60results about How to "Improve aggregation performance" patented technology

The invention discloses a laser direct forming bright powder active adjusting coaxial powder feeding nozzle, and relates to the field of additive manufacturing, in particular to a laser direct forming bright powder active adjusting nozzle. The laser direct forming bright powder active adjusting coaxial powder feeding nozzle comprises a laser defocusing amount adjusting mechanism, a connecting sleeve and a powder defocusing amount adjusting mechanism; the laser defocusing amount adjusting mechanism is arranged on the upper portion of the inner side of the connecting sleeve, and the powder defocusing amount adjusting mechanism is arranged on the middle and the lower of the connecting sleeve. The feeding nozzle has the beneficial effects of being novel in structure, easy and convenient to machine, convenient to use, capable of achieving independent adjustment of light spots and powder spots and achieving light spot and powder spot size matching and the like; the novel laser direct forming bright powder active adjusting coaxial powder feeding nozzle integrates economy and practicability.

The invention discloses a feed-forward type microwave antenna, which comprises a radiation source, a first metamaterial panel, a second metamaterial panel and a reflection panel, wherein the first metamaterial panel and the second metamaterial panel are used for diffusing electromagnetic waves emitted by the radiation source; and the reflection panel is stuck at the back of the second metamaterial panel. After being diffused through the first metamaterial panel, the electromagnetic waves enter the second metamaterial panel to be refracted. After being reflected by the reflection panel, the electromagnetic waves enter the second metamaterial panel again to be refracted and finally exit in parallel. The antenna is manufactured by adopting a metamaterial principle; therefore, the antenna is free from limitation of the conventional shapes of a convex shape, a concave lens shape and a parabolic shape; by adopting the antenna disclosed by the invention, the shape of the antenna is planar orin any shape; furthermore, the antenna is thinner in thickness, smaller in volume and more convenient to process and manufacture; and the antenna has the benefits of being low in cost and good in gain effect.

Provided is a hinge and sliding block type laser coaxial powder feeding nozzle with the adjustable powder focal point. Powder feeding pipes are arranged outside a cladding head and located on the periphery of the cladding head through angle adjusting devices. Each angle adjusting device comprises a sleeve, wherein a driving device is arranged on one side of the sleeve. Each powder feeding pipe is located outside the corresponding sleeve, and a sliding rail part is arranged at the end, close to an inlet of each powder feeding pipe. A sliding block part is fixed to each sleeve and slidably arranged on the corresponding sliding rail part, and each sliding block part is connected with the corresponding sliding rail part through a buckle device to prevent the sliding block part from being separated from the sliding rail part in the sliding process. The end, close to an outlet, of each powder feeding pipe is hinged to the cladding head. A central controller is connected with the driving devices. The hinge and sliding block type laser coaxial powder feeding nozzle can dynamically adjust the powder gathering point in real time while the laser defocusing amount is changed, the powder gathering point is made to be located on the surface of a machined part all the time, a clad layer high in precision and quality and good in performance is obtained, and the cladding track width can be changed.

The invention discloses a system for measuring Terahertz reflectance of a stealth material. The system comprises a sample table for accommodating a stealth material to be detected, a Terahertz laser, a beam splitter for splitting Terahertz light, a Terahertz power meter, a Terahertz detector, a reflector for reflecting parallel to the Terahertz light, an off-axis parabolic mirror for focusing the reflected Terahertz light to the stealth material to be detected, and a HeNe laser for performing collimation and auxiliary observation on Terahertz laser. According to the system, the Terahertz reflectance of the stealth material can be accurately measured.

The invention relates to a transient electromagnetic method (TEM) technology and discloses a detection device based on the TEM. The device comprises a transmitting antenna for generating a transient electromagnetic field and a receiving antenna for receiving a secondary electromagnetic field excited by the transient electromagnetic field, wherein the transmitting antenna consists of a coil array which is composed of at least two coils; and an electromagnetic field generated by the coil array is converged towards a set area. According to the detection device based on the TEM, a single coil of a primary field transmitting antenna of the TEM is modified into the coil array consisting of a plurality of coils, and related parameters of various coils in the array are adjusted, so that the generated electromagnetic field vectors are superposed and converged to the set area, and the divergence of the electromagnetic field generated by the transmitting antenna is greatly improved; and therefore, the coverage range of the primary field is constrained, and the converging performance of the transmitting antenna is improved. The detection device is mainly used for the field of electromagnetic detection, such as prospection, underground pipeline detection, metal detection and the like.

