111results about How to "Solution depth" patented technology

The invention discloses a knowledge base-based three-dimensional X-ray computed tomography (CT) detection system. The system comprises a data acquisition module, a slice reconstruction module, an image segmentation module, an image registration module, a defect detection module and a knowledge base management module, wherein the data acquisition module is used for acquiring CT projection data; the slice reconstruction module is used for reconstructing a two-dimensional slice according to the acquired CT projection data and recovering a slice CT image; the image segmentation module is used for segmenting the CT image information of an important part of the chip for the slice CT image; the image registration module is used for performing registration on the CT image to be detected and the standard CT image and finding out the correspondence between the two to realize comparability of the corresponding parts; the defect detection module is used for extracting CT image characteristic of a chip to be detected, comparing with corresponding characteristic of the standard CT image of the chip in a knowledge base and judging whether the chip to be detected is defective and judging the type of the defect. The system and the method are accurate in defect positioning and high in quality detection accuracy.

The invention relates to a biological multimode picture detecting technique, wherein it comprises one PET shooting system with symmetry electrodes, one infrared transparent (reflective) shooting system, one visual light (or fluorescent) transparent (or reflective) shooting system, one ultraviolet (or X-ray) transparent (or reflective) shooting system, one rotation carrier of animal, multi-axle motion controller, multi-channel processor and computer. The carrier comprises one object platform, one frame, one constant-temperature controller, one rotator, and one XYZ three-dimension mover. The invention has multimode composition and 360degree scanning picture, with low cost.

The invention discloses a data fusion method used for a multi-frequency multichannel ground penetrating radar. As for original continuous section scanning data of the multi-frequency multichannel ground penetrating radar, the data of each channel are subjected to scanning channel zero correction and scanning channel actual measurement position correction to obtain multi-frequency multichannel radar data of corresponding positions in a scanning section; the radar scanning channel data of each channel at the corresponding position are subjected to time-frequency analysis to obtain multichannel radar signals in a time-frequency domain; the corresponding radar scanning signals of different channels are subjected to synthesis in the time-frequency domain to obtain time-frequency domain radar data, synthesized by the radar scanning signals of the different channels, for each scanning channel position; the synthesized time-frequency domain radar data are subjected to inverse time-frequency transform according to the scanning channels sequentially to obtain a time-domain multi-frequency fusion radar image. The data fusion method has the advantages that the data of the multi-frequency multi-channel ground penetrating radar can be fused effectively, and prospecting capabilities with larger prospecting depth and higher resolution ratio can be achieved by means of making full use of the multi-frequency multi-channel radar signals.

A welding method for U-shaped ribs of an orthotropic deck plate of a bridge girder comprises the following steps that: 1) bevels are formed at the outer sides of the U-shaped ribs, each truncated edge P is 1-3mm, and the angle alpha of each bevel is 45-55 degrees; 2) the U-shaped ribs are longitudinally arranged on the deck plate and are positioned on the deck plate; 3) the deck plate is fixed on a reversible deformation jig frame, and the reversible deformation angle is 0.3-0.45 degrees; and 4) the U-shaped ribs are wholly welded on the deck plate through a solid welding wire argon-riched shielded welding process. According to the welding method, the defects in the prior art can be overcome, and the welding method has the advantages that the safety and the reliability are good, the efficiency is high, the cost is low, etc.

The invention discloses a seamless acquisition method based on DDR2SDRAM array segmented storage, wherein a plurality of storage mapping monomers comprising a memory DDR2SDRAM, a three-dimensional waveform digital image processor and a three-dimensional data point lattice are adopted to alternatively carry out waveform data storage and mapping in a pipeline manner, such that acquisition of the acquisition system can not be stopped due to mapping and other operations so as to reduce a dead zone time and achieve seamless acquisition, wherein the DDR2SDRAM is divided into a plurality of storage units, and a storage depth is increased with a waveform obtained through triggering each storage unit without increase of the dead zone time. With the oscilloscope, segmented storage of the DDR2SDRAM array and alternate storage of the plurality of the DDR2SDRAM are adopted to achieve seamless acquisition at a slow speed base gear, and segmented storage of the DDR2SDRAM array is adopted to achieve seamless acquisition within a short time at a rapid speed base gear.

