37results about How to "Increase test cost" patented technology

The invention discloses an evaluation method of reliability of an aerospace electronic product based on a failure mechanism. On the basis that an analysis method with a combination of physical simulation and a test is adopted, a physical simulation model of the electronic product is constructed, the means such as sensitivity analysis, Monte Carlo analysis, and stress analysis are adopted, and product key elements are identified and in combination with actual working conditions of the elements, a failure mechanism analysis is conducted. Currently, the failure mechanism analysis aiming at the elements is a means used for analyzing a failure reason after a failure occurs during the test or in the using process of the electronic product, thus pertinent improvement is conducted on the product, the service life of the product is prolonged, and the reliability of the product is improved; the failure mechanism analysis aims at finding key characteristic parameters which affect the service life and the reliability of weak elements as an independent variable of the reliability model.

The invention discloses a unified imaging method for a synthetic aperture radar (SAR) in four modes aiming at the strip SAR, bunching SAR, sliding bunching SAR and TOPS SAR. The problem that the prior art is limited by the modes of the SAR is mainly solved. The method comprises the implementation processes of (1) receiving echo data of the original SAR of a platform, and performing range Fourier transform on an echo signal; (2) performing fractional order Fourier transform twice on the echo signal, and performing direction scaling processing; (3) performing range migration correction on the echo signal, and compensating a phase curve into a straight line through a hyperbolic curve; and (4) performing the fractional order Fourier transform twice, realizing focusing imaging, and removing the residual phase. The SAR imaging in the four modes can be finished through simple parameter setting, different scene and resolution requirements can be met, and the imaging method is wide in application range and can be applied to the fields of ground mapping, target identification and the like.

The invention discloses a method for solving the modal damping of a shaft system of a 1,000MW large steam turbo generator set based on an excitation injection stimulated torsional oscillation test. The method comprises the following steps of: exciting a special modal torsional oscillation signal domega from the shaft system by applying a precise modal frequency pumping signal; performing frequency spectrum analysis on the domega and performing time domain analysis on amplitude to acquire precise modal frequency; analyzing variation trend data of the excited domega signal amplitude in a time domain; performing logarithm least square fitting on the variation trend data of the domega signal amplitude in the time domain to solve a total damping level D under the test condition; setting up a systemic nonlinear simulation model by taking PSCAD as a platform; setting mechanical damping as 0 and recognizing the damping of a corresponding work condition, namely electrical damping De; and calculating the mechanical damping of the corresponding work condition, namely Dm=D-De. The method can be used for recognizing the damping level condition of the 1,000MW steam turbo generator set under various work conditions, particularly the mechanical damping of the set.

The invention discloses a PCR detection and identification method capable of distinguishing pyricularia grise and magnaporthe oryzae and belongs to the technical field of plant fungus molecule biological detection. The PCR detection and identification method includes the steps of A, extracting DNA, to be specific, respectively extracting DNA of pyricularia grise and magnaporthe oryzae; B, designing primers, to be specific, designing a pair of specific primers Mol3-F / Mol3-F by inserting two ends of the retrotransposon of 849bp into a coding region of avirulence gene PWL3 of pyricularia grise; C, performing PCR, to be specific, performing PCR amplification by taking the extracted total DNA of pyricularia grise and magnaporthe oryzae as a template, so as to obtain an amplification product; D,determiningresults, to be specific, subjecting the amplification product to electrophoresis detection, if a target band of 1771bp is detected, then determining the product as pyricularia grise; if aband of 922bp is detected, then determining the product as magnaporthe oryzae. The PCR detection and identification method can rapidly accurately distinguish pyricularia grise and magnaporthe oryzae which are difficult to distinguish, and has a great significance in field spreading, breeding and evolving of Pyricularia on natural conditions.

