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

Abstract

The invention provides a design method and device for an electromagnetic focusing shock wave acoustic lens, and the method comprises the steps: inputting initial design parameters into an acoustic mathematical model, and carrying out the building of a three-dimensional model of the electromagnetic focusing shock wave acoustic lens, and obtaining a three-dimensional model of the acoustic lens; obtaining a sound pressure time domain curve of each measurement point outside the electromagnetic focusing shock wave sound lens through finite element simulation, and taking the measurement point with the highest sound pressure amplitude in the plurality of measurement points as a simulation focus position; shock wave parameters and a shock wave focal region size are calculated based on the sound pressure time domain curve of each point outside the electromagnetic focusing shock wave sound lens; and determining 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 so as to manufacture the electromagnetic focusing shock wave acoustic lens through the target design parameters. Through the method and the device, the design precision of the electromagnetic shock wave focusing acoustic lens is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic focused shock wave technology, 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 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 affecting the focusing effect of sound waves. Existing studies have proposed a design scheme for the sound wave propagation path that includes three media: vibrating plate-water-acoustic lens-human tissue. The core of this scheme is that the shape of the acoustic lens can effectively focus the sound waves. However, most current acoustic lens designs only consider the geometric focus after the refraction of the sound rays under Snell's law, and use arc structures at both ends to achieve the focusing of the shock wave. This method does not fully consider the wave interference effect during sound propagation, resulting in an inaccurate focus position. Summary of the invention

[0004] In view of this, the purpose of this application is to provide a design method and design device for an electromagnetic focused shock wave acoustic lens, by establishing a mathematical model of the propagation and refraction of sound waves in various media, after determining the thickness and theoretical focal position, using finite element simulation to calculate the simulated focal position and shock wave parameters, and determining the shape of the acoustic lens in which the theoretical focus and the actual focus coincide, to ensure that the sound wave is focused at the specified position. The design accuracy of the electromagnetic shock wave focused acoustic lens is improved, and the therapeutic effect of the electromagnetic focused shock wave therapy is also improved.

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

[0006] Acquire initial design parameters of an electromagnetic focused shock wave acoustic lens, and input 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 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 a variety of 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;

[0007] The three-dimensional model of the acoustic lens is imported into a finite element calculation model, and a time-domain curve of the sound pressure at each measuring point outside the electromagnetic focused shock wave acoustic lens is obtained by finite element simulation, and the measuring point with the highest sound pressure amplitude among the multiple measuring points is taken 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 area size are calculated based on the time domain curve of the sound pressure at each point outside the electromagnetic focusing 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 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, 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 equation group 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 also includes:

[0015] When the simulated focal position is different from the theoretical focal position, adjust the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the plane vibration plate, and return to the step of inputting the initial design parameters into the sound 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, until the simulated focal position is the same as the theoretical focal position.

[0016] Furthermore, the design method also 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 step of inputting the initial design parameters into the 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 is returned to the step until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

[0018] In a second aspect, the present application also provides a design device for an electromagnetic focusing shock wave acoustic lens, the design device comprising:

[0019] A three-dimensional model building module is used to obtain initial design parameters of the electromagnetic focusing shock wave acoustic lens, and input the initial design parameters into the acoustic wave mathematical model to build 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 plane vibrating plate, the acoustic wave mathematical model is set with a variety of 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;

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

[0021] A parameter calculation module, used for calculating shock wave parameters and shock wave focal area size based on the sound pressure time domain curve of each point outside the electromagnetic focusing shock wave acoustic lens when the simulated focal position is the same as the theoretical focal position;

[0022] The 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 the target design parameters of the electromagnetic focusing shock wave acoustic lens when it is judged 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.

[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 equation group 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, wherein the first parameter adjustment module is used to:

[0028] When the simulated focal position is different from the theoretical focal position, adjust the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the plane vibration plate, and return to the step of inputting the initial design parameters into the sound 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, 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, and the second parameter adjustment module is used 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 step of inputting the initial design parameters into the 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 is returned to the step 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, and 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 focusing 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, and 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 vibration plate, the acoustic wave mathematical model is set with a variety of 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 three-dimensional model of the acoustic lens is obtained by the finite element calculation model. The time-domain curve of the sound pressure of each measuring point outside the electromagnetic focusing shock wave acoustic lens is obtained through finite element simulation, and the measuring point with the highest sound pressure amplitude among the multiple measuring 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 area size are calculated based on the time-domain curve of the sound pressure of each point outside the electromagnetic focusing shock wave acoustic lens; finally, when it is judged that the shock wave parameters and the shock wave focal area 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.

