30 results about "Particle injection" patented technology

The invention relates to the field of numerical simulation, in particular to a porous ceramic model reconstruction and filtering performance simulation method, which comprises the following steps of: S1, obtaining internal structure image data of a ceramic material through micro-CT (Computed Tomography) scanning with micron-level resolution, and reconstructing a real three-dimensional microstructure of the ceramic material; s2, performing REV extraction and dynamic processing on the three-dimensional geometric model generated in the S1; s3, establishing a flow field model on the CFD, and setting corresponding boundary conditions; s4, the DPM is started, a particle injection source is configured, and particle physical parameters are set; s5, bidirectional coupling solution is executed, and high-precision particle motion and deposition process simulation is achieved; and S6, extracting simulation result data, and if the difference between the simulation result and the reference value exceeds a preset threshold value, returning to S4 and / or S5 to carry out parameter adjustment and model correction. According to the method, effective prediction of the particles in the porous structure can be realized.

The invention discloses a grid-control superconducting nanowire low-temperature thermometer and a preparation method thereof, and relates to the technical field of superconducting electronics and low-temperature detection. Comprising a substrate and a superconducting layer, and the superconducting layer comprises a grid electrode, a superconducting nanowire and an inductor; the grid electrode is vertical to the superconductive nanowire, has a distance from the superconductive nanowire and is used for electric field regulation and control; the superconducting nanowire is connected with the inductor and is used for responding to particles injected into the grid electrode and outputting a pulse signal; the inductor is connected with the superconducting nanowire and is used for inhibiting a latch-up effect under high bias current; the superconducting layer material is a superconducting thin film material with a superconducting transition temperature Tc exceeding a measurement temperature zone; according to the invention, (quasi) particle injection in the critical current process of the superconducting nanowire is regulated and controlled through the grid electric field, high-precision measurement of the low temperature is realized in combination with nonlinear response of the pulse counting rate and the temperature, and the device and the method have the advantages of wide temperature zone measurement, low noise, high sensitivity, low power consumption, small self-heating, simple measurement system and low cost.

This application provides a simulation system and method for the AC characteristics of vacuum diodes based on a physical information neural network, belonging to the field of numerical simulation technology for electronic devices. The system includes a particle injection module, a particle deposition module, a Poisson equation solving module, an electric field calculation module, and a particle propulsion module. The particle injection module continuously injects electron particles; the particle deposition module maps particle information to a grid and calculates the electron density; the Poisson equation solving module uses a physical information neural network method to solve for the potential distribution based on the electron density; the electric field calculation module obtains the spatial electric field; and the particle propulsion module updates the particle velocity and position, forming a self-consistent coupled simulation. This application achieves continuous and smooth potential solutions through hard constraint embedding of boundary conditions, two-stage optimization, and loss scale adjustment mechanisms, reducing grid dependence and improving computational accuracy and efficiency. It is suitable for numerical simulation of vacuum electronic devices, electron beam systems, and space charge transport problems.

Systems and methods are provided for locating hydrocarbons near a wellbore, determining petrochemical properties of a reservoir, and assessing hydrocarbon saturation between reservoirs. The nanoparticles can be positively charged and have properties that make them explode upon contacting crude oil. Sensors can be strategically placed near the wellbore to measure micro tremors caused by nanoparticle explosions. When the fluid is pumped into the wellbore, the fluid is forced into the surrounding rock formations. The fluid can contact crude oil in the rock formations, and the nanoparticles can attract to the fluid / oil interface due to negatively charged particles in the crude oil. When the nanoparticles reach the fluid / oil interface, they can contact the crude oil and explode. The seismic sensors can detect micro tremors caused by the nanoparticle explosions. The seismic sensor readings can be superimposed to identify the location of the crude oil and assess hydrocarbon saturation.

The invention belongs to the technical field of petroleum drilling equipment, and particularly relates to a particle injection device for petroleum drilling, which comprises particle tanks, and the particle tanks are double tanks which can be alternately used and are connected in parallel; an outlet pipeline is installed at the lower end of the particle tank, an adjusting pipe and an injection pipe are sequentially installed on the outlet pipeline, a nozzle pipe and a mixing pipe are installed at the two ends of the injection pipe respectively, and the mixing pipe is connected to a main manifold; a spiral plate is mounted in the mixing pipe; a control hose is installed in the adjusting pipe, a control pipe is installed on the adjusting pipe, the control pipe is communicated between the control hose and the inner wall of the adjusting pipe, and the control pipe is connected with an external hydraulic pump. The device is simple in structure, particles in the tank body can be impacted and stirred to prevent the particles from blocking an outlet, meanwhile, the particles are stirred to enable the particles and drilling fluid to be evenly mixed, meanwhile, the particle injection amount is continuously controlled and adjusted, and the concentration of the injected particles is changed.

