135 results about "Plasma flow" patented technology

The invention provides a system for preparing a single-walled carbon nanotube based on a pulsed plasma arc, which can improve the yield of the single-walled carbon nanotube. Two electrode module groups are arranged in an electric arc reaction cavity and are respectively used as an anode and a cathode, and a pulse power supply drives a motor module group to generate a pulse plasma electric arc; a pulse plasma arc is used as a heat source, a mixed solution of a catalyst and a catalyst auxiliary agent is atomized and then is fed into an arc reaction cavity by using carrier gas to react with a gaseous carbon source which is independently fed, and a high-purity single-walled carbon nanotube is grown on the surface of the fine catalyst through plasma flow between a cathode and an anode and a cracked carbon source, so that the high-purity single-walled carbon nanotube is obtained. And a produced product is obtained in a collection chamber at the tail end of the system. Meanwhile, the invention also discloses a method for preparing the single-walled carbon nanotube based on the pulse plasma arc.

An example method includes directing gas, via one or more first valves, from within an inner electrode to an acceleration region between the inner electrode and an outer electrode that substantially surrounds the inner electrode, directing gas, via two or more second valves, from outside the outer electrode to the acceleration region, and applying, via a power supply, a voltage between the inner electrode and the outer electrode, thereby converting at least a portion of the directed gas into a plasma having a substantially annular cross section, the plasma flowing axially within the acceleration region toward a first end of the inner electrode and a first end of the outer electrode and, thereafter, establishing a Z-pinch plasma that flows between the first end of the outer electrode and the first end of the inner electrode. Related plasma confinement systems and methods are also disclosed herein.

The invention discloses a device for converting biomass tar by coupling plasma multi-mode with a catalyst. A plasma reactor of the device comprises a coaxial DBD body discharge structure and a structural catalyst channel internal discharge structure; the alternating-current high-voltage electrode bar, the dielectric tube and the ground electrode form coaxial DBD body discharge in an inner cavity of the dielectric tube; catalyst particles in the inner cavity of the medium tube and the structural catalyst form voltage difference at the upper end and the lower end of the structural catalyst under the combined action of an alternating-current electric field and a direct-current electric field to form discharge in a structural catalyst channel; and meanwhile, gas which flows upwards from the structural catalyst and is activated by the plasma enables catalyst particles to be in a fluidized state, and interaction between the catalyst and the plasma is realized by combining coaxial DBD discharge. The whole reaction efficiency is improved by combining direct-current and alternating-current dual-power-supply driving and fluidized bed and packed bed two-mode coupling catalysts, rapid and efficient tar treatment can be achieved, and operability and economical efficiency of the tar treatment process are improved.

An alloy wheel is formed having a three dimensional configuration defining a face and recessed surfaces. The face of the wheel is machined providing a smooth surface at the face and defining an edge between the smooth surface of the face and the recessed surfaces. A nozzle element for projecting a plasma jet toward the wheel is provided. The plasma jet is projected toward the smooth surface of the face, the edge, and toward at least a portion of the recessed surfaces forming an alloy oxide at least on the face and the edge disposed between the face and the recessed surfaces. A first polymeric coating is applied over the face, the recessed surfaces and the edge disposed between the face and the recessed surfaces.

The utility model provides a detachable combined type plasma filtering card shell, which comprises a card shell, the card shell comprises an upper cover and a bottom shell clamped with the upper cover, the bottom shell is internally provided with a test paper card slot, and the upper cover is provided with a first sample adding hole facing the test paper card slot; the plasma separator is clamped on the upper cover, and the plasma separator comprises a supporting plate, a liquid storage cavity and a second sample adding hole, and the liquid storage cavity and the second sample adding hole are formed in the supporting plate. According to the detachable combined type plasma filtering clamping shell provided by the utility model, the plasma separator is clamped on the clamping shell, whole blood is added into the second sample adding hole, and then the pressurizing cover is bent to block the second sample adding hole, so that the filtering speed of the whole blood on the filter membrane is accelerated; the filtered plasma flows into the first sample adding hole from the liquid storage cavity to react with the test paper strip on the test paper clamping groove, so that the detection accuracy is improved, and further, the plasma separator and the clamping shell can be separated and independently used.

Volumetrically oscillating plasma flows, the volume of which controllably expands and contracts with time, are disclosed. Volumetrically oscillating plasma flows are generated by providing an energy with a power density that changes with time to the plasma-generating gas to form a plasma flow. The changes in the energy power density result in plasma flow volumetric oscillations. Volumetric oscillations with a frequency of above 20,000 Hz results in ultrasonic acoustic waves, which are known to be beneficial for various medical applications. System for providing volumetrically oscillating plasma flows and a variety of surgical non-surgical applications of such flows are also disclosed.

