Ultrasonic suspension simulation method and device, electronic equipment and storage medium

Abstract

The invention belongs to the technical field of ultrasonic suspension, and discloses an ultrasonic suspension simulation method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining an ultrasonic suspension device model which is provided with a suspended particle model in a suspension space, setting ultrasonic parameters and particle structure parameters, and according to the ultrasonic suspension characteristics of an ultrasonic suspension phenomenon, carrying out the ultrasonic suspension simulation; setting a pressure acoustics physical field and adding an ultrasonic suspension device boundary condition and a suspended particle boundary condition based on the ultrasonic parameters, the particle structure parameters, the pressure acoustics physical field, the ultrasonic suspension device boundary condition and the suspended particle boundary condition; performing ultrasonic suspension simulation on the ultrasonic suspension device model with the suspended particle model arranged in the suspension space to obtain an ultrasonic suspension simulation result; the ultrasonic suspension process is simulated through the pressure acoustic physical field, the boundary conditions of the ultrasonic suspension device and the boundary conditions of the suspended particles in combination with the ultrasonic parameters and the particle structure parameters, and the analysis efficiency of the ultrasonic suspension process is improved.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic suspension, and in particular to an ultrasonic suspension simulation method, device, electronic device and storage medium. Background Art

[0002] At present, ultrasonic levitation devices mainly include non-resonant levitators designed based on the principle of standing waves. Non-resonant levitators use transmitters that do not require calibration, are robust to changes in ambient temperature and humidity, are easy to operate, and can operate for a long time, which improves the adaptability of the levitator.

[0003] However, the suspension space of the non-resonant levitator is limited. Each time it is used, the suspension space and corresponding parameters need to be readjusted according to the shape, weight and operational requirements of the suspended object to obtain a suitable standing wave sound field and suspension capacity. The adjustment of the suspension space mainly relies on manual adjustment, which takes a long time and has large manual adjustment errors, making it difficult to obtain an accurate standing wave sound field.

[0004] Therefore, based on the finite element simulation model, the present application proposes an ultrasonic suspension simulation method, device, electronic device and storage medium. Summary of the invention

[0005] The purpose of the present application is to provide an ultrasonic levitation simulation method, device, electronic device and storage medium. Through the pressure acoustic physical field, the boundary conditions of the ultrasonic levitation device and the boundary conditions of the suspended particles, combined with the ultrasonic parameters and the particle structure parameters, an ultrasonic levitation simulation is performed on an ultrasonic levitation device model provided with a suspended particle model in the suspension space to obtain an ultrasonic levitation simulation result. The technical problem that each time the ultrasonic levitation device is used, it is necessary to rely on manual adjustment, which is time-consuming and labor-intensive and difficult to obtain an accurate standing wave sound field. The ultrasonic levitation process of the ultrasonic levitation device can be simulated quickly and efficiently, and the analysis efficiency of the ultrasonic levitation process is improved.

[0006] In a first aspect, the present application provides an ultrasonic levitation simulation method, comprising the steps of: Acquire an ultrasonic suspension device model having a suspended particle model disposed in a suspension space; Setting the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model; According to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, the pressure acoustic physical field is set and the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions are added; Based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension simulation is performed on an ultrasonic suspension device model provided with a suspended particle model in the suspension space to obtain an ultrasonic suspension simulation result.

[0007] The ultrasonic suspension simulation method provided in the present application can realize the analysis of the ultrasonic suspension process of the ultrasonic suspension device. Through the pressure acoustic physical field, the boundary conditions of the ultrasonic suspension device and the boundary conditions of the suspended particles, combined with the ultrasonic parameters and the particle structure parameters, the ultrasonic suspension simulation is performed on the ultrasonic suspension device model provided with the suspended particle model in the suspension space to obtain the ultrasonic suspension simulation result. The technical problem that each time the ultrasonic suspension device is used, it is necessary to rely on manual adjustment, which is time-consuming and labor-intensive and difficult to obtain an accurate standing wave sound field. The ultrasonic suspension process of the ultrasonic suspension device can be simulated quickly and efficiently, and the analysis efficiency of the ultrasonic suspension process is improved.

[0008] Optionally, obtaining a model of an ultrasonic suspension device having a suspended particle model disposed in a suspension space includes: Acquire device structure information of the ultrasonic suspension device; According to the device structure information, constructing an ultrasonic suspension device model provided with a suspension space; A suspended particle model is arranged in the suspension space of the ultrasonic suspension device model.

[0009] The ultrasonic suspension simulation method provided in the present application can analyze the ultrasonic suspension process of an ultrasonic suspension device. By setting a suspended particle model in the suspension space of the ultrasonic suspension device model, the ultrasonic suspension process of the ultrasonic suspension device is simulated, which is beneficial to improving the analysis efficiency of the ultrasonic suspension process of the ultrasonic suspension device.