The invention discloses a biochar particle injection combustion system for a ship boiler. A fuel preparation unit is used for preparing biochar particles from a biochar material; the fuel storage unit maintains the oxygen concentration in a storage bin to be lower than 3% through inert gas so as to ensure safety; the fuel feeding unit is used for forming the biochar particles into fuel and conveying the fuel into the injection unit; the injection unit injects fuel into the combustion and energy conversion unit, and is provided with a pressure monitoring and pressure relief loop to stabilize the safe operation of the system; the combustion and energy conversion unit comprises a combustor used for receiving fuel and feeding the fuel into the boiler through a combustor nozzle for combustion, heat released by combustion is absorbed by the heating surface of the boiler to generate steam for heat supply, and the pressure of the hearth is maintained within a safe range by adjusting the secondary air volume or starting a pressure relief outlet; fly ash enters an ash bin for centralized treatment after electrostatic dust collection is conducted on boiler flue gas, purified flue gas is sucked by an induced draft fan and subjected to tail gas treatment to be discharged after reaching the standard, and efficient and environment-friendly operation is achieved.

The invention belongs to the technical field of data processing, and relates to a neutron generator operation state monitoring method and system based on digital twinning. The method comprises the following steps: acquiring real-time operation electrical parameters to construct a virtual twinborn body; inverting the effective deuterium and tritium atom concentration in the target film in real time by using a physical difference equation containing a particle injection item and a thermal diffusion loss item; a beam spot drift correction factor is determined by calculating the difference between the real-time impedance of the neutron tube and the nominal design impedance, the beam spot area of the virtual twin is dynamically corrected, and the problem of prediction model failure caused by electrode ablation is solved; and finally, on the basis of the corrected state parameters, using a multi-parameter product model to predict the neutron yield and perform health degree diagnosis. Transparent monitoring of the internal state of the neutron tube is achieved, the problem of model distortion caused by beam spot drift is effectively solved, and the prediction precision of the whole life cycle is improved.

The application discloses a single particle injection method and a single particle injection device, and relates to the field of storage. The single particle injection method is suitable for the single particle injection device. The single particle injection device structure comprises a host and at least one single particle injection device. The host receives a starting instruction, and transmits the starting instruction to the single particle injection device. In response to the starting instruction, the at least one single particle injection device generates a field effect, and transmits the field effect to a receiving target. In response to the field effect, the potential state of the receiving target is changed. It can be seen that the embodiment of the application provides a single particle injection method and a single particle injection device. The single particle injection device releases and transmits a field effect to the receiving target. The field effect induces the change of the potential state of the semiconductor device of the receiving target. Moreover, the release, intensity and period of the field effect can be controlled according to requirements, so that artificial single particle injection is realized.

The system for capturing target condensed gas includes a supersonic condensation nozzle configured to receive a gas flow having a predetermined target condensed gas content and for accelerating the gas into a supersonic gas flow; at least one particle injection device within the supersonic nozzle for injecting particles into the supersonic gas flow, whereby target gas condensate is formed on some of the particles; an expansion device that generates an expansion wave in the flow of particles containing the target gas condensate, defining a conduit with a convex corner that separates the flow into a first flow path having particles with a high concentration of target gas condensate and a second flow path of gas with a lower target condensed gas content; and a flow divider having at least the first conduit, the flow divider configured to receive the first flow path.

The invention discloses a method and system for optimizing two-dimensional argon plasma uniformity by introducing a high-energy particle source, and the method comprises the steps: S1, filling a plasma reaction chamber with background gas, and simulating the distribution of neutral particles; s2, initializing the speed and the position of charged particles in the gas in the chamber, enabling the charged particles to be uniformly distributed in the chamber, and determining the intensity, the time sequence, the incident direction and the incident position of high-energy particles emitted by an external particle source; s3, calculation of charged particle density, potential and electric field; s4, calculating the force acting on the charged particles; s5, moving the charged particles; s6, checking and executing collision; and S7, repeating the steps S3 to S6, adjusting the high-energy particle injection time sequence until a steady state is reached, and obtaining the data distribution of the charged particles. Through controllable interaction between an external particle source and plasma or background gas, seed electrons-ions are actively generated in a specific space area or energy distribution is changed, and inherent space non-uniformity of the plasma is compensated.