[0034] This application establishes a mathematical model of the propagation and refraction of sound waves in various media. After determining the thickness and theoretical focal position, the finite element simulation is used to calculate the simulated focal position and shock wave parameters, and the shape of the acoustic lens in which the theoretical focus coincides with the actual focus is determined to ensure that the sound wave is focused at the specified position. In this way, the design accuracy of the electromagnetic shock wave focusing acoustic lens is improved, the offset of the electromagnetic focusing shock wave focal position is reduced, the focusing performance is improved, and the therapeutic effect of the electromagnetic focusing shock wave therapy is also improved.

[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 specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

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

[0038] Figure 2 A structural diagram 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 focusing 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 focusing 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] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme 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 usually 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 claimed for protection, 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 belongs to the scope of protection of the present application.

[0044] First, the application scenarios to which the present application is applicable are introduced. The present application can be applied to 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 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 affecting the focusing effect of sound waves. Existing studies have proposed a design scheme for the sound wave propagation path that includes three media: vibrating plate-water-acoustic lens-human tissue. The core of this scheme is that the shape of the acoustic lens can effectively focus the sound waves. However, most current acoustic lens designs only consider the geometric focus after the refraction of sound rays under Snell's law, and use arc structures at both ends to achieve the focusing of shock waves. This method does not fully consider the wave interference effect during sound propagation, resulting in an 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 of 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 focusing 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 focusing shock wave acoustic lens, thereby obtaining a three-dimensional model of the acoustic lens.

[0050] Here, the initial design parameters include the thickness of the acoustic lens l, the theoretical focal position f, and the angle α between the initial emission direction of the sound wave and the radial direction of the plane vibration plate. Specifically, in the 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 the maximum value after passing through the acoustic lens. The focal position is a key parameter in the design of the acoustic lens, which directly affects the focusing effect and application effect of the shock wave. The angle α between the initial emission direction of the sound wave and the radial direction of the plane vibration plate is related to the parameters of the plane vibration plate and the coil parameters, and is a parameter affected by the coupling of multiple physical factors.

[0051] In the embodiments provided in the present application, a plurality of media for sound wave propagation are set in the mathematical model of sound waves. Here, as an example, the mathematical model of sound waves may include three media for sound wave propagation, medium 1 is a cooling medium, medium 2 is an acoustic lens material, and medium 3 is human tissue. The sound waves emitted by the vibrating plate enter the acoustic lens after passing through medium 1. The function of medium 1 cooling medium is to conduct the sound waves and cool the vibrating plate and the coil. The function of medium 2 acoustic lens material is to focus the sound waves emitted by the vibrating plate. Medium 3 human tissue is the target action area of ​​the shock wave.

[0052] For the above step S101, in the specific implementation, the design parameters of the electromagnetic focusing shock wave acoustic lens are first preliminarily set to obtain the initial design parameters of the electromagnetic focusing shock wave acoustic lens, including the thickness l of the acoustic lens, the theoretical focal position f, and the angle α between the initial emission direction of the acoustic wave and the radial direction of the plane vibrating plate. Then, the obtained initial design parameters are input into the pre-constructed 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.

[0053] See also Figure 2 , Figure 2 This is a diagram of 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 f of the acoustic lens. 1 (x), the outer curve of the acoustic lens f 2 (x) and the thickness of the acoustic lens l, the shape of the acoustic lens can be determined according to the inner curve f of the acoustic lens. 1 The numerical solution of (x), the outer curve of the acoustic lens f 2 The three-dimensional model is established by the numerical solution of (x) and the thickness of the acoustic lens l, so 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. The acoustic lens is a rotating body symmetrical along the central axis. The design of the acoustic lens can focus the sound waves on the central axis in the tissue domain. The focal position, the energy flux density of the shock wave focus and the size parameters of the shock wave focal area will directly affect the treatment effect. Therefore, it is necessary to accurately design the acoustic lens so that the shock wave can achieve the required effect at the specified position.

