Ultrasound levitation simulation method and device, electronic equipment and storage medium

Abstract

The application belongs to the technical field of ultrasonic suspension, and discloses an ultrasonic suspension simulation method and device, electronic equipment and a storage medium. The method comprises the following steps: obtaining an ultrasonic suspension device model provided with a suspended particle model in a suspension space, setting ultrasonic parameters and particle structure parameters, setting a pressure acoustic physical field according to the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon, adding ultrasonic suspension device boundary conditions and suspended particle boundary conditions, performing ultrasonic suspension simulation on the ultrasonic suspension device model provided with the 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, and obtaining an ultrasonic suspension simulation result. The ultrasonic suspension process is simulated by combining the ultrasonic parameters and the particle structure parameters with the pressure acoustic physical field, the ultrasonic suspension device boundary conditions and the suspended particle boundary conditions, so that the analysis efficiency of the ultrasonic suspension process is improved.

Description

TECHNICAL FIELD

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

[0002] At present, the ultrasonic levitation device mainly includes a non-resonant levitator designed based on the principle of standing wave. The non-resonant levitator uses a transmitter that does not need to be calibrated, has strong robustness to changes in ambient temperature and humidity, is easy to operate, and can be operated for a long time, thereby improving the adaptability of the levitator.

[0003] However, the non-resonant levitator has a limited levitation space, and the levitation space and the corresponding parameters need to be adjusted according to the shape, weight and operation requirements of the levitated object each time to obtain a suitable standing wave sound field and levitation capability. When adjusting the levitation space, manual adjustment is mainly relied on, which takes a long time and has a large manual adjustment error, and it is difficult to obtain an accurate standing wave sound field.

[0004] Therefore, based on the finite element simulation model, the present application provides an ultrasonic levitation simulation method, device, electronic equipment and storage medium. SUMMARY

[0005] The present application aims to provide an ultrasonic levitation simulation method, device, electronic equipment and storage medium. By setting a pressure acoustic physical field, ultrasonic levitation device boundary conditions and levitated particle boundary conditions, combining ultrasonic parameters and particle structure parameters, an ultrasonic levitation simulation of an ultrasonic levitation device model provided with a levitated particle model in a levitation space is performed, and an ultrasonic levitation simulation result is obtained. The technical problem of time-consuming and laborious manual adjustment and difficulty in obtaining an accurate standing wave sound field each time the ultrasonic levitation device is used is solved, and the ultrasonic levitation process of the ultrasonic levitation device can be quickly and efficiently simulated, thereby improving the analysis efficiency of the ultrasonic levitation process.

[0006] In a first aspect, the present application provides an ultrasonic levitation simulation method, comprising the steps of:

[0007] obtaining an ultrasonic levitation device model provided with a levitated particle model in a levitation space;

[0008] setting ultrasonic parameters of the ultrasonic levitation device model and particle structure parameters of the levitated particle model;

[0009] setting a pressure acoustic physical field according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, and adding ultrasonic levitation device boundary conditions and levitated particle boundary conditions;

[0010] performing ultrasonic levitation simulation on the ultrasonic levitation device model with the levitated particle model in the levitation space based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition to obtain an ultrasonic levitation simulation result.

[0011] The ultrasonic levitation simulation method provided in the application can analyze the ultrasonic levitation process of the ultrasonic levitation device. The ultrasonic levitation simulation method combines the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition, and combines the ultrasonic parameters and the particle structure parameters to perform ultrasonic levitation simulation on the ultrasonic levitation device model with the levitated particle model in the levitation space, and obtains an ultrasonic levitation simulation result. The ultrasonic levitation simulation method solves the technical problem that it is time-consuming and laborious to rely on manual adjustment to obtain an accurate standing wave field every time the ultrasonic levitation device is used. The ultrasonic levitation simulation method can quickly and efficiently simulate the ultrasonic levitation process of the ultrasonic levitation device, and improves the analysis efficiency of the ultrasonic levitation process.

[0012] Optionally, the ultrasonic levitation device model with the levitated particle model in the levitation space is obtained by:

[0013] obtaining device structure information of the ultrasonic levitation device;

[0014] constructing the ultrasonic levitation device model with the levitation space based on the device structure information;

[0015] setting the levitated particle model in the levitation space of the ultrasonic levitation device model.

