Design method and design device of electromagnetic focusing shock wave acoustic lens

Abstract

The present application provides a design method and device for an electromagnetic focused shock wave acoustic lens. The method includes inputting initial design parameters into an acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional model of the acoustic lens. The acoustic pressure time-domain curve of each measurement point outside the electromagnetic focused shock wave acoustic lens is obtained through finite element simulation, and the measurement point with the highest sound pressure amplitude among multiple measurement points is used as the simulation focus position. The shock wave parameters and the shock wave focal zone size are calculated based on the acoustic pressure time-domain curve of each point outside the electromagnetic focused shock wave acoustic lens. The thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens are determined as the target design parameters of the electromagnetic focused shock wave acoustic lens, so that the electromagnetic focused shock wave acoustic lens is manufactured according to the target design parameters. The method and device improve the design accuracy of the electromagnetic focused shock wave acoustic lens.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic focused shock waves, and in particular to a design method and a design device for an electromagnetic focused shock wave acoustic lens. Background Art

[0002] Electromagnetic focused shock wave technology uses an electroacoustic energy converter to generate high-energy shock wave energy, which is focused by an acoustic lens and then transmitted to a specific part. The shock wave energy produces physical and physiological effects on the internal tissues of the human body, thereby achieving the purpose of treatment.

[0003] The acoustic lens is a key factor influencing the focusing effect of sound waves. Previous studies have proposed a three-medium acoustic wave propagation path design: a vibrating plate-water-acoustic lens-human tissue. The core of this design is the effective focusing of sound waves through the shape of the acoustic lens. However, most current acoustic lens designs only consider the geometric focus of the sound rays after refraction under Snell's law, using a circular arc structure at both ends to achieve shock wave focusing. This approach does not fully account for the wave interference effect during sound propagation, resulting in inaccurate focus position. Summary of the Invention

[0004] In light of this, the purpose of this application is to provide a design method and device for an electromagnetic focused shock wave acoustic lens. By establishing a mathematical model for the propagation and refraction of sound waves in various media, and after determining the thickness and theoretical focal position, finite element simulation is used to calculate the simulated focal position and shock wave parameters. This method then determines the shape of the acoustic lens in which the theoretical and actual focal points coincide, ensuring that the sound waves are focused at the specified location. This method improves the design accuracy of the electromagnetic focused shock wave acoustic lens and also enhances the therapeutic efficacy of electromagnetic focused shock wave therapy.

[0005] In a first aspect, an embodiment of the present application provides a method for designing an electromagnetic focusing shock wave acoustic lens, the method comprising:

[0006] Initial design parameters of an electromagnetic focused shock wave acoustic lens are obtained, and the initial design parameters are input into an acoustic wave mathematical model to construct a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model. The initial design parameters include the thickness of the acoustic lens, the theoretical focal position, and the angle between the initial emission direction of the acoustic wave and the radial direction of the planar vibrating plate. The acoustic wave mathematical model assumes multiple media for acoustic wave propagation. The three-dimensional acoustic lens model is constructed using the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens.

[0007] Importing the three-dimensional acoustic lens model into a finite element calculation model, obtaining a time-domain curve of the sound pressure at each measurement point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and taking the measurement point with the highest sound pressure amplitude among the multiple measurement points as the simulation focus position;

[0008] When the simulated focal position is the same as the theoretical focal position, the shock wave parameters and the shock wave focal zone size are calculated based on the time-domain curve of the sound pressure at each point outside the electromagnetic focused shock wave acoustic lens;

[0009] When it is determined that the shock wave parameters and the shock wave focal zone size meet the preset design requirements, the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens are determined as the target design parameters of the electromagnetic focusing shock wave acoustic lens, so that the electromagnetic focusing shock wave acoustic lens is manufactured according to the target design parameters.

[0010] Furthermore, the initial design parameters are input into an acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional acoustic lens model, including:

[0011] Based on the geometric relationship and constraint equations of the acoustic wave mathematical model, a nonlinear differential equation group is established using the initial design parameters;

[0012] Solving the nonlinear differential equations to obtain a numerical solution of the inner curve of the acoustic lens and a numerical solution of the outer curve of the acoustic lens;

[0013] The three-dimensional model of the acoustic lens is constructed according to the numerical solution of the inner curve of the acoustic lens, the numerical solution of the outer curve of the acoustic lens, and the thickness of the acoustic lens.

[0014] Furthermore, the design method further includes:

[0015] When the simulated focal position is different from the theoretical focal position, the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the planar vibration plate is adjusted, and the step of inputting the initial design parameters into the sound wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens is returned to, until the simulated focal position is the same as the theoretical focal position.

