Experimental device and experimental method for researching ultrasonic bubble dynamics

Abstract

The invention relates to an experimental device and an experimental method for researching ultrasonic bubble dynamics, belongs to the technical field of ultrasonic bubble dynamics, and solves the problem that an ultrasonic bubble dynamic process is difficult to comprehensively observe and accurately simulate in a laboratory in the prior art. The experimental device comprises an ultrasonic generator, an experimental water tank and the like, a probe is arranged through a fixing device, and all parts collect data cooperatively. The experimental method comprises the steps of fixing the probe, generating ultrasonic waves and collecting data, moving the probe to repeat the experiment, carrying out numerical simulation, observing the damaged paint coating and the like. According to the method, multi-dimensional data of the bubbles can be comprehensively obtained, theoretical simulation is combined, high-cost testing is avoided, the period is shortened, accuracy and economical efficiency are improved, powerful support is provided for development of related fields of the ultrasonic technology, and understanding of interaction of the ultrasonic bubbles and the solid surface can be deepened from the micro level.

Description

Technical Field

[0001] The invention relates to an experimental device and an experimental method for studying ultrasonic bubble dynamics, belonging to the technical field of ultrasonic bubble dynamics. Background Art

[0002] Ultrasonic bubble dynamics mainly studies the dynamic process of bubble generation, expansion, contraction and rupture in liquid under the action of ultrasound. The behavior of ultrasonic bubbles is affected by many factors, such as the frequency and power of ultrasound, the physical properties of the liquid and the initial size of the bubble. This phenomenon has wide applications in many fields, such as sonochemistry, medical ultrasound angiography, ultrasonic cleaning and tissue ablation therapy. However, due to the small size and high-frequency motion characteristics of ultrasonic bubbles, studying their dynamic process often faces great challenges.

[0003] At present, most studies on ultrasonic bubble dynamics rely on a combination of experimental observation and theoretical simulation. Existing experimental devices usually have difficulty in comprehensively collecting multi-dimensional data on bubble motion during dynamic processes, especially key parameters such as the spatial distribution of bubble groups and pressure changes in the ultrasonic field, which limits the precise understanding of bubble behavior. In terms of theoretical research, although there are numerical models that attempt to simulate the evolution and interaction of bubble interfaces, there are still bottlenecks in the nonlinear motion of bubbles and the complex fluid coupling between bubble groups. This makes it difficult for existing technologies to fully and accurately reveal the dynamic characteristics and evolution mechanism of ultrasonic bubbles.

[0004] Therefore, there is an urgent need for a method that can achieve efficient and accurate research on ultrasonic bubble dynamics in a laboratory environment. By optimizing the configuration of experimental equipment and combining advanced numerical simulation technology, accurate observation and analysis of bubble generation, movement and interaction processes can be achieved. This will provide a new means for a deeper understanding of the dynamic behavior of ultrasonic bubbles and promote the further development of ultrasonic technology in various application fields. Summary of the invention

[0005] The present invention proposes an experimental device and an experimental method for studying ultrasonic bubble dynamics. By using a combination of professional equipment including an ultrasonic generator, an experimental water tank, a sound wave receiving system, a fixing device, a signal amplifier and an oscilloscope, and following a specific experimental step operation process, the present invention solves the problem that the prior art is difficult to comprehensively observe and accurately simulate the bubble dynamic process in a laboratory environment, and the problem that the study of the dynamic process of ultrasonic bubbles faces great challenges due to their tiny size and high-frequency motion characteristics.

[0006] The invention discloses an experimental device for studying ultrasonic bubble dynamics. The experimental device for studying ultrasonic bubble dynamics comprises an ultrasonic generator, an experimental water cylinder, a sound wave receiving system, a fixing device, a signal amplifier and an oscilloscope. The experimental water cylinder contains liquid and a paint coating is arranged on the cylinder bottom. The ultrasonic generator and the probes of the sound wave receiving system are arranged below the liquid surface through the fixing device. The probe of the sound wave receiving system surrounds the ultrasonic generator probe. The signal output end of the probe of the sound wave receiving system is connected to the signal input end of the signal amplifier. The signal output end of the signal amplifier is connected to the signal input end of the oscilloscope. A high-speed camera is arranged outside the experimental water cylinder, and the lens faces the area between the probe of the ultrasonic generator and the paint coating.