[0016] The ultrasonic levitation simulation method provided in the application can analyze the ultrasonic levitation process of the ultrasonic levitation device. The ultrasonic levitation simulation method combines the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition, and combines the ultrasonic parameters and the particle structure parameters to perform ultrasonic levitation simulation on the ultrasonic levitation device model with the levitated particle model in the levitation space, and obtains an ultrasonic levitation simulation result. The ultrasonic levitation simulation method solves the technical problem that it is time-consuming and laborious to rely on manual adjustment to obtain an accurate standing wave field every time the ultrasonic levitation device is used. The ultrasonic levitation simulation method can quickly and efficiently simulate the ultrasonic levitation process of the ultrasonic levitation device, and improves the analysis efficiency of the ultrasonic levitation process.

[0017] Optionally, the ultrasonic levitation device boundary condition includes an inner normal displacement condition of a transducer boundary, a hard acoustic field boundary condition of a reflection boundary and a plane wave radiation boundary condition of an external boundary.

[0018] Optionally, the levitated particle boundary condition includes a particle force condition and a particle motion constraint condition.

[0019] Optionally, the pressure acoustic physical field is set, and the ultrasonic levitation device boundary condition and the levitated particle boundary condition are added based on the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, including:

[0020] The pressure acoustic physical field is set based on the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon;

[0021] adding an inner normal displacement condition of the transducer boundary, a hard sound field boundary condition of the reflecting boundary and a plane wave radiation boundary condition of the outer boundary in the pressure acoustic physical field;

[0022] adding the particle force condition and the particle motion constraint condition in the pressure acoustic physical field.

[0023] The ultrasonic levitation simulation method provided by the application can analyze the ultrasonic levitation process of the ultrasonic levitation device, improve the authenticity of simulation and the accuracy of analysis results by setting a pressure acoustic physical field and adding an inner normal displacement condition of the transducer boundary, a hard sound field boundary condition of the reflecting boundary, a plane wave radiation boundary condition of the outer boundary, a particle force condition and a particle motion constraint condition in the pressure acoustic physical field, and is beneficial to improving the analysis efficiency of the ultrasonic levitation process of the ultrasonic levitation device.

[0024] Optionally, before the ultrasonic levitation simulation based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitated particle boundary conditions is performed on the ultrasonic levitation device model with the levitated particle model in the levitated space to obtain the ultrasonic levitation simulation result, the method further includes:

[0025] performing grid division on the ultrasonic levitation device model with the levitated particle model in the levitated space.

[0026] Optionally, the ultrasonic levitation simulation based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitated particle boundary conditions is performed on the ultrasonic levitation device model with the levitated particle model in the levitated space to obtain the ultrasonic levitation simulation result, and the method includes:

[0027] setting air as the sound wave propagation medium of the levitated space;

[0028] performing the ultrasonic levitation simulation based on the sound wave propagation medium, the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitated particle boundary conditions on the ultrasonic levitation device model with the levitated particle model in the levitated space to obtain the ultrasonic levitation simulation result.

[0029] In a second aspect, the application provides an ultrasonic levitation simulation device for analyzing the ultrasonic levitation process of an ultrasonic levitation device, including:

[0030] an acquisition module for acquiring an ultrasonic levitation device model with a levitated particle model in a levitated space;

[0031] The first setting module is configured to set the ultrasonic parameter of the ultrasonic levitation device model and the particle structure parameter of the levitated particle model.

[0032] The second setting module is configured to set the pressure acoustic physical field, and add the ultrasonic levitation device boundary condition and the levitated particle boundary condition according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon.

[0033] The simulation module is configured to perform ultrasonic levitation simulation on the ultrasonic levitation device model provided with the levitated particle model in the levitation space based on the ultrasonic parameter, the particle structure parameter, the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition, to obtain an ultrasonic levitation simulation result.

[0034] The ultrasonic levitation simulation device solves the technical problem that it is time-consuming and laborious to rely on manual adjustment to obtain an accurate standing wave field every time the ultrasonic levitation device is used, and can quickly and efficiently simulate the ultrasonic levitation process of the ultrasonic levitation device, thereby improving the analysis efficiency of the ultrasonic levitation process.

[0035] In a third aspect, the present application provides an electronic device, including a processor and a memory, the memory stores a computer program executable by the processor, and when the processor executes the computer program, the steps of the ultrasonic levitation simulation method described above are executed.

[0036] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the steps of the ultrasonic levitation simulation method described above are executed.

[0037] The ultrasonic levitation simulation method, device, electronic device and storage medium provided by the present application solve the technical problem that it is time-consuming and laborious to rely on manual adjustment to obtain an accurate standing wave field every time the ultrasonic levitation device is used, and can quickly and efficiently simulate the ultrasonic levitation process of the ultrasonic levitation device, thereby improving the analysis efficiency of the ultrasonic levitation process. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 The flowchart of the ultrasonic levitation simulation method provided by the embodiments of the present application.