[0016] Furthermore, the design method further includes:

[0017] When it is determined that the shock wave parameters and the shock wave focal zone size do not meet the preset design requirements, the acoustic lens thickness and the theoretical focal position in the initial design parameters are adjusted, and the process returns to the step of inputting the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens, until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

[0018] In a second aspect, an embodiment of the present application further provides a design device for an electromagnetic focused shock wave acoustic lens, the design device comprising:

[0019] A three-dimensional model building module is configured to obtain initial design parameters of an electromagnetic focused shock wave acoustic lens and input the initial design parameters into an acoustic wave mathematical model to build a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model. The initial design parameters include the thickness of the acoustic lens, the theoretical focal position, and the angle between the initial emission direction of the acoustic wave and the radial direction of the planar vibrating plate. The acoustic wave mathematical model is configured to include multiple media for acoustic wave propagation. The three-dimensional acoustic lens model is constructed using the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens.

[0020] a simulation focus position determination module, configured to import the three-dimensional acoustic lens model into a finite element calculation model, obtain a time-domain curve of sound pressure at each measurement point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and select the measurement point with the highest sound pressure amplitude among the multiple measurement points as the simulation focus position;

[0021] a parameter calculation module, configured to calculate shock wave parameters and shock wave focal zone size based on a time-domain curve of sound pressure at each point outside the electromagnetic focused shock wave acoustic lens when the simulated focal position is the same as the theoretical focal position;

[0022] A target design parameter determination module is used to determine the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens as target design parameters of the electromagnetic focusing shock wave acoustic lens when it is determined that the shock wave parameters and the size of the shock wave focal zone meet the preset design requirements, so as to manufacture the electromagnetic focusing shock wave acoustic lens according to the target design parameters.

[0023] Furthermore, when the three-dimensional model building module is used to input the initial design parameters into the acoustic wave mathematical model to build a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain the three-dimensional model of the acoustic lens, the three-dimensional model building module is also used to:

[0024] Based on the geometric relationship and constraint equations of the acoustic wave mathematical model, a nonlinear differential equation group is established using the initial design parameters;

[0025] Solving the nonlinear differential equations to obtain a numerical solution of the inner curve of the acoustic lens and a numerical solution of the outer curve of the acoustic lens;

[0026] The three-dimensional model of the acoustic lens is constructed according to the numerical solution of the inner curve of the acoustic lens, the numerical solution of the outer curve of the acoustic lens, and the thickness of the acoustic lens.

[0027] Furthermore, the design device further includes a first parameter adjustment module, which is configured to:

[0028] When the simulated focal position is different from the theoretical focal position, the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the planar vibration plate is adjusted, and the step of inputting the initial design parameters into the sound wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens is returned to, until the simulated focal position is the same as the theoretical focal position.

[0029] Furthermore, the design device further includes a second parameter adjustment module, which is configured to:

[0030] When it is determined that the shock wave parameters and the shock wave focal zone size do not meet the preset design requirements, the acoustic lens thickness and the theoretical focal position in the initial design parameters are adjusted, and the process returns to the step of inputting the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens, until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

[0031] In a third aspect, an embodiment of the present application further provides an electronic device comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate via the bus, and when the machine-readable instructions are executed by the processor, the steps of the method for designing an electromagnetic focused shock wave acoustic lens as described above are performed.

[0032] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for designing an electromagnetic focusing shock wave acoustic lens as described above are executed.

[0033] The embodiment of the present application provides a design method and a design device for an electromagnetic focusing shock wave acoustic lens. First, initial design parameters of the electromagnetic focusing shock wave acoustic lens are obtained, and the initial design parameters are input into an acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focusing shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens; wherein the initial design parameters include the thickness of the acoustic lens, the theoretical focal position, and the angle between the initial emission direction of the acoustic wave and the radial direction of the planar vibrating plate; the acoustic wave mathematical model is set with multiple media for acoustic wave propagation; the three-dimensional model of the acoustic lens is constructed by the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens; then, the three-dimensional model of the acoustic lens is imported into a finite element calculation model, and the three-dimensional model of the acoustic lens is obtained. Finite element simulation is used to obtain a time-domain curve of sound pressure at each measurement point outside the electromagnetic focused shock wave acoustic lens, and the measurement point with the highest sound pressure amplitude among the multiple measurement points is used as the simulation focal position; when the simulation focal position is the same as the theoretical focal position, the shock wave parameters and the shock wave focal zone size are calculated based on the time-domain curve of sound pressure at each point outside the electromagnetic focused shock wave acoustic lens; finally, when it is determined that the shock wave parameters and the shock wave focal zone size meet the preset design requirements, the acoustic lens thickness, the inner curve of the acoustic lens, and the outer curve of the acoustic lens are determined as the target design parameters of the electromagnetic focused shock wave acoustic lens, so that the electromagnetic focused shock wave acoustic lens is manufactured according to the target design parameters.

