45 results about "Particle generation" patented technology

According to the mixed phase ice crystal particle ground generation and icing experiment device and method, a water spray head generates a water drop particle swarm, an ice crystal particle generation device generates an ice crystal particle swarm, the water drop particle swarm and the ice crystal particle swarm are mixed in a controllable proportion to form an ice-water mixed phase, and then a mixed phase icing experiment can be achieved. The experimental device comprises an air duct system, a water drop atomization generation system, an ice crystal particle generation system, an impact surface system and a measurement system, the air duct system comprises an axial flow fan, an air duct and an experiment cavity; the impact surface system comprises an impact surface assembly, the water drop atomization generation system and the ice crystal particle generation system are used for providing water drops and ice crystals respectively, the axial flow fan provides high-speed airflow, the water drops and the ice crystals are conveyed through the air duct to impact the impact surface assembly at a high speed, and an impact icing experiment of a mixed phase is achieved; the measuring system is used for measuring the air speed, temperature and humidity in the air duct and measuring the thickness and temperature of an ice layer of the impact surface assembly.

The utility model relates to an air purifying, disinfecting and cleaning system for an operating room, which comprises functional modules such as a first box body, a first purifying assembly, a second purifying assembly, a fan, a coil pipe assembly, a first active composite particle generating device and the like. And then the air subjected to primary treatment is subjected to secondary filtration, so that various pollutants such as particulate matters and harmful gases can be efficiently removed. And meanwhile, through precise temperature and humidity adjustment of the coil pipe assembly, it is ensured that outlet air meets the comfort requirement of the operating room. In addition, the first active composite particle generation device can release disinfection factors with strong oxidizing property, and air about to enter the pipeline is continuously sterilized. Meanwhile, intelligent technologies such as power-off emergency power supply and fault monitoring are integrated through the control unit, the anti-interference performance and reliability are greatly improved, and the energy utilization efficiency and economical efficiency are also remarkably improved.

The invention relates to the technical field of wafer storage and transportation, and particularly discloses a wafer storage and transportation box which comprises a first cover body and a second cover body. The first cover body and the second cover body are buckled to form an accommodating cavity for storing a wafer; the first cover body is provided with a plurality of limiting structural members which are arranged at intervals in the circumferential direction of the wafer. The limiting structural member is connected with the first cover body through a rotating assembly, and the rotating axis of the rotating assembly is parallel to the plane where the wafer is located; the second cover body is provided with a guide groove, the limiting structural part is provided with an insertion guide part on one side of the rotating axis, and the insertion guide part extends towards the direction of the guide groove. According to the wafer storage and transportation device, safe and reliable storage and transportation of wafers can be achieved, the wafers are prevented from moving and colliding in the transportation process, damage to the wafers and the risk of generating particles are reduced, and the safety of wafer storage and transportation is effectively improved.

The invention belongs to the technical field of cutting simulation, and particularly relates to a modeling and simulation method for a multi-scale particle reinforced composite material. Comprising the steps that a workpiece, a cutter and enhanced particle parameters are input, and the enhanced particle parameters comprise a plurality of scale intervals and particle proportions of all the intervals; the workpiece is divided into a particle area and a non-particle area, and the size and position of the particle area are controlled through cutting area factors; and sequentially generating reinforced particles meeting a mutual noninterference condition and an internal condition in the particle area according to a descending order of the scale intervals, building a cutting simulation model after the particles are generated, and implementing differentiated grid division on the particle area and the non-particle area. Through multi-scale interval division and space partitioning strategies, the problem of insufficient accuracy caused by single particle scale in an existing modeling method is solved, and the simulation efficiency is remarkably improved while the model accuracy is ensured.

A traceable calibration device of particle number (PN) analyzers for vehicle emission includes a particle generation system, used for generating different types of aerosol samples; a solenoid valve system, used for controlling various aerosol samples to quantitatively enter the particle growth system; a particle growth system, used for performing charge classification to obtain doubly-charged-particle aerosol samples, triply-charged-particle aerosol samples and monodisperse aerosol samples, and obtaining grown particle samples by controlling the growth speed of the monodisperse aerosol samples through temperature adjustment; and a particle measurement system, used for measuring electrical current and PN concentration of the grown particle samples. In the present disclosure, the problem of low calibration accuracy of a PN analyzer for vehicle emission in the related art is solved.