[0039] Figure 2 A structural schematic diagram of an ultrasonic levitation simulation device provided in an embodiment of the present application.

[0040] Figure 3 A structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0041] Label description: 1, acquisition module; 2, first setting module; 3, second setting module; 4, simulation module; 301, processor; 302, memory; 303, communication bus. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein 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 claimed present application, but only represents 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 creative work are within the scope of protection of the present application.

[0043] It should be noted that: similar labels 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. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] Please refer to Figure 1 , Figure 1 An ultrasonic levitation simulation method in some embodiments of the present application is used to analyze the ultrasonic levitation process of an ultrasonic levitation device, comprising:

[0045] Step S101, acquiring an ultrasonic levitation device model in which a levitation particle model is arranged in a levitation space;

[0046] Step S102, setting ultrasonic parameters of the ultrasonic levitation device model and particle structure parameters of the levitation particle model;

[0047] Step S103, setting a pressure acoustic physical field according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, and adding boundary conditions of the ultrasonic levitation device and boundary conditions of the levitation particle;

[0048] In step S104, 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, ultrasonic suspension simulation is performed on the ultrasonic suspension device model provided with the suspended particle model in the suspension space, to obtain an ultrasonic suspension simulation result.

[0049] The ultrasonic suspension simulation method solves the technical problem that each time the ultrasonic suspension device is used, manual adjustment is required, which is time-consuming and laborious and difficult to obtain an accurate standing wave 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.

[0050] Specifically, in step S101, the ultrasonic suspension device model provided with the suspended particle model in the suspension space is obtained, including:

[0051] Obtaining device structure information of the ultrasonic suspension device;

[0052] According to the device structure information, an ultrasonic suspension device model provided with a suspension space is constructed;

[0053] A suspended particle model is arranged in the suspension space of the ultrasonic suspension device model.

[0054] In step S101, the ultrasonic suspension device model provided with the suspension space is constructed according to the device structure information of the ultrasonic suspension device by using simulation software or modeling software, wherein the device structure information includes structure information of each component of the ultrasonic suspension device, and the ultrasonic suspension device has different structure types. According to actual needs, device structure information of a corresponding structure can be input to generate an ultrasonic transducer of a corresponding structure.

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

[0056] The suspended particle model is a solid particle, and is arranged in the suspended space to reflect the change and distribution of the standing wave sound field.

[0057] Specifically, in step S102, in the simulation software or modeling software, according to actual requirements, the ultrasonic parameters of the ultrasonic suspension device model and the particle structure parameters of the suspended particle model are set. The ultrasonic parameters include ultrasonic frequency, ultrasonic amplitude, resonant cavity length and the like, and the particle structure parameters include particle size, shape, weight and the like.

[0058] Specifically, the boundary conditions of the ultrasonic suspension device include the inner 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. The inner normal displacement condition refers to the boundary condition that the normal displacement of the emission surface is zero in the suspended space; the hard sound field boundary condition refers to the normal component of acceleration (or velocity) at the reflection surface boundary being 0; and the plane wave radiation boundary condition refers to the reflection and refraction phenomenon of sound waves on the interface composed of two different media.

[0059] The suspended particle boundary conditions include particle force condition boundary conditions and particle motion constraint boundary conditions. The particle force condition boundary conditions refer to applying acoustic force, gravity and drag force to the suspended particle model to simulate the force condition of the suspended particle; and the particle motion constraint boundary conditions refer to the suspended particle model disappearing or freezing when it reaches the air domain boundary (the air domain boundary refers to the space outside the suspended space) after moving.

[0060] 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:

[0061] The pressure acoustic physical field is set based on the ultrasonic suspension characteristics of the ultrasonic suspension phenomenon;

[0062] The inner 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 are added in the pressure acoustic physical field;

[0063] The particle force condition boundary conditions and the particle motion constraint boundary conditions are added in the pressure acoustic physical field.

[0064] It should be noted that the ultrasonic suspension characteristics refer to the characteristics of the particle suspension phenomenon caused by the action of the corresponding standing wave sound field of the ultrasonic wave.

[0065] In step S103, according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, a default pressure acoustic physical field is set in the simulation software or modeling software to make the standing wave field distributed in the levitation space, and the levitation particle model gradually reaches a stable state under the action of the standing wave field. By analyzing the levitation particle model, the distribution change and trajectory change of the levitation particle model can be obtained.

[0066] In the pressure acoustic physical field, the inner 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 are used, and the particle force condition boundary condition and the particle motion constraint boundary condition are added.