The invention discloses a circulating method for producing a natural gas by multi-stage methanation of semi-coke tail gas, and belongs to the field of preparation methods of natural gas. The preparation method comprises the following steps that: the purified semi-coke tail gas the hydrogen to carbon ratio of which is adjusted is used as a raw material, and the multi-stage methanation reaction is adopted to obtain a methane-rich gas; a front-end methanation part and a back-section methanation part are comprised, wherein the front-end methanation part is formed by connecting at least two methanation furnaces in series, and the back-section methanation part is formed by connecting more than one methanation furnace in series; and the obtained methane-rich gas is separated to obtain a product natural gas. The methanation process has strong controllability, the temperature of the methanation reaction can be controlled by adjusting the recycle gas, the raw material inlet temperature and the steam addition amount and other ways, and the temperature of the methanation reaction is controlled below 500 DEG C. The lower methanation operating temperature is not only favorable for performing the methanation reaction, reduces the requirements of the process on a material of a reactor and heat resistance of a catalyst, but also is favorable for prolonging the service life of the methanation reactor and the catalyst.

The invention provides a mounting method and device with acoustic emission sensor recycling capacity. The method comprises the following steps: a, an acoustic emission sensor is fixed in a cavity of a recovery device by a fixing claw; b, the recovery device is mounted in a drill hole, and the front end of a waveguide rod arranged in the recovery device extends deeply into a coal-rock mass body in front of the hole bottom; and c, after monitoring, the sensor is taken out from the rear end of the cavity of the recovery device, and sensor recovery is finished. The specially designed acoustic emission sensor recovery device is used for fixing the sensor in the wall of the drill hole of the mine coal-rock mass body, the mounting method and device are applied to inside of drill holes with any angles in the coal-rock mass bodies with different hardness, can effectively solve the problems that the sensor is difficult to mount and is not mounted in place in depth due to hole collapse and the problems about recycling and the like, and has the advantages that the reliability is high, the signal monitoring precision is increased, noise interference is isolated, mounting is convenient and fast, the sensor can be recycled and the like; and further, the operation difficulty and economic cost are reduced, the mounting efficiency is increased, a better application effect is obtained, and field popularization and application are facilitated.

The invention relates to a dialogue generation and corpus expansion method and device, computer equipment and a storage medium. The dialogue generation method comprises the steps of obtaining a current question text, wherein the current question text is obtained according to a current input question of a user; performing text vectorization processing on the current problem text, and then inputtingthe current problem text into a pre-created dialogue generation model, wherein the dialogue generation model is obtained by taking a question text vector and an answer text of the question text vector as model training samples for training, and the question text vector is obtained by performing text vectorization processing, synonym conversion and / or sentence pattern rewriting on an initial question text and conversion from a word vector to a semantic vector; and responding to the input question according to the target answer text, the input question and the response to the input question being the generated dialogues. By adopting the method, the number of samples can be increased, the sample availability is enhanced, and the dialogue quality can be improved.

The present invention is industrial method of reusing waste plastics to produce gasoline and diesel oil. Waste plastics including polyethylene, polypropylene and polystyrene in certain proportion are mixed and heated to liquefy and crack inside one reactor with double-screw stirrer inside it and molten salt inside sandwiched layer as heat conducting medium; the produced material is viscosity reducing cracked and the cracked gas is condensated into liquid fed to rectifying tower; molten plastic liquid is pumped from the reactor into one solid-liquid separator with separating molten salt liquid to separate residue and dirt; clean molten plastic is returned to the reactor while the separated residue and dirt is exhausted via screw extruder in the bottom of the separator; and decompression distillation is performed to produce oil. The present invention can produce oil with high quality in low cost and high conversion rate while tackling white pollution.

The invention belongs to the technical field of manufacturing of metal bipolar plates for fuel cells, and particularly relates to a fuel cell titanium alloy bipolar plate electromagnetic-thermal composite forming device and method based on multi-time-sequence pulse current. A power module of the device comprises a plurality of sets of pulse power sources, the pulse power sources discharge a titanium alloy blank and a Helmholtz coil according to the time sequence, preheat the titanium alloy blank, generate pulse current in the titanium alloy blank, generate a pulse magnetic field in the Helmholtz coil, generate pulse electromagnetic force under the combined action of the pulse current and the pulse magnetic field, and drive the titanium alloy blank to rush to a mold, and forming of a titanium alloy bipolar plate is achieved. Through multi-level time sequence pulse current discharging, the plasticity and forming performance of titanium alloy are greatly improved through the thermal effect of the titanium alloy at high temperature, the electro-plastic effect of the pulse current and the high strain rate effect of the pulse electromagnetic force, and high-quality forming of the titanium alloy bipolar plate is achieved.

