274 results about "Particle capture" patented technology

The present invention provides a device and methods of use thereof in microscale particle capturing and particle pairing. This invention provides particle patterning device, which mechanically traps individual particles within first chambers of capture units, transfer the particles to second chambers of opposing capture units, and traps a second type of particle in the same second chamber. The device and methods allow for high yield assaying of trapped cells, high yield fusion of trapped, paired cells, for controlled binding of particles to cells and for specific chemical reactions between particle interfaces and particle contents. The device and method provide means of identification of the particle population and a facile route to particle collection.

A centrifuge for separating blood components, and methods for controlling the centrifuge. The apparatus has a fluid separation chamber having a first frustro-conical segment and a second frustro-conical segment. The second segment has a taper such that particles are subjected to substantially equal and opposite centripetal and fluid flow forces. A camera observes fluid flow, and a controller controls the flow. White blood cells are selectively captured within the second segment and are periodically flushed out of the fluid separation chamber. The camera is used to determine the quantity of particles captured. A limited quantity of high density particles, such as red blood cells, may be captured within the first segment before capturing relatively low density particles, such as white blood cells, within the second segment.

An apparatus for separating a predetermined amount of magnetic particles in a fluid, including a fluid conveyance portion having at least a first flow channel for supplying a fluid containing the magnetic particles, a second flow channel for discharging the separated magnetic particles, and an intersection at which the first flow channel and the second flow channel intersect each other, a capture unit for capturing a predetermined amount of the magnetic particles in the fluid supplied from the first flow channel to the intersection when a magnetic field is applied to the intersection of the fluid conveyance portion, and a discharge unit for removing the magnetic field applied to the intersection to discharge the magnetic particles captured by the capture unit by way of a medium introduced into the second flow channel.

The invention provides a sensor for nano gold particles and a preparation method thereof. The end surface of a multi-core optical fiber is of a conical-platform structure; a total-reflection film is plated on the surface of the conical platform; the nano gold particles which are distributed regularly are fixed on the end surface of the optical fiber plated with the total-reflection film; exciting light is injected into one fiber core of the multi-core optical fiber, is reflected to the end surface of the optical fiber at the film-plated position of the conical platform and generates total internal reflection on the end surface of the optical fiber, and a generated evanescent field excites a localized surface plasmon resonance effect of the nano gold particles; the reflected light is collected by the fiber core symmetrical to the fiber core injected with the exciting light, and the change of the physical quantity of external substances is sensed by the spectrum of the reflecting light. The sensor and the preparation method have the advantages that the multi-core optical fiber, a self-assembly technology of a near-field optical tweezer and the localized surface plasmon resonance effect of the nano gold particles are combined, and the near-field optical tweezer of the multi-core optical fiber can be utilized for capturing the nano gold particles, so that the optical self-assembly and regular distribution is carried out on the nano gold particles according to the distribution rule of the capturing areas; the structure is simple, the volume is smaller and the repeatability is high.

The invention discloses an oil injection combustion-supporting regeneration temperature control method for a DPF diesel engine particle filter system. The method comprises the steps that a DPF system temperature numerical value is collected through a temperature sensor in real time and transmitted to an electronic control unit, the electronic control unit is used for working out the fuel injection amount needed for adjusting the current temperature of a DPF into a target temperature through an open loop control algorithm and a closed loop PID control algorithm according to the temperature numerical value and transforming the fuel injection amount into a corresponding pulse width signal to drive a fuel control valve, the accurate control over the current fuel injection amount of a DOC catalyst is achieved, the exhaust temperature of an engine is controlled, and thus the temperature of the DPF is controlled. According to the method, the amount of fuel injected by the fuel control valve is controlled through open loop control and closed loop control, the flexible variable control over the temperature of the DPF diesel engine particle filter system in the regeneration process is achieved, it can be ensured that smoke particles captured in the DPF are combusted, and the phenomenon that the regeneration temperature is out of control, and consequently the DPF diesel engine particle filter system is aged and damaged can be avoided.

A system and method comprising same for measuring and analyzing particles within a gas feed stream. In one aspect, the system comprises a particle counter and a particle capture filter that are arranged in parallel. In another aspect, the system comprises a purifying device to remove trace molecular impurities from a gas feed stream to reduce the presence of impurities.