Provided is a method of producing a target material with reduced particle generation during sputtering, which is a method of producing a sputtering target material whose material is an alloy M, including a sintering step of sintering a mixed powder obtained by mixing a first powder and a second powder. A material of the first powder is an alloy M1 in which the proportion of a B content is from 40 at. % to 60 at. %. A material of the second powder is an alloy M2 in which the proportion of a B content is from 20 at. % to 35 at. %. The proportion of a B content in the mixed powder is from 33 at. % to 50 at. %. A metallographic structure including a (CoFe)2B phase and a (CoFe)B phase is formed in the sintering step. A boundary length per unit area Y (1 / μm), which is obtained by measuring a boundary length between the (CoFe)2B phase and the (CoFe)B phase using a scanning electron microscope, and a proportion X (at. %) of a B content of the alloy M satisfy the expressionY<−0.0015×(X−42.5)2+0.15.

The application discloses a popcorn raw material screening workshop air filtering system and device, and relates to the technical field of industrial dust removal. The system comprises a micro-mechanical property acquisition module, a flow field fluctuation monitoring module, an environment sensing and adhesion coupling module, a multi-physical field coupling calculation module and a self-adaptive dust cleaning execution module. The anti-breaking strength of raw materials is acquired to construct a crushing particle generation potential factor, and the transient concentration impact load is extracted in combination with the dust concentration time series. Meanwhile, the environmental humidity is introduced to establish a dust capillary adhesion index, so that the dynamic calculation of the dust net deposition mass change rate on the surface of the filter bag is realized. On this basis, the difference relationship between the real-time deposition state and the reference working condition is constructed, and the pulse dust cleaning trigger pressure difference threshold is dynamically adjusted, so that the self-adaptive control of the dust removal system is realized. The application can effectively improve the dust treatment efficiency, reduce the energy consumption, prolong the service life of the filter bag, and is suitable for popcorn raw material screening and other industrial scenes with obvious dust concentration fluctuation.

Provided are a method for estimating a flow rate distribution of an injected material, a method for estimating a temperature distribution of an object, a method for designing a spray nozzle, and a method for creating a learned model, which are capable of accurately estimating a flow rate distribution of an injected material injected from a spray nozzle on an injection surface while using a particle method having a track record as a numerical simulation method even for a gas-liquid multiphase fluid.SOLUTION: An inflow particle arrangement interval d ' obtained from a filling rate α of the liquid phase and an initial inter-particle distance d is defined as a particle interval in the particle inflow region, a function of a probability that particles are generated in the particle inflow region is defined as a particle generation rate function P, and coordinates of the injected material in the particle inflow region are represented by the inflow particle arrangement interval d ' and the particle generation rate function P, the particle generation rate function P is calculated in advance by using a flow rate distribution on a test ejection surface measured in advance by using a test spray nozzle having the same shape as the spray nozzle.SELECTED DRAWING: Figure 1

This invention discloses a method and system for point cloud representation that integrates sphere-based and curve-guided methods. The method includes: acquiring raw point cloud data; dividing the raw point cloud data into spheres and sampling boundary points for each generated sphere to obtain sphere boundary sampling points; performing multiple downsampling operations on the sphere boundary sampling points; performing point cloud weaving on the compressed point cloud data at each scale; extracting local point cloud features and curve features from the compressed point cloud data and weaving lines at each scale; and then fusing the local and curve features at each scale to obtain point-line fused features at different scales, forming multi-scale point cloud features. This invention's method can achieve lightweight, high-precision, and high-efficiency 3D point cloud representation while maintaining the integrity of the point cloud's geometric structure.

This application discloses a periscope motor, a camera module, and an electronic device. By providing a first groove and a roller fixed to the first groove on the side surface of the base, and a second groove corresponding to the first groove on the side surface of the mounting base, the roller on the side surface restricts the vertical movement of the mounting base. This reduces the probability of the mounting base impacting adjacent structures upwards or downwards, thereby reducing the risk of particle generation and the probability of dents forming on the base. Furthermore, it reduces the probability of shadows, black spots, or poor focus during imaging.