[0067] In the ultrasonic levitation device, a standing wave field is formed by controlling the frequency and phase of the ultrasonic wave. The nodes in the standing wave field act as the balance point of the acoustic radiation force. The levitation particles overcome the gravity and are stably levitated at the node position under the synergistic action of the acoustic radiation force and the restoring force. The formed standing wave field is specifically:

[0068] ;

[0069] wherein, is the acoustic radiation force received by the levitation particle; is the acoustic wave amplitude, i.e. the maximum pressure difference of the ultrasonic wave; k is the wave number; x is the position of the levitation particle in the standing wave field (i.e. the horizontal position of the levitation particle in the levitation space, specifically the horizontal position relative to each ultrasonic transducer array); kx is the phase of the ultrasonic wave; the exponential function is the time influence factor, j is the imaginary number, w is the angular frequency of the ultrasonic wave, indicating the number of rotations of the ultrasonic wave per unit time, and t is the time.

[0070] Under 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 generates an acoustic wave, but the acoustic pressure difference is one phase.

[0071] wherein, the motion velocity of the levitation particle is specifically:

[0072] ;

[0073] wherein, v is the motion velocity of the levitation particle; is the density of the propagation medium; is the ratio between the momentum change rate of the ultrasonic wave and the acoustic pressure; c is the acoustic velocity, i.e. the propagation speed of the ultrasonic wave in the propagation medium; is the vibration velocity of the levitation particle along the horizontal direction.

[0074] The radiation pressure of the suspended particle at a point in the standing wave field is proportional to the force density at the point, and the time-averaged radiation pressure is equivalent to the potential field acting on the suspended particle, and the scattering of the acoustic wave can be ignored, so the acoustic radiation force can be calculated by the sound pressure of the standing wave field without suspended particles, and the acoustic radiation force is specifically:

[0075] ;

[0076] wherein, represents taking the real part, represents taking the real part, represents taking the real part; is the complex conjugate of the motion velocity v of the suspended particle, is the complex conjugate of the acoustic radiation force ; and P is the sound pressure.

[0077] In specific applications, the shape of the suspended particle and the scattering of the acoustic wave by the shape are considered when calculating the acoustic radiation force , and the scattering corrects the acoustic radiation force , but the final result is still proportional to , so the suspended particle still stays near the node.

[0078] In summary, when simulating the ultrasonic suspension of the ultrasonic suspension device, the acoustic radiation force of the suspended particle can be qualitatively analyzed by the calculation formula of the acoustic radiation force, so that the ultrasonic suspension simulation process is more in line with the actual situation.

[0079] Specifically, before the ultrasonic suspension simulation of the ultrasonic suspension device model with the suspended particle model arranged in the suspended 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 is performed to obtain the ultrasonic suspension simulation result, further comprising:

[0080] The ultrasonic suspension device model with the suspended particle model arranged in the suspended space is meshed.

[0081] Before the ultrasonic suspension simulation, the ultrasonic suspension device model with the suspended particle model arranged in the suspended space needs to be meshed (the meshing setting can be set according to actual needs) to improve the accuracy of the simulation.

[0082] Specifically, in step S104, the ultrasonic suspension simulation of the ultrasonic suspension device model with the suspended particle model arranged in the suspended space is performed 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 the ultrasonic suspension simulation result, including:

[0083] set the air as the acoustic wave propagation medium of the levitation space;

[0084] Based on the acoustic wave propagation medium, the ultrasonic parameter, the particle structure parameter, the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition, the ultrasonic levitation simulation of the ultrasonic levitation device model with the levitated particle model in the levitation space is carried out to obtain the ultrasonic levitation simulation result.

[0085] In step S104, the air is set as the acoustic wave propagation medium of the levitation space, and according to the acoustic wave propagation medium, the ultrasonic parameter, the particle structure parameter, the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition, the ultrasonic levitation simulation of the ultrasonic levitation device model with the levitated particle model in the levitation space is carried out by using simulation software or modeling software (the ultrasonic levitation simulation process is the automatic execution process of the simulation software or the modeling software, which is not described in detail here), to obtain the ultrasonic levitation simulation result. Through analysis of the ultrasonic levitation simulation result, the optimal ultrasonic transducer phase and the optimal ultrasonic transducer setting position of the ultrasonic levitation device in different standing wave field distributions can be determined; by inputting different ultrasonic parameters or particle structure parameters, corresponding ultrasonic levitation simulation results can be obtained, so that the standing wave field distribution corresponding to different ultrasonic parameters or different particle structure parameters can be analyzed. According to actual needs, the corresponding ultrasonic levitation simulation result can be obtained for analysis, and according to the analysis result, the levitation capability of the ultrasonic levitation device can be adjusted, or according to the analysis result, the ultrasonic levitation device meeting specific needs can be produced.