Sintered fiber filters are provided that can afford high particle capture efficiency and/or low pressure drop during operation, and are useful in applications such as semiconductor processing. The shape of at least a portion of the individual fibers (e.g., metal fibers) used to make the filter have a three-dimensional aspect, which allows for a low packing density and high porosity filtration media. Certain filters have a cylindrical or tube-like shape with tapered ends of higher density. Methods of making such filters, for example, using axial pressing, are also described.

Disclosed is a method for the removal of soluble particulate matter from a gas stream, such as urea dust from the off-gas of a finishing section of a urea production plant. The method comprises subjecting the off-gas to at least two quenching stages an aqueous quenching liquid. The quenching liquid used in a first, upstream quench stage, is allowed to have a higher concentration of dissolved particulate matter than the quenching liquid in the second, downstream quench stage. The quenched gas is led through a particle capture zone, typically comprising one or more of a wet scrubber, a Venturi scrubber, and a wet electrostatic precipitator.

The invention relates to an operation instrument for optical tweezers. The operation instrument comprises a laser source, a convex lens, a plane mirror, a two-tone spectroscope, optical wedges, a focusing objective lens, a sample table, a sample pool, an illuminating light source and a CCD camera. Light beams are emitted by the laser source, expanded and shaped by a light beam coupler, and then are converged and irradiated by the plane first mirror, the two-tone spectroscope, the two deflection optical wedges and the focusing objective lens into the sample pool to capture target particles, the first optical wedge and the second optical wedge are driven by a motor to deflect around the Y axis and the X axis respectively in an orthogonal mode, the deflection angle can be measured through an angle sensor, the deflection of the light beams is controlled, and the target particles are moved; the particle capturing and moving process can be visually acquired through the CCD camera and a displayer. When the particles move in the plane parallel to the XOY plane, the sample pool does not need to move, namely, the particles are not affected by external vibration in the moving process; in addition, due to the fact that the two orthogonal deflection optical wedges can achieve the light beam deflection hundredfold-order reduction ratio, the deflection directions of the light beams can be accurately controlled, and the light beams can capture the particles accurately and carry the particles to move firmly.

The invention provides a method for preparing silicon dioxide (SiO2) aerogel with continuous density gradient. The method comprises the following steps of: mixing precursor sol with high target density and precursor sol with low target density continuously by using tetraethoxysilane as an organic silicon source, by adopting a continuous forming process and by automatically designing and constructing a density gradient mixed forming device so as to obtain SiO2 sol with continuous density gradient; standing to gelate; and preparing the SiO2 aerogel with continuous density gradient by an aging replacement process and a supercritical drying process. The physical property of the SiO2 aerogel is in gradient distribution along with the change of density, so the application range is widened. The SiO2 sol with continuous density gradient prepared by the method has the characteristics of large density gradient, complete forming structure, continuous distribution of density, simpleness, convenience and controllability of preparation process and the like, so the SiO2 sol can be applied in the fields of space particle capture for aerospace, research on impact wave characteristics for an inertial confinement fusion test, acoustic resistance anti-gradient matching application, high-resolution Cerenkov detectors, high-vacuum thermal insulation materials and the like.

The invention relates to a method and a device for generating a radial polarized array beam. The method comprises the steps of performing spatial polarization regulation and control on linearly polarized laser, thereby obtaining a radial polarized beam; reducing spatial association characteristic of the radial polarized beam, and obtaining a radial polarized Gaussian-Schell model beam of which the spatial association characteristic accords with Gaussian distribution; regulating the association characteristic of the radial polarized Gaussian-Schell model beam by means of a two-dimensional comb-shaped function, and obtaining a Gaussian array association radial polarized beam; and after the Gaussian array association radial polarized beam is focused by a thin lens, and obtaining the radial polarized array beam at a focus point. Compared with a single-mode beam, the radial polarized array beam generated through the method and the device has advantages of greatly improving working efficiency in application fields such as particle capture and high-density storage, and realizing high research value.

A process for coating the active component on the cellular carrier having particles capturing function includes such steps as standing the cellular carrier vertically, spraying the active component slurry on its top end while applying vacuum (0-85 KPa) to its bottom end, turning said cellular carrier over by 180 deg., repeating above steps, turning the carrier over by 180 deg to release the excess slurry, and drying.

