183 results about "Particle trapping" patented technology

Devices, apparatus and methods are disclosed for non-contact pneumatic sampling and sampling of surfaces, persons, articles of clothing, buildings, furnishings, vehicles, baggage, packages, mail, and the like, for contaminating aerosols indicative of a hazard or a benefit, where the contaminating aerosols are chemical, radiological, biological, toxic, or infectious in character. In a first device, a central orifice for pulling a suction gas stream is surrounded by a peripheral array of convergingly-directed gas jets, forming a virtual sampling chamber. The gas jets are configured to deliver millisecond pneumatic pulses that erode particles from solid surfaces at a distance. In another aspect of the invention, a suction gas stream is split using an air-to-air concentrator so that a particle-enriched gas flow is directed to a particle trap and any particles immobilized in the particle trap (including any adsorbed vapors associated with the particles) are selectively analyzed to detect trace residues associated with explosives.

A diffuser particle separator may be integrated into a gas turbine engine to remove corrosive dust and salt particles from the engine's core air flow. The air flow may pass over a series of particle accumulator entrance orifices, trapping particles in a particle accumulator while allowing the air flow to continue unimpeded. Since dust deposits may become molten at high temperatures, removal of dust from the core and secondary airflow may be critical for long-life superalloy and ceramic components, particularly those with small diameter air-cooling holes and thermal barrier coatings.

The invention relates to the technical field of particle dust removal, and in particular relates to a method for efficiently catching nanometer micro-particles and a device for realizing the method. The method comprises the following steps of: enabling particles to carry positive charges or negative charges, mixing airflows to increase agglomeration of particles, and trapping the particles. The device comprises a primary dust collection and charge unit, an induction agglomeration unit and a secondary dust collection unit, all of which are sequentially connected. The method for efficiently catching the nanometer micro-particles, disclosed by the invention, has the advantages of simple and continuous process, easiness for implementation and theoretical and practical application values. According to the method for efficiently catching the nanometer micro-particles and the device for realizing the method, disclosed by the invention, micro-particles can be effectively trapped, the efficiency of trapping the nanometer micro-particles with diameters of lower than 2.5 microns can be improved by at least 30%.

The invention discloses an active regeneration grading control method for a particle trap. The active regeneration grading control method aims to acquire the real-time carbon loading amount and temperatures of the particle trap. According to the carbon loading amount, a plurality of carbon loading limit values are determined, a plurality of temperature limit values are determined according to thetemperatures, the real-time carbon loading amount and the carbon loading amount limit values of the particle trap are compared, the real-time particle trap temperatures and the temperature limit values are compared, an active regeneration mode is determined, and the active regeneration mode is one or a combination containing more than one of the conditions that an engine is controlled to defer theignition angle, the air-fuel ratio becomes lean, and the idle speed is increased. According to the active regeneration grading control method for the particle trap, the mode of active regeneration isdetermined according to the regions where different carbon loading amount and the temperatures of the particle trap are located and the marking of the region, so that the carbon deposition is effectively removed in time when the carbon loading amount is too high, and the exhaust back pressure is reduced.

A method of detecting a fluorescence signal emitted by fluorophores bound to particles confined in a particle trap, includes an objective lens having a focal plane, which is normally the focal plane for incident collimated light. The particle trap is typically located in the focal plane, and a beam of excitation light is directed via the objective lens onto the confined particles in the trap. The excitation light is in the form of a divergent beam coming to focus at a plane displaced from the focal plane. The divergent beam has a spot diameter at the focal plane determined by the divergence of the beam. The fluorescent light emitted by the fluorophores is detected with a confocal detector.

A lithographic apparatus includes a radiation source configured to produce a radiation beam, and a support configured to support a patterning device. The patterning device is configured to impart the radiation beam with a pattern to form a patterned radiation beam. A chamber is located between the radiation source and patterning device. The chamber contains at least one optical component configured to reflect the radiation beam, and is configured to permit radiation from the radiation source to pass therethrough. A membrane (44) is configured to permit the passage of the radiation beam, and to prevent the passage of contamination particles (54) through the membrane. A particle trapping structure (52) is configured to permit gas to flow along an indirect path from inside the chamber to outside the chamber. The indirect path is configured to substantially prevent the passage of contamination particles (58) from inside the chamber to outside the chamber.

The present invention provides a fine particle separation treatment system comprising: a storage tank for storing a solution; a solution circulating passageway for circulating the solution in the storage tank, and a cyclone separator disposed in the solution circulating passageway for separating fine particles in the solution. The cyclone separator comprises: an inlet passageway communicating with a solution outlet side of the storage tank; a flow-out passageway communicating with a solution outlet side of the storage tank; a cyclone portion for generating an eddy flow at a given flow rate by feeding a fine particle-containing solution from the inlet passageway, transferring the fine particles to the outer side by a centrifugal force to issue the solution after separating the fine particles from the flow-out passageway, and precipitating the separated fine particles by decelerating the eddy flow; and a particle trap box for trapping the precipitated fine particles in the cyclone portion through a communication hole. An electrode rod is disposed at the center of the particle trap box, and the fine particles are electrically separated by applying a potential between the electrode rod and an electrode of the particle trap box.

