131results about How to "Process parameters are easy to control" patented technology

The invention relates to the technical field of ring piece rolling, and discloses a large special-shaped ring piece rolling forming process analysis method which comprises the following steps: (1) forge piece and blank design: designing different types of blanks; (2) material characteristic modeling: establishing a material model meeting rolling conditions; (3) finite element model establishment: establishing a geometric model of a rolling process by utilizing finite element analysis software; (4) rolling process scheme design: designing a plurality of rolling process schemes; (5) process simulation and defect prediction: analyzing strain, stress, temperature field and metal flow conditions in the simulated rolling process, and analyzing defect generation conditions; and (6) real-time monitoring and feedback control: monitoring changes of stress, strain and temperature in real time, and automatically adjusting process parameters. And through dynamic material characteristic modeling, a self-adaptive grid division technology and multi-physical field coupling analysis, the analysis accuracy of the rolling process is improved, so that defect prediction is more accurate, and the quality of finished products is improved.

The invention discloses a tensile test device and method for environment-friendly three-resistance colored spun fiber production, and relates to the technical field of fiber tensile test. The tensile testing device and method for environment-friendly three-resistance colored spun fiber production comprise a bearing table, a control table fixed to the top of the bearing table, a guide seat fixed to the top of the bearing table, a threaded rod arranged in the bearing table in a penetrating mode and used for applying stable tension to tested fibers, and a power motor fixed in the bearing table and used for driving the threaded rod to rotate. A supporting rod is arranged on the threaded rod in a threaded and penetrating mode, an upper clamping table used for clamping a detected fiber is fixed to one end of the supporting rod, the interval of the elongation at break of a detectable fiber sample is increased, only a small space needs to be occupied, and it can be avoided that the initial length of the cut fiber sample is too long and the elongation at break is unknown; therefore, the situation that the fiber sample cannot be snapped only through linear movement of the upper clamping table and the lower clamping table is avoided.

The invention discloses an intelligent end effector integrating monitoring, detection and control. The intelligent end effector comprises a machining subsystem, a detection subsystem and a monitoring subsystem. A machining subsystem and an electric spindle are used for driving a cutter handle and a cutter to rotate for machining, a detection subsystem is used for providing sound sensation, vision and ultrasonic sensing functions, a sound sensation module collects sound signals in real time and monitors the sound state in the machining process, and a vision module collects machining pictures and analyzes the machining quality. The ultrasonic detection module emits and collects an ultrasonic signal to detect internal damage of a workpiece after machining is completed, and the self-positioning module measures the distance between a cutter and the workpiece to complete self-positioning; the monitoring subsystem is used for sensing dynamic changes of states such as tool abrasion, flutter and machining quality in the machining process through vibration acceleration and vibration displacement sensing, timely early warning is conducted on state abnormity, the state of the machining process is regulated and controlled in real time through the piezoelectric actuator, and efficient and high-quality machining of parts is guaranteed.

The invention discloses a comprehensive tea primary processing system and a processing method, and aims to improve the production and processing efficiency and quality of various varieties of tea, and formulate an efficient processing plan by analyzing feeding information, station parameter information and processing type information according to the processing flow and the running state of equipment. And the processing equipment at each station can detect the running state of the equipment in real time and record the processing batch, so that the monitoring and tracking of the processing link are realized. According to the whole system, through intelligent scheduling and monitoring of the main control module, the processing capacity in unit time is improved, the proportion of idle equipment is reduced as much as possible, the main control module can formulate a corresponding processing plan according to the characteristics and requirements of tea types so as to improve the overall processing efficiency, and by monitoring station parameter information and the processing flow, the processing efficiency is improved. And process parameters can be adjusted in real time, and homogenized and standardized primary processing production is realized. The method is very suitable for the field of centralized, diversified and automatic tea leaf processing of private customized tea leaves.

According to the two-dimensional lead-based perovskite PVDF piezoelectric-photoelectric composite film as well as the preparation method and the application thereof, (2-FBA) 2PbCl4 and PVDF are compounded, so that the content of a beta phase with a high piezoelectric constant in PVDF is effectively increased, the voltage output performance of a composite piezoelectric sensor is enhanced, meanwhile, the two-dimensional lead-based perovskite PVDF piezoelectric-photoelectric composite film has good performance in the photoelectric aspect, and the two-dimensional lead-based perovskite PVDF piezoelectric-photoelectric composite film has good application prospects. And a reliable scheme is provided for a piezoelectric-photoelectric self-powered device.

