A high intensity focused ultrasound transducer and focusing method

Abstract

The present invention relates to the technical field of ultrasonic transducers, and discloses a high-intensity focused ultrasonic transducer and a focusing method, including: a focusing ceramic sheet, one side of which is concave and the other side of which is convex; the focusing ceramic sheet is a curved structure or a tile-like structure; the side of the concave surface of the focusing ceramic sheet is provided with an acoustic lens, or the focusing ceramic sheet is provided in a shell. The structure of the present invention is simple, and when used, there is no need to set up a structure that fits the skin separately. An acoustic lens or a coupling agent filled in the shell can be used to fit the skin, and the focus acts on the inner side of the skin to achieve a therapeutic effect; in the field of atomization, it can atomize liquids with high viscosity such as essential oils, and changing the height of the acoustic lens can adapt to liquids with different liquid levels; through the focusing method, the minimum output power during operation can be set according to different ultrasound subjects, and the working power of the focused ultrasonic transducer can be reduced to achieve the purpose of treatment and atomization, and realize precise gear adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic transducers, and more specifically, to a high-intensity focused ultrasonic transducer and a focusing method. Background Art

[0002] Ultrasonic focused transducers are widely used in medicine, cosmetology, geology, industry, measurement and other fields; more and more ultrasonic focused transducers are developed in the market.

[0003] In the field of atomizers, traditional atomizers generally use the vibration effect of ultrasound for atomization. Therefore, the essential oil needs to be diluted with water before it can be atomized and can only be atomized on the surface. The essential oil diluted with water is easy to deteriorate. If the deteriorated essential oil is atomized, it will affect human health; and the essential oil that is not diluted with water is a liquid with high viscosity, and the atomization effect of such a liquid is poor. In order to atomize the liquid with high viscosity, it is necessary to develop a focusing transducer to atomize the liquid with high viscosity, which can atomize the essential oil without adding water to achieve a better atomization effect; and this focusing transducer can also be used in the medical field for high-intensity focused therapy. Therefore, it is necessary to propose a high-intensity focused ultrasonic transducer and a focusing method to at least partially solve the problems existing in the prior art. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a high-intensity focused ultrasound transducer, comprising: a focusing ceramic sheet, one side of which is concave and the other side of which is convex; the focusing ceramic sheet is a curved structure or a tile-like structure;

[0006] The focusing ceramic sheet is provided with an acoustic lens on one side of the concave surface, or the focusing ceramic sheet is arranged in a housing.

[0007] Preferably, the side of the acoustic lens connected to the focusing ceramic sheet is a convex surface, and the other side of the acoustic lens is a flat surface.

[0008] Preferably, the acoustic lens is made of one of metal materials, plastic or inorganic non-metallic materials.

[0009] Preferably, the medium between the concave surface of the focusing ceramic sheet and the housing is used as a lens.

[0010] Preferably, when the focusing ceramic sheet adopts a curved surface structure, the outer shell is cylindrical, and the material of the outer shell is rubber material or plastic.

[0011] Preferably, when the focusing ceramic sheet adopts a tile-shaped structure, the outer shell is a rectangular frame, and the material of the outer shell is plastic or metal.

[0012] Preferably, the focusing ceramic sheet is divided into a plurality of arc units along a symmetric center line of the arc-shaped cross section of the focusing ceramic sheet, each arc unit corresponds to an ultrasonic transmitting unit; the curvatures of the plurality of arc units are the same, or the curvatures of the plurality of arc units are different.

[0013] Preferably, the structure of the plurality of arc-shaped units of the focusing ceramic sheet is optimized, including:

[0014] Determining design parameters of the arc unit, wherein the design parameters of the arc unit include the horizontal width and vertical height of the outer arc surface of each arc unit;

[0015] Set the genetic algorithm parameters and randomly generate the initial population; the genetic algorithm parameters include population size, individual size, crossover probability, mutation probability and maximum number of iterations;

[0016] The randomly generated initial population is input into a pre-built finite element model of a focusing ceramic piece, and a finite element simulation numerical simulation is performed;

[0017] According to the structure of the focusing ceramic sheet, an objective function related to ultrasonic focusing is constructed, and the objective function is solved by finite element numerical simulation;

[0018] The fitness is calculated using the solution of the objective function, and then the fitness is used to determine whether the number of iterations meets the termination conditions. If not, a new population is generated through selection, mutation and crossover through the optimization of the genetic algorithm and then input into the pre-built finite element model of the focusing ceramic sheet to continue iteration. If so, the optimized design parameters are output.