The invention discloses a sieve hole built-in type annular laser cladding nozzle which comprises a laser head connection part, a middle part sleeve part and a nozzle part; the laser head connection part is composed of an upper connection sleeve which is connected with a laser head; the middle part sleeve part is composed of a sliding sleeve which is connected with the upper connection sleeve; protective glass is arranged between the lower end of the sliding sleeve and the upper end of a center sleeve; a protective glass water cooled jacket is in threaded connection with the sliding sleeve and the center sleeve; a protective gas hole is formed in the center sleeve; a nozzle part is composed of a conical nozzle core which is connected with the center sleeve; and the outer side of each of the conical nozzle core and the center sleeve is sequentially provided with a powder inlet sleeve, a gas inlet sleeve and a water cooled jacket. The sieve hole built-in type annular laser cladding nozzle overcomes the disadvantages that the service life is short, a powder convergence diameter cannot be regulated, and the existing laser cladding nozzle cannot be suitable for powder particles in different sizes.

The invention relates to a laser coaxial powder feeding nozzle adjustable in powder convergence point and with a conical surface and a lever-type structure. The laser coaxial powder feeding nozzle is characterized in that powder feeding pipes are mounted around a cladding head through an angle regulating device capable of regulating the included angle between the powder feeding pipes and the cladding head; the angle regulating device comprises a sleeve; the cross sectional area of the sleeve in the vertical direction is gradually decreased from top to bottom; a driving device is arranged on one side of the sleeve; a guide device is arranged between the sleeve and the cladding head; the powder feeding pipes are positioned outside the sleeve; one end, close to an inlet, of each of the powder feeding pipes is arranged on the outer wall surface of the sleeve in a vertical sliding manner along the outer wall surface of the sleeve; one end, close to an outlet, of each of the powder feeding pipes is hinged to the cladding head; the middle of each of the powder feeding pipes is connected with the cladding head through a spring; a central controller is connected with the driving device. According to the laser coaxial powder feeding nozzle adjustable in the powder convergence point and with the conical surface and the lever-type structure, when the laser defocusing amount is changed, the powder convergence point is adjusted dynamically in real time, so that the powder convergence point can fall on the surface of a processing part all the time, a cladding layer with high precision, high quality and good performance is achieved, and a cladding track with a changeable width is realized.

A link-lever structured laser coaxial powder-feeding nozzle with an adjustable powder gathering point is characterized in that powder-feeding pipes are arranged outside a cladding head, the powder-feeding pipes are mounted around the cladding head through an angle adjuster that may adjust the included angles between the powder-feeding pipes and the cladding head, each powder-feeding pipe has a downward outlet that is close to a laser outlet, the angle adjuster comprises a sleeve that sleeves the cladding head, one side of the sleeve is provided with a driving device that drives the sleeve to slide up and down along the outer wall of the cladding head, a guiding device is arranged between the sleeve and the cladding head, one end of each powder-feeding pipe close to an inlet is connected to the sleeve through a link, one end of each link is hinged to the corresponding powder-feeding pipe, the other end of each link is hinged to the sleeve, one end of each powder-feeding pipe close to the outlet is hinged to the cladding head, and a central control unit is connected to the driving device. The link-lever structured laser coaxial powder-feeding nozzle with the adjustable powder gathering point allows the powder gathering point to be adjusted dynamically in real time, allows the powder gathering point to fall constantly on the surface of a part under processing, and can provide high-precision high-quality high-performance clad layer with adjustable width of a cladding path.

The invention relates to an antenna based a meta-material and a method for generating working wavelengths of a meta-material panel. The antenna comprises a radiation source and a meta-material panel which has an electromagnetic wave gathering function and works at a first wavelength, wherein the meta-material panel is used for converting electromagnetic waves emitted by the radiation source into planar waves and running the antenna at a second wavelength and a third wavelength which are smaller than the first wavelength and are in different multiple relations with the first wavelength simultaneously. The invention further provides a method for generating a working wavelength of the meta-material panel of the antenna. The method comprises the following steps of: acquiring a numerical valuem3/m2 of the ratio lambda3/lambda2 of the third wavelength lambda3 to the second lambda2 in a preset error range; computing a minimum common multiple m1 of m2 and m3; and generating a working wavelength lambda1 of the meta-material panel, wherein lambda1=lambda2 (m1/m2) or lambda1=lambda3 (m1/m3). The working wavelength of the meta-material panel is designed, so that the antenna can work at different wavelengths simultaneously; and the electromagnetic waves of the radiation source are converted into planar waves, so that gathering performance is enhanced, and the volume and size of the antenna are reduced.

