Method, device and electronic equipment for simulating ultrasonic knife mist generation

Abstract

The present invention provides a method, device, and electronic device for simulating the generation of mist by an ultrasonic scalpel. The method simulates the simple harmonic oscillation process of an ultrasonic scalpel rod, including calculating the simple harmonic oscillation load and applying the simple harmonic oscillation load to the ultrasonic scalpel rod model and obtaining the deformation of the ultrasonic scalpel rod model; simulates the fluid motion process in the cavitation region of the ultrasonic scalpel rod, including calculating the fluid dynamics of the fluid model and obtaining the flow field; and performs fluid-solid coupling calculations to obtain a simulated cavitation process in the cavitation region of the scalpel rod to simulate the generation of mist by the ultrasonic scalpel. This method simulates the generation of mist by an ultrasonic scalpel by simulating the simple harmonic oscillation process of the ultrasonic scalpel rod and the fluid motion process in the cavitation region of the ultrasonic scalpel rod, and performing fluid-solid coupling analysis. This allows for the prediction and evaluation of the mist generated by the ultrasonic scalpel at the front end of the design process, reducing design trial and error and improving the design efficiency of the ultrasonic scalpel rod.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic scalpels, and in particular to a method, device and electronic equipment for simulating ultrasonic scalpel mist generation. Background Art

[0002] During the operation of an ultrasonic scalpel, when the blade mechanically oscillates at ultrasonic frequencies to cut tissue, the surrounding liquid generates mist under the action of ultrasound. This mist can obstruct the surgeon's line of sight under the laparoscope, thereby affecting the surgical effect and reducing the success rate. Regarding the evaluation of the mist generated by ultrasonic scalpel heads, only a few studies in the relevant art have used experimental observation of the mist to evaluate and determine the differences between different ultrasonic scalpel heads. However, this method of comparing the amount of mist generated by different scalpel heads in actual operation through actual measurement has led to multiple trial and error designs, reducing the efficiency of ultrasonic scalpel head design. Summary of the Invention

[0003] The purpose of the present invention is to provide a method, device and electronic equipment for predicting the generation of mist by an ultrasonic scalpel, so as to simulate the generation of mist by a newly designed ultrasonic scalpel at the design front end through simulation means, reduce design trial and error, and improve the design efficiency of the ultrasonic scalpel.

[0004] The present invention provides a method for simulating the generation of mist by an ultrasonic knife, which includes: simulating the simple harmonic vibration process of an ultrasonic knife rod, including calculating the simple harmonic vibration load and applying the simple harmonic vibration load to an ultrasonic knife rod model and obtaining the deformation of the ultrasonic knife rod model; simulating the fluid motion process in the cavitation area of ​​the blade head of the ultrasonic knife rod, including calculating the fluid dynamics of the fluid model and obtaining the flow field; performing fluid-solid coupling calculations to obtain a simulated cavitation process in the cavitation area of ​​the blade head to simulate the generation of mist by the ultrasonic knife.

[0005] Furthermore, the process of simulating the simple harmonic vibration of the ultrasonic knife rod also includes processing the ultrasonic knife rod model, wherein the processing of the ultrasonic knife rod model includes allocating the model material and dividing the grid according to the shape of the knife rod; the process of simulating the fluid movement process in the cavitation area of ​​the blade head of the ultrasonic knife rod also includes processing the fluid model, wherein the processing of the fluid model includes dividing the grid and refining the grid near the fluid domain of the blade head.

[0006] Furthermore, applying the simple harmonic vibration load to the ultrasonic knife rod model also includes applying the load along the longitudinal direction of the ultrasonic knife rod model and constraining the degrees of freedom in other directions.

[0007] Furthermore, the fluid dynamics of the computational fluid model includes: analyzing transients, selecting materials that generate cavitation, setting up turbulence models, and initializing the flow field.

[0008] Furthermore, the material generated by cavitation includes liquid water and gaseous water; wherein, liquid water is the main phase and gaseous water is the secondary phase.

[0009] The present invention provides a method for evaluating the degree of cavitation of simulated mist generation, the method comprising: evaluating the degree of cavitation of the mist generated by a simulated ultrasonic knife based on the cavitation results obtained from the cavitation process obtained by any of the above methods, wherein the cavitation results include: a cavitation distribution cloud map and / or cavitation values ​​of the knife head.

[0010] Furthermore, if the cavitation result is a cavitation distribution cloud diagram of the blade head, the cavitation degree of the mist generated by the simulated ultrasonic knife is evaluated based on the regional distribution result in the cavitation distribution cloud diagram.

[0011] Furthermore, if the cavitation result is a cavitation value, the cavitation value is the sum of at least two of the following values: a first cavitation value in a preset cavitation area on the first side of the blade, a second cavitation value in a preset cavitation area on the second side of the blade, and a third cavitation value in a preset cavitation area at the tip of the blade; the cavitation degree of the mist generated by the simulated ultrasonic knife is evaluated based on the size of the cavitation value.

[0012] Furthermore, the cavitation value is the volume integral value corresponding to the cavitation bubbles during the cavitation process; wherein, as the volume integral value increases, the degree of cavitation increases.

[0013] The present invention provides a method for designing an ultrasonic scalpel head, which includes: establishing multiple ultrasonic scalpel rod models to be tested; wherein the ultrasonic scalpel head corresponding to each ultrasonic scalpel rod model to be tested is designed with a different bending curvature and / or cutting surface; according to any of the above methods, obtaining the simulated cavitation results corresponding to the cavitation process of the cavitation area of ​​the head of each ultrasonic scalpel rod model to be tested; obtaining the actual cavitation results of each ultrasonic scalpel rod model to be tested; comparing the changing pattern of the simulated cavitation results with the changing pattern of the actual cavitation results; if the changing patterns of the two are consistent, the ultrasonic scalpel rod model corresponding to the minimum value of the simulated cavitation result or the actual cavitation result is the target scalpel head design.

[0014] Furthermore, the simulated cavitation results include: a cavitation distribution cloud diagram of the cutter head and / or cavitation values; the actual cavitation results include: values ​​obtained by photographic observation and / or mist weighing.

