CN117023702A - Ultrasonic liquid inactivation method based on phased array - Google Patents
Ultrasonic liquid inactivation method based on phased array Download PDFInfo
- Publication number
- CN117023702A CN117023702A CN202311251879.2A CN202311251879A CN117023702A CN 117023702 A CN117023702 A CN 117023702A CN 202311251879 A CN202311251879 A CN 202311251879A CN 117023702 A CN117023702 A CN 117023702A
- Authority
- CN
- China
- Prior art keywords
- ultrasonic
- probe array
- target area
- array element
- inactivation method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 230000002779 inactivation Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000000523 sample Substances 0.000 claims abstract description 87
- 238000004140 cleaning Methods 0.000 claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 4
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000000415 inactivating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 18
- 230000001580 bacterial effect Effects 0.000 abstract description 7
- 244000005700 microbiome Species 0.000 abstract description 7
- 239000002351 wastewater Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 238000000527 sonication Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The ultrasonic liquid inactivation method based on the phased array firstly sets a group of probe array elements on a drainage pipeline corresponding to a target area (an area for liquid inactivation) to form an ultrasonic phased array, then sets different groups of delay values corresponding to different cleaning points in the target area so as to change the emission time of each probe array element, finally enables an ultrasonic generator to emit pulse signals according to the corresponding delay values, and excites each probe array element to emit ultrasonic waves, so that ultrasonic wave fronts form focusing at different cleaning points in the target area in sequence, and a scanning state is presented. According to the ultrasonic liquid inactivation method, controllable sound beam deflection and focusing are realized by changing the emission time of each probe array element, so that a target area can be scanned in a dynamic focusing deflection mode, the ultrasonic cavitation effect coverage is more comprehensive, the full coverage inactivation of liquid in the target area can be realized, and the removal efficiency and effect of bacterial microorganisms in the target area are improved.
Description
Technical Field
The application relates to the technical field of ultrasonic liquid inactivation, in particular to an ultrasonic liquid inactivation method based on a phased array.
Background
Biological laboratories play a great role in the development of medicine, but biological wastewater is generated in the experimental process, and contains a large amount of bacteria and viruses, and if the biological wastewater is discharged through a drainage pipeline without treatment, the surrounding ecological environment can be polluted, and the biological diversity can be seriously damaged, and even the human health can be endangered. Currently, both physical and chemical methods are mainly used to treat these discharged bacterial organisms. Physical sterilization methods have received considerable attention in recent years due to the high cost of production, short shelf life and risk of environmental pollution of the chemical agents used. Wherein, ultrasonic sterilization is to destroy bacteria such as pathogens and putrefying enzymes by utilizing shear force and impact force generated by ultrasonic cavitation; under the action of ultrasound, cavitation bubbles are formed in the liquid medium, and the micro bubbles undergo a series of dynamic processes such as oscillation, growth, shrinkage, collapse and the like, so that instantaneous high temperature and high pressure (high temperature above 5000 ℃ and pressure of 50000 kPa) are generated, so that certain bacteria in the liquid are killed, viruses are inactivated, and cell walls of some microorganisms with smaller volumes are even destroyed (i.e. inactivated). However, the cavitation effect of ultrasound alone is relatively weak and does not completely kill spoilage bacteria or enzymes in liquids, for which researchers have been exploring and improving sonication techniques. In the prior art, a transducer array is generally adopted, and parameters such as input signals, transducer power and the like are changed to optimize the distribution of ultrasonic cavitation areas in a drainage pipeline. However, since the vibration node is fixed in the use process of the transducer array, the amplitude of the cavitation effect at the node is zero, and the problem of insufficient coverage of a certain cavitation effect exists.
Disclosure of Invention
The application provides an ultrasonic liquid inactivation method based on a phased array, which is used for solving the problem that ultrasonic cavitation effect coverage in a drainage pipeline is incomplete in the prior art. According to the ultrasonic liquid inactivation method based on the phased array, the group of probe array elements are arranged on the drainage pipeline corresponding to the target area (the area for liquid inactivation), and then the different groups of delay values are arranged corresponding to different cleaning points in the target area, so that the emission time of each probe array element is changed, the target area can be scanned in a dynamic focusing deflection mode, the full coverage of cavitation effect of the target area is realized, the liquid in the target area can be subjected to full coverage inactivation, and the cleaning efficiency and effect of bacterial microorganisms in the target area are improved.