[0007] Further, an ultrasonic generator is used to generate ultrasonic waves of specific frequency and intensity, and transmit the ultrasonic waves into the liquid in the experimental water tank through the ultrasonic generator probe;

[0008] The experimental water tank is used to contain the liquid required for the experiment and provide a stable environment for ultrasonic waves to propagate and generate bubbles;

[0009] The sound wave receiving system is used to receive the sound signal generated by the ultrasonic wave propagating in the liquid in the experimental water tank, convert the sound signal into an electrical signal, and transmit the electrical signal to the signal amplifier for amplification processing;

[0010] A fixing device, used for fixing the position of the ultrasonic generator probe and the sound wave receiving system probe;

[0011] The signal amplifier is used to amplify the weak electrical signal transmitted by the sound wave receiving system, so that the signal strength reaches the range that the oscilloscope can accurately measure and display, and transmit the amplified electrical signal to the oscilloscope;

[0012] Oscilloscope, used to display and record the waveform of the electrical signal after being amplified by the signal amplifier;

[0013] A high-speed camera is used to capture dynamic image information of the bubble group in the experimental water tank from outside the water tank.

[0014] An experimental method for studying ultrasonic bubble dynamics, based on the above-mentioned experimental device for studying ultrasonic bubble dynamics, the experimental method for studying ultrasonic bubble dynamics includes the following steps:

[0015] S100, using a fixing device, firmly setting the probe of the ultrasonic generator at a preset depth below the liquid surface, and firmly setting the probe of the sound wave receiving system around the probe of the ultrasonic generator;

[0016] S200, generating ultrasonic waves through an ultrasonic generator, reading oscilloscope data to obtain ultrasonic field parameters, and simultaneously using a high-speed camera to capture bubble group images to obtain bubble group parameters;

[0017] S300, moving the position of the hydrophone probe, and repeating S100-S200 until the complete ultrasonic field parameters and bubble group parameters around the ultrasonic generator probe are obtained;

[0018] S400, using the boundary element model based on potential flow theory to perform numerical simulation and analyze the dynamic characteristics of bubble generation, movement and interaction under the action of ultrasound.

[0019] Furthermore, S200 includes the following steps:

[0020] S210, the oscilloscope converts the amplified electrical signal into a pressure signal and displays it for subsequent use;

[0021] S220, selecting a portion of clear and easy-to-observe frame segments in the bubble group image, reading and calculating parameters such as the bubble group density, bubble pulsation period, and bubble maximum radius.

[0022] Furthermore, in S220, PCC3.8 software is used for operation.

[0023] Furthermore, in S400, a boundary element model is used for numerical simulation.

[0024] Assuming that the fluid in the computational domain is inviscid and irrotational, there is a velocity potential The Laplace equation is satisfied in the flow field outside the bubble:

[0025]

[0026] The boundary integral equation is further obtained according to Green's formula, that is, the function value at any point in the basin is expressed by the value on the boundary and the normal derivative:

[0027]

[0028] Where r represents the flow control point, q represents the boundary integration point, S represents the boundary surface, λ is the solid angle of the flow field observed at point r, n is the normal vector on the boundary, with the normal vector pointing outside the flow field being positive, and G is the Green function G(p,q)=|pq -1 ,

[0029] In the boundary element method, the function value at any point in the flow field is represented by a distributed source:

[0030]

[0031] In the formula, σ represents the distribution source density on the boundary of the flow field. When the velocity potential of the bubble surface is known, the control points are arranged on the bubble surface. The distribution source density σ is solved by the above formula, and the auxiliary function method is used to calculate the distribution source density in the flow field. Item, and then obtain the induced pressure of the bubble in the flow field,

[0032] Since the probe of the ultrasonic generator is forced to vibrate in the flow field, its amplitude A is captured by a high-speed camera, and its frequency w has been calibrated on the ultrasonic instrument, the motion equation of the ultrasonic generator probe in the flow field is obtained as follows:

[0033] w(t)=Asin(wt) (4)

[0034] w is the motion displacement of the ultrasonic generator probe at time t, and the velocity of the ultrasonic generator probe at this time is Awcos(wt). Therefore, the displacement and velocity of the ultrasonic generator probe at time t are obtained. The indirect boundary element method is used to update the flow field and bubble velocity potential at time t, and then the Bernoulli equation is used to solve the flow field pressure.

