116 results about "Multiple pass" patented technology

The invention discloses a pipeline all-position multi-layer multi-channel TIG welding bead morphology measuring device and method, and relates to the technical field of intelligent welding. A molten pool image collecting module is used for collecting morphology information of a molten pool, and the light emitting end of a laser transmitter is used for facing a welding bead; the active and passive vision module is used for collecting an image of light emitted by the laser emitter projected on a weld pool groove and identifying a weld bead corner opening position and a weld bead width, and the active and passive vision module and the weld pool image collecting module are both electrically connected with the control module; the control module can fuse image features collected by the active and passive vision module and the molten pool image collection module, the axes of the molten pool image collection module, the welding module and the active and passive vision module are located in the same plane, and the molten pool image collection module and the active and passive vision module are located on the two sides of the welding module respectively. According to the method, manual participation in the welding process can be reduced, the welding automation degree is improved, and meanwhile, the welding bead morphology measurement accuracy is improved.

The invention discloses a method for testing the filtering performance of a filter element under a simulated vibration working condition, which is characterized in that vibration parameters and filtering performance testing are combined for the first time through a test system by integrating a created vibration environment, so that the test environment is more vivid to an actual use scene, and the vibration effect of the filtering performance is synchronously and simultaneously detected; the device and the method help engineering technicians to improve the anti-vibration design of the filter element and master the filtering and purifying capacity of the filter element in actual use, provide reproducible verification support and a reliable scientific tool for actually evaluating the filtering performance and manufacturing quality of the filter element, and play a guiding role in promoting updating and upgrading of test standards in the filter industry.

The invention discloses a high-surface-quality invar alloy cold-rolled steel strip and a manufacturing method thereof.The manufacturing method comprises the working procedures of acid pickling, cold rolling and pre-pressing, coping, cold rolling and rolling, cleaning, annealing, leveling, shearing and packaging, the surface of an invar alloy hot-rolled steel coil is subjected to acid pickling through a mixed acid solution, cold rolling and pre-pressing are conducted through three-pass cold rolling and rolling, and the surface quality of the invar alloy hot-rolled steel coil is improved. At least three pairs of grinding heads are adopted for grinding, the grinding frequency is not less than 3 times, multi-pass cold rolling is carried out after grinding, the number n of rolling passes meets the condition that n is larger than or equal to 0.5 * m + 1, m is the thickness of the ground cold-rolled steel strip, and the unit is mm. According to the method, the technical problems that the surface quality of the invar alloy cold-rolled strip is difficult to control, the requirement is high and the like can be effectively solved, invar alloy products with high surface quality and high plate shape requirement are prepared, and the high-surface-quality use requirement of a user is met.

The invention belongs to the technical field of titanium welding wire preparation, and discloses a preparation method of a low-cost low-hydrogen titanium welding wire. The method comprises the following steps: preparing a titanium alloy wire rod; under the room temperature condition, multi-pass continuous cold drawing operation is conducted on the titanium alloy wire rod, a plurality of drawing dies are detachably installed on the same continuous drawing machine or a plurality of continuous drawing machines connected in series, so that a wire material continuously passes through the multiple drawing dies at a time to complete multi-pass deformation, and the wire rod is subjected to continuous cold drawing. The pass deformation of the multi-pass continuous cold drawing is designed to be a starting stage, a middle stage and a final stage, and the single-pass deformation of the starting stage and the single-pass deformation of the final stage are smaller than the single-pass deformation of the middle stage; in the middle stage process or after the middle stage process, on-line annealing treatment is carried out on the wire, and on-line annealing is carried out under argon protection; and the wire material subjected to online annealing treatment is subjected to polishing and lower breaking or close arrangement treatment, and a titanium alloy welding wire finished product is obtained. The titanium welding wire prepared through the method is low in hydrogen content, high in preparation efficiency and low in cost.

