85 results about "Particle capture" patented technology

The invention discloses a method for generating a staggered superposition double-layer Airy light beam array capable of realizing double focusing, and belongs to the technical field of structured light regulation and control and special light beam generation. Aiming at the problems that the focusing characteristics of light beam arrays in transmission in different superposition modes are difficult to fully reveal in the prior art and the generation of an optical bottle depends on complex phase modulation or multiple optical elements, the method comprises the following steps: constructing a first layer of Airy light beam array and setting regulation and control parameters, constructing a second layer of Airy light beam array with staggered azimuth angles and setting regulation and control parameters, and constructing a second layer of Airy light beam array with staggered azimuth angles; a longitudinal double-focusing structure is realized through staggered superposition of double-layer Airy light beam arrays, and a vortex phase is introduced into double-focusing array light beams to form an optical bottle structure. According to the invention, the structure is simple, the longitudinal double-focusing and optical bottle structure can be realized only through the initial light field structure design, the focusing intensity and the regulation freedom degree are high, and the application of the light beam in the related fields of microscopic imaging, particle capture and the like is expanded.

The invention relates to a converter valve water-cooling voltage-sharing electrode charged particle distribution simulation method and system. The method comprises the following steps: constructing a three-dimensional geometric model of multiple types of voltage-sharing electrodes; constructing a charged particle multi-physics field coupling model based on the three-dimensional geometric model, wherein the coupling model comprises a flow field control equation, an electric field control equation and a particle dynamics model; simulation boundary conditions and initial conditions are set, the boundary conditions comprise flow field boundary conditions and electric field boundary conditions, and the initial conditions comprise particle release initial conditions; on the basis of the coupling model, the simulation boundary condition and the initial condition, particle tracking and distribution characteristic resolving are executed, a simulation result is obtained, and the simulation result comprises a particle motion trail, a particle capture rate and a capture area. Compared with the prior art, the method has the advantages of breaking through macroscopic monitoring limitation, realizing microcosmic dynamic quantitative analysis, analyzing a multi-field force competition mechanism, revealing a local scaling source, verifying the advantages of a multi-electrode structure, supporting optimal design and the like.

The invention relates to an optical assembly (4) for a semiconductor lithography system, in particular for a projection exposure system, comprising: at least one housing (32, 32') with an interior (33, 33'), and at least one optical component (19, 20, 21) having a surface (19a, 20a, 21a) facing the interior (33, 33'). The optical assembly (3) has at least one porous particle trapping structure (29, 29') arranged on an inner surface (34a, 34a') of a wall (34, 34') of the housing (32, 32') or incorporated in the wall of the housing for trapping contaminating particles (24a, 24b) present in the interior (33, 33'). The invention also relates to a semiconductor lithography system, in particular a projection exposure system, comprising at least one such optical assembly (4).

The utility model provides a kind of optical fiber optical tweezers fluorescence lifetime detection equipment, by the light beam emitted by light source is divided into two ways, using the first optical fiber coupler to the two-way light signal received is coupled, and the light signal after coupling is transmitted to the optical fiber circulator connected, transmission to displacement control assembly by optical fiber circulator. Displacement control assembly utilizes one-way light signal to carry out target micro-particle capture, utilizes another light beam corresponding light signal to excite target micro-particle to generate excitation fluorescence signal, utilizes detection assembly to carry out photon number detection to excitation fluorescence signal, determines the fluorescence lifetime of target micro-particle. The utility model equipment can be realized in flexible control micro-particle, and the fluorescence lifetime of micro-particle is detected, and the utility model is more simple and efficient, applicable to precision large instrument to carry out ultrafast signal detection.

