42 results about "Plasma flow" patented technology

The invention provides a plasma flow field parameter inversion method and system based on a 1D-CNN, and relates to the technical field of electromagnetic inverse scattering, and the method comprises the steps: building a plasma flow field model of a hypersonic speed target, calculating the information of a scattered field under the action of electromagnetic waves through a current density convolution-time domain finite difference method, and calculating the information of the scattered field under the action of the electromagnetic waves; solving a far field electric field component according to a near-far field extrapolation formula; sample data of multiple groups of far-zone time domain electric field components are obtained by changing inversion parameters, and a data set is constructed after the sample data are preprocessed; training a pre-built 1D-CNN model according to the data set until a preset training condition is met, and obtaining a parameter inversion model; and performing inversion according to the parameter inversion model to obtain plasma flow field parameters of the hypersonic speed target.

The invention discloses an intelligent and smart jet plasma flow control device and method, and relates to the technical field of active flow control, the device comprises an aircraft surface, the aircraft surface is provided with jet holes in the Z direction, a dielectric barrier discharge exciter is arranged above the aircraft surface, and a corona exciter is arranged below the aircraft surface; the dielectric barrier discharge exciter comprises an insulating dielectric layer, the insulating dielectric layer is provided with a through hole in the Z direction, the through hole is the same as the jet hole in shape and size, a low-voltage electrode is tightly attached to the lower portion of the insulating dielectric layer, and a high-voltage electrode is tightly attached to the upper portion of the insulating dielectric layer; the corona exciter comprises a negative circular ring and a positive circular ring, a plurality of spray points are arranged at the top end of the negative circular ring, and an electrode net is arranged at the bottom of the positive circular ring. The device realizes three-dimensionally controllable jet flow in the direction, has the advantages of high mechanical efficiency, short response time, wide control frequency band and the like, and is flexible to control, exquisite and efficient in structural arrangement and high in practicability. Popularization and application are facilitated.

The invention relates to the technical field of 3D printing, and discloses a plasma-assisted thermoplastic resin wire 3D printing method and a printing nozzle. The free radicals and active functional groups on the surfaces of the molten thermoplastic resin wire and the heated printed layer are subjected to chemical reaction, and the interlaminar / interchannel polymer molecular chain entanglement effect is improved by heating the current printed layer and the adjacent printed layer (or printing channel); the nano / micron / millimeter modified filler is transmitted by plasma flow, so that the modified filler particles are embedded into the surface of the thermoplastic wire rod, and mechanical connection of the additional modified filler particles is formed between layers or between channels through the modified filler particles. According to the preparation method, through the synergistic effect of mechanical connection of additional modified filler particles, entanglement of polymer molecular chains and connection of interlayer chemical bonds, the interlayer and channel interface adhesion effect is enhanced, and the interlayer and channel bonding strength of a 3D printing product is improved.

This invention belongs to the field of plasma flow control technology for aircraft, specifically relating to an air-breathing plasma jet generator suitable for active flow control of aircraft. It is installed within an internal cavity of the aircraft, connected to an air intake and a nozzle. The air-breathing plasma jet generator generates orthogonal electric and magnetic fields. The electric field includes components in the direction of airflow and perpendicular to airflow. The magnetic field is used to confine electrons to gyroscopic motion and to ionize them through collisions with gas molecules. Furthermore, the magnetic field causes the ion current perpendicular to the airflow direction to generate an Ampere force in the direction of airflow under the influence of the magnetic field. This invention effectively solves the problem of exciter failure during high-speed flight by embedding the exciter entirely inside the aircraft and combining an innovative design of integrated excitation using magnetic fields, thermal energy, and acoustic waves, significantly improving the speed applicability range of plasma flow control technology.