The invention relates to the technical field of mineral flotation, in particular to a collision probability and desorption probability integrated measuring device suitable for mineral flotation. The device comprises a lower straight pipe, the lower portion of the lower straight pipe is sequentially connected with a bubble generation assembly and a particle injection assembly from bottom to top, the top end of the lower straight pipe is communicated with the bottom of a turbulence box, an inner cavity of the turbulence box is of a two-section structure with the wide lower portion and the narrow upper portion, and a bubble overflow channel and a turbulence area are formed by the narrow portion and the wide section of the inner cavity of the turbulence box respectively. A feeding pipe with an outlet extending to the turbulent flow area and a turbulent flow assembly with a power part extending to the turbulent flow area are mounted on the turbulent flow box. A physical carrier is provided for integrally obtaining the adhesion efficiency after collision of bubbles and particles and the desorption efficiency after adhesion, and the method has important significance in selecting a proper turbulence environment to strengthen collision of fine target mineral particles, reducing desorption of coarse target minerals and further improving the flotation recovery rate.

The application discloses a kind of GIS switch shell inner wall particle injection polishing device, belong to fluid polishing technical field.The application includes support, polishing chamber, feeding robot, several switches to be polished shell, abrasive pool, magnetic filter, air pump, the automatic sliding door is arranged on the polishing chamber, the feeding robot is located in the side of polishing chamber, the device includes barrel seat, the barrel seat is installed on support, the polishing chamber is arranged on barrel seat, the clamping mechanism is arranged on the polishing chamber, the polishing mechanism is arranged in the barrel seat, the air inlet pipe and the discharge pipe are connected on the polishing mechanism, one end of the air inlet pipe is connected with the air supply end of air pump, the middle part of air inlet pipe is provided with siphon, one end of the discharge pipe and siphon is inserted into abrasive pool, the application is lifted by inner thread sleeve driving lifting platform, simultaneously using displacement wheel to let air injection pipe move, realize that air injection pipe is flexibly switched between inside and outside of switch shell and carries out injection polishing.

The present invention generally relates to the field of conformance control in oil fields, particularly to a re-crosslinkable preformed particle gel system, and composition thereof. The composition of the re-crosslinkable preformed particle gel system contains monomers, crosslinkers, a polymer matrix, and additives. Components in the composition for re-crosslinkable preformed particle gel in the present invention have excellent compatibility with each other, and the obtained gel has excellent long term high-temperature resistance property. Different from prior products, in the re-crosslinkable preformed particle gel compositions according to embodiments of the present invention, the components that are used to re-crosslink the particle gels may be grafted on the polymer chain and will act as initiator or secondary crosslinker in different conditions. During particle injection process, all compositions would move together, thereby avoiding chromatographic problems typical of prior products.

The application relates to a drag-reducing particle screening device and method based on a natural gas pipeline, and particularly relates to the technical field of gas drag reduction, which comprises an optical window short section arranged on the natural gas pipeline; the optical window short section is provided with a pulse laser and a high-speed CCD camera; a drag-reducing particle injection end is arranged at the upstream of the optical window short section, and a drag-reducing particle recovery end is arranged at the downstream of the optical window short section, taking the flowing direction of the natural gas as the reference; the pulse laser and the high-speed CCD camera are connected through a laser controller and a synchronization controller; and the high-speed CCD camera is connected with a data processing unit. The drag-reducing particle screening device provided by the application uses the active high-pressure natural gas pipeline as a real working condition test platform, carries out micro-particle gas-solid two-phase drag reduction test, and realizes efficient, reliable and rapid screening and test of micro-particle materials and key technical parameters under real working conditions only by using a small amount of test samples.

This invention belongs to the technical field of oil drilling equipment, specifically a particle injection device for oil drilling, including a particle tank, which is a parallel double tank that can be used alternately; an outlet pipe is installed at the lower end of the particle tank, and an regulating pipe and an injection pipe are sequentially installed on the outlet pipe. A nozzle pipe and a mixing pipe are respectively installed at both ends of the injection pipe, and the mixing pipe is connected to the main manifold; a spiral plate is installed inside the mixing pipe; a control hose is installed inside the regulating pipe, and a control pipe is installed on the regulating pipe, connecting the control hose and the inner wall of the regulating pipe, and the control pipe is connected to an external hydraulic pump; this invention has a simple structure, can impact and agitate the particles in the tank to prevent particles from clogging the outlet, and at the same time, agitate the particles to make the particles and drilling fluid evenly mixed, while continuously controlling and adjusting the particle injection volume to change the concentration of injected particles.

