CN110227217A - Ultrasonic transducer - Google Patents
Ultrasonic transducer Download PDFInfo
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- CN110227217A CN110227217A CN201810183131.6A CN201810183131A CN110227217A CN 110227217 A CN110227217 A CN 110227217A CN 201810183131 A CN201810183131 A CN 201810183131A CN 110227217 A CN110227217 A CN 110227217A
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- emission unit
- ultrasound emission
- ultrasonic transducer
- shell
- cavity
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- 238000002604 ultrasonography Methods 0.000 claims abstract description 68
- 239000000463 material Substances 0.000 claims description 9
- 230000002706 hydrostatic effect Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009931 pascalization Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 230000026683 transduction Effects 0.000 description 2
- 238000010361 transduction Methods 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 206010005949 Bone cancer Diseases 0.000 description 1
- 206010019695 Hepatic neoplasm Diseases 0.000 description 1
- 208000008839 Kidney Neoplasms Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 201000010260 leiomyoma Diseases 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
- A61N7/02—Localised ultrasound hyperthermia
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
- A61N2007/0004—Applications of ultrasound therapy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
- A61N2007/0078—Ultrasound therapy with multiple treatment transducers
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of ultrasonic transducers.The ultrasonic transducer includes: shell, the shell is internally provided with cavity, the inner surface of the shell is provided at least one to be had the function of reflecting ultrasonic wave for emitting the ultrasound emission unit of ultrasonic wave, the ultrasound emission unit, and the cavity is resonant cavity；The back wave that the ultrasonic wave and the ultrasound emission unit that the ultrasound emission unit issues form ultrasonic reflections focuses on the focal regions of the ultrasound emission unit.Ultrasonic transducer provided by the invention realizes resonance and focuses and can be resistant to high hydrostatic pressure, to further improve the acoustic pressure of focal regions.
Description
Technical field
The present invention relates to ultrasonic technique field, in particular to a kind of ultrasonic transducer.
Background technique
The region of energy height concentration can be obtained after focusing ultrasonic wave, which is known as focal regions.Utilize this spy
Property, China taken the lead in the technological development being high-intensity focus supersonic tumor therapeutic equipment, and apply to it is clinical carry out liver tumour,
The treatment of the innocent and malignant tumours such as kidney neoplasms, bone tumour, fibroid obtains good in terms of Therapeutic safety, validity, economy
Good effect gradually forms a new micro- non-invasive therapy technique direction.
Existing focusing ultrasonic wave mode, for example, spherical shell type focusing, lens focus, focusing mirror, phase-control focusing etc. are equal
Belong to the traveling wave type of focusing.The highest acoustic pressure that the traveling wave type of focusing reaches is 107Pa magnitude (continuous wave), minimum focal regions having a size of
Wavelength magnitude, therefore focus energy is difficult to further increase.
But in the prior art, there are no the ultrasonic transducers that one kind can further increase focal regions acoustic pressure.
Summary of the invention
The present invention provides a kind of ultrasonic transducer, for further increasing the acoustic pressure of focal regions.
To achieve the above object, the present invention provides a kind of ultrasonic transducers, comprising: the inside of shell, the shell is set
It is equipped with cavity, the inner surface of the shell is provided at least one for emitting the ultrasound emission unit of ultrasonic wave, the ultrasound
Transmitting unit has the function of reflecting ultrasonic wave, and the cavity is resonant cavity；
The ultrasonic wave that the ultrasound emission unit issues forms ultrasonic reflections with the ultrasound emission unit anti-
Ejected wave focuses on the focal regions of the ultrasound emission unit.
Optionally, the shape of the cavity is spherical shell shape or the interception hull shape including the centre of sphere, the ultrasound emission
The focal regions of unit are the sphere center position of the cavity.
Optionally, the material of the shell is aluminium alloy or steel.
Optionally, the quantity of the ultrasound emission unit is multiple, and the ultrasound emission unit is piezoelectricity array element.
Optionally, the inner surface of the ultrasound emission unit is provided with electrode protecting layer.
Optionally, the inner surface of the ultrasound emission unit is provided with matching layer.
Optionally, the working frequency of the ultrasound emission unit is 400kHz to 1200kHz.
Optionally, the hydrostatic pressing of the ultrasonic transducer tolerance is greater than or equal to 10MPa.
Optionally, the shell with a thickness of 20mm to 50mm.
The invention has the following advantages:
In the technical solution of ultrasonic transducer provided by the invention, ultrasonic transducer includes shell, the inside setting of shell
There is cavity, the inner surface of shell is provided at least one ultrasound emission unit, and ultrasonic transducer provided by the invention realizes altogether
Vibration focuses and can be resistant to high hydrostatic pressure, to further improve the acoustic pressure of focal regions.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for ultrasonic transducer that the embodiment of the present invention one provides；
Fig. 2 is Acoustic Wave Propagation schematic diagram.