The invention discloses a method for preparing a high-density aluminum oxide coating by using a suspension plasma spraying technology, and relates to the technical field of suspension plasma spraying, and the method comprises the following steps: 1, carrying out sand blasting treatment on an upper electrode plate; sequentially carrying out high-pressure washing, compressed air blow-drying and drying operations; 2, the upper electrode plate is placed in a sulfuric acid solution to be subjected to hard anodic oxidation treatment; 3, a dry ice sand blasting process is adopted for pretreating the hole periphery area of the surface of the steel plate; step 4, injecting the aluminum oxide suspension into high-energy plasma flame flow through plasma spraying equipment; the aluminum oxide particles in the suspension are rapidly molten in the flame flow, then collide with the surface of the upper electrode plate at a high speed along with the plasma flow, and are rapidly cooled and solidified to form a layer of high-compactness aluminum oxide coating on the surface of the upper electrode plate. By optimizing the coating preparation process and parameters, the compactness and corrosion resistance of the coating are improved, the service life of equipment parts is prolonged, and the cost of a production enterprise is reduced.

Plasma Jet Device The invention relates to a cold plasma jet device (1) comprising: - at least one gas supply inlet (2); - at least one tube (4) fluidically connected to the gas supply inlet and comprising at least one plasma outlet (5), the gas supply inlet and the plasma outlet defining a direction of gas and plasma flow; - at least one high-voltage electrode (6) outside the tube configured to generate an electric field in the tube; and - at least one electrically conductive element (7) having a floating electrical potential and extending axially inside the tube at least partially between the high-voltage electrode and the plasma outlet. Figure for the abstract: Fig. 3

A localized heating device includes a plasma deforming portion and a heating portion. The plasma deforming portion includes an inlet end having a circular hole, an outlet end having an elongated hole with a first length and a first width, and a channel smoothly connected with the circular hole and the elongated hole. The heating portion, disposed at the outlet end, includes two control covers spaced by a slot. The elongated hole and the slot being oppositely disposed with respect to the plasma deforming portion. A plasma flow provided by a plasma producing source being to enter the channel via the circular hole, then to flow through the elongated hole, and finally to reach the slot.

Apparatus and method for decontaminating both contaminated waters and sorbent filter media, either separately or simultaneously, in a single system. Contaminants in a liquid flowing through a reaction chamber are removed by first generating a plasma within the liquid in the chamber, with the contaminants being broken into smaller particles at the interfaces between the generated plasma and the liquid. The combined plasma-liquid solution is then passed through a solid filter, which captures the smaller contaminant particles to decontaminate the liquid. To decontaminate the filter media, plasma flows through the filter material without the presence of liquid, the plasma reacting with the filter material to remove contaminants previously adsorbed by the filter.

Systems, devices, and methods generating a plasma flow are disclosed. A method may include applying energy that alternates between being at a base level for a first duration and at a pulse level for a second duration according to a controlled pattern, generating a plasma flow having a directional axis, and discharging the plasma flow alternating between a base configuration and a pulse configuration according to the controlled pattern. The plasma flow in the base configuration may have (1) a first temperature at the outlet and (2) a first flow front that advances along the directional axis. The plasma flow in the pulse configuration may have (1) a second temperature at the outlet that is greater than the first temperature and (2) a second flow front that advances along the directional axis at a speed greater than the first flow front.

This invention provides a biocompatible β This invention relates to a method for composite modification of titanium alloy surfaces, belonging to the technical field of alloy modification methods. The invention includes applications in medical... β This invention involves introducing bioactive particles onto the surface of a titanium alloy substrate, performing friction stir processing (FSP) on the substrate to introduce bioactive particles and construct a gradient grain structure, and then subjecting the FSP-treated substrate to compressed plasma flow (CPF) treatment to achieve uniform distribution of bioactive particles and construct a topology with an average surface roughness of 3-6 μm suitable for cell growth. The invention precisely controls the amount of bioactive particles introduced and constructs a gradient grain structure through friction stir processing (FSP); simultaneously, compressed plasma flow (CPF) technology achieves uniform distribution of bioactive particles and an ideal surface roughness of 3-6 μm on the titanium alloy surface. Ultimately, this significantly improves the cell adhesion, proliferation capacity, and osteogenic properties of the material surface, solving the technical problem of low integration efficiency of traditional titanium alloy implants with human bone tissue.

