41results about How to "Limit thickness" patented technology

The invention provides an image-capturing lens. The lens comprises a plurality of lenses, wherein, the lenses comprise a first lens with negative power, a second lens with negative power, a third lens with positive power, a fourth lens with negative power, a fifth lens with positive power and a sixth lens with positive power which are sequentially arranged from an object side to an image side; and each lens comprises an object side face arranged towards the object side and an image side face arranged towards the image side. The image-capturing lens meets the following conditional expressions: (1) R1 is more than 8mm and less than 12mm; (2) R2 is more than 1mm and less than 2mm; (3) Nd1 is more than 1.8 and less than 2; (4) vd1 is more than 30 and less than 50; (5) D1 is more than 0.8mm and less than 1.2mm; and (6) -f1 is more than 2 and less than 3, wherein, R1 is curvature radius of the object side face of the first lens; R2 is the curvature radius of the image side face of the first lens; Nd1 is the refractive index of the first lens; vd1 is the Abbe number of the first lens; D1 is the center thickness of the first lens; and f1 is the focal length of the first lens.

The invention discloses a synchronous laser heat treatment method for laser additive manufacturing a nickel-based high-temperature alloy. According to the method, morphology size and distribution of Laves phase can be effectively regulated and controlled, the Laves phase is converted into a discrete granular shape from a deposited continuous long strip, and the volume fraction of the Laves phase is obviously reduced along with extension of the laser heat treatment time. According to the laser heat treatment method, synchronous heat treatment in a deposition forming process can be realized, local area Laves phase morphology and distribution can be regulated and controlled under the condition that the tissue performance of a laser repair base material area is not influenced, the granular Laves phase which are fined and dispersion distributed is obtained, so that the overall mechanical property of parts is improved, and effective utilization can be obtained in the repair and remanufacturing of the high-temperature alloy structural member; and in addition, the method can also be applied to the fields of high-temperature alloy material preparation, high-temperature alloy structural member rapid manufacturing and the like.

The invention relates to a metamaterial base station antenna housing and an antenna system. The metamaterial base station antenna housing is covered on an antenna and comprises at least one metamaterial sheet layer, wherein each of the metamaterial sheet layer comprises a substrate and a plurality of artificial microstructures arranged on the substrate in an array; the substrate can be divided into a plurality of metamaterial units, and each of the metamaterial units is configured with one artificial microstructure; each of the artificial microstructure comprises a cross-shaped structure arranged at the center of the metamaterial unit and four circular ring structures arranged in four quadrants divided by the cross-shaped structure respectively. According to the invention, the artificial microstructures with special shapes are adhered to the substrate, the relative dielectric constant, the refractive index and the impedance of the material are changed through adjusting the shape and the size of the artificial microstructures, thereby reinforcing transmission of electromagnetic waves, and improving the directivity and the gain of the antenna.

The invention relates to a full-automatic continuous filtering and filter pressing slag unloading machine comprising a filtering device, wherein the filtering device comprises a filter cartridge, a filtering stirring shaft and a first filtering medium; a liquid inlet is arranged on the top end of the filter cartridge; the filtering stirring shaft is installed in the filter cartridge through a sealing bearing, and a helical blade is arranged on the filtering stirring shaft; the first filtering medium is arranged between the inner wall of the filter cartridge and the filtering stirring shaft; a liquid outlet is arranged on the bottom end of the filter cartridge; and a press filtering device, the press filtering device comprises a press filter cartridge, a press filtering stirring shaft and a second filtering medium; a slag inlet is arranged on the top end of the press filter cartridge, and the slag inlet is communicated with the liquid outlet; the press filtering stirring shaft is installed in the press filter cartridge through a sealing bearing, and a helical blade is arranged on the press filtering stirring shaft; the second filtering medium is arranged between the inner wall of the press filter cartridge and the press filtering stirring shaft; and a slag outlet is arranged on the bottom end of the press filter cartridge, and an automatic resetting switch is arranged at the slag outlet. The full-automatic continuous filtering and filter pressing slag unloading machine provided by the invention can be conducted with continuous pressure filtration, can automatically feed and automatically discharge and unload slag and is consistently located at a thin layer filtering environment, so that the filtering speed is high, and the machine is operated under a complete sealed state, and the operation environment is excellent.