[0015] Furthermore, the design of multiple different bending radians includes: obtaining a preset bending radian range; selecting multiple different bending radians from the bending radian range at preset angle intervals; and / or, the design method of the cutting surface includes setting the cutting surface at different positions of the cutting head.

[0016] The present invention provides a device for simulating the generation of mist by an ultrasonic scalpel, which includes: a structural module for simulating the simple harmonic oscillation process of an ultrasonic scalpel rod; a fluid module for simulating the fluid motion process in the cavitation area of ​​the blade head of the ultrasonic scalpel rod; and a coupling module for performing fluid-solid coupling calculations on the structural module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the blade head, so as to simulate the generation of mist by the ultrasonic scalpel.

[0017] The present invention provides a device for evaluating the cavitation degree of simulated mist generation, which includes: a structural module for simulating the simple harmonic oscillation process of an ultrasonic knife rod; a fluid module for simulating the fluid motion process in the cavitation area of ​​the blade head of the ultrasonic knife rod; a coupling module for performing fluid-solid coupling calculations on the structural module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the blade head to simulate the generation of mist by the ultrasonic knife; an evaluation module for obtaining the cavitation results of the simulated cavitation process and evaluating the cavitation degree in the mist generated by the simulated ultrasonic knife; wherein the cavitation results include: a cavitation distribution cloud map and / or a cavitation value of the blade head.

[0018] The present invention provides a device for designing an ultrasonic scalpel head, which includes: a design module for designing an ultrasonic scalpel head with different bending radians and / or cutting surfaces; a structure module for simulating the simple harmonic oscillation process of the ultrasonic scalpel head model to be tested; a fluid module for simulating the fluid motion process of the cavitation area of ​​the scalpel head of the ultrasonic scalpel head model to be tested; a coupling module for performing fluid-solid coupling operation on the structure module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the scalpel head to simulate the ultrasonic scalpel to generate mist; an evaluation module for obtaining cavitation results of the simulated cavitation process and evaluating the degree of cavitation in the mist generated by the simulated ultrasonic scalpel; wherein the cavitation results include: a cavitation distribution cloud map and / or a cavitation value of the scalpel head; an acquisition module for obtaining the actual cavitation results of each of a plurality of ultrasonic scalpel head models to be tested; a comparison module for comparing the change law of the simulated cavitation results of the plurality of ultrasonic scalpel head models to be tested with the change law of the actual cavitation results; and a confirmation module for, if the change laws of the two are consistent, then the ultrasonic scalpel head model corresponding to the minimum value of the simulated cavitation result or the actual cavitation result is the target scalpel head design.

[0019] The present invention provides an electronic device comprising a processor and a memory, wherein the memory stores machine-executable instructions that can be executed by the processor, and the processor executes the machine-executable instructions to implement any of the above-mentioned methods for generating mist using a simulated ultrasonic knife, or any of the methods for evaluating the degree of cavitation in the simulated mist, or any of the methods for designing an ultrasonic knife head.

[0020] The present invention provides a machine-readable storage medium, which stores machine-executable instructions. When the machine-executable instructions are called and executed by a processor, the machine-executable instructions prompt the processor to implement any of the above-mentioned methods for simulating ultrasonic knife mist generation, or any of the methods for evaluating the degree of cavitation in simulated mist generation, or any of the methods for designing an ultrasonic knife head.

[0021] The present invention provides a method, device, and electronic device for simulating mist generation by an ultrasonic scalpel. The method simulates the simple harmonic oscillation process of an ultrasonic scalpel rod, including calculating the simple harmonic oscillation load and applying it to the ultrasonic scalpel rod model to obtain the deformation of the ultrasonic scalpel rod model; simulates the fluid motion process in the cavitation region of the ultrasonic scalpel rod, including calculating the fluid dynamics of the fluid model and obtaining the flow field; and performs fluid-solid coupling calculations to obtain a simulated cavitation process in the cavitation region of the scalpel rod to simulate mist generation by the ultrasonic scalpel. This method simulates mist generation by an ultrasonic scalpel by simulating the simple harmonic oscillation process of the ultrasonic scalpel rod and the fluid motion process in the cavitation region of the ultrasonic scalpel rod, and performing fluid-solid coupling analysis. This allows for predictive evaluation of the mist generation by the ultrasonic scalpel at the front end of the design process, reducing trial and error in design and improving the efficiency of ultrasonic scalpel head design. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A flowchart of a method for simulating ultrasonic scalpel mist generation provided by an embodiment of the present invention;

[0024] Figure 2 A flow chart of a vibration load simulation calculation provided by an embodiment of the present invention;

[0025] Figure 3 A flow chart of a cavitation process simulation calculation provided by an embodiment of the present invention;

[0026] Figure 4 An overall flow chart of a method for predicting mist generation by an ultrasonic scalpel provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of a cavitation distribution cloud diagram of a tool head provided in an embodiment of the present invention;

[0028] Figure 6 A flowchart of a method for designing an ultrasonic scalpel head provided in an embodiment of the present invention;

[0029] Figure 7 A schematic structural diagram of an ultrasonic scalpel provided in an embodiment of the present invention;

[0030] Figure 8 A schematic structural diagram of a device for generating mist by simulating an ultrasonic knife provided in an embodiment of the present invention;

[0031] Figure 9 A schematic structural diagram of a device for evaluating the cavitation degree of simulated mist provided by an embodiment of the present invention;

[0032] Figure 10 A schematic structural diagram of a device for designing an ultrasonic scalpel head according to an embodiment of the present invention;

[0033] Figure 11 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In related technologies, the amount of mist generated by different blades during actual operation is usually measured and compared, which makes it difficult to effectively evaluate the performance of ultrasonic blades at the design stage. This leads to multiple trial-and-error designs and reduces the efficiency of ultrasonic blade design. Based on this, embodiments of the present invention provide a method, device, and electronic device for simulating the generation of mist by an ultrasonic blade. This technology can be applied in scenarios where it is necessary to evaluate the mist generated by an ultrasonic blade and to design ultrasonic blades.