[0010] Optionally, the boundary conditions of the ultrasonic levitation device include an inner normal displacement condition of a transducer boundary, a hard sound field boundary condition of a reflection boundary, and a plane wave radiation boundary condition of an external boundary.

[0011] Optionally, the suspended particle boundary conditions include particle force condition boundary conditions and particle motion constraint boundary conditions.

[0012] Optionally, according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, a pressure acoustic physical field is set and an ultrasonic suspension device boundary condition and a suspended particle boundary condition are added, including: Based on the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, a pressure acoustic physical field is set; Adding an inner normal displacement condition of the transducer boundary, a hard acoustic field boundary condition of the reflection boundary, and a plane wave radiation boundary condition of the external boundary to the pressure acoustic physical field; The particle force condition boundary condition and the particle motion constraint boundary condition are added to the pressure acoustic physical field.

[0013] The ultrasonic levitation simulation method provided in the present application can realize the analysis of the ultrasonic levitation process of the ultrasonic levitation device. By setting a pressure acoustic physical field and adding the internal normal displacement condition of the transducer boundary, the hard sound field boundary condition of the reflection boundary, the plane wave radiation boundary condition of the external boundary, the particle force boundary condition and the particle motion constraint boundary condition in the pressure acoustic physical field, the authenticity of the simulation and the accuracy of the analysis results are improved, which is conducive to improving the analysis efficiency of the ultrasonic levitation process of the ultrasonic levitation device.

[0014] Optionally, based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension simulation is performed on an ultrasonic suspension device model provided with a suspended particle model in the suspension space, and before obtaining the ultrasonic suspension simulation result, the method further includes: The ultrasonic suspension device model having the suspension particle model arranged in the suspension space is meshed.

[0015] Optionally, based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension device model provided with a suspended particle model in the suspension space is subjected to ultrasonic suspension simulation to obtain an ultrasonic suspension simulation result, including: Setting air as a sound wave propagation medium in the suspension space; Based on the sound wave propagation medium, the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension simulation is performed on an ultrasonic suspension device model in which a suspended particle model is arranged in the suspension space to obtain an ultrasonic suspension simulation result.

[0016] In a second aspect, the present application provides an ultrasonic suspension simulation device for analyzing the ultrasonic suspension process of an ultrasonic suspension device, comprising: An acquisition module, used to acquire a model of an ultrasonic suspension device having a suspended particle model arranged in a suspension space; A first setting module, used to set the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model; A second setting module is used to set the pressure acoustic physical field and add the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon; The simulation module is used to perform ultrasonic suspension simulation on an ultrasonic suspension device model provided with a suspended particle model in the suspension space based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions to obtain an ultrasonic suspension simulation result.

[0017] The ultrasonic suspension simulation device performs ultrasonic suspension simulation on an ultrasonic suspension device model with a suspended particle model in a suspension space through pressure acoustic physical fields, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, combined with ultrasonic parameters and particle structure parameters, to obtain an ultrasonic suspension simulation result, thereby solving the technical problem that each time the ultrasonic suspension device is used, the manual adjustment method needs to be relied upon, which is time-consuming and labor-intensive and it is difficult to obtain an accurate standing wave sound field. The ultrasonic suspension process of the ultrasonic suspension device can be simulated quickly and efficiently, thereby improving the analysis efficiency of the ultrasonic suspension process.

[0018] In a third aspect, the present application provides an electronic device, including a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the ultrasonic levitation simulation method described above.

[0019] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps in the ultrasonic levitation simulation method described above are executed.

[0020] Beneficial effects: The ultrasonic levitation simulation method, device, electronic device and storage medium provided in the present application, through the pressure acoustic physical field, the boundary conditions of the ultrasonic levitation device and the boundary conditions of the suspended particles, combined with the ultrasonic parameters and the particle structure parameters, perform ultrasonic levitation simulation on the ultrasonic levitation device model provided with a suspended particle model in the suspension space, and obtain ultrasonic levitation simulation results, which solves the technical problem that each time the ultrasonic levitation device is used, it needs to rely on manual adjustment, which is time-consuming and labor-intensive and difficult to obtain an accurate standing wave sound field. It can quickly and efficiently simulate the ultrasonic levitation process of the ultrasonic levitation device, and improve the analysis efficiency of the ultrasonic levitation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flow chart of the ultrasonic levitation simulation method provided in an embodiment of the present application.

[0022] Figure 2 This is a schematic diagram of the structure of the ultrasonic levitation simulation device provided in an embodiment of the present application.