The invention discloses a light emitting diode epitaxial wafer and a manufacturing method of the light emitting diode epitaxial wafer, and belongs to the technical field of semiconductors. The epitaxial wafer comprises a substrate, a nucleating layer, a buffer layer, an undoped GaN layer, an n-type layer, a multiple-quantum-well layer, a first p-type GaN layer, a second p-type GaN layer, an electron barrier layer and a p-type layer, wherein the nucleating layer, the buffer layer, the undoped GaN layer, the n-type layer, the multiple-quantum-well layer, the first p-type GaN layer, the second p-type GaN layer, the electron barrier layer and the p-type layer grow upwards on the substrate. The thickness of the electron barrier layer ranges from 50 nm to 150 nm, the growth temperature of the first p-type GaN layer ranges from 600 DEG C to 800 DEG C, the growth pressure of the first p-type GaN layer ranges from 400 Torr to 800 Torr, the growth temperature of the second p-type GaN layer ranges from 800 DEG C to 1000 DEG C, the growth pressure of the second p-type GaN layer ranges from 50 Torr to 500 Torr. The first p-type GaN layer growing under high pressure and low temperature is arranged, and a hole injection channel is provided, so that hole injection efficiency is improved; through the second p-type GaN layer growing under low pressure and high temperature, crystalline quality is improved, the thickness of the electron barrier layer is limited, and hole injection efficiency is improved.

The invention relates to a piston with a (Ti, Al)N multilayer heat insulating and wear resisting super-thick coating on the surface and a preparation technology and application of the piston. The structure of the piston comprises two schemes. According to the first scheme, the piston comprises a base, a TiAl transition layer and a TiAlN clad layer, and the TiAl transition layer evenly wraps the base; and the TiAlN clad layer evenly wraps the TiAl transition layer. According to the second scheme, the piston comprises a base, a first TiAl transition layer, a first TiAlN clad layer, a second TiAltransition layer and a second TiAlN clad layer, and the piston structurally comprises the base, the first TiAl transition layer, the first TiAlN clad layer, the second TiAl transition layer and the second TiAlN clad layer in sequence. According to application of the piston, the piston is used for an internal combustion engine. The designed piston surface has heat insulation performance, wear resistance, oxidation resistance and heat shock resistance, and the service life of the piston is effectively prolonged.

The invention discloses a visual broken line detection system for a warp knitting machine, comprising light sources, an image collecting module and a control module, wherein the image collecting module comprises multiple image collectors, the light sources are arranged corresponding to the image collectors, the image collecting modules collects the image of cloth on the warp knitting machine and transmits the image to the control module, and the control module controls the warp knitting machine according to the collected image information. According to the visual broken line detection system, the image collectors are erected above the cloth, the cloth on the warp knitting machine can be subjected to image collecting, the collected image is processed by an image processing module of the control module, whether the broken yarn situation occurs or not is judged, if the broken yarn situation occurs, a stop signal is transmitted to control the warp knitting machine to stop automatically, the limitations on type and thickness of cloth are overcome due to the strong adaptability of machine vision, the broken yarn automatic stopping is realized completely, so that the working efficiency is greatly improved, and the error judgment rate and miss judgment rate are reduced.

The invention discloses a blue brick for repairing an ancient building wall. The blue brick comprises a brick blank and coating, wherein the brick blank comprises the following components: plastic clay, an inorganic dispersant, a pigment, a reinforcing fiber, an orange-peel agent, a water reducing agent and aggregate; the coating is petroleum asphalt coating. According to the blue brick for repairing the ancient building wall, after the surface of the brick blank is treated by a liquid petroleum asphalt diluent, on one hand, the attached liquid petroleum asphalt can enhance the anti-acid corrosion and anti-weathering effects, and after use, a time-induced special sense of vicissitudes can be formed on the surface of the brick; the blue brick for repairing the ancient building wall is low in cost, wide in raw material sources, and high in anti-corrosion, wear-resistant and anti-weathering effects; in addition, after restoration, cracks on the surface of an ancient building and the time-induced special sense of vicissitudes can be still maintained, so that a sense of repairing the ancient building as an old building is achieved; the blue brick is an environment-friendly and safe novel building material.

The invention belongs to the technical field of printed circuit boards, and concretely relates to a multichip typesetting substrate. The multichip typesetting substrate comprises a frame (2) and multiple child substrates (3), the frame (2) and each child substrate (3) as well as the child substrates (3) are connected through multiple connecting mechanisms (8), and each connecting mechanism (8) comprises at least a mechanical limiting connection mechanism (4) which is used for limiting the child substrate (3) to move in two directions perpendicular to the surface of the frame (2). The invention also discloses a manufacturing method of the multichip typesetting substrate. The multichip typesetting substrate disclosed by the invention can reliably limit the child substrates to move in two directions perpendicular to the frame (2), therefore, the connecting strength between the child substrates, or between each child substrate and the frame, is greatly improved.

