521 results about "Granular material" patented technology

A batch feeding-based multi-stage screening device for granular materials, comprising a housing (1). A quantification assembly (2) is installed at the top of the housing (1), a dust removal assembly (3) is installed outside the housing (1), and an anti-blocking assembly (6) is installed inside the housing (1); the dust removal assembly (3) comprises a mounting plate (305) and a fixed column (304); the mounting plate (305) and the fixed column (304) are both fixedly connected to the outside of the housing (1), a rack plate (306) is slidably connected to the outer surface of the mounting plate (305), a movable rod (311) is fixedly connected to the bottom end of the rack plate (306), a rubber piston (312) is fixedly connected to the bottom end of the movable rod (311), and a filter box (301) is fixedly connected to the outside of the housing (1). A large amount of dust on the surface of rice grains can be adsorbed, filtered and removed by means of the dust removal assembly, thereby improving the quality of rice.

The invention discloses a breakable rock-soil granular material triaxial test simulation method based on a lattice spring-discrete element coupling framework, which comprises the following steps: establishing a triaxial test model rectangular boundary condition, and generating a non-breakable spherical rock-soil granular material in the boundary; replacing the generated non-crushable spherical particle material with rock-soil particles considering particle crushing based on a lattice spring-discrete element coupling frame, and assigning parameters; replacing wall bodies on the two sides of the rectangular boundary condition with a large number of bonded spherical particles to generate a flexible membrane boundary; and applying confining pressure to the boundary of the generated flexible membrane, and carrying out shear simulation. According to the method, the Young modulus and the Poisson's ratio can be matched in a high-precision mode, the heterogeneity of elastic response is reduced, strength degradation and friction characteristics are simulated, and the calculation efficiency is greatly improved.

The invention provides a mixed material quality prediction method and device based on a discrete element method and data driving, and relates to the technical field of granular material mixing, the method utilizes the discrete element method to construct a physical simulation model in a mixing process, can accurately simulate mixing behaviors of granular materials in different mixing devices, and covers various process parameters. And a data driving technology is introduced, a machine learning algorithm is utilized, and a large amount of high-fidelity data generated by DEM simulation is utilized to train a prediction model, so that a hybrid model fusing a physical mechanism and data intelligence is constructed. According to the model, the mixing effect index can be quickly and accurately predicted according to the input mixing process parameters, the corresponding optimal process parameters can be reversely predicted, and the production efficiency is effectively improved. The method aims at solving the problems that in an existing material mixing process, optimization depends on experience, efficiency is low, cost is high, and the material mixing effect is difficult to accurately predict.

A granular material flow control system includes a granular material supply, a discharge head in fluid communication with the granular material supply, and a pan positioned beneath the discharge head to receive granular material discharged from the discharge head, the pan comprising a first end portion and a second end portion. A flow regulator conduit is coupled to a weight sensor, the flow regulator conduit having an inlet opening and an outlet opening, the second end portion of the pan being received in the inlet opening of the flow regulator conduit. A vibratory feeder is coupled to the pan and configured to vibrate the pan to induce granular material in the pan to flow off of an edge of the second end portion into the flow regulator conduit.

The invention relates to the technical field of intelligent warehousing, in particular to a multi-grading granule automatic output system and a using method, a discharging port of a discharging hopper is always located at the rotating center of a second-stage climbing belt conveyor relative to a horizontal belt conveyor, and the falling material stress receiving position of the horizontal belt conveyor is not changed; a discharging hopper on a horizontal belt conveyor is positioned through a discharging hopper laser positioning instrument, and the position of equipment with walking and shoveling functions is accurately solved in cooperation with angles measured by a discharging hopper angle encoder and a traction hole angle encoder; particulate matter monitoring of the stock bin and the collecting hopper is carried out through the three-dimensional laser scanning radar, the high-position laser range finder and the low-position laser range finder, a sensor for detection does not need to be arranged on equipment with walking and shoveling functions, and the equipment with the walking and shoveling functions can be positioned without depending on the sensor arranged on the equipment; therefore, even if a large amount of dust is generated in the particle material conveying process, automatic operation of the output system cannot be hindered.