[0019] A focusing method for a high-intensity focused ultrasound transducer, comprising:

[0020] According to the type of the subject to be ultrasounded, predict the minimum ultrasound intensity at the focus when ultrasound is focused;

[0021] Determine whether the minimum ultrasonic intensity can have a preset effect on the ultrasonic subject. If not, adjust the output power of the ultrasonic transmitting unit according to the target ultrasonic intensity required for the ultrasonic subject to achieve the preset effect, so that the minimum ultrasonic intensity reaches the target ultrasonic intensity, and the output power of the corresponding ultrasonic transmitting unit is the minimum output power during operation; if so, the minimum output power set by the ultrasonic transmitting unit is the minimum output power during operation.

[0022] Preferably, if the minimum ultrasonic wave intensity can have a preset effect on the subject to be ultrasounded, then the position information of the focus in the subject to be ultrasounded is continued to be determined;

[0023] Determining minimum liquid level information of the subject to be ultrasound-assisted according to the position information of the focus in the subject to be ultrasound-assisted;

[0024] According to the minimum liquid level information of the subject to be ultrasonicated, the initial liquid level information of the subject to be ultrasonicated is set so that the subject to be ultrasonicated can be atomized;

[0025] Determine the position information of the focus in the subject to be ultrasounded, including:

[0026] The ultrasonic wave transmitting unit transmits pulsed ultrasonic waves to the subject to be ultrasonicated, and at the same time, the ultrasonic wave receiving unit receives the ultrasonic wave pulse signal;

[0027] The control unit determines whether the focus is in the body to be ultrasounded based on the average amplitude of the received ultrasonic pulse signal. If so, the position information of the focus in the body to be ultrasounded can be determined. If not, the liquid level of the body to be ultrasounded is raised, and then the position information of the focus in the body to be ultrasounded is determined.

[0028] Preferably, according to the type of the subject to be ultrasounded, predicting the minimum ultrasound intensity at the focus when ultrasound is focused comprises:

[0029] Pre-obtaining the ultrasonic attenuation parameters of each type of subject to be ultrasounded and the distance that the ultrasonic wave can pass through when the ultrasonic wave is focused in the subject to be ultrasounded of various types;

[0030] Among them, when applied in the field of atomization, the main body to be ultrasonicated is a liquid such as essential oil or water, and the ultrasonic attenuation parameter and the distance that the ultrasonic wave can pass through are related to the material properties of the main body to be ultrasonicated and the amount of bubbles contained therein;

[0031] When applied in the medical field, the subject to be ultrasound is human skin, and the ultrasound attenuation parameters and the distance that ultrasound can penetrate are related to the age of the person;

[0032] Determine the minimum ultrasonic intensity at the focus according to the ultrasonic attenuation parameter of the subject to be ultrasonicated and the distance that the ultrasonic wave can pass through;

[0033] The acquired minimum ultrasonic wave intensity at the focus corresponding to each type of subject to be ultrasonicated is stored.

[0034] Compared with the prior art, the present invention has at least the following beneficial effects:

[0035] The high-intensity focused ultrasound transducer and focusing method of the present invention, when applied in the medical field, such as a beauty instrument, can fit one side of the acoustic lens plane to the skin surface, and the focus acts on the inner side of the skin, thereby achieving beauty and treatment effects. Unlike the prior art, the structure of the ultrasonic transducer in the existing beauty instrument is relatively complex, while the structure of the ultrasonic transducer in the present invention is simple, and there is no need to set up a separate structure to fit the skin. The acoustic lens or the coupling agent filled in the shell can be directly used to fit the skin, thereby reducing the attenuation of the ultrasonic wave, achieving a better focusing effect, and reducing the working power of the medical instrument.

[0036] When applied in the field of atomization, it can realize atomization of liquids with high viscosity such as essential oils, and changing the height of the acoustic lens can adapt to liquids with different liquid levels. In addition, the atomization process is environmentally friendly and safe, and it prevents liquids such as essential oils from deteriorating after being diluted with water and causing harm to the human body. The ultrasonic transducer of the present invention has a simple structure, is flexible and easy to use;

[0037] Through the focusing method, the minimum output power of the ultrasonic transmitting unit can be set according to different subjects to be ultrasounded, thereby reducing the working power of the focused ultrasonic transducer, achieving energy saving and realizing more precise gear adjustment.