This application discloses a method and related equipment for online planning of welding gun posture for multi-layer and multi-pass external welding of pipelines. This method belongs to the technical field of intelligent welding and includes obtaining a laser line image and welding gun posture data of the pipeline welding groove; extracting characteristic pixel points from the laser line image; converting it into a three-dimensional point cloud by detecting a mathematical model and fitting it to obtain a three-dimensional welding groove diagram; using the three-dimensional welding groove diagram and welding gun posture data to calculate the welding groove size parameters, welding gun posture parameters, and the posture parameters of the workpiece to be welded, thereby determining the welding gun posture planning value; performing the current pass of filling welding along the welding groove according to the welding gun posture planning value, while simultaneously detecting and correcting the real-time welding gun posture value in real time; replanning the welding gun posture parameters during the return process; and after completing multiple passes of filling welding, controlling the welding gun to perform a cover weld on the welding groove to complete the pipeline external welding. It can be seen that this method can achieve better welding results.

The invention belongs to the technical field of friction stir additive manufacturing, and particularly relates to a method for eliminating a longitudinal gap between layers of a friction stir additive manufacturing component, which comprises the following steps of: assembling a stirring head on a main shaft of a friction stir additive machine, and starting a main machine, a wire feeder, a constant-pressure control system and a constant-temperature water cooling system of the friction stir additive machine; the stirring head is moved to the material adding starting point of the base plate, multi-pass deposition is conducted in sequence according to a set path, and a first layer of added materials is formed; the stirring head is lifted and moved to the material adding starting point of the second layer, material adding of the n layers is completed according to the set path, the deposition pass center line of the n layer deviates by a set distance relative to the deposition pass center line of the (n-1) layer, and a stirring needle of the stirring head can be inserted into the material of the (n-1) layer; by the adoption of the method, interlayer longitudinal gaps of the multi-channel and multi-layer additive component can be thoroughly eliminated, the Z-direction mechanical property is improved, a weak connection interface is avoided, the compactness of the component is improved, the production cost is low, and the efficiency is high.

The invention belongs to the technical field of rolling, and discloses a Ni / Al nano multilayer film electroplasticity and current-assisted ply rolling forming method. The Ni / Al multilayer film is an energetic material and is used as a brazing heat source and a welding flux. According to the method, millimeter-level Ni foil and Al foil serve as raw materials, the thickness ratio of all layers is determined according to the maximum self-propagating heat release amount, a six-roller precision rolling mill is used for conducting multi-pass electroplastic ply rolling under pulse current, the pass deformation is 60%, and electric pulse annealing is conducted after rolling (the temperature is lower than a reaction critical value), and the Ni / Al nanometer multilayer brazing thin film with the total thickness being 50 micrometers and composed of thousands of layers of nanometer thin films is prepared. The method overcomes the problems of low production efficiency, high cost, narrow application range and the like in the prior art, and compared with a magnetron sputtering method, the method is low in manufacturing cost, short in period, large in area and good in mechanical property; compared with an accumulative ply rolling technology, interface recombination is excellent, nickel layer breakage is light, and heat release is high; and the material is low in deformation resistance and good in plasticity, multi-layer film ply rolling forming property integrated forming is achieved, and industrial application is facilitated.

The present invention aims to disclose a processing process for ultra-thin calendered plain foil for electronic circuits, comprising the following steps: rolling a copper strip with a thickness of 0.15 mm to 0.2 mm through multiple passes to a first plain foil with a thickness of 6 μm to 20 μm; cleaning the first plain foil through two passes of a hydrocarbon degreasing agent solution; drying the cleaned first plain foil; and rolling the dried first plain foil through a wrinkle removal roller, wherein a first diagonal roller surface and a second diagonal roller surface are symmetrically arranged at both ends of the wrinkle removal roller, and the first plain foil is hood annealed to obtain a second plain foil. The beneficial effect is that the first plain foil is rolled after passing through the wrinkle removal roller, wherein the first diagonal roller surface and the second diagonal roller surface are symmetrically arranged at both ends of the wrinkle removal roller, and the middle part of the wrinkle removal roller is a smooth roller, and the wrinkled plain foil is flattened by the surface diagonal grooves of the first diagonal roller surface and the second diagonal roller surface, flattening is achieved while ensuring that most of the width of the ultra-thin calendered plain foil passes through the smooth roller, and the ultra-thin calendered plain foil is rolled up while eliminating wrinkles.

