CN110404187A - Generate method, the superelevation acoustic pressure generation device of superelevation acoustic pressure - Google Patents
Generate method, the superelevation acoustic pressure generation device of superelevation acoustic pressure Download PDFInfo
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- CN110404187A CN110404187A CN201810404153.0A CN201810404153A CN110404187A CN 110404187 A CN110404187 A CN 110404187A CN 201810404153 A CN201810404153 A CN 201810404153A CN 110404187 A CN110404187 A CN 110404187A
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- ultrasonic wave
- acoustic pressure
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- superelevation
- cavitation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
- A61N2007/0056—Beam shaping elements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
- A61N2007/0056—Beam shaping elements
- A61N2007/0069—Reflectors
Abstract
The present invention provides a kind of method of generation superelevation acoustic pressure, superelevation acoustic pressure generation device, belong to high intensity focused ultrasound technology and high-energy physics technical field, it, which can solve the problem of that the superelevation acoustic pressure inside existing acoustic cavitation is difficult to control, causes it that can not be used effectively.The method of generation superelevation acoustic pressure of the invention includes: the ultrasonic wave of the sounding face transmitting focusing by being set in sound bearing medium, sounding face reflection at least partly ultrasonic wave, the ultrasonic wave of the transmitting and the ultrasonic wave of reflection form the standing-wave sound field of focusing on the inside of sounding face；Cause cavitation in the focal regions region of standing-wave sound field, cavitation bubble collapse generates superelevation acoustic pressure.
Description
Technical field
The invention belongs to high intensity focused ultrasound technical fields, and in particular to a kind of method, superelevation for generating superelevation acoustic pressure
Acoustic pressure generation device.
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 (to continuous wave), 108Pa magnitude is (right
Impulse wave), minimum focal regions are difficult to further increase having a size of wavelength magnitude, focus energy, lead to not study higher amount grade
Effect of the energy possessed by acoustic pressure to oncotherapy.
In the prior art, under certain condition, cavitation bubble is capable of forming to rigid interface surface using focusing ultrasonication,
By the communication process for the shock wave that the cavitation bubble avalanche for being adhered to rigid surface that high-speed camera is shot emits, can calculate
The pressure of walls is 7.7 ± 1.6GPa out.Meanwhile correlative study and theoretical calculation show the sound generated when cavitation bubble collapse
Pressure can reach 109Pa magnitude.But the range of this cavitation bubble that rigid surface formation is focused on by traveling wave is difficult to by about
Beam, although therefore cavitation can generate superelevation acoustic pressure, can not be had because the uncontrollability of cavitation range leads to its energy still
Effect utilizes.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art, provide one kind can generate be greater than or
Person is equal to 109Pa magnitude, and the production method of the superelevation acoustic pressure of range-controllable.
Solving technical solution used by present invention problem is a kind of method for generating superelevation acoustic pressure, comprising:
Ultrasonic wave by the sounding face transmitting focusing being set in sound bearing medium, sounding face reflection at least partly ultrasonic wave,
The ultrasonic wave of the transmitting and the ultrasonic wave of reflection form the standing-wave sound field of focusing on the inside of sounding face；In the focal regions of standing-wave sound field
Cause cavitation in region, cavitation bubble collapse generates superelevation acoustic pressure.
Preferably, it is described by be set to sound bearing medium in sounding face transmitting focusing ultrasonic wave the step of before also wrap
It includes: the static pressure of sound bearing medium is at least forced into predetermined threshold.
It is further preferred that the predetermined threshold is 8MPa.
It is further preferred that it is described by be set to sound bearing medium in sounding face transmitting focusing ultrasonic wave the step of it is specific
Include:
Start the ultrasonic wave of transmitting focusing with first frequency by the sounding face in sound bearing medium；
The frequency of the ultrasonic wave is adjusted, until the ultrasonic wave of the transmitting and the ultrasonic wave of the reflection shape on the inside of sounding face
At the standing-wave sound field of focusing.