The technical scheme of the application is as follows:
an ultrasonic liquid inactivation method based on a phased array is characterized in that an area for liquid inactivation in a drainage pipeline is set as a target area, and n probe array elements are arranged on the outer wall of the drainage pipeline corresponding to the target area at intervals to form an ultrasonic phased array; the probe array elements are marked in sequence from No. 1 to No. n; the probe array element is connected with the ultrasonic generator;
the specific process of the ultrasonic liquid inactivation method is as follows: firstly, calculating delay values of different groups corresponding to different cleaning points in a target area so as to change the transmitting time of each probe array element; setting the delay value of the probe array element No. 1 to be 0 in each group, and respectively calculating the delay values of the probe array elements No. 2 to n relative to the probe array element No. 1; then, the ultrasonic generator transmits pulse signals according to a first group of delay values to excite each probe array element to transmit ultrasonic waves, the ultrasonic wave front forms focusing at a first cleaning point in the target area and works for T minutes, and liquid in the target area is inactivated; after T minutes, the ultrasonic generator transmits pulse signals according to a second group of delay values to excite each probe array element to transmit ultrasonic waves, and the ultrasonic wave front forms focusing at a second cleaning point in the target area and works for T minutes; the ultrasonic wave front is sequentially circulated, so that the ultrasonic wave front is focused at different cleaning points in the target area in sequence, the scanning state is presented, and the full-coverage inactivation of the liquid in the target area is realized.
Compared with the prior art, the ultrasonic liquid inactivation method based on the phased array firstly forms an ultrasonic phased array by arranging a group of probe array elements arranged according to a specific mode on the outer wall of a drainage pipeline corresponding to a target area (an area for liquid inactivation); setting delay values of different groups corresponding to different cleaning points in the target area so as to change the emission time of each probe array element (namely, control the phase difference among each probe array element) and realize controllable sound beam deflection and focusing; finally, the ultrasonic generator emits pulse signals according to the corresponding delay values, and each probe array element is stimulated to emit ultrasonic waves, so that ultrasonic wave fronts form focusing at different cleaning points in the target area in sequence, and the target area can be scanned in a dynamic focusing deflection mode (namely, different deflection focusing points are changed, so that the ultrasonic waves move in the corresponding target area), the ultrasonic cavitation effect coverage is more comprehensive, the full coverage inactivation of liquid in the target area can be realized, and the cleaning efficiency and effect of bacterial microorganisms in the target area are improved.
As optimization, in the phased array-based ultrasonic liquid inactivation method, different cleaning points in the target area are located on the same plane; the delay value tn=Δsn/c of the probe array elements from No. 2 to n relative to the probe array element No. 1, c is the sound velocity of the ultrasonic wave in the water, Δsn is the sound path difference of the probe array element No. n relative to the probe array element No. 1, and according to the formula Δsn=L1-Ln and Ln 2 ＝(md) 2 +L1 2 +2mdL1sin theta, wherein Ln is the distance from the n probe array elements to the cleaning point, L1 is the distance from the 1 probe array elements to the cleaning point, theta is the deflection angle of the ultrasonic beam central line, d is the central distance between two adjacent probe array elements, and m=n-1; the emission sound pressure of the probe array element is a modulated standard sine wave signal, V n ＝100×e (j×tn) 。
As optimization, in the ultrasonic liquid inactivation method based on the phased array, the deflection angle theta of the ultrasonic sound beam central line is less than or equal to 65 degrees. The larger the deflection angle is, the wider the coverage range of the ultrasonic cavitation effect is, but the smaller the sound pressure of the focusing point is, the weaker the inactivation effect is; after the limit deflection angle (maximum angle) is set to 65 degrees, the cleaning coverage can be wider on the premise of meeting the cleaning effect on bacterial microorganisms.