The invention relates to a weldless carriage bottom plate production process based on extrusion welding, and belongs to the technical field of extrusion welding, an aluminum alloy coiled material is firstly subjected to multi-pass rolling forming, wrinkling and cracking caused by one-time large deformation are avoided, a precision foundation is laid for follow-up triangular groove forming, then extrusion is conducted through a roller with a triangular cavity, and the weldless carriage bottom plate is obtained. Compared with a rectangular groove, the weldless compartment bottom plate solves the problems that lateral pressure resistance is weak and stress is easy to concentrate when a forklift forks, the pressure resistance is enhanced, a transition angle is formed in the third-pass sharp-corner finish roll extrusion forming process, the sharp-corner cracking risk is eliminated, and the service life of the compartment bottom plate is prolonged. The forking deformation resistance of the forklift is further improved; the top of the triangular groove is welded through laser welding, the problems that traditional welding has many defects and is low in strength are solved, defects such as air holes in a welding seam are reduced or closed through rolling operation after laser welding, residual stress is released, and the compactness of the welding seam is improved.

A method for controlling the structure uniformity of a large-size ultralow-expansion alloy bar comprises the following steps that (1) an ultralow-expansion alloy electroslag ingot with the diameter larger than that of the bar is heated to 1100-1130 DEG C, and heat preservation is conducted for 3-4 hours; (2) the heated electroslag ingot is subjected to multi-pass drawing-out and anvil forging rounding, and a cogging bar with the diameter being phi 330-phi 370 mm is obtained; (3) the surface of the cogging rod is subjected to sanding treatment, and then the cogging rod is fully coated with heat preservation paint; (4) the treated cogging rod is heated to 1050-1100 DEG C, and heat preservation is conducted for 2-3 hours; the upsetting ratio and the drawing-out ratio of the first time are controlled to be 1.3-1.6, the upsetting ratio of the second time is controlled to be 1.3-1.6, the drawing-out ratio is larger than 2.4, then rounding is conducted, a finished bar is obtained through water cooling, and (6) the radial thickness of the finished bar is removed by 10-20 mm through turning, and the finished large-specification ultralow-expansion alloy bar with the diameter being 230-250 mm is obtained.

An ohmic heater for the heating of a conductive fluid is comprised of a number of selectable electrodes, arrayed in such a way as to form a single pass-through from inlet to outlet. A series of flow conduits are provided to direct the flow across the faces of adjacent electrodes. The flow conduits are further configured such that the flow path makes multiple passes across the same adjacent set of electrode faces.

The present application relates to inkjet printing technology field, provide a jack shift inkjet printing method, inkjet vehicle includes multiple groups of nozzles, realize different color ink drawing, each group of nozzles includes multiple in Y direction on the arrangement, same color nozzle, nozzle is arranged into multiple rows in X direction, A nozzle and B nozzle are any two rows, the distance of A nozzle and B nozzle in Y direction is L, each nozzle includes multiple orifices, the distance of orifice in Y is delta, with a position on the printing platform as initial position, to solve the problem of improving graphic printing resolution in the premise of guaranteeing production efficiency and controlling printer cost in multiple PASS inkjet printing, the influence of color difference brought by different nozzles in printing process is reduced, the resolution of printing effect is improved by multiple coverage inkjet, the cost of using multiple groups of nozzles is reduced, the number of multiple PASS printing is reduced, and printing efficiency is effectively improved.