[0038] The high-intensity focused ultrasound transducer and focusing method described in the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 It is a schematic diagram of the connection structure between the focusing ceramic sheet in the high-intensity focused ultrasound transducer of the present invention and the acoustic lens when the focusing ceramic sheet is a curved surface structure;

[0041] Figure 2 It is a schematic diagram of the decomposed structure of the focusing ceramic sheet and the acoustic lens in the high-intensity focused ultrasound transducer of the present invention when the focusing ceramic sheet is a curved surface structure;

[0042] Figure 3 It is a schematic diagram of the connection structure between the focusing ceramic sheet in the high-intensity focused ultrasound transducer of the present invention and the acoustic lens when the focusing ceramic sheet is in a tile-like structure;

[0043] Figure 4 It is a schematic diagram of the decomposed structure of the focusing ceramic sheet and the acoustic lens in the high-intensity focused ultrasound transducer of the present invention when the focusing ceramic sheet is a tile-shaped structure;

[0044] Figure 5 It is a schematic diagram of the connection structure between the focusing ceramic sheet in the high-intensity focused ultrasound transducer of the present invention and the cylindrical shell when the focusing ceramic sheet is a curved structure;

[0045] Figure 6 It is a schematic diagram of the cross-sectional structure of the focusing ceramic sheet and the cylindrical shell in the high-intensity focused ultrasound transducer of the present invention when the focusing ceramic sheet is a curved structure;

[0046] Figure 7 It is a schematic diagram of the connection structure between the focusing ceramic sheet in the high-intensity focused ultrasound transducer of the present invention and the rectangular frame when the focusing ceramic sheet is a tile-shaped structure;

[0047] Figure 8 It is a schematic diagram of the cross-sectional structure of the focusing ceramic sheet in the high-intensity focused ultrasound transducer of the present invention when the focusing ceramic sheet is a tile-shaped structure and a rectangular frame;

[0048] Fig. 9 It is a schematic cross-sectional structure diagram of an arc-shaped unit of a focusing ceramic sheet in the high-intensity focused ultrasound transducer of the present invention;

[0049] Fig.10 A schematic diagram of coordinates of a focus and a position adjacent to the focus in the high-intensity focused ultrasound transducer of the present invention;

[0050] Fig.11 The figure is a flow chart of the focusing method of the high intensity focused ultrasound transducer according to the present invention. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0052] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0053] like Figure 1-Figure 8 As shown, the present invention provides a high-intensity focused ultrasound transducer, comprising: a focusing ceramic sheet 1, one side of which is concave and the other side opposite to it is convex; the focusing ceramic sheet 1 is a curved structure or a tile-like structure;

[0054] The focusing ceramic sheet 1 is provided with an acoustic lens 2 on one side of the concave surface, or the focusing ceramic sheet 1 is arranged in a housing.

[0055] The sound wave enters from the convex side of the focusing ceramic sheet 1 and is focused by being emitted from the concave side thereof, so that the sound wave generates very high heat and ultrasonic intensity at a certain point; when applied in the field of atomization, its focusing area is long in the length direction, so that during atomization, the focused heat and ultrasonic intensity can act on the inside of the liquid, not limited to the surface of the liquid, so that the liquid is atomized, which is conducive to the atomization of high-concentration essential oils;

[0056] like Figure 2 and Figure 4 As shown, further, one side of the acoustic lens 2 connected to the focusing ceramic sheet 1 is a convex surface, and the other side of the acoustic lens 2 is a flat surface.

[0057] When used in the medical field, such as a beauty instrument, one side of the plane of the acoustic lens 2 can be fitted to the skin surface, and the focus acts on the inner side of the skin to achieve a beauty effect. Unlike the prior art, the ultrasonic transducer structure in the existing beauty instrument is relatively complex, while the ultrasonic transducer in the present invention has a simple structure and does not need to be separately provided with a structure that fits the skin. The acoustic lens 2 that also has a focusing function can be directly used to fit the skin, thereby reducing the attenuation of ultrasonic waves, achieving a better focusing effect, and reducing the working power of the medical instrument.

[0058] Furthermore, the acoustic lens 2 is made of one of metal materials, plastic or inorganic non-metallic materials.