This disclosure provides a plasma device, belonging to the field of semiconductor equipment technology. The plasma device includes: a dielectric cylinder; a first cover plate covering the upper part of the dielectric cylinder, forming a plasma generation space together with the dielectric cylinder; a coil disposed outside the dielectric cylinder; a housing located below the dielectric cylinder; a second cover plate connected to the lower part of the dielectric cylinder and covering the upper part of the housing, forming a workpiece processing space together with the housing; at least one acceleration module is disposed in the second cover plate; the acceleration module includes: an electrode, an insulating layer, and an electrode feeder, wherein the insulating layer covers the electrode, the electrode feeder is used to feed energy into the electrode to form an electric field, the electric field is used to adjust the horizontal velocity of ions in the plasma flowing from the plasma space to the workpiece processing space, thereby adjusting the horizontal velocity of free radicals in the plasma; a grid located below the acceleration module and above the workpiece processing space.

This invention relates to the field of circuit board depaneling technology, specifically an automated circuit board depaneling method and equipment, comprising the following steps: introducing nitrogen gas into a sealed processing chamber to maintain an oxygen concentration ≤100ppm and a humidity of 40~60%RH; using a multi-axis robotic arm to drive a composite milling cutter to cut the circuit board along a V-cut line, with the vibration amplitude of the cutting area monitored in real time as <5μm; simultaneously spraying argon-oxygen mixed plasma onto the cutting surface during the cutting process, with the argon-oxygen mixed plasma flow covering a temperature of 100~150℃; after depaneling, the burr height of the circuit board edge is ≤5μm, and the surface roughness Ra is ≤0.8μm. This invention achieves high quality and high efficiency in automated circuit board depaneling, meeting the stringent requirements of modern circuit board manufacturing for depaneling processes.

This invention discloses a bladeless air sterilization device based on plasma flow control, comprising an induced airflow array and a plasma sterilization array arranged sequentially along the airflow direction. The induced airflow array consists of several SDBD (Solid State Difference) units, and the plasma sterilization array consists of several DBD (Deep State Difference) units. Each SDBD unit includes an SDBD unit dielectric layer, within which an SDBD unit high-voltage electrode is embedded, and an SDBD unit grounding electrode is disposed outside the SDBD unit dielectric layer. Each DBD unit includes two DBD unit dielectric layers, within which a DBD unit grounding electrode and a DBD unit high-voltage electrode are respectively embedded. This bladeless air sterilization device uses an induced airflow array instead of a bladed device, simplifying the structure and reducing costs; the high-voltage electrode is embedded in the dielectric layer, increasing safety; and multi-stage sterilization improves the sterilization rate.

The invention belongs to the technical field of high-end manufacturing, and particularly relates to a short-process low-pressure plasma spraying device and method. According to the method, a high-energy laser beam is located at the front end of plasma flame flow on the surface of a workpiece and moves synchronously with a spray gun, texturing treatment and surface cleaning are achieved, and synchronous preheating of a base material spraying area is achieved through induction coils coaxially distributed at the tail end of the plasma flame flow. According to the method, the problems of pollution, oxidation, deformation, stress concentration, even coating cracking and the like caused by the pretreatment process and multiple times of heating of the base material can be reduced to the maximum extent, and the coating processing and preparing efficiency and the coating quality are remarkably improved.

The utility model discloses a graphite boat dry cleaning device based on remote plasma, which comprises a plasma excitation unit, a cleaning chamber, a vacuum unit, a gas collection chamber and a uniform gas regulation and control chamber, and the plasma excitation unit and the vacuum unit are both arranged on the outer side of the cleaning chamber; the plasma excitation unit is connected with the cleaning chamber through a plasma feed-in pipeline, a graphite boat to be cleaned is placed in the cleaning chamber, and plasma airflow excited by the plasma excitation unit flows into the cleaning chamber through the plasma feed-in pipeline; the bottom of the cleaning chamber is provided with a uniform gas regulation and control chamber, the end part of the uniform gas regulation and control chamber is provided with a gas collection chamber, the gas collection chamber is connected with a vacuum unit through a vacuum pipeline, and gas in the cleaning chamber flows through the uniform gas regulation and control chamber, the gas collection chamber and the vacuum unit and then is discharged. The graphite boat cleaning device has the advantages of being compact in structure, convenient to operate, high in plasma distribution uniformity, high in stability and the like, and the graphite boat cleaning quality is remarkably improved.

