740results about How to "Reduce reflection" patented technology

The invention discloses a polishing device of a hub surface defect detection system, which comprises a front polishing mechanism for polishing when acquiring a front image of a hub, a side polishing mechanism for polishing when acquiring a side image of the hub, and a back polishing mechanism for polishing when acquiring an inner cavity image of the hub, the front lighting mechanism comprises a first light source and a plurality of area light sources, all the area light sources define a containing cavity for containing the first light source and the first camera, the first light source is a strip-shaped combined light source, and the first light source and the first camera are controlled by the robot to move. According to the lighting device of the hub surface defect detection system, the surface light source fixedly installed on the front face provides uniform background lighting, uniform light distribution is ensured, and reflected light and shadows are reduced; the strip-shaped combined light source can adjust the lighting position and posture along with the robot, the lighting requirements of different positions, different angles and different defects can be met, and the hub surface image collection quality and the defect detection accuracy are improved.

The invention relates to the technical field of grouting simulation tests, in particular to a test device and method for simulating dynamic water condition composite stratum tunnel grouting, and the test device for simulating dynamic water condition composite stratum tunnel grouting comprises a model box, a water storage tank, a single-ring duct piece, a dynamic water simulation system, a grouting system and a data acquisition and analysis system; the model box is filled with a permeable medium, the single-ring duct piece is arranged in the permeable medium, the grouting system is connected with the single-ring duct piece, and grouting slurry is colored; the dynamic water simulation system comprises a water supply system and a drainage system, the data acquisition and analysis system is arranged on one side of the model box and used for acquiring and analyzing the state of grouting slurry in the model box, and the problem that grouting and seepage conditions of different seepage fields cannot be visually observed and simulated in a traditional grouting test is solved. The seepage field grouting simulation test is simplified, and the seepage field grouting effect in the pore stratum cannot be effectively researched.

The invention belongs to the field of electrical electronics and advanced non-ferrous metal additive manufacturing, and particularly relates to a preparation method of a laser additive manufacturing copper alloy-tungsten copper composite electrical contact, which comprises the following steps of: preparing a nickel or nickel alloy coating on a copper alloy base material by adopting coaxial powder feeding laser cladding to serve as a middle layer, and then preparing a tungsten copper coating by laser cladding to obtain the copper alloy-tungsten copper composite electrical contact. The composite electrical contact is composed of a pure copper or copper alloy base material layer, a pure nickel or nickel alloy coating and a tungsten copper coating in sequence. The electrical contact obtained by the invention has relatively high electrical conductivity and thermal conductivity, and also has good arc ablation resistance; the copper alloy-tungsten copper electrical contact is prepared by adopting the laser cladding technology, so that the production cost can be effectively reduced, the production efficiency is improved, meanwhile, later maintenance and repair are facilitated, and the method is green and environment-friendly.

The invention discloses a TOPCon battery capable of reducing UV attenuation and a preparation method thereof, and belongs to the field of TOPCon batteries, the TOPCon battery comprises a silicon substrate, and three silicon nitride layers / two silicon oxynitride layers / one silicon oxide layer are sequentially deposited on the front surface of the treated silicon substrate to form a front surface antireflection layer; and depositing three silicon nitride layers on the back of the silicon substrate to form a back antireflection layer. The polycrystalline solar cell has the advantages that three silicon nitride layers / two silicon oxynitride layers / one silicon oxide layer are arranged on the front face of the silicon substrate to serve as the front face antireflection layer, the color stability is high, the surface of the silicon substrate can be better passivated, light reflection can be better reduced, the open-circuit voltage and the short-circuit current of the polycrystalline solar cell are improved, and the service life of the polycrystalline solar cell is prolonged. Therefore, the photoelectric conversion efficiency of the polycrystalline solar cell is effectively improved.