[0034] This application establishes a mathematical model for the propagation and refraction of sound waves in various media. After determining the thickness and theoretical focal position, finite element simulation is used to calculate the simulated focal position and shock wave parameters. This determines the shape of the acoustic lens in which the theoretical and actual focal points coincide, ensuring that the sound waves are focused at the specified location. This improves the design accuracy of the electromagnetic shock wave focusing acoustic lens, reduces the offset of the electromagnetic focused shock wave focal position, improves the focusing performance, and also enhances the therapeutic effect of electromagnetic focused shock wave therapy.

[0035] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A flow chart of a design method for an electromagnetic focused shock wave acoustic lens provided in an embodiment of the present application;

[0038] Figure 2 A diagram showing the structure of an electromagnetic acoustic lens focusing shock waves provided in an embodiment of the present application;

[0039] Figure 3 A schematic diagram of a mathematical model of an electromagnetic focused shock wave provided in an embodiment of the present application;

[0040] Figure 4 A flow chart of another method for designing an electromagnetic focused shock wave acoustic lens provided in an embodiment of the present application;

[0041] Figure 5 A schematic diagram of the structure of a design device for an electromagnetic focused shock wave acoustic lens provided in an embodiment of the present application;

[0042] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for which protection is claimed, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work falls within the scope of protection of the present application.

[0044] First, the application scenarios to which this application is applicable are introduced. This application can be applied in the field of electromagnetic focused shock wave technology.

[0045] Electromagnetic focused shock wave technology uses an electroacoustic energy converter to generate high-energy shock wave energy, which is focused by an acoustic lens and then transmitted to a specific part. The shock wave energy produces physical and physiological effects on the internal tissues of the human body, thereby achieving the purpose of treatment.

[0046] Research has found that the acoustic lens is a key factor influencing the focusing effect of sound waves. Previous studies have proposed a three-medium acoustic wave propagation path design: a vibrating plate-water-acoustic lens-human tissue. The core of this design is the effective focusing of sound waves through the shape of the acoustic lens. However, most current acoustic lens designs only consider the geometric focus of the sound rays after refraction under Snell's law, using a circular arc structure at both ends to achieve shock wave focusing. This approach does not fully account for the wave interference effects during sound propagation, resulting in inaccurate focus position.

[0047] Based on this, the embodiment of the present application provides a design method for an electromagnetic focused shock wave acoustic lens, which improves the design accuracy of the electromagnetic focused shock wave acoustic lens and also improves the therapeutic effect of electromagnetic focused shock wave therapy.

[0048] See also Figure 1 , Figure 1 This is a flow chart of a design method for an electromagnetic focusing shock wave acoustic lens provided in an embodiment of the present application. Figure 1 As shown in , the design method of the electromagnetic focusing shock wave acoustic lens provided in the embodiment of the present application includes:

[0049] S101, obtaining initial design parameters of an electromagnetic focused shock wave acoustic lens, and inputting the initial design parameters into an acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model.

[0050] Here, the initial design parameters include the acoustic lens thickness l, the theoretical focal position f, and the angle α between the initial acoustic wave emission direction and the radial direction of the planar vibrator. Specifically, in an electromagnetic focused shock wave acoustic lens, the focal position refers to the area where the energy of the sound wave is concentrated and the sound pressure reaches its maximum after passing through the acoustic lens. The focal position is a key parameter in acoustic lens design, directly affecting the focusing effect of the shock wave and the application effect. The angle α between the initial acoustic wave emission direction and the radial direction of the planar vibrator is related to the planar vibrator parameters and the coil parameters, and is a parameter affected by the coupling of multiple physical factors.

[0051] In the embodiments provided herein, the mathematical model of acoustic waves includes multiple media for acoustic wave propagation. Here, as an example, the mathematical model of acoustic waves can include three media for acoustic wave propagation: medium 1 is a cooling medium, medium 2 is an acoustic lens material, and medium 3 is human tissue. The acoustic waves emitted by the vibrating plate pass through medium 1 and enter the acoustic lens. Medium 1, the cooling medium, serves to conduct the sound waves and cool the vibrating plate and coil. Medium 2, the acoustic lens material, serves to focus the acoustic waves emitted by the vibrating plate. Medium 3, the human tissue, serves as the target area for the shock wave.