Disclosed is a positive pressure feeding abrasive jet system. The system is composed of a positive pressure feeding system and a mixed spraying head; the positive pressure feeding system comprises an abrasive water pool, a slag slurry pump, an adjusting valve and the like; the mixed spraying head comprises a high-pressure water nozzle, an abrasive water inlet, a mixing cavity and a mixing pipe; abrasive and water are mixed in advance, through positive pressure feeding of the slag slurry pump and uniform sending of a feeding opening in the periphery of the mixing cavity, sufficient mixing and acceleration of the abrasive and high-pressure water can be ensured, through positive pressure feeding, the problems that in existing later mixing abrasive jetting, abrasive is uneven in mixing, the abrasive particle speed is far lower than the water jet speed, a large amount of air is sucked, and jet convergent performance is poor are solved, and the cutting performance and the work efficiency of the abrasive jet flow are improved.

The invention discloses a feed-forward microwave antenna which comprises a radiation source, a first metamaterial panel, a second metamaterial panel and a reflective panel. The first metamaterial panel is used for scattering electromagnetic waves emitted from the radiation source, and the reflective panel is attached on the back of the second metamaterial panel. Electromagnetic waves are scattered by the first metamaterial panel, are refracted by the second metamaterial panel after entering the same, then are reflected by the reflective panel and are refracted by the second metamaterial panel again after entering the second metamaterial panel, and finally are emitted out in parallel. The feed-forward microwave antenna is manufactured according to the principle of the metamaterial, so that the feed-forward microwave antenna is free of limitation of conventional convex lens shape, concave lens shape and parabola shape, can be processed into a plane shape or any other shape, is thinner and smaller and more convenient to process and manufacture, and accordingly has the advantages of low cost and good gaining effect.

The invention discloses an external gate-controlled cold cathode array electron gun. The problems in the prior art such as poor accuracy, poor pressure resistance of devices, poor stability and complex process are solved. The external grid-controlled cold cathode array electron gun comprises a cathode base, a cathode substrate fixed to the cathode base, a cold cathode emission unit array arranged on the upper end face of the cathode substrate and having a slot, and an electron gun shell of which the upper end part is open and the lower end is connected to the cathode base and sealed. The inside of the electron gun shell is hollow. The electron gun shell is composed of a lower sleeve and an upper sleeve, a gate fixing lower base with a through hole in the middle is arranged between the lower sleeve and the upper sleeve, an external gate is mounted on the gate fixing lower base, and a gate fixing upper base is arranged on the external gate. The external gate can move up and down relative to the electron gun shell so that the distance between the external gate and the cathode substrate can be adjusted. The external gate-controlled cold cathode array electron gun of the invention has the advantages of simple manufacturing process, high precision, good consistency, and the like.

The invention relates to a fine dust particle convergent resonant cavity based on multiple sensors, and belongs to the field of electrostatic dust collection. The fine dust particle convergent resonant cavity mainly aims to extend the standing time of fine particles in a convergent electric field in limited space, so that the convergent effect of the fine particles is increased, and the dust collection rate is increased. The fine dust particle convergent resonant cavity is composed of a lower slideway, a tractor, an upper slideway, a push-pull rod, a compression plate, an upper cavity wall, aleft positive convergent plate electrode, an upper pressure sensor, a branch outlet flue left wall, a branch outlet flue, a branch outlet flue right wall, a branch flue outlet electromagnetic valve, aparticle distribution sensor, a right negative convergent plate electrode, filter cloth, a right cavity wall, a lower pressure sensor, a right positive convergent plate electrode, a branch flue inletelectromagnetic valve, a branch flue inlet right wall, a branch flue inlet, a branch flue inlet left wall, a left negative convergent plate electrode, a lower cavity wall, a single chip microcomputer, a first resistor, a first triode, a first relay, a second resistor, a second triode and a tractor stepping motor. The fine dust particle convergent resonant cavity is mainly used in the field of theelectrostatic dust collection.