[0023] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0024] Explanation of reference numerals: 1. Acquisition module; 2. First setting module; 3. Second setting module; 4. Simulation module; 301. Processor; 302. Memory; 303. Communication bus. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] Please refer to Figure 1 , Figure 1 It is an ultrasonic suspension simulation method in some embodiments of the present application, which is used to analyze the ultrasonic suspension process of the ultrasonic suspension device, and includes: Step S101, obtaining an ultrasonic suspension device model having a suspended particle model in a suspension space; Step S102, setting the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model; Step S103, according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, setting the pressure acoustic physical field and adding the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions; Step S104, based on ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, an ultrasonic suspension device model with a suspended particle model arranged in the suspension space is subjected to ultrasonic suspension simulation to obtain an ultrasonic suspension simulation result.

[0028] The ultrasonic suspension simulation method performs ultrasonic suspension simulation on an ultrasonic suspension device model provided with a suspended particle model in a suspension space through pressure acoustic physical fields, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, in combination with ultrasonic parameters and particle structure parameters, to obtain an ultrasonic suspension simulation result, thereby solving the technical problem that each time an ultrasonic suspension device is used, the manual adjustment method is required, which is time-consuming and labor-intensive and it is difficult to obtain an accurate standing wave sound field, and the ultrasonic suspension process of the ultrasonic suspension device can be simulated quickly and efficiently, thereby improving the analysis efficiency of the ultrasonic suspension process.

[0029] Specifically, in step S101, obtaining an ultrasonic suspension device model having a suspended particle model in a suspension space includes: Acquire device structure information of the ultrasonic suspension device; According to the device structure information, a model of an ultrasonic suspension device provided with a suspension space is constructed; A suspended particle model is set in the suspension space of the ultrasonic suspension device model.

[0030] In step S101, a model of an ultrasonic suspension device provided with a suspension space is constructed by simulation software or modeling software according to the device structure information of the ultrasonic suspension device, wherein the device structure information includes the structure information of each component of the ultrasonic suspension device, and the ultrasonic suspension device has different structural types. According to actual needs, the device structure information of the corresponding structure can be input to generate an ultrasonic transducer of the corresponding structure.

[0031] For example, the structure of an ultrasonic suspension device includes an ultrasonic transducer array, a bracket and an adjustment rod, wherein the ultrasonic transducer array is fixedly connected to the bracket, and the bracket is movably connected to the adjustment rod. An ultrasonic suspension device is provided with at least two ultrasonic transducer arrays, and a plurality of ultrasonic transducers are provided in an ultrasonic transducer array. The emitting surfaces of at least two ultrasonic transducer arrays are arranged relative to each other, so that the acoustophoretic force (acoustic radiation force, the force of object movement caused by sound, here refers to the acoustophoretic force of ultrasonic waves) between the emitting surfaces forms a standing wave sound field, so that the space between the emitting surfaces forms a suspension space. The distance between the ultrasonic transducer arrays can be adjusted by the adjustment rod to adjust the standing wave sound field, the suspension space and the suspension capacity.

[0032] A suspended particle model is set in the suspension space of the ultrasonic suspension device model, wherein the suspended particle model is a solid particle, and the suspended particle model is set in the suspension space to reflect the change and distribution of the standing wave sound field.

[0033] Specifically, in step S102, in the simulation software or modeling software, the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model are set according to actual needs. The ultrasonic parameters include parameters such as ultrasonic frequency, ultrasonic amplitude, and resonant cavity length, and the particle structure parameters include parameters such as particle size, shape, and weight.

[0034] Specifically, the boundary conditions of the ultrasonic levitation device include the internal normal displacement condition of the transducer boundary, the hard sound field boundary condition of the reflection boundary, and the plane wave radiation boundary condition of the external boundary. Among them, the internal normal displacement condition refers to the boundary condition that the normal displacement of the emitting surface is zero in the levitation space; the hard sound field boundary condition refers to the normal component of the acceleration (or velocity) at the boundary of the reflection surface is 0; the plane wave radiation boundary condition refers to the description of the reflection and refraction phenomenon of sound waves at the interface composed of two different media.

[0035] The suspended particle boundary conditions include the particle force boundary conditions and the particle motion constraint boundary conditions. Among them, the particle force boundary conditions refer to applying acoustophoretic force, gravity and drag force to the suspended particle model to simulate the force conditions of the suspended particles; the particle motion constraint boundary conditions refer to the fact that the suspended particle model will disappear or freeze when it reaches the air domain boundary (the air domain boundary refers to the space outside the suspension space) after movement.