The invention relates to the technical field of photovoltaic cells, and discloses a back contact solar cell and a preparation method thereof. The preparation method comprises the following steps: providing a substrate layer of a first conductive type having a first surface and a second surface opposite to each other; a first groove is formed in the first surface, and a bulge is formed beside the first groove; performing doping treatment on the inner wall surface of the first groove to form a first doping layer; the first doped layer is of a second conductive type; forming a passivation layer on the surface of the first doping layer; a second groove isolated from the first groove is formed in the protrusion; forming a first tunneling oxide layer on the second groove; forming a second doping layer of the first conduction type in the second groove and on the first tunneling oxide layer; a first electrode and a second electrode are formed, the first electrode penetrates through the passivation layer to be connected with the first doping layer, and the second electrode is connected with the second doping layer. The first groove and the second groove which are relatively isolated are formed by grooving at different positions of the substrate layer, so that efficient current collection is facilitated, short circuit is prevented, and the photoelectric conversion efficiency and the power generation efficiency are improved.

The invention relates to the technical field of railway line flaw detection, in particular to railway line automatic comprehensive flaw detection equipment which comprises two steel rails and a flaw detection car and further comprises a C-shaped mounting plate, a buffer assembly, a waist detection mechanism and a bottom detection mechanism. A first fixing rod is transversely arranged in the C-shaped mounting plate, fixing sleeves are slidably connected to the two ends of the first fixing rod correspondingly, and balance assemblies are arranged at the ends, away from each other, of the two fixing sleeves correspondingly. The device has the advantages that different detection assemblies are arranged for different detection areas, so that steel rail detection of different parts is more efficient and accurate, it is ensured that different types of defects can be detected, the detection period is shortened, the balance assembly and the buffer assembly cooperate with each other to enable the head detection assembly to keep a dynamic balance state, and the detection efficiency is improved. The probe is effectively protected from vibration damage, and the adaptability of the probe to the change of the steel rail and the detection stability of the probe are improved.

The utility model relates to the technical field of building materials, in particular to an assembly type PC wallboard structure which comprises two butt-joint openings symmetrically formed in the bottom end of a wallboard body, two clamping plates are symmetrically arranged in the butt-joint openings, sliding columns in sliding connection with the wallboard body are fixedly connected to the side walls of the two clamping plates, and the side walls of the two clamping plates are fixedly connected with the bottom end of the wallboard body. The top of the wallboard body is symmetrically and fixedly connected with one ends of two connecting columns. According to the wall board, the two T-shaped blocks on the top of the wall board body are inserted into the grooves in the bottom end of the other wall board body, when the T-shaped blocks abut against the inclined plane portions of the clamping plates in a sliding mode, the clamping plates can abut against the two sides by a certain distance, and then the clamping plates are rapidly reset under extrusion of the reset springs; the T-shaped block can be clamped and positioned through the two clamping plates, so that the T-shaped block can be limited through the butt joint opening in the bottom end of the wallboard body and the cover plate, the PC wallboard can be quickly assembled, and the assembling efficiency of the PC wallboard is improved.

The invention relates to the technical field of PCBs, in particular to a method and system for automatically adjusting the line spacing in PCB design and computer equipment. According to the invention, crosstalk between the adjacent signal lines is effectively reduced by reasonably adjusting the distance between the component and the signal line, impedance matching of the signal lines is better controlled by considering electrical characteristic information, and the line distance in PCB design is adjusted by obtaining the characteristic information of the component, so that the impedance matching accuracy of the signal lines is improved. The interference is reduced, the signal integrity is improved, the electrical performance and the reliability are improved, the crosstalk between the signal lines is effectively reduced by calculating the actual distance between the reference line segment and the component pin, the impedance of the signal lines can be ensured to be matched with the component by considering the pin characteristics and the electrical characteristics, and the reliability of the component is improved. Through accurate analysis of the size and characteristics of the middle line segment group, crosstalk between adjacent signal lines can be effectively reduced, coupling of an electromagnetic field can be reduced through a reasonable line spacing, and the definition of signals is ensured, so that the signal transmission efficiency is improved, and the reflection phenomenon is reduced.

