938 results about "Laser etching" patented technology

The invention provides a printing piece defect detection method and system based on machine vision, and relates to the technical field of machine vision, and the method comprises the steps: determining an optimal detection scale through image enhancement processing, multi-scale gradient pyramid construction and mutual information calculation, extracting key points through a curvature value, and carrying out the shape discrimination. And finally, generating a laser etching compensation path based on defect characteristics and performing layered compensation processing. According to the method, the automobile part surface printing flaws can be accurately identified, the compensation strategy is adaptively generated according to the defect types, and the defect repairing precision and efficiency are improved.

The invention relates to the technical field of laser engraving, and discloses a laser engraving method and system capable of automatically correcting coordinates of a galvanometer and a camera, and the method comprises the following steps: calculating a target conversion coefficient based on a calibration size and a pixel size of an image collected by the camera, and controlling the galvanometer to perform laser etching on a cross mark on the surface of a PCB (Printed Circuit Board), recording origin data of a galvanometer coordinate system; adjusting the position of the camera to enable the cross center of the view of the camera to coincide with the cross mark, and calculating the coordinate offset; coordinate space transformation is carried out on all the points to be machined, and galvanometer marking coordinate data are obtained; after laser engraving is carried out on the galvanometer marking coordinate data, an engraving area image is collected, the position residual error and the size proportion deviation are calculated, laser engraving is carried out again, and a laser engraving result is obtained. The technical problem that the visual positioning coordinate and the galvanometer marking coordinate in the laser engraving system are not consistent is effectively solved.

The invention relates to the technical field of laser processing, and discloses a laser processing device and method suitable for TGV forming, and the method comprises the steps: S1, a glass substrate is scanned in a confocal manner, a three-dimensional topological graph is obtained, and the three-dimensional topological graph comprises the three-dimensional coordinate, the thickness gradient and the positioning mark of the glass substrate; s2, based on the three-dimensional topological graph, a through hole body is formed through ultraviolet femtosecond laser etching, and intermediate infrared laser is synchronously and dynamically controlled to etch the side wall of the through hole body to generate a taper through hole with a preset taper angle; and S3, the incident angle of the ultraviolet femtosecond laser is adjusted on the side wall of the taper through hole according to the three-dimensional topological graph, and a plurality of heat dissipation grooves are etched through the ultraviolet femtosecond laser. According to the laser processing device and method suitable for TGV forming, signal integrity optimization and active heat dissipation functions are achieved in the same through hole, the application range of the TGV is widened, and the stability of the TGV during use is improved.

The embodiment of the invention relates to the photovoltaic field, and provides a back contact cell and a manufacturing method thereof, a back contact laminated cell and a photovoltaic module, and the manufacturing method comprises the steps: providing a substrate with a first surface and a second surface which are opposite to each other, and the second surface comprises a first region and a second region which are alternately arranged along a second direction; forming a laminated structure comprising a tunneling layer, a doped polycrystalline silicon layer and a first protection layer which are stacked on the first region; forming an initial second passivation lamination layer which covers the second surface and comprises an intrinsic amorphous silicon film and a doped amorphous silicon film which are stacked; forming a second protection layer on one side, far away from the substrate, of the doped amorphous silicon film; etching the first region by adopting a first laser etching process; and taking the second protection layer on the second region as an etching barrier layer, taking the first protection layer as an etching stop layer, and removing the initial second passivation lamination layer or the second protection layer and the initial second passivation lamination layer remaining on the first region by adopting a first etching solution, thereby at least facilitating the improvement of the photoelectric conversion efficiency of the back contact battery.

The invention relates to the technical field of new energy power plant construction data processing, in particular to a construction site personnel track recognition system based on a two-dimensional code, which adopts laser etching to dynamically encrypt a two-dimensional code label, and improves the weather resistance of the label in a salt fog environment through a salt-dredging nano coating and antistatic packaging. And a double-fixing structure combining the elastic binding band and the magnetic fastener is suitable for high-strength operation scenes. Industrial-grade scanning base stations are deployed in a construction area in a gridding mode, three-dimensional coordinate data are captured through a multi-base-station cooperative scanning mechanism, high-reflection interference of photovoltaic panels is eliminated through a signal intensity difference algorithm, and a de-noising coordinate set is generated. The closed-loop calibration module corrects scanning angle offset and earth surface reflection weight parameters through a three-level check link, the environment adaptation module triggers an ultrasonic multi-frequency cleaning program to maintain optical performance, and the cooperative control unit adjusts the light supplementing intensity and the data fusion proportion in a linkage mode. Accurate identification of personnel tracks and multi-working-plane dynamic management and control in a complex environment are realized.