The invention relates to a multimedia broadcasting system, it includes satellite DMB network and land DMB network. The satellite DMB network includes: satellite signal receiving antenna for receiving satellite signals; transmitter for receiving relative satellite signals from the antenna and conducting frequency conversion and amplification process and sending the processed signals adopting such frequency different from that of satellite signal; mobile terminal for receiving the signals from the transmitter. The invention adopts transmitter to replace current repeater, in which the number of apparatus and cost are reduced.

The invention discloses a tooth bar type plate inserting machine, which comprises a body (1); a movable support arm (2) is disposed on the body; a frame (3) is fixed on the support arm (2); a axially-movable inserting pipe (4) is disposed on the frame (3); a tooth bar (5) is disposed on the inserting pipe (4); a gear (6) engaged with the tooth bar (5) and a hydraulic motor (7) for driving the gear (6) are disposed on the frame (3); and the hydraulic motor (7) is connected with the hydraulic system disposed on the body. The invention has a simple structure and a light weight, can be used in soft foundation; achieves higher safety and lower fault rate, overcomes the broken chain phenomenon in the chain driving type equipment, and needs no repairing by climbing; greatly increases the inserting depth and benefit, and solves the problems of small depth and non-safety of the chain driving type equipment.

Disclosed is a channel depth measuring method based on a chaotic laser device and a correlative method thereof. The depth of a channel in a shoal water area can be measured on the basis of the chaotic laser device. The method includes on a channel water surface carrier, allowing the chaotic laser device to emit probing light and reference light, allowing the probing light to emit to the water bottom of the channel perpendicularly, collecting reflected probing light signals through a telescope, and converting the probing light signals into electrical signals; converting the reference light into electrical signals through a photoelectric detector, after storing two paths of electrical signals, performing correlation calculation, acquiring the time for light signals flying for a round trip in the channel water, and acquiring the channel depth accordingly. By the aid of the method, the conflict between the distance resolution and measuring depth according to the existing laser radar technology for measuring the channel depth is solved, the distance resolution unit can be centimeter, and the advantage of interference resistance is provided.

The invention discloses a device and a method for removing methanol from a methyl tert-butyl ether cracking product. The MTBE cracking product and absorption liquid undergo cross flow-counterflow contact in a multistage airflow shear cross-flow bed; under the shear action of high-speed rotating filler, cracked gas and the absorption liquid are dispersed, coalesced and redispersed for multiple times, so that multistage absorption is realized; cracking gas is introduced to a gas inlet in the side bottom of a multistage airflow shear cross flow bed; a gas outlet in the top of the multistage airflow shear cross flow bed is connected with a purified gas section; the absorption liquid is introduced to a liquid inlet in the side top of the multistage airflow shear cross flow bed; a liquid outletin the bottom of the multistage airflow shear cross flow bed is used for draining the absorption liquid; the liquid inlet is connected with a pump; the liquid outlet of the multistage airflow shear cross flow bed is connected with a liquid-rich tank; the multistage airflow shear cross flow bed comprises a liquid distributor, a liquid collecting and redistributing device, a rotor, a stator, a driving device and a casing. According to the equipment, the gas and the absorption liquid generally make counterflow contact, so that a gas-liquid mass transfer propulsion force is greater, the purification degree of the cracking gas is improved, and the concentration of methanol in the rich solution and the utilization rate of the absorption liquid are improved.

The invention discloses a geometric shadow map method for triangle reconstruction, and the method comprises the steps: (1) drawing a scene in a light source space, and generating and storing a geometric shadow map; (2) carrying out the compression of the obtained geometric shadow map based on a GPU, and obtaining a compressed geometric shadow map; (3) drawing a scene in a vision field, packaging pixels, carrying out triangle consistency check, and using a stored triangle to achieve the geometric reconstruction of the depth value of a pixel shading object; (4) comparing a pixel depth value in the light source space with the depth value of the shading object, obtaining a shadow calculation result, and completing the reconstruction of the geometric shadow map. Aiming at problems of deformation and depth deviation in a shadow map method, the method employs discrete scene raw triangular patches to represent and record the information of the shading object, and the invention provides the geometric shadow map method. While generating a high-quality shadow, the method has certain advantages over other algorithms in geometric data storage and expenditure and performance, and can meet the demands of real-time application better.