The invention provides a molybdenum-based oxide sintered body, a sputtering target material containing the sintered body, and an oxide thin film formed by the sputtering target material. In the present invention, a specific dopant is added to a molybdenum oxide and a niobium oxide that are difficult to sinter in a prescribed content range, and it is possible to simultaneously ensure improved sinterability, high density characteristics, and uniformity, low reflection, and low resistance characteristics of a thin film obtained by controlling particle growth even if pressureless sintering is performed.

The invention relates to the technical field of vibration and noise reduction of shock tube testing devices in the engineering anti-explosion industry, in particular to a gradient design type shock tube vibration and noise reduction device for engineering. Comprising a shock tube, an injection silencing module and a vibration and noise reduction module. The shock tube is connected with the injection silencing module; the vibration and noise reduction module is connected with the injection noise elimination module; the shock tube, the injection noise elimination module and the vibration and noise reduction module are coaxially arranged. According to the gradient design type shock tube vibration and noise reduction device for engineering, airflow and sound wave propagation paths are optimized through gradient design, so that noise and vibration generated in the working process of the shock tube are effectively reduced, and meanwhile the aerodynamic performance and operation efficiency of the shock tube are kept. The vibration and noise reduction module formed by periodically arranged functional units forms an acoustic black hole structure, compared with a traditional method, the acoustic black hole structure has better acoustic and elastic wave control physical characteristics, the propagation speed of shock waves can be effectively reduced, and reflection at the tail end of a boundary is reduced.

The invention relates to the technical field of wave-absorbing materials, and discloses a lightweight high-entropy perovskite wave-absorbing material and a preparation method thereof, and the lightweight high-entropy perovskite wave-absorbing material is a high-entropy perovskite oxide. The chemical formula of the high-entropy perovskite oxide is Srx (AyMnyCryByCy) O3, x is equal to 1 to 3, and y is equal to 0.2 to 0.6; a, B and C are selected from any three of Fe, Co, Ni, Ti, Zn, Cu, Zr, Ga, Sn, Yb, Eu, Mo, Rh and Ru. According to the invention, the light high-entropy perovskite oxide is synthesized at a low temperature by using a one-step firing process and adopting a pure oxide as a raw material through proper doping elements and firing temperature. The high-entropy synthesized half-shell hexagonal prism high-entropy perovskite oxide structure with the large length-diameter ratio is beneficial to multiple reflection of electromagnetic waves in the material, reflection is reduced, the wave absorbing performance is improved, and the application range of the high-entropy perovskite oxide is expanded.

The invention discloses a solar single-crystal efficient TOPCon + SE battery piece ultrahigh sheet resistance diffusion process which mainly comprises a front boron process, an SE process and a rear oxidation process, and the front boron process comprises high-temperature oxidation before diffusion and a diffusion process composed of three-step diffusion and heating propulsion. According to the invention, a layer of SiO2 can be coated on the surface of the silicon wafer through high-temperature oxidation before diffusion and is used as an anti-reflection film layer; the PN junction is prepared by adopting a step-by-step diffusion method, so that the advantage of good junction uniformity can be realized, boron can be uniformly distributed on the surface of a silicon wafer through a specific boron diffusion method, and meanwhile, boron elements can be better deposited on the surface of the silicon wafer through variable-temperature diffusion and propulsion; by adding the SE process, the square resistance can reach 700-800 ohms, the junction depth in the grid line area is deeper, the increase of ohms becomes better, the cell center recombination is reduced due to the lower surface concentration, and the open-circuit voltage of the cell is improved; and the post-oxidation process has an annealing effect and can repair lattice damage and the like.

The invention discloses a radio frequency connector and a connector combination. The radio frequency connector comprises an insulating base and at least one central conductor assembly. The center conductor assembly includes an inner conductor, an insulating support, an inner shielding ring, and an outer conductor. The inner shielding ring is arranged on the outer peripheral surface of the insulating support member. The outer conductor surrounds the insulating support member, and an annular insertion space is formed between the outer conductor and the inner shielding ring and is used for inserting an outer shielding shell of a butt joint conductor assembly of a butt joint connector into the annular insertion space. The radio-frequency connector and the connector combination are particularly suitable for transmission of high-frequency signals, and the transmission frequency can reach 20 GHz.