To properly guide a flow of granular material to a probe in a measuring system for measuring characteristics of the granular material separated from gas by a cyclone separator.SOLUTION: A separation system includes: a cyclone that separates granular material from mixed fluid containing a gas and the granular material; a container that has a truncated conical portion whose diameter gradually decreases downward and is connected to a granular material outlet of the cyclone so that the granular material separated by the cyclone falls while swirling; a conical cone disposed in the container; and a measurement probe that has a measurement unit disposed downstream of a flow of the granular material passing between a lower end of the cone and an inner wall of the container and measures a particle diameter of the granular material passing through the measurement unit.SELECTED DRAWING: Figure 1

The invention provides a system calibration and verification method for a discontinuous graded cohesive soil DEM model. The system calibration and verification method comprises the following steps: (1) preliminarily determining microscopic parameter values of the DEM model; (2) sensitivity analysis of microscopic parameters of each DEM model; (3) gradually optimizing and iteratively analyzing each factor in combination with a sensitivity analysis result to obtain a microscopic parameter optimization value range of the DEM; (4) further optimizing the microscopic parameters of the DEM model based on Box-Behnken test design to obtain multiple groups of optimization parameter combinations; and (5) parameter verification. The method is reasonable in conception, integrates parameter calibration, precision verification and actual experiments, enables the purpose of parameter calibration to be clearer, can provide a more efficient and directional parameter calibration thought for cohesive soil with complex parameter calibration and fewer references, especially fine-grained soil or granular materials with extremely uneven grain size distribution, and is suitable for popularization and application. And meso-scale parameter calibration under quasi-static stress can be converted into parameter calibration and verification under dynamic load stress simulation.

The invention provides a carbon dioxide capture system based on a calcium-based granular material and a control method of the carbon dioxide capture system. The system comprises a reactor, a decomposition bin, a conveying branch and an input branch, the input branch inputs raw flue gas to the reactor; the conveying branch conveys a calcium-based particle material to the reactor by using the heated flue gas; the reactor is used for controlling the internal temperature by selecting the raw flue gas input by the input branch so as to control the adsorption reaction; the decomposition bin is used for controlling the movement of the supporting plate under the mechanical action and the air pressure action so as to guide the flowing of the materials and further control the desorption reaction. A set of complete and ingenious heat circulation process and material circulation process is constructed, the circulation processes are linked with each other, the structural design is ingenious and practical, and while efficient adsorption and desorption of carbon dioxide are guaranteed, the energy utilization efficiency is improved, the energy consumption is reduced, and the equipment maintenance cost and the energy purchase cost are reduced.

The invention discloses a coarse and fine particle inclusion photoelastic sample preparation and contact force chain network analysis method, and relates to the field of particle material mechanical tests, and the method comprises the following steps: calculating target void ratios under different coarse particle contents through a discrete element method; generating a corresponding numerical calculation sample according to the target void ratio and the preset coarse grain content, and exporting related parameters to prepare a coarse and fine grain inclusion photoelastic sample with the same initial compactness; in combination with non-polarization and polarized photoelastic images of the photoelastic sample, extracting intergranular contact force and constructing a contact force network; based on the contact force network, a strong contact force network is extracted and microscomic analysis is carried out, and force transmission characteristic comparison results under different coarse grain content conditions are obtained. According to the method, preparation efficiency of samples with different coarse grain contents and controllability of an initial state are realized, an influence rule of the coarse grain contents on a force chain structure and force transmission characteristics thereof is disclosed based on analysis of a contact force chain network, and the method is of great significance in researching a force transmission mechanism of a coarse and fine grain inclusion system and microstructure characteristics thereof.

The invention discloses a preparation and quality detection device and method for uniformly layered granular materials with different compactness, and belongs to the technical field of geotechnical test equipment.The device comprises a receiving container arranged on an inner supporting frame, the receiving container is connected with a diffuser through a control valve, and a miniature CPT device is arranged between the diffuser and the inner supporting frame; the top of the receiving container is connected with a hopper through a flexible hose, and the hopper is arranged on the top of the outer supporting frame. A porous plate structure in the diffuser is used for controlling the deposition strength, particle distribution is monitored through a micro pressure sensor and a high-speed camera, the aperture is adjusted, multi-dimensional characteristic in-situ detection is achieved by means of multiple sensors of a micro CPT device, and parameters are optimized and optimal deposition parameters are predicted through a controller. According to the preparation and quality detection device and detection method for the layered uniform granular materials with the different compactness, the deposition strength and particle distribution can be accurately controlled, multi-dimensional detection and automatic control are achieved, the test precision and efficiency are improved, and manual errors are reduced.