[0036] Specifically, in step S103, according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, the pressure acoustic physical field is set and the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions are added, including: Based on the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, a pressure acoustic physical field is set; Add internal normal displacement conditions to transducer boundaries, hard acoustic field conditions to reflecting boundaries, and plane wave radiation boundary conditions to external boundaries in the pressure acoustics physics field; Add the Particle Force Condition and Particle Motion Constraint Condition boundary conditions to the Pressure Acoustics physics.

[0037] It should be noted that the ultrasonic suspension characteristic refers to the characteristic that particles are suspended when they are affected by the standing wave sound field corresponding to the ultrasonic wave.

[0038] In step S103, according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, a default pressure acoustic physical field is set in the simulation software or modeling software to distribute a standing wave sound field in the suspension space. The suspended particle model gradually reaches a stable state under the action of the standing wave sound field. By analyzing the suspended particle model, the distribution changes and trajectory changes of the suspended particle model can be obtained.

[0039] In the pressure acoustics physics, use the internal normal displacement condition on the transducer boundary, the hard acoustic field boundary condition on the reflecting boundary, and the plane wave radiation boundary condition on the exterior boundary, as well as add the particle force condition and the particle motion constraint boundary conditions.

[0040] In the ultrasonic suspension device, a standing wave acoustic field is formed by controlling the frequency and phase of the ultrasonic wave. The wave nodes in the standing wave acoustic field serve as the balance points of the acoustic radiation force. Under the synergistic effect of the acoustic radiation force and the restoring force, the suspended particles overcome gravity and stably suspend at the wave node position. The standing wave acoustic field formed is specifically: ; in, is the acoustic radiation force on the suspended particles; is the sound wave amplitude, that is, the maximum pressure difference of the ultrasonic wave; k is the wave number; x is the position of the suspended particle in the standing wave sound field (that is, the horizontal position of the suspended particle in the suspension space, specifically the horizontal position relative to each ultrasonic transducer array); kx is the phase of the ultrasonic wave; exponential function is the time influencing factor, j is an imaginary number, w is the angular frequency of the ultrasound, indicating the number of rotations of the ultrasound per unit time, and t is the time.

[0041] In the first-order approximation, according to the Euler equation (i.e., the momentum conservation equation of the fluid), the vibration velocity of the air also produces sound waves, but the sound pressure difference with the ultrasonic wave is phase.

[0042] Among them, the movement rate of suspended particles is specifically: ; Where v is the movement velocity of suspended particles; is the density of the propagation medium; is the ratio between the momentum change rate of the ultrasonic wave and the sound pressure; c is the speed of sound, that is, the propagation speed of the ultrasonic wave in the propagation medium; is the vibration velocity of the suspended particles along the horizontal direction.

[0043] Relative to suspended particles, the radiation pressure at a certain point in the standing wave sound field is proportional to the force density at that point, and the time-averaged radiation pressure is equivalent to the potential field acting on the suspended particles, and its scattering of sound waves can be ignored. Therefore, the sound pressure of the standing wave sound field without suspended particles can be used to calculate the acoustic radiation force. Therefore, the acoustic radiation force is specifically: ; in, represents the real part, Indicates taking The real part of Indicates taking The real part of is the complex conjugate of the velocity v of the suspended particles, is the acoustic radiation force The complex conjugate of ; P is the sound pressure.

[0044] In specific applications, when calculating the acoustic radiation force The shape of the suspended particles and the scattering of the sound waves by the shape will be considered, and the scattering will affect the sound radiation force. The final result is still proportional to , therefore, the suspended particles will still stay near the nodes.

[0045] In summary, when performing ultrasonic suspension simulation on an ultrasonic suspension device, the acoustic radiation force can be qualitatively analyzed on the suspended particles through the calculation formula of the acoustic radiation force, so that the ultrasonic suspension simulation process is more in line with the actual situation.

[0046] Specifically, based on ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, an ultrasonic suspension device model having a suspended particle model arranged in the suspension space is subjected to ultrasonic suspension simulation, and before obtaining the ultrasonic suspension simulation result, the method further includes: The ultrasonic suspension device model with the suspended particle model arranged in the suspension space is meshed.

[0047] Before performing ultrasonic suspension simulation, it is necessary to mesh the ultrasonic suspension device model with the suspended particle model in the suspension space (the meshing setting can be set according to actual needs) to improve the accuracy of the simulation.

[0048] Specifically, in step S104, based on ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, an ultrasonic suspension device model provided with a suspended particle model in the suspension space is subjected to ultrasonic suspension simulation to obtain ultrasonic suspension simulation results, including: Air is set as the sound wave propagation medium of the suspension space; Based on the sound wave propagation medium, ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, an ultrasonic suspension simulation is performed on an ultrasonic suspension device model with a suspended particle model set in the suspension space to obtain an ultrasonic suspension simulation result.