[0059] When the acoustic lens 2 is arranged on the concave side of the focusing ceramic sheet 1, the acoustic lens 2 and the focusing ceramic sheet 1 jointly realize the focusing of the sound wave, and changing the height of the acoustic lens 2 can change the position of the focal point, so that when atomizing liquids with different liquid levels, an acoustic lens 2 with a suitable height can be selected;

[0060] Furthermore, by changing the height of the acoustic lens 2, the depth of the focal point acting on the inner layer of the skin can be adjusted, thereby achieving a better cosmetic effect.

[0061] Furthermore, the medium between the concave surface of the focusing ceramic sheet 1 and the outer shell is used as an acoustic lens.

[0062] When the focusing ceramic sheet 1 is arranged in the housing, the housing is used to fix the focusing ceramic sheet 1;

[0063] When used in the field of atomization, when atomizing the liquid, the space formed by the outer shell and one side of the concave surface of the focusing ceramic sheet 1 will be filled with liquid (medium), so that it can be used as a lens to play a focusing role;

[0064] When used in the medical field, a coupling agent (a medium such as skin care products, such as essence) is injected into the space formed by the outer shell and one side of the concave surface of the focusing ceramic sheet 1. The coupling agent is attached to the skin, so that the coupling agent is used as a lens to play a focusing role.

[0065] By changing the height of the acoustic lens 2, or changing the distance between the concave surface of the focusing ceramic plate 1 and the end surface of the housing, the position of the focal point after focusing can be changed;

[0066] When used as a beauty product, a relatively simple structure can be adopted to achieve a better focusing effect, and the focus position can be easily changed, so the use is more flexible and a better beauty effect can be achieved;

[0067] During atomization, it can adapt to liquids with different liquid level heights and can realize atomization of liquids with high viscosity such as essential oils. In addition, the atomization process is environmentally friendly and safe, and can prevent liquids such as essential oils from deteriorating after being diluted with water and causing effects on the human body. The ultrasonic transducer of the present invention has a simple structure and is flexible and easy to use.

[0068] like Figure 5 and Figure 6 As shown, in one embodiment, when the focusing ceramic sheet 1 adopts a curved surface structure, the outer shell is a cylindrical shell 3A, and the material of the outer shell is rubber material or plastic.

[0069] The focusing ceramic sheet 1 and the cylindrical shell 3A can be connected by bonding or clamping. The concave side of the focusing ceramic sheet 1 and the side wall of the cylindrical shell 3A can form a space area so that the medium filled therein can act as a lens (similar to Figure 2 The acoustic lens 2) shown is used.

[0070] like Figure 7 and Figure 8 As shown, in one embodiment, when the focusing ceramic sheet 1 adopts a tile-like structure, the outer shell is a rectangular frame 3B, and the material of the outer shell is plastic or metal.

[0071] The focusing ceramic sheet 1 and the rectangular frame 3B can be connected by bonding or clamping. The concave side of the focusing ceramic sheet 1 and the side wall of the rectangular frame 3B can form a space area so that the medium filled therein can act as a lens (similar to Figure 4 The acoustic lens 2) shown is used.

[0072] like Fig. 9 As shown, in one embodiment, the focusing ceramic sheet 1 is divided into a plurality of arc-shaped units 110 along the symmetric center line of the arc-shaped cross-section of the focusing ceramic sheet 1, and each arc-shaped unit 110 corresponds to an ultrasonic transmitting unit; the curvatures of the plurality of arc-shaped units 110 are the same, or the curvatures of the plurality of arc-shaped units 110 are different.

[0073] The structure of the plurality of arc-shaped units 110 of the focusing ceramic sheet 1 is optimized, including:

[0074] Determine the design parameters of the arc unit 110, wherein the design parameters of the arc unit 110 include the horizontal width and vertical height of the outer arc surface of each arc unit 110 (the horizontal width refers to the vertical height of the outer arc surface of each arc unit 110). Fig. 9 In the horizontal direction, the maximum width of the outer arc surface at the cross section at the left and right ends; the vertical height refers to Fig. 9 The height of the upper and lower ends of the outer arc surface at the cross section in the vertical direction shown);

[0075] Set the genetic algorithm parameters and randomly generate the initial population; the genetic algorithm parameters include population size, individual size, crossover probability, mutation probability and maximum number of iterations;

[0076] Inputting the randomly generated initial population into a pre-built finite element model of the focusing ceramic piece 1, and performing a finite element simulation numerical simulation;