Seed on-demand system for granular material comprising at least one storage container for granular material, at least one fan to provide a conveyor air flow, and a distributing device with a distributor housing which is designed to receive material from the storage container by means of a material inlet opening and has a conveyor air opening to direct the conveyor air flow in the direction of the material received to generate a mixed flow of conveyor air and material, and at least one distributing segment which forms at least one first conduit with a first receiving opening and a first outlet opening, wherein the conduit is arranged to receive at least a part of the mixed flow by means of the receiving opening and to discharge it from the outlet opening. To avoid disturbances in the distribution of the material and simultaneously generate the mixed flow in an energy-efficient manner, it is provided that at least one stirring element is arranged between the material inlet opening and the first receiving opening to loosen the material in the area where the conveyor air flow is directed onto the material.

The invention relates to the technical field of geotechnical engineering grade tunnel engineering, and provides a pea gravel hydraulic reclamation process simulation method and system based on discrete elements and application. The method comprises the following steps: S1, determining size parameters of a shield tunnel, macromechanical parameters of duct pieces and surrounding rocks, a hydraulic reclamation position and hydraulic reclamation pressure; s2, determining particle size distribution of pea gravel particles and mesomechanical parameters of pea gravel; s3, constructing three-dimensional models of duct pieces, surrounding rocks, hydraulic reclamation pipes and the tail part of the shield tunneling machine; s4, constructing a pea gravel hydraulic reclamation pressure implementation model; and S5, realizing the model by utilizing the pea gravel hydraulic reclamation pressure, and realizing simulation of the pea gravel hydraulic reclamation process of the single-ring duct piece in a step-by-step hydraulic reclamation mode. The device can simulate the process that pea gravels are continuously blown into gaps, is suitable for research on simulation of mechanical behaviors of discrete granular materials, and has important practical value.

The present application relates to a kind of internal heating type continuous rotary heating process and device, device includes self-heating graphite tube rotary drum, electrode bar, the inner cylinder of the self-heating graphite tube rotary drum is graphite tube, both ends of the graphite tube are connected electric slip ring, and are heated by electrode bar power supply.The present application provides a kind of internal heating type continuous rotary heating device compared with prior art, the inner cylinder of the self-heating rotary kiln of the present application adopts graphite material, graphite cylinder both ends adopt slip ring power supply, graphite tube relies on its resistance heating, and heating electric power is adjusted according to set furnace temperature.The furnace temperature of the present application can be high, can be low, from several hundred degrees to thousands of degrees (2000 ℃ above) can be continuously adjusted, heated material can be powder or granular material, protective gas is inhaled in furnace, presents slightly positive pressure or slightly negative pressure, since it can be isolated air, especially suitable for the coating of carbon material, low-temperature carbonization, high-temperature carbonization can also realize the heating treatment of other materials.

The invention relates to the technical field of bulk material discharging equipment, in particular to an AI automatic loading device. Comprising a stock bin, a connecting pipe and a liftable blanking pipe, a mounting ring is rotatably mounted in the connecting pipe, a foldable material distributing hopper is arranged on the mounting ring, a bendable connecting piece I is connected to the upper end of the material distributing hopper, the tail end of the connecting piece I is fixedly connected with the inner wall of the connecting pipe, and a supporting rod used for supporting the connecting piece I is mounted on the connecting pipe in a sliding manner in the radial direction; a negative pressure pipe coaxially arranged is suspended outside the connecting pipe, a plurality of air pipes are arranged on the inner wall of the negative pressure pipe, air ports in one-to-one correspondence with the air pipes are formed in the outer wall of the connecting pipe, and a sealing ring is rotationally installed on the outer wall of the connecting pipe. Aiming at particle materials, the material distributing hopper is opened to disperse the materials; and for powdery materials, the distributing hopper is folded and stored, so that the situation that dust raising is enhanced due to excessive dispersion of the powdery materials is avoided. When the material distributing hopper is folded, the negative pressure pipe is isolated from a connecting channel of the connecting pipe through the sealing ring, and flying dust is prevented from falling into a negative pressure adsorption system in the pipe.