The invention belongs to the technical field of additive manufacturing, and provides an intelligent wind field wind speed control method and device for additive manufacturing, and the intelligent wind field wind speed control method for additive manufacturing comprises the following steps: S1, data collection; s2, data processing; s3, making a control decision; s4, adjusting is executed; s5, closed-loop feedback is carried out; according to the method, a wind field is accurately adjusted in real time, and the workpiece defect rate is remarkably reduced: through dual-data acquisition of a 3D visual detection camera and a pipeline type wind speed sensor, an adjusting instruction can be generated at the moment when high-risk splashing particles are generated in combination with an SLM exclusive fusion model with response delay smaller than 1 ms; the frequency converter and the air volume control valve driven by the PLC are matched, so that the air speed can be adjusted within 100ms, and the risk of keyhole collapse is effectively eliminated; wind field adjustment is intelligent, and the labor cost is greatly reduced; zoned wind control and energy conservation are realized, and the service life of the field lens is prolonged.

It controls relatively large flow rates while maintaining high control accuracy in the low flow rate range, ensuring stable control accuracy from small to large flow rates. It prevents adverse effects from particle generation, ensuring high reliability and long lifespan. [Solution] The device includes a ring-shaped leaf spring member 5 whose inner circumference 5c is relatively displaceable in the axial direction Fs. The outer circumference 5f of the leaf spring member 5 is fixed to the housing 2h by arranging the leaf spring member 5 coaxially with respect to the solenoid part 2, and the inner circumference 5c of the leaf spring member 5 is fixed to the movable part 3.

Provided are a mask system for inhibiting aerosol escape based on negative electric particles and a use method therefor. The mask system comprises a mask and a negative electric particle generation apparatus. The mask comprises a mouth mask body, which comprises a mouth negative electric particle interface. The mouth negative electric particle interface is connected to the negative electric particle generation apparatus. The negative electric particle generation apparatus comprises a circuit board and a negative electric particle releasing plate. The negative electric particle releasing plate forms a plurality of discharge bodies, and the circuit board is connected to the negative electric particle releasing plate, such that the discharge bodies generate negative electric particles. Negative electric particles generated by the negative electric particle generation apparatus can be introduced into the mouth mask body via the mouth negative electric particle interface to promote the settlement of aerosol in the mask.

The invention discloses a method and device for controlling a particle laying path and a related product. And generating particles on the paving line according to the particle parameters. The presence time of the particle is counted from the time at which the particle is generated, and the display radius of the particle, which becomes smaller as the presence time increases, is calculated in real time on the basis of the particle parameter and the presence time. When the display radius is smaller than the preset value, the particles are controlled to be dissipated from the paving line, and the problems that the calculation amount is too large and a central processing unit operates for a long time with high load due to unlimited increase of the particle number are solved. According to the particle dissipation mechanism, the calculation amount can be reduced, the stability of the central processing unit is improved, and the stability of the reality head-up display system is enhanced. Therefore, guidance can be provided for the driver continuously and reliably, traffic dangers caused by wrong guidance are avoided, and the driving safety is effectively improved.

A high-quality decontamination fluid is supplied to the area to be decontaminated at a sufficient flow rate. [Solution] A decontamination fluid supply device that supplies decontamination fluid to a space to be decontaminated includes a particle generation unit that atomizes the decontamination liquid to produce fine particles for decontamination. The particle generation unit is located at the bottom of the case and has a plurality of spray nozzles that atomize the decontamination liquid using pressurized gas to produce fine particles of the decontamination liquid. The case is provided with a plurality of pressurized gas supply ports for supplying pressurized gas to each of the plurality of spray nozzles. Each spray nozzle includes a pressurized gas discharge path having a pressurized gas discharge port for discharging pressurized gas, and a liquid discharge path having a liquid discharge port for discharging the decontamination liquid stored at the bottom of the case. The negative pressure created by discharging pressurized gas from the pressurized gas discharge port draws the stored decontamination liquid through the liquid discharge path to the liquid discharge port, where it is atomized when it merges with the pressurized gas discharged from the pressurized gas discharge port.