This invention provides a pipeline flow field tracer particle injection system and method for use in gas transmission pipelines. The system includes: a particle injection unit, a laser emission unit, and an image acquisition unit. The pipeline is divided into an injection zone and an emission / acquisition zone according to the particle's direction of travel. The particle injection unit is located in the injection zone and is used to inject tracer particles into the pipeline. The laser emission unit and image acquisition unit are located in the emission / acquisition zone and are respectively used to emit laser light into the detection zone within the pipeline and to acquire particle images of the detection zone. A control unit, connected to the particle injection unit and the image acquisition unit, is used to obtain the effective sampling number of tracer particles based on the particle images and to adjust the particle injection volume within the pipeline according to the effective sampling number. The pipeline flow field tracer particle injection system of this invention has a simple structure, can quickly and accurately adjust the particle injection volume, reduce particle loss, improve experimental efficiency, and enhance the accuracy and safety of the tracer particle injection process.

The invention discloses an anti-radiation trench gate SOI LDMOS device structure, and belongs to the technical field of power semiconductors. The structure comprises a substrate, a buried oxide layer (BOX), a P buried layer, a drift region, a top Ptop region, a body region, a body contact region, a source region, a drain region and a trench gate structure. According to the structure, the P buried layer is arranged above the BOX, the back gate effect under the effect of total dose radiation is effectively restrained, threshold voltage drift and increase of leakage current are reduced, meanwhile, RESURF is formed by the P buried layer and the Ptop region at the top, and the device is kept to have good low-loss performance. The top highly-doped Ptop region can be used as an effective discharge channel of hole current after single-particle incidence, and risks of body region barrier lifting and parasitic triode triggering are reduced, so that the single-particle resistance of the device is enhanced, and the overall anti-radiation hardening level is improved. The method is suitable for high-reliability power electronics such as aerospace, satellite power management and military electronic systems.

The invention discloses a multiphase flow particle jet nozzle structure, and belongs to the technical field of multiphase flow jet structures. The device comprises an outer pipe, an inner pipe, a shunting box, an isolating ring, an injection box and an air injection pipe array, the outer pipe and the inner pipe are coaxially connected, the inner pipe is arranged in the shunting box, the outer pipe is arranged outside the shunting box, at least one air injection inlet pipe is arranged on the lower portion of the shunting box, and the shunting box is connected with the injection box through the isolating ring; the injection box is provided with an inner pipe injection hole and a plurality of air injection pipe outlets, the inner pipe injection hole is connected with the inner pipe, the isolation ring is provided with a plurality of air injection pipe inlets and an air injection pipe array, the air injection pipe array comprises a plurality of air injection pipes, and the two ends of each air injection pipe are connected with the corresponding air injection pipe inlet and the corresponding air injection pipe outlet respectively. The problem that the quality of a wind tunnel test flow field is affected due to the accumulation phenomenon of solid particles such as ice crystals and sand dust in the jetting process at present is solved, and particle aggregation caused by advanced mixing in the nozzle is avoided.

This invention relates to a Faraday cup with high electron collection efficiency, comprising a collection cavity, a permanent magnet, and a particle injection channel. An inclined surface is provided inside the collection cavity near the side wall, creating a conical space with a gradually increasing volume from the inlet to the bottom of the cavity, which alters the collision direction of particles within the cavity. The permanent magnet is located outside the collection cavity and generates a magnetic field to change the trajectory of incident and secondary electrons within the cavity. The particle injection channel is located at the inlet of the collection cavity. The first end of the particle injection channel connects to the inlet of the collection cavity, and the second end has a suppression electrode located at the front end of the second end of the particle injection channel. The advantages of this invention are that it allows electrons to collide with the inclined side wall, reducing reflected electrons emitted towards the cup opening, and the permanent magnet alters the electron path, reducing escape and improving electron collection efficiency.