The invention discloses a dust removal mechanism and a dust removal method of an inverted laser etching machine for LOW-E glass, relates to the field of dust removal for LOW-E glass laser etching, and solves the problems of dust dissipation, interference between an air curtain and negative pressure airflow, poor adaptability of adsorption force and easy blockage of a filter membrane in the etching process. The mechanism comprises a dynamic sealing dust removal cover, an annular air curtain guiding module, a negative pressure dust collection module, a multi-stage filtering module, a composite adsorption positioning module and an intelligent control module. The method comprises six steps of pretreatment positioning, air curtain-negative pressure collaborative initialization and the like. According to the scheme, airflow interference is eliminated through an air curtain-negative pressure collaborative PID algorithm, an adsorption force two-factor adjustment algorithm is matched with glass characteristics, pre-dedusting is achieved through a dust concentration LSTM prediction algorithm, and the filtering efficiency is guaranteed by combining a multi-stage filtering module with a filtering membrane self-cleaning function; dust concentration can be effectively controlled, glass film layer damage is avoided, dedusting stability is improved, and filtering life is prolonged.

The invention provides a preparation technology of a three-dimensional camera shooting sonar sparse sensing array, and the method comprises the following steps: forming a patterned electrode on a PVDF or P (VDF-TrFE) piezoelectric film through vacuum adsorption and silk-screen printing according to sparse array element coordinates, and arranging a virtual transition array element at the periphery; performing laser etching on the edge contour and the exhaust hole of the piezoelectric film; designing a bonding positioning auxiliary tool, combining an ultrathin double-sided adhesive tape and a single-sided mask adhesive tape, and utilizing conductive silver paste to realize accurate electric connection between the array element and the PCB bonding pad; designing a polytetrafluoroethylene-metal flattening module, and laminating the array in a vacuum environment for curing and bonding; the matching layer is made of a low-impedance sound transmission material, glue filling and vacuum defoaming are performed from the back side in batches, and the sparse sensing array is prepared in combination with a polyimide film and a metal super-flat plate. The preparation problem of the large-aperture high-frequency imaging sonar on the sensing array is solved, and the array element position accuracy, the array element consistency and the imaging resolution can be improved.

The invention relates to the technical field of torque sampling inspection, in particular to a torque sampling inspection method and system. Comprising the following steps: tool identity digitization: performing laser etching on an encrypted two-dimensional code in a tool stress concentration area, and associating and storing tool specification parameters, detection standards and use constraint conditions to a central database; intelligent task allocation: the system generates a dynamic detection plan according to a production line real-time state, an equipment service cycle and an operator skill level; multi-source data acquisition: acquiring tool identity information through a scanning device, and synchronously acquiring a physical signal of a torque detection device and a digital image of a tool identification file; grading judgment processing: performing process conformity verification on the measurement data, and generating a process stability evaluation report in combination with historical detection records; according to the closed-loop control strategy, the detection scheme is automatically adjusted according to the quality fluctuation characteristics. According to the scheme, the problem that a traditional method is seriously insufficient in the aspects of detection efficiency, abnormal traceability, process control and the like can be solved.

The invention relates to the technical field of image processing, in particular to a laser etching label paper surface flaw detection method based on machine vision. The method comprises the following steps: acquiring a laser etching label paper surface image set A acquired in a historical etching time period; acquiring a defect identification result of each laser etching label paper surface image in A; for the defect identification result of any image in A, if the defect identification result comprises defects, comparing the identified defects with corresponding real defects, and obtaining the defects which are different from the corresponding real defects in the identified defects; if the ratio of the number of the different flaws corresponding to all the images in A to the number of the real flaws is larger than or equal to a preset proportion threshold value, the movement speed adjusting amount of the laser etching equipment is obtained according to the different flaws, and the target movement speed of the laser etching equipment in the current time period is obtained in combination with V0. According to the invention, the laser etching speed matched with the parameters of the image acquisition equipment can be determined.