The invention relates to the technical field of cables, and discloses a long-life photovoltaic cable which comprises a conductor, an insulating layer arranged outside the conductor and a sheath layer arranged outside the insulating layer, the conductor is formed by stranded tinned copper wires, the surface of each copper wire is covered with a layer of tin, and the sheath layer is arranged outside the insulating layer. Both the insulating layer and the sheath layer adopt a flame-retardant halogen-free polyolefin material with at least temperature resistance as a base material, the content of carbon black in the sheath layer is greater than%, and the materials of the insulating layer and the sheath layer are subjected to an irradiation crosslinking processing procedure. The invention aims to provide the long-life photovoltaic cable which is temperature-resistant, aging-resistant, acid and alkali-resistant, flame-retardant and excellent in ultraviolet-proof performance.

The invention provides anti-scattering water-guided laser cutting fluid as well as a preparation method and application thereof. The anti-scattering water-guided laser cutting fluid comprises the following components in parts by weight: 0.1-1 part of an anti-scattering agent; 0.01 to 0.1 part of a foam discharging agent; 1-5 parts of a refractive index regulator; and 80-99 parts of ultrapure water. The anti-scattering agent is a polymer; the foam removing agent is one or more of hydroxymethyl cellulose, hydroxy propyl cellulose, sodium lignin sulfonate, potassium lignin sulfonate and naphthalene sulfonic acid formaldehyde condensate sodium salt; the refractive index regulator is an iodine-containing compound and / or a fluorine-containing compound. According to the anti-scattering water-guided laser cutting fluid, light beam scattering and energy loss in the water-guided laser cutting process can be remarkably reduced, and the cutting precision and efficiency are improved. The anti-scattering water-guided laser cutting fluid has very good application prospects and large-scale industrial popularization potential in the field of water-guided laser cutting.

The invention discloses a semiconductor packaging quality visual inspection device which comprises a machine body, a conveying mechanism and an industrial camera, the conveying mechanism and the industrial camera are installed on the machine body, and a rotary plate is rotationally connected with a lampshade; a sliding connection frame and a telescopic rod for controlling the sliding connection frame to move are arranged on the lamp tube, and a transmission part corresponding to the rotating plate is arranged on the outer side of the rotating disc; an electric control part for controlling the side cylinder to rotate is arranged on the frame rod, and a pressing structure for limiting the lampshade from being unfolded relative to the rotating plate is arranged on the side portion of the side cylinder. According to the invention, through the design of the rotary disc and the rotary plate, multi-color LED light sources can be conveniently integrated, switching of the light sources of various colors is realized, the visibility of specific characteristics can be enhanced through the optical filters of different colors, the detection accuracy is improved, and through the cooperative design of the sliding connection frame and the abutting groove, it is ensured that when the lampshade is opened and aligned with the lamp holder of the lamp barrel, the light sources of various colors can be conveniently switched. The device can be accurately fixed outside a light source, avoids light leakage, and ensures that the background of a detected image is clear.

The invention discloses a method for manufacturing a circuit board with a pad-free design, and the method comprises the following steps: S1, a circuit board processing selection step: integrating and putting the circuit board into processing equipment, and selecting a processing route according to a required processing mode; and S2, targeted circuit board processing is conducted, specifically, two sets of circuit board processing technologies are arranged, one set of circuit board processing technologies is a vacuum hole plugging technology, the other set of circuit board processing technologies is a graph electrotinning technology, and the circuit board is transferred and conveyed out after the processing technologies are selected according to needs to process the circuit board. Two groups of different systems are set to complete processing of the circuit board, specific processing requirements are met according to the required processing process, and compared with a traditional manufacturing method of reserving a bonding pad, the circuit board without the bonding pad design manufactured by the process saves a large amount of wiring and hole arrangement space and can support closer hole-to-wire or hole-to-hole distance; the non-pad design can reduce the reflection of the non-functional pad to the signal in the signal transmission process, reduce the loss of the signal, and improve the integrity of the signal.