[0035] A storage medium stores a computer program, which implements the above-mentioned experimental method for studying ultrasonic bubble dynamics when executed by a processor.

[0036] A computer device comprises: a memory, a processor and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the above-mentioned experimental method for studying ultrasonic bubble dynamics.

[0037] Beneficial effects of the present invention: The experimental device and experimental method for studying ultrasonic bubble dynamics of the present invention effectively overcome the limitations of the prior art in comprehensively observing and accurately simulating the dynamic process of bubbles in a laboratory environment. On the one hand, it is possible to accurately collect multi-dimensional data on the generation, movement and interaction of bubbles under the action of ultrasound, such as using a combination of professional equipment to achieve comprehensive acquisition of ultrasonic field parameters and bubble group parameters, and accurately calculate bubble-related physical parameters through high-speed cameras and image analysis software. On the other hand, combined with theoretical simulation, an efficient, economical and accurate research model has been established, which not only reduces the need for high-cost on-site testing, but also significantly shortens the research cycle, improves the accuracy of the experiment, and provides a powerful means for the study of ultrasonic bubble dynamics, which has strongly promoted the further development of ultrasonic technology in many fields such as sonochemistry, medical ultrasound angiography, ultrasonic cleaning and tissue ablation therapy. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 The present invention is a schematic structural diagram of an experimental water tank portion of an experimental device for studying ultrasonic bubble dynamics. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Reference Figure 1 As shown, an experimental device for studying ultrasonic bubble dynamics includes an ultrasonic generator, an experimental water tank, a sound wave receiving system, a fixing device, a signal amplifier and an oscilloscope. The experimental water tank contains liquid and a paint coating is arranged on the bottom of the tank. The ultrasonic generator and the probes of the sound wave receiving system are arranged below the liquid surface through the fixing device. The probe of the sound wave receiving system surrounds the ultrasonic generator probe. The signal output end of the probe of the sound wave receiving system is connected to the signal input end of the signal amplifier. The signal output end of the signal amplifier is connected to the signal input end of the oscilloscope. A high-speed camera is arranged outside the experimental water tank, and the lens faces the area between the probe of the ultrasonic generator and the paint coating.

[0041] Specifically, refer to Figure 1 The experimental device of the present invention shown in the figure can accurately detect the propagation of ultrasonic waves in liquids and bubble-related information by reasonably setting the probes of the ultrasonic generator and the sound wave receiving system (hydrophone) below the liquid surface through a fixing device, and the hydrophone probe surrounds the ultrasonic generator probe. The experimental water cylinder contains liquid and is provided with a paint coating, which provides a stable environment for the generation and movement of bubbles while facilitating observation. The connection of the sound wave receiving system, the signal amplifier and the oscilloscope can effectively process and display the sound signal and obtain the ultrasonic field parameters. The high-speed camera is set outside the water cylinder and faces a specific area, which can clearly capture the image of the bubble group, and then calculate the parameters such as the bubble group density, pulsation period and maximum radius. The overall device realizes the comprehensive collection of multi-dimensional data of ultrasonic bubble dynamics, overcomes the limitation that the existing technology is difficult to observe comprehensively, avoids high-cost actual environment testing, shortens the test cycle, and improves the accuracy and economy of research.