The embodiment of the invention relates to the photovoltaic field, and provides a back contact cell and a processing method thereof, a back contact laminated cell and a photovoltaic module, and the processing method comprises the step of texturing a substrate. And carrying out boron diffusion on the substrate to form a boron-doped layer and a borosilicate glass layer on the surface of the substrate. And performing laser etching on the first region and the second region of the substrate, and removing the boron-doped layer, the borosilicate glass layer and part of the substrate in the first region and the second region. And carrying out phosphorus expansion on the substrate, and forming a polycrystalline silicon layer and a phosphorosilicate glass layer on the surface of the substrate. And performing laser etching on the substrate to remove the phosphorosilicate glass layers in the second area and the third area. And texturing the substrate and removing the phosphorosilicate glass layer in the first region and the polycrystalline silicon layers in the second region and the third region to form a textured surface in the second region. And forming a passivation layer on the substrate. Electrode paste is printed in the first area and the third area and sintered. And sintering the back surface of the substrate. The design can improve the double-sided rate and the efficiency of the back contact battery.

The invention relates to the technical field of capacitive screen processing, and discloses a method for processing a single-layer multi-point capacitive screen based on a laser etching mixed process, which comprises the following steps: executing a heat distribution modeling strategy on each position on the capacitive screen, calculating a heat source distribution function of each position, and calculating heat accumulation of each rectangular area; a correlation function of the area and heat accumulation of the rectangular area is established, division of the capacitive screen is optimized based on the correlation function, and the rectangular area is updated; for the pin on any rectangular area, triple design optimization is executed on the pin, and specifically, the position, connected with the rectangular area, of each pin is obtained; executing a first optimization strategy, and optimizing the connection position of the pin on the rectangular area; executing a second optimization strategy according to the width and the length of the cross section of the pin; and a third optimization strategy is executed on the rectangular area, so that the arrangement of the pins is optimized, the coupling effect is reduced, and the performance and the stability of the capacitive screen are remarkably improved.

The invention relates to the technical field of circuit board processing, in particular to a laser drilling method, a storage medium, laser drilling equipment and a high-frequency high-speed substrate. The laser drilling method comprises the steps that hole machining information of a hole structure is obtained, wherein the hole machining information comprises the hole position, the hole outer contour and the hole depth; taking the hole position as a positioning reference, and performing at least one of laser winding and cutting treatment and laser etching treatment on the high-frequency high-speed substrate to form a hole structure; wherein the laser winding and cutting treatment comprises the steps that first laser is controlled to move along a first closed path matched with the outer contour of the hole, so that the side wall of the hole structure is formed; and the laser etching treatment comprises the steps of controlling a second laser to carry out punching processing on an enclosed area of the outer contour of the hole so as to remove a base material in the enclosed area and form a bottom wall of the hole structure, and the method can be used for manufacturing the high-quality hole structure on the high-frequency and high-speed substrate and also can be used for manufacturing the high-quality hole structure on the high-frequency and high-speed substrate. And the processing efficiency of manufacturing a high-quality hole structure on the high-frequency and high-speed substrate can be obviously improved.

The invention discloses a focusing method of a laser, a focusing control device and laser etching equipment, and the focusing method of the laser comprises the steps: taking a current reference height as a starting point, and determining a plurality of different laser heights of the laser according to a current height adjustment step pitch; at each laser height, a laser device is controlled to form a plurality of light spots through laser etching, and the average diameter of the light spots corresponding to each laser height is determined; determining whether the laser height corresponding to the minimum light spot average diameter meets a preset focusing qualification condition or not; if not, the next reference height and the next height adjustment step pitch are determined according to the size relation of the light spot average diameters corresponding to the multiple different laser heights, and the steps are repeated till the laser height corresponding to the minimum light spot average diameter meets the preset focusing qualification condition. According to the technical scheme provided by the invention, laser focusing is accurately and efficiently completed, and the stability and improvement of the laser etching process quality are ensured.