[0052] In the specific implementation of step S101, the design parameters of the electromagnetic focused shock wave acoustic lens are first preliminarily set. Initial design parameters of the electromagnetic focused shock wave acoustic lens are obtained, including the acoustic lens thickness l, the theoretical focal position f, and the angle α between the initial acoustic wave emission direction and the radial direction of the planar vibrating plate. These initial design parameters are then input into a pre-established acoustic wave mathematical model to construct a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model.

[0053] See also Figure 2 , Figure 2 This is a diagram showing the structure of an electromagnetic acoustic lens focusing shock waves provided in an embodiment of the present application. Figure 2 As shown, the shape of the acoustic lens can be simplified to the inner curve f1(x), the outer curve f2(x), and the thickness l of the acoustic lens. A three-dimensional model of the acoustic lens can be constructed based on the numerical solutions of the inner and outer curves f1(x), f2(x), and the thickness l. Therefore, the three-dimensional model of the acoustic lens is constructed using the lens thickness, the inner and outer curves. The acoustic lens is a solid of revolution symmetrical about its central axis. The design of the acoustic lens allows the acoustic wave to focus on the central axis of the tissue domain. The focal position, the energy flux density of the focused shock wave, and the size of the shock wave focal zone all directly affect the therapeutic effect. Therefore, the acoustic lens must be precisely designed to ensure that the shock wave achieves the desired effect at the specified location.

[0054] See also Figure 3 , Figure 3 This is a schematic diagram of a mathematical model of an electromagnetic focused shock wave provided in an embodiment of the present application. Figure 3As shown, the initial direction of acoustic emission is set vertically upward. A vertical acoustic ray is emitted from any point O1 on the x-axis and enters medium 1 (sound velocity c1, density ρ1). After passing through the curve f1(x) below the acoustic lens, it is refracted. The angle of incidence at point A is offset from the normal direction of f1(x) by a certain angle, which can be determined by Snell's theorem. It then intersects with f2(x) at point B and is refracted again, ultimately converging at a focal point F. Under this mathematical model, all rays emitted on the x-axis should reach the focal point F simultaneously, and the acoustic ray trajectory is O1ABF. The y-axis is the geometric center axis of the acoustic lens's rotating body, and the x-axis is the radial direction of the vibrating plate. Coordinates of each point: Point O (0,0) is the origin; Point O1 (m,0) is an arbitrary point on the x-axis from which an acoustic ray originates; Point A (m,f1(m)) is the intersection point where the acoustic ray enters the acoustic lens from water; Point B (n,f2(n)) is the intersection point where the acoustic ray enters human tissue from the acoustic lens; Point O2 (0,l) is the focal point between the thickness of the acoustic lens and the central line; and F (0,f) is the assumed theoretical focal point. θ1 is the incident angle of the acoustic ray at point A; θ'1 is the exit angle of the acoustic ray at point A. θ2 is the incident angle of the acoustic ray at point B; θ'2 is the exit angle of the acoustic ray at point B. α is the angle between the initial emission direction of the acoustic wave and the x-axis. After establishing the mathematical model, three constraints are added: According to Snell's theorem, refraction occurs in two adjacent media due to different sound velocities; and due to the wave properties of sound waves, it is necessary to prevent the sound waves from canceling each other out when converging at the focal point.

[0055] As an optional embodiment, with respect to the above step S101, inputting the initial design parameters into an acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional acoustic lens model includes:

[0056] Step 1011 : Based on the geometric relationship and constraint equations of the acoustic wave mathematical model, a nonlinear differential equation group is established using the initial design parameters.

[0057] Regarding step 1011, during implementation, a nonlinear differential equation system is established using the initial design parameters l, f, and α based on the geometric relationships and constraint equations of the constructed acoustic wave mathematical model. Here, the nonlinear differential equation system is a nonlinear differential equation system involving f1(x), f2(x), f'1(x), and f'2(x), with initial input conditions l, f, and α and an independent variable x.

[0058] Step 1012: Solve the nonlinear differential equations to obtain a numerical solution of the inner curve of the acoustic lens and a numerical solution of the outer curve of the acoustic lens.

[0059] Step 1013: construct a three-dimensional model of the acoustic lens according to the numerical solution of the inner curve of the acoustic lens, the numerical solution of the outer curve of the acoustic lens, and the thickness of the acoustic lens.

[0060] During the specific implementation of steps 1012 and 1013, the nonlinear differential equations constructed in step 1011 are solved. Specifically, mathematical calculation software is used to solve the nonlinear differential equations to obtain the numerical solutions for the inner curve f1(x) of the acoustic lens and the outer curve f2(x) of the acoustic lens. At this point, a three-dimensional model of the acoustic lens can be constructed based on the numerical solutions for the inner curve f1(x), the outer curve f2(x), and the thickness l of the acoustic lens, thereby obtaining a three-dimensional model of the acoustic lens.