It is further preferred that the cavitation that causes in the focal regions region of standing-wave sound field specifically includes:
The intensity of the ultrasonic wave is adjusted, to cause cavitation in the focal regions region of standing-wave sound field.
Preferably, the superelevation acoustic pressure generated when cavitation bubble collapses is more than or equal to 109Pa。
Preferably, in focal regions region cause cavitation range in any direction on size be less than or equal to ultrasonic wave
Wavelength.
Preferably, the waveform of the ultrasonic wave is one of continuous wave, train of pulse wave.
Preferably, the sound bearing medium includes deionization de aerated water.
Preferably, the shape of the sounding face is spherical surface, cylindrical surface, any one in truncated-spherical.
Solving technical solution used by present invention problem is a kind of superelevation acoustic pressure generation device, comprising:
Sound bearing medium housing unit, for accommodating sound bearing medium；
Phonation unit in sound bearing medium housing unit, with sounding face, the phonation unit is for passing through hair
The ultrasonic wave that sound surface launching focuses, sounding face can reflect at least partly ultrasonic wave, so that the ultrasonic wave of the transmitting and reflection
Ultrasonic wave forms the standing-wave sound field of focusing on the inside of sounding face, and causes cavitation in the focal regions region of standing-wave sound field,
It is collapsed by cavitation bubble and generates superelevation acoustic pressure.
Preferably, the sound bearing medium housing unit is hyperbaric chamber.
Preferably, the superelevation acoustic pressure generation device further include: presser unit, for by the static pressure of sound bearing medium at least
It is forced into predetermined threshold.
In the method for generation superelevation acoustic pressure of the invention, using ultrasonic wave transmitting and reflect to form standing-wave sound field, and
Independently cause cavitation in the focal regions of standing-wave sound field, so as to form 109The superelevation acoustic pressure of Pa magnitude, meanwhile, utilize standing-wave sound field
Sound tweezer act on by cavitation scope limitation within the scope of focal regions, to effectively control cavitation range, and then facilitate to cavitation institute
The effective use of the superelevation acoustic pressure of generation.
Detailed description of the invention
Fig. 1 is the flow chart of the superelevation acoustic pressure production method of the embodiment of the present invention；
Fig. 2 is the schematic illustration of the superelevation acoustic pressure production method of the embodiment of the present invention；
Fig. 3 is the propagation schematic diagram of ultrasonic wave in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the superelevation acoustic pressure generation device of the embodiment of the present invention；
Wherein appended drawing reference are as follows: 1, sound bearing medium housing unit；2, pressure gauge；5, air plug ring flange；6, cable resistance to compression turns
Connect device；8, large power supply；9, supercharging device；10, purifier；11, solenoid valve；13, water inlet interface；14, drainage interface；
15, mounting seat；16, quick operating valve；18, ultrasonic transducer.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Present invention is further described in detail for formula.
Embodiment 1:
As shown in Figure 1 to Figure 3, the present embodiment provides a kind of method for generating superelevation acoustic pressure, it can be used for ultrasonic transducer
Superelevation acoustic pressure is generated (to be greater than or equal to 109The acoustic pressure of Pa magnitude).
The method of the generation superelevation acoustic pressure includes:
Ultrasonic wave by the sounding face transmitting focusing being set in sound bearing medium；By sounding face at least partly ultrasonic wave
Reflection, the standing-wave sound field of focusing is formed on the inside of sounding face；Cause cavitation in the focal regions region of standing-wave sound field, cavitation bubble collapses
It bursts and generates superelevation acoustic pressure.
" causing cavitation within the scope of the focal regions of standing-wave sound field, cavitation bubble collapse generates superelevation acoustic pressure " refers to, certain
Under the static pressure of sound bearing medium, by controlling the characteristic parameters such as emitted frequency, the power of ultrasonic wave, cavitation is made to only occur in hair
It within the scope of the focal regions of standing-wave sound field in sound face, and is constrained in the region, to realize the control to cavitation range, Jin Ershi
The control of the range of generated superelevation acoustic pressure is now collapsed to cavitation bubble.