[0086] As can be seen from the above, the ultrasonic levitation simulation method obtains the ultrasonic levitation device model with the levitated particle model in the levitation space, sets the ultrasonic parameter of the ultrasonic levitation device model and the particle structure parameter of the levitated particle model, sets the pressure acoustic physical field and adds the ultrasonic levitation device boundary condition and the levitated particle boundary condition according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, and based on the ultrasonic parameter, the particle structure parameter, the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition, the ultrasonic levitation simulation of the ultrasonic levitation device model with the levitated particle model in the levitation space is carried out to obtain the ultrasonic levitation simulation result; thereby, the ultrasonic levitation simulation of the ultrasonic levitation device model with the levitated particle model in the levitation space is carried out by combining the ultrasonic parameter and the particle structure parameter through the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitated particle boundary condition to obtain the ultrasonic levitation simulation result, which solves the technical problem that the standing wave field needs to be adjusted manually every time the ultrasonic levitation device is used, which is time-consuming and laborious and difficult to obtain accurate results, and can quickly and efficiently simulate the ultrasonic levitation process of the ultrasonic levitation device, thereby improving the analysis efficiency of the ultrasonic levitation process.

[0087] Reference Figure 2The application provides an ultrasonic levitation simulation device for analyzing an ultrasonic levitation process of an ultrasonic levitation device, comprising:

[0088] An acquisition module 1 is configured to acquire an ultrasonic levitation device model provided with a levitation particle model in a levitation space;

[0089] A first setting module 2 is configured to set ultrasonic parameters of the ultrasonic levitation device model and particle structure parameters of the levitation particle model;

[0090] A second setting module 3 is configured to set a pressure acoustic physical field and add boundary conditions of the ultrasonic levitation device and boundary conditions of the levitation particle according to ultrasonic levitation characteristics of the ultrasonic levitation phenomenon;

[0091] A simulation module 4 is configured to perform ultrasonic levitation simulation on the ultrasonic levitation device model provided with the levitation particle model in the levitation space based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the boundary conditions of the ultrasonic levitation device and the boundary conditions of the levitation particle, and obtain an ultrasonic levitation simulation result.

[0092] The ultrasonic levitation simulation device performs ultrasonic levitation simulation on the ultrasonic levitation device model provided with the levitation particle model in the levitation space by the pressure acoustic physical field, the boundary conditions of the ultrasonic levitation device and the boundary conditions of the levitation particle, in combination with the ultrasonic parameters and the particle structure parameters, and obtains an ultrasonic levitation simulation result, thereby solving the technical problem that it is time-consuming and laborious to rely on manual adjustment each time the ultrasonic levitation device is used and it is difficult to obtain an accurate standing wave field, and enabling the ultrasonic levitation process of the ultrasonic levitation device to be simulated quickly and efficiently, and improving the analysis efficiency of the ultrasonic levitation process.

[0093] Specifically, the acquisition module 1 acquires the ultrasonic levitation device model provided with the levitation particle model in the levitation space, comprising:

[0094] Acquiring device structure information of the ultrasonic levitation device;

[0095] Constructing the ultrasonic levitation device model provided with the levitation space according to the device structure information;

[0096] Setting the levitation particle model in the levitation space of the ultrasonic levitation device model.

[0097] When the acquisition module 1 is executed, the ultrasonic levitation device model provided with the levitation space is constructed according to the device structure information of the ultrasonic levitation device by simulation software or modeling software, wherein the device structure information comprises structure information of each component of the ultrasonic levitation device, and the ultrasonic levitation device has different structure types, and the device structure information of the corresponding structure can be input according to actual needs to generate the ultrasonic transducer of the corresponding structure.

[0098] For example, the structure of the ultrasonic levitation device includes an ultrasonic transducer array, a bracket, and an adjusting rod, wherein the ultrasonic transducer array is fixedly connected with the bracket, the bracket is movably connected with the adjusting rod, one ultrasonic levitation device is provided with at least two ultrasonic transducer arrays, a plurality of ultrasonic transducers are arranged in one ultrasonic transducer array, the emitting surfaces of the at least two ultrasonic transducer arrays are oppositely arranged, a standing wave sound field is formed by the acoustic force (acoustic radiation force, an action force of object movement caused by sound, here, the acoustic force of ultrasonic waves) between the emitting surfaces, and a levitation space is formed between the emitting surfaces. The distance between the ultrasonic transducer arrays can be adjusted by the adjusting rod to adjust the standing wave sound field, the levitation space, and the levitation capability.