As optimization, in the phased array-based ultrasonic liquid inactivation method, the probe array element is a piezoelectric ceramic ultrasonic transducer; the piezoelectric ceramic ultrasonic transducers are arranged above the drainage pipeline and are arranged at equal intervals along the length direction of the drainage pipeline. At this time, the assembly is more convenient, and the piezoelectric ceramic ultrasonic transducer is arranged above the drainage pipeline, so that the piezoelectric ceramic ultrasonic transducer is not easy to fall off during vibration.
Further, the ultrasonic frequency emitted by the piezoelectric ceramic ultrasonic transducer can be 20kHz, and the intensity can be 0.3-0.5W/cm 2 . At the moment, the ultrasonic waves emitted by the piezoelectric ceramic ultrasonic transducer can effectively inactivate the liquid in the target area, and the cleaning effect on bacterial microorganisms in the liquid is good.
As an optimization, in the ultrasonic liquid inactivation method based on the phased array, the drainage pipeline outside the target area is a titanium alloy pipeline, the length of the drainage pipeline is 600mm, the wall thickness of the drainage pipeline is 3mm, and the outer diameter of the drainage pipeline is 120mm. Further, the number of the probe array elements is 3, and the interval between two adjacent probe array elements is 100mm; the probe number 2 array element corresponds to the midpoint position of the target area.
Drawings
FIG. 1 is a schematic diagram of a phased array based ultrasonic liquid inactivation method of the present application;
FIG. 2 is a diagram of the resonance state of a piezoelectric ceramic ultrasonic transducer in the present application;
FIG. 3 is a schematic diagram of the structure of an ultrasound phased array in the present application;
fig. 4 is a schematic view of an ultrasonic liquid inactivation device in accordance with the present application;
FIG. 5 is a schematic diagram of ultrasonic deflection focusing in the present application;
FIG. 6 is a schematic diagram showing the variation of the sound pressure magnitude of the focus point at different deflection angles;
fig. 7, 8, and 9 are graphs showing the effect of moving the sound pressure region in the drain pipe under finite element analysis.
Detailed Description
The application is further illustrated by the following description, taken in conjunction with the accompanying drawings and examples, which are provided solely for the purpose of illustrating the application and are not to be construed as limiting the application.
Examples (see fig. 1-9):
in this embodiment, firstly, a water area in a drain pipeline in which liquid inactivation is required is determined, the water area is taken as a target area, and then an ultrasonic liquid inactivation device is arranged in the target area. The ultrasonic liquid inactivating device comprises a titanium alloy pipeline arranged outside a target area, wherein 3 probe array elements are arranged above the outer wall of the titanium alloy pipeline at equal intervals along the length direction to form an ultrasonic phased array; the probe array element is connected with an ultrasonic generator (see fig. 3 and 4); the length of the titanium alloy pipeline is 600mm, the wall thickness is 3mm, and the outer diameter is 120mm; the 3 probe array elements are marked in sequence from No. 1 to No. 3; the probe array element No. 2 is arranged at the midpoint of the titanium alloy pipeline, and the interval between two adjacent probe array elements is 100mm.
Biological wastewater generated in the experimental process of the biological laboratory is discharged through a drainage pipeline; biological wastewater enters from the inlet of the drainage pipeline and then flows into the titanium alloy pipeline for ultrasonic liquid inactivation treatment, so that bacterial microorganisms in the biological wastewater are removed, and then the biological wastewater is discharged from the outlet of the drainage pipeline, and the surrounding ecological environment is not polluted.
Because the frequency of effective inactivation of ultrasonic wave is 20kHz and the intensity is 0.3-0.5W/cm 2 In this embodiment, the strength is 0.3-0.5W/cm 2 The 20KHz piezoelectric ceramic ultrasonic transducer is used as a probe array element. Referring to fig. 2, the resonance frequency of the selected 20KHz transducer was found to be approximately 21KHz by finite element software modal analysis.