The invention belongs to the technical field of graphene preparation, and discloses a preparation method of a modified graphene electrode material of a lithium ion battery and a related product, the method comprises the following steps: pre-mixing graphite powder and concentrated sulfuric acid, then adding an oxidant in batches, carrying out suction filtration after oxidation is completed, and washing to be neutral by using diluted hydrochloric acid and deionized water; deionized water is added into the washed graphite oxide, and after multi-stage ultrasonic treatment, a graphene oxide dispersion liquid is obtained through centrifugal separation; mixing the graphene oxide dispersion liquid with a predetermined amount of urea, carrying out a multi-step hydrothermal reaction, and then carrying out centrifugal cleaning and freeze drying to obtain nitrogen-doped modified graphene powder; the nitrogen-doped modified graphene powder and absolute ethyl alcohol are ground and mixed, the surface of a pretreated foamed nickel current collector is coated with the mixture through dip coating, compaction treatment is conducted, and the modified electrode material is obtained. According to the scheme, the conductivity and the cycling stability of the graphene electrode in the lithium ion battery can be improved.

The invention discloses a PVDF emulsion demulsification washing process, and relates to the technical field of polymer modified materials. The process aims at effectively removing the residual additive in the polyvinylidene fluoride emulsion so as to improve the purity and the performance of the final product. The process comprises the following steps: firstly, mixing PVDF emulsion with a pre-prepared nano demulsifier, and conveying the mixture to a condensation tower through a screw pump; in the condensation tower, demulsifying the mixed solution at a set temperature, and mechanically stirring by adopting a frame type stirrer to promote the emulsion to be demulsified and form snowflake-shaped particles; and then, the demulsified material is discharged from the bottom of the condensation tower and enters a washing tower, and the residual auxiliary agent is removed by using deionized water in a countercurrent washing manner. And finally, dehydrating and drying the washed material. The method has the advantages that the demulsification and washing processes are optimized, so that the production efficiency is improved, the resource consumption is reduced, and meanwhile, the high purity and excellent performance of the PVDF product are ensured.

The invention belongs to the technical field of PTFE sealing gaskets, and particularly relates to a PTFE sealing gasket and a preparation method thereof. The PTFE sealing gasket disclosed by the invention is prepared from the following raw materials: polytetrafluoroethylene, hexafluorobisphenol A type polyaryletherketone, methyl phenyl organic silicon resin emulsion, polybenzothiazole fibers, polyisophthaloyl metaphenylene diamine fibers and dodecyl dimethyl amine oxide modified graphene oxide. According to the PTFE sealing gasket disclosed by the invention, the hexafluorobisphenol A type polyaryletherketone and the methyl phenyl organic silicon resin emulsion are added into the polytetrafluoroethylene, so that the mechanical property and the high temperature resistance of the prepared PTFE sealing gasket are ensured. The polybenzothiazole fiber, the polyisophthaloyl metaphenylene diamine fiber and the dodecyl dimethyl amine oxide modified graphene oxide are added into the PTFE sealing gasket and have a synergistic effect, so that the corrosion resistance, the rebound resilience and the sealing performance of the prepared PTFE sealing gasket are improved.

The invention discloses a self-adjusting grinding and separation system of a permanent magnet motor direct-driven ball mill, and belongs to the technical field of ore grinding and separation. The invention discloses a self-adjusting grinding and selecting system of a permanent magnet motor direct-driven ball mill. The self-adjusting grinding and selecting system comprises a driving control module, a state monitoring module, an automatic feeding module, a grading and separating module, an ore pond control module and a data processing and centralized control module. According to the invention, the problem of low automation and intelligence degree in the prior art is solved. By introducing permanent magnet motor direct drive, the Internet of Things technology and multiple sensors, remote control, fault diagnosis and centralized management of multiple devices are achieved, and manual intervention is greatly reduced. The intelligent optimization system adjusts process parameters in real time, ensures the optimal operation state, improves the production efficiency and the product quality, ensures the stability and reliability of the system, and truly realizes unattended intelligent production.