[0099] A levitated particle model is arranged in the levitation space of the ultrasonic levitation device model, wherein the levitated particle model is a solid particle, and the levitated particle model is arranged in the levitation space to reflect the change and distribution of the standing wave sound field.

[0100] Specifically, the first setting module 2, when executed, sets the ultrasonic parameters of the ultrasonic levitation device model and the particle structure parameters of the levitated particle model in the simulation software or the modeling software according to actual requirements. The ultrasonic parameters include ultrasonic frequency, ultrasonic amplitude, and resonant cavity length, and the particle structure parameters include the size, shape, and weight of the particle.

[0101] Specifically, the boundary conditions of the ultrasonic levitation device include an inner normal displacement condition of the transducer boundary, a hard sound field boundary condition of the reflecting boundary, and a plane wave radiation boundary condition of the external boundary. The inner normal displacement condition refers to a boundary condition that the normal displacement of the emitting surface in the levitation space is zero. The hard sound field boundary condition refers to a boundary condition that the normal component of the acceleration (or velocity) at the reflecting surface boundary is 0. The plane wave radiation boundary condition refers to a description of the reflection and refraction of sound waves on the interface composed of two different media.

[0102] The boundary conditions of the levitated particle include a particle force condition boundary condition and a particle motion constraint boundary condition. The particle force condition boundary condition refers to the application of acoustic force, gravity, and drag force to the levitated particle model to simulate the force condition of the levitated particle. The particle motion constraint boundary condition refers to the disappearance or freezing of the levitated particle model when it reaches the air domain boundary (the space outside the levitation space) after moving.

[0103] Specifically, the second setting module 3, when setting the pressure acoustic physical field according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon and adding the boundary conditions of the ultrasonic levitation device and the boundary conditions of the levitated particle, executes:

[0104] setting the pressure acoustic physical field based on the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon;

[0105] Adding the inner normal displacement condition of the transducer boundary, the hard sound field boundary condition of the reflective boundary and the plane wave radiation boundary condition of the outer boundary in the pressure acoustic physical field;

[0106] Adding the particle force condition and the particle motion constraint condition in the pressure acoustic physical field.

[0107] It should be noted that the ultrasonic suspension characteristic refers to the characteristic that the particle is suspended under the action of the corresponding standing wave sound field of the ultrasonic wave.

[0108] The second setting module 3, when executed, sets a pressure acoustic physical field with default settings in the simulation software or the modeling software according to the ultrasonic suspension characteristic of the ultrasonic suspension phenomenon, so that the standing wave sound field is distributed in the suspension space, the suspended particle model is gradually stabilized under the action of the standing wave sound field, and the distribution change and the trajectory change of the suspended particle model can be obtained by analyzing the suspended particle model.

[0109] In the pressure acoustic physical field, the inner normal displacement condition of the transducer boundary, the hard sound field boundary condition of the reflective boundary and the plane wave radiation boundary condition of the outer boundary are used, and the particle force condition and the particle motion constraint condition are added.

[0110] In the ultrasonic suspension device, the standing wave sound field is formed by controlling the frequency and phase of the ultrasonic wave, the wave node in the standing wave sound field acts as a balance point of the acoustic radiation force, and the suspended particle overcomes the gravity and is stably suspended at the wave node position under the synergistic action of the acoustic radiation force and the restoring force. The formed standing wave sound field is specifically:

[0111] ;

[0112] wherein, is the acoustic radiation force received by the suspended particle; is the acoustic 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; the exponential function is a time factor, j is an imaginary number, w is the angular frequency of the ultrasonic wave, indicating the number of rotations of the ultrasonic wave per unit time, and t is time.

[0113] According to the Euler equation (that is, the momentum conservation equation of the fluid), the vibration velocity of the air also generates the acoustic wave, but the acoustic pressure difference of the ultrasonic wave is phase.

[0114] wherein, the motion rate of the suspended particle is specifically:

[0115] ;

[0116] wherein v is the velocity of the suspended particle; is the density of the propagation medium; is the ratio between the rate of change of momentum of the ultrasonic wave and the sound pressure; c is the sound velocity, i.e. the propagation speed of the ultrasonic wave in the propagation medium; is the velocity of the suspended particle along the horizontal direction.