[0042] Further, an ultrasonic generator is used to generate ultrasonic waves of specific frequency and intensity, and transmit the ultrasonic waves into the liquid in the experimental water tank through the ultrasonic generator probe;

[0043] The experimental water tank is used to contain the liquid required for the experiment and provide a stable environment for ultrasonic waves to propagate and generate bubbles;

[0044] The sound wave receiving system is used to receive the sound signal generated by the ultrasonic wave propagating in the liquid in the experimental water tank, convert the sound signal into an electrical signal, and transmit the electrical signal to the signal amplifier for amplification processing;

[0045] A fixing device, used for fixing the position of the ultrasonic generator probe and the sound wave receiving system probe;

[0046] The signal amplifier is used to amplify the weak electrical signal transmitted by the sound wave receiving system, so that the signal strength reaches the range that the oscilloscope can accurately measure and display, and transmit the amplified electrical signal to the oscilloscope;

[0047] Oscilloscope, used to display and record the waveform of the electrical signal after being amplified by the signal amplifier;

[0048] A high-speed camera is used to capture dynamic image information of the bubble group in the experimental water tank from outside the water tank.

[0049] Specifically, the ultrasonic generator can generate ultrasonic waves of specific frequency and intensity and emit them into the liquid in the experimental water tank. The experimental water tank provides a stable environment for ultrasonic propagation and bubble generation. The combination of the two creates basic conditions for research. The sound wave receiving system can receive sound signals, convert them into electrical signals and transmit them to the signal amplifier. The fixing device ensures the stability of the probe position and guarantees the accuracy of signal acquisition. The signal amplifier amplifies the weak electrical signal to the measurable range of the oscilloscope, and the oscilloscope records the waveform, together realizing the accurate measurement and analysis of the relevant parameters of the ultrasonic signal. The high-speed camera captures the dynamic image of the bubble group from the outside. Combined with the above components, the device realizes the comprehensive monitoring of the entire process of ultrasonic bubble dynamics from ultrasonic generation to bubble movement, overcomes the limitations of existing technologies, avoids high-cost testing, and shortens the research cycle.

[0050] An experimental method for studying ultrasonic bubble dynamics, based on the above-mentioned experimental device for studying ultrasonic bubble dynamics, the experimental method for studying ultrasonic bubble dynamics includes the following steps:

[0051] S100, using a fixing device, firmly setting the probe of the ultrasonic generator at a preset depth below the liquid surface, and firmly setting the probe of the sound wave receiving system around the probe of the ultrasonic generator;

[0052] S200, generating ultrasonic waves through an ultrasonic generator, reading oscilloscope data to obtain ultrasonic field parameters, and simultaneously using a high-speed camera to capture bubble group images to obtain bubble group parameters;

[0053] S300, moving the position of the hydrophone probe, and repeating S100-S200 until the complete ultrasonic field parameters and bubble group parameters around the ultrasonic generator probe are obtained;

[0054] S400, using the boundary element model based on potential flow theory to perform numerical simulation and analyze the dynamic characteristics of bubble generation, movement and interaction under the action of ultrasound.

[0055] Specifically, the experimental method for studying ultrasonic bubble dynamics of the present invention is based on a specific experimental device. Through step S100, the probe position is accurately set using a fixing device, laying the foundation for experimental data collection. In step S200, ultrasonic field parameters and bubble group parameters are simultaneously acquired to achieve synchronous acquisition of multiple data and comprehensively reflect the experimental situation. S300 moves the probe for repeated operations to ensure the acquisition of complete data and enhance the reliability of the results. S400 combines advanced numerical simulation technology to deeply analyze the characteristics of bubble dynamics. The overall method overcomes the defects of the existing technology that it is difficult to conduct comprehensive and accurate research. It does not require high-cost actual environment testing and can effectively shorten the test cycle.

[0056] Furthermore, S200 includes the following steps:

[0057] S210, the oscilloscope converts the amplified electrical signal into a pressure signal and displays it for subsequent use;

[0058] S220, selecting a portion of clear and easy-to-observe frame segments in the bubble group image, reading and calculating parameters such as the bubble group density, bubble pulsation period, and bubble maximum radius.

[0059] Specifically, in S210, the oscilloscope converts the amplified electrical signal into a pressure signal and displays it, making the experimental data more practical and intuitive, providing a direct basis for the subsequent accurate analysis of the ultrasonic field parameters, and being able to more accurately understand the propagation characteristics of ultrasonic waves in liquids and their impact on bubble generation. In step S220, by selecting appropriate frame segments in the bubble group image and calculating relevant parameters, quantitative analysis of the bubble group is achieved, which can deeply grasp key information such as the bubble group density, bubble pulsation period, and bubble maximum radius, and help to more comprehensively understand the dynamic behavior and evolution of the bubble group.