[0036] To facilitate understanding of this embodiment, firstly, a method for generating mist by simulating an ultrasonic knife disclosed in an embodiment of the present invention is introduced. Figure 1 As shown, the method includes the following steps:

[0037] Step S102 , simulating the simple harmonic vibration process of the ultrasonic knife rod, including calculating the simple harmonic vibration load and applying the simple harmonic vibration load to the ultrasonic knife rod model and obtaining the deformation of the ultrasonic knife rod model.

[0038] In actual implementation, the ultrasonic knife rod model can be constructed first through the model software; in order to simulate the oscillation effect of the ultrasonic knife when working, a simple harmonic motion load can be applied to the constructed ultrasonic knife rod. For example, the simple harmonic motion load can be a motion load along the longitudinal direction of the ultrasonic knife rod model, etc.; a simple harmonic vibration load can be designed according to actual needs. When the ultrasonic knife rod model is subjected to a simple harmonic motion load, it will generally produce a certain deformation, and the specific deformation amount can be obtained by calculation.

[0039] Step S104 , simulating the fluid motion process in the cavitation area of ​​the ultrasonic knife head, including calculating the fluid dynamics of the fluid model and obtaining the flow field.

[0040] In actual implementation, a fluid model can be constructed through model software, and the fluid dynamics of the fluid model can be calculated to obtain relevant information about the fluid under specific conditions through computer simulation, so as to use computers instead of test equipment to complete "computational experiments" and provide users with an operating platform for simulating actual working conditions; cavitation can be understood as the process of formation, development and collapse of cavities (cavities) of water mist, water vapor or fog inside the liquid or on the liquid-solid interface when the local pressure in the liquid is reduced; the above-mentioned cavitation area can be understood as the liquid area corresponding to the formation of the cavitation process, and the cavitation area is usually the preset area range where the cutter head and the liquid meet.

[0041] In step S106 , a fluid-solid coupling calculation is performed to obtain a simulated cavitation process in the cavitation area of ​​the blade head to simulate the generation of mist by the ultrasonic scalpel.

[0042] Fluid-structure interaction refers to the interaction and mutual influence between the response of an ultrasonic scalpel (partially submerged in a fluid) and the response of the fluid under the excitation of an applied simple harmonic motion load. This interaction occurs due to repeated momentum and energy exchange at the interface between the fluid and the ultrasonic scalpel tip. In practice, a fluid-structure interaction analysis can be performed on the ultrasonic shank model and the fluid motion process under an applied simple harmonic motion load. This analysis can produce a simulated cavitation process in the cavitation region of the scalpel tip. Because this simulated cavitation process is generally positively correlated with atomization, it can be used to predict the degree of atomization generated by the ultrasonic scalpel tip.

[0043] Specifically, during fluid-solid coupling simulation, the ultrasonic tool rod model and the fluid model need to be connected through a coupling module. During the fluid-solid coupling analysis process, the ultrasonic tool rod model and the fluid model influence and interact with each other, and a simulated cavitation process in the cavitation area of ​​the tool head can be obtained.

[0044] The above-mentioned method for simulating the generation of mist by an ultrasonic scalpel first simulates the simple harmonic oscillation process of the ultrasonic scalpel rod, including calculating the simple harmonic oscillation load and applying the simple harmonic oscillation load to the ultrasonic scalpel rod model and obtaining the deformation of the ultrasonic scalpel rod model. It then simulates the fluid motion process in the cavitation region of the ultrasonic scalpel rod's blade tip, including calculating the fluid dynamics of the fluid model and obtaining the flow field. Finally, a fluid-solid coupling calculation is performed to obtain a simulated cavitation process in the cavitation region of the blade tip to simulate the generation of mist by the ultrasonic scalpel. This method simulates the generation of mist by the ultrasonic scalpel by simulating the simple harmonic oscillation process of the ultrasonic scalpel rod and the fluid motion process in the cavitation region of the ultrasonic scalpel rod's blade tip, and performing a fluid-solid coupling analysis. This allows for the prediction and evaluation of the mist generated by the ultrasonic scalpel at the front end of the design process, reducing design trial and error and improving the efficiency of ultrasonic scalpel head design.

[0045] An embodiment of the present invention discloses another method for simulating the generation of mist by an ultrasonic knife. This method is implemented on the basis of the method of the above embodiment. In this method, the process of simulating the simple harmonic vibration of the ultrasonic knife rod also includes processing the ultrasonic knife rod model, wherein the processing of the ultrasonic knife rod model includes allocating model materials and dividing the grid according to the shape of the knife rod; the process of simulating the fluid movement process in the cavitation area of ​​the blade head of the ultrasonic knife rod also includes processing the fluid model, wherein the processing of the fluid model includes dividing the grid and refining the grid near the fluid domain of the blade head.

[0046] For details, see Figure 2 The flowchart of a vibration load simulation calculation is shown. First, the ultrasonic tool rod model is imported, the fluid area is suppressed, and only the ultrasonic tool rod model is retained. Titanium alloy material can be assigned to the ultrasonic tool rod model through the operation interface. Titanium alloy material generally needs to be customized, mainly including material density value, Young's modulus and Poisson's ratio. For example, titanium alloy TC4 material can be used, where the titanium alloy density is 4500kg / m3. The ultrasonic tool rod model is meshed, and the mesh unit size needs to fit the shape of the ultrasonic tool rod model to ensure calculation accuracy. For example, an unstructured mesh can be used with a mesh size of 0.5mm. The specific settings can be based on actual needs and are not limited here. Figure 3 The flowchart of a cavitation process simulation calculation shown can divide the established fluid model into fluid area grids, and at the same time refine the grid of the fluid domain close to the cutter head to ensure the continuity of the flow field in the flow-intensive area.

[0047] The simple harmonic vibration load is applied to the ultrasonic knife bar model, and the load is also applied along the longitudinal direction of the ultrasonic knife bar model and the degrees of freedom in other directions are constrained. Figure 2As shown in the figure, a simple harmonic vibration load can be applied to the ultrasonic knife rod model in the vibration direction, and the deformation can be finally calculated; for example, a simple harmonic vibration load can be applied to the upper end surface of the ultrasonic knife rod model to simulate the actual vibration of the ultrasonic knife. For another example, the displacement variation equation can be defined as A*sin(2πft); wherein A is the amplitude, f is the vibration frequency, and t is the vibration time; the specific values ​​can be set according to actual needs and are not limited here.