Wherein, above method can be realized by ultrasonic transducer, i.e., ultrasonic wave therein, which can be, passes through ultrasonic transducer
It generates, and the present embodiment is illustrated for generating superelevation acoustic pressure using ultrasonic transducer below.
Ultrasonic transducer includes shell, and housing outer surface is provided with phonation unit (such as high-power driving power supply), can
Generate ultrasonic wave.Shell inner surface can be used as the above sounding face (the ultrasonic wave surface of emission), and it has the function of reflecting ultrasonic wave,
To constitute a resonant cavity inside housings.Sound bearing medium is filled in shell, sound bearing medium has certain static pressure, preferably
, sound bearing medium may include deionization de aerated water, to guarantee that cavitation energy is horizontal while keeping ultrasound-transmissive.Wherein, it goes
Ion de aerated water can be provided by purifier.
The ultrasonic wave that phonation unit issues can penetrate the shell of ultrasonic transducer, issue from the inner surface of shell, and borrow
It helps sound bearing medium to be transmitted in shell, can be reflected after encountering sounding face, finally, the ultrasonic wave that phonation unit issues
Standing-wave sound field is formed inside housings with the ultrasonic wave after reflection, and forms the loud intermediate pressure section of sub-wavelength in focal regions zone focusing.
Wherein, the intensity of the ultrasonic wave emitted in the present embodiment independently should cause cavitation in focal regions region enough, and sound bearing medium is enabled to exist
Focal regions region forms cavitation bubble group.Under the action of the ultrasonic wave of alternation, cavitation bubble group slowly expands downwards in negative pressure, in positive pressure
Collapse is shunk, sharply downwards so as to form the environment of high temperature and pressure in focal regions region using cavitation.Also, the present embodiment
In, since " the sound tweezer " of standing-wave sound field acts on, cavitation bubble group caused by cavitation can be clamped down on, make cavitation bubble group always
Within the scope of focal regions, to realize effective control to cavitation range, and then facilitate to superelevation acoustic pressure caused by cavitation
Effective use, with the controllable superelevation acoustic pressure of reach.
Specifically, as illustrated in fig. 1 and 2, the production method of the superelevation acoustic pressure in the present embodiment can include:
It is S0, preferred, the static pressure of sound bearing medium is at least forced by predetermined threshold by supercharging device.
In the present embodiment, independently occur cavitation in focal regions region using standing-wave sound field, and cavitation threshold and cavitation zone
Range size is related with environmental stress (static pressure of sound bearing medium).The generation of the increase meeting suppression cavitation of static pressure, improves cavitation threshold
Value, at this time, it may be necessary to the ultrasonic wave of higher intensity ensures the generation of cavitation, therefore in this case, the intensity of the cavitation of generation
Also bigger, namely to be formed by super high sound pressure levels also higher for final cavitation bubble collapse.Meanwhile with the static pressure of sound bearing medium
Increase, the range of cavitation zone can exponentially form be gradually reduced.That is, by the static pressure for promoting sound bearing medium, it can
High-intensitive cavitation bubble is compressed within the more small range in focal regions, so as to realize small-scale superelevation acoustic pressure, is improved
The precision of the generation range of superelevation acoustic pressure is further realized and is precisely controlled to superelevation acoustic pressure generation range.Simultaneously as transaudient
The static pressure of medium is related with cavitation threshold, if first emitting ultrasonic wave, then adjusts static pressure, then may need to readjust ultrasonic wave
The parameters such as tranmitting frequency, intensity.Therefore the static pressure of sound bearing medium is first preferably forced into predetermined threshold or more in the present embodiment, then
Emit ultrasonic wave, again to simplify operating procedure.
