency and prolongs the service life of the transducer by combining with the filled low sound velocity material.
The low sound speed material acoustic lens participates in the focusing process of acoustic propagation of the double-lens focusing ultrasonic transducer, and the low sound speed material acoustic attenuation coefficient is far greater than that of water and couplant, so that the acoustic output efficiency of the lens double-lens focusing ultrasonic transducer is lower than that of the concave spherical acoustic lens focusing ultrasonic transducer.
The invention provides an exhaust passage for the transducer low sound speed material acoustic lens injection molding die.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a schematic view of the structure of an embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of embodiment 2 of the present invention;
FIG. 3 is a schematic view of the structure of embodiment 3 of the present invention;
fig. 4 is a schematic structural view of embodiment 4 of the present invention.
In the figure: the piezoelectric ceramic plate comprises a low sound velocity material acoustic lens 1, a high sound velocity material acoustic lens 2, a piezoelectric ceramic plate 3, a second-order stepped structure 4, a first-order diameter RB, a depth TB, a second-order diameter RA and a height TA.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1
Referring to fig. 1 and 2, the invention provides a dual-lens focusing ultrasonic transducer amplifying structure, which is provided with a low-sound-velocity material acoustic lens 1, a high-sound-velocity material acoustic lens 2 and a piezoelectric ceramic plate 3, wherein the piezoelectric ceramic plate is connected with the high-sound-velocity material acoustic lens, the low-sound-velocity material acoustic lens 1 is connected with the high-sound-velocity material acoustic lens 2, a second-order stepped structure 4 communicated with the high-sound-velocity material acoustic lens 2 is arranged in the center of an acoustic axis of the low-sound-velocity material acoustic lens 1, and the second-order stepped structure 4 is provided with a first-order diameter RB, a depth TB, a second-order diameter RA and a height TA. Namely, the central hole of the concave spherical surface of the high sound speed material acoustic lens 2 provides an exhaust passage for the injection molding of the low sound speed material at the same time, and the low sound speed material starts to be injected into the central hole of the concave spherical surface of the high sound speed material acoustic lens 2, so that the low sound speed material acoustic lens 1 is formed.
The acoustic lens 1 is made of low-sound-velocity silicon rubber; the high sound speed material the acoustic lens 2 is made of metal.
The low sound speed material acoustic lens 1 is a biconvex spherical acoustic lens, with TA, RA, TB and RB values. And according to the working frequency and the radiation area of the focusing transducer, TA, RA, TB and RB values in a proper second-order structure are selected, so that the sound output efficiency is improved. Specific data needs to be determined based on transducer operating frequency, radiation diameter, focal length, acoustic properties of the high acoustic material and the low acoustic speed material.
Specifically, in the second-order stepped structure 4, the height ta=4.3 mm, the second-order diameter ra=2.0 mm, the depth tb=2.3 mm, and the first-order diameter rb=7.0 mm. The diameter of the radiation surface of the 800KHz focusing transducer is 50mm, the focal position range is 50+/-10 mm, a double-lens focusing mode is adopted, the curvature radius of the concave spherical surface and the convex spherical surface is 100mm, and the maximum sound pressure level of the sound shaft is improved by at least about 10 dB.
Example 2
Referring to fig. 2, the low sound speed material acoustic lens 1 is a single convex spherical acoustic lens. And selecting TB and RB values in a proper second-order structure according to the working frequency and the radiation area of the focusing transducer, so that the sound output efficiency is improved. And according to the working frequency and the radiation area of the focusing transducer, TA, RA, TB and RB values in a proper second-order structure are selected, so that the sound output efficiency is improved. Specifically, the height ta=4.3 mm, the second order diameter ra=2.0 mm, the depth tb=2.3 mm, and the first order diameter rb=7.0 mm. The diameter of the radiation surface of the 800KHz focusing transducer is 50mm, the focal position range is 50+/-10 mm, a double-lens focusing mode is adopted, the curvature radius of the concave spherical surface is 100mm, and the maximum sound pressure level of the sound shaft is improved by at least about 10 dB.
Example (3)
Referring to fig. 3, the low sound velocity material acoustic lens 1 is a biconvex spherical acoustic lens. And selecting proper TB and RB values in the first-order structure according to the working frequency and the radiation area of the focusing transducer, so that the sound output efficiency is improved.
In the first-step structure, the depth TB is a through hole, and the first-step diameter rb=2.0 mm. The diameter of the radiation surface of the 800KHz focusing transducer is 50mm, the focal position range is 50+/-10 mm, a double-lens focusing mode is adopted, the curvature radius of the concave spherical surface and the convex spherical surface is 100mm, and the maximum sound pressure level of the sound shaft is improved by at least about 6 dB.