This disclosure provides a process for preparing fine-grained nickel-titanium shape memory alloy rods for medical use, comprising: forging a heated nickel-titanium alloy ingot through multiple passes, performing multiple high-temperature continuous rolling passes, and then performing thermomechanical treatment to obtain fine-grained nickel-titanium shape memory alloy rods. This invention, through a combination of specific multi-pass forging and strictly temperature-controlled high-temperature continuous rolling, utilizes a robust dynamic recrystallization mechanism to fundamentally refine and homogenize the austenitic matrix grains, and completely breaks down the continuous brittle Ti2Ni phase distributed along the grain boundaries into a randomly dispersed distribution, thereby obtaining fine-grained nickel-titanium alloy rods with high purity and excellent microstructure. This solves the practical problems caused by the coarse grains and brittle phase segregation of the original cast nickel-titanium alloy, such as easy intergranular fracture, difficult processing and forming, low yield, and poor fatigue life in medical applications.

The present application relates to a kind of metal matrix composite prepared by friction stir processing method, including the mixing of metal matrix composite reinforcement and substrate powder, according to the size of stir pin and shaft shoulder in the stir head of friction stir equipment, using milling cutter to open the groove on pure metal mold, the width is greater than the diameter of stir pin, the depth is greater than the length of stir pin;Reinforcement and substrate powder mixture is added to the groove and is maximized compaction, in the processing area of special friction stir welding machine, the center of stir pin of stir head is aligned with the center of groove, is prepared under the processing scheme of multiple passes variable stir head speed, obtains metal matrix composite at the groove of composite plate processing area, the obtained metal matrix composite reinforcement is uniformly distributed, and the mechanical and friction and wear performance is excellent.The present application can automatically prepare a variety of different kinds of metal matrix composite, without determining specific process parameters for different kinds of metal and reinforcement test, and is widely applicable.

The application relates to the technical field of heat sealing equipment, and discloses an inflating product processing heat sealing machine, which comprises a supporting table and a sliding frame, the supporting table is provided with a lifting table, the bottom of the lifting table is provided with an upper die, the sliding frame is slidably connected with a moving table, the moving table is connected with a lower die through an adjusting table, the adjusting table can adjust the angle and position of the moving table, a camera is arranged above the lower die, and the camera is connected with a visual positioning system. The inflating product processing heat sealing machine can roll and press the cloth through the extruding piece before heat sealing, can flatten the cloth, can reduce the probability of wrinkles near the weld, can discharge the air between the cloth layers, can avoid air gaps, can improve the heat sealing quality, can make the produced inflating product have good air tightness, and can stop at a predetermined position when rolling and pressing the cloth, can verify the positioning accuracy through physics and vision multiple times, and can improve the positioning reliability.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform a crest factor reduction on a radio frequency (RF) waveform in multiple passes, wherein the multiple passes each include: a clipping operation to reduce a peak-to-average power ratio (PAPR) associated with the RF waveform according to a threshold; and a filtering operation to remove at least a portion of out-of-band emission from the clipped RF waveform. The UE may transmit the RF waveform over a wireless channel, wherein the RF waveform transmitted over the wireless channel satisfies a spectral mask. Numerous other aspects are described.

The invention discloses a manufacturing method of an automobile high-strength steel part shaped like a Chinese character'ri 'based on laser rolling forming. The manufacturing method comprises the following steps that preparation work is completed; bending and forming the plate by using a robot; for the horizontally-arranged plate, the second end is sequentially bent vertically upwards, horizontally inwards and vertically downwards, so that the second end makes contact with the upper surface of the non-bent plate, and a closed rectangular pipe is formed; the first end is vertically and upwards bent and horizontally and inwards bent in sequence to form a C-shaped pipe, the first end makes contact with the outer surface of the bent position of the closed rectangular pipe, and closing is formed; laser filling wire fusion welding is carried out on the two connectors, and a closed pipe shaped like a Chinese character'ri 'is formed; and carrying out aerial fog shaping, cooling and straightening after welding. According to the manufacturing method, high-precision and low-resilience manufacturing of bumpers made of high-strength steel, ultrahigh-strength steel and light-weight materials can be achieved, the precision, strength and light-weight level of products can be improved, and meanwhile the industrial common problems that in a traditional technology, the number of passes is large, resilience is large, and energy consumption is high are solved.