The invention discloses a polymer hollow-core optical fiber for an integrated SF6 gas sensor and a preparation method thereof, which are characterized in that a plasma generator is butted with a polymer capillary tube, and the tail end of the polymer capillary tube is connected with an air extractor, so that a plasma flow is in contact with the inner surface of the whole polymer capillary tube to generate an activation effect; and then depositing metal and a dielectric film in the capillary tube through a liquid phase deposition method to obtain the flexible and low-loss intermediate infrared polymer hollow-core optical fiber. The optical fiber is used as a gas chamber and a laser transmission channel, and an integrated SF6 gas sensor can be constructed through spiral integration. Compared with the prior art, the plasma processing method can activate the inner surface of a long and thin polymer capillary tube, improve the quality and interface bonding force of a liquid phase deposition metal / dielectric film, and further construct the polymer / metal / dielectric intermediate infrared hollow-core optical fiber through a liquid phase deposition method. The obtained polymer hollow-core optical fiber has the advantages of low loss, flexibility and high stability, and is suitable for constructing a high-sensitivity integrated SF6 gas sensor.

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.

The present invention discloses a method and device for analyzing cells in whole blood stock solution, belonging to the field of cell analysis. The whole blood stock solution is injected into an offset groove of a microfluidic chip; when the cells move, they encounter an obstacle column, and due to the flow resistance between the cells and the obstacle column, the cells migrate to a preset position in the offset groove; the target cells enter a focusing groove through a first filtering hole in a cell filter plate, and the plasma enters the focusing groove through a second filtering hole, and the plasma is located on both sides of the target cells; the remaining part continues to move along the offset groove and flows out from a first liquid outlet; the plasma pushes the target cells to move along the focusing groove to form a single-cell flow; the single-cell flow is optically detected; the detected target cells and plasma flow out from a second liquid outlet. Through the above steps, no additional reagents are used during the formation of the single-cell flow, and the blood can be transfused back into the body after analysis; a pure physical structure is adopted during the formation of the single-cell flow, and problems such as background noise caused by ultrasonic focusing will not occur.

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 provides an intelligent plasma flow control device and method for incident shock wave boundary layer interference, and relates to the technical field of flow control. The device comprises a controller, a high-voltage pulse power supply, a flat plate, a plasma synthetic jet exciter, a first wall surface hot line module, a second wall surface hot line module, a shock wave generator, a truss and a support, and the plasma synthetic jet exciter, the first wall surface hot line module and the second wall surface hot line module are sequentially installed on the flat plate at intervals in the direction from upstream to downstream. The truss is vertically installed on the support, the shock wave generator is connected with the support, the upstream tail end of the shock wave generator is provided with a first dip angle structure, and the shock wave generator is located above the first wall surface hot wire module and the second wall surface hot wire module; the exciter is electrically connected with the high-voltage pulse power supply, and the controller is electrically connected with the high-voltage pulse power supply, the first wall surface hot wire module and the second wall surface hot wire module. The method has the advantages of better robustness and higher adaptability.

Provided are an atmospheric pressure plasma processing method and an atmospheric pressure plasma processing device with which a sample is processed in a short time, and the number of processing steps is reduced. In the method and device, the surface of a sample is subjected to plasma processing under atmospheric pressure by means of: a plasma generating device that generates plasma by supplying a pressurized inert gas in a rotating flow from a gas inlet portion 38 to an inner peripheral surface of a reaction cylindrical body 31, and supplying microwaves controlled to a predetermined electric power amount into a high-frequency resonance cavity 34; a substantially cross-shaped reaction container 5; a sample moving mechanism 7 that enables a sample SF to move relative to the plasma flow within the reaction container 5; and a control means 9 that controls a plasma generation state in accordance with the state of the sample.

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.

The present invention discloses a novel micro-cathode arc thruster and an acceleration method thereof, relating to the field of CubeSat propulsion. The micro-cathode arc thruster comprises a thruster, a trumpet-shaped accelerating electrode, and a power processing unit. The high-potential output end of the power processing unit is respectively connected to the anode of the thruster and the trumpet-shaped accelerating electrode, and the cathode of the thruster is connected to the low-potential output end of the power processing unit. The power processing unit is used to generate a transient high voltage between the anode and cathode of the thruster, forming a plasma flow ejected from the nozzle of the thruster. The trumpet-shaped accelerating electrode is arranged at the nozzle of the thruster and is used to accelerate the plasma flow. The present invention achieves acceleration of ions in the plasma flow ejected by the thruster without adding an additional power device.

The invention discloses a whole blood stock solution cell analysis method and a whole blood stock solution cell analysis device, and belongs to the field of cell analysis. The cells encounter the obstacle column in the moving process, and the cells migrate to the preset position in the offset groove through the flow resistance between the cells and the obstacle column; target cells enter the focusing groove through first filtering holes in the cell filtering plate, plasma enters the focusing groove through second filtering holes, and the plasma is located on the two sides of the target cells; the rest part continuously moves along the offset groove and flows out from the first liquid outlet; the plasma pushes the target cells to move and focus along the focusing groove to form single cell flow; performing optical detection on the single cell flow; the detected target cells and plasma flow out of the second liquid outlet, through the steps, no extra reagent is needed in the single cell flow forming process, and blood can be infused into the body again after being analyzed; a pure physical structure is adopted in the single cell flow forming process, and the problems of background noise and the like caused by ultrasonic focusing cannot be generated.