The invention provides a laser polishing device combining gas protection and substrate heat dissipation and a using method. The device comprises a focus lens (1), a laser beam (2), a to-be-polished sample piece (3), a gas nozzle (4), a gas pipe (5), a high-pressure gas cylinder (6), a dust collector (7), a cooling liquid level (8), a metal substrate (9), an objective table (10), a water tank (11) and a laser (12). The invention further relates to a using method of the device. A micro-nano coarse structure is formed on the surface of the metal substrate through chemical etching, electrochemical etching or laser etching and the like, then a hydrophilic oxide layer is introduced through oxidation treatment or plasma treatment, and the super-hydrophilic performance of the metal substrate is further enhanced. The device has excellent liquid cooling capacity, gas protection performance and oxidation resistance, heat can be efficiently conducted and dissipated in the laser polishing process, the temperature uniformity of the surface of a sample is ensured, and overheating and oxidation phenomena are prevented.

The invention discloses an antifriction wear-resistant coating material and a preparation method and application thereof, and the preparation method comprises the following steps: cladding metal-based powder on a base material by laser cladding to obtain a laser cladding layer; the surface of the laser cladding layer is subjected to laser etching, and the laser cladding layer with a texture on the surface is obtained; powder is filled in the texture of the laser cladding layer with the texture, the texture is completely filled and leveled up by the filling powder, and the filling powder is melted by laser to form a solid layer, so that the antifriction and wear-resistant coating material is prepared. According to the method, on the basis of an original laser cladding coating, the self-lubricating coating is prepared in a texture pit through texture processing and a selective laser melting technology secondary processing and powder filling mode, so that the original phase, microstructure, density and wear resistance of the laser cladding coating are not influenced, and the self-lubricating coating is prepared in a self-lubricating coating pit; and the friction coefficient of the coating can be further reduced by virtue of the self-lubricating coating in the texture pit, so that the high-performance coating with wear-resisting and friction-reducing functions is prepared.

The invention discloses a laser etching current collector applied to a lithium metal negative electrode of a solid-state battery, and relates to the technical field of solid-state batteries. Concave holes are formed in the surface of the current collector; the diameter of each concave hole is 10-50 nm, the depth of each concave hole is 30-80 nm, and the distance between every two adjacent concave holes is 10-50 nm. The concave hole is obtained by etching the metal copper layer of the current collector through purple picosecond laser; the method can be applied to a lithium metal negative electrode of a solid-state battery, and specifically comprises the following steps: in a dehumidification environment, rolling a lithium strip and a laser etching current collector in a rubber roller press so as to form the lithium metal negative electrode taking the laser etching current collector as a middle interlayer; tests show that the current collector has good peel strength and battery coulombic efficiency, the technical effect that the current collector is provided with a carbon coating layer can be achieved, meanwhile, the problem of wrinkles existing in an existing current collector during rolling in the preparation process is solved, and the production yield is increased.

The invention discloses a back contact solar cell and a preparation method thereof, and relates to the technical field of solar cells. The back contact solar cell comprises a silicon substrate, first doped regions, second doped regions and isolation regions, the first doped regions, the second doped regions and the isolation regions are arranged on a first main surface of the silicon substrate, the first doped regions and the second doped regions are arranged alternately, and the isolation regions are located between the adjacent first doped regions and second doped regions; the tunneling passivation layer is arranged in the first doped region and the isolation region; the intrinsic polycrystalline silicon layer is arranged on the outer side of the tunneling passivation layer of the isolation region; the first doped polycrystalline silicon layer is arranged on the outer side of the tunneling passivation layer of the first doped region and comprises first doped atoms; the emitting electrode is arranged in the second doped region and comprises second doped atoms; the conduction types of the first doping atoms and the second doping atoms are opposite; the intrinsic polycrystalline silicon layer and the first doped polycrystalline silicon layer are located on the same layer. According to the embodiment, the influence of laser etching on the cell can be reduced, the preparation process is shortened, and the photoelectric conversion efficiency of the cell is improved.