An optical parametric multi-pass apparatus for generating laser radiation through optical parametric amplification or generation converts pump radiation into signal and idler radiation. It includes a multi-pass device with multiple mirror elements arranged to provide several beam paths from an input section to an output section of the device. The input section receives pump radiation, and the output section delivers signal radiation as the generated laser output. At least one optically nonlinear crystal is positioned within the device to enable the parametric process using the pump radiation. The mirror configuration ensures multiple passes of the beam paths through the crystal. The device is further designed to filter along the beam paths so that idler radiation is suppressed after at least one pass. A corresponding laser apparatus and method for generating laser radiation are also described.

The present invention discloses a thin-walled super duplex stainless steel combined groove welding process, belonging to the field of stainless steel welding technology, comprising the following steps: S1, processing a groove on the super duplex stainless steel joint to be welded, wherein the groove angle is 30°±2.5°, the blunt edge height is 0.5-0.8mm, the step length is 0.8-1.5mm, and a circular arc angle of R1-2mm is processed at the intersection of the blunt edge and the bevel edge of the groove; S2, assembling the super duplex stainless steel joints to be welded with the grooves; S3, welding is performed using tungsten inert gas arc welding in a pulsed manner; and S4, welding is performed using multiple layers and multiple passes. The present invention has a small welding torch swing during the bottom sealing process, and the groove angle can be well fused without large swing. The bottom sealing welding time is short, the operation is simple when using the groove, and a good root forming is easily achieved. The zero gap of the combined groove can effectively control the bottom sealing weld bead height on the back of the weld to be less than 1.5mm.

This invention discloses a method for preparing Nb3Sn graphene composite superconducting absorbing material, comprising: preparing an Nb-Sn-Gr composite film using the sol-gel method; coating the Nb-Sn-Gr composite film onto a TaTi alloy rod and then loading it into a SnCu alloy tube, which is then loaded into a CuNb composite tube and drawn through multiple passes to obtain an inner-tin Nb3Sn subunit; loading the inner-tin Nb3Sn subunit into a Ta tube; uniformly filling the outside of the Ta tube with nitrogen-doped porous graphene-coated copper powder; loading it into an oxygen-free copper tube; and drawing through multiple passes to obtain the Nb3Sn graphene composite superconducting absorbing material. The Nb-Sn-Gr composite film and nitrogen-doped porous graphene-coated copper powder in this invention enable the Nb3Sn graphene composite superconducting absorbing material to maintain intrinsic superconducting properties such as high critical current density and upper critical field, while also possessing stable and efficient electromagnetic wave absorption capabilities under low temperature and strong magnetic field environments.

The invention discloses a preparation method of a high-strength and high-conductivity lamellar heterogeneous copper-chromium-zirconium alloy, and belongs to the technical field of preparation and modification of copper alloy materials. According to the method, equal channel angular pressing (ECAP) and an accumulative ply rolling process are combined, CuCrZr alloy subjected to solid solution state and different passes of ECAP treatment is sliced, overlaid, fixed and subjected to one-time ply rolling, metallurgical bonding of the two layers of alloy is achieved, the steps are repeated on metal sheets subjected to ply rolling, accumulative ply rolling can be carried out multiple times, and finally annealing treatment is carried out again. According to the process, an ideal lamellar heterogeneous structure with alternate coarse and fine crystals can be obtained by controlling the size of crystal grains in each layer of alloy, meanwhile, the deformation far larger than that of common rolling can be obtained through multi-pass accumulative ply rolling, the crystal grains are refined to the nanoscale, meanwhile, the influence of a high-density crystal boundary on the electric conductivity is balanced, the tensile strength and the electric conductivity are synchronously improved, and the service life of the alloy is prolonged. The deformation aging process is far beyond the conventional deformation aging process.