[0054] See also Figure 3 , Figure 3 A schematic diagram of a mathematical model of an electromagnetic focused shock wave provided in an embodiment of the present application. Figure 3 As shown, the initial direction of the sound wave emission is set to be vertically upward, at any point O on the x-axis. 1 Emit a vertical sound ray into medium 1 (the speed of sound is c 1 , density is ρ 1 ). The curve f under the acoustic lens 1 (x) and then refraction occurs, the incident angle is at point A and f 1 The angle of the normal direction of (x) is offset by a certain angle. The offset angle can be known according to Snell's theorem. Then 2 (x) intersects point B and refracts again, eventually converging at focus F. Under this mathematical model, all rays emitted on the x-axis should reach focus F at the same time, and the trajectory of the sound ray is O 1 ABF. The y-axis is the geometric center axis of the acoustic lens rotating body, and the x-axis is the radial direction of the vibration plate. Coordinates of each point: O point (0,0) is the origin of the coordinates; O 1Point (m,0) is any point on the x-axis that emits sound rays; point A (m,f 1 (m)) is the intersection point where the sound ray enters the sound lens from the water; point B (n,f 2 (n)) is the intersection point where the acoustic ray enters the human tissue from the acoustic lens; 2 (0, l) is the focal point of the acoustic lens thickness and the center seed line; F (0, f) is the set theoretical focal point. θ 1 is the incident angle of the sound ray at point A; θ` 1 θ is the angle of departure of the sound ray at point A. 2 is the incident angle of the sound ray at point B; θ` 2 is the angle of departure of the sound ray at point B. α is the angle between the initial emission direction of the sound wave and the x-axis. After the mathematical model is established, three constraints are added: According to Snell's theorem, two adjacent media will refract due to the different sound speeds of the media; due to the wave properties of sound waves, it is necessary to avoid the situation where the sound waves cancel each other out when they converge at the focus.

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

[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] In the specific implementation of step 1011, according to the geometric relationship and constraint equations of the constructed acoustic wave mathematical model, a nonlinear differential equation group is established using the initial design parameters l, f, and α. Here, the nonlinear differential equation group is the initial input conditions l, f, and α, and the independent variable x is about f 1 (x), f 2 (x), f' 1 (x), f' 2 (x) is a system of nonlinear differential equations.

[0058] Step 1012, solving the nonlinear differential equation group 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] In the specific implementation of the above steps 1012 to 1013, the nonlinear differential equations constructed in the above step 1011 are solved. Specifically, the nonlinear differential equations are solved by mathematical calculation software to obtain the inner curve f of the acoustic lens. 1 The numerical solution of (x) and the outer curve f of the acoustic lens 2 (x). At this time, the shape of the acoustic lens can be based on the curve f 1 The numerical solution of (x), the outer curve of the acoustic lens f 2 The three-dimensional model of the acoustic lens is established by using the numerical solution of (x) and the thickness l 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 sound pressure at each measuring point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and taking the measuring point with the highest sound pressure amplitude among the multiple measuring points as the simulation focal position.

[0062] The principle of electroacoustic energy conversion of electromagnetic focused shock waves is to use an oscillating current to excite the coil, and the coil and the vibrating plate generate mutual inductance, and a mutual inductance current is generated inside the vibrating plate. Under the action of the mutual inductance current generated by itself and the magnetic field generated by the coil, the vibrating plate generates electromagnetic force, thereby forming vibration. The greater the coil inductance, the greater the sound intensity of the initial sound wave emitted by the vibrating plate. The initial direction of the sound wave emitted when the vibrating plate vibrates is unknown and can only be calculated based on finite element simulation. Each measurement point outside the electromagnetic focused shock wave acoustic lens refers to the various positions in the space outside the acoustic lens where the sound wave propagates after being focused by the acoustic lens. Specifically, when performing finite element simulation calculations, it is necessary to measure and analyze the sound pressure conditions of each measurement point outside the acoustic lens to evaluate the focusing effect of the sound wave. These measurements include key positions in the sound wave propagation path, such as spatial points near the focus and around the focal area. The sound pressure time domain curve of the measurement point reflects the sound pressure size of the sound wave at different time points. The sound pressure time domain curve can be used to evaluate the sound pressure distribution of the sound wave at different positions, thereby verifying whether the design of the acoustic lens has achieved the expected focusing effect.