The application belongs to the technical field of ice particle jet, and particularly relates to a device and a jet method for preparing straight-rotation mixed ice particle jet by using high-pressure superheated liquid flash evaporation, which comprises a high-pressure superheated liquid supply system and a water supply system, the high-pressure superheated liquid supply system and the water supply system are respectively connected with a straight-rotation mixed ice particle generation jet, the straight-rotation mixed ice particle generation jet system is connected with a recovery system, the recovery system is connected with the high-pressure superheated liquid supply system through a pipeline, the straight-rotation mixed ice particle generation jet system comprises a double-layer sleeve, the inner layer of the double-layer sleeve is connected with the water supply system, the outer layer is connected with the high-pressure superheated liquid supply system, an impeller is arranged at the outlet of the double-layer sleeve, a convergent atomizing nozzle is arranged at the outlet of the impeller, a protective shell is arranged outside the convergent atomizing nozzle, the convergent atomizing nozzle and the impeller center line are coincided with the inner layer, and the superheated liquid flash evaporation in the application has high refrigeration power and high speed, and can complete ice particle preparation in a short time.

To provide a method of forming a protective film for suppressing generation of particles, and to provide the protective film and a substrate processing apparatus.SOLUTION: A film forming method of forming a protective film on a surface of a member in a processing chamber in a plasma processing apparatus, the method including supplying a processing gas including a first silicon-containing gas that does not include hydrogen and fluorine and includes silicon and a first oxygen-containing gas including oxygen into the processing chamber, supplying a high frequency power for generating plasma to an upper electrode, and forming a silicon oxide film on the surface of the member by plasma generated from the processing gas including the first silicon-containing gas and the first oxygen-containing gas.SELECTED DRAWING: Figure 2

Electromagnetic device (1) for magnetic particle imaging, comprising the following: - a return yoke (2) with a gap extending in the Y direction and forming a magnetic field space, where the width direction of the magnetic field space is defined as the X direction and the length direction of the magnetic field space is defined as the Y direction; - a gradient magnetic field generation unit (3) formed on the feedback yoke (2) and configured to generate - in the magnetic field space - a gradient magnetic field (HX1) in the X direction and to form - in the magnetic field space - a zero-field region (S1) extending in the Y direction; - an alternating magnetic field generation unit (4) formed on the feedback yoke (2) and configured to generate an alternating magnetic field (HX2) in the magnetic field space; and - a rotation mechanism configured to rotate - when the direction perpendicular to the X-direction and the Y-direction is defined as the Z-direction - the gradient magnetic field (HX1) and the alternating magnetic field (HX2) relative to the subject (6), wherein the Z-direction is the rotation axis (CZ), and wherein the feedback yoke (2) has the following: - an alternating magnetic field yoke (22) configured to correspond to the alternating magnetic field (HX2) and extending in the Y direction; and - a pair of gradient magnetic field yokes (21, 23, 24, 25, 26) which are designed to correspond to the gradient magnetic field (HX1) and which are arranged on the inside of the alternating magnetic field yoke (22) and run in the Y direction so that they are opposite each other.

[Problem] The present invention provides: an apparatus for producing fine particles, with which the mass productivity and production efficiency stability of fine particles are improved; a method for producing fine particles; a cell for fine particle generation; and a method for producing a cell for fine particle generation. [Solution] Disclosed is an apparatus 1 for producing fine particles, with which fine particles are produced by irradiating a solution 7 (a precursor solution 71), in which a precursor that contains a metal atom is mixed, with a femtosecond pulse laser 30a. The apparatus 1 for producing fine particles is characterized by being provided with: a cell 2 for fine particle generation, which is extended in the flow direction f of the solution 7; and an irradiation unit 3 which irradiates the solution 7 flowing in the cell 2 for fine particle generation with the femtosecond pulse laser 30a along the flow direction f. The cell 2 for fine particle generation may have: a first storage unit; a partition wall where an outflow hole through which the solution 7 flows out from the first storage unit and the femtosecond pulse laser 30a is condensed by the irradiation unit 3 is bored; and a second storage unit which stores the solution 7 that has flowed out from the first storage unit through the outflow hole.