[0049] In step S104, air is set as the sound wave propagation medium of the suspension space, and according to the sound wave propagation medium, ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, the ultrasonic suspension device model provided with the suspended particle model in the suspension space is subjected to ultrasonic suspension simulation using simulation software or modeling software (the ultrasonic suspension simulation process is the automatic execution process of the simulation software or modeling software, which is not described in detail here), and an ultrasonic suspension simulation result is obtained. Among them, by analyzing the ultrasonic suspension simulation results, the optimal ultrasonic transducer phase and the optimal ultrasonic transducer setting position of the ultrasonic suspension device in different standing wave sound field distributions can be determined; by inputting different ultrasonic parameters or particle structure parameters, the corresponding ultrasonic suspension simulation results can be obtained, so as to analyze and obtain the standing wave sound field distribution corresponding to different ultrasonic parameters or different particle structure parameters. According to actual needs, the corresponding ultrasonic suspension simulation results can be obtained for analysis, and the suspension capacity of the ultrasonic suspension device can be adjusted according to the analysis results, or, according to the analysis results, an ultrasonic suspension device that meets specific needs can be produced.

[0050] As can be seen from the above, the ultrasonic suspension simulation method obtains an ultrasonic suspension device model with a suspended particle model in the suspension space, sets the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model, sets the pressure acoustic physical field and adds the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, and performs ultrasonic suspension simulation on the ultrasonic suspension device model with a suspended particle model in the suspension space based on the ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions to obtain an ultrasonic suspension simulation result; thus, through the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, combined with the ultrasonic parameters and the particle structure parameters, the ultrasonic suspension simulation is performed on the ultrasonic suspension device model with a suspended particle model in the suspension space to obtain an ultrasonic suspension simulation result, which solves the technical problem that each time the ultrasonic suspension device is used, it needs to rely on manual adjustment, which is time-consuming and labor-intensive and difficult to obtain an accurate standing wave sound field, and can quickly and efficiently simulate the ultrasonic suspension process of the ultrasonic suspension device, thereby improving the analysis efficiency of the ultrasonic suspension process.

[0051] refer to Figure 2 The present application provides an ultrasonic suspension simulation device for analyzing the ultrasonic suspension process of an ultrasonic suspension device, including: An acquisition module 1 is used to acquire a model of an ultrasonic suspension device having a suspended particle model arranged in a suspension space; A first setting module 2 is used to set the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model; A second setting module 3 is used to set the pressure acoustic physical field and add the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon; The simulation module 4 is used to perform ultrasonic suspension simulation on an ultrasonic suspension device model having a suspended particle model in the suspension space based on ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions to obtain ultrasonic suspension simulation results.

[0052] The ultrasonic suspension simulation device performs ultrasonic suspension simulation on an ultrasonic suspension device model with a suspended particle model in a suspension space through pressure acoustic physical fields, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, combined with ultrasonic parameters and particle structure parameters, to obtain an ultrasonic suspension simulation result, thereby solving the technical problem that each time the ultrasonic suspension device is used, the manual adjustment method needs to be relied upon, which is time-consuming and labor-intensive and it is difficult to obtain an accurate standing wave sound field. The ultrasonic suspension process of the ultrasonic suspension device can be simulated quickly and efficiently, thereby improving the analysis efficiency of the ultrasonic suspension process.

[0053] Specifically, the acquisition module 1 acquires an ultrasonic suspension device model having a suspended particle model in the suspension space, including: Acquire device structure information of the ultrasonic suspension device; According to the device structure information, a model of an ultrasonic suspension device provided with a suspension space is constructed; A suspended particle model is set in the suspension space of the ultrasonic suspension device model.

[0054] When the acquisition module 1 is executed, a model of an ultrasonic suspension device provided with a suspension space is constructed according to the device structure information of the ultrasonic suspension device through simulation software or modeling software, wherein the device structure information includes the structure information of each component of the ultrasonic suspension device, and the ultrasonic suspension device has different structural types. According to actual needs, the device structure information of the corresponding structure can be input to generate an ultrasonic transducer of the corresponding structure.

[0055] For example, the structure of an ultrasonic suspension device includes an ultrasonic transducer array, a bracket and an adjustment rod, wherein the ultrasonic transducer array is fixedly connected to the bracket, and the bracket is movably connected to the adjustment rod. An ultrasonic suspension device is provided with at least two ultrasonic transducer arrays, and a plurality of ultrasonic transducers are provided in an ultrasonic transducer array. The emitting surfaces of at least two ultrasonic transducer arrays are arranged relative to each other, so that the acoustophoretic force (acoustic radiation force, the force of object movement caused by sound, here refers to the acoustophoretic force of ultrasonic waves) between the emitting surfaces forms a standing wave sound field, so that the space between the emitting surfaces forms a suspension space. The distance between the ultrasonic transducer arrays can be adjusted by the adjustment rod to adjust the standing wave sound field, the suspension space and the suspension capacity.