The invention discloses a simulation testing machine for evaluating cooling uniformity of an internal combustion engine. The simulation testing machine comprises: an internal combustion engine body, a water pump, a high-temperature oil pump, a first motor, a second motor, a flowmeter of cooling water, a cooling fan, a radiator, a first throttle valve, a second throttle valve, a sensor of outlet temperature of cooling water, a sensor of outlet pressure of cooling water, a boiler of heat transfer oil, a high-temperature flowmeter, a simulated piston, a measuring plate, and the like. According to the invention, the boiler of heat transfer oil is used to heat silicone oil as well as make the heated silicone oil circulated and pass a cylinder of the internal combustion engine so as to simulate the actual heating of the internal combustion engine; besides, cyclic cooling liquid is used for cooling the simulation testing machine. According to the testing apparatus, the measuring plate is arranged between a cylinder cover of an engine and the body, so that relevant sensors van be arranged to measure internal parameters of a cooling water jacket of the internal combustion engine. Compared with an actual internal combustion engine, the simulation testing machine has advantages of simple structure and short test period; in addition, a function of high-efficient measurement of cooling uniformity of the internal combustion engine can be realized with low cost.

The invention discloses a generalized polar coordinate imaging method for a synthetic aperture radar (SAR), and relates to the field of radar signal processing. The method comprises the following steps: 1, receiving an echo signal of a target through the SAR, and acquiring a distance wavenumber domain signal from the echo signal; 2, performing orientation dechirp on the distance wavenumber domain signal by using an orientation dechirp function; 3, acquiring a phase-compensated signal; 4, performing Fourier inversion on the phase-compensated signal in a distance direction, and performing scaling, phase correction and phase protection operation to obtain a final imaging result. By adopting the generalized polar coordinate imaging method, the vehicle load test cost can be lowered, and different scene requirements are met.

The invention discloses a streptococcus agalactiae loop-mediated isothermal amplification kit and application thereof. The kit comprises an LAMP primer, a 2*reaction buffer solution, Bst DNA polymerase, a fluorescent visual detection reagent, ultrapure water and a streptococcus agalactiae DNA template, wherein the LAMP primer comprises outer primerS F3 and B3 and inner primers FIP and BIP. Specificity detection and sensitivity detection prove that the LAMP detection kit disclosed by the invention can be used for monitoring reaction in real time, quantitatively detecting the copy number of the streptococcus agalactiae, rapidly and accurately obtaining detection results and providing convenience for simply and rapidly detecting the streptococcus agalactiae.

The invention provides a micro solid-phase extraction method of a membrane-protected coordination polymer of polybrominated diphenyl ethers in multiple mediums. The micro solid-phase extraction method is used for constructing a metal organic coordination polymer material with nano ducts and a multi-dimensional structure through metal ion nodes and organic ligand chains and is protected by a membrane to manufacture a micro solid-phase extraction device, wherein the micro solid-phase extraction device is used for extraction and preenrichment of trace amount of polybrominated diphenyl ethers (PBDEs) in a multi-medium environment sample and carrying out quantitative analysis by combining analysis measures, such as a GC (Gas Chromatograph). According to the micro solid-phase extraction method,the target products can be selectively enriched by constructing coordination polymers with different apertures by controlling synthesis conditions; meanwhile, the environment-friendly purpose is achieved because an organic solvent is used or less organic solvent is used; a manufactured micro solid-phase extraction bag can be repeated by more than 20 times, so that cost is low, extraction speed ishigh and no purification is needed; and the micro solid-phase extraction method is used for extracting the PBDEs in soil and can achieve higher sensitivity, better repeatability and lower detection limit by combining analysis measures, such as the GC.

The invention discloses a method for performing a thermal compression test by using a thermal simulation test machine, mainly solving the technical problem that the deformation rate cannot be accurately controlled when the hot compression experiment is performed by using the general unit of the Gleeble 3500 thermal simulation test machine in the prior art. A method for performing a thermal compression test by using a thermal simulation test machine provided by the invention comprises the following steps: 1) configuring equipment conditions of the Gleeble 3500 thermal simulation test machine; 2) measuring an acceleration time t; 3) calculating a minimum acceleration distance s of the compression hammer head, and setting a time t1 required by the compression hammer head pressing the distances at the pressing speed and a compression deformation time t2 of a sample; 4) mounting the sample on the thermal simulation test machine; 5) performing the compression deformation test in sequence; and 6) analyzing the data collected during the test. The method provided by the invention realizes accurate simulation of thermal compression deformation process parameters by using the general unit ofthe thermal simulation test machine.