A correction and capture method for a biological particle capture device includes: providing an image observation unit facing a side of a carrier platform on an observation platform and orientating a view region of the image observation unit towards a carrier region of the carrier platform for taking images; performing a fixed point displacement on the observation platform by the image observation unit based on several observation basic coordinates on an observation platform coordinate system and defining a correction point in an image of the view region when the image observation unit is positioned at one observation basic coordinate and take the image; controlling a capture portion of the particle capture tool to enter the image of the view region; adjusting the capture portion to align with the correction point and recording a capture correction coordinate by the terminal device.

This invention provides a wind erosion monitoring system and method based on distributed optical fiber, belonging to the field of optical-based wind and sand monitoring technology. It includes: constructing a wind erosion monitoring system comprising a linearly tunable laser, an optical isolator, a first coupler, an upper branch, a lower branch, a sand particle capture sensor, a photoelectric detection and acquisition module, and a host computer; utilizing the Rayleigh scattering signal of the linearly swept laser in the sensing optical fiber and the interference with a reference light, the vibration information distributed along the optical fiber is obtained by demodulating the beat frequency signal; combining the constructed sand particle impact and optical fiber coupling model, the dynamic strain generated by sand particle impact is converted into phase changes, realizing the acquisition of sand particle impact location, sand particle size, and sand particle quantity. This invention enables continuous distributed monitoring of wind and sand flows with high spatial resolution, and has advantages such as resistance to electromagnetic interference, strong environmental adaptability, and multi-parameter sensing, and can operate stably for a long time in harsh desert environments.

The present application relates to a kind of vehicle body paint exhaust treatment tower spray circulating water tank, belong to industrial waste gas treatment equipment technical field.The device includes tower body, spray core shaft, drive ring seat, first suspension ring and second suspension ring, and the inside of tower body is equipped with processing cavity, and its upper and lower ends are equipped with shaft support, bottom is equipped with liquid collecting tank, and side wall is equipped with air inlet;Spray core shaft includes guide cone, guide cap, sub-guide ball and main shaft core, and circulating pump is arranged in main shaft core, and spray core shaft surface is provided with spray hole;Multiple drive ring seats are respectively corresponding to control multiple suspension rings, and its surface is equipped with magnetic yoke coil and exciter, and the permanent magnet block of drive suspension ring outer periphery realizes magnetic suspension rotation.The present application is by spray-magnetic suspension disturbance-flow channel trapping coupling mechanism, so that water and waste gas are fully contacted, agitated and dispersed in processing cavity, while extending waste gas residence time, improve particle capture efficiency and purification capacity, applicable to high concentration workshop waste gas treatment scene.

Embodiments relate to a biosensor. The biosensor includes an electrochemical system having a generator electrode, a collector electrode, and electrolyte. The generator electrode includes a particle capture region having an aspect ratio that is greater than 1. The particle capture region is a portion of the generator electrode configured to attract a particle supported within the electrolyte. The electrochemical system is operated so as to bias one of the generator electrode or the collector electrode below its formal potential while biasing the other electrode above its formal potential. The biosensor includes a processing module configured to measure electric current generated by the electrochemical system.

A charged particle trapping device is disclosed. The device includes a charged particle trap (3) (Figure 2) which includes a set of electrodes (6) for generating an electric field for manipulating charged particles. The device comprises a voltage source (44) having an output, and a demultiplexer (26) having an input and a plurality of outputs, wherein the output of the voltage source is coupled to the input of the demultiplexer, and each of the plurality of outputs of the demultiplexer is coupled to each of the electrodes of the set of electrodes. The demultiplexer is configured to sequentially charge the electrodes in a first phase, and to be disconnected from the electrodes for a given time in a second phase to provide a relatively low-noise environment in which operation can be performed on charged particles.