The invention relates to the technical field of cellular board processing, in particular to plasma processing and hot-pressing laminating equipment for a PP (polypropylene)-based composite cellular board, which sequentially comprises an unwinding component, a hot-pressing laminating component, a laminating component and a plasma processing component along the material advancing direction, and the unwinding component is used for releasing a UD glass fiber belt, glass fiber cloth and a PP film which form a panel; the first plasma processing part is used for activating the surfaces of the UD glass fiber belt and the glass fiber cloth to form a reinforcing material; the preheating component is used for preheating the activated reinforcing material and the PP film; and the laying part is used for laminating the reinforcing material and the PP film to form the panel prepreg. And the second-stage plasma treatment system adopts a spray gun array which is symmetrically arranged up and down in a staggered manner and of which the inclination angle can be independently adjusted, and is combined with a negative pressure suction groove which is cooperatively arranged with the spray guns, so that the plasma flow can penetrate through honeycomb hole grids from multiple angles and perform dead-corner-free activation on the inner wall, and meanwhile, pollutants are immediately pumped away by the negative pressure groove, so that secondary pollution is avoided.

A kinetic energy harvesting system includes an air intake accelerator. The air intake accelerator is formed as a funnel which receives an airflow. A plasma generator receives the airflow from the air intake accelerator and generates a plasma flow. An inductor current section generates electricity from the plasma flow. The sensor system further includes a plasma sensor. The plasma sensor senses a speed and temperature of the plasma flow. The inductor current section further includes multiple metal wires mounted in the plasma flow. The multiple metal wires generate induction electricity from the plasma flow.

A device for providing a plasma, comprising at least one plasma-generating element with one inlet and one outlet for a gaseous fluid, wherein a first flow channel is arranged in the plasma-generating element, optionally a second flow channel which is arranged concentrically thereto and surrounds the first flow channel at least in sections, is arranged, the first flow channel being fluidically connected to a first connection for a gaseous fluid for forming a heated gas flow and / or a plasma flow, and the inlet of the plasma-generating element being fluidically connected to a conveying element, with which the gaseous fluid can be accelerated.

The invention discloses a heat-proof material high-wall temperature heat flow measurement test device and method. The invention relates to a heat-proof material high-wall-temperature heat flow measurement test device, which comprises a test piece bearing unit, a high-frequency induction heating unit, a test section cabin body, a first heat measurement unit and a second heat measurement unit, the heat-proof material high-wall-temperature heat flow measurement test method comprises the following steps that S1, a high-frequency induction heating unit discharges, electromagnetic coupling heating is conducted on a gas medium, ionization is conducted to form plasmas, and the plasmas form stable plasma flow to be emitted to a test piece bearing unit; s2, continuing the step S1 until the surfaces of the two sides of the test piece reach radiant heat balance; and S3, the conduction heat flow qc of the side, located on the inner surface of the shell, of the test piece and the conduction heat flow qr of the side, located on the outer surface of the shell, of the test piece are measured, the total heat flow qt when the surfaces of the two sides of the test piece reach heat radiation balance is calculated, and qt = qc + qr. The heat-proof material high-wall temperature heat flow measurement test device and method have the advantages of being high in measurement accuracy and high in data collaboration.

