33 results about "Particle collision" patented technology

The invention discloses a method, a device, equipment and a medium for simulating migration of a proppant, and relates to the technical field of analogue simulation. Simulation is carried out through fluid dynamics and a discrete element analysis model, specifically, fluid parameters are obtained, a calculation model is constructed, and constraints are set; parameters are input for fluid and particle stress analysis, and particle displacement and grid updating are calculated; contact is judged through the particle collision sequence, boundary force is calculated, and the particle motion state is updated; and cyclically feeding back the flow field parameters to particle stress analysis until the number of iterations is met so as to obtain the void ratio, the flow velocity, the position and the momentum of the particles. According to the invention, the motion among particles can be captured and accurately calculated in a high-concentration particle flow or particle dominated collision system.

The utility model discloses a particle collision experiment device, which comprises a liquid container, a particle collision experiment device and a particle collision experiment device, the falling adjusting frame is arranged on the outer side of the liquid container and used for supporting, positioning and throwing particles; the falling adjusting frame comprises a stable bottom frame, a fixed vertical rod is vertically and fixedly connected to the upper end of one side of the stable bottom frame, and a fixed transverse rod is transversely and fixedly connected to the top of the fixed vertical rod. According to the particle collision experiment device provided by the utility model, the fixed vertical rods and structures above the fixed vertical rods can be supported through the stable underframe, and the positions of particles in the horizontal direction can be adjusted by sliding the movable longitudinal rods through the movable connection of the movable longitudinal rods and the fixed transverse rods; the vertical position of the particulate matter can be adjusted by sliding the movable vertical rod through vertical position sliding of the movable vertical rod and the movable longitudinal rod, and the experiment requirement of the falling position of the particulate matter can be met through two-way position adjustment.

A particle track discovery method based on graph neural network cellular automaton, which utilizes a high-energy physics detector to record a plurality of particle hit data generated in a particle collision event, including the position, direction and momentum of the particle at its hit point; using a plurality of particle hit data generated in multiple particle collision events to supervise the training of a graph neural network, and equivalently calculating a generated graph neural cellular automaton; adding the graph neural cellular automaton conversion rule into a conversion rule library; selecting a plurality of graph neural cellular automaton conversion rules from the conversion rule library, equivalently calculating a corresponding plurality of graph neural networks; applying the plurality of graph neural networks in step three to a new particle collision experiment, inputting a plurality of groups of measurement values of the same particle obtained in the new particle collision experiment into the plurality of graph neural networks, obtaining a plurality of different predicted tracks, and discovering the real track of the particle from the different predicted tracks according to the known physical properties of the particle.

The invention relates to a particle collision device (10) for detecting an electrical charge after a collision of a particle (12) with a collision partner (14), with an acoustic particle holding device (16), a particle preparation device (32) for changing at least one particle property of the particle (12), a collision partner (14) and a charge detector (28) which is configured to detect an electrical charge of the particle (12) and / or the collision partner (14) after a collision of particle (12) and collision partner (14).

The present application relates to the technical field of physical experiment equipment, and particularly relates to an intelligent precise control wet particle elastic recovery coefficient measuring device, which comprises a sealed box connected with a vacuum control device, a support frame arranged in the sealed box, a particle collision device comprising a first collision plane and a second collision plane, the first collision plane being arranged on the bottom surface of the support frame, the second collision plane being arranged on one side of the support frame and being perpendicular to the first collision plane, and a particle releasing device comprising a first vacuum releasing device, a first electromagnetic releasing device, a second electromagnetic releasing device and a second vacuum releasing device, the first vacuum releasing device and the first electromagnetic releasing device being arranged on the top of the support frame and being arranged towards the first collision plane, and the second electromagnetic releasing device and the second vacuum releasing device being arranged on the middle part of the support frame. The motion trajectory of the rebound process of the particles is shot on different planes, so that the wet particle elastic recovery coefficient can be measured more accurately.