The invention discloses a plant seed germination box. The plant seed germination box provided by the invention comprises a box body (1) and a cover body (2) matching with the box body, wherein the box body has a bottom wall and box body sidewalls, and the cover body has a top wall and cover body sidewalls. The plant seed germination box is characterized in that the upper part of a cavity of the plant seed germination box is provided with a germination tabula, and gaps allowing germination paper to pass are arranged between the germination tabula and the box body sidewalls. Compared with conventional plant seed germination boxes, the invention has the following advantages: the germination tabula is additionally arranged at the upper part of the box and does not directly contact with water, the germination paper is allowed to be in a wet state all the time because of water absorbing capacity of the germination paper, and the wet germination paper can evenly provide moisture needed in germination of seeds. As long as sufficient water is added into the box in advance, manual addition of moisture everyday is avoided in the germination process, so workload is reduced, and influence on germination test by uneven addition amount of moisture during manual addition is avoided.

The invention discloses LAMP primers for real-time and quantitative detection of porcine circovirus type 3, a kit and application. The primers are as shown in SEQ ID NO:1-6. The kit comprises the LAMPprimers, a 2*reaction buffer solution, Bst DNA polymerase, ultra-pure water and a porcine circovirus type 3 DNA template. The application includes sample preparation, design and synthesis of the LAMPprimers, extraction of viral genome DNA templates, establishment of an LAMP reaction system, and specificity detection, sensibility detection and real-time and quantitative detection performed by adopting an LAMP detection method. The specificity detection and the sensibility detection prove that the LAMP detection method provided by the invention can monitor the reaction in real time and can quantitatively detect the copy number of the porcine circovirus type 3, and detection results can be quickly and accurately obtained, thereby bringing convenience for simply, conveniently and quickly detecting the porcine circovirus type 3.

The invention discloses a real-time quantitative LAMP (Loop-Mediated Isothermal Amplification) primer, a kit and a method for detecting arcanobacterium. The primer is shown as SEQ ID NO: 1-4; the kit comprises the LAMP primer, 2X reaction buffer, Bst DNA polymerase, ultra-pure water and arcanobacterium DNA. The method comprises the steps: preparation of materials, design and synthesis of the LAMP primer, extraction of a reaction template, establishment of an LAMP reaction system, and specific detection, sensitivity detection and real-time quantitative detection by adopting the LAMP detection method. The specific detection and sensitivity detection prove that the LAMP detection method provided by the invention is capable of monitoring the reaction in real time and performing quantitative detection on a copy number of the arcanobacterium, the detection result can be rapidly and accurately obtained, and convenience is brought to simple and rapid detection of the arcanobacterium.

The invention discloses a wiring structure for a low voltage signal double winding transformer partial discharge test. The middle of the first terminal and the second terminal of a partial discharge-free excitation transformer is grounded. The first terminal and the second terminal are connected with a compensation reactor combination respectively. One terminal of the phase winding of a first low voltage winding is connected with the first terminal of the partial discharge-free excitation transformer, and the other two terminals of the phase winding of the first low voltage winding are interconnected. The neutral point terminal of the first low voltage winding is connected with one terminal of the phase winding of a second low voltage winding. The two terminals of the phase winding of the second low voltage winding are interconnected. The neutral point terminal of the second low voltage winding is connected with the second terminal of the partial discharge-free excitation transformer. The bushing end screen terminal of the tested phase at the high voltage side of the tested low voltage side double winding transformer is grounded via a detection impeder, and the detection impeder is connected with the partial discharge detector.

The invention discloses a metal-fitting corona onset voltage determination method based on finite-element electric-field simulation. According to the method, a finite-element electric-field simulationcalculation model under an actual working condition of a metal fitting is established, and electric-field distribution thereof under rated voltage U<0> is calculated; and a corona discharging calculation physical-model is established, and a field strength value of a normal direction of highest field strength is imported into a corona onset voltage calculation program through software to obtain corona onset voltage of the metal fitting. According to the method, corona onset voltage of complex-structure metal-fittings under actual running environments can be estimated, and an important reference basis can be provided for super / ultra-high-voltage metal-fitting design.