Wherein, it is preferred that the predetermined threshold of the static pressure of sound bearing medium is 8MPa.That is, it is preferred that by the static pressure of sound bearing medium
It is forced into 8MPa or more.Existing experimental data shows that when static pressure reaches 8MPa, the range of cavitation zone can be contracted to half of wave
Long magnitude, and be formed by superelevation acoustic pressure and can reach 109Pa magnitude, much larger than can be formed in the prior art 108Pa magnitude.
S1, the ultrasonic wave for starting transmitting focusing with first frequency by the sounding face in sound bearing medium.
Wherein, first frequency can be optional frequency.That is, phonation unit begins through sounding surface launching ultrasonic wave
When, power and frequency to ultrasonic wave do not do special concrete restriction, although the ultrasonic wave emitted at this time also can be by sounding face
Reflection, but standing-wave sound field can centainly can not be formed in generating surface.
Of course it is to be appreciated that sound bearing medium should have certain static pressure.And if including above-mentioned pressurization steps (S0)
When, then sound bearing medium at this time should have it is above it is pressurized after the static pressure for reaching predetermined threshold.
S2, adjust ultrasonic wave frequency, until by sounding face to the reflection of at least partly ultrasonic wave on the inside of sounding face
Form the standing-wave sound field focused.
Start after emitting ultrasonic wave, then gradually adjusts to the frequency of ultrasonic wave, it can be in sounding face by anti-
Until penetrating the standing-wave sound field to form focusing.Wherein, it is preferred that resonant frequency relevant to sounding face size is selected in the present embodiment
Ultrasonic wave as excitation ultrasonic wave (ultrasonic wave emitted).
In the present embodiment, the waveform of ultrasonic wave can be random waveform, for example, can be continuous wave, train of pulse wave.Its
In, when the waveform of ultrasonic wave is train of pulse wave, duty ratio can be any duty ratio.
S3, the intensity for adjusting ultrasonic wave, until causing cavitation in the focal regions region of standing-wave sound field.
After ultrasonic wave forms standing-wave sound field in sounding face, due to the static pressure of sound bearing medium and the frequency of ultrasonic wave
The intensity of limitation to cavitation threshold, ultrasonic wave at this time might not cause sky enough in the focal regions region of standing-wave sound field
Change.Therefore, in the present embodiment, it can ensure standing-wave sound field by adjusting the intensity (such as the intensity for increasing ultrasonic wave) of ultrasonic wave
Focal regions region in independently cause cavitation.Certainly, when emitting ultrasonic wave, it can also directly emit powerful ultrasonic wave, make
Its intensity causes cavitation enough, to simplify set-up procedure.
Further, after causing cavitation, the subsequent intensity that can also continue to adjustment ultrasonic wave, to change cavitation
Intensity, and then different size of superelevation acoustic pressure is generated in the focal regions position of standing-wave sound field.Specifically, can pass through in the present embodiment
The electrical power (such as output power of high-power driving power supply) of phonation unit is adjusted to adjust the intensity of ultrasonic wave, so as to adjust
The severe degree of cavitation.
Preferably, in practical applications, the transmitting that can control ultrasonic wave according to demand is held time, to control focal regions
Region generates the time of cavitation namely the duration of superelevation acoustic pressure.Specifically, can be occurred by control in the present embodiment
The working time of unit realizes the control of the duration to superelevation acoustic pressure.