[0048] The computational fluid dynamics of the fluid model includes analyzing transients, selecting materials that generate cavitation, setting up a turbulence model, and initializing the flow field. The materials that generate cavitation include liquid water and vaporous water, with liquid water being the primary phase and vaporous water being the secondary phase.

[0049] In this scheme, the overall flow chart of the prediction method of ultrasonic knife mist generation is as follows Figure 4 As shown in the figure, by establishing the ultrasonic blade head fluid-solid coupling simulation process, the ultrasonic blade head that is designed or needs to be compared can be analyzed and calculated, and the degree of mist generated by the ultrasonic blade can be determined after comparing the simulated cavitation indicators. The ultrasonic blade rod model is simulated for vibration load (such as Figure 2 ), then set up the tool head cavitation process simulation (such as Figure 3 ), and finally perform coupling calculation and analyze the simulation results to obtain the cavitation parameter indicators.

[0050] The above-mentioned method of simulating the generation of mist by an ultrasonic knife clarifies the specific processing process of the ultrasonic knife rod model and the fluid model, as well as the method of applying a simple harmonic vibration load to the ultrasonic knife rod model, and further refines the fluid dynamics content of the computational fluid model. This method simulates the generation of mist by an ultrasonic knife through simulation, so that the mist generated by the ultrasonic knife can be predicted and evaluated at the front end of the design, reducing design trial and error and improving the design efficiency of the ultrasonic knife.

[0051] An embodiment of the present invention discloses a method for evaluating the degree of cavitation of simulated mist generation, the method comprising: evaluating the degree of cavitation of mist generated by a simulated ultrasonic knife based on the cavitation results obtained from the cavitation process obtained by the method of the above embodiment, wherein the cavitation results include: a cavitation distribution cloud map and / or cavitation values ​​of the knife head.

[0052] In actual implementation, the cavitation result can be determined based on the simulated cavitation process obtained during the mist generation process of the simulated ultrasonic scalpel. The cavitation result can specifically be either a cavitation distribution cloud diagram of the blade head or a cavitation value, or both. The cavitation distribution cloud diagram of the blade head can use different colors to represent the cavitation degree of different parts of the blade head to evaluate the cavitation degree of the mist generated by the simulated ultrasonic scalpel. For example, red indicates a high cavitation degree, green indicates a low cavitation degree, etc. The size of the above-mentioned cavitation value can represent the size of the cavitation degree of the mist generated by the simulated ultrasonic scalpel. Specifically, a larger cavitation value indicates a higher cavitation degree, and a smaller cavitation value indicates a lower cavitation degree.

[0053] This method uses the positive correlation between the cavitation process and atomization to evaluate the cavitation degree of the mist generated by the ultrasonic scalpel using the cavitation results of the cavitation process, and then predict and judge the mist generated by the ultrasonic scalpel.

[0054] The embodiment of the present invention discloses another method for evaluating the cavitation degree of the simulated mist. The method is implemented on the basis of the method of the above embodiment. In this method, if the cavitation result is the cavitation distribution cloud map of the blade, the cavitation degree of the simulated ultrasonic knife mist is evaluated based on the regional distribution result in the cavitation distribution cloud map. In specific implementation, during the cavitation process, the cavitation distribution cloud map of the blade can be obtained, such as Figure 5 As shown in the cavitation distribution cloud map, different areas of the cutter head are usually distributed with different colors, and different colors represent different cavitation degrees. For example, red indicates the highest cavitation degree, yellow is the second, green is the third, and so on.

[0055] If the cavitation result is a cavitation value, the cavitation value is the sum of at least two of the following values: a first cavitation value in the preset cavitation area on the first side of the blade, a second cavitation value in the preset cavitation area on the second side of the blade, and a third cavitation value in the preset cavitation area at the tip of the blade; the cavitation degree of the mist generated by the simulated ultrasonic knife is evaluated based on the size of the cavitation value.

[0056] The above-mentioned first side and second side are usually two sides located at different positions of the blade, for example, they can be two opposite sides, etc. Usually, the degree of cavitation at different positions of the blade is also different. For example, the degree of cavitation at the tip of the blade is usually the most severe, and the degree of cavitation at the first and second sides is relatively weak, etc.; when the cavitation value is used to evaluate the cavitation degree of the mist generated by the simulated ultrasonic knife, the method of calculating the cavitation value can be selected according to actual needs. For example, the first cavitation value in the preset cavitation area of ​​the first side of the blade, the second cavitation value in the preset cavitation area of ​​the second side of the blade, and the third cavitation value in the preset cavitation area of ​​the tip of the blade can be obtained, and the sum of any two of these three values ​​can be used as the required cavitation value, or the sum of these three values ​​can be directly used as the required cavitation value; and then the cavitation degree of the mist generated by the simulated ultrasonic knife is evaluated according to the size of the cavitation value after the addition.

[0057] The cavitation value is the volume integral of the cavitation bubbles during the cavitation process; higher volume integral values ​​indicate a higher degree of cavitation. Specifically, after completing the fluid-structure interaction calculation, the volume integral value of the cavitation area of ​​the tool tip can be extracted from the fluid model. A larger volume integral value indicates a higher degree of cavitation, while a smaller volume integral value indicates a lower degree of cavitation.

[0058] The above-mentioned method for evaluating the cavitation degree of simulated mist generation specifically describes the cavitation distribution cloud diagram of the blade head and the cavitation numerical evaluation of the cavitation degree of simulated ultrasonic scalpel mist generation. The evaluation method is more flexible and can meet different application requirements.

[0059] The embodiment of the present invention discloses a method for designing an ultrasonic scalpel head, such as Figure 6 As shown, the method includes:

[0060] Step S602 , establishing a plurality of ultrasonic knife rod models to be tested; wherein the ultrasonic knife head corresponding to each ultrasonic knife rod model to be tested is designed with a different bending radian and / or cutting surface.