[0117] With respect to the suspended particle, the radiation pressure at a point in the standing wave acoustic field is proportional to the force density at the point, while the time-averaged radiation pressure is equivalent to the potential field acting on the suspended particle, and the scattering of the acoustic wave by it can be ignored, so that the acoustic radiation force can be calculated using the sound pressure of the standing wave acoustic field without the suspended particle, and therefore the acoustic radiation force is specifically:

[0118]

[0119] wherein, represents taking the real part, represents taking the real part of, represents taking the real part of; is the complex conjugate of the velocity v of the suspended particle, is the complex conjugate of the acoustic radiation force ; P is the sound pressure.

[0120] In specific applications, the shape of the suspended particle and the scattering of the acoustic wave by the shape are considered when calculating the acoustic radiation force , and the scattering corrects the acoustic radiation force , but the final result is still proportional to , so the suspended particle still stays near the node.

[0121] In summary, when simulating the ultrasonic suspension of the ultrasonic suspension device, the acoustic radiation force of the suspended particle can be qualitatively analyzed by the calculation formula of the acoustic radiation force, so that the ultrasonic suspension simulation process is more in line with the actual situation.

[0122] Specifically, the ultrasonic suspension simulation device further comprises:

[0123] The division module is configured to divide the ultrasonic suspension device model in which the suspended particle model is arranged in the suspended space into grids.

[0124] Before the ultrasonic suspension simulation, the ultrasonic suspension device model in which the suspended particle model is arranged in the suspended space needs to be divided into grids (the setting of the grid division can be set according to actual needs) to improve the accuracy of the simulation.

[0125] ​Specifically, the simulation module 4, when performing the ultrasonic levitation simulation on the ultrasonic levitation device model with the levitated particle model in the levitation space based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitated particle boundary conditions to obtain the ultrasonic levitation simulation result, executes:

[0126] setting air as the sound wave propagation medium of the levitation space;

[0127] performing the ultrasonic levitation simulation on the ultrasonic levitation device model with the levitated particle model in the levitation space based on the sound wave propagation medium, the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitated particle boundary conditions to obtain the ultrasonic levitation simulation result.

[0128] When the simulation module 4 is executed, air is set as the sound wave propagation medium of the levitation space, and the ultrasonic levitation simulation is performed on the ultrasonic levitation device model with the levitated particle model in the levitation space based on the sound wave propagation medium, the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitated particle boundary conditions by using simulation software or modeling software (the ultrasonic levitation simulation process is an automatic execution process of the simulation software or the modeling software, which is not described in detail here) to obtain the ultrasonic levitation simulation result. Through analysis of the ultrasonic levitation simulation result, the optimal ultrasonic transducer phase and the optimal ultrasonic transducer setting position of the ultrasonic levitation device in different standing wave field distributions can be determined; by inputting different ultrasonic parameters or particle structure parameters, corresponding ultrasonic levitation simulation results can be obtained, so that the standing wave field distributions corresponding to different ultrasonic parameters or different particle structure parameters can be analyzed. According to actual needs, the corresponding ultrasonic levitation simulation results can be obtained for analysis, and according to the analysis results, the levitation ability of the ultrasonic levitation device can be adjusted, or according to the analysis results, the ultrasonic levitation device meeting specific requirements can be produced.

[0129] From the above, the ultrasonic levitation simulation device, by obtaining the ultrasonic levitation device model provided with the levitation particle model in the levitation space, setting the ultrasonic parameters of the ultrasonic levitation device model and the particle structure parameters of the levitation particle model, setting the pressure acoustic physical field according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon and adding the ultrasonic levitation device boundary conditions and the levitation particle boundary conditions, based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitation particle boundary conditions, the ultrasonic levitation simulation of the ultrasonic levitation device model provided with the levitation particle model in the levitation space is carried out, and the ultrasonic levitation simulation result is obtained; thereby, through the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitation particle boundary conditions, the ultrasonic levitation simulation of the ultrasonic levitation device model provided with the levitation particle model in the levitation space is carried out in combination with the ultrasonic parameters and the particle structure parameters, and the ultrasonic levitation simulation result is obtained, 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 laborious and difficult to obtain accurate standing wave field, and can quickly and efficiently simulate the ultrasonic levitation process of the ultrasonic levitation device, and improves the analysis efficiency of the ultrasonic levitation process.

[0130] Please refer to Figure 3 , Figure 3 A structure schematic diagram of an electronic device provided by the embodiment of the present application, the present application provides an electronic device, comprising: 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 mechanism (not marked), the memory 302 stores a computer program executable by the processor 301, when the electronic device runs, the processor 301 executes the computer program to execute the ultrasonic levitation simulation method in any optional implementation manner of the above-mentioned embodiment, to realize the following functions: obtaining the ultrasonic levitation device model provided with the levitation particle model in the levitation space, setting the ultrasonic parameters of the ultrasonic levitation device model and the particle structure parameters of the levitation particle model, setting the pressure acoustic physical field according to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon and adding the ultrasonic levitation device boundary conditions and the levitation particle boundary conditions, based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the levitation particle boundary conditions, the ultrasonic levitation simulation of the ultrasonic levitation device model provided with the levitation particle model in the levitation space is carried out, and the ultrasonic levitation simulation result is obtained.