The invention discloses an anti-reflection temperature-control photovoltaic panel coating and a preparation method thereof. The anti-reflection temperature-control photovoltaic panel coating is prepared from the following components: 146 to 156 parts of segmented copolymer, 230 to 245 parts of double-layer shell hollow nano particles and 15 to 17 parts of aminopropyl trimethoxy silane, the block copolymer is a triblock copolymer of 48-52 parts of thiolactone acrylamide, 90-94 parts of perfluorooctyl ethyl acrylate and 8-10 parts of methyl methacrylate, the inner layer of the double-layer shell hollow nanoparticle is indium tin oxide, and the outer layer of the double-layer shell hollow nanoparticle is silicon dioxide. The coating provided by the invention can improve the light transmittance, also significantly enhances the heat dissipation performance of the photovoltaic panel, and significantly improves the power generation efficiency of the photovoltaic panel.

The invention provides a diamond mid-infrared optical window with an anti-reflection microstructure and a preparation method of the diamond mid-infrared optical window, belongs to the technical field of optical material preparation, and aims to solve the technical problem of low light transmittance of an infrared optical window of a diamond base material. The infrared optical window comprises a diamond substrate, wherein at least one surface of the diamond substrate is provided with an anti-reflection microstructure; the anti-reflection microstructure is a quadrangular frustum pyramid arranged in a two-dimensional matrix. The preparation method comprises the following steps: (1) carrying out horizontal grating processing on the surface of the diamond surface substrate by using femtosecond laser, and then carrying out laser cleaning; (2) performing vertical grating processing on the surface of the diamond substrate by using the femtosecond laser again; (3) the diamond substrate obtained in the step (2) is put into a mixed acid solution for wet etching, and a graphite layer on the surface of the diamond substrate is removed; and (4) annealing the diamond substrate to obtain the diamond substrate with the anti-reflection structure. The average transmittance of the diamond optical window with the anti-reflection structure at the infrared 10-12 [mu] m position reaches 93% and is improved by 23%, and the highest transmittance reaches 94.5%.

The invention belongs to the technical field of photovoltaic panel frames, and particularly relates to a photovoltaic panel frame with an automatic light-chasing structure, which comprises a bottom plate and a connecting ring plate, the upper side of the bottom plate is movably connected with the connecting ring plate through a bearing, a support plate I is fixed on the upper side of the connecting ring plate, and the lower side of the support plate I is fixed with one end of a bracket. According to the photovoltaic panel frame with the automatic light-chasing structure, the driving motor is started, the sleeve can move downwards along the screw rod, the photovoltaic panel body can adjust the sunlight irradiation receiving angle along with the east rise of the sun, when the sleeve continuously moves downwards, the sunlight irradiation receiving direction of the photovoltaic panel body is adjusted, when the sun falls in the west, the screw rod rotates reversely, and the sunlight irradiation receiving angle of the photovoltaic panel body is adjusted. The photovoltaic panel main body can adjust the sunlight irradiation receiving angle along with the sun, so that the angle and direction of the photovoltaic panel frame can be adjusted according to the rising and falling of the sun, the power generation efficiency is improved, and higher energy output is realized.

The invention relates to an antireflection polymer film with a lead ion sealing function for a perovskite cell, and preparation and application thereof, and belongs to the technical field of perovskite solar cells. PVA and water are mixed and heated to be dissolved, and a transparent and clear PVA solution is obtained; the preparation method comprises the following steps: sequentially adding a phosphoric acid solution, dibasic phosphate and a transparent plasticizer into a PVA (Polyvinyl Alcohol) solution under continuous heating, respectively reacting for more than 1 hour, pouring the obtained modified polymer solution on a substrate with a micro-nano structure, and naturally curing and stripping to obtain the antireflection polymer film PFPF with lead ion sequestration. When the PFPF is applied to the light receiving surface of the perovskite solar cell, Pb < 2 + > leaked by the PSCs when the light receiving surface is damaged can be reduced, and Fresnel reflection of the light receiving surface can be reduced, so that the light energy loss is reduced, and the photoelectric conversion efficiency of the PSCs is improved.