The invention discloses a composite electrolyte for a gel lead acid storage battery, and belongs to the technical field of storage battery production. The composite electrolyte adopts polyacrylamide and sodium carboxy methyl cellulose as a hybrid deflocculating agent, takes metal sulphate as an additive and optimizes battery performance by changing the content of each component. The early capacity loss of the battery can be reduced; the problem of low capacity of the gel battery can be solved; the battery has high charging acceptance performance and low moisture loss and hardly produces thermal runaway; the after-deep-discharge recovery performance of the battery is remarkably superior to that of an ordinary lead acid battery; the utilization rates of active substances of battery electrodes are increased; and the performance of the battery can be greatly improved. The gel lead acid battery solves the problems of low battery capacity, low after-deep-discharge recovery performance, high hydration demixing rate of colloidal electrolyte in charging and discharging processes, and the like.

The invention discloses a near-eye display system and a head-mounted display device. The near-eye display system comprises a light source, a display module, an ocular lens set, a lens array, a plurality of waveguide coupling devices and a plurality of near-eye display panel waveguides, wherein the light source comprises a plurality of sub-light sources, when an image to be projected is projected,light emitted by the current sub-light source is uniformly distributed on the display module; the display module is used for displaying an image to be projected, and the light beams corresponding to the image to be projected are emitted to the ocular lens set; the ocular lens set is used for emitting light corresponding to the image to be projected to a lens corresponding to the current sub-lightsource in the lens array; the lens is used for projecting the light beams corresponding to the image to be projected to the corresponding waveguide coupling device; the waveguide coupling devices areused for coupling the light beams corresponding to the image to be projected into the corresponding near-eye display panel waveguide; and the near-eye display panel waveguides are used for guiding thelight beams corresponding to the image to be projected into human eyes.

The invention relates to a fast insertion gun for an allergy test. The fast insertion gun for the allergy test comprises a handle (1), a sliding operation rod (2), a scaleplate (3), a gun body (4) and a plurality of fast insertion needles (5), wherein the scaleplate (3), the gun body (4) and the fast insertion needles (5) are connected with the sliding operation rod (2). The fast insertion gun for the allergy test is characterized in that a plurality of fast insertion needle fixing pillars (6) are fixedly arranged at the lower end of the gun body and the sliding operation rod (2), and the fast insertion needles (5) are installed on the fast insertion needle fixing pillars (6) in a sleeved mode; the handle (1) is made of stainless steel or plastics; the sliding operation rod (2) is installed on a lateral surface of the handle (1) and slides in a sliding groove way in the lateral surface of the handle. As the fast insertion gun is used, the fast insertion depth is limited, the fast insertion liquid amounts of all test points are the same, the scaleplate, corresponding to the fast insertion positions, carried by the fast insertion gun can be used for carrying out wheal size measurement after fast insertion is finished, and the fast insertion gun for the allergy test is easy and convenient to operate, high in efficiency and accurate and reliable in result.

The invention discloses a terahertz wave modulator based on an organic polymer film. The terahertz wave modulator comprises a dielectric substrate and the organic polymer film attached to the surface of the dielectric substrate. The dielectric substrate is made of silicon materials with a high resistance value, the thickness of the dielectric substrate ranges from 0.1 mm to 2 mm, the organic polymer film is formed in the mode that the dielectric substrate is coated with poly2-(2-ethyl oxethyl)-5-ethynylanisole in a spun mode, and the thickness of the organic polymer film ranges from 100 nm to 250 nm. The light-control terahertz wave modulator is easy to manufacture, low in manufacturing cost, high in modulation depth, stable and reliable.

The invention provides a test method for the residual stress of a subsurface of a grinding wafer, and belongs to the field of tests of the residual stress. The method includes steps: providing the grinding wafer; cleaning the wafer via high-pressure water; fixing the wafer; determining the corrosion position, and performing corrosion and cleaning; testing the corrosion depth and the residual stress by respectively employing a white light interferometer and a laser Raman spectroscopy; and repeating the above experiment steps to obtain the residual stress value of the subsurface of the grinding wafer. According to the method, the operation is simple, the residual stress for grinding the subsurface of the wafer can be accurately obtained, and an optimized scheme of the grinding process can be proposed via the analysis of test results.