[0056] A suspended particle model is set in the suspension space of the ultrasonic suspension device model, wherein the suspended particle model is a solid particle, and the suspended particle model is set in the suspension space to reflect the change and distribution of the standing wave sound field.

[0057] Specifically, when the first setting module 2 is executed, in the simulation software or modeling software, the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model are set according to actual needs. The ultrasonic parameters include parameters such as ultrasonic frequency, ultrasonic amplitude and resonance cavity length, and the particle structure parameters include parameters such as particle size, shape and weight.

[0058] Specifically, the boundary conditions of the ultrasonic levitation device include the internal normal displacement condition of the transducer boundary, the hard sound field boundary condition of the reflection boundary, and the plane wave radiation boundary condition of the external boundary. Among them, the internal normal displacement condition refers to the boundary condition that the normal displacement of the emitting surface is zero in the levitation space; the hard sound field boundary condition refers to the normal component of the acceleration (or velocity) at the boundary of the reflection surface is 0; the plane wave radiation boundary condition refers to the description of the reflection and refraction phenomenon of sound waves at the interface composed of two different media.

[0059] The suspended particle boundary conditions include the particle force boundary conditions and the particle motion constraint boundary conditions. Among them, the particle force boundary conditions refer to applying acoustophoretic force, gravity and drag force to the suspended particle model to simulate the force conditions of the suspended particles; the particle motion constraint boundary conditions refer to the fact that the suspended particle model will disappear or freeze when it reaches the air domain boundary (the air domain boundary refers to the space outside the suspension space) after movement.

[0060] Specifically, when the second setting module 3 sets the pressure acoustic physical field and adds the ultrasonic suspension device boundary condition and the suspended particle boundary condition according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, it executes: Based on the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, a pressure acoustic physical field is set; Add internal normal displacement conditions to transducer boundaries, hard acoustic field conditions to reflecting boundaries, and plane wave radiation boundary conditions to external boundaries in the pressure acoustics physics field; Add the Particle Force Condition and Particle Motion Constraint Condition boundary conditions to the Pressure Acoustics physics.

[0061] It should be noted that the ultrasonic suspension characteristic refers to the characteristic that particles are suspended when they are affected by the standing wave sound field corresponding to the ultrasonic wave.

[0062] When the second setting module 3 is executed, according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, a default pressure acoustic physical field is set in the simulation software or modeling software to distribute a standing wave sound field in the suspension space. The suspended particle model gradually reaches a stable state under the action of the standing wave sound field. By analyzing the suspended particle model, the distribution changes and trajectory changes of the suspended particle model can be obtained.

[0063] In the pressure acoustics physics, use the internal normal displacement condition on the transducer boundary, the hard acoustic field boundary condition on the reflecting boundary, and the plane wave radiation boundary condition on the exterior boundary, as well as add the particle force condition and the particle motion constraint boundary conditions.

[0064] In the ultrasonic suspension device, a standing wave acoustic field is formed by controlling the frequency and phase of the ultrasonic wave. The wave nodes in the standing wave acoustic field serve as the balance points of the acoustic radiation force. Under the synergistic effect of the acoustic radiation force and the restoring force, the suspended particles overcome gravity and stably suspend at the wave node position. The standing wave acoustic field formed is specifically: ; in, is the acoustic radiation force on the suspended particles; is the sound wave amplitude, that is, the maximum pressure difference of the ultrasonic wave; k is the wave number; x is the position of the suspended particle in the standing wave sound field (that is, the horizontal position of the suspended particle in the suspension space, specifically the horizontal position relative to each ultrasonic transducer array); kx is the phase of the ultrasonic wave; exponential function is the time influencing factor, j is an imaginary number, w is the angular frequency of the ultrasound, indicating the number of rotations of the ultrasound per unit time, and t is the time.

[0065] In the first-order approximation, according to the Euler equation (i.e., the momentum conservation equation of the fluid), the vibration velocity of the air also produces sound waves, but the sound pressure difference with the ultrasonic wave is phase.

[0066] Among them, the movement rate of suspended particles is specifically: ; Where v is the movement velocity of suspended particles; is the density of the propagation medium; is the ratio between the momentum change rate of the ultrasonic wave and the sound pressure; c is the speed of sound, that is, the propagation speed of the ultrasonic wave in the propagation medium; is the vibration velocity of the suspended particles along the horizontal direction.