The utility model relates to the field of nasal cavity cleaning equipment, in particular to an electric nasal cavity atomization flusher which comprises a shell, a tank body, an atomization sheet and a liquid guide column, liquid for cleaning the nasal cavity is contained in the tank body, the top of the tank body is open, the shell is connected to the upper portion of the tank body in a sleeved mode, a mist outlet is formed in the shell, and the atomization sheet is arranged at the mist outlet. One end of the liquid guide column is immersed in the liquid, the other end of the liquid guide column is connected with the atomization piece, the liquid is guided to the atomization piece, and atomization holes are formed in the atomization piece; the ultrasonic generating device is connected with the atomizing sheet, drives the atomizing sheet to vibrate and enables liquid to pass through the atomizing holes to generate atomized particles. Atomized particles are generated through ultrasonic vibration, a common pressure type atomized particle generation mode is replaced, the spraying speed does not depend on external environment changes, mist output is stable, mist spraying is uniform, the flushing process is soft and comfortable, impact stimulation in the atomization process is reduced, and the ultrasonic atomization device is more suitable for infants and sick children with low matching degree.

A dry type hole filling technology comprises the following steps that S1, a substrate is cleaned, specifically, the substrate to be subjected to hole filling is put into a plasma cleaning machine to be subjected to plasma cleaning, and then the surface of the substrate is covered with a low-temperature decomposition polymer layer; s2, substrate preheating is conducted, specifically, a preset temperature curve is set to conduct preheating on the substrate, and a high-voltage pulse heating mode is adopted; s3, nano-particle generation, wherein nano-particles are continuously generated through a nano-generation device; s4, vacuum environment deposition: depositing the nano metal particles generated in the step S3 into the to-be-filled holes of the substrate; s5, ultrasonic-assisted dispersion and sintering: applying ultrasonic waves to the region to be subjected to hole filling through an ultrasonic device while or after the step S4 is carried out, so that the nano metal particles in the holes are uniformly dispersed; the nanometer metal particles are sintered in a high-voltage pulse heating mode; and S6, redundant particles are removed, and hole filling low-temperature decomposition polymer layer gasification is completed to take away surface residual particles.

A pellicle frame having a pair of frame members is disclosed. Each of the frame members is formed in a shape corresponding to a support portion of the pellicle. The frame members are coupled to each other with their plate surfaces overlapping to form a two-layer structure. Recessed portions are formed on mutually corresponding regions of opposing inner surfaces of the frame member. These recessed portions form vent holes that open laterally from the plate surface when the frame members are coupled. A filter is inserted in each vent hole. This configuration facilitates easy cleaning and inspection of the pellicle frame and minimizes particle generation during processing of the filter material. Additionally, it provides an effect sufficient to protect the film from pressure variations within the interior space of the pellicle frame, thereby preventing damage to the film.

This invention relates to the field of sulfur recovery and resource utilization technology, specifically to a pretreatment process to prevent fine particles from underwater wet sulfur molding from entering downstream systems. The process includes the following steps: Step 1: Source control and particle reduction (molding stage). S1.1 Optimize the molding nozzle: Replace the traditional straight-channel nozzle with a tapered spiral channel nozzle. The channel inner diameter gradually decreases from 10mm at the inlet to 5mm at the outlet, with a spiral angle of 15~20°, reducing the droplet breakage rate during molten sulfur injection. This invention, through a three-stage interception system, increases the fine particle interception rate to over 99%, reduces the frequency of downstream system pipeline blockage to ≤1 time / month, doubles the pump replacement cycle, and stabilizes the heat exchanger efficiency at ≥90%. Optimizing the molding nozzle channel and cooling water vortex field design reduces the fine particle generation from ≥8% to ≤2%, fundamentally reducing the escape rate of fine particles.

The invention provides a shaped charge jet simulation method based on AMRM-FEM-SPH, and the method comprises the steps: employing an AMRM adaptive grid method to dynamically adjust the node position of a grid in a shaped charge cover crushing forming stage, and avoiding the grid distortion to guarantee the jet forming precision; in the jet stretching and penetration stage, the process is simulated through a finite element and smoothed particle fluid dynamics coupling method; and when the jet flow unit and the target plate unit reach a critical failure criterion, the failure unit is converted into smooth particles. According to the method, an AMRM adaptive grid technology is combined with an FEM-SPH multi-algorithm coupling mechanism, so that the inherent defects of calculation distortion and unit deletion of a traditional finite element in a high-distortion region are overcome, and the bottleneck of numerical dissipation of a pure fluid method and insufficient particle generation in FEM-SPH coupling is avoided; high-precision simulation of the whole process of energy-gathered jet flow forming, stretching, fracture and penetration is achieved, the accuracy of jet flow penetration performance simulation is remarkably improved, and reliable numerical support is provided for energy-gathered jet flow analysis and structure optimization.