The utility model discloses a myopia prevention and control lens which is composed of a myopia substrate, a reinforcing layer and an OAR film layer. The center of the convex surface of the myopia substrate is a myopia eye convex surface area, the periphery of the myopia eye convex surface area is provided with an out-of-focus area, a circular micro lens is arranged in the out-of-focus area, a part of the circular micro lens has second refractive power for inhibiting myopia development, and the rest part of the myopia substrate has first refractive power for correcting myopia; the reinforcing layers comprise an inner reinforcing layer and an outer reinforcing layer, and the reinforcing layers are arranged on the convex surface and the concave surface of the myopia substrate; an OAR film layer is arranged on the strengthening layer; the center of the inner OAR film layer is a myopia concave surface area, the inner OAR film layer is provided with a point diffusion area at the periphery of the myopia concave surface area, and concave diffusion points are uniformly distributed in the point diffusion area. According to the utility model, the functions of adjusting ciliary muscles, relieving asthenopia, reducing contrast and inhibiting myopia development can be achieved.

The utility model discloses a sound absorption structure of an earphone shell, and belongs to the field of earphones. An earphone shell sound-absorbing structure comprises a head-mounted ring, connecting ends are fixed to the ends of the two sides of the head-mounted ring, earmuffs are fixed to the inner sides of the connecting ends, a sound-absorbing component is bonded to one side of each earmuff through quick-drying glue, an earphone body is bonded to one side of each sound-absorbing component through quick-drying glue, and the earphone body is fixed to the head-mounted ring through the quick-drying glue. According to the utility model, the sound absorbing cotton is arranged in the hush pipe, and the hush pipe is connected with the sound absorbing group through the components such as the sleeve, the reserved opening and the cavity shell, so that sound can enter the hush pipe and is absorbed by the sound absorbing cotton, and the sound absorbing cotton can effectively absorb redundant sound and lingering sound; the transmission and reflection of noise are reduced, the silencing effect is achieved, and meanwhile the problems of sound quality loss and noise interference are solved.

The invention discloses a radio frequency coaxial switch, and relates to the technical field of radio frequency connectors, and the switch comprises a switch body, the bottom of the switch body is fixedly connected with an installation butt joint structure, the installation butt joint structure is used for guaranteeing that an internal microstrip transmission line carries out signal transmission on a circuit board through a shielding cover, and a dynamic contact point regulation and control assembly is matched with a dynamic regulation and control assembly. Contact pressure can be automatically adjusted, it is ensured that communication signals are accurate, the contact pressure can be integrally and effectively adjusted automatically according to high-frequency signals or low-frequency signals, error codes of the communication signals caused by poor contact are reduced, the overall operation performance is improved, magnetic particles are gathered in the flexible superconducting contact points in the specific direction, and the contact quality is improved. The contact pressure is increased or reduced, so that the overall signal transmission performance can be improved, the signal loss and reflection can be reduced, and the reliability and efficiency of the radio frequency coaxial switch in different frequency signal processing can be improved.

The invention discloses an acoustic emission detection device for early loosening of a bolt. The acoustic emission detection device comprises a signal acquisition board, an acoustic emission sensor, a pre-amplifier, an acoustic emission acquisition instrument and a display, the signal acquisition plate is a square thin steel plate, one-dimensional acoustic black hole structures are arranged on three boundaries, and a two-dimensional acoustic black hole structure is embedded in the center; the acoustic emission sensor is adhered to the back surface of the two-dimensional acoustic black hole structure and is used for acquiring an acoustic emission signal generated by early loosening of the bolt; the sensor is connected with an acoustic emission acquisition instrument through a preamplifier, and the acquisition instrument is connected with a display through a data line so as to display monitored acoustic emission signals in real time. According to the invention, the precision and sensitivity of bolt looseness detection, especially early looseness detection of a bolt structure, can be effectively improved, structural failure is prevented, and safe operation of equipment is guaranteed; the device has the advantages of simple structure, accurate detection, convenient operation and the like.