[0060] Furthermore, in S220, PCC3.8 software is used for operation.

[0061] Specifically, the high-speed camera used in the present invention is Phantom T4040, and PCC3.8 is the accompanying software required to operate and use the Phantom T4040 camera.

[0062] Furthermore, in S400, a boundary element model is used for numerical simulation.

[0063] Assuming that the fluid in the computational domain is inviscid and irrotational, there is a velocity potential The Laplace equation is satisfied in the flow field outside the bubble:

[0064]

[0065] The boundary integral equation is further obtained according to Green's formula, that is, the function value at any point in the basin is expressed by the value on the boundary and the normal derivative:

[0066]

[0067] Where r represents the flow control point, q represents the boundary integration point, S represents the boundary surface, λ is the solid angle of the flow field observed at point r, n is the normal vector on the boundary, with the normal vector pointing outside the flow field being positive, and G is the Green function G(p,q)=|pq -1 ,

[0068] In the boundary element method, the function value at any point in the flow field is represented by a distributed source:

[0069]

[0070] In the formula, σ represents the distribution source density on the boundary of the flow field. When the velocity potential of the bubble surface is known, the control points are arranged on the bubble surface. The distribution source density σ is solved by the above formula, and the auxiliary function method is used to calculate the distribution source density in the flow field. Item, and then obtain the induced pressure of the bubble in the flow field,

[0071] Since the probe of the ultrasonic generator is forced to vibrate in the flow field, its amplitude A is captured by a high-speed camera, and its frequency w has been calibrated on the ultrasonic instrument, the motion equation of the ultrasonic generator probe in the flow field is obtained as follows:

[0072] w(t)=Asin(wt) (4)

[0073] w is the motion displacement of the ultrasonic generator probe at time t, and the velocity of the ultrasonic generator probe at this time is Awcos(wt). Therefore, the displacement and velocity of the ultrasonic generator probe at time t are obtained. The indirect boundary element method is used to update the flow field and bubble velocity potential at time t, and then the Bernoulli equation is used to solve the flow field pressure.

[0074] Specifically, in S400, by assuming that the fluid in the computational domain is inviscid and irrotational, and using the boundary integral equation obtained by satisfying the Laplace equation and Green's formula, the external flow field characteristics of the bubble can be accurately described with a mathematical model, and the ultrasonic bubble dynamics process can be deeply analyzed from a theoretical level. Based on the relationship between the flow field point function value and the distributed source in the boundary element method, the distributed source density is solved in combination with known conditions and the induced pressure is calculated with the help of the auxiliary function method, so that the force of the bubble in the flow field can be accurately quantified. At the same time, the amplitude of the ultrasonic generator probe and the frequency of the instrument calibration are obtained by a high-speed camera, and the motion equation is constructed. The flow field pressure is solved by combining the indirect boundary element method and the Bernoulli equation, realizing the organic combination of experimental measurement and theoretical calculation. This not only helps to deeply understand the complex dynamic mechanism of bubble generation, movement and interaction under the action of ultrasound, but also provides theoretical verification and supplement for experimental data, and improves the accuracy and reliability of the research results. This numerical simulation method overcomes the bottlenecks of previous theoretical studies in terms of nonlinear motion of bubbles and fluid coupling between bubble groups.

[0075] In this embodiment, after the experiment, the damaged paint coating at the bottom of the experimental water tank is observed using an ultra-depth microscope. The ultra-depth microscope is precisely focused on the damaged area of ​​the paint coating, and the appropriate magnification is adjusted to clearly present the microscopic morphology of the paint coating surface. Carefully observe the various traces of damage such as potholes, cracks, peeling, etc. caused by the action of ultrasonic bubbles on the coating surface, and record their distribution characteristics, size, and degree of damage. By analyzing these microscopic damage characteristics, the destruction mechanism and action law of ultrasonic bubbles on the paint coating under different experimental conditions are further inferred.