The invention discloses a preparation method and application of a curable bacterial carrier bed, and relates to the technical field of sewage treatment. Comprising the following steps: mixing shell powder, kaolin and a pore-forming agent, adding water, granulating, rolling into spheres, air-drying, and performing primary sintering to obtain a porous light inner core; uniformly mixing nano calcium carbonate, silicon oxide sol, a binder and water to prepare slurry, spraying the slurry to the surface of the porous light core, imprinting a surface micro-well array through a mold, and then carrying out secondary sintering to obtain a ceramic-coated core; uniformly mixing titanium oxide sol and sodium alginate to obtain a bacteria-philic solution, dip-coating the bacteria-philic solution on the surface of the inner core coated with the ceramic, and forming a gel layer through ultraviolet curing; femtosecond laser etching capillary air channels penetrate to the core layer, the depth of each capillary air channel is 950-1050 microns, and the diameter of each capillary air channel is 180-220 microns; through the innovative combination of a ceramic multi-stage structure and an air touch regeneration mechanism, the problem of flora activity maintenance in fish tank sewage treatment is solved.

The invention discloses a production method of a square-meter-level perovskite cell module, and relates to a production method of a solar cell module, which is characterized in that a P4 laser etching edge cleaning process is changed into a P4 laser etching edge cutting process, so that positive and negative electrodes of a small-size perovskite cell are exposed, and the small-size perovskite cell is suitable for electrical connection; and then the small-size perovskite cell is connected in series and in parallel to achieve a large-size scale. Compared with the prior art, by changing the production process of the perovskite cell part, the perovskite cell part is suitable for electrical splicing, and then a plurality of small-size perovskite cell pieces are spliced and packaged in a series-parallel connection manner, so that a cell panel with a square meter size is obtained, and the perovskite cell has large-scale popularization and application values. The problems that a perovskite large-area thin film is difficult to prepare, the yield is low, and a large-size battery panel cannot be manufactured are solved.

The invention discloses an ultrathin PCD / PCBN (Polycrystalline Diamond / Polycrystalline Boron Nitride) composite sheet and an alternate lamination preparation process thereof, and the process comprises the following steps: preparing a PCD prefabricated body layer and a PCBN prefabricated body layer, and depositing gradient transition layers on the surfaces of the two prefabricated body layers respectively; processing a microstructure with a preset pattern on the surface of the gradient transition layer by adopting a laser etching technology, and filling the etched microstructure with a conductive material with high thermal conductivity; the PCD prefabricated body layers and the PCBN prefabricated body layers are alternately stacked and assembled, and interlayer bonding is completed through ultrahigh-pressure staged sintering; injecting a reinforcing phase into the microstructure of the interface of the sintered composite sheet through ultrasonic-assisted permeation so as to carry out interface reinforcing treatment; through the gradient transition layer and the laser etching microstructure, thermal expansion adjustment between multiple layers of composite sheets is achieved, the problems of thermal stress concentration and interlayer stripping are effectively relieved, meanwhile, through the high-thermal-conductivity filling material and reinforced phase permeation, the interface thermal conductivity and shear strength are improved, and the structural stability of the interface between the ultrathin composite sheets is achieved.

According to the special-shaped curved surface laser etching data self-adaptive blocking and track path optimization method, the size of a laser etching block is automatically adjusted according to the curvature radius change of a laser etching pattern, and it is guaranteed that the size of the laser etching data block is smaller than the maximum scanning range of a scanning galvanometer and smaller than the maximum scanning range of the scanning galvanometer; it is guaranteed that the arch height in the blocks is smaller than the focal depth of the etching laser beam, the maximization of the sizes of the blocks is achieved on the premise that the laser etching precision is guaranteed, and the laser efficiency is improved; for a certain laser etching data block, a laser etching track is optimized, so that the idle time of a scanning galvanometer is shortened, and the laser scanning etching efficiency is improved; different laser etching data are partitioned, the moving path of the five-axis moving mechanism is optimized, the idle time of the five-axis moving mechanism is shortened, and the overall efficiency of laser etching is improved.