Example 4
Referring to fig. 4, the low sound speed material acoustic lens 1 is a single convex spherical acoustic lens. And selecting proper TB and RB values in the first-order structure according to the working frequency and the radiation area of the focusing transducer, so that the sound output efficiency is improved.
Specifically, in the first-step structure, the depth TB is a through hole, and the first-step diameter rb=2.0 mm. The diameter of the radiation surface of the 800KHz focusing transducer is 50mm, the focal position range is 50+/-10 mm, a double-lens focusing mode is adopted, the curvature radius of the concave spherical surface is 100mm, and the maximum sound pressure level of the sound shaft is improved by at least about 6 dB.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (4)
1. The utility model provides a dual lens focusing ultrasonic transducer increases structure which characterized in that: the high-sound-speed material acoustic lens comprises a low-sound-speed material acoustic lens (1), a high-sound-speed material acoustic lens (2) and a piezoelectric ceramic plate (3), wherein the piezoelectric ceramic plate (3) is connected with the high-sound-speed material acoustic lens (2), the low-sound-speed material acoustic lens (1) is connected with the high-sound-speed material acoustic lens (2), a second-order stepped structure (4) communicated with the high-sound-speed material acoustic lens (2) is arranged in the center of an acoustic shaft of the low-sound-speed material acoustic lens (1), and the second-order stepped structure (4) comprises a first-order diameter (RB), a depth (TB), a second-order diameter (RA) and a height (TA).
2. The dual-lens focused ultrasound transducer amplifying structure according to claim 1, wherein: the material of the low sound speed material acoustic lens (1) is low sound speed silicon rubber; the high sound speed material acoustic lens (2) is made of metal.
3. The dual-lens focused ultrasound transducer amplifying structure according to claim 1, wherein: the low sound speed material acoustic lens (1) is a biconvex spherical acoustic lens.
4. The dual-lens focused ultrasound transducer amplifying structure according to claim 1, wherein: the low sound speed material acoustic lens (1) is a single convex spherical acoustic lens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111368775.0A CN113996518B (en) | 2021-11-18 | 2021-11-18 | Dual-lens focusing ultrasonic transducer amplifying structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111368775.0A CN113996518B (en) | 2021-11-18 | 2021-11-18 | Dual-lens focusing ultrasonic transducer amplifying structure |
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| CN113996518A CN113996518A (en) | 2022-02-01 |
| CN113996518B true CN113996518B (en) | 2023-10-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024153742A1 (en) * | 2023-01-19 | 2024-07-25 | Ams-Osram Ag | Sensor device for vital sign detection |
| CN116078648B (en) * | 2023-03-08 | 2024-04-30 | 福州大学 | Ultrasonic array board |
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| CN101484208A (en) * | 2006-07-21 | 2009-07-15 | 海扶宁高强超声技术（北京）有限公司 | Ultrasonic phase-controlled focusing transducer based on spherical convex lens |
| CN103402437A (en) * | 2011-11-02 | 2013-11-20 | 松下电器产业株式会社 | Ultrasound probe |
| CN111112037A (en) * | 2020-01-20 | 2020-05-08 | 重庆医科大学 | Lens type multi-frequency focusing ultrasonic transducer, transduction system and method for determining axial length of acoustic focal region of lens type multi-frequency focusing ultrasonic transducer |
| CN111840829A (en) * | 2020-07-21 | 2020-10-30 | 无锡迈普科技有限公司 | Multilayer lens focusing ultrasonic probe |
| CN217491551U (en) * | 2021-11-18 | 2022-09-27 | 无锡海鹰医疗科技股份有限公司 | Double-lens focusing ultrasonic transducer amplifying structure |
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- 2021-11-18 CN CN202111368775.0A patent/CN113996518B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101484208A (en) * | 2006-07-21 | 2009-07-15 | 海扶宁高强超声技术（北京）有限公司 | Ultrasonic phase-controlled focusing transducer based on spherical convex lens |
| CN103402437A (en) * | 2011-11-02 | 2013-11-20 | 松下电器产业株式会社 | Ultrasound probe |
| CN111112037A (en) * | 2020-01-20 | 2020-05-08 | 重庆医科大学 | Lens type multi-frequency focusing ultrasonic transducer, transduction system and method for determining axial length of acoustic focal region of lens type multi-frequency focusing ultrasonic transducer |
| CN111840829A (en) * | 2020-07-21 | 2020-10-30 | 无锡迈普科技有限公司 | Multilayer lens focusing ultrasonic probe |
| CN217491551U (en) * | 2021-11-18 | 2022-09-27 | 无锡海鹰医疗科技股份有限公司 | Double-lens focusing ultrasonic transducer amplifying structure |
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