[0076] A storage medium stores a computer program, which implements the above-mentioned experimental method for studying ultrasonic bubble dynamics when executed by a processor.

[0077] Specifically, the storage medium of the present invention, the computer program stored therein implements the experimental method for studying ultrasonic bubble dynamics when executed by the processor, so that the experimental method can be efficiently operated in a digital and automated manner. On the one hand, this facilitates scientific researchers to reuse the method under different experimental environments, without repeating the cumbersome experimental steps, and only needs to call the program through the processor to carry out research, thereby improving the repeatability and convenience of the experiment. On the other hand, implementing the experimental method through a computer program helps to more accurately control various parameters in the experimental process, such as the frequency and intensity of the ultrasonic generator, the movement of the probe position, etc., further improving the accuracy of the experimental data.

[0078] A computer device comprises: a memory, a processor and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the above-mentioned experimental method for studying ultrasonic bubble dynamics.

[0079] Specifically, the computer device of the present invention is used to store a computer program for implementing an experimental method for studying ultrasonic bubble dynamics, and the processor undertakes the key task of executing the program. The experimental method is implemented by running the program through the processor, which first ensures the accuracy and stability of the experimental process and avoids the errors and instability that may be caused by manual operation. It can quickly and accurately control the ultrasonic generator to generate ultrasonic waves, collect and process oscilloscope data, analyze bubble group images taken by a high-speed camera, and perform complex numerical simulations according to the set steps, greatly improving the research efficiency. At the same time, the use of computer equipment makes the implementation of the experimental method more flexible. Researchers can easily adjust experimental parameters, such as ultrasonic frequency, probe position, etc., and conduct experimental studies under various conditions, which helps to more comprehensively reveal the laws of ultrasonic bubble dynamics. In addition, the computer device is also convenient for data storage, management and analysis, which provides convenience for subsequent in-depth research.

[0080] The present invention provides an experimental device and an experimental method for studying ultrasonic bubble dynamics. With the help of a well-designed experimental device, such as a reasonably arranged ultrasonic generator, an experimental water tank, a sound wave receiving system, a fixture, a signal amplifier, an oscilloscope, and a high-speed camera, an in-depth study of ultrasonic bubble dynamics is achieved. During the experiment, the position of the ultrasonic generator probe and the hydrophone probe can be accurately controlled to comprehensively collect various data including bubble group images, ultrasonic field parameters, etc., and through advanced numerical simulation technology, the dynamic characteristics of bubble generation, movement, and interaction are deeply analyzed. This not only solves the problem that the existing technology is difficult to comprehensively observe and accurately simulate the dynamic process of bubbles, but also avoids high-cost actual environment testing, greatly shortens the test cycle, and significantly improves the accuracy and economy of the research, providing a valuable new approach for research related to ultrasonic bubble dynamics, and strongly promotes the sustainable development of this field and ultrasonic technology in various application fields.

[0081] It should be noted that, in this article, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An experimental device for studying ultrasonic bubble dynamics, characterized in that: The experimental device for studying ultrasonic bubble dynamics includes an ultrasonic generator, an experimental water tank, a sound wave receiving system, a fixing device, a signal amplifier and an oscilloscope. The experimental water tank contains liquid and a paint coating is provided on the bottom of the tank. The ultrasonic generator and the probe of the sound wave receiving system are arranged below the liquid surface through the fixing device. The probe of the sound wave receiving system surrounds the ultrasonic generator probe. The signal output end of the sound wave receiving system probe is connected to the signal input end of the signal amplifier. The signal output end of the signal amplifier is connected to the signal input end of the oscilloscope. The high-speed camera is arranged outside the experimental water tank, and the lens faces the area between the probe of the ultrasonic generator and the paint coating.