The invention discloses a supersonic nozzle for miniature ink jet printing, wherein a De Laval nozzle is connected with a gas chamber body by virtue of a locking block so as to be formed into an axisymmetric whole and fixed by virtue of a fastening bolt, and the front end of the gas chamber body is symmetrically provided with a pressure probe interface and a temperature probe interface; symmetric air source inlets are tipsily inserted in the rear end of the gas chamber body, the tail part of the gas chamber body is provided with a coaxial powder feeding pipe by virtue of a U-shaped plug, the connecting part of the De Laval nozzle and the gas chamber body is provided with an annular grid mesh, and high-pressure gas and a power body are converged in the De Laval nozzle and sprayed out. The supersonic nozzle adopts coaxial powder feeding, and the powder feeding pipe is directly communicated with the laryngeal of the De Laval nozzle, so that blockage is prevented; the airflow is uniform and stable due to the effects of the multiple symmetrically-distributed air source inlets and the annular grid mesh, so that acceleration of the powder body is facilitated; a flow pass in the De Laval nozzle is in a regular streamline shape, flow is small, the supersonic speed segment distance is long, the converging of a jet flow outlet is relatively good, and the supersonic nozzle has relatively good application prospect.

The invention discloses a feedback microwave antenna, which comprises a radiation source, a first metamaterial panel and a second metamaterial panel, wherein the first metamaterial panel is used for diverging electromagnetic waves emitted by the radiation source; and the second metamaterial panel has an electromagnetic wave aggregation function and is used for converting the electromagnetic wavesemitted from the first metamaterial panel into plane waves. In the feedback microwave antenna, the antenna is manufactured with a metamaterial principle, and therefore the antenna is free from the limitation of a common convex lens shape, a concave lens shape and a paraboloid shape. According to the antenna of the feedback microwave antenna, the antenna can be in a surface plate shape or any shape, and the antenna has the beneficial effects of thinner thickness, smaller volume, low cost and good gain effect and is convenient to process and manufacture.

The embodiment of the invention provides a real-time data aggregation method and system. The method comprises the steps of receiving a convergence strategy sent by a superior convergence node, takingthe to-be-converged data corresponding to the current moment as target data; if the real-time requirement exists in the target data and the redundancy removal identifier in the convergence strategy isredundancy removal, determining a data compression algorithm and a redundancy elimination algorithm corresponding to the target data according to the shortest time principle; carrying out redundancyelimination and compression on the target data by utilizing a redundancy elimination algorithm and a data compression algorithm corresponding to the target data when a convergence opportunity is reached; and packaging the compressed target data and the data compression algorithm identifier corresponding to the target data, and sending the packaged target data and the data compression algorithm identifier to a superior aggregation node, so that the superior aggregation node decompresses the compressed target data. According to the method and the system, the current aggregation node can transmitthe to-be-aggregated data to the superior aggregation node within the specified time delay, so that the real-time requirement of the to-be-aggregated data can be met, and the aggregation capability of the whole aggregation system can be improved.

The invention provides a magnetic beam powder type powder feeding device for laser additional material manufacturing. The magnetic beam powder type powder feeding device comprises a frame body, a powder charged device, powder pipe position adjustment devices, magnetic beam powder devices and a laser emission unit. The powder charged device comprises a charging unit and a powder feeding unit, wherein the charging unit is used for charging powder, the powder feeding unit is used for conveying the charged powder, the charging unit is arranged at an upstream powder inlet of a powder pipe, and a powder pipe downstream powder outlet of the powder feeding unit is arranged on the lower portion of the frame body through the powder pipe position adjustment devices. The powder pipe position adjustment devices are arranged on the lower portion of the frame body in the circumferential direction. The magnetic beam powder devices are assembled to the powder pipe downstream powder outlet and are provided with magnetic fields enabling the charged powder to be deviated. A laser head of the laser emission unit is arranged on the frame body, and a light outlet of the laser head is aligned with the convergence focus point of the charged powder sent out by the powder pipe. The magnetic beam powder type powder feeding device has the beneficial effects that the convergence of a powder flow is greatlyimproved, and the magnetic beam powder type powder feeding device is greatly helpful to improvement of the forming quality of a powder feeding type laser additional material manufacturing technology;and an original laser can be improved, and thus the cost is lowered.

The invention belongs to the technical field of agricultural insect killing, and particularly relates to a polyether compound. An insect luring apparatus comprises a lampshade, an insect luring deviceand a supporting pipe; the interior of the supporting pipe is hollow, and the supporting pipe is filled with an electric wire; the supporting pipe is fixedly connected to the top of the lampshade andpenetrates through the lampshade; the insect luring device comprises a sealing cover, a fluorescent lamp tube and a light scattering tube; the fluorescent lamp tube is fixedly connected to one side,close to the light scattering tube, of the sealing cover; the fluorescent lamp tube extends into the light scattering tube; a first groove is formed in the surface of one side, close to the light scattering, of the sealing cover; volatilization holes which are uniformly distributed are formed in one side, away from the light scattering tube, of the sealing cover; a first cavity is formed in the lampshade; and air holes are evenly formed in the top of the inner cavity of the lampshade. Insects are lured into the lampshade through lamplight, and volatilization of insecticides is accelerated through heat generated when the fluorescent lamp emits light, so the concentration of the insecticides in the lampshade is increased, and the purpose of killing the insects is achieved.