The invention discloses a hardness sensor based on pressure and strain sensor co-integration and a preparation method, and belongs to the technical field of flexible hardness sensors. The hardness sensor comprises a lower packaging layer, a lower electrode, a lower strain sensor, a lower pressure-sensitive film, an upper pressure-sensitive film, an upper strain sensor, an upper electrode and an upper packaging layer which are sequentially arranged from bottom to top. According to the invention, the pressure-sensitive film is prepared by a template method, the electrode layer is adhered to the pressure-sensitive film through the adhesive, and then the redundant pressure-sensitive film is etched by laser to obtain the pressure sensor; and the strain sensor is obtained through laser etching and chemical plating. As the space utilization rate of the pressure sensor is not high, the strain sensor is embedded into the gap of the pressure sensor, so that the pressure sensor and the strain sensor are positioned on the same plane, the space utilization rate of the device is improved, the sensitivity and the response speed of the sensor are improved, and more accurate and efficient hardness detection is realized.

The invention discloses an aluminum wiring terminal, a wiring terminal unit and an assembling method, and the method comprises the steps: carrying out the laser etching of a joint surface of an aluminum conductive sheet, forming a pretreated conductive sheet with a micro-nano structure, depositing a protective coating on the joint surface, and carrying out the curing, and obtaining a conductive sheet with a protective coating. And then crimping and assembling with an insulating shell assembly to form a crimping assembly, and fixing bolts are arranged in the insulating shell assembly. Applying resonance fastening of characteristic frequency to a fixing bolt in the crimping assembly, injecting a lubricating medium in the fastening process, performing synchronous detection and verification of multi-physical field parameters on the fastening assembly, and feeding back detection data to a production control system to optimize assembly process parameters; the micro-nano structure is constructed on the joint surface of the conducting strip and the protective coating is deposited, so that the interface conductivity and oxidation resistance are remarkably improved, online detection and dynamic feedback optimization are integrated, and the consistency and reliability of the product are improved.

The invention belongs to the technical field of metallurgy, and particularly relates to a method for preparing an aluminum-iron composite material based on microtexture.The method comprises the steps that S1, an iron matrix is obtained and pretreated; s2, the iron matrix is placed in deionized water; s3, preparing a microstructure on the surface of the iron matrix; and S4, the iron matrix is adopted for liquid-solid composite casting to prepare the aluminum-iron composite material. On one hand, the micro-texture prepared in deionized water is more uniform, the roughness is reduced compared with that of the micro-texture prepared in air, and the wettability of an aluminum alloy melt when the aluminum alloy melt makes contact with an iron matrix is well improved; and on the other hand, when the micro-texture is prepared in the deionized water, the deionized water can effectively enable slag generated when the surface of the iron matrix is subjected to laser etching not to be deposited in the micro-texture any more, so that the interior of the micro-texture is more uniform and smoother, the filling rate of an aluminum alloy melt is effectively increased, and the problem of interface cracking after aluminum-iron bimetal solid-liquid compounding is solved.

The present application relates to the technical field of flexible sensor, and discloses a flexible large-strain sensor, a preparation method and application, aiming to solve the problems of small range, poor adhesion of traditional sensors in large-strain monitoring of solid engine grain and other soft materials, and poor signal linearity and repeatability, complex preparation process and high cost of existing flexible sensors. A polymer film is used to make a flexible insulating substrate; a conductive film is prepared on the flexible insulating substrate to form a composite film layer structure; according to a preset pattern of the conductive film, laser etching and scribing are performed on the conductive film according to a first type of vector track, only penetrating the conductive film, to divide out strain resistance and other resistance, forming an off-axis serpentine structure; according to a preset pattern of the flexible insulating substrate, laser etching and scribing are performed on the composite film layer structure according to a second type of vector track, penetrating the composite film layer structure, to etch out the flexible insulating substrate of the sensor; lead-out wires are welded on the lead-out electrodes and encapsulated to obtain the flexible large-strain sensor.

The invention relates to the technical field of building fire protection, in particular to an intelligent smoke exhaust device based on shape memory alloy and a smoke exhaust method.The intelligent smoke exhaust device comprises a window frame installed on a wall and a grating plate embedded into the window frame, and the grating plate is manufactured by laser etching of a shape memory alloy matrix with a preset crack pattern; and a heat reflection coating is arranged on the surface of the grating plate. When no fire occurs, the grating plate is in a sealed state, and no gap exists; when a fire disaster occurs, the indoor temperature rises rapidly, when the temperature rises to 90 DEG C and reaches the deformation temperature of the memory alloy, deformation begins, cracks are opened after the grating plate deforms, the preset cracks are distributed in a radial mode after being opened, a smoke exhaust channel is generated, and indoor smoke dust is exhausted. The method has the technical effects of high response speed and no need of manual reset.