2. An experimental device for studying ultrasonic bubble dynamics according to claim 1, characterized in that: An ultrasonic generator, used to generate ultrasonic waves of specific frequency and intensity, and transmit the ultrasonic waves into the liquid in the experimental water tank through the ultrasonic generator probe; The experimental water tank is used to contain the liquid required for the experiment and provide a stable environment for ultrasonic waves to propagate and generate bubbles; The sound wave receiving system is used to receive the sound signal generated by the ultrasonic wave propagating in the liquid in the experimental water tank, convert the sound signal into an electrical signal, and transmit the electrical signal to the signal amplifier for amplification processing; A fixing device, used for fixing the position of the ultrasonic generator probe and the sound wave receiving system probe; The signal amplifier is used to amplify the weak electrical signal transmitted by the sound wave receiving system, so that the signal strength reaches the range that the oscilloscope can accurately measure and display, and transmit the amplified electrical signal to the oscilloscope; Oscilloscope, used to display and record the waveform of the electrical signal after being amplified by the signal amplifier; A high-speed camera is used to capture dynamic image information of the bubble group in the experimental water tank from outside the water tank.

3. An experimental method for studying ultrasonic bubble dynamics, based on an experimental device for studying ultrasonic bubble dynamics according to any one of claims 1-2, characterized in that: The experimental method for studying ultrasonic bubble dynamics comprises the following steps: S100, using a fixing device, firmly setting the probe of the ultrasonic generator at a preset depth below the liquid surface, and firmly setting the probe of the sound wave receiving system around the probe of the ultrasonic generator; S200, generating ultrasonic waves through an ultrasonic generator, reading oscilloscope data to obtain ultrasonic field parameters, and simultaneously using a high-speed camera to capture bubble group images to obtain bubble group parameters; S300, moving the position of the hydrophone probe, and repeating S100-S200 until the complete ultrasonic field parameters and bubble group parameters around the ultrasonic generator probe are obtained; S400, using the boundary element model based on potential flow theory to perform numerical simulation and analyze the dynamic characteristics of bubble generation, movement and interaction under the action of ultrasound.

4. An experimental method for studying ultrasonic bubble dynamics according to claim 3, characterized in that: S200 includes the following steps: S210, the oscilloscope converts the amplified electrical signal into a pressure signal and displays it for subsequent use; S220, selecting a portion of clear and easy-to-observe frame segments in the bubble group image, and reading and calculating parameters such as bubble group density, bubble pulsation period, and bubble maximum radius.

5. An experimental method for studying ultrasonic bubble dynamics according to claim 4, characterized in that: In S220, PCC3.8 software is used for operation.

6. An experimental method for studying ultrasonic bubble dynamics according to claim 5, characterized in that: In S400, the boundary element model is used for numerical simulation. Assuming that the fluid in the computational domain is inviscid and irrotational, there is a velocity potential The Laplace equation is satisfied in the flow field outside the bubble: The boundary integral equation is further obtained according to Green's formula, that is, the function value at any point in the basin is expressed by the value on the boundary and the normal derivative: Where r represents the flow control point, q represents the boundary integration point, S represents the boundary surface, λ is the solid angle of the flow field observed at point r, n is the normal vector on the boundary, with the normal vector pointing outside the flow field being positive, and G is the Green function G(p,q)=|pq -1 , In the boundary element method, the function value at any point in the flow field is represented by a distribution source: In the formula, σ represents the distribution source density on the boundary of the flow field. When the velocity potential of the bubble surface is known, the control points are arranged on the bubble surface. The distribution source density σ is solved by the above formula, and the auxiliary function method is used to calculate the distribution source density in the flow field. Item, and then obtain the induced pressure of the bubble in the flow field, Since the probe of the ultrasonic generator is forced to vibrate in the flow field, its amplitude A is captured by a high-speed camera, and its frequency w has been calibrated on the ultrasonic instrument, the motion equation of the ultrasonic generator probe in the flow field is obtained as follows: w(t)=Asin(wt) (4) w is the motion displacement of the ultrasonic generator probe at time t, and the velocity of the ultrasonic generator probe at this time is Awcos(wt). Therefore, the displacement and velocity of the ultrasonic generator probe at time t are obtained. The indirect boundary element method is used to update the flow field and bubble velocity potential at time t, and then the Bernoulli equation is used to solve the flow field pressure.

7. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, an experimental method for studying ultrasonic bubble dynamics as described in any one of claims 3 to 6 is implemented.

8. A computer device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement an experimental method for studying ultrasonic bubble dynamics as described in any one of claims 3 to 6.

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