The application discloses a multilayer gradient coating and a preparation method and application thereof, and the preparation method comprises the following steps: sequentially depositing a TiAlN primer layer, a TiAlSiN transition layer and a gradient TiAlN / TiSiN wear-resistant layer on the surface of a substrate by using a physical vapor deposition method, continuously bombarding the surface of the substrate by a plasma flow in the process, and forming the multilayer gradient coating after the deposition is completed. In the application, the surface of the substrate is continuously bombarded by the plasma flow when the multilayer gradient coating is prepared by using the conventional physical vapor deposition method, the atomic migration rate of the coating is improved, the atomic diffusion of the coating is promoted, the defects such as micropores and dislocations in the coating are reduced, the coating density is improved, the atomic mutual diffusion between the multilayer coating layers is promoted, the performance gradient interface is more gentle, and the interface stress concentration is further reduced. Therefore, the risk of interface peeling and layering is reduced from the root, the combination stability of the coating and the cutter substrate and the interlayer bonding strength are significantly improved, and structural support is provided for long-term service of the coating.

The invention provides an arc wind tunnel dynamic flow field plasma parameter microwave measurement device and method, the device comprises an arc wind tunnel, a microwave system, a vector analyzer and a data processing module, a transmitting antenna and a receiving antenna of the microwave system are coaxially and horizontally arranged on two sides of a plasma flow field, and a beam waist is accurately aligned with the center of the flow field. According to the method, static and dynamic S parameters are measured through system self-calibration and wide-frequency-band frequency sweeping, a net transmission coefficient is calculated, and the electron density and the collision frequency are synchronously obtained by combining a forward calculation model, a residual objective function, a genetic algorithm and a Levenberg-Marquardt combined inversion algorithm. According to the invention, non-contact measurement is adopted, and a time domain gating filtering technology is matched, so that the problems of clutter interference and equipment ablation are avoided, online real-time accurate measurement of plasma parameters is realized, and reliable data support is provided for research on related characteristics of aircrafts.

The invention relates to the technical field of microwave signal frequency measurement, and discloses a method and system for measuring microwave signal frequency in a microwave electric field, and the method comprises the steps: setting a plurality of sampling points at a broken line interface, collecting microwave signal parameters, and building a local time domain electric field; a local circulation modeling strategy is executed, the rotation degree of a local time domain electric field is calculated to identify the local circulation of the broken line interface, a local circulation model is established, an interface control preposition strategy is executed, whether the local circulation meets the requirement for controlling the plasma to flow from the front cavity to the rear cavity or not is judged, and winding modes of two magnetic coils are set; executing a magnetic coil winding evaluation strategy, calculating current used for adjusting local circulation to control plasma to flow from the front cavity to the rear cavity in the two winding modes, and calculating efficiency of the two winding modes; executing a circulation dissipation control strategy, measuring the local circulation of the broken line interface, calculating the current of the magnetic coil to control the dissipation of the local circulation, and improving the operation stability and safety of the plasma chamber.

Apparatuses, methods, and systems are disclosed for accelerated ergonomic collection of capillary blood (126) and plasma (128). An apparatus and system include a blood collector module (102) and a separably or integrally coupled plasma separator module (106). Actuating a slide latch (136) by a lengthwise sliding motion triggers one or more lancet rows to puncture rows of blood extraction slits in a collection site (120) and generates a first negative pressure that assists blood to flow through apertures of an anticoagulation hemodynamic patterning matrix. Decoupling the blood collector module (102) from the site causes dynamic regulation of a downstream separator flow path of the plasma separator module with one or more multilayer plasma separation units to a second negative pressure that limits force exerted on plasma flowing through a membrane in the plasma separation units. Methods for accelerated ergonomic collection of capillary blood and plasma are disclosed.

The application discloses a kind of hypersonic vehicle plasma density on-line diagnosis method, including the current of probe zero position acquisition is obtained to obtain the current of modified probe plasma acquisition;In the current of modified probe plasma acquisition, effective data is selected, and is divided into n sections;The I-V curve of each section data in n section data is obtained;According to I-V curve, electron temperature and saturated ion current are obtained, and then the electron density of n section data is obtained;Edge effect and collision effect correction are carried out to the electron density, and the plasma density of plasma flow field is obtained.The application also discloses a kind of hypersonic vehicle plasma density on-line diagnosis system, including power supply module, power conversion module, triangular wave conversion module, signal conditioning module, acquisition and frequency adjustment module, probe and data processing equipment.The application improves plasma measurement data processing efficiency and accuracy under real environment, and can be used to guide basic theory research, predict model correction and support reliable measurement and control communication research.