The invention provides a maneuvering target correlation and tracking method under sparse observation based on a bimodal particle flow, and the method comprises the steps: constructing a core layer and exploration layer bimodal particle swarm with differentiated process noise, and employing a particle individual nearest neighbor normalization distance based on measurement noise as a soft gate correlation criterion. And the overall particle distribution is corrected by using a particle flow algorithm after exploration of particle capture observation. According to the method, the problem of deadlock caused by excessive confidence can be solved, accurate tracking of the sudden maneuvering target is always kept, the robustness under sparse observation can be remarkably improved, and breakpoint-free tracking can be realized. Moreover, the method does not need to maintain a plurality of filter models like an IMM algorithm, can achieve the coverage of a plurality of motion modes only through the adjustment of the particle noise distribution, is suitable for the real-time implementation of an engineering, and is more suitable for GPU parallelism.

The invention discloses an efficient light-driven particle capture actuator based on a GO / PDMS-AuNBPs composite film, and belongs to the technical field of micro-nano control and biomedical engineering. The actuator aims at solving the problems that an existing light-driven particle capturing technology is low in photothermal conversion efficiency, depends on high-power laser, and is poor in thermal field stability and single in function. The core structure comprises a photo-thermal composite film and an optical fiber F-P sensing structure. The photo-thermal composite film is composed of a graphene oxide (GO) film and a polydimethylsiloxane (PDMS) film doped with gold nano bipyramid (AuNBPs). The optical fiber interference structure is formed by welding a single mode fiber (SMF) and a hollow fiber (HCF), and the end face of the HCF is coated with a photo-thermal composite film to construct a Fabry-Perot interference (FPI) microcavity; and the sensing unit realizes real-time monitoring of the capture state by monitoring the change of the reflection spectrum of the FPI microcavity. During working, the FPI microcavity plays a role in expanding a beam of a light field so as to improve the light field utilization rate of the GO film. PDMS regulation and control form an axisymmetric temperature potential well, and Marangoni force caused by temperature gradient drives particle capture. The lowest excitation power of the actuator is 11.9 mW, particles of 5-400 microns can be captured, and the actuator has low power consumption, high stability and biological compatibility and is suitable for living cell control, micro-reactor construction and micro-fluidic chip integration.

A laser control device controls the phase of light output from a spatial light modulator that generates optical tweezers on the basis of the vibration frequency of particles captured by an optical tweezers array.

A membrane design utilizing a tiling. In some embodiments, the tiling design is employed in transport processes including filtration and particle capture, static mixing, catalyst support, and heat transfer. Membrane design includes selecting walls from each tile in the tiling to be removed.

The invention relates to dynamic adjustable optical tweezers based on a polarization-sensitive transverse bifocal superlens, and belongs to the field of optical tweezers technology and micro-nano optics. According to the super-lens, dynamic regulation and control of a focus are realized by using sensitive response of the silicon nano-column array to polarization through a composite propagation phase and a geometric phase. Under linear polarization or elliptically polarized light, the system can generate transversely symmetrical double focuses; under the circularly polarized light, a single-side focus is formed. By adjusting the polarization state of incident light, a double-particle capture mode, a single-particle capture mode and a particle transverse transport mode can be flexibly switched. According to the invention, the physical structure does not need to be changed, the dynamic control can be realized only by external optical regulation and control, the structure is compact, the integration degree is high, the control is flexible and the like, and a new technical approach is provided for an on-chip particle control system.

A method of directed evolution for developing a membrane includes using a 3D protocol to simulate particle trajectories and determine the effect of intermolecular forces on particle capture performance during membrane filtration to determine the effectiveness of different candidate membranes in optimizing performance.

The invention relates to the technical field of electric appliance engineering, in particular to a metal particle trap structure based on electrostatic induction. Through the synergistic effect of the electrostatic induction electrode and the high-adsorption specific surface structure, a metal particle active capture trap mechanism is constructed. A high-gradient electric field generated by the induction electrode guides polarized metal particles in the environment to migrate to the trap groove; the trap groove dissipates kinetic energy of collision metal particles through a special inclined plane geometric structure and a surface coating, so that the particle capturing probability is improved; and meanwhile, the metal particles are finally deposited at the bottom of the trap in the migration process by combining the effects of structural diversion, dielectrophoretic force induction and gravity settling. The above various synergistic effects significantly improve the global capture efficiency of particles of different materials, sizes and motion states, and the method is suitable for a direct current GIL / GIS environment with complex electric field distribution.