[0067] Relative to suspended particles, the radiation pressure at a certain point in the standing wave sound field is proportional to the force density at that point, and the time-averaged radiation pressure is equivalent to the potential field acting on the suspended particles, and its scattering of sound waves can be ignored. Therefore, the sound pressure of the standing wave sound field without suspended particles can be used to calculate the acoustic radiation force. Therefore, the acoustic radiation force is specifically: ; in, represents the real part, Indicates taking The real part of Indicates taking The real part of is the complex conjugate of the velocity v of the suspended particles, is the acoustic radiation force The complex conjugate of ; P is the sound pressure.

[0068] In specific applications, when calculating the acoustic radiation force The shape of the suspended particles and the scattering of the sound waves by the shape will be considered, and the scattering will affect the sound radiation force. The final result is still proportional to , therefore, the suspended particles will still stay near the nodes.

[0069] In summary, when performing ultrasonic suspension simulation on an ultrasonic suspension device, the acoustic radiation force can be qualitatively analyzed on the suspended particles through the calculation formula of the acoustic radiation force, so that the ultrasonic suspension simulation process is more in line with the actual situation.

[0070] Specifically, the ultrasonic suspension simulation device also includes: The partitioning module is used to perform mesh partitioning on an ultrasonic suspension device model having a suspended particle model in the suspension space.

[0071] Before performing ultrasonic suspension simulation, it is necessary to mesh the ultrasonic suspension device model with the suspended particle model in the suspension space (the meshing setting can be set according to actual needs) to improve the accuracy of the simulation.

[0072] Specifically, the simulation module 4 performs ultrasonic suspension simulation on an ultrasonic suspension device model provided with a suspended particle model in the suspension space based on ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, and when obtaining the ultrasonic suspension simulation result, executes: Air is set as the sound wave propagation medium of the suspension space; Based on the sound wave propagation medium, ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, an ultrasonic suspension simulation is performed on an ultrasonic suspension device model with a suspended particle model set in the suspension space to obtain an ultrasonic suspension simulation result.

[0073] When the simulation module 4 is executed, the air is set as the sound wave propagation medium of the suspension space, and according to the sound wave propagation medium, ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, the ultrasonic suspension device model with the suspended particle model in the suspension space is subjected to ultrasonic suspension simulation using simulation software or modeling software (the ultrasonic suspension simulation process is the automatic execution process of the simulation software or modeling software, which is not described in detail here), and the ultrasonic suspension simulation result is obtained. Among them, by analyzing the ultrasonic suspension simulation results, the optimal ultrasonic transducer phase and the optimal ultrasonic transducer setting position of the ultrasonic suspension device in different standing wave sound field distributions can be determined; by inputting different ultrasonic parameters or particle structure parameters, the corresponding ultrasonic suspension simulation results can be obtained, so as to analyze and obtain the standing wave sound field distribution corresponding to different ultrasonic parameters or different particle structure parameters. According to actual needs, the corresponding ultrasonic suspension simulation results can be obtained for analysis, and the suspension capacity of the ultrasonic suspension device can be adjusted according to the analysis results, or, according to the analysis results, an ultrasonic suspension device that meets specific needs can be produced.

[0074] As can be seen from the above, the ultrasonic suspension simulation device obtains an ultrasonic suspension device model with a suspended particle model in the suspension space, sets the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model, sets the pressure acoustic physical field and adds the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, and performs ultrasonic suspension simulation on the ultrasonic suspension device model with a suspended particle model in the suspension space based on the ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions to obtain an ultrasonic suspension simulation result; thus, through the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, combined with the ultrasonic parameters and the particle structure parameters, the ultrasonic suspension simulation is performed on the ultrasonic suspension device model with a suspended particle model in the suspension space to obtain an ultrasonic suspension simulation result, which solves the technical problem that each time the ultrasonic suspension device is used, it needs to rely on manual adjustment, which is time-consuming and labor-intensive and difficult to obtain an accurate standing wave sound field, and can quickly and efficiently simulate the ultrasonic suspension process of the ultrasonic suspension device, thereby improving the analysis efficiency of the ultrasonic suspension process.

[0075] Please refer to Figure 3 , Figure 3This is a structural schematic diagram of an electronic device provided in an embodiment of the present application. The present application provides an electronic device, including: a processor 301 and a memory 302. The processor 301 and the memory 302 are interconnected and communicate with each other through a communication bus 303 and / or other forms of connection mechanisms (not shown). The memory 302 stores a computer program executable by the processor 301. When the electronic device is running, the processor 301 executes the computer program to execute the ultrasonic suspension simulation method in any optional implementation of the above embodiment to achieve the following functions: obtaining an ultrasonic suspension device model with a suspended particle model set in a suspension space, setting ultrasonic parameters of the ultrasonic suspension device model and particle structure parameters of the suspended particle model, setting a pressure acoustic physical field and adding ultrasonic suspension device boundary conditions and suspended particle boundary conditions according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, and performing ultrasonic suspension simulation on the ultrasonic suspension device model with a suspended particle model set in the suspension space based on the ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions to obtain an ultrasonic suspension simulation result.