The present invention provides a method for predicting the particle collision characteristics in solid-state additive manufacturing based on machine learning. On the basis of multiple simulations, the existing data is sorted out, and an artificial neural network is established based on machine learning. By making full use of the existing simulation data, the prediction of the particle collision characteristics under unknown parameters is realized, saving time and computational costs and achieving rapid prediction; it is convenient to study the influence of multiple experimental parameters on the simulation results simultaneously.

The invention provides a method for predicting the motion trail of particles in a GIS equipment cavity, and relates to the technical field of state monitoring of high-voltage electrical equipment, and the method comprises the steps: obtaining non-spherical particle collision parameters, and building a mapping database; constructing a contact force model of collision between the particles and the wall surface, and inputting data of the mapping database into the contact force model to output predicted motion tracks of all the particles; performing on-line monitoring on the motion trail of the particles in the GIS equipment cavity by using an ultrasonic and ultrahigh frequency UHF sensor, and outputting a high-confidence inversion trail of the particles; a high-frame-rate binocular vision system is adopted to collect a particle motion sequence, and a high-precision reference trajectory of particles is generated through a three-dimensional reconstruction equation; comparing the predicted motion trajectory and the inversion trajectory of the particles with a reference trajectory, and outputting a final predicted trajectory of the particle motion; the GIS equipment operation state monitoring accuracy and the fault risk early warning capability can be remarkably improved, and key technical support is provided for guaranteeing reliable GIS operation.

The present invention relates to a method for measuring the coefficient of restitution of nano-sphere particle collision based on molecular dynamics, comprising: establishing two nano-sphere Al2O3 particle models using OVITO software; placing a nitrogen molecule model, an oxygen molecule model, and the two particle models in a simulation box to form a simulation object system, and importing the LAMMPS software; using comb3 and lj / cut mixed potential; setting simulation parameters, performing molecular dynamics simulation, obtaining parameter data during the movement of the particle model, and observing the deformation of the particle model during the collision process; post-processing the parameter data to obtain a force-displacement curve of the particle model, judging the collision occurrence and end time of the particle model, and determining the collision velocity of the particle model and the separation velocity during rebound, and calculating the collision coefficient of restitution of the particle model based on the velocity changes before and after the collision. The present invention overcomes the limitations of traditional methods and improves measurement accuracy.

The present application discloses a method, device, medium, and product for determining the trajectory of particle collision points under the shadow effect of a hexagonal lattice, and relates to the field of theoretical simulation of the microscopic morphology of dry etching and thin film deposition surfaces. The present application splits the hexagonal lattice model into odd-numbered lattice units and even-numbered lattice units based on the layer height of the three-dimensional lattice stack; by first calculating the odd and even layers separately and then merging and comparing them, the problem of spatial position misalignment between adjacent odd and even layers is solved, reducing the difficulty of numerical processing; by determining the vertical distance between the vertical line and the particle flight trajectory line, the lattice units without collision under the contour surface of the hexagonal lattice model are eliminated in real time, saving the amount of calculation; by determining the projection component, the collision point of the particle with the three-dimensional surface morphology during flight is obtained, achieving efficient positioning of the collision point, and improving the efficiency of determining the trajectory of the particle collision point under the shadow effect of the hexagonal lattice.

A particle collision contact time measurement method and apparatus. The method comprises the following steps: focusing a continuous laser to form a light beam, the beam waist diameter of which is smaller than the diameter of a particle to be measured; emitting said particle to a beam waist position of the laser; quantitatively monitoring a light intensity change; and obtaining a duration in which the laser is occluded by said particle to the greatest extent or obtaining a duration after an output voltage of an oscilloscope is reduced to the minimum. Thus, the measurement of a particle collision contact time is realized. By quantitatively monitoring the light intensity change, the duration in which the laser is occluded by said particle to the greatest extent is obtained, so that the measurement of the particle collision contact time is realized. The method has advantages such as being capable of measuring a particle collision contact time down to the scale of a laser diffraction limit, and not being affected by material limitations of whether a particle is conductive, charged, etc., and the method can record the particle collision contact time with extremely high precision.