The invention relates to a preparation method of a composite desalination layer nanofiltration membrane. The method comprises the following steps of coating a polysulfone ultrafiltration base membranewith a polyvinyl alcohol-polyethyleneimine mixed solution containing a crosslinking agent and a catalyst, and carrying out crosslinking reaction to form a positively charged desalination layer on a surface of the polysulfone ultrafiltration base membrane; cleaning the membrane by using a solution containing an acid absorbent to remove sulfuric acid and glutaraldehyde which does not participate inthe reaction; removing water drops on the surface of the membrane, applying an oil phase solution, and allowing a large number of amine chain segments which do not participate in the cross-linking reaction on a surface of the positively charged desalination layer to react with polyacyl chloride in the oil phase to generate a polysulfonyl chloride desalination layer. According to the technical scheme, a thin polysulfonamide desalination layer can be obtained, meanwhile, the compactness of the polysulfonamide desalination layer can be improved by prolonging the reaction time without worrying about the influence on the flux due to the formation of an over-thick desalination layer, the problems that the reaction speed of polyamine and polyacyl chloride is low, and polyamine molecules penetrate through a loose primary desalination layer to diffuse to an oil phase such that a finally formed desalination layer is large in thickness and low in flux can be solved.

The invention provides a Bi1.5MgNb1.5O7 (BMN) multilayer dielectric film and a preparation method thereof, and belongs to the technical field of microelectronics. The preparation method provided by the invention comprises the following steps of mixing ammonium bismuth citrate, magnesium acetate tetrahydrate, niobium ethoxide and a citric acid aqueous solution, and carrying out a complexation reaction to obtain Bi-Mg-Ni precursor sol; carrying out deposition of MgO on the surface of a Pt (111)/Ti/SiO2/Si (100) substrate through a laser pulse deposition method, and obtaining an MgO seed crystallayer with the orientation being (111); coating the Bi-Mg-Ni precursor sol on the surface of the MgO seed crystal layer with the orientation being (111), and then carrying out annealing heat treatmentto obtain a single-layer film; repeating the coating and annealing heat treatment process on the single-layer film to obtain the BMN multilayer dielectric film with the orientation being (222).

The board has a cold plate including a projection plate (42) between intake and evacuation holes (70, 72). Rectilinear nozzles (86-90) traverse the plate through and through by following a projection direction. Length of each nozzle along the direction is higher than/equal to width of the nozzle perpendicular to the direction for forming coolant e.g. water, jets (100-104) along the projection direction. The projection direction of each nozzle forms an angle (alpha) with respect to a direction perpendicular to a base plate (78), where the angle ranges between minus 30 to plus 30 degrees.

The invention relates to an adapter for vacuum pumps, characterized in that it comprises an annular inlet flange (15) intended to be coupled to an outlet orifice of a chamber and an outlet coupling (16) comprising at least two cylindrical outlet through-housings (21) and forming an at least partial pump casing for the case (4) of a respective turbomolecular vacuum pump (3), said turbomolecular vacuum pumps (3) being intended to be received in a respective cylindrical outlet housing (21). The invention also relates to a pumping device, characterized in that it comprises an adapter for vacuum pumps (2) as described hereinabove and at least two turbomolecular vacuum pumps (3) housed at least partially in a respective cylindrical outlet housing (21).

According to the combined type circulating airflow separation equipment, the vibrating screen on the upper side of the circulating cavity can achieve preliminary screening of materials and clear away large and small impurities, meanwhile, the obliquely-arranged vibrating screen can enable screened materials to fall into the circulating box through gravity, energy can be saved, and the occupied area of the combined type circulating airflow separation equipment can be reduced; the power section provides a certain wind speed for materials to be screened, the rectification section rectifies airflow entering the winnowing section into uniform airflow, the situation that the separation effect is affected due to the fact that the materials interact with one another and a negative pressure area is generated in the winnowing section is avoided, the materials are evenly separated according to different specific gravities of the materials, and therefore the purpose of separation is achieved. The rotary air duct ensures the stability of air flow in the circulating cavity, and meanwhile, dust in the materials can be prevented from being directly discharged, so that environmental pollution is avoided; the device is simple in structure and small in occupied area, meanwhile, materials can be efficiently screened in a high-quality mode, and high applicability and universality are achieved.

The invention discloses a continuous drying device for polyester chips. The continuous drying device comprises a drying bin, a fixing frame, a fixing rod, a supporting frame, a power motor and the like. A fixing rod is fixedly connected to the bottom of the fixing frame, a supporting frame is arranged on the top wall of the drying bin, a power motor is installed in the supporting frame, a rotating shaft is rotationally connected into the drying bin, an output shaft of the power motor is connected with the rotating shaft, and a discharging frame is arranged on the top of the drying bin. The multi-layer drying structure is arranged in the drying bin, the polyester chips are rolled into the small polyester chips from the large bonded polyester chips, meanwhile, the polyester chips are continuously dried, water in the polyester chips is completely evaporated, and the drying efficiency is improved. And treating the moistened and bonded polyester chips into dry and mutually dispersed polyester chip particles.