The invention relates to a particle material form change-based crusher state monitoring method, medium and equipment, and the method comprises the steps: obtaining the historical point cloud data of a particle material in a crusher, marking the state of the crusher at each historical moment, and extracting the form parameters of the particle material according to the historical point cloud data; comprising morphological parameters of all particles, correlation parameters among the particles, morphological parameters of materials composed of the particles and spatial parameters between the materials and a crusher, and according to the crusher state marked by historical point cloud data and the extracted morphological parameters of the particle materials, constructing and training a model which takes the morphological parameters of the particle materials as input and takes the morphological parameters of the particle materials as output; the state of the crusher is an output monitoring model, current point cloud data is obtained, the morphological parameters of the current particle material are extracted and input into the trained monitoring model, and the state of the crusher is obtained. The problems that in the prior art, accuracy is insufficient, the data processing capacity is weak, cost is too high, environment influence is likely to happen, and adaptability is poor are solved.

The invention relates to the technical field of mixing, in particular to particle material mixing and stirring equipment which comprises a stirring barrel and a stirring device. The stirring device comprises a rotating ring and a one-way assembly; the rotating ring is rotationally mounted on the stirring shaft; a plurality of stirring blade assemblies are annularly distributed on the side wall of the rotating ring; when the stirring shaft rotates, the one-way assembly enables the rotating ring to drive the stirring blade assembly and the stirring shaft to rotate synchronously, and when the stirring shaft stops rotating and materials rotate the rotating ring through the stirring blade assembly under the inertia effect, the one-way assembly allows the rotating ring to rotate relative to the stirring shaft, so that when the stirring shaft stops rotating, the rotating ring rotates synchronously. Impact force of materials acting on the circumferential direction of the stirring shaft due to inertia is buffered, and the stirring shaft is prevented from being damaged due to impact.

The invention relates to the technical field of extruders, and provides a wire and cable processing extruder which comprises a rack. The charging barrel is arranged on the rack and is provided with a feeding hole and a discharging hole, and the charging barrel is provided with a heating section; the screw rod is rotationally arranged in the charging barrel; the extrusion cylinder eccentrically sleeves the screw rod and is positioned in the heating section, and an extrusion space is formed between the outer wall of the extrusion cylinder and the inner wall of the charging barrel; the extrusion convex ring is arranged on the inner wall of the charging barrel and is positioned in the extrusion space; and a discharging gap for molten materials to pass through is formed between the extrusion convex ring and the extrusion cylinder, and when the extrusion cylinder rotates eccentrically, the extrusion convex ring can be matched with the extrusion cylinder to grind unmolten particle materials. By means of the technical scheme, the technical problems that in an extruder in the prior art, due to the fact that materials cannot make full contact with the heating section, the material melting efficiency is low, part of the materials cannot be completely melted possibly, and the cable product coating quality is affected are solved.

Implementations disclosed herein are directed to a curved spreader disk for spreading a granular material. In some implementations, the curved spreader disc may include: a concave curved disk with a plurality of fins radiating outward from a center of the curved disk. Each of the fins may includes a substantially straight inner area near to the center of the curved disk for catching granular material and a curved outer area to accelerate movement of the granular material. The substantially straight inner area may transition the granular material from a vertical movement to a horizontal movement.

The invention provides a landslide monitoring device and method based on acoustic emission characteristics of granular materials, and relates to the field of geological disaster prevention and control, the landslide monitoring device comprises a waveguide rod, an acoustic emission monitoring unit and an analysis unit, a geological drill hole is divided into at least two hole sections from bottom to top, and each hole section is filled with the granular materials; the diameters and / or materials of the granular materials in different hole sections are different; the acoustic emission monitoring unit can monitor acoustic emission information of the granular material in each hole section, and the acoustic emission information comprises a plurality of acoustic emission characteristic parameters; the acoustic emission information of the granular materials in different hole sections at the same sliding speed is different; the analysis unit is in signal connection with the acoustic emission monitoring unit; and the analysis unit can judge whether landslide deformation is generated or not according to the acoustic emission information, and obtain the type of the granular material in the hole section where the landslide deformation is generated and / or the depth of the slip surface. According to the invention, low-cost and continuous monitoring of deep displacement can be realized, and meanwhile, the depth of a slip plane when a landslide occurs can be judged.