Specific embodiment
To make those skilled in the art more fully understand technical solution of the present invention, the present invention is mentioned with reference to the accompanying drawing
The ultrasonic transducer of confession is described in detail.
Fig. 1 is a kind of structural schematic diagram for ultrasonic transducer that the embodiment of the present invention one provides, as shown in Figure 1, the ultrasound
Energy converter includes: shell 1, and shell 1 is internally provided with cavity 2, and it is super for emitting that the inner surface of shell 1 is provided at least one
The ultrasound emission unit 3 of sound wave, ultrasound emission unit 3 have the function of reflecting ultrasonic wave, and cavity 2 is resonant cavity；Ultrasound emission
The back wave that the ultrasonic wave and ultrasound emission unit 3 that unit 3 issues form ultrasonic reflections focuses on ultrasound emission unit 3
Focal regions.
The inside of shell 1 is formed with hollow structure, which is cavity 2.The surface of cavity 2 is shell 1
Inner surface, then ultrasound emission unit 3 is located in cavity 2 and is set to the inner surface of shell 1.
Shell 1 is the supporter of ultrasonic transducer, is also used as the shell of ultrasonic transducer.Preferably, the material of shell 1
For aluminium alloy or steel, so that ultrasonic transducer has good rigidity, to improve the height that ultrasonic transducer is resistant to
Static pressure.
The ultrasonic wave that ultrasound emission unit 3 emits propagates to focal regions, casts to ultrasound emission unit 3 by subsequent resume of focal regions
Inner surface on, ultrasound emission unit 3 inner surface formed back wave.
Preferably, the shape of cavity 2 be spherical shell shape or the interception hull shape including the centre of sphere, ultrasound emission unit 3
Focal regions are the sphere center position of transducer housing 2.In the present embodiment, the shape of cavity 2 is the interception hull shape including the centre of sphere, tool
Body, the shape of cavity 2 is billiard table shape, for example, the shape of cavity 2 is cydariform.In practical applications, the shape of cavity 2 may be used also
Think other shapes, will not enumerate herein.
Fig. 2 is Acoustic Wave Propagation schematic diagram, as shown in Fig. 2, the ultrasonic wave that ultrasound emission unit 3 emits propagates to sphere center position
O is cast on the inner surface of ultrasound emission unit 3 by subsequent resume of sphere center position O, then the inner surface through ultrasound emission unit 3
Reflect to form back wave.It is when cavity 2 meets resonance condition, i.e., directly poly- at sphere center position O when cavity 2 forms resonant cavity
Burnt ultrasonic wave is identical with the phase of back wave, therefore sound wave superposition can be formed at sphere center position O, so that shape in resonant cavity
At the very high stable sound-filed simulation of intensity, so that reaching high sound pressure at sphere center position O, to improve the acoustic pressure of focal regions.
Ultrasound emission unit 3 is located on the inner surface of shell 1, specifically, can paste on the inner surface of shell 1 multiple super
Sound emission unit 3.The outer surface of ultrasound emission unit 3 can then affix to the outer surface of ultrasound emission unit 3 towards shell 1
On the inner surface of shell 1.Preferably, the quantity of ultrasound emission unit 3 is multiple, and ultrasound emission unit 3 is piezoelectricity array element, example
Such as, the material of piezoelectricity array element is piezoelectric ceramics or 1-3 type piezo-electricity composite material.Multiple ultrasound emission units 3 are combined using array element
Formula structure.In the present embodiment, the parameter of piezoelectricity array element can be designed according to the shape and focusing requirement of cavity 2, can pass through Numerical-Mode
Influence of the quantity and arrangement mode of quasi- technique study piezoelectricity array element to focusing performance and acoustic pressure, research shows that result focal regions
Acoustic pressure size and the number of piezoelectricity array element at (sphere center position O) is proportional.Multiple piezoelectricity array elements are arranged successively in cavity 2
Surface on, it is preferable that multiple piezoelectricity array elements are arranged on the surface of cavity 2 in a manner of equidistant solid matter, are conducive to super
The inhibition of the secondary lobe of sound wave.In addition, the mode of oscillation of piezoelectricity array element uses thickness vibration mode, to improve its electroacoustic conversion effect
Rate.
Optionally, the inner surface of ultrasound emission unit 3 may be provided with electrode protecting layer (not drawing specifically in figure).It is preferred that
Ground, the material of electrode protecting layer are nickel or nonmetallic materials.The inner surface of ultrasound emission unit 3 is cathode, then can will be ultrasonic
The cathode chemical nickel plating or nonmetallic materials of transmitting unit 3, to form electrode protecting layer.The production of above-mentioned electrode protecting layer
Journey can carry out before ultrasound emission unit 3 is set to the inner surface of shell 1, and the process for forming electrode protecting layer is to ultrasound
Transmitting unit 3 carries out pretreated process.The electrode protecting layer can play the protective effect of the electrode to ultrasound emission unit 3.