The ultrasonic generator is a customized ultrasonic generator and has the function of controlling signal delay, and is used for generating alternating current pulse signals with specific frequency to excite each probe array element to emit ultrasonic waves; the ultrasonic wave emitted by the array element of the probe No. 1 is excited to be a standard sine wave signal: v (V) 1 ＝100×e (j×t1) The method comprises the steps of carrying out a first treatment on the surface of the Ultrasonic waves emitted by exciting the array element of the No. 2 probe are standard sine wave signals: v (V) 2 ＝100×e (j×t2) The method comprises the steps of carrying out a first treatment on the surface of the Ultrasonic waves emitted by exciting the array element of the probe No. 3 are standard sinusoidal signals: v (V) 3 ＝100×e (j×t3) . Where 100 is the amplitude value,
referring to fig. 1, the phased array-based ultrasonic liquid inactivation method of the application is realized by adopting the ultrasonic liquid inactivation device, and the specific process is as follows:
firstly, dividing a target area into a plurality of different cleaning points under the same plane; calculating delay values of different groups corresponding to different cleaning points; setting the delay value of the probe array element No. 1 as 0 in each group, and respectively calculating the delay value tn of the probe array elements No. 2 and No. 3 relative to the probe array element No. 1; tn=Δsn/c, Δsn is the difference in the sound path of the n probe array element relative to the 1 probe array element, according to the formula Δsn=l1-Ln and Ln 2 ＝(md) 2 +L1 2 +2×md×L1×sin θ, where c is the sound velocity of the ultrasonic wave in water, ln is the distance from the n probe array element to the cleaning point, L1 is the distance from the 1 probe array element to the cleaning point, θ is the deflection angle of the ultrasonic beam center line, d is the center-to-center distance between two adjacent probe array elements, and m=n-1;
then, the ultrasonic generator transmits pulse signals according to a first group of delay values to excite each probe array element to transmit ultrasonic waves, the ultrasonic wave front forms focusing at a first cleaning point in the target area and works for 10 minutes, and liquid in the target area is inactivated; after 10 minutes, the ultrasonic generator transmits pulse signals according to a second group of delay values to excite each probe array element to transmit ultrasonic waves, and the ultrasonic wave front forms focusing at a second cleaning point in the target area and works for 10 minutes; and the ultrasonic wave fronts sequentially circulate to form focusing at different cleaning points in the target area, and the ultrasonic wave fronts are in a scanning state so as to realize full-coverage inactivation of liquid in the target area.
Calculation of delay value of each group referring specifically to fig. 5, taking the 1 st probe array element as 0 delay value, then V 1 ＝100×e (j×0) The method comprises the steps of carrying out a first treatment on the surface of the For probe number 3 array elements there are in the geometric triangle OFA: oa=2d; triangle transformation with FA according to cosine theorem 2 ＝(2d) 2 +FO 2 +2 x (2 d) x FO x sin θ, where FA is Ln, FO is L1; the difference in the acoustic path between the probe No. 3 array element and the probe No. 1 array element is: Δs3=fo-FA; from this, can obtain the delay value t3 of probe array element No. 3 relative to probe array element No. 1 as: t3=Δs3/c. The same applies to the probe 1 and the probe 2 array elementThe delay value t2 of the array element is as follows: t2=Δs2/c. Then substituting the obtained t2 and t3 into V 2 、V 3 The delay signals of the three probe array elements at the focusing point F can be obtained.
In the application, corresponding to different cleaning points, different groups of delay values are set; in each group, the delay value of the probe array element No. 1 is 0, and the probe array elements No. 2 and No. 3 are delayed relative to the probe array element No. 1; the time interval between two adjacent focus points is 10 minutes.
Before a specific experiment, finite element software is adopted to simulate the sound pressure distribution in a titanium alloy pipeline under an ultrasonic phased array, and the sound pressure in the pipeline is related to cavitation possibly generated by comparing the sound pressure distribution with a pressure threshold required by cavitation. After the simulation results are collated, the sound pressure of the focusing point is changed under different deflection angles, and as shown in fig. 6, the larger the deflection angle is, the smaller the sound pressure of the focusing point is. According to the principle of an ultrasonic phased array, changing each parameter of the ultrasonic transducers which are linearly arranged, and having certain influence on deflection focusing of ultrasonic sound beams; therefore, in order to achieve better liquid inactivation and to have wider coverage of ultrasonic cavitation, the limiting deflection angle is set to 65 ° (it can be seen from fig. 6 that when θ is less than or equal to 65 °, the pressure exceeds the cavitation threshold, i.e., effective ultrasonic liquid inactivation can be performed at these points).