The invention belongs to the technical field of optical module testing, and particularly relates to an optical module chip automatic testing method which comprises the following steps that S1, a conveying mechanism conveys a material disc to the position below a suction cup, an air cylinder clamping jaw acts to clamp the material disc and fix the material disc, and a three-axis moving platform drives the suction cup to descend and adsorb an optical module chip in the material disc; then the optical module chip is driven to ascend and move to the position above the camera; the position information of the optical module is identified by adopting multiple cameras, and the angle and the direction of the optical module are synchronously adjusted in real time, so that the accurate alignment of the position of the optical module in the test process can be ensured, errors caused by position deviation are eliminated, the butt joint of the optical module and the optical fiber connector is more accurate, the coupling efficiency of optical signals is improved, and the test accuracy is improved. And loss and reflection of optical signals are reduced. Therefore, the test precision of the optical power (TX / RX) can be obviously improved, the accurate and consistent position of the optical module in each test can be ensured, and the test fluctuation caused by position offset is reduced.

The invention discloses a power line carrier communication enhancement method and system, a carrier machine and a wave trapper. The method comprises the following steps: determining a target power line, acquiring information of the target power line and environmental data of the target power line in real time, correspondingly determining a distance grade and a power line topology complexity grade according to the length of the power line and a power line topology structure, and determining an environmental grade according to the environmental data; monitoring channel and signal state data and power line impedance data in real time; correspondingly and dynamically matching a first power line carrier communication enhancement strategy and a second power line carrier communication enhancement strategy according to the real-time output of the distance grade, the environment grade and the power line topology complexity grade of the target power line; and in combination with channel and signal state data and power line impedance data obtained by real-time monitoring, respectively applying matched enhancement strategies to complete power line carrier communication enhancement processing. According to the invention, an actual power line application scene can be considered, and effective long-distance power line carrier communication enhancement is realized.

The method comprises the steps that Vs-Zn3In2S6, (NH4) 2MoS4 and an alcoholic solution are mixed, inert gas is introduced, the mixture is placed under a xenon lamp light source to be subjected to a photo-thermal synergistic pulse type deposition reaction, solids are centrifugally collected, washed and dried, and the high-efficiency photocatalytic hydrogen production material is obtained. And grinding to obtain the efficient photocatalytic hydrogen production material. The method solves the problems that the thickness of a deposition layer is not uniform and the deposition time is long in an existing deposition method. The co-catalyst can be directionally deposited on the surface of the semiconductor material in a short time through a photo-thermal synergistic pulse type deposition method, so that the active sites of the material are greatly improved, the reflection of light is reduced, the absorption range of the light is enhanced, and the material has very strong absorption peaks in visible light and near-infrared regions; therefore, the utilization efficiency of sunlight and the photocatalytic conversion efficiency are improved. The method is simple, environmentally friendly, free of precious metal addition and suitable for actual industrial production.

The invention relates to a solar cell, a manufacturing method thereof and a photovoltaic module, and the manufacturing method of the solar cell comprises the steps: providing a silicon wafer with a suede structure; a first film layer is formed on the side, where the suede structure is located, of the silicon wafer, the first film layer covers the surface of the suede structure, the first film layer comprises a first sub-part located at the bottom of a groove of the suede structure and a second sub-part located outside the bottom of the groove of the suede structure, and the thickness of the first sub-part is larger than that of the second sub-part; and etching the first sub-part at the bottom of the groove of the suede structure so as to reduce the thickness of the first sub-part. Therefore, a good suede structure can be formed on the surface of the side, away from the silicon wafer, of the first film layer, reflection of photons by the surface of the side, away from the silicon wafer, of the first film layer can be reduced, and the conversion efficiency of the solar cell can be improved.