The invention provides an anisotropic conductive adhesive tape and adhesive tape roll, a binding structure and a display apparatus, relates to the technical field of display, and can improve uniformity of the number of conductive particles captured by an electrode, lower risk of poor binding process of a display module, and improve product yield. The anisotropic conductive adhesive tape comprises an insulating adhesive layer and capsule structures scattered in the insulating adhesive layer in preset regions, wherein the insulating adhesive layer comprises multiple preset regions which are arranged at intervals and are corresponding to to-be-bound electrodes; and the capsule structures are used for realizing conductive connection perpendicular to the direction of the adhesive tape surface when the anisotropic conductive adhesive tape suffers from pressure in a direction perpendicular to the adhesive tape surface, wherein the number of the capsule structures in each preset region is greater than a preset number.

Nonpolluting brake assembly comprising a rotor, a pad comprising friction material capable of releasing particles resulting from abrasion, an autonomous suction device for drawing off said particles which comprises an intake opening arranged in the immediate vicinity of the pad and the rotor, a collection chamber for collecting the particles, an impeller driven by the rotor by means of a roller pressing on the rotor, for drawing off the particles through the opening and propelling them into the collection chamber, such that the particles are trapped as close as possible to their emission.

The invention discloses an emission aftertreatment system and method applied to a gasoline engine and relates to the field of tail gas treatment. The emission aftertreatment system comprises a three-way catalysis device, a particle capturing device, an electric heating device and a control module. A carrier in the three-way catalysis device is a metal carrier and is arranged behind an exhaust manifold in an engine room. The particle capturing device is installed at the outlet end of the three-way catalysis device. A filter element of the particle capturing device is formed by ceramic, and the surface of the ceramic is coated with a precious metal catalyst. The electric heating device is fixed to the outer surface of the three-way catalysis device and is used for heating the three-way catalysis device. The control module is connected with an electric heating module and is used for controlling the electric heating device. The invention further provides a corresponding method. The emission aftertreatment system applied to the gasoline engine is adopted, by means of reasonable arrangement of the three-way catalysis device and the particle capturing device and reasonable control over the electric heating device, the treatment capacity of the emission aftertreatment system is improved, and the pollutant emission is reduced.

A particle classifier system and a method of training the system are described. The particle classifier system is suitable for classification of particles in a liquid sample, said particle classifier system comprises—an optical detection assembly comprising at least one image acquisition device with an optical axis, the image acquisition device is configured to acquire images of an image acquisition area perpendicular to said optical axis; —a sample device comprising at least one sample container suitable for holding a sample in liquid form; —a translating arrangement configured to translate said image acquisition area through at least a part of said sample container; —a control system configured to controlling said optical detection assembly and said translating unit to acquire images of a plurality of image acquisition areas; —an image analyzing processing system programmed to analyze said acquired images by a method comprising creating objects (sub-images) of individual particles captured by said acquired images, creating stacks of objects of each individual particle, identifying complete stacks of objects comprising at least one object wherein said particle is in-focus, and two objects wherein said particle is out-of-focus, and determining, for each of said complete stacks of objects, a set of values for a set of features of at least N features, wherein N is larger than or equal to 1, and wherein the determination of said values of said set of features involve data obtained from said at least one object wherein said particle is in-focus, and/or said at least two objects wherein said particle is out-of-focus; and —an artificial intelligent processing system programmed to associate said set of values for said determined set of features for each individual particle to a particle classification.

The invention discloses a gradient type anisotropic conductive film and a manufacturing method thereof. The gradient type anisotropic conductive film comprises a plurality of adhesive material layers, and each adhesive material layer has different conducting particle densities. The manufacturing method comprises the following steps of: firstly manufacturing the adhesive material layers with different conducting particle densities, and then assembling the adhesive material layers in a stack mode; or firstly coating raw adhesive material layers to which no conducting particles are added, then spraying the conducting particles to be embedded into the raw adhesive material layers in an ink jet method to form the adhesive material layers, repeating the step and changing ink jet pressure so as to form the multi-layered gradient type anisotropic conductive film. The manufacturing method not only reduces the addition quantity of the conducting particles, but also increases particle capture rate and excellent product rate.