The invention discloses a lens for a panel lamp and a panel lamp comprising the lens. The lens is provided with a light inlet face and a light outlet face; the light inlet face is a convex face; the light outlet face is a concave face; the width of the light inlet face is larger than that of the light outlet face; light emitted by a light source enters the lens through the light inlet face, is converged through the lens and finally is emitted out in parallel through the light outlet face; and the panel lamp comprises an LED light source, a light guide plate, a reflecting layer, and a back plate. The lens is arranged between the LED light source and the side face of the light guide plate, the convergence effect of the light emitted by the LED light source with the increased width is improved, the light guide plate becomes lighter and thinner under the conditions that the light emitted by the light source is not wasted and the light intensity is enough, the development trend that a panel lamp becomes lighter and thinner gradually is met, and the cost of the light guide plate is greatly reduced.

The invention discloses a material cooling device for a 3D printer, which includes a fixing frame, a printing nozzle is fixed at the bottom of the fixing frame, a printing nozzle is fixed at the bottom of the printing nozzle, and a cooling ring is installed on the printing nozzle. The bottom of the printing nozzle is located on both sides of the printing nozzle and a micro-fan is installed. An air guide cover is installed under the micro-fan. The air guide cover is provided with a shunt pipe connected to the cooling ring. The air guide cover The filter mechanism is installed inside. The invention installs a trumpet-shaped air guide cover under the fan, which improves the convergence ability and guiding of the cooling wind force, improves the cooling efficiency, and the filter foam can filter out impurities in the wind force, which solves the problem of impurities adhering to the model, metal The net plays the role of uniform airflow, which solves the problem of model deformation caused by excessive local wind force.

The invention provides a multi-layer oil-gas separating device for an automobile engine. The purposes being high in separating efficiency, good in filtering effect and multiple in separating layers are achieved. The multi-layer oil-gas separating device for the automobile engine comprises a cover body, and the cover body comprises a chassis and an upper cover (2) which are detachably connected. The multi-layer oil-gas separating device for the automobile engine is characterized in that the chassis (1) is provided with a first air inlet (3), a first channel (4) is arranged on the portion, corresponding to the first air inlet, of the upper cover (2), and a second channel (5) is arranged on the side face of the first channel (4); the chassis (1) is provided with a first partition plate (9), the cover body is provided with a lower channel (6) and an upper channel (7), the lower channel (6) is located under the first partition plate (9), and the upper channel (7) is located over the first partition plate; and a first column ring (8) is fixedly arranged on the chassis (1).

The invention provides an engine oil and gas separation device, which achieves the purposes of high separation efficiency, good filtering effect and more separating layers. The engine oil and gas separation device comprises a cover body, wherein the cover body comprises an underframe and an upper cover (2) which are detachably connected. The engine oil and gas separation device is characterized inthat the underframe (1) is provided with a first air inlet (3), the upper cover (2) is provided with a first passage (4) corresponding to the first air inlet in position, the side face of the first passage (4) is provided with a second passage (5), the underframe (1) is provided with a first partition plate (9), the cover body is provided with a lower passage (6) and an upper passage (7), the lower passage (6) is positioned below the first partition plate (9), the upper passage (7) is positioned above the first partition plate, and the underframe (1) is fixedly provided with a first column ring (8).

The invention discloses a light transceiving device for visible light optical fiber transmission. The light transceiving device comprises a light transmitter and a light receiver, the light transmitter comprises a resonant cavity light-emitting diode, a light transmitter drive circuit, a hemispheric lens with a periodic structure, a planar optical waveguide coupler and an optical isolator, the light receiver comprises an optical receiving module and a limiting amplifier, the hemispheric lens with the periodic structure comprises a hemispheric lens body, and round air holes in array distribution are arranged on the hemispheric lens body. The operating wavelength of the visible light optical fiber transmission is 650nm, and a single-mode quartz optical fiber serves as a transmission medium. Incident fiber optical power coupling effect can be more effectively improved by the aid of the hemispheric lens with the periodic structure. When visible light is transmitted in the quartz optical fiber, few transmission modes are excited for transmission, and accordingly multimode dispersion and interference can be suppressed.