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 application discloses a transition measurement method based on a plasma probe, wherein the plasma probe is arranged at different positions of an undisturbed part of an aircraft surface; the probe arrangement position is subjected to simulation analysis of aerodynamic heat and a temperature field in a flight process, and a probe material is selected according to a simulation result; three-dimensional plasma flow field simulation results are obtained for typical states in a transition window interval of a flight profile; three-dimensional plasma flow field electron density data are extracted, and a range of the plasma probe is determined according to the three-dimensional plasma flow field electron density data; a probe circuit is designed, and a plasma probe measurement device is obtained; the plasma probe measurement device is used to obtain a measured current-voltage curve and a saturated ion current of the probe, and electron density data are calculated according to the measured current-voltage curve and the saturated ion current, that is, a transition measurement signal of the probe plasma in the flight test, and a step change time of the transition measurement signal is taken as a transition occurrence time of measurement; according to the measured transition occurrence time, combined with telemetry data of the flight test, a transition measurement result is obtained, and validity of the transition measurement result is confirmed.

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.

The present invention relates to a blood analysis device including: a membrane configured to separate plasma from blood, a channel into which the plasma separated by the membrane is introduced, an electrode part including electrodes configured to adjoin one surface of the channel and come into contact with the plasma flowing in the channel, and a channel cover configured to adjoin a surface opposite to one surface of the channel which is adjoined by the electrode part, in which when any one of the electrode part and the channel cover adjoins the membrane, a part of the membrane covers an upper portion of the electrode part or the channel cover.

The invention relates to a device (6) for providing a plasma, comprising at least one plasma generating part (8) with an inlet (46) and an outlet (47) for a gaseous fluid, a first flow channel (11) being provided in the plasma generating part (8), optionally a second flow channel (12) being provided concentrically thereto, the second flow channel surrounds the first flow channel (11) at least in sections, the first flow channel (11) being fluidically connected to a first connection (16) for a gaseous fluid in order to form a heated gas flow and / or a plasma flow, and the inlet (46) of the plasma generating means (8) being fluidically connected to a feed means (34) which can be used to accelerate the gaseous fluid.

The invention provides a plasma sheath electromagnetic scattering calculation method based on an equivalent reflectivity model, and relates to the technical field of electromagnetic simulation, and the method comprises the steps: sampling a plasma flow field, and obtaining the electromagnetic parameter data of plasma; based on the electromagnetic parameter data of the plasma, the equivalent reflectivity on the surface element is calculated through an analytical method, and an equivalent reflectivity model is constructed; calculating scattering characteristics of the plasma sheath by using an equivalent reflectivity model and an improved physical optical method to obtain a radar scattering sectional area; whether the radar scattering sectional area converges is judged, if not, the number of plasma sampling layers is increased, sampling is conducted again, if yes, the radar scattering sectional area serves as an electromagnetic scattering result, and electromagnetic scattering calculation of the plasma sheath is completed. The problems of high resource consumption and low speed of plasma sheath electromagnetic scattering calculation are solved.

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.

The application discloses a reduced graphene oxide loaded high-entropy oxide and a preparation method and application thereof, and relates to the technical field of high-entropy oxides. The preparation method comprises the following steps: ultrasonic treatment is conducted on graphene and metal salt respectively in respective solvents to obtain a metal salt solution and a graphene suspension; the metal salt solution is added into the graphene suspension, urea is added and stirred, and then the obtained mixed solution is pretreated to obtain a precursor powder; and the precursor powder is subjected to plasma flow treatment to obtain the reduced graphene oxide loaded high-entropy oxide. The high-entropy oxide obtained by using the preparation method has the advantages of polycrystal face scattering, excellent impedance matching and strong wave absorption loss capacity, and has a wide application prospect in the electromagnetic field of consumer electronics, new energy vehicles and military weapons.

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.

The utility model discloses a vacuum coating machine. The vacuum coating machine comprises a coating chamber, a plasma generating assembly, at least two groups of light detection probes, a spectrograph and a controller, the coating chamber is provided with a to-be-coated position and a coating conveying line in the first direction, and the coating conveying line passes through the to-be-coated position so as to convey a substrate to pass through the to-be-coated position and coat the surface of the substrate; the plasma generation assembly communicates with the coating chamber and is provided with a plasma flow channel facing the position to be coated in the second direction, and the plasma flow channel forms a coating area in the third direction at the position to be coated; the at least two groups of light detection probes are distributed at intervals along a third direction and are used for detecting mixed glow emitted by the plasma in the plasma flow channel; the spectrograph is optically connected to the optical detection probe and is used for obtaining spectral data according to the mixed glow; and the controller is electrically connected to the spectrograph and is used for receiving and processing the spectral data and obtaining the plasma composition proportion.

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.