[0061] The above-mentioned bending radius can be understood as the angle between the tangent line of the circular arc at the tip of the blade and the center line of the blade rod; the above-mentioned cutting surface can be understood as the resection surface formed after cutting the side of the blade head; in actual implementation, when it is necessary to design an ultrasonic blade head, multiple ultrasonic blade rod models to be tested can be constructed first, and each ultrasonic blade rod model to be tested is designed with a different bending radius, or a different cutting surface, or both the bending radius and the cutting surface are different, which can be flexibly set according to actual needs.

[0062] The design of the above-mentioned multiple different bending radians may include the following steps 1 and 2:

[0063] Step 1: Get the preset bending radius range.

[0064] Step 2: selecting a plurality of different curvatures from a curvature range at preset angle intervals; and / or, the cutting surface is designed by setting the cutting surface at different positions of the cutter head.

[0065] The aforementioned curvature range can be set based on actual needs. For example, based on the structure of existing grip-type blades or blades, the preferred curvature range for the mist-reducing blade design is 0-22°. Within this range, blade base structures with various curvatures can be designed at certain angle intervals, including a 0° case, where the entire blade structure is a straight line.

[0066] In another implementation, see Figure 7 The schematic diagram of the structure of an ultrasonic scalpel shown in the figure shows that after the base structure of the blade is completed, two sets of cutting structural features are made on the blade along the bending direction of the blade to form two cutting surfaces, such as the cutting feature 801 and the cutting feature 802 in the figure. The side where the cutting feature 801 is located is the first side, and the side where the cutting feature 802 (that is, the side that is 180° to the cutting feature 801, that is, the opposite side) is located is the second side. At the same time, a cutting groove 803 is added to the cut surface formed to adapt to different operating techniques during the actual operation. In order to further achieve the defogging effect, the structure of the cutting surface is optimized, that is, the structure gradually widens along the tip of the blade, so that the entire front end area of ​​the blade is thinner. Subsequent simulation and test results show that while ensuring the defogging effect, a thinner blade can also further improve the cutting efficiency. The final preferred defogging blade has a curvature of 14.59°, and the structural cutting feature is composed of two arcs, with the preferred sizes of R37, R5.2 and R39, R8 respectively.

[0067] Step S604: According to the method of the above embodiment, a simulation cavitation result corresponding to the cavitation process of the cavitation area of ​​the blade head of each ultrasonic tool bar model to be tested is obtained.

[0068] The above-mentioned simulated cavitation results include: the cavitation distribution cloud diagram and / or cavitation value of the cutter head; for details, please refer to the relevant description in the aforementioned embodiment and will not be repeated here. After completing the fluid-solid coupling simulation, the degree of cavitation generated by different cutter heads can be compared and quantitatively analyzed. The comparison is mainly based on any one or a combination of the cavitation distribution cloud diagram and cavitation value of the cutter head. Usually, different ultrasonic knife rod models to be tested will have different simulation cavitation results corresponding to the cavitation process in the cavitation area of ​​the cutter head.

[0069] Step S606: obtaining the actual cavitation result of each ultrasonic knife bar model to be tested.

[0070] The actual cavitation results include: values ​​obtained by the photographic observation method and / or the mist weighing method. Specifically, an actual ultrasonic blade rod corresponding to each ultrasonic blade rod model to be tested can be produced, and the actual working process of the ultrasonic blade head can be simulated. The photographic observation method, or the mist weighing method, or a combination of the photographic observation method and the mist weighing method can be used to obtain the actual cavitation results corresponding to each ultrasonic blade rod model to be tested. Among them, the photographic observation method refers to taking a photo of the actual working process and obtaining the cavitation results based on the fog conditions in the image obtained by the photo. The mist weighing method can be understood as weighing the fog generated during the actual working process and obtaining the cavitation results based on the obtained weight. Usually, different ultrasonic blade rod models to be tested have corresponding actual cavitation results.

[0071] Step S608: comparing the variation pattern of the simulated cavitation results with the variation pattern of the actual cavitation results.

[0072] The changing rules of the simulated cavitation results are determined based on the multiple simulated cavitation results obtained, and the changing rules of the actual cavitation results are determined based on the multiple actual cavitation results obtained. For example, within the bending radius range of 0 to 22°, 5 different bending radiuses are selected in sequence at preset angle intervals, and five corresponding ultrasonic tool rod models to be tested are designed. The five simulated cavitation results corresponding to the five ultrasonic tool rod models to be tested are usually not the same. As the bending radius changes, the changing rules of the corresponding five simulated cavitation results and the corresponding five actual cavitation results can be determined.

[0073] In step S610 , if the change patterns of the two are consistent, the ultrasonic tool holder model corresponding to the minimum value of the simulated cavitation result or the actual cavitation result is the target tool head design.

[0074] If the variation pattern of the simulated cavitation results is consistent with the variation pattern of the actual cavitation results, it can be considered that the simulation process provides relatively accurate guidance for selecting the target cutter head design. If the variation pattern is inconsistent, it is generally considered that the simulation process needs to be optimized and adjusted. The simulation parameters can be adjusted and the simulation repeated until the variation pattern of the simulated cavitation results is consistent with the variation pattern of the actual cavitation results. After confirming that the variation pattern is consistent, the minimum value can be selected from the simulated cavitation results or the actual cavitation results, and the ultrasonic tool rod model corresponding to the minimum value is determined as the target cutter head design. For example, the cavitation cloud results of the final preferred target cutter head design show that the degree of cavitation on both the inner and outer sides of the cutter head is the lowest, and the cavitation value, that is, the cavitation bubble ratio (volume integral value) is 2.8E-05, which is about 39.4% lower than the current cutter head.

[0075] The principle behind the water mist produced by ultrasonic scalpels is that ultrasound waves form surface tension waves at the gas-liquid interface. Ultrasonic cavitation breaks these surface tension waves, breaking the liquid into tiny droplets and forming water mist. Therefore, by using simulation to analyze the cavitation process, we can further analyze the mist generation process of ultrasonic scalpels. This approach can be used to predict and evaluate the mist generation behavior of newly designed or different types of scalpels at the front end of the design process.