The utility model provides a ball screw type particle collision damper, and relates to the technical field of dampers. The damper comprises an outer sleeve, the two ends of the outer sleeve are provided with a first opening and a second opening respectively, and a first space is formed in the outer sleeve; the inner sleeve is located in the first space and rotatably connected with the outer sleeve, a second space communicated with the first space is formed in the inner sleeve, and a containing cavity is formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve; particle balls are arranged in the accommodating cavity; the end, close to the second opening, of the inner sleeve is fixedly connected with a second mounting base. The ball screw comprises a screw rod and a nut, the nut is fixed at the first opening, one end of the screw rod is connected with a first mounting seat, and the other end of the screw rod extends into the second space through the first space. Axial vibration is converted into high-speed rotating motion, the number of times of collision between the particle balls is increased, the problem that the particle balls are difficult to collide when load excitation is small is solved, and the efficiency of the damper is greatly improved.

The invention discloses a fine-scale droplet and particle collision high-speed microscopic test device and method, and the device comprises a vibration isolation platform pedestal, and the top of the vibration isolation platform pedestal is provided with a closed glass body cover; the collision generation system comprises a displacement control unit, a fine-scale liquid drop generation unit and a particle control unit, the displacement control unit is installed on the shock isolation platform base, and the fine-scale liquid drop generation unit and the particle control unit are installed on the displacement control unit; the calibration system is mounted on the closed glass body cover; the high-speed microscopic test system is mounted on the shock insulation platform base; and the data processing and analyzing system is connected with the high-speed microscopic testing system. According to the high-speed microscopic testing system, the microscopic morphology observation precision in the fine-scale dust collision process is well improved, and the collision accuracy of liquid drops and particles is remarkably improved through the heavy hammer-assisted laser calibration system.

The application discloses a numerical simulation method and device for particle collision retrieval in dense-phase gas-solid flow based on GPU parallel calculation, realizes large-scale parallel solution of a neighborhood particle collision retrieval algorithm in dense-phase gas-solid flow numerical simulation research on a computer graphics processing unit (GPU), realizes a parallel prefix sum algorithm in combination with CUDA programming and OpenACC instructions, writes particle collision retrieval results into an array, establishes a particle collision list, obtains dense-phase particle collision retrieval results, and is used for calculating collision forces between particles. The application overcomes the deficiency that a great amount of calculation is consumed in particle neighborhood collision retrieval by a traditional discrete element method, and fills the blank of the discrete element method in efficient processing of large-scale particle collision information.

The application provides a parallel computing method for gas-solid simulation, which comprises the following steps: forming a geometric boundary as a solid by building a plurality of static geometric shape units according to a multiphase complex boundary condition; setting an initial state of a system to be simulated, and adopting a spherical or ellipsoidal particle model for a gas particle; performing spatial decomposition on the system to be simulated to obtain a plurality of sub-regions, each of which comprises an interior and a boundary, the interior is simulated by a hard sphere, and the boundary is simulated by a pseudo-particle, each of the sub-regions is divided into a plurality of grids, a mapping relationship between the particles and the grids is established, and the geometric boundary in each of the grids is calculated; within a set time step, updating particle information based on event driving and in view of particle collision in the interior of each of the sub-regions and particle collision between the particles and the geometric boundary; updating the particle information based on time driving and in view of particle collision on the boundary of each of the sub-regions and particle collision between the particles and the geometric boundary; and outputting a simulation result.

The invention discloses a particle collision passive damper based on magnetic liquid, belonging to the field of vibration control. The invention successfully solves the problem that the existing particle collision damper cannot be applied to low-frequency vibration and weightless environment. The damper comprises a ball (1), a magnetic liquid (2), a spherical permanent magnet (3), a shell (4) and an elastic rubber shell (5). When external vibration occurs, the ball (1) and the spherical magnetic field source composed of the spherical permanent magnet (3) and the elastic rubber shell (5) move and collide in the shell (4), thereby generating fluid viscous damping and collision damping to absorb energy and achieve the purpose of vibration reduction. The damper is suitable for low-frequency vibration below 10 Hz and also has very good effect on high-frequency vibration above 100 Hz.