[0061] S102, importing the three-dimensional model of the acoustic lens into a finite element calculation model, obtaining a time-domain curve of the sound pressure at each measurement point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and taking the measurement point with the highest sound pressure amplitude among the multiple measurement points as the simulation focus position.

[0062] The principle of electroacoustic energy conversion in electromagnetic focused shock waves is to use an oscillating current to excite a coil. This creates mutual induction between the coil and the vibrating plate, generating a mutual induction current within the vibrating plate. The interaction between the mutual induction current and the magnetic field generated by the coil generates an electromagnetic force within the vibrating plate, causing it to vibrate. The greater the coil inductance, the greater the intensity of the initial sound wave emitted by the vibrating plate. The initial direction of the sound wave emitted by the vibrating plate is unknown and can only be determined through finite element simulation. Each measurement point outside the electromagnetic focused shock wave acoustic lens represents the location within the space outside the lens where the sound wave propagates after being focused by the lens. Specifically, during finite element simulation, the sound pressure at each measurement point outside the lens is measured and analyzed to assess the focusing effect of the sound wave. These measurements include key locations along the sound wave propagation path, such as points near and around the focal point. The time-domain sound pressure curves at the measurement points reflect the sound pressure levels at different points in time. This time-domain sound pressure curve can be used to assess the sound pressure distribution at different locations, thereby verifying whether the acoustic lens design achieves the desired focusing effect.

[0063] During the implementation of step S102, the established three-dimensional acoustic lens model is imported into a finite element calculation model. The assembly structure relationships of the various components and the required high-frequency pulse current are set. Finite element simulation is then performed to calculate the time-domain sound pressure curve for each measurement point outside the electromagnetic focused shockwave acoustic lens. The measurement point with the highest sound pressure amplitude in the finite element simulation results is then identified and used as the simulation focal point.

[0064] S103 , when the simulated focal position is the same as the theoretical focal position, calculating shock wave parameters and shock wave focal zone size based on a time-domain curve of sound pressure at each point outside the electromagnetic focused shock wave acoustic lens.

[0065] Here, as an example, the shock wave parameters may include sound pressure peak, pulse width, rise time, fall time, etc., and the shock wave focal zone size may include focal length, focal zone depth, focal zone width, etc., which is not specifically limited in this application.

[0066] Regarding the above step S103, during the specific implementation, it is first determined whether the simulated focal position determined in the above step S102 is the same as the theoretical focal position in the initial design parameters. If they are the same, the shock wave parameters and the shock wave focal area size are calculated based on the sound pressure time domain curve of each point outside the electromagnetic focused shock wave acoustic lens.

[0067] As an optional embodiment, the design method provided in the embodiment of the present application further includes:

[0068] When the simulated focal position is different from the theoretical focal position, the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the planar vibration plate is adjusted, and the step of inputting the initial design parameters into the sound wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens is returned to, until the simulated focal position is the same as the theoretical focal position.

[0069] Regarding the above steps, during specific implementation, if the simulated focal position calculated by the finite element simulation is different from the theoretical focal position in the initial design parameters, it indicates that the actual emission direction of the sound wave is different from the initial setting. In this case, it is necessary to adjust the angle α between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the planar vibrating plate. Then, the process returns to step S101, inputting the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model, until the simulated focal position calculated by the finite element simulation is the same as the set theoretical focal position. In this way, through iterative calculations of the mathematical model and finite element simulation, the focal position of the shock wave can be determined, and the shape of the acoustic lens in which the theoretical focal point coincides with the actual focal point can be iteratively optimized.

[0070] S104. When it is determined that the shock wave parameters and the size of the shock wave focal zone meet the preset design requirements, the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens are determined as target design parameters of the electromagnetic focusing shock wave acoustic lens, so as to manufacture the electromagnetic focusing shock wave acoustic lens according to the target design parameters.

[0071] Regarding step S104 above, during specific implementation, after the shock wave parameters and shock wave focal zone size calculated in step S103 are determined, a determination is made as to whether they meet the preset design requirements. Here, as an example, when the shock wave parameter is peak sound pressure, the preset design requirement requires ensuring that the peak sound pressure is sufficiently high to achieve the desired therapeutic effect. For example, the preset design requirement may set the peak sound pressure to be greater than 8 MPa. When the shock wave focal zone size includes focal zone depth and focal zone width, the preset design requirement requires ensuring that the focal zone depth and focal zone width are moderate, neither too large nor too small, to ensure that the energy is concentrated in the target area. For example, the preset design requirement may set the focal zone depth and focal zone width to be less than 3 mm, respectively. The shock wave parameters and shock wave focal zone size calculated in step S103 are compared with the preset design requirements. Here, continuing with the above example, when the peak sound pressure is 10 MPa, the focal zone depth is 2 mm, and the focal zone width is 2 mm, it is considered to meet the preset design requirements. When it is determined that the shock wave parameters and the size of the shock wave focal zone meet the preset design requirements, the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens are determined as the target design parameters of the electromagnetic focusing shock wave acoustic lens, so that the electromagnetic focusing shock wave acoustic lens is manufactured according to the target design parameters.