[0076] The above-mentioned method for designing an ultrasonic scalpel head obtains the simulated cavitation process of different ultrasonic scalpel rod models, and can compare the strength of cavitation produced by different ultrasonic scalpel rod models, and then derive the difference between the heads; the cavitation process is used to simulate and evaluate the strength of the cavitation phenomenon produced by the ultrasonic scalpel head, and the optimization and improvement of the design of different ultrasonic scalpel rod models is achieved by simulation; in addition, by comparing the changing law of the simulated cavitation results with the changing law of the actual cavitation results, the effectiveness of the simulation process can be verified, and then the target scalpel head design can be determined, thereby further improving the design efficiency of the ultrasonic scalpel head.

[0077] This method can predict the amount of mist generated by ultrasonic blades, evaluate multiple ultrasonic blade bar models, and identify the optimal model. This solution establishes a new method for predicting and evaluating ultrasonic blade mist generation, providing guidance and reference for blade design and comparison.

[0078] The embodiment of the present invention provides a device for simulating ultrasonic knife mist generation, such as Figure 8 As shown, the device includes: a structural module 90, which is used to simulate the simple harmonic vibration process of the ultrasonic knife rod; a fluid module 91, which is used to simulate the fluid movement process in the cavitation area of ​​the blade head of the ultrasonic knife rod; and a coupling module 92, which is used to perform fluid-solid coupling operation on the structural module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the blade head to simulate the generation of mist by the ultrasonic knife.

[0079] The above-mentioned device for simulating the generation of mist by an ultrasonic scalpel can simulate the generation of mist by an ultrasonic scalpel by simulating the simple harmonic oscillation process of the ultrasonic scalpel rod and the fluid movement process in the cavitation area of ​​the ultrasonic scalpel head, and performing fluid-solid coupling analysis. This can predict and evaluate the mist generated by the ultrasonic scalpel at the front end of the design, reduce design trial and error, and improve the design efficiency of the ultrasonic scalpel head.

[0080] Furthermore, the structural module 90 is also used to process the ultrasonic tool rod model, wherein the processing of the ultrasonic tool rod model includes allocating model materials and dividing the grid according to the tool rod shape; the fluid module 71 is also used to process the fluid model, wherein the processing of the fluid model includes dividing the grid and refining the grid near the fluid domain of the tool head.

[0081] Furthermore, the structural module 90 is also used to apply and constrain the degrees of freedom in other directions along the longitudinal direction of the ultrasonic knife rod model.

[0082] Furthermore, the fluid module 91 is also used to analyze transients, select materials that generate cavitation, set turbulence models, and initialize the flow field.

[0083] Furthermore, the materials generated by cavitation include liquid water and gaseous water; wherein, liquid water is the main phase and gaseous water is the secondary phase.

[0084] The device for generating mist by simulating an ultrasonic knife provided in an embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned embodiment of the method for generating mist by simulating an ultrasonic knife. For the sake of brief description, for matters not mentioned in the embodiment of the device for generating mist by simulating an ultrasonic knife, reference may be made to the corresponding contents in the aforementioned embodiment of the method for generating mist by simulating an ultrasonic knife.

[0085] The embodiment of the present invention provides a device for evaluating the cavitation degree of simulated mist, such as Figure 9 As shown, the device includes: a structural module 90, which is used to simulate the simple harmonic oscillation process of the ultrasonic knife rod; a fluid module 91, which is used to simulate the fluid movement process in the cavitation area of ​​the blade head of the ultrasonic knife rod; a coupling module 92, which is used to perform fluid-solid coupling operation on the structural module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the blade head to simulate the ultrasonic knife to generate mist; an evaluation module 93, which is used to obtain the cavitation results of the simulated cavitation process and evaluate the cavitation degree in the mist generated by the simulated ultrasonic knife; wherein the cavitation results include: a cavitation distribution cloud map of the blade head and / or a cavitation value.

[0086] The above-mentioned device for evaluating the cavitation degree of simulated mist, based on the positive correlation between the cavitation process and atomization, uses the cavitation results of the cavitation process to evaluate the cavitation degree of mist generated by the ultrasonic scalpel, and then can predict and judge the mist generated by the ultrasonic scalpel.

[0087] Furthermore, if the cavitation result is a cavitation distribution cloud diagram of the blade head, the cavitation degree of the mist generated by the simulated ultrasonic knife is evaluated based on the regional distribution result in the cavitation distribution cloud diagram.

[0088] Furthermore, if the cavitation result is a cavitation value, the cavitation value is the sum of at least two of the following values: a first cavitation value in a preset cavitation area on the first side of the blade, a second cavitation value in a preset cavitation area on the second side of the blade, and a third cavitation value in a preset cavitation area at the tip of the blade; the cavitation degree of the mist generated by the simulated ultrasonic knife is evaluated based on the size of the cavitation value.

[0089] Furthermore, the cavitation value is the volume integral value corresponding to the cavitation bubbles during the cavitation process; wherein, as the volume integral value increases, the degree of cavitation increases.

[0090] The device for evaluating the degree of cavitation of simulated fog provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment for evaluating the degree of cavitation of simulated fog. For the sake of brief description, for matters not mentioned in the embodiment of the device for evaluating the degree of cavitation of simulated fog, reference may be made to the corresponding contents in the aforementioned method embodiment for evaluating the degree of cavitation of simulated fog.

[0091] The embodiment of the present invention provides a device for designing an ultrasonic scalpel head, such as Figure 10 As shown, the device includes: a design module 89 for designing an ultrasonic knife rod model to be tested with an ultrasonic knife head having different bending radians and / or cutting surfaces; a structure module 90 for simulating the simple harmonic vibration process of the ultrasonic knife rod model to be tested; a fluid module 91 for simulating the fluid motion process of the cavitation area of ​​the blade head of the ultrasonic knife rod model to be tested; a coupling module 92 for performing fluid-solid coupling operation on the structure module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the blade head to simulate the generation of mist by the ultrasonic knife; an evaluation module 93 for obtaining the air flow of the simulated cavitation process. ization results and evaluate the cavitation degree in the mist generated by the simulated ultrasonic knife; the cavitation results include: the cavitation distribution cloud map and / or cavitation value of the knife head; an acquisition module 94 is used to obtain the actual cavitation result of each of the multiple ultrasonic knife rod models to be tested; a comparison module 95 is used to compare the change pattern of the simulated cavitation results of the multiple ultrasonic knife rod models to be tested with the change pattern of the actual cavitation results; a confirmation module 96, if the change patterns of the two are consistent, then the ultrasonic knife rod model corresponding to the minimum value of the simulated cavitation result or the actual cavitation result is the target knife head design.