[0077] An objective function related to ultrasonic focusing is constructed according to the structure of the focusing ceramic sheet 1, and the objective function is solved by finite element simulation numerical simulation;

[0078] The fitness is calculated using the solution of the objective function, and then the fitness is used to determine whether the number of iterations meets the termination condition. If not, the new population is generated by selecting, crossing and mutating through the optimization of the genetic algorithm and inputting it into the pre-built finite element model of the focusing ceramic piece 1 to continue the iteration. If yes, the optimized design parameters are output;

[0079] like Fig.10 As shown, the objective function in the iterative process of the genetic algorithm is:

[0080] F 0max =|P(x0,y0)| 2

[0081] F 1min =|P(x0±Δx,y0)| 2

[0082] Among them, F 0max is the ultrasonic intensity parameter at the focus, F 1min Ultrasonic intensity parameters at the position adjacent to the focus, P(x0, y0) is the sound pressure at the focus, (x0, y0) is the coordinate information of the focus, P(x0±Δx, y0) is the sound pressure at the position adjacent to the focus, (x0±Δx, y0) is the coordinate information of the position adjacent to the focus, Δx is the preset distance between the position adjacent to the focus and the focus in the horizontal direction.

[0083] Among them, the square of sound pressure is directly proportional to the sound intensity. Therefore, the sound intensity can be obtained by solving the square of sound pressure as the objective function.

[0084] In order to improve the ultrasonic intensity at the focus of the focusing ceramic sheet 1 and reduce the output power of the ultrasonic transmitting unit, the structure of the focusing ceramic sheet 1 is optimized by using a finite element model and a genetic algorithm to optimize the ultrasonic intensity at the focus during automatic focusing, weaken the ultrasonic intensity next to the focus, and improve the ultrasonic intensity at the focus, thereby reducing the output power of the ultrasonic transmitting unit;

[0085] When performing structural optimization, it is necessary to constrain the convex and concave surfaces of the focusing ceramic sheet 1 to be smooth structural surfaces, constrain the vertical height range and horizontal width range of the arc-shaped cross-section of the focusing ceramic sheet 1, and constrain the horizontal width and vertical height range of each arc unit 110; use a genetic algorithm to iteratively optimize multiple arc units 110, and use the ultrasonic intensity parameters at the focus and the ultrasonic intensity parameters at the position adjacent to the focus as the objective function, so that the ultrasonic intensity at the focus is maximized, and the ultrasonic intensity at the adjacent position at a preset distance from the focus is weakened, thereby reducing the output power of the actual ultrasonic transmitting unit.

[0086] like Fig.11 As shown, a focusing method of a high-intensity focused ultrasound transducer comprises:

[0087] S1. predicting the minimum ultrasound intensity at the focus when ultrasound is focused according to the type of the subject to be ultrasounded;

[0088] S2. Determine whether the minimum ultrasonic intensity can have a preset effect on the subject to be ultrasonicated. If not, adjust the output power of the ultrasonic transmitting unit according to the target ultrasonic intensity required for the subject to be ultrasonicated to achieve the preset effect, so that the minimum ultrasonic intensity reaches the target ultrasonic intensity, and the output power of the corresponding ultrasonic transmitting unit is used as the minimum output power during operation; if so, the minimum output power set by the ultrasonic transmitting unit is used as the minimum output power during operation.

[0089] Among them, when applied in the field of atomization, if the ultrasonic subject is liquid such as essential oil or water, the preset effect is to produce an atomization effect; when applied in the medical field, if the ultrasonic subject is human skin, the preset effect is to have a corresponding beauty effect on human skin, such as tightening the skin.

[0090] Since there are large differences and losses in the propagation of ultrasound in different media, the intensity at the focus of the focused ultrasound transducer is different in different subjects to be ultrasounded; therefore, the above method is used to predict the minimum ultrasound intensity at the focus when the ultrasound is focused, based on the type of the subject to be ultrasounded and when the ultrasound transmitting unit works at a set minimum output power, so as to determine whether the ultrasound transmitting unit can achieve a preset effect on the subject to be ultrasounded when working at the set minimum output power;