[0072] As an optional embodiment, the design method provided in the embodiment of the present application further includes:

[0073] When it is determined that the shock wave parameters and the shock wave focal zone size do not meet the preset design requirements, the acoustic lens thickness and the theoretical focal position in the initial design parameters are adjusted, and the process returns to the step of inputting the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens, until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

[0074] Regarding the above steps, during specific implementation, if the shock wave parameters and shock wave focal zone size calculated in step S103 do not meet the design requirements, the acoustic lens thickness and the theoretical focal position in the initial design parameters need to be adjusted. The process then returns to step S101, where the initial design parameters are input into the acoustic wave mathematical model to construct a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model. This process continues until the shock wave parameters and shock wave focal zone size meet the preset design requirements. In this way, through iterative calculations using the mathematical model and finite element simulation, it is possible to ensure that the shock wave under the current design parameters meets the design requirements, with strict requirements for the shock wave energy flux density, focal zone position, and size. This ensures that the subsequently produced acoustic lens is more accurate and avoids damage to the human body.

[0075] See also Figure 4 , Figure 4 This is a flow chart of another design method of an electromagnetic focusing shock wave acoustic lens provided in an embodiment of the present application. Figure 4 As shown, first, a mathematical model is set, and initial design parameters are set at the same time. Then, the shape of the acoustic lens is calculated through the mathematical model. The position of the acoustic lens focus, shock wave parameters and shock wave focal area size are calculated through finite element simulation. It is judged whether the simulated focal position coincides with the theoretical focal position. If not, the angle between the initial emission direction of the acoustic wave in the initial design parameters and the radial direction of the plane vibration plate is adjusted for iterative calculation. If so, it is continued to judge whether the shock wave parameters and shock wave focal area parameters meet expectations. If not, the acoustic lens thickness and the theoretical focal position in the initial design parameters are adjusted for iterative calculation. If so, the target design parameters are determined to make the acoustic lens.

[0076] The design method of the electromagnetic focusing shock wave acoustic lens provided in the embodiment of the present application first obtains initial design parameters of the electromagnetic focusing shock wave acoustic lens, and inputs the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focusing shock wave acoustic lens, thereby obtaining a three-dimensional model of the acoustic lens; wherein the initial design parameters include the thickness of the acoustic lens, the theoretical focal position, and the angle between the initial emission direction of the acoustic wave and the radial direction of the planar vibrating plate, the acoustic wave mathematical model is set with multiple media for acoustic wave propagation, and the three-dimensional model of the acoustic lens is constructed by the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens; then, the three-dimensional model of the acoustic lens is imported into a finite element calculation model, and the finite element method is used to calculate the acoustic lens. The time-domain curve of the sound pressure of each measuring point outside the electromagnetic focused shock wave acoustic lens is simulated, and the measuring point with the highest sound pressure amplitude among the multiple measuring points is used as the simulated focal position; when the simulated focal position is the same as the theoretical focal position, the shock wave parameters and the shock wave focal zone size are calculated based on the time-domain curve of the sound pressure of each point outside the electromagnetic focused shock wave acoustic lens; finally, when it is judged that the shock wave parameters and the shock wave focal zone size meet the preset design requirements, the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens are determined as the target design parameters of the electromagnetic focused shock wave acoustic lens, so that the electromagnetic focused shock wave acoustic lens is manufactured according to the target design parameters.

[0077] This application establishes a mathematical model for the propagation and refraction of sound waves in various media. After determining the thickness and theoretical focal position, finite element simulation is used to calculate the simulated focal position and shock wave parameters. This determines the shape of the acoustic lens in which the theoretical and actual focal points coincide, ensuring that the sound waves are focused at the specified location. This improves the design accuracy of the electromagnetic shock wave focusing acoustic lens, reduces the offset of the electromagnetic focused shock wave focal position, improves the focusing performance, and also enhances the therapeutic effect of electromagnetic focused shock wave therapy.