The invention relates to the field of semiconductors, in particular to a plasma light source and semiconductor equipment. The plasma light source comprises a laser module used for emitting one or more laser beams; the optical shaping module is used for shaping the one or more laser beams, so that the laser beams form a plurality of laser spots in the plasma container, and each laser spot is used for forming and maintaining a plasma core; the light source collection module is used for acquiring and outputting radiation light emitted by the plurality of plasma cores; the control module is used for acquiring an oscillation signal of a plasma flow field in the plasma container and adjusting the laser module and / or the optical shaping module when the oscillation signal reflects that the plasma flow field is not in a steady state so as to adjust the distance between the at least two plasma cores and / or the size of at least one plasma core; therefore, the plasma flow field is in a steady state. The stability of the output power of the plasma light source can be improved.

A control-surface-free aircraft based on plasma flow control belongs to the technical field of aircrafts and comprises an aerodynamic configuration used in cooperation with a plasma flow control technology and a plasma excitation system integrated on the aerodynamic configuration, and the aerodynamic configuration comprises a drag reduction surface and an effect surface. The plasma excitation system comprises a lift augmentation exciter, a drag reduction exciter and a control exciter, flow separation is restrained through the synergistic effect of the lift augmentation exciter and the profile-optimized airfoil profile so as to lift the lift force, and a flow separation area is regulated and controlled through the control exciter arranged on the aerodynamic profile trailing edge effect surface so as to achieve decoupling control over the lift force and the drag. According to the design, a traditional control surface and related movable parts can be omitted, gaps in the surface of an aircraft body and mechanical transmission mechanisms are remarkably reduced, the stealth performance is improved, meanwhile, the internal structure can be simplified, and the system complexity and the fault rate are reduced.

This invention provides a method and system for simulating the interaction between electric propulsion wall debris and plasma, comprising: a charge deposition module to simulate the charge deposition effect of plasma flow field on debris; an electron energy deposition module to simulate the collision and energy absorption effect of debris on electrons; and an ion collision module to simulate the collision effect of debris on ions. This invention provides a simulation model tool for numerical simulation of discharge disturbances caused by electric propulsion debris, applicable to the simulation of the motion process of debris from electric thruster wall materials in a plasma flow field. It provides clear formulaic support for the formation of discharge disturbances related to wall debris, laying the foundation for establishing discharge disturbance suppression strategies and providing simulation basis for the influence of electric thruster wall debris on the plasma flow field and the discharge disturbance induction process.

The invention provides a device and method for measuring wake electron density of a terahertz wave arc wind tunnel test model, and the device comprises an arc wind tunnel system, a terahertz transmitting module, a beam shaping module, a detection module, and a data processing and inversion module. The beam shaping module converts terahertz pulse signals into zero-order Bessel beams, and the detection module filters noise through confocal filtering. According to the method, a wake region plasma flow field is generated through an arc wind tunnel, and after wave beam conversion and filtering receiving, the data processing and inversion module inverts the electron density through the steps of phase dispersion model fitting, Abel inverse transformation and the like. Non-contact measurement is adopted, ablation particle interference is avoided, sub-millisecond magnitude spatial resolution measurement is achieved, measurement accuracy and reliability are improved, and reliable data support is provided for aircraft plasma sheath characteristic evaluation.

This invention provides a power module cleaning device, comprising: a base plate with vertically arranged electrode plates fixed at both ends; a vertical plate with a support plate fixedly arranged on it, the vertical plate being fixedly connected to the base plate; a transfer frame with grooves matching the power module; and a clamping assembly for forming a clamping position with the support plate to hold the power module. The beneficial effects of this invention are: by generating a horizontal plasma flow through the vertically arranged electrode plates, and by clamping the power module with the clamping assembly and then removing it from the transfer frame, the power module is better exposed to the plasma flow, thus improving the cleaning effect.