The invention discloses an extraction purification deep impurity removal method for a nickel sulfate solution, and belongs to the technical field of nickel sulfate solution purification, and the extraction purification deep impurity removal method comprises the following steps: carrying out saponification treatment on a P204 extraction agent by adopting a sodium hydroxide solution to obtain a saponified organic phase P204, mixing the saponified organic phase P204 with a nickel sulfate water phase, stirring and standing to obtain a nickel sulfate solution; the method comprises the following steps: separating an organic phase from a water phase, mixing the organic phase with sulfuric acid, stirring, standing, separating out a nickel sulfate solution, concentrating the nickel sulfate, and recrystallizing to obtain the high-purity nickel sulfate with the purity of 99.4-99.9%. According to the method, the battery-grade nickel sulfate product with the purity as high as 99.9% can be obtained, the requirement of HG / T2824-2009 first-grade products is met, and the method is particularly suitable for purification of crude nickel sulfate generated in the copper ore smelting process and preparation of the battery-grade nickel sulfate.

The invention provides a gemcitabine lipidosome preparation all-in-one machine and method, the gemcitabine lipidosome preparation all-in-one machine comprises an instrument shell, an operation panel, a microfluidic LNP preparation instrument, a test tube booster, a centrifugal machine and a PH detector, the operation panel is installed on the instrument shell, the microfluidic LNP preparation instrument, the test tube booster, the centrifugal machine and the PH detector are all installed in the instrument shell, and the operation panel is installed on the instrument shell. The micro-fluidic LNP preparation instrument is installed at the topmost part of the instrument shell, the right side of the micro-fluidic LNP preparation instrument is connected with the PH detector, the test tube booster is installed below the micro-fluidic LNP preparation instrument and the PH detector, the centrifugal machine is installed below the test tube booster, and integrated preparation of gemcitabine lipidosome is achieved through the structure.

According to the special-shaped FPC and the manufacturing method thereof, the pre-formed special-shaped flexible base material layer is arranged, the shape of the pre-formed special-shaped flexible base material layer is directly matched with the special-shaped surface of a target installation space, and a circuit layer, an insulation covering layer and a special-shaped supporting layer are all attached to the special-shaped surface of the special-shaped flexible base material layer, so that the FPC does not need to be forcibly bent, twisted or stretched subsequently, and the production efficiency is improved. The problems of circuit breakage and delamination caused by stress concentration are fundamentally avoided, the structural stability of the FPC is improved, and the service life of the FPC is prolonged. The flexible circuit board is used for solving the technical problem that in order to achieve special-shaped layout, the plane of an existing flexible circuit board generally needs to be forcibly bent, twisted or stretched.

The invention relates to the technical field of refractory materials, in particular to a preparation method of a self-curing tundish dry material, which comprises the following steps of: mixing, forming, drying, sintering, cooling and grinding raw materials of the tundish dry material, and mixing the obtained tundish dry material bulk material and a gel material according to a preset proportion; the tundish mold is filled with the fireproof bulk materials obtained through mixing, layered filling is adopted, vibration and degassing treatment are conducted on each layer of fireproof bulk materials to obtain a degassed fireproof solid material, curing treatment is conducted on the degassed fireproof solid material to obtain a cured fireproof layer, and the curing strength of the cured fireproof layer is detected to obtain the actual curing strength; and for the condition that the actual curing strength cannot meet the standard curing strength requirement, the standard curing strength requirement is met by adjusting vibration parameters or adjusting grinding power. By adjusting the grinding power and the vibration parameters, the curing strength of the self-curing tundish dry material meets the curing requirement.

The utility model discloses a terahertz spectrum on-line nondestructive testing system which comprises a spectrograph host and a terahertz probe module which are in signal connection with each other, the bracket is used for mounting and fixing the terahertz probe module; the terahertz probe module is arranged above a coating to be detected, a sliding table is arranged on the support, a displacement device is arranged on the sliding table, and the displacement device is connected with the terahertz probe module and used for driving the terahertz probe module to move up and down; the displacement device moves left and right on the sliding table to drive the terahertz probe module to move left and right so as to detect a terahertz spectrum signal of the coating to be detected; and the spectrometer host is used for processing and analyzing the terahertz spectrum signal so as to obtain peak position data representing the thickness of the coating to be measured. Compared with the prior art, the device has the advantages of being convenient to use, high in stability and small in size.

The invention discloses a process for producing carbon black raw oil by using catalytic slurry oil and catalytic cycle oil. The preparation method comprises the following steps: adding catalytic cycle oil into catalytic slurry oil, fully mixing to form blend slurry oil, and then carrying out sedimentation and solid removal treatment on the blend slurry oil to obtain carbon black raw oil; wherein the mass ratio of the catalytic slurry oil to the catalytic circulating oil is (80-95): (5-20); the settling solid removal treatment mode is that an oil slurry deliming agent is used for deliming treatment, and the adding proportion of the oil slurry deliming agent is 0.02%-0.1% of the mass of the catalytic oil slurry. According to the invention, the purpose of producing the carbon black raw oil by using the catalytic slurry oil is realized, the product quality meets the index requirements of GB / T41957-2022 Carbon Black Raw Oil Petroleum Refining Catalytic Slurry Oil, and the production process is simple and feasible.

The present invention relates to the field of stamping die technology, and discloses a stamping die and a stamping method for automobile parts. The die includes a first base, a lower die base, a concave die, a convex die and other components. The vibration of the die is monitored by a signal transmitter and a signal receiver to ensure production stability. The present invention ensures that the lower die base is stably installed on the first base through the sliding connection between the first limit slider and the limit groove, thereby improving the stability of the die. Tightening bolts simplify the installation and adjustment of the die, and enhance flexibility and maintainability. The hydraulic cylinder drives the push plate to eject the workpiece, improves the stamping efficiency, and ensures accurate disengagement. The automated blanking assembly includes motor drive, cylinder adsorption and motor rotation placement to realize automated production, improve efficiency and reduce labor costs.

The utility model discloses a liquid injection flow monitoring device which is communicated with a pinch valve and comprises a liquid injection pipe and a liquid injection nozzle which are used for circulating electrolyte, and further comprises a sensor which is connected with the liquid injection pipe and is used for monitoring the circulating condition of the electrolyte in the liquid injection pipe. The sensor is arranged on the outer wall of the liquid injection pipe, so that the circulation condition of electrolyte in the liquid injection pipe can be monitored, whether the battery cell is in an absorbable state or not can be predicted according to the flow condition, and when the battery cell is in a non-absorbable state or is poor in absorption effect, the next circulation process is carried out, the liquid injection time is shortened, and the liquid injection efficiency is improved.

The invention relates to the technical field of circulating cooling water systems, and particularly discloses a circulating cooling water online monitoring intelligent response system which comprises a water quality parameter acquisition and analysis module, a water hardness data acquisition and analysis module, an influence relation analysis module and a scale inhibitor dosage control and adjustment module, the water quality parameter acquisition and analysis module is used for acquiring the pH value, the conductivity and the turbidity of cooling water and judging the water quality state according to the pH value, the conductivity and the turbidity; the water hardness data acquisition and analysis module is used for acquiring calcium ion and magnesium ion concentrations, calculating a unit water hardness value and further judging a water hardness state; the influence relation analysis module analyzes the interaction relation according to the state signals of the water quality and the water hardness; the water quality and water hardness change of the circulating cooling water system can be effectively monitored, efficient and stable operation of the system is guaranteed through automatic control, the maintenance cost and the chemical consumption are reduced, and remarkable energy-saving and environment-friendly benefits are achieved.

The application discloses a liquid metal-based shape-insensitive flexible conductive fabric and a preparation method and application thereof. The preparation method comprises the following steps: preparing a thermoplastic polyurethane elastomer (TPU) fiber pad and a liquid metal (LM) microsphere solution; uniformly depositing and trapping the LM microspheres in the pores of the TPU fiber pad through vacuum filtration; and hot-pressing the TPU fiber pad filled with the LM microspheres to make the LM microspheres break and fuse, so that a continuous conductive path is formed, and a flexible conductive fabric is obtained. The conductive fabric takes the TPU fiber pad as a flexible skeleton, and provides good deformation and recovery capacity; the LM is a conductive filler, and has excellent conductivity and fluidity. When various deformations such as stretching, bending, compression and twisting occur, the LM can deform synchronously with the TPU fiber skeleton and does not leak, and has good shape-insensitive conductivity. The conductive fabric can be applied to the fields of flexible high-conductive electrodes, flexible circuits, electromyographic signal monitoring, electrocardiographic signal monitoring and heat management.

The invention relates to the field of high-speed steel heat treatment, and provides high-wear-resistance high-speed steel and a strengthening method thereof. The preparation method of the high-wear-resistance high-speed steel comprises the following steps: firstly carrying out pulse current austenitizing treatment on commercial high-speed steel, then quenching, and then carrying out pulse current multi-gradient tempering treatment. According to the method, the long-time and high-temperature heat treatment process is shortened, the cost and the energy consumption are reduced, the process is simplified, grains and carbides are refined at the same time through the cooperative regulation effect of the process and parameters, and the obtained high-speed steel is superior to the high-speed steel obtained through high-temperature and long-time treatment: austenitizing, quenching and tempering in the prior art in hardness and wear resistance, and has the good application prospect. The method is suitable for industrial production.

The invention discloses a hot-rolled plate structure toughness prediction method and system combined with an impact energy change curve, and belongs to the technical field of metal material structure performance evaluation.The method comprises the steps that an impact test is conducted on a hot-rolled plate sample, and an impact force-displacement curve and an energy absorption-time curve are collected in real time; preprocessing the impact force-displacement curve and the energy absorption-time curve, and extracting characteristic parameters; acquiring hardness distribution data of the hot-rolled plate sample, acquiring hardness gradient data by using the hardness distribution data, and taking the hardness gradient data as a correction factor of the curve characteristics; constructing a structure toughness prediction model based on the characteristic parameters and the correction factors, and predicting the toughness grade and the structure state of the hot-rolled plate; and outputting the toughness grade and the structure state of the hot-rolled plate. According to the method, the limitation that traditional metallographic detection consumes too long time and an impact test only provides a single value is solved, double evaluation results can be obtained within 30 seconds after the impact test, and the method is suitable for rapid online quality monitoring and process adjustment of hot rolling production.

The invention belongs to the technical field of plant beverage processing, and particularly relates to a gingko, dendrobium officinale and ginseng plant beverage crushing, mixing and preparing device which comprises a mixing and preparing machine, a universal pulverizer, an ultrafine pulverizer, a freezing pulverizer and a high-pressure homogenizer, and the mixing and preparing machine comprises a material cavity, a feeding opening, a discharging opening and a stirring mechanism; the preparation method of the mixing preparation machine comprises the following preparation steps: S1, raw material pretreatment: selecting ginkgo leaves, fresh dendrobium officinale strips and ginseng rhizomes which are free of mildew and diseases and insect pests, cleaning the ginkgo leaves, drying the ginkgo leaves with hot air, removing fibrous roots from the fresh dendrobium officinale strips, cutting the fresh dendrobium officinale strips into long sections, peeling the ginseng rhizomes, and cutting the peeled ginseng rhizomes into long slices; s2, graded crushing is conducted, specifically, the pretreated ginkgo leaves are put into a universal pulverizer to be pulverized and then transferred into an ultrafine pulverizer to be further pulverized into fine particles, and the device solves the problems that when the ginkgo, dendrobium officinale and ginseng plant beverage is prepared through crushing and mixing at present, the mixing effect is poor, and the stability and taste of the beverage are directly affected.

The application relates to a device for preparing ceramic blocks by self-propagating high-temperature synthesis, and belongs to the technical field of ceramic preparation. The device comprises a ceramic block limiting device and a detonation-driven flyer device arranged above the ceramic block limiting device; after the explosion of the explosive in the detonation-driven flyer device, a flyer is driven to impact the ceramic block limiting device; the ceramic block limiting device comprises a top cover, a constraint component coaxially sleeved outside the top cover and a base connected with the constraint component; the top cover is provided with a groove capable of closely matching a convex side surface of the base, and an outer edge extending outward is arranged at the groove mouth; the constraint component is limited by the abutment of a stepped surface in the constraint component and an upper end surface of the outer edge; an ignition hole for placing an aluminized agent is arranged on the side surface of the top cover, and a through groove for placing an ignition wire in contact with the aluminized agent is arranged on the side surface of the constraint component. The device realizes omnibearing limitation of ceramic initial blanks, and is favorable for obtaining ceramic blocks with high compactness.

The invention relates to the technical field of pesticides, and provides a dry suspending agent as well as a preparation method and application thereof. The dry suspending agent comprises the following components in parts by weight: 25-80 parts of an active component, 10-15 parts of a first wetting dispersant and 3-8 parts of a second wetting dispersant. According to the dry suspending agent, through compounding of the first wetting dispersant and the second wetting dispersant, the dispersion effect of the wetting dispersants is effectively improved, the dispersity of active ingredients in the dry suspending agent is improved, and the pesticide effect of the dry suspending agent is improved.

The present application relates to the technical field of high polymer composite material processing, and particularly relates to an online detection method and system for high polymer composite material processing and a medium, the method comprising: controlling a hot-press forming device to hot-press form mixed and uniform high polymer composite material to obtain a high polymer composite material sample to be detected; controlling a detection device installed at an outlet end of the hot-press forming device to sequentially perform rheological property detection and optical property detection on the high polymer composite material sample to obtain rheological property data and an infrared spectrum; wherein the rheological property data comprises at least one of viscosity, elastic modulus and yield stress; determining a performance parameter of the high polymer composite material sample based on the rheological property data and the infrared spectrum; determining an adjustment parameter based on the performance parameter and a preset standard parameter, and adjusting the hot-press forming device based on the adjustment parameter; and the present application can adjust process parameters in real time and improve processing efficiency.

The present application discloses a kind of hibiscus compound extract, its preparation method and application.The composite extract includes hibiscus exosome, hibiscus traditional active ingredient, snowbank flower extract and microalgae extracellular polysaccharide, wherein the hibiscus exosome and hibiscus traditional active ingredient are simultaneously extracted from hibiscus raw materials by integrated extraction process.The preparation method includes raw material pretreatment, integrated extraction, separation and purification, synergistic compounding and post-processing, and two types of active substances are efficiently and synchronously obtained by optimizing solvent, temperature, time and purification parameters.The composite extract exhibits excellent anti-aging, anti-inflammatory and moisturizing effects in cosmetics, and has excellent effects of regulating intestinal flora and enhancing immunity in functional foods.The process produces significant synergistic effect by combining specific synergistic components, and the effect is much better than single component or simple mixture, realizing the maximization of plant resources and the synergistic promotion of efficacy.

The invention provides a drug carrier based on N-acetylglucosamine, a drug preparation and a preparation method. The drug carrier based on N-acetylglucosamine comprises N-acetylglucosamine and a cross-linking agent, the cross-linking agent is a compound with an aldehyde group or a ketone group, and the aldehyde group or the ketone group reacts with the deacetylated N-acetylglucosamine to generate one or more of a hydrazide bond, a hydrazone bond or an imine bond. The drug carrier based on N-acetylglucosamine shows remarkable advantages in the aspects of particle size distribution, drug loading capacity, encapsulation efficiency and cumulative drug release rate.

According to the film thickness measuring system and method based on the FBAR sensor, the fitting calibration curve database is established, and the FBAR sensor is embedded into the film deposition equipment, so that the film deposition thickness can be measured in real time, a wafer does not need to be taken out of a film deposition machine table for measurement, and the running time is shortened; in addition, the change of the deposition process can be reflected in real time by monitoring the change of the film deposition thickness in real time, the process parameters are adjusted in time accordingly, the process adjustment time is shortened, and the process optimization efficiency is improved.

The application discloses a method for recovering tin, gold and silver from high-gold-silver-tin-containing materials, and belongs to the technical field of non-ferrous metal smelting methods.The method adopts a hydrochloric acid-hydrogen peroxide system for leaching, so that tin, gold and silver enter a solution and are separated from insoluble residues; sulfur dioxide is introduced into the acid leaching solution to selectively reduce and precipitate sponge gold; after the gold is precipitated, silver chloride is precipitated by diluting the solution, and high-purity silver powder is obtained by dissolving the silver chloride in ammonia water and reducing the silver chloride by hydrazine hydrate, and the silver powder is cast into an ingot; the tin-containing solution can be recycled or neutralized to precipitate and recover tin.The method has a short process, realizes efficient separation of gold, silver and tin by selectively reducing gold by SO2 and precipitating silver by dilution, has high metal recovery rate (tin > 98.5%, gold > 99.5%, and silver > 99.5%), most of the solution is recycled, is environmentally friendly, has remarkable economic benefits, and the like.

The present invention provides an online detection device for filtration efficiency of meltblown cloth production, which specifically relates to the field of meltblown cloth production. An electrostatic device is provided at the rear section of the meltblown cloth, the electret rod [2] is located directly below the first metal roller [10], and the metal roller [10] is grounded to the machine chassis, and the meltblown cloth can be subjected to the electret effect and high-voltage electrostatic radiation during the process of rotating toward the cloth collecting roller [5]; the high voltage emitted by the electrostatic generator is controlled by the meltblown cloth control system and adjusted according to the detection result of the latter stage filtration efficiency. The present invention can detect the filtration efficiency of the meltblown cloth in real time and online during the production process through this device, and feed back to the control system of the meltblown machine, so as to adjust the process parameters in time to ensure that the filtration efficiency of the produced meltblown cloth meets the standard requirements.