The invention discloses an aluminum alloy and galvanized aluminum magnesium steel CMT dissimilar metal connection method. The method comprises the following steps that S11, a galvanized aluminum magnesium steel plate to be welded and an aluminum alloy plate to be welded are cleaned before welding; s12, laser etching is conducted on the surface of the cleaned zinc-aluminum-magnesium-plated steel plate, a surface microstructure is prepared, and the depth of the surface microstructure is smaller than the thickness of a plating layer on the zinc-aluminum-magnesium-plated steel plate; and S2, the galvanized aluminum magnesium steel plate with the surface microstructure and the cleaned aluminum alloy plate are placed in a lap joint mode, and welding is carried out. According to the method, the surface microstructure is prepared on the surface of the galvanized aluminum-magnesium steel plate, so that the coating restraint degree of the galvanized aluminum-magnesium steel surface is changed, the contact area of brazing filler metal and a base material is remarkably increased, the coating restraint stress of the surface of the base material is reduced, the flowing resistance of a molten pool is reduced, and the wettability is improved; the surface microstructure can promote evaporation of Zn in the coating and reduce the temperature of a molten pool, so that the thickness of an intermetallic compound is reduced, and the performance of a welded joint is remarkably improved.

The invention discloses a dental implant containing a bioactive surface and a preparation method of the dental implant, relates to the technical field of implants, and aims to improve the biological activity of the dental implant, perform multiple treatments on the surface of the dental implant, and form a microcosmic concave structure on the surface of the implant through sand blasting and laser etching to induce bone growth. Acid liquor and alkali liquor are used for treating the surface of the implant, active hydroxyl is introduced to the surface of the implant, the surface hydrophilicity is improved, and the reaction activity of subsequent reaction steps is improved; then, polyether-ether-ketone with antibacterial performance and hydroxyapatite with biological activity are further introduced into the surface of the dental implant, so that the biological activity of the dental implant is effectively improved.

The invention relates to the field of soil heavy metal pollution remediation, and discloses a heavy metal pollution soil remediation method based on a biochar loading technology, a biochar spiral chiral topological structure is constructed through femtosecond laser etching, a CdS quantum dot and graphene oxide composite layer is loaded, and the heavy metal selective adsorption and photocatalytic reduction ability is enhanced; a repairing agent is dynamically released in combination with a magnetic field response type microcapsule, multi-physics field parameters are optimized by utilizing a reinforcement learning algorithm, and accurate regulation and control of heavy metal migration-transformation-fixation are realized; an ultraviolet light triggered self-repairing mechanism is introduced to repair microcapsule damage, and pyrolysis oxidation and acid leaching processes are synchronously adopted to recover heavy metals and regenerate biochar. According to the invention, the defects of poor material selectivity, uncontrollable release and non-circulation in the prior art are overcome, and efficient targeted repair and resource recovery are realized.

The invention provides a perovskite solar cell, a preparation method thereof and electronic equipment, and belongs to the technical field of solar cells. The preparation method of the perovskite solar cell comprises the following steps: forming a first electrode on a substrate, and performing laser etching on the first electrode to form a plurality of first scribing lines; sequentially forming a hole transport layer, a perovskite light absorption layer and an electron transport layer between one side, deviating from the substrate, of the first electrode and the adjacent first scribing lines, and performing laser etching on the hole transport layer, the perovskite light absorption layer and the electron transport layer to form a plurality of second scribing lines; orthographic projections of the second scribing lines and the first scribing lines on the substrate are arranged at intervals; performing automatic optical detection on the film layer in each second lineation in the edge cleaning area, and judging whether the second lineation is normal or not according to the optical image of the film layer in the second lineation; and inputting a detection signal to the film layer in each second lineation in the edge cleaning area, and judging whether each second lineation is normal or not according to the color of the film layer in each second lineation.