The application discloses a kind of full-view image metering live oil solid deposition test methods in the field of crude oil solid deposition, step 1, image pre-processing;Step 2, image detection and identification;Step 3, man-machine interaction;Compared with prior art, the beneficial effects of the present application are that the image metering and particle size test of the whole process of solid phase particle generation and growth in the process of crude oil high pressure physical property test are solved, the traditional solid deposition can only be qualitatively analyzed, the quantitative analysis of the whole process and full scale of solid deposition particles is achieved, the image metering and particle size test of the whole process of solid phase particle generation and growth in the process of crude oil high pressure physical property test are solved, the traditional solid deposition can only be qualitatively analyzed, the quantitative analysis of the whole process and full scale of solid deposition particles is achieved;The geometric properties of solid phase can be greatly reduced by using computer vision technology to automatically and quantitatively analyze the solid phase, and the work efficiency is improved.

A liquid supply device that reduces particle generation includes a pump configured to supply a liquid to a nozzle within a wafer processing chamber, a controller configured to control the pump, and a main power source configured to supply electrical power to the pump. The pump includes a stator, a coil surrounding the stator, a case having an internal space, and an impeller within the case internal space. The impeller is rotated by a magnetic force generated by the stator and the coil. When the electrical power is shut off from the main power source to the coil, the controller is configured to reduce a rotational speed of the impeller and stop the pump.

The invention provides an indoor space airflow direction control method and system, and the method comprises the steps: arranging an air inlet side which is used for enabling external clean air to enter an indoor space on one side of the horizontal direction of the indoor space, and arranging an air outlet side which is used for discharging the air in the indoor space on the other side, which is horizontally opposite to the side, of the indoor space, the air flow in the indoor space is controlled to flow from the air inlet side to the air outlet side. An existing method that airflow vertically flows from top to bottom in a semiconductor manufacturing plant is changed, transverse and uniform flowing of the airflow can be controlled, it is guaranteed that no nanoscale particles exist on the upstream of a production line, any possibility of particle generation is avoided, and compared with an existing high-wind-speed vertical mode, energy is saved by two times by entering a room at a low wind speed, and the production efficiency is improved. And the working environment of an operator is greatly improved.

A high-quality decontamination fluid is supplied to the area to be decontaminated at a sufficient flow rate. [Solution] A decontamination fluid supply device that supplies decontamination fluid to a space to be decontaminated is The system includes a particle generation unit that atomizes the decontamination liquid to produce fine particles for decontamination. The particle generation unit is located at the bottom of the case and has multiple spray nozzles that atomize the decontamination liquid using pressurized gas to produce fine particles of the decontamination liquid. The case is provided with multiple pressurized gas supply ports for supplying pressurized gas to each of the multiple spray nozzles. Each spray nozzle has a pressurized gas discharge path with a pressurized gas discharge port for discharging pressurized gas and a liquid discharge path with a liquid discharge port for discharging the decontamination liquid stored at the bottom of the case. The negative pressure created by discharging pressurized gas from the pressurized gas discharge port draws the stored decontamination liquid through the liquid discharge path to the liquid discharge port, where it is atomized when it merges with the pressurized gas discharged from the pressurized gas discharge port.

The invention provides an asphalt pavement microparticle generation simulation method based on molecular dynamics, belongs to the technical field of road traffic environments, and solves the problems that the interaction behavior of a tire and an asphalt pavement cannot be analyzed from the molecular level and a micromechanism generated by microparticles in the friction process cannot be revealed in the prior art. By means of a molecular dynamics simulation method, firstly, a modified asphalt molecule, tire rubber molecule and aggregate base model is built, and after the reasonability is verified, a three-layer interface contact model is built; after energy optimization, friction simulation is carried out through a Confined Shear task under a set working condition, and a micromechanism generated by microparticles is systematically revealed by analyzing conditions such as system energy change, atom motion trail and chemical bond fracture. The method breaks through the limitation of a traditional macroscopic test, reveals a microparticle generation mechanism from a microcosmic angle, and provides a theoretical basis for developing environment-friendly low-wear asphalt pavement materials and tires and controlling pavement microplastic pollution from the source.