[0078] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of a design device for an electromagnetic focusing shock wave acoustic lens provided in an embodiment of the present application. Figure 5 As shown in , the design device 500 includes:

[0079] A three-dimensional model building module 501 is used to obtain initial design parameters of the electromagnetic focused shock wave acoustic lens and input the initial design parameters into an acoustic wave mathematical model to build a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional acoustic lens model. The initial design parameters include the thickness of the acoustic lens, the theoretical focal position, and the angle between the initial emission direction of the acoustic wave and the radial direction of the planar vibrating plate. The acoustic wave mathematical model assumes multiple media for acoustic wave propagation. The three-dimensional acoustic lens model is constructed based on the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens.

[0080] A simulation focus position determination module 502 is configured to import the three-dimensional acoustic lens model into a finite element calculation model, obtain a time-domain sound pressure curve for each measurement point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and select the measurement point with the highest sound pressure amplitude among the multiple measurement points as the simulation focus position;

[0081] a parameter calculation module 503 for calculating shock wave parameters and shock wave focal zone size based on a time-domain curve of sound pressure at each point outside the electromagnetic focused shock wave acoustic lens when the simulated focal position is the same as the theoretical focal position;

[0082] The target design parameter determination module 504 is used to determine the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens as the target design parameters of the electromagnetic focusing shock wave acoustic lens when it is determined that the shock wave parameters and the shock wave focal zone size meet the preset design requirements, so as to manufacture the electromagnetic focusing shock wave acoustic lens according to the target design parameters.

[0083] Furthermore, when the three-dimensional model building module 501 is used to input the initial design parameters into the acoustic wave mathematical model to build a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain the three-dimensional model of the acoustic lens, the three-dimensional model building module 501 is further used to:

[0084] Based on the geometric relationship and constraint equations of the acoustic wave mathematical model, a nonlinear differential equation group is established using the initial design parameters;

[0085] Solving the nonlinear differential equations to obtain a numerical solution of the inner curve of the acoustic lens and a numerical solution of the outer curve of the acoustic lens;

[0086] The three-dimensional model of the acoustic lens is constructed according to the numerical solution of the inner curve of the acoustic lens, the numerical solution of the outer curve of the acoustic lens, and the thickness of the acoustic lens.

[0087] Furthermore, the design device further includes a first parameter adjustment module, which is configured to:

[0088] When the simulated focal position is different from the theoretical focal position, the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the planar vibration plate is adjusted, and the step of inputting the initial design parameters into the sound wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens is returned to, until the simulated focal position is the same as the theoretical focal position.

[0089] Furthermore, the design device further includes a second parameter adjustment module, which is configured to:

[0090] When it is determined that the shock wave parameters and the shock wave focal zone size do not meet the preset design requirements, the acoustic lens thickness and the theoretical focal position in the initial design parameters are adjusted, and the process returns to the step of inputting the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens, until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

[0091] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 6 As shown in FIG, the electronic device 600 includes a processor 610 , a memory 620 and a bus 630 .

[0092] The memory 620 stores machine-readable instructions executable by the processor 610. When the electronic device 600 is running, the processor 610 communicates with the memory 620 via the bus 630. When the machine-readable instructions are executed by the processor 610, the above-mentioned Figure 1 The steps of the method for designing the electromagnetic focusing shock wave acoustic lens in the method embodiment shown are specifically implemented in accordance with the method embodiment and will not be described in detail here.

[0093] The embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 The steps of the method for designing the electromagnetic focusing shock wave acoustic lens in the method embodiment shown are specifically implemented in accordance with the method embodiment and will not be described in detail here.

[0094] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0095] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0096] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0097] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0098] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0099] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-mentioned embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. However, these modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A design method for an electromagnetic focused shock wave acoustic lens, characterized in that: The design method includes: Initial design parameters of an electromagnetic focused shock wave acoustic lens are obtained, and the initial design parameters are input into an acoustic wave mathematical model to construct a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model. The initial design parameters include the thickness of the acoustic lens, the theoretical focal position, and the angle between the initial emission direction of the acoustic wave and the radial direction of the planar vibrating plate. The acoustic wave mathematical model assumes multiple media for acoustic wave propagation. The three-dimensional acoustic lens model is constructed using the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens. Importing the three-dimensional acoustic lens model into a finite element calculation model, obtaining a time-domain curve of the sound pressure at each measurement point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and taking the measurement point with the highest sound pressure amplitude among the multiple measurement points as the simulation focus position; When the simulated focal position is the same as the theoretical focal position, the shock wave parameters and the shock wave focal zone size are calculated based on the time-domain curve of the sound pressure at each point outside the electromagnetic focused shock wave acoustic lens; When it is determined that the shock wave parameters and the shock wave focal zone size meet the preset design requirements, the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens are determined as the target design parameters of the electromagnetic focusing shock wave acoustic lens, so that the electromagnetic focusing shock wave acoustic lens is manufactured according to the target design parameters.