Optionally, the settable matching layer of the inner surface of ultrasound emission unit 3 (not drawn specifically in figure).Preferably, it matches
The material of layer is high molecular material.The inner surface of ultrasound emission unit 3 is cathode, then can be on the cathode of ultrasound emission unit 3
Make polymer material layer.The manufacturing process of above-mentioned matching layer can the inner surface that ultrasound emission unit 3 is set to shell 1 it
Preceding progress, the process for forming matching layer are to carry out pretreated process to ultrasound emission unit 3.Matching layer is ultrasonic transducer
Important component, the effect of matching layer are to match between ultrasound emission unit and the medium (such as water) of ultrasonic transducer
Acoustic impedance difference is able to achieve acoustic impedance match or transition, enables sound transmitance between ultrasound emission unit and medium water substantially
Degree improves, and can broaden the bandwidth of ultrasonic transducer at the same time, be improved the acoustic wave energy utilization rate of energy converter, performance
Improved.The frequency given for one, the thickness of matching layer are 1/4 λ in principle, but can be according to the experiment of ultrasonic transducer
Data carry out thickness amendment, and method is first to carry out design of Simulation by the bandwidth of ultrasonic transducer and electro-acoustic conversion efficiency, further according to
Experimental result determines the thickness of matching layer.In the present embodiment, setting matching layer enables ultrasonic wave preferably to emit, and
Improve the reflectivity of back wave.
Further, ultrasonic transducer further include: upper end cover 4 and lower cover 5.Upper end cover 4 is located at the top of cavity 2,
And upper end cover 4 is installed on shell 1；Lower cover 5 is located at the lower section of cavity 2, and lower cover 5 is installed on shell 1.
Further, which includes: attachment base 6 and power supply air plug connector 7.Preferably, attachment base 6 is resistance to compression
Attachment base, power supply air plug connector 7 are resistance to compression power supply air plug connector.Attachment base 6 and power supply air plug connector 7 be all made of watertight connector and
Integration vulcanization cable mode, sealing means are sealed using sealing ring and vulcanization of rubber sealing technology.It navigates to attachment base 6 and power supply
The mounting surface of connection-peg 7 takes dual-seal, while each every core of electrical connection takes quadruple sealing ring to seal.Every set attachment base 6
The sulphur hermetically sealed using rubber to the tail portion of each attachment base 6 and power supply air plug connector 7 after completing with power supply air plug connector 7
Chemical industry skill, it is ensured that the hydrostatic pressing >=10MPa being resistant to.Dedicated pressure resistance is smeared when installing attachment base 6 and power supply air plug connector 7
Stop-leak compound ensures to seal and pressure-resistant index.The connecting cable of attachment base 6 and power supply air plug connector 7 is to meet resistance to pressure request simultaneously
Particularly customized cable, every set cable take stringent pressure test and the detection of relevant technical indicator after completing.
In the present embodiment, the width of cavity 2 is 200mm to 1000mm.For example, when cavity 2 shape be spherical shell shape or
When interception hull shape including the centre of sphere, the diameter of cavity 2 is 200mm to 1000mm.
In the present embodiment, the working frequency of ultrasound emission unit 3 is 400kHz to 1200kHz.
In the present embodiment, the hydrostatic pressing of ultrasonic transducer tolerance is greater than or equal to 10MPa.The ultrasonic transducer has resistance to height
The characteristics of hydrostatic pressing, improves the purpose of cavitation threshold to reach inhibition medium cavitation.Ultrasonic transducer in the present embodiment
It can be used in the environment of deep water, pressurization or normal pressure.
In the present embodiment, the acoustic pressure of focal regions is more than or equal to 109Pa。
In the present embodiment, shell 1 with a thickness of 20mm to 50mm.