The invention relates to the technical field of titanium alloy seamless tube manufacturing, in particular to a preparation method of a titanium alloy six-rib special-shaped seamless tube, which comprises the following steps of: a, mixing and pressing raw materials into a plurality of electrode blocks; b, the consumable electrode is smelted to obtain a titanium alloy cast ingot; c, the titanium alloy cast ingot is subjected to multi-heating-number upsetting and drawing forging and one-heating-number precision forging, and a titanium alloy bar is obtained; d, the obtained titanium alloy bar is annealed and then machined into an extrusion blank pipe; e, the cold-rolled blank pipe is subjected to multi-pass cold rolling to form an intermediate pipe blank; f, the middle pipe blank is subjected to drawing treatment, and a polished pipe is obtained; g, cold rolling the polished tube into a semi-finished special-shaped seamless tube; and h, the special-shaped seamless pipe semi-finished product is sequentially subjected to acid pickling, abrasive particle flow and annealing treatment, and the finished titanium alloy six-rib special-shaped seamless pipe is obtained. The preparation method can effectively improve the yield of the titanium alloy ribbed special-shaped seamless pipe, and is beneficial to large-scale use.

A multiple pass self-cinching suture construct includes a strand of suture material. A fixed loop is formed at one end, and an adjustable loop is formed at the opposite end. A self-cinching section is disposed between the fixed loop and the adjustable loop. The self-cinching section includes a first pass of a tag end axially through the interior of the self-cinching section to form the fixed loop. The opposite tag end passes axially through the interior of two co-axial suture segments inside the self-cinching section, forming an adjustable loop. As the adjustable loop tag end is pulled, tension is applied and the self-cinching section constricts to maintain tension. In some embodiments, the self-cinching section includes at least four segments of the strand of suture material co-axially aligned along the self-cinching section.

The mass spectrometer includes a storage device and an analyzer. The analyzer includes a mirror, an accelerator that receives ions from the storage device and pulses them onto one of the mirrors, causing the ions to reflect back and forth in a first dimension between the mirrors as the ions drift in the drift dimension, a reflector that reflects the ions in the drift dimension, a detector, and control circuitry that activates the reflector to make multiple passes along the drift dimension and deactivates one of the reflectors so that the ions pass to the detector and can be detected, the timing of the reflector activation and deactivation being such that only ions within a first range of mass-to-charge ratios undergo the same number of passes in the drift dimension at any one time that they are detected by the detector. The control circuitry synchronizes the time of pulses from the storage device with the time of pulses from the ion accelerator so that only ions having a mass-to-charge ratio within the first range are pulsed onto one of the mirrors by the accelerator.

The application discloses a method for preparing ultra-fine grain Ti-6Al-4V titanium alloy. The method comprises the following steps: pretreating a coarse grain Ti-6Al-4V titanium alloy plate, processing the plate into a square block with a specific proportion, and performing surface smoothing treatment. Then, forging deformation is performed through multi-directional isothermal closed-die forging, the forging direction, the pressure and the deformation pass are controlled, and the mixed crystal Ti-6Al-4V titanium alloy with an ultra-fine grain structure is prepared. After the forging, the sample is subjected to surface cleaning treatment, and is prepared for rolling at a proper rolling temperature, and the thickness of the sample is reduced through rolling in multiple passes. Finally, the obtained ultra-fine grain Ti-6Al-4V titanium alloy has the following characteristics: the maximum grain size is less than 5 microns, the average grain size is less than 1 micron, and the proportion of grains with a size of 1 micron or less is more than 75%. The method effectively improves the uniformity of the material structure, prolongs the service life of the die, optimizes the process efficiency and surface quality control, and significantly improves the mechanical properties of the material, and provides a new technical approach for the preparation of titanium alloy materials.

Sampling optics for spectroscopic analysis include an array of optical elements as opposed to a single objective as used in conventional systems, achieving enhanced collection, inherent signal integration / averaging and improved measurement uniformity. At the same time, the etendue using the array is substantially the same as the etendue using a single-element objective. The array of closely packed optical elements may have spherical or aspherical surfaces and may be transmissive or reflective. An array of lenses and reflective elements may be arranged together in flow cell configurations and / or for signal amplification involving multiple passes through a sample medium. The array elements may be arranged in hexagonal, linear, radial or other packing geometries and may be implemented as a flat or curved panel. The present disclosure is applicable to remote fiber probes and flow cell geometries to measure solids, liquids, gasses and semi-liquid such as slurries.