In the present embodiment, it is preferred that the shape of sounding face is spherical surface, cylindrical surface, any one in truncated-spherical.That is,
The shape of the shell of ultrasonic transducer can be spherical shell shape, cylinder or interception hull shape, and focal regions position is located at sphere center position
(or center of cylinder).Wherein, the shell of interception hull shape should include sphere center position (centre of sphere is located in spherical segment).Tool
Body, the shape of shell can be billiard table shape, such as cydariform.It in practical applications, can also be other shapes, it is not another herein
One enumerates.For example, as shown in figure 3, the ultrasonic wave that phonation unit issues penetrates ultrasound when the shell of ultrasonic transducer is spherical
The shell of energy converter propagates to sphere center position O by the inner surface of ultrasonic transducer shell, resumes by sphere center position O is subsequent
It casts on the inner surface of ultrasonic transducer shell, then inner surface through ultrasonic transducer shell reflects to form back wave.When super
When sonic transducer shell and ultrasonic wave meet resonance condition, i.e., when the inner surface of ultrasonic transducer shell forms resonant cavity, the centre of sphere
The ultrasonic wave directly focused at the O of position is identical with the phase of back wave, and sound wave coherent superposition can be formed at sphere center position O,
So that forming the very high stable spherical standing-wave sound field of intensity in resonant cavity, and reach high sound pressure at sphere center position O, to improve
The acoustic pressures of focal regions, and then cause cavitation.Meanwhile centre of sphere O is in spherical standing-wave sound field center, what is be subject to is each to acoustic radiation force
Central symmetry, to clamping down on cavitation bubble group at the centre of sphere (focal regions).
It is provided in this embodiment generate superelevation acoustic pressure method in, using ultrasonic wave transmitting and reflect to form standing wave sound
, and independently cause cavitation in the focal regions of standing-wave sound field, it is more than or equal to 10 so as to be formed9The superelevation sound of Pa magnitude
Pressure, meanwhile, it is acted on by cavitation scope limitation within the scope of focal regions using the sound tweezer of standing-wave sound field, to effectively control cavitation model
It encloses, and then facilitates the effective use to superelevation acoustic pressure caused by cavitation.It, can be by controlling static pressure also, in the present embodiment
Size and ultrasonic wave intensity, hold time, realize to the space (range) of cavitation, intensity and duration into one
Step control.
Embodiment 2:
As shown in figure 4, the present embodiment provides a kind of superelevation acoustic pressure generation device, it can be according to the generation of the offer of embodiment 1
The method of superelevation acoustic pressure forms high sound pressure.The superelevation acoustic pressure generation device includes: sound bearing medium housing unit 1, is passed for accommodating
Acoustic medium；Phonation unit in sound bearing medium housing unit 1, with sounding face.Phonation unit is for passing through sounding face
The ultrasonic wave of transmitting focusing；Reflection at least partly ultrasonic wave, so that the ultrasonic wave of transmitting and the ultrasonic wave of reflection are in sounding face
Form the standing-wave sound field focused；And cavitation can be caused in the focal regions region of standing-wave sound field, it is collapsed by cavitation bubble and generates superelevation
Acoustic pressure.
That is, in the superelevation acoustic pressure generation device of the present embodiment, the sounding face of phonation unit can emit, reflectance ultrasound
Wave, and by the restriction to its material, size, the range (including features such as frequency, intensity) etc. that ultrasonic wave can be emitted, finally
Certifiable ultrasonic wave can form standing-wave sound field in sounding face, and can generate cavitation, generate to be collapsed by cavitation bubble
Superelevation acoustic pressure.
Specifically, sounding face can for ultrasonic transducer 18 shell inner surface, shape can for spherical surface, cylindrical surface,
Any one in truncated-spherical, that is, the shape of the shell of ultrasonic transducer 18 can be spherical shell shape, cylinder or interception
Hull shape, focal regions position are located at sphere center position (or center of cylinder).Wherein, the shell of interception hull shape should include the centre of sphere
Position (centre of sphere is located in spherical segment).
Phonation unit can be the device that can produce ultrasonic wave that 18 housing outer surface of ultrasonic transducer is arranged in, such as piezoelectricity
Ceramics or 1-3 type piezo-electricity composite material etc..
Sound bearing medium housing unit 1 can be hyperbaric chamber, inside can accommodate the sound bearing medium with higher static pressure.Ultrasound is changed
Energy device 18 can be put into hyperbaric chamber by quick operating valve 16, be placed in mounting seat 15, phonation unit is by being mounted on air plug method
Cable resistance to compression adapter 6 on blue disk 5 is connect with large power supply 8.Meanwhile in 18 enclosure interior of ultrasonic transducer and hyperbaric chamber
Portion's connection, to enable sound bearing medium of the enclosure interior filled with higher static pressure.Wherein, it is preferred that sound bearing medium can be
Ion de aerated water.