The invention includes PVD targets having non-sputtered regions (such as, for example, sidewalls), and particle-trapping features formed along the non-sputtered regions. In particular aspects, the particle-trapping features can comprise a pattern of bent projections forming receptacles, and can comprise microstructures on the bent projections. The targets can be part of target/backing plate constructions, or can be monolithic. The invention also includes methods of forming particle-trapping features along sidewalls of a sputtering target or along sidewalls of a target/backing plate construction. The features can be formed by initially forming a pattern of projections along a sidewall. The projections can be bent and subsequently exposed to particles to form microstructures on the bent projections.

The embodiment of the invention discloses a particle catcher state reminding method, device and system and a storage medium. An engine control unit can determine the current carbon load of a particlecatcher according to collected vehicle operation condition information and compares the current carbon load with a first carbon load threshold. If the current carbon load exceeds the first carbon loadthreshold, the particle catcher is controlled to execute active regeneration operation, the active regeneration state of the particle catcher is determined, reminding information is generated, and the active regeneration state and the reminding information are sent to a vehicle instrument and a client, so that the vehicle instrument and the client display the active regeneration state and the reminding information. In this way, a driver senses the driving condition difference due to the active regeneration operation in time, thereby avoiding complaints. Moreover, the driver can timely deal with a vehicle according to the display information, so that the situation that the driver knows vehicle faults only when too many particles are accumulated and accordingly normal use is affected is avoided.

A particle detector includes an input port for receiving gas and particulate matter. A charging source generating positively and negatively charged species that charges at least some particulate matter in charging region, thereby generating a plurality of charged particles. A trapping region is formed having a potential energy minimum that attracts and confines the plurality of charged particles. A detector detects charged particles in the trapping region.

The invention discloses an air purification method. The air purification method comprises the steps as follows: a), air to be purified is subjected to adiabatic compression in a compressor, and the temperature of the air is raised to the activation temperature of a catalyst in subsequent catalytic reaction; b), the compressed air enters a catalytic cleaner, and harmful substances in the air change into harmless gases under the action of the catalyst; and c), the purified air which is processed by the catalytic cleaner is fed into an expansion machine for adiabatic expansion, so that the air is cooled. After the air to be purified is subjected to adiabatic compression by the compressor, the air temperature is 50-400 DEG C, the pressure is 0.4-0.8MPa, and the volume compression ratio is 3-6. The catalyst in the catalytic cleaner can be one or more of a PM2.5 honeycomb ceramic particle trapping filter, an ozone catalytic purification agent, a volatile organic chemicals (VOCs) catalytic purification agent, a carbonic oxide (CO) catalytic purification agent, a NOx catalytic purification agent and a SOx trapping cleaning agent. According to the air purification method, the harmful substances in the air can be effectively removed, the indoor air quality is improved, and the energy can be saved remarkably.

A non-polluting brake assembly comprising a caliper bracket, a rotor disc, two movable pads clamped by a caliper, the pads comprising friction material capable of releasing particles resulting from abrasion, and a suction device arranged at least partially in proximity to the caliper bracket, the suction device comprising, in proximity to each pad, a suction zone delimited by a deflector and in which a negative pressure is created, characterized in that the deflector comprises at least one portion located in an external radial position relative to the pad.

The invention provides a method for preparing an equivalent life-cycle ash degradation sample piece of a gasoline particulate filter (GPF). The method comprises the following steps: (1) determining anaverage engine oil consumption of a GPF supporting vehicle; (2) analyzing and determining compositions of boron, calcium, magnesium, phosphorus and zinc in an engine oil used by the GPF supporting vehicle, and the content of sulfate ash; (3) substituting data measured in the step (1) and the step (2) into a GPF life-cycle ash degradation amount prediction calculation formula to calculate a totalGPF life-cycle target ash accumulation amount; and (4) using a GPF rapid ash accumulation cycle on an engine pedestal to finally obtain the equivalent life-cycle ash degradation sample piece of the GPF. The method for preparing the equivalent life-cycle ash degradation sample piece of the GPF provided by the invention can calculate the accumulation amount of the GPF life-cycle degradation ash, rapidly accumulates ash by the engine pedestal, and finally prepares the equivalent real vehicle life-cycle ash degradation sample piece of the GPF.

Embodiments disclosed herein generally relate to a head slider within disk drive data storage devices. A head slider comprises a head body having a leading portion on a leading edge and a trailing portion on a trailing edge. The leading portion includes a first leading pad disposed at the MFS and a second leading pad disposed between the first leading pad and the leading edge. The second leading pad is recessed a first vertical distance from the MFS. One or more particle trapping holes are disposed between the first leading pad and the second leading pad. The one or more particle trapping holes are recessed a second vertical distance from the MFS, the second vertical distance being greater than the first vertical distance. Particles encountered by the leading portion may be suctioned into the one or more particle trapping holes, preventing the particles from building-up onto the MFS.