The application relates to the technical field of particle simulation, and discloses a particle collision method, device and equipment based on physical simulation and a storage medium, the method comprises the following steps: determining current parameters of each particle in a particle system based on initial parameters and external force parameters of each particle; detecting collision information between each particle and / or collision information between the particle and other objects in the particle system through a collision detection algorithm; and updating target collision parameters of each particle based on a collision model, the current parameters and the collision information. In the foregoing manner, the initial parameters and the external force parameters of the particles are considered to more accurately simulate the motion state of the particles under the action of force, a preset collision detection algorithm is used to detect the collision information between the particles and between the particles and other objects in the system, the simulation effect is more realistic, powerful technical support is provided for simulating complex physical phenomena, and the accuracy of the particle collision effect is improved.

The application is suitable for the technical field of material identification, and provides a particle material identification method, device and electronic equipment. The method comprises the following steps: obtaining an original sound signal generated by particle collision, frame dividing the original sound signal to obtain multiple frames of sound signals; calculating a frequency band variance value corresponding to each frame of sound signal in the multiple frames of sound signals, and determining a pulse decision value of each frame of sound signal according to the frequency band variance value corresponding to each frame of sound signal; determining multiple pulse signal segments of the particle according to the pulse decision value of each frame of sound signal and the frequency band variance value corresponding to each frame of sound signal, and constructing a reconstructed sound signal of the particle based on the multiple pulse signal segments; performing feature extraction on the reconstructed sound signal to obtain a feature vector of the particle, and inputting the feature vector into a preset material identification model to obtain the material of the particle. The application can construct the reconstructed sound signal in real time and accurately, and then accurately identify the material of the particle based on the reconstructed sound signal.

Based on the magnetic liquid suspension characteristics of semi-active particle collision damper, belongs to the field of vibration control. Successfully solved the existing particle collision damper cannot be applied to low frequency vibration, and the semi-active control effect is not good. The damper includes a ball (1), a magnetic liquid (2), a lower magnetic field source (3), a shell (4) and an excitation coil (5), when the external vibration, the ball (1) in the shell (4) movement and collision, produce fluid viscous damping and collision damping to absorb energy. In addition, the excitation coil (5) according to the vibration, at any time to the magnetic liquid (2) in the shell (4) to apply magnetic field excitation, change the suspension force of magnetic liquid (2), so as to change the size of the damping, achieve the semi-active control of vibration.

The invention discloses a quantum field theory high-performance coprocessor based on path integration and a method thereof, and belongs to the field of high-energy physical calculation, particle collision simulation, quantum color dynamics and quantum gravity calculation. Comprising a functional integral discretization engine (FIDE), a Feynman graph automatic generator (FAGG), a Wick contraction accelerator (WCA), a reformer group flow engine (RGFE), a path integral Monte Carlo sampler (PIMCS), a correlation function calculation unit (CFCU), a symmetry breaking detector (SSBD), a vacuum energy extractor (VEE), a Fermi determinant solver (FDS), a topological charge calculator, a circle graph integral optimizer, a Ward identical verifier and a cross-theory mapper. A hardware acceleration interface; according to the invention, an ASIC + GPU + quantum mixed framework is adopted, leading-edge applications such as LHC collision cross section prediction, quark gum plasma simulation, dark substance interaction calculation, early universe phase change research, quantum gravitational non-perturbation effect and the like are supported, and accurate inspection of a particle physical standard model and new physical search beyond the standard model are promoted.