The invention discloses an over-wet filler turning and drying device for a highway embankment and a using method thereof. The device comprises a propulsion vehicle, a power system and a turning and drying device, wherein the propulsion vehicle is in mechanical connection with the turning and drying device, so that the turning and drying device is driven to move, and the needed electric energy is provided for the turning and drying device; the power system is in mechanical connection with the turning and drying device, and the turnover power is provided for the turning and drying device; the turning and drying device is composed of an iron sheet box, a fan, an electric heating plate, a turning and mixing wheel and plow blades, wherein the interior of the iron sheet box is hollow and the bottom of the iron sheet box is open, the fan is fixed at the top of the iron sheet box, the electric heating plate is horizontally arranged in the iron sheet box and located below the fan, and the turning and mixing wheel and the plow blades are both fixed at the bottom of the iron sheet box; the plurality of plow blades are arranged and are located in the forward advancing direction of the propelling vehicle and in front of the turning and mixing wheel; and each plow blade is composed of a connecting rod, a first connecting nut, a first rotating shaft, a toe plate connecting steel sheet, a toeplate, a first baffle and a second baffle. The problem that an existing method for treating the over-wet filler of the embankment needs to introduce a hot air source from outside is solved.

The invention relates to the technical field of agriculture, in particular to a seedling cultivation rack convenient to adjust planting height. The seedling cultivation rack comprises a fixing frame,a nutrient solution tray, a planting tray and a liquid storage tank. The nutrient solution tray is mounted in the fixing frame, a lifting mechanism is mounted under the nutrient solution tray, the planting tray is mounted above the nutrient solution tray, and the liquid storage tank is fixedly connected to the top of the fixing frame. A low-speed motor is fixedly connected to the top of the fixingframe, a half bevel gear sleeves a shaft extending end of the low-speed motor, a second two-way screw rod is mounted in the fixing frame, and a left bevel gear and a right bevel gear sleeve the middle of the second two-way screw rod. Spraying sliders sleeve the second two-way screw rod, a spraying disc is fixedly connected to the lower surface of each spraying slider, and a stirring mechanism ismounted in the liquid storage tank. Crop seedlings are planted in planting grooves, different crop seedlings are different in underwater penetration of roots, and the underwater penetration of the seedling roots can be adjusted according to practical demands through the lifting mechanism.

The invention discloses a two-stage catalyst for catalytic degradation of chlorine-containing volatile organic chemicals (VOCs) as well as a preparation method and application of the two-stage catalyst. The two-stage catalyst is prepared from a catalyst A, a catalyst B and a barrier medium, wherein the catalyst A and the catalyst B are set in two stages, and the two stages of catalysts are isolated from each other by means of the barrier medium; the active components of the catalyst A are at least one of compounds of Ce, Cr, V, Fe and Ni, and a carrier of the catalyst A is an acidic oxide; theactive components of the catalyst B are least one of compounds of Cu, and a carrier of the catalyst B is CeO2; the barrier medium is at least one of SiO2, Al2O3, quartz sand, quartz wool and glass fibers. The two-stage catalyst can well solve the problems of deep oxidation and catalyst chlorine poisoning.

The invention discloses a signal generating system for aging tests. The signal generating system comprises a power source, a clock source, a counting unit, a conversion unit, a storage unit, a latch unit, a driving unit and an output interface. The clock source is used for outputting square-wave clock pulse signals; the counting unit is used for receiving the square-wave clock pulse signals and can be triggered by rising edges of square-wave clock signal pulses to output counting states, so that address data signals can be outputted by the counting unit; the storage unit is used for receiving and storing the address data signals; excitation vector files can be converted into excitation vector files in required formats by the conversion unit; required excitation signal waveforms can be outputted by the storage unit; second excitation signal waveforms which change along with the excitation signal waveforms can be outputted by the latch unit; the driving unit is used for receiving the second excitation signal waveforms and providing the second excitation signal waveforms to aging devices. The signal generating system has the advantage that the problem of incapability of meeting conditions of existing aging tests due to functional limitation of aging ovens can be solved.

