18 results about "Particle collision" patented technology

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 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 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.

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.

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).

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.

The application provides a method and system for predicting particle settling, collision and flow characteristics in a pump, comprising: constructing a multi-phase flow training sample library of real-time collected environment and virtual-real fusion; after pre-processing the sample library data, using a double-flow deep neural network architecture to extract multiple source feature vectors in parallel; cross-fusing the multiple source feature vectors to obtain a multi-modal fusion feature vector, and establishing an Euler-Lagrange two-way coupled partial differential control equation; inputting the multi-modal fusion feature vector into a physical information neural network based on a gradient-aware adaptive physical loss function, and outputting particle instantaneous settling velocity, particle collision contact force, local entropy production rate and global reconstructed three-dimensional flow field; based on the output calculation index, hierarchical regulation is executed accordingly. The application breaks the feature mismatch problem, replaces the complex grid iteration with millisecond-level forward reasoning conforming to the conservation law of fluid mechanics, and realizes high-precision intelligent online prediction of complex flow field characteristics.

The invention provides a GIS particle collision diagnosis method based on sound-vibration-voltage-ultrahigh frequency fusion, and relates to the technical field of power equipment state monitoring and fault diagnosis. The method comprises the following steps: firstly, acquiring ultrasonic, vibration and voltage signals and partial discharge ultrahigh-frequency signals of GIS equipment, and carrying out de-noising and anti-interference processing; further obtaining an ultrasonic signal characteristic value, a vibration signal characteristic value, a voltage signal characteristic value and a partial discharge ultrahigh frequency signal characteristic value, and performing characteristic value fitting to obtain a fitting function; and finally, according to the fitting function, calculating a fitting value of real-time GIS equipment data to be diagnosed under a corresponding voltage grade, determining basic fault judgment thresholds under different voltage grades, further judging whether particle collision faults exist in the GIS equipment, and further performing basic fault judgment and fault grade division. According to the method, fault diagnosis from the perspective of multiple physical fields of mechanical-electrical-discharge is realized.

The invention discloses a particle weak collision acoustic detection system and method based on cyclic generalized correlation, and belongs to the field of acoustic detection. Comprising a vibration control module, a vibration table, a sound sensing module, a signal acquisition module, a cyclic correlation calculation module, a generalized weighting algorithm selection module, a peak detection and particle weak collision diagnosis module and a communication and power supply module. According to the particle weak collision acoustic detection system and method based on cyclic generalized correlation, redundant particles in power equipment are excited to vibrate, collide and produce sound, the cyclic generalized correlation algorithm and the peak value detection algorithm are matched to suppress environmental noise, and the peak value characteristics of weak sound signals are extracted; the micro particulate matter detection device can realize detection of micro particulate matters in the electronic equipment, has the advantages of being adaptive to various acoustic / vibration sensors, flexible in signal processing method, resistant to environmental noise interference, low in detection cost, capable of identifying the micro particulate matters and the like, and has important scientific research significance and engineering application value.