In the present embodiment, the ultrasonic wave that phonation unit (not shown) issues can penetrate the shell of ultrasonic transducer 18
Body is issued from the inner surface of shell, and is transmitted in shell by sound bearing medium, can be occurred after encountering sounding face anti-
It penetrates, finally, the ultrasonic wave and the ultrasonic wave after reflection of phonation unit sending form standing-wave sound field inside housings, and in focal regions area
Domain focuses.Wherein, the intensity of the ultrasonic wave emitted in the present embodiment independently should cause cavitation in focal regions region enough, enable transaudient
Medium forms cavitation bubble group in focal regions region, and under the action of the ultrasonic wave of alternation, cavitation bubble group slowly expands downwards in negative pressure,
Collapse is sharply shunk downwards in positive pressure, so as to form the environment of high temperature and pressure in focal regions region；Also, in the present embodiment, by
It is acted in " the sound tweezer " of standing-wave sound field, cavitation bubble group caused by cavitation can be clamped down on, be always positioned at cavitation bubble group
Within the scope of focal regions, to realize effective control to cavitation range, and then help to have superelevation acoustic pressure caused by cavitation
Effect utilizes, to generate the superelevation acoustic pressure of range-controllable in focal regions.
Preferably, superelevation acoustic pressure generation device further include: purifier 10 can be intake by water inlet line and hyperbaric chamber
Interface 13 connects, and provides deionization de aerated water for hyperbaric chamber, using as sound bearing medium.
Preferably, superelevation acoustic pressure generation device further includes presser unit 9, for the static pressure of sound bearing medium to be at least forced into
Predetermined threshold.The range size of cavitation threshold and cavitation zone is related with environmental stress (static pressure of sound bearing medium).The increasing of static pressure
The generation of conference suppression cavitation improves cavitation threshold, at this time, it may be necessary to the ultrasonic wave of higher intensity ensures the generation of cavitation, therefore
In this case, the intensity of the cavitation of generation is also bigger, namely the super high sound pressure levels that can be finally formed are also higher.Meanwhile
With the increase of the static pressure of sound bearing medium, the range of cavitation zone can exponentially form be gradually reduced.That is, passing through promotion
High-intensitive cavitation can be limited within small range by the static pressure of sound bearing medium, such as the cavitation that will cause in focal regions region
Scope limitation ultrasonic wave wave-length coverage (i.e. the range of cavitation in any direction on size be less than or equal to ultrasonic wave
Wavelength) in, so as to realize small-scale superelevation acoustic pressure, and then improve the precision of the generation range of ultrasonic acoustic pressure.
Specifically, the water inlet pipe of presser unit 9 is connected with the pressure tank in purifier 10, High Pressure Drain mouth and high pressure
Cabin is connected by solenoid valve 11, by the control software of presser unit 9, is filled the water and is pressurized to hyperbaric chamber, when the hydrostatic in hyperbaric chamber
When pressure increases to static pressure (i.e. the predetermined threshold) of setting, by the feedback of pressure transducer, presser unit 9 stops water inlet.Its
In, presser unit 9 further includes pressure gauge 2, for showing current static pressure.Wherein, in pressurization initial stage, the row of openable hyperbaric chamber
Air valve then closes exhaust valve to exclude the intracorporal gas in cabin.
Superelevation acoustic pressure generation device provided in this embodiment is formed in the shell of ultrasonic transducer 18 using ultrasonic wave and is stayed
Wave sound field, and independently cause cavitation in the focal regions of standing-wave sound field, it is more than or equal to 10 so as to be formed9The superelevation of Pa magnitude
Acoustic pressure, meanwhile, it is acted on by cavitation scope limitation within the scope of focal regions using the sound tweezer of standing-wave sound field, to effectively control cavitation model
It encloses, and then facilitates the effective use to superelevation acoustic pressure caused by cavitation.It, can be by controlling static pressure also, in the present embodiment
Size and ultrasonic wave intensity, hold time, realize further control to the space of cavitation, intensity and duration
System.