The invention relates to a preparation method of micro nano composite textured structure black silicon and black silicon solar cells. The preparation method of micro nano composite textured structure black silicon includes the following steps: performing atomization and corrosion on a silicon chip to obtain a silicon chip with a textured structure; and performing atomization and corrosion on the obtained silicon chip with the textured structure, so that a hole or line structure with a nanoscale is formed through corrosion in the textured structure and the black silicon with a micro nano composite textured structure can be obtained. The preparation method of micro nano composite textured structure black silicon and black silicon solar cells has the advantages of greatly reducing the corrosion cost, reducing the surface recombination, improving the photoelectric conversion efficiency, and being simple and controllable in operation, and can solve the problems that in a full liquid phase corrosion method, consumption of heavy metal is high; cleaning is not easy; and the nanometer light tripping structure is too deep.

The invention proposes a laser radar echo processing method based on an optical MEMS (micro-electro-mechanical system), and the method comprises the steps that a laser radar emits a laser pulse, is reflected on an MEMS micro-galvanometer, is irradiated to the surface of a to-be-tested target, is received by a receiving lens, and is concentrated in a detecting element on a focal plane; S2, the detecting element outputs a photoelectric signal, extracts the current time Tn from the photoelectric signal, obtains the range finding data Dn, and then stores the range finding data Dn, the position number Pij of the detecting element and a current scanning angle data (theta)n for package and storage; S3, the steps S1 and S2 are repeatedly executed according to a preset sample capacity till the datasatisfying the preset sample capacity is obtained; S4, a range of a response angle of the detecting element is determined, and finally the detecting element is constrained to respond within a corresponding angle range. The method does not need an additional high-precision measurement device for assistance, and can achieve the detection, calculation and confirmation of a receiving angle of a lasersignal reflected by the to-be-tested target.

The invention discloses a three-dimensional mixed minimum perceivable distortion model based on depth image rendering. According to the three-dimensional mixed minimum perceivable distortion model, the minimum perceivable distortion value is modulated through a depth masking effect and a geometric distortion effect. The three-dimensional mixed minimum perceivable distortion model comprises the steps of calculating a 2D minimum perceivable distortion value, calculating depth masking degree and geometric distortion of an image, performing modeling on exponential relationship between the depth masking degree and geometric distortion and the mixed minimum perceivable distortion, and multiplying the 2D minimum perceivable distortion value by the exponential relationship to obtain a three-dimensional mixed minimum perceivable distortion value. By means of the new three-dimensional mixed minimum perceivable distortion model, the shortcomings that three-dimensional perception effects such as the depth masking effect and the geometric distortion effect are ignored by the existing three-dimensional minimum perceivable distortion model. In addition, the new three-dimensional mixed minimum perceivable distortion mode is applied to three-dimensional video coding to perform residual filter, and therefore, three-dimensional video coding efficiency is increased.

The invention belongs to the technical field of hydrometallurgy and resource recovery, and particularly relates to a fluorine removal method for a fluorine-containing material. The fluorine removal method comprises the following steps that 1), fluorine-containing solid powder containing one or two or more elements of cobalt, nickel and manganese is taken and leached with sulfuric acid to obtain fluorine-containing leachate; 2) a lime milk solution is added into the fluorine-containing leachate for carrying out neutralization reaction; 3) after the reaction is finished, filtering is carried outto obtain neutralized slag and a neutralized solution; (4) a fluorine removal agent is added into the neutralized solution for reaction; 5) after the reaction is finished, filtering is carried out toobtain a fluorine-removed solution and an acted fluorine-removed agent; and 6) regeneration treatment is carried out on the acted fluorine-removed agent by using a NaOH solution to obtain a regenerated fluorine removal agent. The method is simple and convenient in operation and high in fluorine removal efficiency, can reduce the fluorine content in the solution to be less than 10 mg / L, and is suitable for fluorine removal of a single cation solution system or a polycation solution system.

The invention provides a construction process for implanting a composite section hollow pile by pouring filling mortar into an expanded hole. The expanded hole penetrates through a hard rock-soil layer of strongly weathered and moderately weathered rocks, the hollow pile is implanted with the filling mortar, and an annular gap is filled with shock excitation dumping soil, so that the composite section hollow pile with a tubular pile inner ring and a filling outer ring is formed. The expanded hole is matched with the large-diameter hollow pile to form the large-diameter composite section hollow pile, the problems that the prefabricated pile is small in section, poor in stability, limited in set depth and end bearing condition, insufficient in bearing capacity and the like are solved, and the large-diameter composite section hollow pile can be applied to bridge pier and abutment pile foundations with unbalanced loads and complex properties and is quite wide in application prospect.