By combining the parameters of the limit deflection angle, the applicant designs a liquid inactivation effect simulation test under an ultrasonic phased array, and controls a delay signal through an ultrasonic generator to dynamically focus an ultrasonic wave front in a target area, wherein the simulation effect is shown in figures 7, 8 and 9. As can be seen from the figure, the phase difference between the probe array elements is controlled (namely, the emission time of each probe array element is changed), the aggregation area of sound pressure moves from the middle to the right 257.5mm area in the titanium alloy pipeline, and the aggregation area is the same as the left because of the symmetrical structure; therefore, the whole ultrasonic liquid inactivation method can realize the movement of sound pressure in a 515mm area, and the ultrasonic liquid inactivation method based on the phased array has the advantage that the effect of comprehensively inactivating the liquid in the designated target area is achieved.
The above general description of the application and the description of specific embodiments thereof in relation to the present application should not be construed as limiting the scope of the application. Those skilled in the art can add, subtract or combine the features disclosed in the foregoing general description and/or the detailed description (including examples) to form other technical solutions within the scope of the application without departing from the disclosure of the application.
Claims (9)
1. The ultrasonic liquid inactivation method based on the phased array is characterized by comprising the following steps of:
setting a region for inactivating liquid in a drainage pipeline as a target region, and arranging n probe array elements on the outer wall of the drainage pipeline corresponding to the target region at intervals to form an ultrasonic phased array; the probe array elements are marked in sequence from No. 1 to No. n; the probe array element is connected with the ultrasonic generator;
the specific process of the ultrasonic liquid inactivation method is as follows: firstly, calculating delay values of different groups corresponding to different cleaning points in a target area so as to change the transmitting time of each probe array element; setting the delay value of the probe array element No. 1 to be 0 in each group, and respectively calculating the delay values of the probe array elements No. 2 to n relative to the probe array element No. 1; then, the ultrasonic generator transmits pulse signals according to a first group of delay values to excite each probe array element to transmit ultrasonic waves, the ultrasonic wave front forms focusing at a first cleaning point in the target area and works for T minutes, and liquid in the target area is inactivated; after T minutes, the ultrasonic generator transmits pulse signals according to a second group of delay values to excite each probe array element to transmit ultrasonic waves, and the ultrasonic wave front forms focusing at a second cleaning point in the target area and works for T minutes; and the ultrasonic wave fronts sequentially circulate to form focusing at different cleaning points in the target area, and the ultrasonic wave fronts are in a scanning state so as to realize full-coverage inactivation of liquid in the target area.
2. The phased array based ultrasonic liquid inactivation method of claim 1, wherein: the target isDifferent cleaning points in the area are positioned under the same plane; the delay value tn=Δsn/c of the probe array elements from No. 2 to n relative to the probe array element No. 1, c is the sound velocity of the ultrasonic wave in the water, Δsn is the sound path difference of the probe array element No. n relative to the probe array element No. 1, and according to the formula Δsn=L1-Ln and Ln 2 ＝(md) 2 +L1 2 And +2×md×L1×sin θ is calculated, where Ln is the distance from the n probe array elements to the cleaning point, L1 is the distance from the 1 probe array elements to the cleaning point, θ is the deflection angle of the ultrasonic beam center line, d is the center-to-center distance between two adjacent probe array elements, and m=n-1.
3. The phased array based ultrasonic liquid inactivation method of claim 2, wherein: the emission sound pressure of the probe array element is a modulated standard sine wave signal, V n ＝100×e (j×tn) 。
4. The phased array based ultrasonic liquid inactivation method of claim 2, wherein: the deflection angle theta of the ultrasonic sound beam central line is less than or equal to 65 degrees.