In the technical solution of ultrasonic transducer provided in this embodiment, ultrasonic transducer includes shell, and the inside of shell is set
It is equipped with cavity, the inner surface of shell is provided at least one ultrasound emission unit, and ultrasonic transducer provided in this embodiment is realized
Resonance focuses and can be resistant to high hydrostatic pressure, to further improve the acoustic pressure of focal regions.Ultrasonic transduction in the present embodiment
Device is by being arranged cavity in the inside of shell and can form ultrasonic transduction in the inner surface setting ultrasound emission unit of shell
The basic structure of device, technology difficulty and processing request are lower, consequently facilitating realizing and reducing costs.Shell of the invention it is interior
Surface is both the reflecting surface of ultrasound emission face and sound wave, passes through ultrasonic transducer frequency-tracking and compensation, phase controlling, ultrasound
Wave transmitting realizes acoustic resonance focusing with reflection, is able to achieve stable spherical standing wave focusing acoustic field and the fine focal regions of sub-wavelength,
So that ultrasonic transducer can get 109The high sound pressure of Pa, to provide new research platform for scientific research.In the present embodiment,
Ultrasound emission unit is located at the inner surface of shell, and ultrasound emission unit can emit ultrasonic wave and pass ultrasonic wave directly in the medium
It broadcasts, since shell is rigid and thickness is the decades of times of ultrasonic wavelength, the emission effciency of the ultrasonic transducer is higher.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of ultrasonic transducer characterized by comprising shell, the shell are internally provided with cavity, the shell
Inner surface, which is provided at least one, has reflectance ultrasound for emitting the ultrasound emission unit of ultrasonic wave, the ultrasound emission unit
The function of wave, the cavity are resonant cavity；
The back wave that the ultrasonic wave and the ultrasound emission unit that the ultrasound emission unit issues form ultrasonic reflections
Focus on the focal regions of the ultrasound emission unit.
2. ultrasonic transducer according to claim 1, which is characterized in that the shape of the cavity be spherical shell shape or including
Interception hull shape including the centre of sphere, the focal regions of the ultrasound emission unit are the sphere center position of the cavity.
3. ultrasonic transducer according to claim 1, which is characterized in that the material of the shell is aluminium alloy or steel.
4. ultrasonic transducer according to claim 1, which is characterized in that the quantity of the ultrasound emission unit be it is multiple,
The ultrasound emission unit is piezoelectricity array element.
5. ultrasonic transducer according to claim 1, which is characterized in that the inner surface of the ultrasound emission unit is provided with
Electrode protecting layer.
6. ultrasonic transducer according to claim 1, which is characterized in that the inner surface of the ultrasound emission unit is provided with
Matching layer.
7. ultrasonic transducer according to claim 1, which is characterized in that the working frequency of the ultrasound emission unit is
400kHz to 1200kHz.
8. ultrasonic transducer according to claim 1, which is characterized in that the hydrostatic pressing of the ultrasonic transducer tolerance is greater than
Or it is equal to 10MPa.
9. ultrasonic transducer according to claim 1, which is characterized in that the shell with a thickness of 20mm to 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183131.6A CN110227217A (en) | 2018-03-06 | 2018-03-06 | Ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183131.6A CN110227217A (en) | 2018-03-06 | 2018-03-06 | Ultrasonic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110227217A true CN110227217A (en) | 2019-09-13 |
Family
ID=67862160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810183131.6A Pending CN110227217A (en) | 2018-03-06 | 2018-03-06 | Ultrasonic transducer |
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| Country | Link |
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| CN (1) | CN110227217A (en) |
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 | An ultrasound phase-control focusing transducer based on spherical lens |
| CN102210910A (en) * | 2010-04-02 | 2011-10-12 | 重庆融海超声医学工程研究中心有限公司 | Ultrasonic transducer |
| CN202802550U (en) * | 2012-08-31 | 2013-03-20 | 中国科学院深圳先进技术研究院 | Ultrasonic transducer |
| KR20170060355A (en) * | 2015-11-24 | 2017-06-01 | 한국전기연구원 | Focused Ultrasonic Transducer |
| CN208911313U (en) * | 2018-03-06 | 2019-05-31 | 重庆海扶医疗科技股份有限公司 | Ultrasonic transducer |
-
2018
- 2018-03-06 CN CN201810183131.6A patent/CN110227217A/en active Pending
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 | An ultrasound phase-control focusing transducer based on spherical lens |
| CN102210910A (en) * | 2010-04-02 | 2011-10-12 | 重庆融海超声医学工程研究中心有限公司 | Ultrasonic transducer |
| CN202802550U (en) * | 2012-08-31 | 2013-03-20 | 中国科学院深圳先进技术研究院 | Ultrasonic transducer |
| KR20170060355A (en) * | 2015-11-24 | 2017-06-01 | 한국전기연구원 | Focused Ultrasonic Transducer |
| CN208911313U (en) * | 2018-03-06 | 2019-05-31 | 重庆海扶医疗科技股份有限公司 | Ultrasonic transducer |
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Address after: No. 359, jingdongfang Avenue, Beibei District, Chongqing 400714 Applicant after: Chongqing Haifu Medical Technology Co.,Ltd. Address before: 401121 No. 1 Pine Road, man Town, Chongqing, Yubei District Applicant before: Chongqing Haifu Medical Technology Co.,Ltd. |