The present disclosure describes embodiments of a permanent deformation model for soils and granular materials with the application of the Shift Factor (SF) concept. The model was structured following the guidelines provided by the standard DNIT 179, but with the modification of the number of loading cycles and the stress pairs to be applied. Instead of 150,000, 10,000 load cycles were used for each stress pair, with the exception of the most severe pair, for which 150,000 load cycles continued to be applied. From the results obtained for each stress pair, there is constructed a master curve representative of one of the test stress pairs, selected as a reference. Embodiments of the present disclosure finds its field of application in the characterization of the permanent deformation of soils and granular materials.

The invention relates to a saturated granular material liquefaction deformation calculation method based on a state evolution model, which comprises the following steps: establishing a saturated granular material liquefaction state evolution model, and setting a state parameter representing system fluidity in the state evolution model as a weighted average value of a historical strain rate function and an excess pore water pressure change rate function; analyzing and determining a shear strain time travel curve, a stress strain curve and a state parameter evolution curve according to the state evolution model; and carrying out saturation granular material liquefaction discrimination according to the state parameters. According to the saturated granular material liquefaction deformation calculation method based on the state evolution model, the Davidenkov model and the unified softening model are introduced to describe shear modulus softening, the liquefaction deformation calculation method is provided, and finally the accuracy of the calculation method is verified through a series of experimental data and simulation data.

The present disclosure relates to a mixing system that includes an injector body comprising a first flow path configured to transmit a motive fluid, a second flow path configured to transmit a granular material, and a diffuser configured to transmit and mix the motive fluid of the first flow path with the granular material of the second flow path. A flexible vessel includes a closed end, an open end, and an interior volume configured to hold a granular material. The open end is configured to couple to the injector body at or adjacent the second flow path. A pressurized fluid inlet is configured to fluidly couple to the second flow path and configured to transmit a pressurized fluid to at least one of the interior volume of the flexible vessel and the second flow path.

Grout pipes placed within a fill could be damaged by the fill as it is being placed over the pipe, the pipe needs protection until it is used. In addition, the grouting pipes needs multiple outlets to ensure that the grout flows through the voids in the fill. This patent provides a method similar burrito drainage system where filter cloth is wrapped around a drainpipe encased in gravel. This patent provides a similar design but for the opposite purpose. Where fill is placed loose and grouted after placement is complete the grout tube placed within the fill needs protection until the grouting is complete. This is done by surrounding the grout tube with granular material that will carry the load of the fill above around the pipe to ensure the integrity of the pipe and allow grout to flow out through numerous voids in the granular material.

The present invention relates to a low-temperature spray drying device, belonging to the technical field of spray dryers. The low-temperature spray drying device includes a fixing frame and a drying tank fixedly connected inside the fixing frame. A tank cover is installed on the top of the drying tank. A gas treatment mechanism and a finished product collection mechanism are installed on the outer surface of the fixing frame. It further includes: a wall scraping mechanism; a gas guiding mechanism; a filter screen; a crushing mechanism; a conveying mechanism. Through the arrangement of the scraper, the present invention enables the scraper to scrape off the atomized materials adhering to the inner wall of the drying tank and the granular materials adhering to the inner wall of the drying tank that are not dried, avoiding the adhesion of materials on the inner wall of the drying tank, resulting in the aggregation of materials, affecting the particle size of the produced finished product, and causing the particle size of the produced finished product to not meet the requirements. Furthermore, it ensures that the particle size of the produced granular materials meets the requirements and that the moisture content of the produced granular materials meets the production requirements.

A distribution device for granular material having: a distributor housing which has a material inlet opening for the granular material; at least one conveying air duct, situated in the distributor housing, for a material-free conveying air flow, the conveying air duct being connected within the distributor housing to a grain-holding region within which the granular material entering the distributor housing via the material inlet opening can be introduced into the material-free conveying air flow; one or more material flow lines, which adjoin the grain-holding region, for the conveying air flow laden with granular material; and at least one additional air duct, which is situated in the distributor housing for a material-free additional air flow, which can be introduced into the one or more material flow lines via at least one additional air inlet.