The invention discloses a real-time quantitative LAMP (Loop-Mediated Isothermal Amplification) primer, a kit and a method for detecting erysipelothrix rhuriopathiae. The primer is as shown in SEQ ID NO: 1 to SEQ ID NO: 4. The kit comprises the LAMP primer, a 2x reaction buffer solution, Bst DNA polymerase, superpure water and a erysipelothrix rhuriopathiae DNA. The method comprises the following steps: preparation of materials, design and synthesis of the LAMP primer, extraction of a reaction template, construction of a LAMP reaction system and specificity detection, sensitivity detection and real-time quantitative detection which are carried through a LAMP detection method. The specificity detection and the sensitivity detection show that the LAMP detection method provided by the invention can monitor reaction in real time and quantitatively detect the copy number of the erysipelothrix rhuriopathiae, thus quickly and accurately obtaining a detection result and bringing convenience to simple and quick detection of the erysipelothrix rhuriopathiae.

The invention discloses a car door installation tool for simulating a side collision test of a car, and the tool comprises an upper frame, an upper hinge seat, a cross swinging block, a lower hinge seat, and a lower frame. The upper and lower ends of the upper frame are provided with installation plates, and a guide rod is disposed between the installation plates. One end of the guide rod is provided with a welding block and a boss, and the other end of the guide rod is provided with a thread. The thread is provided with a nut, and the guide rod passes through the cross swinging block. The cross swinging block is connected with the upper hinge seat, and the guide rod can slide up and down in the cross swinging block. The cross swinging block can rotate around the upper hinge seat. The welding block is provided with a through hole, and the interior of the through hole is provided with a shaft. The shaft is installed on an installation block. The shaft is connected with the lower frame,and the lower frame rotates around the shaft. The lower end of the lower frame is hinged to the lower hinge seat. According to the invention, the testing trolley improves the simulation effect of theside collision test of the car, can accurately simulate the impact condition of different parts of a dummy during the side collision, and reduces the test cost.

The invention relates to a wind tunnel testing device and in particular to a high-speed wind tunnel rotation missile free rotation speed testing system which is a testing system consisting of a missile model, a magnetic piece, a balance scale, a Hall element and a signal processing system, wherein the missile model is supported in a wind tunnel through the balance scale; the missile model can be rotated freely around the axis of the balance scale; the magnetic piece is fixed at the tail part of the missile model and can be rotated together with the missile model at a same rotation speed; the Hall sensor is fixed at the tail part of the balance scale and is capable of generating a pulse signal when the magnetic piece is rotated; the signal processing system is connected with the Hall sensorthrough a data wire; and the pulse signal generated from the Hall sensor can be converted into a rotation speed of the magnetic piece, and furthermore, the rotation speed of the missile model can becalculated. The wind tunnel testing device has the characteristics of being simple in structure, relatively high in precision and low in cost, particularly a fluid field is slightly interfered by theoverall structure, then errors can be correspondingly reduced, and the properties are significant for accurate testing on rotation speeds of high-speed wind tunnel missiles.

The invention relates to a porous medium equivalent simplified model building method for tight reservoir numerical simulation, which comprises the following steps: building a compact porous medium sandstone particle accumulation three-dimensional simplified geometrical morphology model based on the idea of reducing the pore space of a reservoir under the synergistic effect of compaction and cementation of rock mineral particles; firstly, an equal-diameter spherical sandstone particle tangent infinitesimal body is established; a sandstone particle size distribution rule is represented through a Rayleigh distribution function, a form of combining large ball accumulation with particle size obeying Rayleigh distribution with small ball filling is established, and the particle size is longitudinally and randomly arranged in a staggered manner to form a three-dimensional sphere accumulation model; a synergistic coefficient is introduced to characterize the influence of the compaction effect of the dense porous medium and the cementation effect of the cement on the pore form; and fitting the cooperation coefficient in combination with a lattice Boltzmann simulation method to realize construction of a three-dimensional simplified geometric morphology model of the tight reservoir pore structure. According to the invention, the differential characterization and alternate distribution of geological causes and pore throats of tight reservoirs can be embodied, and the porosity and the seepage capacity are realized.

The invention discloses a test and calculation method for measuring an equivalent plastic strain forming limit diagram. The test and calculation method comprises the following steps: measuring the hole expansion rate or uniform elongation rate of a material; calculating real fracture strain or real uniform strain with edge damage; calculating real main strain and real secondary strain under different simple strain paths; and drawing an equivalent plastic strain forming limit curve. According to the method, various defects in the prior art are overcome, a feasible engineering solution is provided for edge cracking prediction of advanced high-strength steel, the material testing cost is reduced, and the labor cost and the equipment investment are saved. The measured equivalent plastic strain forming limit curve can be directly input into existing forming simulation business software, the accuracy of a prediction result can be visually verified, engineering application is accelerated, and therefore the method has important theoretical and engineering practical significance.