[0131] The embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to execute the ultrasonic levitation simulation method in any optional implementation manner of the above embodiment, so as to realize the following functions: obtaining an ultrasonic levitation device model provided with a levitation particle model in a levitation space, setting ultrasonic parameters of the ultrasonic levitation device model and particle structure parameters of the levitation particle model, setting a pressure acoustic physical field and adding an ultrasonic levitation device boundary condition and a levitation particle boundary condition according to ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, performing ultrasonic levitation simulation on the ultrasonic levitation device model provided with the levitation particle model in the levitation space based on the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary condition and the levitation particle boundary condition, and obtaining an ultrasonic levitation simulation result. The storage medium can be realized by any type of volatile or non-volatile storage device or a combination thereof, such as a static random access memory (SRAM), an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a programmable read-only memory (PROM), a read-only memory (ROM), a magnetic memory, a flash memory, a magnetic disk or an optical disk.

[0132] In the embodiments of the present application, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between the units can be indirect coupling or communication connection through some communication interfaces, devices or units, and can be electrical, mechanical or other forms.

[0133] In addition, the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, which can be located in one place, or can be distributed on a plurality of network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiment.

[0134] Further, each functional module in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0135] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

[0136] The above description is merely illustrative of the application, and not in limitation of the principles of the application. Any modification and change of the application, which can be made by those skilled in the art without departing from the spirit and principle of the application, shall be included in the scope of the application.

Claims

1. An ultrasonic levitation simulation method for analyzing the ultrasonic levitation process of an ultrasonic levitation device, characterized in that: Including steps: Obtaining an ultrasonic suspension device model having a suspended particle model disposed in a suspension space; Setting the ultrasonic parameters of the ultrasonic levitation device model and the particle structure parameters of the suspended particle model; According to the ultrasonic levitation characteristics of the ultrasonic levitation phenomenon, the pressure acoustic physical field is set and the ultrasonic levitation 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 levitation device boundary conditions and the suspended particle boundary conditions, 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.

2. The ultrasonic levitation simulation method according to claim 1, characterized in that: Obtaining an ultrasonic suspension device model having a suspended particle model disposed in a suspension space, including: Acquiring device structure information of the ultrasonic levitation device; Constructing an ultrasonic suspension device model provided with a suspension space according to the device structure information; A suspended particle model is set 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 levitation device include an inner normal displacement condition of the transducer boundary, a hard sound field boundary condition of the reflection boundary, and a plane wave radiation boundary condition of the 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 levitation characteristics of the ultrasonic levitation phenomenon, the pressure acoustics physics field is set up and the ultrasonic levitation 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 up; Adding an internal 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 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 levitation device boundary conditions, and the suspended particle boundary conditions, an ultrasonic levitation simulation is performed on an ultrasonic levitation device model having a suspended particle model disposed in the suspension space, and before obtaining the ultrasonic levitation simulation result, the method further includes: The ultrasonic suspension device model having the suspended 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 levitation device boundary conditions, and the suspended particle boundary conditions, an ultrasonic levitation device model having a suspended particle model disposed in the suspension space is subjected to ultrasonic levitation simulation to obtain an ultrasonic levitation simulation result, including: Setting air as the sound wave propagation medium of the suspension space; Based on the sound wave propagation medium, the ultrasonic parameters, the particle structure parameters, the pressure acoustic physical field, the ultrasonic levitation device boundary conditions and the suspended particle boundary conditions, an ultrasonic levitation simulation is performed on an ultrasonic levitation device model in which a suspended particle model is set in the suspension space to obtain an ultrasonic levitation simulation result.

8. An ultrasonic levitation simulation device for analyzing the ultrasonic levitation process of an ultrasonic levitation device, characterized in that: include: An acquisition module, configured to acquire a model of an ultrasonic suspension device having a suspended particle model disposed in a suspension space; A first setting module 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 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; A simulation module is used to perform ultrasonic levitation simulation on an ultrasonic levitation 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 levitation device boundary conditions and the suspended particle boundary conditions, to obtain an ultrasonic levitation simulation result.

9. An electronic device, characterized in that: The method 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, the method runs the steps of 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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