[0091] If the subject to be ultrasonicated can achieve the preset effect, it means that the ultrasonic emitting unit can work normally at any output power when it is working; if the subject to be ultrasonicated cannot achieve the preset effect, it means that the ultrasonic emitting unit cannot be used normally when working at the set minimum output power (that is, it cannot produce an atomization effect or cannot achieve the purpose of skin tightening). Therefore, it is necessary to adjust the output power of the ultrasonic emitting unit so that the focus reaches the target ultrasonic intensity, and the output power of the ultrasonic emitting unit at this time is recorded as the minimum output power during work. When performing atomization work or beauty treatment, when adjusting the atomization amount or adjusting the working intensity of the beauty instrument, the output power of the ultrasonic emitting unit cannot be lower than the minimum output power during work;

[0092] Through the above settings, the minimum output power of the ultrasonic transmitting unit when it is working can be set according to different subjects to be ultrasounded, thereby reducing the working power of the focused ultrasonic transducer, achieving the purpose of energy saving and realizing more precise gear adjustment.

[0093] In one embodiment, predicting the minimum ultrasound intensity at the focus when ultrasound is focused according to the type of the subject to be ultrasounded includes:

[0094] Pre-obtaining the ultrasonic attenuation parameter of each type of subject to be ultrasonicated and the distance that the ultrasonic wave can pass through when the ultrasonic wave is focused in the subject to be ultrasonicated of various types; wherein the ultrasonic attenuation parameter and the distance that the ultrasonic wave can pass through are related to the material properties of the subject to be ultrasonicated and the amount of bubbles contained therein;

[0095] Determine the minimum ultrasonic intensity at the focus according to the ultrasonic attenuation parameter of the subject to be ultrasonicated and the distance that the ultrasonic wave can pass through;

[0096] The acquired minimum ultrasonic wave intensity at the focus corresponding to each type of subject to be ultrasonicated is stored.

[0097] Among them, when applied in the field of atomization, the main body to be ultrasonicated is a liquid such as essential oil or water, and the ultrasonic attenuation parameter and the distance that the ultrasonic wave can pass through are related to the material properties of the main body to be ultrasonicated and the amount of bubbles contained therein;

[0098] When applied in the medical field, the subject to be ultrasound is human skin, and the ultrasound attenuation parameters and the distance that the ultrasound can penetrate are related to the age of the person.

[0099] Before acting on the subject to be ultrasounded, the minimum ultrasonic intensity at the focus corresponding to the type of the subject to be ultrasounded can be pre-adjusted, that is, the above-mentioned prediction process;

[0100] The type of the subject to be ultrasonicated is in the field of atomization, i.e., essential oil or water, etc.;

[0101] In the medical field, it refers to the skin of people of different ages;

[0102] The minimum ultrasonic intensity at the focus corresponding to the type of subject to be ultrasounded is related to the attenuation parameters of the ultrasonic wave in the subject and the distance that it can pass through. Therefore, when working at the minimum output power, the minimum ultrasonic intensity at the focus of the focused ultrasonic transducer in each type of subject to be ultrasounded can be obtained and stored, so that it can be directly retrieved during work, thereby predicting the minimum ultrasonic intensity at the focus when the ultrasonic wave is focused based on the type of subject to be ultrasounded.

[0103] In one embodiment, when the above-mentioned focusing method is applied in the field of atomization, if the minimum ultrasonic intensity can have a preset effect on the subject to be ultrasonicated, the position information of the focus in the subject to be ultrasonicated is continued to be determined;

[0104] Determining minimum liquid level information of the subject to be ultrasound-assisted according to the position information of the focus in the subject to be ultrasound-assisted;

[0105] According to the minimum liquid level information of the subject to be ultrasonicated, the initial liquid level information of the subject to be ultrasonicated is set so that the subject to be ultrasonicated can be atomized;

[0106] Determine the position information of the focus in the subject to be ultrasounded, including:

[0107] The ultrasonic wave transmitting unit transmits pulsed ultrasonic waves to the subject to be ultrasonicated, and at the same time, the ultrasonic wave receiving unit receives the ultrasonic wave pulse signal;

[0108] The control unit determines whether the focus is in the body to be ultrasounded based on the average amplitude of the received ultrasonic pulse signal. If so, the position information of the focus in the body to be ultrasounded can be determined. If not, the liquid level of the body to be ultrasounded is raised, and then the position information of the focus in the body to be ultrasounded is determined.