The invention provides a granule screening device and a granule screening method. The granule screening device comprises a screening barrel and a supporting frame. Wherein the screening barrel comprises an inlet ring, an outlet ring and a plurality of parallel connecting rods for connecting the inlet ring and the outlet ring. A crushing bin with an upper opening is fixedly arranged on the supporting frame, the crushing bin comprises a first end and a second end which are far away from each other in the first direction, and the first end of the crushing bin is higher than the second end; at least two inlet rollers capable of rotating freely are arranged on the inner side of the first end of the material crushing bin, at least two outlet rollers capable of rotating freely are arranged on the inner side of the second end of the material crushing bin, and the inlet ring and the outlet ring are arranged on the inlet rollers and the outlet rollers in a lap joint mode respectively. According to the technical scheme, the material screening barrel is arranged in an inclined mode and can rotate, so that continuous and automatic particle material screening operation is achieved, the screening efficiency and effect are improved, and meanwhile the pollution risk is reduced.

The utility model relates to the technical field of automatic online detection, and discloses a particle material granularity detection device which comprises a box body, a beating assembly is arranged in the box body, the left side of the beating assembly is fixedly connected with a first gear, the interior of the box body is fixedly connected with a placing plate, the left side of the box body is rotationally connected with a sieve plate, and the sieve plate is fixedly connected with a second gear. Mounting grooves are formed in the front side and the rear side of the box body, first connecting plates are fixedly connected to the front side and the rear side of the sieve plate, two sliding rods are slidably connected to the tops of the first connecting plates, springs are arranged on the outer portions of the two sliding rods in a sleeving mode, and first rubber blocks are fixedly connected to the bottoms of the two sliding rods; second connecting plates are fixedly connected to the front side and the rear side of the box body correspondingly, and a discharging assembly is arranged on the front side of the box body. According to the utility model, particulate matters can be sieved by matching the special-shaped block with the sieve plate, and then the influence on the box body during vibration can be reduced by matching the rubber block I with the rubber block II, so that the noise is reduced.

The invention discloses a dynamic real-time measurement method and device for the friction coefficient in a rotary shear type granular material, and belongs to the technical field of granular material measurement. The dynamic real-time measurement device for the friction coefficient in the rotary shear type granular material comprises a rotary shear rheological experiment cavity which is connected to a bottom plate through a mounting bracket; the filler is filled with a to-be-detected granular material; the normal load monitoring unit comprises an upper pressure sensor and a lower pressure sensor which are located on the upper portion and the lower portion of the rotary shear rheological experiment cavity, in-situ real-time measurement of the internal friction coefficient of the granular material in the shear flowing process is achieved, and the technical problem that the internal friction characteristic of the granular material is difficult to measure through a traditional method is solved. A cooperative working mechanism of an axial constraint type dynamic loading platform, an annular medium distribution structure and a rotary shear rheological experiment cavity is innovatively designed, shear flow in the granular material is achieved, and the internal friction coefficient of the granular material is measured.

The present invention discloses a method for simultaneously characterizing the mechanical properties and microstructure of a single granular body. This method is suitable for simultaneously characterizing the mechanical properties and microstructure of explosive granular bodies and other energetic material crystals or granular materials. The test process includes six steps: sample preparation, sample installation, parameter adjustment of a mechanical-optical microscope combined test system, mechanical-optical real-time monitoring testing, analysis of the granular body's compression performance and optical images, and simultaneous characterization of its mechanical properties and microstructure. A dedicated compression test fixture is designed, and an evaluation basis for the simultaneous characterization of mechanical properties and microstructure is proposed. The present invention monitors the deformation characteristics of a single granular body during compression. The test process is observable, and the test conditions are more scientific and reasonable, improving the accuracy of the characterization. The method is also simple to operate and requires less experimental personnel.

The utility model discloses granule quality detection equipment, and the equipment comprises a machine base which comprises a light-transmitting table top for placing to-be-detected granules and a containing space located at the lower side of the light-transmitting table top; the light source assembly is arranged in the containing space and used for providing first-intensity light and second-intensity light. The grating component is arranged in the accommodating space in parallel with the light-transmitting table top, is positioned between the light source component and the light-transmitting table top, and is provided with light and shade stripes which correspond to the particle size of the to-be-detected granules and are used for dividing light provided by the light source component; the reflecting cover is arranged between the camera device and the light-transmitting table top, is provided with a window corresponding to the camera device, and is used for reflecting the segmented transmitted light to form multi-angle reflected light so as to construct an image acquisition environment for eliminating a false target by using the multi-angle reflected light and the segmented transmitted light; and the camera device is suspended on the upper side of the light-transmitting table top and is used for shooting a detection image of the to-be-detected aggregate.