The invention discloses a discrete element method recovery coefficient correction method based on a steel ball falling-into-water experiment, and belongs to the field of multi-parameter collision discrete element methods. The invention aims to solve the problem of insufficient precision of a recovery coefficient caused by neglect of liquid viscosity in a particle collision simulation process of an existing discrete element method. According to the method, a steel ball falling-into-water experiment is designed, steel balls with different diameters, a transparent water tank, a high-speed camera, a graduated scale and other equipment are utilized, the rebound height of the steel balls under multiple working conditions is collected, and then actual recovery coefficient data are calculated; a dynamic correction model considering the collision speed, the steel ball diameter and the liquid level is constructed through data analysis; and finally, embedding the model into a discrete element method collision module to realize real-time correction of a recovery coefficient. Experimental verification shows that the method can reduce the simulation errors such as the steel ball motion trail and the rebound height to be within 5%, the simulation precision of the particle collision process is remarkably improved, and the method is suitable for related engineering design in the fields of water conservancy, mining industry and the like and has high practical value.

The invention discloses a deep-sea mining particle collision launching device and a control method. The launching device comprises a double-wheel reverse driving module, a sliding rail distance adjusting mechanism and a feeding system. The working surfaces of two friction wheels in the double-wheel reverse driving module are arranged in parallel in a coplanar manner, and the opposite-direction rotating movement with synchronous rotating speed is realized through a speed regulator, so that a bidirectional clamping acceleration structure for particles is formed; the sliding rail distance adjusting mechanism is connected with the two motors, and the distance between the two friction wheels is adjusted in a stepless mode according to the size of particles to be emitted. The feeding system is located under the contact area of the two friction wheels and comprises a particle storage cavity, a feeding channel and a steering engine, the steering engine controls opening and closing of the feeding channel to achieve directional feeding of particles, and the particle storage cavity is in butt joint with the contact area of the two friction wheels; through double-wheel reverse acceleration, the initial velocity of the particles is adjustable, and the device has important significance in studying the collision characteristic of the particles and the pipeline and the collision process between the walls of the pipeline.

This invention proposes a variable scaling method for PIC-MCC models, comprising: establishing an initial PIC-MCC physical model; selecting a scaling factor and, following the discharge similarity law, constructing variable scaling relationships between plasma density, collision cross section, and particle kinetic energy in a scaled-down PIC-MCC simulation model corresponding to the PIC-MCC physical model; determining variable scaling relationships between thermocurrent density, plasma frequency, particle collision frequency, and particle collision probability in the scaled-down PIC-MCC simulation model; determining the variable scaling relationship parameters in the scaled-down PIC-MCC simulation model, conducting plasma particle simulation, and mapping the calculation results of the scaled-down PIC-MCC simulation model back to the initial PIC-MCC physical model. This invention solves the problems of existing scaling techniques exacerbating plasma instability and local electric field effects, and maintains undistorted simulation results even at large scaling ratios, significantly improving calculation accuracy.

This disclosure provides a tooling fixture, comprising: a base (1) with a positioning groove area (11) in the middle, the positioning groove area (11) being used to place the device under test; a cover plate (2) detachably covering the base (1) and cooperating with the base (1) to fix the device under test; and a limiting structure (3) being annular, the base (1) being embedded in the limiting structure (3) so that the base (1) does not rotate spirally relative to the limiting structure (3). By transforming a large-size packaged device with a flexible lead frame protective ring into a rigid connection structure, this tooling fixture solves the problem of deformation and shaking of the device under test under mechanical shock and high-frequency vibration in particle collision noise detection tests, which causes the transducer to collect noise and affect the test results, thereby improving the accuracy of the test results.

The invention relates to a particle collision device (10) for detecting an electrical charge after collision of a particle (12) with a collision partner (14), comprising an acoustic particle holding device (16), a particle preparation device (32) for modifying at least one particle property of the particle (12), a collision partner (14), and a charge detector (28) designed to detect an electrical charge of the particle (12) and / or of the collision partner (14) after a collision of the particle (12) and the collision partner (14).