[0092] The above-mentioned device for designing ultrasonic scalpel heads obtains the simulated cavitation process of different ultrasonic scalpel rod models, and can compare the strength of cavitation generated by different ultrasonic scalpel rod models, and then derive the difference between the heads; the cavitation process is used to simulate and evaluate the strength of the cavitation phenomenon generated by the ultrasonic scalpel head, and the optimization and improvement of the design of different ultrasonic scalpel rod models is achieved by simulation; in addition, by comparing the changing law of the simulated cavitation results with the changing law of the actual cavitation results, the effectiveness of the simulation process can be verified, and then the target scalpel head design can be determined, thereby further improving the design efficiency of the ultrasonic scalpel head.

[0093] Furthermore, the simulated cavitation results include: a cavitation distribution cloud diagram of the cutter head and / or cavitation values; the actual cavitation results include: values ​​obtained by photographic observation and / or mist weighing.

[0094] Furthermore, the device also includes a bending curvature design module, and the design of multiple different bending curvatures is determined by the bending curvature design module. The bending curvature design module is used to: obtain a preset bending curvature range; select multiple different bending curvatures from the bending curvature range according to preset angle intervals; and / or, the design method of the cutting surface includes setting the cutting surface at different positions of the cutting head.

[0095] The device for designing an ultrasonic scalpel head provided in an embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment for designing an ultrasonic scalpel head. For the sake of brief description, for matters not mentioned in the embodiment of the device for designing an ultrasonic scalpel head, reference may be made to the corresponding contents in the aforementioned method embodiment for designing an ultrasonic scalpel head.

[0096] The embodiment of the present invention further provides an electronic device, see Figure 11 As shown, the electronic device includes a processor 130 and a memory 131, wherein the memory 131 stores machine executable instructions that can be executed by the processor 130, and the processor 130 executes the machine executable instructions to implement the above-mentioned method of simulating ultrasonic knife to generate mist, the method of evaluating the cavitation degree of simulated mist generation, or the method of designing an ultrasonic knife head.

[0097] Furthermore, Figure 11 The electronic device shown further includes a bus 132 and a communication interface 133 , and the processor 130 , the communication interface 133 and the memory 131 are connected via the bus 132 .

[0098] Among them, the memory 131 may include a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 133 (which can be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. can be used. The bus 132 can be an ISA bus, a PCI bus or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 11 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0099] The processor 130 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits or software instructions in the processor 130. The processor 130 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in memory 131, and processor 130 reads information in memory 131 and, in conjunction with its hardware, completes the steps of the method of the aforementioned embodiment.

[0100] An embodiment of the present invention also provides a machine-readable storage medium, which stores machine-executable instructions. When the machine-executable instructions are called and executed by the processor, the machine-executable instructions prompt the processor to implement the above-mentioned method of simulating the generation of mist by an ultrasonic knife, the method of evaluating the cavitation degree of the simulated mist, or the method of designing an ultrasonic knife head. The specific implementation can be found in the method embodiment and will not be repeated here.

[0101] The computer program product of the method, device and electronic device for simulating the generation of mist by an ultrasonic knife provided in the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the previous method embodiments. The specific implementation can be referred to the method embodiments and will not be repeated here.

[0102] 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 computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. 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.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for generating mist by simulating an ultrasonic knife, characterized in that: The method comprises: Simulating the simple harmonic vibration process of the ultrasonic knife rod, including calculating the simple harmonic vibration load and applying the simple harmonic vibration load to the ultrasonic knife rod model and obtaining the deformation of the ultrasonic knife rod model; Simulating the fluid motion process in the cavitation area of ​​the ultrasonic blade head, including calculating the fluid dynamics of the fluid model and obtaining the flow field; Performing a fluid-solid coupling operation to obtain a simulated cavitation process in the cavitation area of ​​the blade tip, thereby simulating the generation of mist by the ultrasonic blade; wherein, during the fluid-solid coupling simulation, the ultrasonic blade rod model and the fluid model are connected via a coupling module. During the fluid-solid coupling analysis process, the ultrasonic blade rod model and the fluid model influence and interact with each other, thereby obtaining a simulated cavitation process in the cavitation area of ​​the blade tip; The applying the simple harmonic vibration load to the ultrasonic knife rod model further includes applying the load along the longitudinal direction of the ultrasonic knife rod model and constraining the degrees of freedom in other directions; The fluid dynamics of the computational fluid model includes: analyzing transients, selecting materials that generate cavitation, setting turbulence models, and initializing flow fields; The material generated by cavitation includes liquid water and gaseous water; wherein the liquid water is the main phase and the gaseous water is the secondary phase.

2. The method according to claim 1, characterized in that The process of simulating the simple harmonic vibration of the ultrasonic knife rod also includes processing the ultrasonic knife rod model, wherein the processing of the ultrasonic knife rod model includes allocating model material and dividing the grid according to the shape of the knife rod; the process of simulating the fluid movement in the cavitation area of ​​the blade head of the ultrasonic knife rod also includes processing the fluid model, wherein the processing of the fluid model includes dividing the grid and refining the grid near the fluid domain of the blade head.

3. A method for evaluating the degree of cavitation in simulated mist, characterized in that: The method comprises: Based on the cavitation results obtained by the cavitation process according to any one of claims 1-2, the cavitation degree of the mist generated by the simulated ultrasonic knife is evaluated, wherein the cavitation results include: a cavitation distribution cloud map and / or a cavitation value of the knife head.

4. The method according to claim 3, characterized in that If the cavitation result is a cavitation distribution cloud diagram of the blade head, the evaluation of the cavitation degree of mist generated by the simulated ultrasonic scalpel is made according to the regional distribution result in the cavitation distribution cloud diagram.