The invention belongs to the technical field of functional nanofiber membrane preparation, and particularly relates to a device and a method for dynamically adding functional particles on line in solution blowing spinning. According to the device and method for dynamically adding the functional particles on line in the solution blowing spinning, by arranging a spinning assembly, a particle injection assembly, a pneumatic shearing assembly and a control assembly, 1, the particle injection assembly is controlled by the control assembly to enable the particles to be injected into spinning jet flow in a discrete mode at a specific moment, and the spinning jet flow is controlled by the pneumatic shearing assembly; therefore, the agglomeration phenomenon of the particles in the conveying and injection process is reduced; 2, the pneumatic shearing assembly constructs an airflow field on the periphery of the spinning jet flow, and applies transverse aerodynamic force to the spinning jet flow, so that particles entering the spinning jet flow are diffused in the radial direction, the spatial distribution of the particles in the fiber forming process is improved, the phenomenon that the particles are gathered in the center of a fiber membrane is reduced, and the fiber membrane yield is improved; and the distribution uniformity of the functional particles in the fiber membrane is improved.

The application discloses a method for evaluating self-adaptive gel particle injection and plugging of low-permeability oil reservoirs, which adopts a large-displacement constant-flow pump to inject the material, so that the shearing of the material through the sandstone porous medium is closer to the actual situation of an oilfield site; meanwhile, the low-permeability layer and the fractured layer are separated and evaluated through a multi-stage series connection mode, the migration degree of the material and the retention and plugging situation of the material to the fractured layer are quantitatively calculated, and the comparison test is carried out under the same low-permeability oil reservoir geological conditions, so that the relatively simple, fast and accurate material suitable for the application of the target oil reservoir geological conditions is screened out, the material is closer to the real situation of the oil reservoir, the evaluation is more comprehensive and more accurate, and the method can effectively guide the formulation and on-site implementation of the injection process of the pore self-adaptive gel particle in the low-permeability oilfield site.

This invention provides an experimental system and method for measuring the migration and deposition behavior of low-density particles, belonging to the technical field of particle migration and deposition measurement research. It solves the problems of low-density particles struggling to stably enter a pipeline along a predetermined path and the easy confusion between bubble signals and particle signals. It includes a main loop, a Venturi addition branch, a pumping branch, a first venting branch, a second venting branch, and a visualization system. The main loop includes a storage tank, a main loop regulating valve, a circulating pump, a first pressure stabilizing chamber, a main loop ball valve, an experimental section, a second pressure stabilizing chamber, and a flow meter. The Venturi addition branch includes a Venturi particle addition device, a first addition branch ball valve, and a second addition branch ball valve. The Venturi particle addition device includes a Venturi tube and a feeding cylinder, with the feeding cylinder connected to the throat of the Venturi tube. A particle injection port and a solution injection port are located above the feeding cylinder. This system enables the injection of low-density particles and the observation of their migration and deposition behavior in the experimental section.

The application discloses a simulation method for tokamak neutral beam injection and fast ion deposition. In the numerical simulation of the neutral beam particle injection and ionization process in a tokamak device, the physical parameters of the neutral beam injection device are determined first, then the injection source is simplified by using a narrow particle beam model, the neutral beam particle density of a reference point given under geometric conditions is calculated, the average free path of the neutral beam particle ionization is calculated after the parameters of the position of the reference point in the plasma interior are obtained, the ions in different regions are divided by using a non-uniform grid and are given different weights, and finally the simulation process of the neutral beam injection is realized. The application realizes the simulation of the injection process of the neutral beam particles by using the narrow particle beam model, can obtain the neutral particle and fast ion distribution at any position in the plasma, has high calculation efficiency and strong numerical stability, and is a stable and efficient numerical simulation method.

The invention provides a polyethylene composite material based on high-energy particle injection and a modification method. The modification method comprises the following steps: firstly, selecting metal particles, ceramic particles or a mixture thereof with the size of 0.5-10 microns as injection particles; cleaning and naturally drying the surface of the polyethylene material to remove impurities and particles; injecting the selected particles into the polyethylene material by using a high-energy particle injection device; then the polyethylene material injected with the particles is subjected to rolling treatment through a rolling device, so that the performance of the material is further optimized; and finally checking the surface of the polyethylene material under natural light so as to judge whether injection is successful or not. The method can effectively improve the performance and quality of the polyethylene material. The mechanical property and functional adaptability of the material are remarkably improved on the premise that the crystal morphology is not changed by precisely regulating and controlling the material property and keeping the matrix integrity, and the method is suitable for special working conditions and has remarkable process compatibility and cost effectiveness.