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 (13)
1. a kind of method for generating superelevation acoustic pressure characterized by comprising
Ultrasonic wave by the sounding face transmitting focusing being set in sound bearing medium, sounding face reflection at least partly ultrasonic wave are described
The ultrasonic wave of transmitting and the ultrasonic wave of reflection form the standing-wave sound field of focusing on the inside of sounding face；In the focal regions region of standing-wave sound field
Interior initiation cavitation, cavitation bubble collapse generate superelevation acoustic pressure.
2. the method according to claim 1 for generating superelevation acoustic pressure, which is characterized in that
It is described by be set to sound bearing medium in sounding face transmitting focusing ultrasonic wave the step of before further include: by sound bearing medium
Static pressure be at least forced into predetermined threshold.
3. the method according to claim 2 for generating superelevation acoustic pressure, which is characterized in that
The predetermined threshold is 8MPa.
4. the method according to claim 2 for generating superelevation acoustic pressure, which is characterized in that described by being set in sound bearing medium
Sounding face transmitting focusing ultrasonic wave the step of specifically include:
Start the ultrasonic wave of transmitting focusing with first frequency by the sounding face in sound bearing medium；
The frequency of the ultrasonic wave is adjusted, until the ultrasonic wave of the transmitting and the ultrasonic wave of reflection form on the inside of sounding face and gather
Burnt standing-wave sound field.
5. the method according to claim 4 for generating superelevation acoustic pressure, which is characterized in that the focal regions area in standing-wave sound field
Cause cavitation in domain to specifically include:
The intensity of the ultrasonic wave is adjusted, to cause cavitation in the focal regions region of standing-wave sound field.
6. the method according to claim 1 for generating superelevation acoustic pressure, which is characterized in that
The superelevation acoustic pressure that cavitation bubble generates when collapsing is more than or equal to 109Pa。
7. the method according to claim 1 for generating superelevation acoustic pressure, which is characterized in that
In focal regions region cause cavitation range in any direction on size be less than or equal to ultrasonic wave wavelength.
8. the method according to claim 1 for generating superelevation acoustic pressure, which is characterized in that
The waveform of the ultrasonic wave is one of continuous wave, train of pulse wave.
9. the method according to claim 1 for generating superelevation acoustic pressure, which is characterized in that
The sound bearing medium includes deionization de aerated water.
10. the method according to claim 1 for generating superelevation acoustic pressure, which is characterized in that
The shape of the sounding face is spherical surface, cylindrical surface, any one in truncated-spherical.
11. a kind of superelevation acoustic pressure generation device characterized by comprising
Sound bearing medium housing unit, for accommodating sound bearing medium；
Phonation unit in sound bearing medium housing unit, with sounding face, the phonation unit is for passing through sounding face
The ultrasonic wave of transmitting focusing, sounding face can reflect at least partly ultrasonic wave, so that the ultrasound of the ultrasonic wave of the transmitting and reflection
Wave forms the standing-wave sound field of focusing on the inside of sounding face, and causes cavitation in the focal regions region of standing-wave sound field, passes through cavitation bubble
Collapse generates superelevation acoustic pressure.
12. superelevation acoustic pressure generation device according to claim 11, which is characterized in that
The sound bearing medium housing unit is hyperbaric chamber.
13. superelevation acoustic pressure generation device according to claim 11, which is characterized in that
Further include: presser unit, for the static pressure of sound bearing medium to be at least forced into predetermined threshold.
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| CN113263182A (en) * | 2021-05-20 | 2021-08-17 | 杭州电子科技大学 | Method and equipment for forming fixed-point acoustic cavitation of inner cavity of metal liquid drop |
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