5. A phased array based ultrasonic liquid inactivation method of claim 3, wherein: the probe array elements are arranged above the drainage pipeline and are arranged at equal intervals along the length direction of the drainage pipeline.
6. The phased array based ultrasonic liquid inactivation method of claim 5, wherein: the probe array element is a piezoelectric ceramic ultrasonic transducer.
7. The phased array based ultrasonic liquid inactivation method of claim 6, wherein: the ultrasonic frequency emitted by the piezoelectric ceramic ultrasonic transducer is 20kHz, and the intensity is 0.3-0.5W/cm 2 。
8. The phased array based ultrasonic liquid inactivation method of claim 5, wherein: the drainage pipeline outside the target area is a titanium alloy pipeline, the length of the drainage pipeline is 600mm, the wall thickness of the drainage pipeline is 3mm, and the outer diameter of the drainage pipeline is 120mm.
9. The phased array based ultrasonic liquid inactivation method of claim 8, wherein: the number of the probe array elements is 3, and the interval between two adjacent probe array elements is 100mm; wherein, no. 2 probe array elements locate the midpoint position of titanium alloy pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311251879.2A CN117023702A (en) | 2023-09-26 | 2023-09-26 | Ultrasonic liquid inactivation method based on phased array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311251879.2A CN117023702A (en) | 2023-09-26 | 2023-09-26 | Ultrasonic liquid inactivation method based on phased array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117023702A true CN117023702A (en) | 2023-11-10 |
Family
ID=88628499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311251879.2A Pending CN117023702A (en) | 2023-09-26 | 2023-09-26 | Ultrasonic liquid inactivation method based on phased array |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117023702A (en) |
-
2023
- 2023-09-26 CN CN202311251879.2A patent/CN117023702A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Charoux et al. | Applications of airborne ultrasonic technology in the food industry | |
| US6699711B1 (en) | Device and method for selective exposure of a biological sample to sound waves | |
| US11224901B2 (en) | System and a method for cleaning of a device | |
| JP5775929B2 (en) | Ultrasonic transducer for selectively generating ultrasonic and heat | |
| CN103118776B (en) | Method for ultrasonic cavitation treatment of liquid media | |
| Inaba et al. | Ultrasonic coagulation of large tissue region by generating multiple cavitation clouds in direction perpendicular to ultrasound propagation | |
| CN103280213B (en) | Turbulence resonance fluid sounder | |
| CN111495455A (en) | Non-contact ultrasonic liquid transfer device and method | |
| Lim et al. | A one-sided acoustic trap for cell immobilization using 30-MHz array transducer | |
| CN117023702A (en) | Ultrasonic liquid inactivation method based on phased array | |
| CN104645916B (en) | A kind of near sound field ultrasound reactor | |
| Mustonen et al. | FEM-based time-reversal enhanced ultrasonic cleaning | |
| CN204824257U (en) | High -efficient continuous type mixing supersound cell broken wall processing apparatus | |
| Wang et al. | Simulation and experimental investigation of an ultrasound system with cavitation in concentric zone | |
| CN115999082A (en) | Ultrasonic treatment equipment | |
| CN104944515B (en) | A kind of highly effective continuous frequency mixing ultrasonic breaking-wall cell processing unit | |
| JP2015223109A (en) | Ultrasonic irradiation device | |
| JP2012239928A (en) | Ultrasonic fluid activation apparatus | |
| RU132000U1 (en) | ULTRASONIC VIBRATION SYSTEM FOR GAS MEDIA | |
| CN113058834B (en) | Double-frequency focusing transducer for biological sample pretreatment and driving method thereof | |
| RU2540608C1 (en) | Method for ultrasonic cavitational processing of liquid media | |
| Dev et al. | Design of a scalable DNA shearing system using phased-array ultrasonic transducer | |
| KR200272091Y1 (en) | Ultrasonic cleaning apparatus | |
| Osman | Ultrasonic disinfection using large area compact radial mode resonators | |
| Yin et al. | An ultrasonic biosample disruptor with two triangular teeth on its radiation face |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |