44results about How to "Realize precise regulation" patented technology

The invention discloses a distributed intelligent drip irrigation control system based on the Internet of Things, and belongs to the technical field of agricultural irrigation. The distributed intelligent drip irrigation control system comprises a basic water conservancy facility used for providing a water supply demand of certain water pressure for a drip irrigation system; the water tower is designed as a constant-pressure water source to ensure the water pressure uniformity of the whole irrigation area; the water and fertilizer mixing box is used for mixing fertilizer and water in proportion to form a water and fertilizer solution suitable for being absorbed by crops, the mixing proportion is determined by an algorithm # imgabs0 #, F is the fertilizer concentration, Nreq is the nutrient amount needed by the crops, and Nsoil is the current nutrient amount in soil. According to the invention, through efficient and accurate water and fertilizer resource management, the problems of unreasonable resource allocation, low utilization efficiency and the like in a traditional irrigation method are solved, and through integration of an advanced sensor technology, a wireless communication module and an intelligent control algorithm, accurate regulation and control of farmland water and fertilizer supply can be realized; and an irrigation strategy can be automatically adjusted according to real-time environment data and crop growth conditions.

The invention provides a non-invasive nerve regulation and control device. The non-invasive nerve regulation and control device comprises an optical fiber, an optical fiber fixing device arranged at one end of the optical fiber, a laser light source arranged at the other end of the optical fiber and a photoelectric conversion material positioning and injecting assembly. The photoelectric conversion material positioning and injecting assembly is used for injecting a photoelectric conversion material into a specified solution injection point; the photoelectric conversion material is powdery and comprises nanoparticles capable of converting near-infrared light into electric signals, and the photoelectric conversion material is dispersed in normal saline so as to be injected into biological tissues; the laser light source irradiates laser in a near-infrared band to an area where a photoelectric conversion material injection point is located, so that the laser is converted into an electric signal through the photoelectric conversion material, and the electric signal stimulates an area where a solution injection point is located. The non-invasive nerve regulation and control device has the advantages of non-invasiveness, high efficiency, system uniqueness, stability and programmable control, can realize accurate regulation and control of neurons and neural circuits, and has a wide application prospect.

The invention relates to the technical field of medical instruments, and discloses an application of a collagen-gelatin combined VEGF (vascular endothelial growth factor) mimic peptide in promoting growth of blood vessels, the collagen-gelatin combined VEGF mimic peptide is QKCMP-Enhancer, and the sequence of the collagen-gelatin combined VEGF mimic peptide is Ac-KLTWQELYQLKYKGI-(GPO) 5-(KR) 4-(RGD) 4-(KR) 4-GGG-(Gly) 3-NH2. The invention discloses a collagen-gelatin combined VEGF (vascular endothelial growth factor) mimic peptide which shows remarkable biological activity in the aspects of promoting angiogenesis, stimulating cell proliferation and inhibiting cell apoptosis. A new way and a new strategy are developed for treating related diseases; the collagen-gelatin is combined with the VEGF mimic peptide, so that a safer, more efficient and controllable angiogenesis method can be realized, and the collagen-gelatin combined VEGF mimic peptide has remarkable clinical application potential.

The invention relates to the technical field of liquid compressed air, and particularly discloses a liquid compressed air standby system, which comprises a first calculation module used for calculating the energy consumption influence degree of all types of equipment operation parameters of each type of equipment at the current moment; the second calculation module is used for calculating the yield influence degree of the operation parameters of all types of equipment of each type of equipment at the current moment; the construction module is used for obtaining regulation and control values of all types of equipment operation parameters of each type of equipment at the current moment based on the energy consumption influence degree and the yield influence degree of all types of equipment operation parameters of each type of equipment at the current moment; and the control module is used for obtaining an optimal liquid compressed air standby result based on the regulation and control values of the operation parameters of all types of equipment at the current moment. According to the method, the two aspects of energy consumption and liquid nitrogen yield are comprehensively considered, so that accurate regulation and control of all equipment of the liquid compressed air standby system are realized, and an optimal liquid compressed air standby result is realized.

The invention relates to the technical field of frequency modulation control, in particular to a frequency modulation control method and system for a thermal power generating unit. The method comprises the following steps: collecting and transmitting power grid load fluctuation data through a sensor, and carrying out time sequence load trend analysis to obtain load fluctuation time sequence trend data; then, based on the data, thermal power and steam pressure states are collected in real time, nonlinear demand association identification of thermal energy conversion and steam pressure is carried out, and thermal energy conversion-steam pressure association data are obtained. And according to the data, quantifying the power generation frequency modulation demand of the power grid, and formulating an energy input control strategy. And finally, designing a global frequency modulation control strategy through the control data, and feeding back the global frequency modulation control strategy to the cloud platform to execute the frequency modulation control method. According to the invention, the frequency modulation control technology is optimized, so that the frequency modulation control technology is more perfect.

The invention discloses a plasma rotation type large-area polycrystalline MPCVD diamond growth method, and relates to the technical field of microwave plasma chemical vapor deposition, and the method comprises the following steps: S1, setting environmental parameters of diamond growth in a reactor through a microwave feeder, sampling plasma state data in the reactor, and calculating the plasma state data; if the plasma is stably started, executing S2; and S2, the plasma state in the reactor is adjusted through the plasma regulator according to the plasma state data in the reactor, the coverage area of plasma discharge is increased, and then the growth area of the polycrystalline diamond is increased.

The invention discloses a metal material current micro-area step-by-step scanning processing device and a processing method thereof. The metal material current micro-area step-by-step scanning processing device comprises a PC control system, a current output system, a current micro-area processing device, a workpiece conveying device, a temperature measurement and control system, an insulation module and a high-performance computer system. According to the equipment and the process, the problems that in the traditional heat treatment process, the size of a furnace cavity is limited, and the heat treatment time is long are solved, meanwhile, the structure performance of a specific tiny area of a metal material can be precisely regulated and controlled, the production efficiency is remarkably improved, the production cost is reduced, the comprehensive performance of a product is improved, and the equipment and the process can be used for industrial large-scale production.

The invention belongs to the technical field of high-entropy alloys, and particularly relates to a CoCrNi series high-toughness high-density twin boundary medium-entropy alloy and a preparation method thereof. Aiming at the situation that the traditional alloy component design field lacks mature and reliable design principles, the invention provides three component design principles: high elastic modulus, low stacking fault energy and proper phase stability. Based on the three principles, the general formula of the non-equal-atomic-ratio medium-entropy alloy is CoaCrbNic, 30 < = a < = 37, 30 < = b < = 35, and 28 < = c < = 40. A metal raw material with the purity being 99.5% or above is polished and cleaned and then smelted into a cast ingot in a vacuum arc furnace, and then the medium-entropy alloy with high strength and toughness and the high-proportion twin boundary can be obtained after solid solution, hot rolling and recrystallization annealing processes are conducted. The design principle can also be popularized to other alloy systems, operation is easy, the production period is short, safety and reliability are achieved, and wide application prospects are achieved.

The invention relates to the technical field of intelligent control, in particular to a part notch machining control method and system and a medium, and the method comprises the steps: obtaining a historical image of a part and notch machining parameters for machining the part; extracting image features of the historical image, taking the image features of the historical image and the corresponding notch processing parameters as training samples, performing feature learning on the training samples by using a deep learning model, and establishing a mapping model between the notch processing parameters and the image features; a part image obtained in the current machining process is obtained, notch machining parameter prediction is conducted on the part image according to the mapping model, and the notch machining parameters are obtained; the machining path is optimized through the notch machining parameters obtained through prediction, the optimized machining path is obtained, and the part notch is machined according to the optimized machining path; on the premise that the machining quality is guaranteed, the machining time is effectively shortened.

The invention discloses a niobium material workpiece welding machining control method and device.The niobium material workpiece welding machining control method comprises the steps that a main magnetic field is applied to a welding joint, and a pulse magnetic field and a first oscillation sound field are superposed to form a composite physical field; performing preheating treatment and high-frequency oscillating magnetic field regulation and control under the action of a composite physical field; a quasi-steady-state organization structure with chain-shaped-grid arrangement characteristics is formed through electron beam welding; adjusting field parameters according to a preset change rate to realize tissue transformation control; finally, tissue optimization is conducted through the combined action of the pulsed magnetic field and low-frequency sound vibration. According to the technical scheme, through the synergistic effect of a composite physical field, uniform control over grain orientation of a welding seam area is achieved, formation of a large-angle grain boundary is effectively restrained, and the stability of the superconducting performance of a welding joint in an extremely low-temperature environment is guaranteed.

The invention discloses a gain spectrum adjustable laser medium based on structure compounding and a preparation method thereof. According to the gain spectrum adjustable laser medium, hot melting structure compounding is carried out on at least two types of laser media, relative structure proportion parameters between different laser media are designed, and controllable tuning of the gain spectrum of the laser medium is achieved. From the perspective of the matrix materials, the active ions can simultaneously have the characteristics of various local environments, such as high glass doping concentration, large bandwidth, high crystal thermal conductivity and optical anisotropy due to the structural composition of various matrix materials; from the perspective of the active ions, unnecessary microscopic energy transfer among the active ions can be avoided through partition compounding of different active ions, and the emission efficiency is improved. According to the invention, through structural composition of various laser media and accurate regulation and control of the gain spectrum of the laser media based on structural proportion parameters, application requirements of special solid lasers and special optical fiber preforms can be met.

The invention discloses a prism device, an optical path offset compensation method and an optical module, and a printed circuit board of the prism device is provided with a first board, a second board, a thermistor feedback circuit unit, a central processor, a power supply, a beam splitter prism optical signal feedback unit and a PD photoelectric detector. The second plate is connected with the printed circuit board through a micro-motor system, a prism is arranged on the second plate, a beam splitter prism is arranged at the emergent end of the prism, light waves are divided into two parts through the beam splitter prism, one part of the light waves are transmitted to a collimator, and the other part of the light waves are transmitted to a PD photoelectric detector. According to the invention, temperature change can be monitored in real time, the prism angle can be automatically adjusted, slight displacement is improved, light path offset is compensated, and stable transmission of signals is ensured.

The invention relates to the technical field of copper powder preparation, and provides a preparation method of liquid-phase in-situ self-assembly nano-shell-coated micron-core composite copper powder, a specific inducer is introduced into a liquid-phase reduction system, copper sulfate is adopted as a copper salt, and sodium hypophosphite or VC is adopted as a reducing agent, so that one-time forming of a micron-core-nano-shell composite structure is realized; the problems of non-uniform particle size distribution, high energy consumption, low yield and the like in a traditional copper powder preparation method are effectively solved; according to the prepared composite copper powder, the low-temperature sintering driving force brought by the nanometer shell layer is obtained while the process-friendly characteristics of being easy to filter, easy to wash, easy to dry and the like of micron powder are reserved, the initial sintering temperature can be reduced to about 150 DEG C, and the machining performance of the copper powder under the low-temperature condition is remarkably improved.

A high-grade matte blowing rapid mass transfer and heat transfer system comprises a bottom-blown converter, the bottom-blown converter is provided with a hot matte inlet, a flue gas outlet and a bottom-blown air supply nozzle; the hot matte inlet is arranged on the side wall at one end of the bottom-blown converter; the flue gas outlet is arranged on the top of the bottom-blown converter; the bottom-blown air supply nozzles are provided in a plurality and are respectively arranged at the bottom of the bottom-blown converter; a hot matte feed pipe is movably provided on the hot matte inlet; the hot matte feed pipe is inclined, the hot matte inlet is connected to the lower end of the hot matte feed pipe, and the hot matte enters the bottom-blown converter through the hot matte feed pipe; a flue is movably provided on the flue gas outlet; a cold material feed port is provided on the side wall of the flue; a plurality of cold material feed ports are provided; a cold material feed channel is provided on the cold material feed port; the cold material feed channel is inclined; the lower end of the cold material feed channel is connected to the cold material feed port.

The utility model discloses an asphalt concrete compacting device, relates to the field of road compacting equipment, and can solve the technical problems that in the prior art, a compacting roller component in an existing small compacting machine is heavy in overall weight, operation is difficult when a compacting roller is installed on the compacting machine, after compacting work is completed, the compacting roller is inconvenient to detach, and the compacting efficiency is high. In order to solve the problem that the compaction roller is inconvenient to maintain or replace when the compaction roller breaks down or is damaged, a plurality of mounting grooves are formed in the compaction roller, and the flexibility of weight adjustment is ingeniously achieved through the design of the compaction roller. When a weighting device does not need to be loaded, the overall weight of the compaction roller is light, and transfer, loading and maintenance work of operators are greatly facilitated. And when the compaction roller is put into use, weighting devices are loaded in the reserved mounting grooves, so that the overall weight of the compaction roller can accurately reach the standard required by the actual working condition, and the stability and high efficiency of equipment in different working environments are ensured.

The invention relates to a homogenized diamond / silicon carbide composite material as well as a preparation method and application thereof, in particular to the homogenized diamond / silicon carbide composite material which is based on a solvothermal process and is prepared by the following steps: firstly, dipping diamond particles in a precursor reaction solution to obtain a blend of diamond and the precursor reaction solution; and secondly, heating the blend for gelation-curing, and then performing carbonization and siliconizing to obtain the homogenized diamond / silicon carbide composite material. The preparation method provided by the invention solves the problems of non-uniform distribution of silicon carbide and silicon, poor comprehensive performance and the like in the prior art.

The utility model relates to the technical field of antenna installation, and discloses an antenna structure for microwave communication, which comprises a base, the right side of the middle part of the upper end of the base is fixedly connected with a third fixing block, the left side of the middle part of the upper end of the base is fixedly connected with a first fixing block, and the middle part of the first fixing block is fixedly connected with a first rotating shaft. The outer wall of the first rotating shaft is slidably connected with the inner wall of a driven wheel, the top of the driven wheel is fixedly connected with a second fixing block, the top of the second fixing block is fixedly connected with a microwave antenna, the middle of the upper end of the microwave antenna is fixedly connected with a feed source, a rotating wheel groove is formed in the rear side of the base, and the left side of the rotating wheel groove is fixedly connected with a motor. The output end of the motor is fixedly connected with a driving wheel. According to the utility model, the antenna device is integrated, so that the working difficulty during installation is reduced, the device can be quickly installed or detached, and the possibility of loosening during installation is reduced.

The invention relates to an agricultural soilless vegetable cultivation device. The agricultural soilless vegetable cultivation device comprises a cultivation box, a bearing frame, an observation mechanism, a nutrition supply mechanism and a control table, the cultivation box is provided with a cultivation cavity and an illumination receiving opening, the bearing frame is arranged in the cultivation cavity, and a plurality of supporting column cultivation plates and a driving mechanism are arranged on the bearing frame; the driving mechanism drives the plant cultivation plate to circularly pass through the illumination area, the observation area and the nutrition supplementing area on the bearing frame; the observation mechanism is arranged in an observation area and captures image information of plants in real time, the nutrition supply mechanism is arranged in a nutrition supplement area and provides nutrition mixed liquid for the plants passing through the nutrition supplement area, and the observation mechanism and the nutrition supply mechanism are electrically connected with the control console. And the image information is received and the nutrient supply mechanism is controlled to adjust the concentration of the nutrient mixed solution, so that the growth condition of the plant in the device can be observed in real time, the growth environment of the plant can be adjusted in time, and the normal growth of the soilless culture plant is ensured.

The application discloses a kind of based on dynamic feature fusion's oral root tip sheet segmentation method and device, it is related to medical image processing technical field.The method includes: obtaining unannotated oral periapical X-ray image and annotated oral periapical X-ray image;According to unannotated oral periapical X-ray image, the initial structured block adaptive mask self-encoder is pre-trained to self-supervision;According to annotated oral periapical X-ray image and trained structured block adaptive mask self-encoder, the initial oral periapical X-ray film multi-class structure segmentation model is trained, and the trained oral periapical X-ray film multi-class structure segmentation model is obtained;To-be-segmented oral periapical X-ray image is input into trained oral periapical X-ray film multi-class structure segmentation model, and the segmentation result corresponding to to-be-segmented oral periapical X-ray image is obtained.The application reduces the dependence on artificial annotation, and improves the accuracy of oral periapical X-ray image segmentation.

The application discloses a preparation method of a high-plasticity hierarchical structure SnO2 reinforced modified silver-based composite material. The application quantitatively and stably prepares SnO2 reinforced phase powder with a sandwiched three-layer structure type and a hierarchical structure characteristic by using a crystal type transformation regulation and control new strategy, and combines a cumulative cold drawing process to prepare a new type of Ag / SnO2 composite material with high plasticity, solves the industry bottleneck problems of poor plasticity and high processing difficulty of a traditional Ag / SnO2 composite material, and promotes the industrialization process of the Ag / SnO2 composite material.

The invention relates to the technical field of tumor treatment, in particular to a tumor microenvironment response type radiotherapy strategy making method, which comprises the following steps: S1, tumor microenvironment dynamic interaction analysis: monitoring and evaluating signal transmission and interaction between cells in a tumor microenvironment in real time, and identifying key factors influencing a radiotherapy effect; s2, dynamic monitoring of the circulating tumor cells: evaluating changes of the circulating tumor cells in the radiotherapy process by analyzing the number, phenotype and gene characteristics of the circulating tumor cells; s3, self-adaptive radiotherapy strategy adjustment: adjusting a radiotherapy scheme in real time; s4, feedback mechanism and prognosis evaluation: establishing a feedback mechanism, regularly evaluating the treatment effect by monitoring the tumor microenvironment and circulating tumor cell change, and optimizing the treatment scheme according to the evaluation result. According to the invention, accurate regulation and control of the radiotherapy scheme are realized, so that the accuracy and the treatment effect of personalized treatment are improved.

The application relates to an off-line loading device for studying thermal attenuation of a fuel cell catalytic layer and a use method, and realizes thermal attenuation of the catalytic layer in an external heat source heating mode. The off-line loading clamp comprises a clamp base, a pressure component and a pressure adjusting knob, and is used for clamping and fixing a sample to be measured; the temperature control assembly comprises a heating component, a temperature sensor and a temperature digital display component, and is used for monitoring and visualizing the internal temperature of the sample to be measured; the pressure control assembly comprises a pressure sensor and a pressure digital display component, and is used for monitoring and visualizing the bearing pressure of the sample to be measured. Compared with the prior art, the application excludes the interference of chemical degradation in in-situ testing, can realize accurate regulation of key factors influencing the catalytic layer thermal attenuation process such as the bearing pressure, the internal temperature and the internal humidity of the sample, and has the advantages of simple structure and convenient operation.

The invention belongs to the technical field of core nuclear magnetic resonance measurement, and provides a mobile core nuclear magnetic resonance measurement method and system based on step length control, and the method comprises the steps: carrying out the calibration of different positions of a coil, and obtaining the calibration coefficients corresponding to the different positions of the coil through a moving stepping mode; after the coil is scaled, the core to be tested is moved to a coil signal acquisition area for testing according to a set step length based on a scale coefficient; during testing, the same stepping mode is kept in the scale process, T2 signals of the full-diameter to-be-tested rock cores at different length positions are obtained, and nuclear magnetic resonance data of the to-be-tested rock cores are obtained through data processing. By means of accurate driving of the stepping motor, errors caused by manual operation or mechanical instability in traditional measurement are eliminated, repeatability and consistency of measurement are greatly improved, and reliable guarantee is provided for subsequent data analysis.

The invention relates to the field of batteries, and provides a battery monomer and a preparation method thereof, a battery device, a power utilization device and an energy storage device.The preparation method of the battery monomer comprises the steps that a battery cell assembly is provided, and the battery cell assembly is formed by laminating or winding a positive plate, a diaphragm and a negative plate; providing a shell, and placing the battery cell assembly in the shell; providing an electrolyte, and injecting the electrolyte into the shell; carrying out a formation step; the positive plate comprises a positive active component, the positive active component comprises a modified MXene material, and the modified MXene material comprises an MXene matrix and an Al2O3 / AlF3 gradient coating layer coating the MXene matrix. And the electrochemical stability, the cycle life and the safety performance are remarkably improved at least on the basis of keeping the high conductivity of the material.

The invention relates to the technical field of nano composite materials, and discloses a method for preparing a quantum dot nano material by using a biological template and a biomimetic synthesis method, which comprises the following steps: a, synthesizing a self-assembled polypeptide nano structure: customizing a polypeptide molecule amino acid sequence, regulating and controlling molecule self-assembly reaction conditions, and synthesizing the self-assembled polypeptide nano structure; step b, adsorption and combination of precursor metal ions: adjusting the pH value of the synthesized self-assembled polypeptide nanostructure solution, and then adding the precursor metal ions, so that the precursor metal ions and the polypeptide nanostructure are subjected to adsorption and electrostatic combination, and a polypeptide nanostructure / metal ion hybrid is formed; c, biomimetic synthesis of the polypeptide / quantum dot composite nanomaterial: adding a reducing agent and a sulfide solution into the polypeptide nanostructure / metal ion hybrid solution synthesized in the step b to prepare the polypeptide / quantum dot composite nanomaterial; the preparation method has the advantages of environment friendliness, high biocompatibility, low cost, capability of regulating and controlling the size and morphology of the material and the like.

The invention discloses application of a monoclonal antibody 2F5 in autoimmune diseases and regulation and control of B cells, the monoclonal antibody 2F5 is obtained from SLE peripheral blood, and it is proved for the first time that the monoclonal antibody 2F5 can promote proliferation, activation and differentiation of the B cells through primary cell and cell line experimental models. The antibody provided by the invention is completely humanized and clear in targeting, can well simulate the blood microenvironment of the high-titer autoantibody in the peripheral blood of an autoimmune disease patient, is an ideal tool for defining the biological function of the autoantibody and researching the regulation and control of the autoantibody on the activation and differentiation of B cells, is beneficial to deepening the understanding of a mechanism causing immune disorder, and has a good application prospect. Therefore, the treatment intervention of immune pathological diseases caused by abnormal differentiation of B cells becomes possible, and an important foundation is laid for developing a new target spot of targeted pathogenic B cells for treating autoimmune diseases and tumors.

The embodiment of the invention provides a correction method and device for a pan-tilt camera, electronic equipment and a storage medium, and relates to the technical field of image processing, and the method comprises the steps: obtaining a first preset position of the pan-tilt camera, a first focal length list, and shooting parameters and reference images of a plurality of preset focal lengths; under the condition that the pan-tilt camera is erected at the first preset position, selecting a current preset focal length to be processed from the first focal length list according to a sequence from small to large, and acquiring an image of the target scene by using the pan-tilt camera to obtain a to-be-detected image; comparing the to-be-detected image with the reference image to obtain a deviation angle of the PTZ camera under the preset focal length, and correcting the PTZ camera based on the deviation angle; the current to-be-processed preset focal lengths are selected from the first focal length list according to the sequence from small to large until the PTZ camera is subjected to deviation correction under all the preset focal lengths. According to the embodiment of the invention, the correction effect of the PTZ camera is improved.

The invention provides a preparation method of a multi-component structure gradient material and a gradient structure, and relates to the technical field of functional gradient structural design, the preparation method comprises the steps that a component gradient model and a structural gradient model are built through simulation software, the component gradient model comprises a plurality of single-component wafers with different densities, and the structural gradient model comprises a plurality of single-component wafers with different densities; the structure gradient model comprises a plurality of regulation and control structure elements with the same size; a plurality of regulation and control structure elements are arranged on the upper surface of the component gradient model in a preset arrangement mode, so that a multi-component gradient structure model is formed, and the sectional area of the structure element model is gradually increased from the direction away from the component gradient model to the direction close to the component gradient model; and the multi-component gradient structure corresponding to the multi-component gradient structure model is prepared on the basis of printing parameters and the 3D printing technology, the printing parameters comprise the single-component wafer layer thickness, the exposure intensity and the printing speed, and the impedance adjustable range of the structure gradient material can be improved easily.

The invention relates to the technical field of LNG (Liquefied Natural Gas) sampling analysis, and discloses an LNG low-temperature sampling analysis device which comprises a gas analyzer, the gas inlet is formed in the gas analyzer; the gas storage tank is mounted on the gas analyzer and is arranged opposite to the gas inlet; the support is fixed on the gas storage tank, and a penetrating opening is formed in the support; the air pipe is fixed at the top end of the air storage tank and is communicated with the interior of the air storage tank; the valve is mounted on the air pipe; and the air supply structure is arranged in the air storage tank. Automatic sample feeding of natural gas is achieved through a mechanical structure, extraction is conducted without depending on an air pump, so that the overall cost of detection equipment is reduced, meanwhile, the design avoids the harmful effects such as noise, vibration and energy consumption possibly generated during operation of the air pump, the comfort level of the detection environment is improved, and the detection efficiency is improved. And the reliability and the stability of the equipment are further enhanced.

The invention relates to the field of modified nano silicon dioxide particles, and discloses a method for strictly regulating and controlling the surface partition size of the modified nano silicon dioxide particles. The method comprises the following steps: pumping an organic silicon source solution and a catalyst solution into a microfluidic synthesis device, reacting the obtained mixed solution, and separating to obtain nano silicon dioxide particles; the particles are in contact with a hydrophilic modifier to serve as an inner phase, a hydrophobic modifier is in contact with an oil solvent to serve as an outer phase, the inner phase and the outer phase are pumped into a microfluidic modification device to obtain a water-in-oil emulsion, the flow velocity of the inner phase and the flow velocity of the outer phase are 50-400 [mu] L / h and 300-5000 [mu] L / h respectively, and the mass concentration of the inner phase and the mass concentration of the outer phase are 0.1-5% and 0.1-5% respectively; and carrying out oxidation reaction on the product obtained after the water-in-oil emulsion reaction to obtain the modified nano silicon dioxide particles. According to the method, the modification area of the nano silicon dioxide particles is accurately regulated and controlled by regulating and controlling the flow velocity and the concentration of the internal phase and the external phase.