2. The design method according to claim 1, characterized in that: Inputting the initial design parameters into an acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional acoustic lens model includes: Based on the geometric relationship and constraint equations of the acoustic wave mathematical model, a nonlinear differential equation group is established using the initial design parameters; Solving the nonlinear differential equations to obtain a numerical solution of the inner curve of the acoustic lens and a numerical solution of the outer curve of the acoustic lens; The three-dimensional model of the acoustic lens is constructed according to the numerical solution of the inner curve of the acoustic lens, the numerical solution of the outer curve of the acoustic lens, and the thickness of the acoustic lens.

3. The design method according to claim 1, characterized in that: The design method further includes: When the simulated focal position is different from the theoretical focal position, the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the planar vibration plate is adjusted, and the step of inputting the initial design parameters into the sound wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens is returned to, until the simulated focal position is the same as the theoretical focal position.

4. The design method according to claim 1, characterized in that: The design method further includes: When it is determined that the shock wave parameters and the shock wave focal zone size do not meet the preset design requirements, the acoustic lens thickness and the theoretical focal position in the initial design parameters are adjusted, and the process returns to the step of inputting the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens, until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

5. A design device for an electromagnetic focusing shock wave acoustic lens, characterized in that: The design device comprises: A three-dimensional model building module is configured to obtain initial design parameters of an electromagnetic focused shock wave acoustic lens and input the initial design parameters into an acoustic wave mathematical model to build a three-dimensional model of the electromagnetic focused shock wave acoustic lens, thereby obtaining a three-dimensional acoustic lens model. The initial design parameters include the thickness of the acoustic lens, the theoretical focal position, and the angle between the initial emission direction of the acoustic wave and the radial direction of the planar vibrating plate. The acoustic wave mathematical model is configured to include multiple media for acoustic wave propagation. The three-dimensional acoustic lens model is constructed using the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens. a simulation focus position determination module, configured to import the three-dimensional acoustic lens model into a finite element calculation model, obtain a time-domain curve of sound pressure at each measurement point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and select the measurement point with the highest sound pressure amplitude among the multiple measurement points as the simulation focus position; a parameter calculation module, configured to calculate shock wave parameters and shock wave focal zone size based on a time-domain curve of sound pressure at each point outside the electromagnetic focused shock wave acoustic lens when the simulated focal position is the same as the theoretical focal position; A target design parameter determination module is used to determine the thickness of the acoustic lens, the inner curve of the acoustic lens, and the outer curve of the acoustic lens as target design parameters of the electromagnetic focusing shock wave acoustic lens when it is determined that the shock wave parameters and the size of the shock wave focal zone meet the preset design requirements, so as to manufacture the electromagnetic focusing shock wave acoustic lens according to the target design parameters.

6. The design device according to claim 5, characterized in that When the three-dimensional model building module is used to input the initial design parameters into the acoustic wave mathematical model to build a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain the three-dimensional model of the acoustic lens, the three-dimensional model building module is further used to: Based on the geometric relationship and constraint equations of the acoustic wave mathematical model, a nonlinear differential equation group is established using the initial design parameters; Solving the nonlinear differential equations to obtain a numerical solution of the inner curve of the acoustic lens and a numerical solution of the outer curve of the acoustic lens; The three-dimensional model of the acoustic lens is constructed according to the numerical solution of the inner curve of the acoustic lens, the numerical solution of the outer curve of the acoustic lens, and the thickness of the acoustic lens.

7. The design device according to claim 5, characterized in that The design device further includes a first parameter adjustment module, wherein the first parameter adjustment module is configured to: When the simulated focal position is different from the theoretical focal position, the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the planar vibration plate is adjusted, and the step of inputting the initial design parameters into the sound wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens is returned to, until the simulated focal position is the same as the theoretical focal position.

8. The design device according to claim 5, characterized in that The design device further includes a second parameter adjustment module, wherein the second parameter adjustment module is configured to: When it is determined that the shock wave parameters and the shock wave focal zone size do not meet the preset design requirements, the acoustic lens thickness and the theoretical focal position in the initial design parameters are adjusted, and the process returns to the step of inputting the initial design parameters into the acoustic wave mathematical model to establish a three-dimensional model of the electromagnetic focused shock wave acoustic lens to obtain a three-dimensional model of the acoustic lens, until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

9. An electronic device, characterized in that: include: A processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor and the memory communicate via the bus. When the processor is running, the machine-readable instructions execute the steps of the method for designing an electromagnetic focused shock wave acoustic lens as described in any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for designing an electromagnetic focusing shock wave acoustic lens according to any one of claims 1 to 4 are executed.

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