[0063] For the above step S102, in the specific implementation, the established three-dimensional model of the acoustic lens is imported into the finite element calculation model, and the assembly structure relationship of each component and the high-frequency pulse current to be input are set at the same time, and the sound pressure time domain curve of each measurement point outside the electromagnetic focused shock wave acoustic lens is obtained through finite element simulation calculation. At this time, the measurement point with the highest sound pressure amplitude in the finite element simulation calculation result is found, and the measurement point with the highest sound pressure amplitude among the multiple measurement points is used as the simulation focus position.

[0064] S103, when the simulated focal position is the same as the theoretical focal position, calculating shock wave parameters and shock wave focal area size based on the sound pressure time domain curve of each point outside the electromagnetic focusing 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 area size may include focal length, focal area depth, focal area width, etc., which is not specifically limited in this application.

[0066] For the above step S103, in the specific implementation, first determine 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 focusing shock wave acoustic lens.

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

[0068] When the simulated focal position is different from the theoretical focal position, adjust the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the plane vibration plate, and return to the step of inputting the initial design parameters into the sound 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, until the simulated focal position is the same as the theoretical focal position.

[0069] For the above steps, when the simulation focus position calculated by the finite element simulation is different from the theoretical focus position in the initial design parameters, it means that the actual emission direction of the sound wave is different from the initial setting. At this time, 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 plane vibration plate, and then return to the execution step S101 to input the initial design parameters into the sound wave mathematical model to establish a three-dimensional model of the electromagnetic focusing shock wave acoustic lens, and obtain the three-dimensional model of the acoustic lens, until the simulation focus position calculated by the finite element simulation is the same as the set theoretical focus position. In this way, through the iterative calculation of the mathematical model and the finite element simulation, the focal position of the shock wave can be clearly determined, and the shape of the acoustic lens in which the theoretical focus and the actual focus coincide 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] For the above step S104, in the specific implementation, after the shock wave parameters and shock wave focal area size calculated in step S103, it is determined whether they meet the preset design requirements. Here, as an example, when the shock wave parameter is the sound pressure peak, the preset design requirements need to ensure that the sound pressure peak is high enough to achieve the expected treatment effect. For example, the sound pressure peak can be set to be greater than 8MPa in the preset design requirements; when the shock wave focal area size includes the focal area depth and focal area width, the preset design requirements need to ensure that the focal area depth and focal area width are moderate, neither too large nor too small, to ensure that the energy is concentrated in the target area. For example, the focal area depth and focal area width can be set to be less than 3mm respectively in the preset design requirements. The shock wave parameters and shock wave focal area size calculated in step S103 are compared with the preset design requirements. Here, continuing the above example, when. The sound pressure peak is 10Mpa, the focal area depth is 2mm, and the focal area width is 2mm, 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 also 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 step of inputting the initial design parameters into the 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 is returned to the step until the shock wave parameters and the shock wave focal zone size meet the preset design requirements.

[0074] For the above steps, when the shock wave parameters and the shock wave focal area size calculated in step S103 cannot meet the design requirements, it is necessary to adjust the acoustic lens thickness and the theoretical focal position in the initial design parameters, and then return to the step S101 to input 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 the three-dimensional model of the acoustic lens, until the shock wave parameters and the shock wave focal area size meet the preset design requirements. In this way, through the iterative calculation of the mathematical model and the finite element simulation, it can be ensured that the shock wave under the current design parameters meets the design requirements, and there are strict requirements on the energy flux density, focal area position and size of the shock wave, so that the acoustic lens generated in the subsequent production is more accurate to avoid 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, firstly, 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 focus of the acoustic lens, the shock wave parameters and the size of the shock wave focal area 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 sound wave in the initial design parameters and the radial direction of the plane vibration plate is adjusted for iterative calculation. If so, it is further judged whether the shock wave parameters and the shock wave focal area parameters meet expectations. If not, the thickness of the acoustic lens 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 the 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 to obtain the 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 plane vibrating plate, the acoustic wave mathematical model is set with a variety of 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 three-dimensional model of the acoustic lens. The time-domain curve of the sound pressure of each measuring point outside the electromagnetic focusing shock wave acoustic lens is simulated, and the measuring point with the highest sound pressure amplitude among the multiple measuring points is taken 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 area size are calculated based on the time-domain curve of the sound pressure of each point outside the electromagnetic focusing shock wave acoustic lens; finally, when it is judged that the shock wave parameters and the shock wave focal area 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 as to manufacture the electromagnetic focusing shock wave acoustic lens according to the target design parameters.