The invention discloses a plasma constrained mode conversion control method based on boundary particle injection assistance, and relates to the technical field of constrained mode conversion control, and the method comprises the steps: calculating an initial set value of a power threshold through a built-in prediction model of a control unit based on the operation parameters of a current plasma, and entering a closed-loop control stage; in the closed-loop control stage, real-time plasma parameters are obtained through a diagnosis module; calculating a real-time power threshold value based on the plasma parameters, and comparing the real-time power threshold value with an initial set value to obtain a comparison result; according to a comparison result, dynamically adjusting injection parameters of a neutral particle injection module for injecting neutral particles into the plasma boundary region and heating power of a heating module for injecting energy into the plasma through a control unit in different control modes; the problems of high power dependence, inaccurate control and unstable conversion in the prior art are solved, and efficient and adaptive L-H conversion is realized.

The application discloses a kind of single particle effect software simulation methods and systems for FPGA, comprising: for FPGA, signal list possibly occurring single particle effect is determined;Single particle simulation module is set for signal list Single particle injection position and time;According to single particle injection position and time, generate the test case of simulated single particle injection;Single particle effect simulation controller, load test case into FPGA and run FPGA simulation;Result analysis module observes corresponding FPGA signal at single particle effect injection moment;Result analysis module analyzes single particle effect injection simulation result and generates traceable waveform;After completing the test case, single particle effect simulation controller controls single particle simulation module, generates next test case, until the test case of all signals in signal list is completed.The application can greatly reduce single particle effect simulation time, effectively improve single particle effect simulation efficiency, while improving the coverage of single particle effect simulation.

An equivalent fault injection method for simulating single-event soft errors (SEE) in integrated circuits is proposed. Based on the analysis of particle injection location distribution and fault introduction mechanism in ground accelerator tests, the analysis of the proportion of single-event sensitive areas in each unit circuit of the chip integration, and the quantity proportion analysis, the method provides support for determining the input conditions for chip-level SEE simulation through an equivalent fault injection sample set sampling method, thereby more accurately simulating the cross-section of SEE in integrated circuits caused by ground test particles.

A method for manufacturing ceramic matrix composites (CMC) and CMCs made by the method are disclosed. The method can be a manual process or an automated process, such as using a robotic system, that is used for controlled delivery of ceramic particles in a CMC fabric. The method includes identifying voids present between adjacent tows of the CMC fabric and dispensing ceramic particles into the voids. Applying the ceramic particles in the center of the voids reduces the size and volume fraction of the voids / defects, improving the homogeneity of surface texture of the preform, homogeneity of microstructure, and part model shape conformity. The method for manufacturing CMCs creates CMCs having a homogenous distribution of small pores after matrix formation that improves the interlaminar mechanical and thermal properties of the CMCs.

The present application belongs to the technical field of data processing, and relates to a neutron generator running state monitoring method and system based on digital twinning. The method collects real-time running electric parameters to construct a virtual twin; a physical difference equation containing a particle injection term and a thermal diffusion loss term is used to real-time inverse the effective deuterium-tritium atom concentration in the target film; the difference between the real-time impedance of the neutron tube and the nominal design impedance is calculated to determine the beam spot drift correction factor, and the beam spot area of the virtual twin is dynamically corrected to solve the problem of prediction model failure caused by electrode ablation; finally, based on the corrected state parameters, a multi-parameter product model is used to predict the neutron yield and perform health degree diagnosis. The present application realizes the transparent monitoring of the internal state of the neutron tube, effectively solves the model distortion problem caused by beam spot drift, and improves the prediction accuracy throughout the life cycle.

The application relates to a cavity surface detection method and system, a storage medium and an intelligent terminal, relates to the field of mold detection technology, and comprises the following steps: acquiring order information; after receiving the order information, placing a preset part model on a to-be-detected mold before die casting, and leaving a preset gap between the part model and the cavity surface of the to-be-detected mold, and pasting sealing pieces on both sides and the lower side of the gap; acquiring sand particle injection amount information; acquiring sand particle outflow amount information; comparing the sand particle injection amount information with preset gap volume information; if the sand particle injection amount information is greater than the preset gap volume information, cavity surface recess information is output; if the sand particle injection amount information is equal to the preset gap volume information, cavity surface normal information is output; and if the sand particle injection amount information is less than the preset gap volume information, cavity surface protrusion information is output. The application has the purpose of detecting before die casting through the injection amount of sand particles, the detection process does not need to be observed by people, the labor cost is saved, and the accuracy and efficiency of detection are improved.