[0109] In addition, since the refractive index of ultrasound waves in different media is also different, the focal position when focusing is also different. It is necessary to obtain the minimum liquid level information (i.e., the minimum liquid level height) of the subject to be sonicated based on the position information of the focus in the subject to be sonicated. In this way, when atomizing, the minimum liquid level information of the subject to be sonicated is used as the limit height of adding liquid to remind people to add liquid to the container containing the subject to be sonicated to ensure normal atomization.

[0110] In addition, the initial liquid level information of the subject to be ultrasonicated can also be determined to prevent the initial liquid level height from being too close to the minimum liquid level height, thereby requiring frequent addition of liquid, which can further improve the user experience.

[0111] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0112] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0113] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A high intensity focused ultrasound transducer, characterized in that: include: A focusing ceramic sheet (1) having a concave surface on one side and a convex surface on the other side opposite thereto; the focusing ceramic sheet (1) is a curved surface structure or a tile-like structure; The focusing ceramic sheet (1) is arranged in the housing; The medium between the concave surface of the focusing ceramic sheet (1) and the outer shell is used as a lens.

2. The high-intensity focused ultrasound transducer according to claim 1, characterized in that: When the focusing ceramic sheet (1) adopts a curved surface structure, the outer shell is a cylindrical shell (3A), and the material of the outer shell is rubber material or plastic.

3. The high-intensity focused ultrasound transducer according to claim 1, characterized in that: When the focusing ceramic sheet (1) adopts a tile-shaped structure, the outer shell is a rectangular frame (3B), and the material of the outer shell is plastic or metal.

4. The high-intensity focused ultrasound transducer according to claim 1, characterized in that: The focusing ceramic sheet (1) is divided into a plurality of arc-shaped units (110) along a symmetric center line of the arc-shaped cross section of the focusing ceramic sheet (1), each arc-shaped unit (110) corresponding to an ultrasonic emitting unit; the curvatures of the plurality of arc-shaped units (110) are the same, or the curvatures of the plurality of arc-shaped units (110) are different.

5. A focusing method for a high intensity focused ultrasound transducer according to any one of claims 1 to 4, characterized in that: include: According to the type of the subject to be ultrasounded, predict the minimum ultrasound intensity at the focus when ultrasound is focused; Determine whether the minimum ultrasonic intensity can have a preset effect on the ultrasonic subject. If not, adjust the output power of the ultrasonic transmitting unit according to the target ultrasonic intensity required for the ultrasonic subject to achieve the preset effect, so that the minimum ultrasonic intensity reaches the target ultrasonic intensity, and the output power of the corresponding ultrasonic transmitting unit is the minimum output power during operation; if so, the minimum output power set by the ultrasonic transmitting unit is the minimum output power during operation.

6. The focusing method of a high-intensity focused ultrasound transducer according to claim 5, characterized in that: If the minimum ultrasonic wave intensity can achieve the preset effect on the subject to be ultrasonicated, then continue to determine the position information of the focus in the subject to be ultrasonicated; Determining minimum liquid level information of the subject to be ultrasound-assisted according to the position information of the focus in the subject to be ultrasound-assisted; According to the minimum liquid level information of the subject to be ultrasonicated, the initial liquid level information of the subject to be ultrasonicated is set so that the subject to be ultrasonicated can be atomized; Determine the position information of the focus in the subject to be ultrasounded, including: The ultrasonic wave transmitting unit transmits pulsed ultrasonic waves to the subject to be ultrasonicated, and at the same time, the ultrasonic wave receiving unit receives the ultrasonic wave pulse signal; The control unit determines whether the focus is in the body to be ultrasounded based on the average amplitude of the received ultrasonic pulse signal. If so, the position information of the focus in the body to be ultrasounded can be determined. If not, the liquid level of the body to be ultrasounded is raised, and then the position information of the focus in the body to be ultrasounded is determined.

7. The focusing method of a high-intensity focused ultrasound transducer according to claim 5, characterized in that: Based on the type of subject to be ultrasounded, the minimum ultrasound intensity at the focus when ultrasound is focused is predicted, including: Pre-obtaining the ultrasonic attenuation parameters of each type of subject to be ultrasounded and the distance that the ultrasonic wave can pass through when the ultrasonic wave is focused in the subject to be ultrasounded of various types; Determine the minimum ultrasonic intensity at the focus according to the ultrasonic attenuation parameter of the subject to be ultrasonicated and the distance that the ultrasonic wave can pass through; The acquired minimum ultrasonic wave intensity at the focus corresponding to each type of subject to be ultrasonicated is stored.

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