[0077] This application establishes a mathematical model of the propagation and refraction of sound waves in various media. After determining the thickness and theoretical focal position, the finite element simulation is used to calculate the simulated focal position and shock wave parameters, and the shape of the acoustic lens in which the theoretical focus coincides with the actual focus is determined to ensure that the sound wave is focused at the specified position. In this way, the design accuracy of the electromagnetic shock wave focusing acoustic lens is improved, the offset of the electromagnetic focusing shock wave focal position is reduced, the focusing performance is improved, and the therapeutic effect of the electromagnetic focusing shock wave therapy is also improved.

[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] The three-dimensional model building module 501 is used to obtain the initial design parameters of the electromagnetic focusing shock wave acoustic lens, and input the initial design parameters into the acoustic wave mathematical model to build 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 plane vibrating plate, the acoustic wave mathematical model is set with a variety of 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;

[0080] A simulation focus position determination module 502 is used to import the three-dimensional model of the acoustic lens into a finite element calculation model, obtain 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 take 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 is used to calculate shock wave parameters and shock wave focal area size based on the sound pressure time domain curve of each point outside the electromagnetic focusing 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 also 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 equation group 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, wherein the first parameter adjustment module is used to:

[0088] When the simulated focal position is different from the theoretical focal position, adjust the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the plane vibration plate, and return to the step of inputting the initial design parameters into the sound 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, 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, and the second parameter adjustment module is used 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 step of inputting the initial design parameters into the 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 is returned to the step 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 , 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, and the specific implementation method can be found in the method embodiment, which will not be repeated here.

[0093] 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, and the specific implementation method can be found in the method embodiment, which will not be repeated here.

[0094] Those skilled in the art can 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 the present 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 only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

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

[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 can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform 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 protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A design method for an electromagnetic focusing shock wave acoustic lens, characterized in that: The design method comprises: Acquire initial design parameters of an electromagnetic focused shock wave acoustic lens, and input 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 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 a variety of 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; The three-dimensional model of the acoustic lens is imported into a finite element calculation model, and a time-domain curve of the sound pressure at each measuring point outside the electromagnetic focused shock wave acoustic lens is obtained by finite element simulation, and the measuring point with the highest sound pressure amplitude among the multiple measuring points is taken 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 area size are calculated based on the time domain curve of the sound pressure at each point outside 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, 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: The initial design parameters are input 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, including: 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 equation group 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 comprises: When the simulated focal position is different from the theoretical focal position, adjust the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the plane vibration plate, and return to the step of inputting the initial design parameters into the sound 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, 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 comprises: 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 step of inputting the initial design parameters into the 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 is returned to the step 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 used to obtain initial design parameters of the electromagnetic focusing shock wave acoustic lens, and input the initial design parameters into the acoustic wave mathematical model to build 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 plane vibrating plate, the acoustic wave mathematical model is set with a variety of 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; A simulation focus position determination module is used to import the three-dimensional model of the acoustic lens into a finite element calculation model, obtain the sound pressure time domain curve of each measurement point outside the electromagnetic focused shock wave acoustic lens through finite element simulation, and take the measurement point with the highest sound pressure amplitude among the multiple measurement points as the simulation focus position; A parameter calculation module, used for calculating shock wave parameters and shock wave focal area size based on the sound pressure time domain curve of each point outside the electromagnetic focusing shock wave acoustic lens when the simulated focal position is the same as the theoretical focal position; The 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 the target design parameters of the electromagnetic focusing shock wave acoustic lens when it is judged 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.

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 also 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 equation group 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 comprises a first parameter adjustment module, wherein the first parameter adjustment module is used for: When the simulated focal position is different from the theoretical focal position, adjust the angle between the initial emission direction of the sound wave in the initial design parameters and the radial direction of the plane vibration plate, and return to the step of inputting the initial design parameters into the sound 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, 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 comprises a second parameter adjustment module, wherein the second parameter adjustment module is used for: 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 step of inputting the initial design parameters into the 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 is returned to the step 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, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are run by the processor, the steps of the method for designing an electromagnetic focusing shock wave acoustic lens as described in any one of claims 1 to 4 are executed.

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 as claimed in any one of claims 1 to 4 are executed.

Images