A device may include one or more processors and a memory including machine readable instructions, the machine-readable instructions, when executed by the one or more processors, cause the apparatus to receive a plurality of images of the particles captured by the camera when a layer of the particles on a build plane of the additive manufacturing system is exposed to an energy beam of the additive manufacturing system, and combine the plurality of images to generate an image of a molten pool trajectory of the layer of the particles.

The invention discloses a particle capturing assembly for a direct-current GIL, which comprises a GIL barrel, a particle capturing device and a fastener, a barrel flange is arranged at the end part of the GIL barrel, and a plurality of threaded holes are formed in the end surface of the barrel flange; the particle trapper comprises a cylindrical trapper body and a trapper flange fixed at one end of the trapper body, the end face of the trapper flange is a machining plane and is in plane fit with the end face of the cylindrical flange, and a plurality of sunk screw mounting holes are uniformly distributed in the circumference of the trapper flange; according to the utility model, the processing procedures are effectively reduced, the spraying difficulty is effectively reduced, the assembling difficulty is effectively reduced, the assembling time is effectively shortened, the assembling efficiency is effectively improved, and meanwhile, the storage and maintenance cost is effectively reduced.

The invention provides a friction-piezoelectric composite nano-generator. The friction-piezoelectric composite nano-generator comprises a friction nano-generator and a piezoelectric nano-generator, the friction nanometer generator comprises a positive friction layer and a negative friction layer; the positive friction layer is a hydrophobic modified nylon fiber membrane, and the negative friction layer is a PET / PDMS-PAN composite Janus fiber membrane with an interdigital micro-nano structure; the piezoelectric nano generator comprises a CA / ZnO (at) MXene composite fiber membrane and a conductive silver foil. And the piezoelectric nano generator is arranged between the positive friction layer and the negative friction layer. The friction-piezoelectric composite nano generator serves as a filtering medium, power is continuously supplied through breathing kinetic energy, the electrostatic capture capacity is enhanced, the efficient particle capture and low airflow resistance characteristics are achieved at the same time under the conditions of high wind speed and high humidity, and then efficient dust filtering and humidity self-adaptive regulation and control are achieved.

The present application relates to a system (1) designed to capture particles (16) and intended to be mounted on a damping means (2), said system comprising at least one suction tube (5) for sucking up the particles (16), a collection chamber (8) into which the suction tube (5) opens, said collection chamber (8) being connected to the external environment (9) via at least a first filter (10) and at least a second filter (12), each capable of filtering the particles (16) coming from the suction tube (5) and opening into the chamber (8), and at least a first independent device (14) and at least a second independent device (15) for generating an air flow.

An air filtration system includes a housing defining separate first and second pathways for air to pass from outside the system through respective pluralities of filters, each plurality comprising a prefilter and an electrically enhanced filter having a high-voltage conductor, a ground grid, and filter media disposed between the conductor and grid. Energizing the high-voltage conductor establishes an electric field across the filter media to enhance particle capture. A fan is configured to draw air from outside the system concurrently through both pathways for sequential filtration.

The invention discloses secondary cyclone dust removal equipment for underground air purification, and belongs to the technical field of coal mine dust removal equipment, the secondary cyclone dust removal equipment comprises a vertically arranged primary cyclone dust collector, and is characterized in that the upper part of the primary cyclone dust collector is communicated with a vertically arranged secondary cyclone dust removal integrator; the secondary cyclone dust removal integrator comprises a plurality of secondary cyclone dust removers which are distributed in a circumferential array manner, a dust collection barrel communicated with the lower parts of all the secondary cyclone dust removers, and an air collection barrel communicated with the upper parts of all the secondary cyclone dust removers. According to the dust removal equipment, the two-stage cyclone dust removers are adopted to work in parallel, compared with a traditional first-stage cyclone dust remover, the dust emission concentration is effectively reduced, and due to the fact that the multiple second-stage cyclone dust removers are arranged, fine particles can be captured more efficiently; the integrated design saves space and adapts to the underground narrow environment.