5. The method according to claim 3, characterized in that If the cavitation result is the cavitation value, the cavitation value is the sum of at least two values ​​of the following: a first cavitation value in the preset cavitation area of ​​the first side surface of the cutter head, a second cavitation value in the preset cavitation area of ​​the second side surface of the cutter head, and a third cavitation value in the preset cavitation area of ​​the tip of the cutter head; The evaluation of the cavitation degree of mist generated by the simulated ultrasonic knife is made according to the size of the cavitation value.

6. The method according to claim 5, characterized in that The cavitation value is a volume integral value corresponding to cavitation bubbles during the cavitation process; wherein, as the volume integral value increases, the cavitation degree increases.

7. A method for designing an ultrasonic scalpel head, characterized in that: The method comprises: Establishing multiple ultrasonic knife bar models to be tested; wherein the ultrasonic knife head corresponding to each ultrasonic knife bar model to be tested is designed with a different bending curvature and / or cutting surface; According to the method according to any one of claims 1-2, obtaining a simulation cavitation result corresponding to the cavitation process of the cavitation area of ​​the blade head of each ultrasonic tool bar model to be tested; Obtaining actual cavitation results of each ultrasonic knife bar model to be tested; comparing the variation pattern of the simulated cavitation results with the variation pattern of the actual cavitation results; If the changing rules of the two are consistent, the ultrasonic tool rod model corresponding to the minimum value of the simulated cavitation result or the actual cavitation result is the target tool head design.

8. The method according to claim 7, characterized in that The simulation cavitation results include: a cavitation distribution cloud diagram and / or a cavitation value of the cutter head; The actual cavitation results include: values ​​obtained by photographic observation method and / or mist weighing method.

9. The method according to claim 8, characterized in that The designs of different curvatures include: Get the preset bending arc range; Selecting a plurality of different bending radians from the bending radian range at preset angle intervals; and / or, The cutting surface is designed in a manner that includes arranging the cutting surface at different positions of the cutter head.

10. A device for generating mist by simulating an ultrasonic knife, characterized in that: The device comprises: A structural module is used to simulate the simple harmonic vibration process of the ultrasonic knife rod, including calculating the simple harmonic vibration load and applying the simple harmonic vibration load to the ultrasonic knife rod model and obtaining the deformation of the ultrasonic knife rod model; A fluid module, used to simulate the fluid motion process in the cavitation area of ​​the ultrasonic blade head, including calculating the fluid dynamics of the fluid model and obtaining the flow field; a coupling module for performing fluid-solid coupling calculations on the structural module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the cutter head, so as to simulate the generation of mist by the ultrasonic cutter; wherein, during the fluid-solid coupling simulation, the ultrasonic cutter bar model and the fluid model are linked via the coupling module, and during the fluid-solid coupling analysis process, the ultrasonic cutter bar model and the fluid model influence and interact with each other to obtain a simulated cavitation process in the cavitation area of ​​the cutter head; The structural module is further used to: apply and constrain the degrees of freedom in other directions along the longitudinal direction of the ultrasonic knife rod model; The fluid module is also used to analyze transients, select materials that generate cavitation, set turbulence models, and initialize flow fields; The material generated by cavitation includes liquid water and gaseous water; wherein the liquid water is the main phase and the gaseous water is the secondary phase.

11. A device for evaluating the cavitation degree of simulated mist, characterized in that: The device comprises: Structural module, used to simulate the simple harmonic vibration process of ultrasonic tool rod; A fluid module, used to simulate the fluid motion process in the cavitation area of ​​the ultrasonic blade head; A coupling module, configured to perform fluid-solid coupling calculation on the structure module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the blade head, so as to simulate the generation of mist by the ultrasonic knife; An evaluation module is used to obtain the cavitation results of the simulated cavitation process and evaluate the cavitation degree in the mist generated by the simulated ultrasonic knife; wherein the cavitation results include: a cavitation distribution cloud map and / or a cavitation value of the knife head.

12. A device for designing an ultrasonic scalpel head, characterized in that: The device comprises: A design module, used for designing a model of an ultrasonic knife shaft to be tested having an ultrasonic knife head with different curvatures and / or cutting surfaces; A structural module, used for simulating the simple harmonic vibration process of the ultrasonic knife bar model to be tested; A fluid module, used to simulate the fluid motion process in the cavitation area of ​​the blade of the ultrasonic knife bar model to be tested; A coupling module, configured to perform fluid-solid coupling calculation on the structure module and the fluid module to obtain a simulated cavitation process in the cavitation area of ​​the blade head, so as to simulate the generation of mist by the ultrasonic knife; An evaluation module is configured to obtain the cavitation results of the simulated cavitation process and evaluate the degree of cavitation in the mist generated by the simulated ultrasonic scalpel; wherein the cavitation results include: a cavitation distribution cloud diagram and / or a cavitation value of the scalpel head; An acquisition module, configured to acquire an actual cavitation result of each of the plurality of ultrasonic knife bar models to be tested; a comparison module, configured to compare the variation pattern of the simulated cavitation results of the plurality of ultrasonic knife bar models to be tested with the variation pattern of the actual cavitation results; Confirm the module. If the change rules of the two are consistent, the ultrasonic tool rod model corresponding to the minimum value of the simulated cavitation result or the actual cavitation result is the target tool head design.

13. An electronic device, characterized in that: It includes a processor and a memory, the memory storing machine-executable instructions that can be executed by the processor, and the processor executing the machine-executable instructions to implement the method for generating mist by simulating an ultrasonic knife as described in any one of claims 1-2, or the method for evaluating the cavitation degree of simulated mist as described in any one of claims 3-6, or the method for designing an ultrasonic knife head as described in any one of claims 7-9.

14. A machine-readable storage medium, characterized in that The machine-readable storage medium stores machine-executable instructions. When the machine-executable instructions are called and executed by the processor, the machine-executable instructions prompt the processor to implement the method for generating mist by simulating an ultrasonic knife as described in any one of claims 1-2, or the method for evaluating the cavitation degree of simulated mist as described in any one of claims 3-6, or the method for designing an ultrasonic knife head as described in any one of claims 7-9.

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