The present invention discloses a test device and method for testing multiphase particle collisions in a spray fluidized bed. The test device comprises a quasi-two-dimensional spray particle fluidization system, a high-speed photography system, and a control system. A multiphase particle collision test is performed in the quasi-two-dimensional spray particle fluidization system. Images are captured using the high-speed photography system. By establishing and verifying a CFD-DEM spray fluidized bed simulation, preparing a neural network training data set and training image segmentation, and performing event classification, a deep neural network is established. Finally, the particle collision velocity and collision frequency in the entire fluidized bed are accurately measured from the high-speed photography particle images.

The invention discloses a guniting robot in-situ operation simulation method and system based on mixed reality. The method comprises the steps that a mixed reality environment is configured; spouting particle simulation; spraying a patch to be attached to the surface; managing a spraying and pasting object; carrying out persistence and visual analysis on the guniting effect; compiling deployment and on-site in-situ simulation are carried out. The invention provides a real environment driven guniting robot in-situ operation simulation method based on a mixed reality technology. Accurately linking a virtual guniting effect with a real environment surface by using a mixed reality technology; the simulation of the guniting track, the guniting thickness distribution and the coverage rate is realized by combining a physical engine and a dynamic particle collision detection algorithm. The digital construction rehearsal tool provided by the invention solves the problems of dependence on manual trial spraying, large off-line simulation deviation and lack of real-time feedback in the traditional process, and remarkably improves the construction quality and the intelligent level.

Magnetic liquid passive dynamic vibration absorber using particle collision damping belongs to the field of vibration control. It successfully solves the problem that existing particle collision dampers cannot be applied to low-frequency vibration and semi-active control effect is poor. The damper includes a shell (1), a left ball (2), a left flow baffle (3), a permanent magnet (4), a magnetic liquid (5), a right flow baffle (6) and a right ball (7). When the outside is subjected to low-frequency vibration, liquid viscous damping is generated between the permanent magnet (4) and the magnetic liquid (5), and the vibration energy is reduced. When the outside is subjected to high-frequency vibration, particle collision damping is generated in the chamber where all the left balls (2) and right balls (7) are located, and the vibration energy is reduced.

Active control particle collision damper based on magnetic liquid suspension characteristics belongs to the field of vibration control. It successfully solves the problem that the existing particle collision damper cannot be applied to low-frequency vibration and weightless environment, and the active control effect is insufficient. The damper includes a sphere (1), a magnetic liquid (2), a lower magnetic field source (3), a shell (4), a left electromagnet (5), an upper magnetic field source (6) and a right electromagnet (7). When the external vibration occurs, the sphere (1) moves and collides in the shell (4), generating fluid viscous damping and collision damping to absorb energy. In addition, the left electromagnet (5) and the right electromagnet (7) can alternately excite the magnetic liquid (2) in the shell (4) according to the vibration condition, change the suspension force of the magnetic liquid (2), improve the response speed of the sphere (1) to the vibration, and achieve active control of the vibration.

The utility model discloses a hydraulic self-rotating micro-vortex flocculation reactor which comprises a plurality of self-rotating micro-vortex flocculation rings and a frame, self-rotating micro-vortex flocculation rings which are perpendicular to each other are sequentially arranged from top to bottom, vortex directions of at least two self-rotating micro-vortex flocculation rings are generated by utilizing power of water flow in the vertical direction from top to bottom, the water flow generates micro vortexes, the particle collision probability is increased, and floc formation is accelerated. The problems of single vortex direction and blind area are solved, the flocculation efficiency is remarkably improved through rotation and vortex, the reaction time is shortened, and the energy consumption is reduced.

Particle collision damper based on magnetic liquid suspension characteristics belongs to the field of vibration control. It successfully solves the problem that the existing particle collision damper cannot be applied to low-frequency vibration and weightless environment. The damper comprises a ball (1), a magnetic liquid (2), a bottom magnetic source (3), a shell (4), a side magnetic source (5), a top magnetic source (6), a side magnetic source (7), a ball shell (8) and a filling material (9). When the external vibration occurs, the ball (1) moves and collides in the shell (4), generating fluid viscous damping and collision damping to absorb energy and achieve the purpose of vibration reduction.