[0076] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the ultrasonic suspension simulation method in any optional implementation of the above embodiments is executed to achieve the following functions: an ultrasonic suspension device model having a suspended particle model arranged in a suspension space is obtained, ultrasonic parameters of the ultrasonic suspension device model and particle structure parameters of the suspended particle model are set, a pressure acoustic physical field is set according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, and ultrasonic suspension device boundary conditions and suspended particle boundary conditions are added; based on the ultrasonic parameters, particle structure parameters, pressure acoustic physical field, ultrasonic suspension device boundary conditions and suspended particle boundary conditions, an ultrasonic suspension simulation is performed on the ultrasonic suspension device model having a suspended particle model arranged in the suspension space to obtain an ultrasonic suspension simulation result. Among them, the storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable red-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0077] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0078] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0079] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0080] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0081] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonic levitation simulation method for analyzing the ultrasonic levitation process of an ultrasonic levitation device, characterized in that: Includes steps: Acquire an ultrasonic suspension device model having a suspended particle model disposed in a suspension space; Setting the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model; According to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, the pressure acoustic physical field is set and the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions are added; Based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension simulation is performed on an ultrasonic suspension device model provided with a suspended particle model in the suspension space to obtain an ultrasonic suspension simulation result.

2. The ultrasonic levitation simulation method according to claim 1, characterized in that: Obtaining an ultrasonic suspension device model having a suspended particle model in a suspension space, including: Acquire device structure information of the ultrasonic suspension device; According to the device structure information, constructing an ultrasonic suspension device model provided with a suspension space; A suspended particle model is arranged in the suspension space of the ultrasonic suspension device model.

3. The ultrasonic levitation simulation method according to claim 1, characterized in that: The boundary conditions of the ultrasonic suspension device include an inner normal displacement condition of a transducer boundary, a hard sound field boundary condition of a reflection boundary, and a plane wave radiation boundary condition of an external boundary.

4. The ultrasonic levitation simulation method according to claim 3, characterized in that: The suspended particle boundary conditions include particle force boundary conditions and particle motion constraint boundary conditions.

5. The ultrasonic levitation simulation method according to claim 4, characterized in that: According to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, the pressure acoustic physical field is set and the ultrasonic suspension device boundary conditions and suspended particle boundary conditions are added, including: Based on the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, a pressure acoustic physical field is set; Adding an inner normal displacement condition of the transducer boundary, a hard acoustic field boundary condition of the reflection boundary, and a plane wave radiation boundary condition of the external boundary to the pressure acoustic physical field; The particle force condition boundary condition and the particle motion constraint boundary condition are added to the pressure acoustic physical field.

6. The ultrasonic levitation simulation method according to claim 1, characterized in that: Based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension device model provided with a suspended particle model in the suspension space is subjected to ultrasonic suspension simulation, and before obtaining the ultrasonic suspension simulation result, the method further includes: The ultrasonic suspension device model having the suspension particle model arranged in the suspension space is meshed.

7. The ultrasonic levitation simulation method according to claim 1, characterized in that: Based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension device model provided with a suspended particle model in the suspension space is subjected to ultrasonic suspension simulation to obtain an ultrasonic suspension simulation result, including: Setting air as a sound wave propagation medium in the suspension space; Based on the sound wave propagation medium, the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, an ultrasonic suspension simulation is performed on an ultrasonic suspension device model in which a suspended particle model is arranged in the suspension space to obtain an ultrasonic suspension simulation result.

8. An ultrasonic suspension simulation device for analyzing the ultrasonic suspension process of an ultrasonic suspension device, characterized in that: include: An acquisition module, used to acquire a model of an ultrasonic suspension device having a suspended particle model arranged in a suspension space; A first setting module, used to set the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model; A second setting module is used to set the pressure acoustic physical field and add the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon; The simulation module is used to perform ultrasonic suspension simulation on an ultrasonic suspension device model provided with a suspended particle model in the suspension space based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions to obtain an ultrasonic suspension simulation result.

9. An electronic device, characterized in that: It comprises a processor and a memory, wherein the memory stores a computer program executable by the processor, and when the processor executes the computer program, it runs the steps in the ultrasonic levitation simulation method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the ultrasonic levitation simulation method according to any one of claims 1 to 7 are executed.

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