This invention relates to the field of superconducting material processing technology, specifically to a method for preparing Nb3Sn superconducting wires. The invention mainly involves inserting an Nb-Zr alloy into the exterior and / or center of a Sn-Cu single-core rod, filling the space between the Nb-Zr alloy and the Sn-Cu single-core rod with oxide powder, and then inserting it into a copper substrate. After multiple passes of stretching, forming, and length-cutting, Nb3Sn sub-components are obtained. These Nb3Sn sub-components are then uniformly arranged circumferentially within a copper tube to form a bundle, followed by multiple passes of stretching, heat treatment, and cutting to obtain the Nb3Sn superconducting wire. This invention enhances the critical current density of the Nb3Sn superconducting wire under high magnetic fields of 8T–16T by introducing an artificially pinned array with a density gradient distribution. This solves the problem of the matching effect produced by existing uniform artificially pinned center schemes, which limits the practical application of superconducting wires, and alleviates the decrease in critical current density of Nb3Sn superconducting wires under high fields.

The invention discloses a preparation method of a loose body based on an optical fiber preform, and relates to the technical field of optical fiber processing. The method comprises the following steps: SS01, depositing a barrier layer by adopting an MCVD (modified chemical vapor deposition) process; sS02, multi-time deposition of a loose core layer is conducted through the MCVD deposition technology; sS03, preparing a doping solution containing rare earth ions and aluminum ions; sS04, off-line solution doping is carried out, and a vacuum pressurization alternate driving mode is adopted in the doping process. The porosity of the loose core layer is gradually reduced from inside to outside, a permeation resistance gradient is formed, the high porosity of the inner layer provides sufficient permeation channels, the low porosity of the outer layer plays a role of a barrier layer, rare earth ions are prevented from being adsorbed by the surface layer too early and exhausted in the doping process, and the rare earth ions are prevented from being adsorbed by the surface layer too early and exhausted through the forced permeation effect of vacuum pressurization alternate driving. Dissolved gas is discharged through vacuumizing operation after each stage of pressurization, space is vacated for next-stage permeation, and the rare earth ions are evenly distributed in the radial direction of the loose body.

The application discloses a kind of based on non-interacting polarization multiplexing multi-path pulse compression device and method, it is related to ultrafast laser technology and nonlinear optics field, device includes: first polarization beam splitter, Faraday rotator, second polarization beam splitter and dispersion compensation module, dispersion compensation module is used to make pulse multiple pass through same dispersion compensation element and form return pulse, return pulse is converted into polarization state orthogonal with incident state by Faraday rotator after by first polarization beam splitter output. By Faraday non-interacting coaxial architecture, pulse keeps high-efficiency polarization matching, reduces astigmatism, spatial chirp and energy loss caused by off-axis folding, and when target dispersion amount is certain, optical envelope volume is reduced, and element light aperture requirement is reduced;While pulse compression and reverse light isolation are integrated in the same magneto-optical component, reduce the number of discrete components, improve system compactness and stability.

The application discloses a kind of insertion point printing deviation detection method, device, equipment and storage medium, it is related to ink-jet printing technical field.The method is by printing first detection diagram on printing medium to obtain the second detection diagram for detecting whether insertion point printing exists deviation;Wherein, first detection diagram includes first detection part and second detection part, first detection part includes a plurality of first detection lines arranged in ladder shape along first direction, and second detection part includes a plurality of second detection lines arranged in ladder shape along second direction;Second detection diagram obtained according to first detection diagram can quickly detect and obtain insertion point deviation value or step distance deviation value in insertion point printing in ink-jet head, insertion point printing between ink-jet heads or multiple Pass insertion point printing, and moreover, the insertion point deviation value obtained can be accurate to within decimal pixel, greatly improve the precision of detection, user can quickly and accurately correct insertion point deviation or step distance deviation according to second detection diagram, to improve image printing precision and quality.