The invention belongs to the technical field of environmental protection and chemical equipment, and particularly relates to a rotational flow electrostatic coupling dust removal and recovery device and process for anthraquinone pigment drying tail gas. The invention aims to solve the problems of low fine particle trapping efficiency, high spark discharge risk of an electric dust remover, interference between an ash cleaning mechanism and a discharge electrode and the like in treatment of mixed tail gas containing flammable organic solvent steam and high-viscosity and high-specific resistance anthraquinone ultrafine dust. The device comprises an integrated vertical cylindrical shell, and a cyclone separation section, a transition steady flow section and an electrostatic dust collection section which are integrated from bottom to top, a conductive main shaft which coaxially rotates is arranged in the electrostatic dust collection section, and a rigid discharge electrode and an insulating spiral scraper are synchronously mounted on the conductive main shaft, so that integration of dynamic corona discharge and continuous dust removal is realized. Through nitrogen inerting protection, wide-spacing low-field-intensity corona design and a PTFE insulation scraping structure, intrinsic safety operation is ensured, and efficient trapping and closed-loop recovery of dust of 0.1-10 microns are achieved.

The utility model discloses a dust removal structure for efficient graphitization processing, and aims to solve the problem that a dust removal structure is poor in demisting effect. Comprising a dust collecting pipe arranged at the upper end of the graphitization furnace, and the dust collecting pipe is connected with a spray tower. A spraying mechanism and a demisting mechanism are arranged in the spraying tower. The demisting mechanism comprises a plurality of baffle plates A and baffle plates B which are uniformly arrayed, baffle gaps are formed among the baffle plates, and adjusting plates are arranged in the gaps. The adjusting plate and the baffle plate A form a first particle capturing gap, and the adjusting plate and the baffle plate B form a second particle capturing gap. The width of the first particle capturing gap is gradually reduced, the width of the second particle capturing gap is gradually increased, and the first particle capturing gap is larger than the second particle capturing gap at the inlet. Each of the baffle plate A and the baffle plate B consists of five sections of plates, and the inclined sections are alternately bent at 45 degrees and-45 degrees; a through hole is formed in the third inclined plate on the adjusting plate. According to the invention, graded trapping of particulate matters is realized through the gap design with variable width, and water mist distribution and fine particle adsorption are enhanced through the through holes.

The application provides a cement-based aerogel material with intrinsic anti-aging ability and stable optical performance and a preparation method thereof, anti-aging functional groups are chemically bonded to the cement-based aerogel network through in-situ copolymerization, the pore structure and optical performance are optimized, and the synergistic improvement of anti-aging performance and optical stability is realized. The raw materials of the cement-based aerogel material include a matrix material and a functional monomer, the matrix material is composed of silicate cement and silica sol, wherein the cement accounts for 50-70wt%, and the silica sol accounts for 30-50wt%; the functional monomer includes ultraviolet absorbing monomer A, antioxidant monomer B and hydrophobic monomer C, and the total amount of the functional monomer ranges from 1wt% to 8wt%. The cement-based aerogel material obtained in the application has excellent physical performance (such as optical performance), greatly promotes the important application value and application potential of the material in the fields of optoelectronic devices, gas-sensitive sensors, space high-speed particle capture and electrochemical energy storage devices, thermal insulation and the like.

The present application relates to a method for quantifying the ability of microbial mat to capture and bind particles, the method comprises the following steps: cultivating microbial mat according to the physical and chemical conditions of the water body at the sampling point; taking several portions of the microbial mat, and carrying out multiple groups of capture experiments on mixed particles of different particle sizes, wherein for each group of capture experiments, the weight of the particles captured by the microbial mat is measured, and the microbial mat after capturing the particles is further cultivated, and the weight of the particles bound by the microbial mat is measured after the capture experiment ends; taking several portions of the microbial mat, and carrying out multiple groups of blank experiments on mixed particles of different particle sizes after sterilization and cleaning, wherein for each group of blank experiments, the weight of the particles captured by the microbial mat is measured, and the microbial mat after capturing the particles is further cultivated, and the weight of the particles bound by the microbial mat is measured after the blank experiment ends; determining the weight proportion of particles of different particle sizes by comparing the measurement results of the capture experiments and the blank experiments, and analyzing the ability of the microbial mat to capture and bind particles based on the weight proportion.

A capture unit for maintaining the particle-free status of a closed cavity (14) of a radiation-based control device (10) is characterized in that it comprises an electrostatically charged needle, bundles of needles, e.g. also carbon fibers (22) and a collection tray (24a) arranged vertically below it. This creates a strong and inhomogeneous electric field in the cavity (14) surrounding the needle tip (23), causing suspended particles in the cavity (14) to be attracted to the needle tip and deposited there. During periods of power-off inactivity of the transmitter or receiver (10), the adhering particles detach from the needle tip (23) and sink due to gravity into the collection tray (24a), thus preventing them from settling on the sensitive surface of the transmitter or receiver (10).

The utility model discloses a multipurpose square special-shaped tube heat exchanger, which belongs to the technical field of heat exchange equipment and comprises an upright square shell, a plurality of heat exchange-spraying units and a control system, the lower end of the shell is a liquid outlet, the upper end of the shell is a material outlet, and a material inlet is formed in a reducing part of the upper part of the liquid outlet; the heat exchange-spraying unit comprises a spraying device composed of a plurality of spraying pipes and a heat exchange pipe set arranged on the lower portion of the spraying device. The heat exchange tube group consists of a plurality of layers of special-shaped heat exchange tubes which are arranged up and down; a main liquid inlet pipe is arranged at the lower end of the heat exchange pipe set, and a main liquid outlet pipe is arranged at the upper end. The liquid-liquid heat exchanger can be suitable for liquid-liquid heat exchange, particle capture and gas phase condensation, and heat exchange, dust removal and condensation are achieved through the cooperation of different media flowing through the shell and the work of the heat exchange pipe set and the spraying device.

A particle separation device according to an embodiment is provided with a storage unit, a filter, and a microchannel. The storage unit stores a suspension containing target particles and non-target particles smaller than the target particles. A filter captures the target particles from the suspension and passes the non-target particles. A microfluidic channel separates the target particles from the suspension. The particle separation device delivers the suspension stored in the storage unit to the filter, and delivers the suspension containing the target particles captured by the filter to the microchannel.

The application discloses a device and method for detecting the motion of a particle captured in an optical trap. Transmission light is emitted from a transmission light source, and the transmission light is incident on an optical waveguide. The optical trap capturing light and the particle are arranged on the circumferential side of the optical waveguide, the particle is captured by the optical trap capturing light, the transmission light in the optical waveguide is coupled into the particle and then coupled back into the optical waveguide, and finally incident on a power detector. The transmission light, the particle and the waveguide form an acoustic-optic system. The waveguide is fixed, and at this time, the motion of the captured particle will change the relative distance between the two, and then change the transmittance of the transmission light in the waveguide, so as to calculate the motion information of the captured particle, and realize the detection of the motion of the particle captured in the optical trap. The application can greatly reduce the optical path complexity and volume of the particle motion detection module in the optical trap system, reduce the coupling of the motion signals between the axes of the particle, greatly reduce the light power intensity required for detecting the motion of the captured particle, improve the detection efficiency, and has practical application value.