The invention discloses a trolley for simulating a side collision test of a car. The trolley comprises a chassis, wherein a rear end frame is welded at the rear end of the chassis, car wheel modules are installed at four vertex corners of the chassis, a linear bearing module is installed at the front end of the chassis, four groups of collision rods are installed on the linear bearing module, thefront ends of the four groups of collision rods are provided with a first buffer device, a car door installation tool are installed on the three upper groups of collision rods, a seat installation pedestal is installed on the bottommost collision rod, a car roof frame is installed above the rear end frame and the linear bearing module, the linear bearing module is provided with a gas curtain installation bracket, a side buffer is installed at the front end of the linear bearing module, and the front end of the side buffer is provided with a second buffer device. The trolley improves the simulation effect of the side collision test of the car, can accurately simulate the impact conditions of different parts of a dummy during the side collision, and reduces the test cost.

The invention discloses a method for detecting the shear bonding strength of refractory mud, comprising the following steps: preparation of refractory bricks; preparation of refractory mud; positioning of test specimens; masonry test specimens; drying; measuring the area of ​​the bonding surface; Shear load pressure test; calculation of shear bond strength. The invention uses a special fixture for positioning and molding, which can precisely control the thickness of the mud joint and the parallelism of the upper and lower end faces, so that the lower end faces of the left and right refractory bricks are on the same plane, ensuring the standardization of the bonding test pieces, and the sample preparation is simple; refractory Bricks do not need to be cut or simply processed, the bonding method is consistent with the on-site construction, the thickness of the refractory mud layer is precisely controlled, and the detection results are highly accurate and have guiding significance.

The invention discloses a method for solving the modal damping of a shaft system of a 1,000MW large steam turbo generator set based on an excitation injection stimulated torsional oscillation test. The method comprises the following steps of: exciting a special modal torsional oscillation signal domega from the shaft system by applying a precise modal frequency pumping signal; performing frequency spectrum analysis on the domega and performing time domain analysis on amplitude to acquire precise modal frequency; analyzing variation trend data of the excited domega signal amplitude in a time domain; performing logarithm least square fitting on the variation trend data of the domega signal amplitude in the time domain to solve a total damping level D under the test condition; setting up a systemic nonlinear simulation model by taking PSCAD as a platform; setting mechanical damping as 0 and recognizing the damping of a corresponding work condition, namely electrical damping De; and calculating the mechanical damping of the corresponding work condition, namely Dm=D-De. The method can be used for recognizing the damping level condition of the 1,000MW steam turbo generator set under various work conditions, particularly the mechanical damping of the set.

The present invention relates to a porous medium equivalent simplified model construction method for numerical simulation of tight reservoirs. It is based on the idea of ​​reducing the pore space of reservoirs through the synergistic effect of rock mineral particle compaction and cementation, and establishes a three-dimensional accumulation of dense porous medium sandstone particles. Simplify the geometric shape model; firstly, establish the tangent micro-elements of the sandstone particles with equal diameters; use the Rayleigh distribution function to characterize the sandstone particle size distribution, and establish the shape of large sphere accumulation combined with small sphere filling with the particle size obeying the Rayleigh distribution. The diameter and longitudinal random staggered arrangement constitutes a three-dimensional sphere packing model; the synergy coefficient is introduced to characterize the compaction of dense porous media and the influence of cement cementation on the pore shape; combined with the lattice Boltzmann simulation method to fit the synergy coefficient, the compactness Construction of 3D simplified geometric model of reservoir pore structure. The invention can reflect the differential characterization and alternate distribution of the geological origin of tight reservoirs and pore throats, and realize the porosity and seepage capacity.

The invention discloses a test method for measuring a limit tip cold bending angle and equivalent fracture strain, which comprises the following steps: preparing a bending sample, setting an initial fixed loading stroke, determining existence and absence of a crack state, determining an effective sample, and measuring the limit cold bending angle. The method for measuring the equivalent fracture strain comprises the following steps: spraying speckles on the side surface of a sample, obtaining an effective sample for DIC data processing, calculating the deformation of the edge side of the effective sample, measuring the arc length and calculating the equivalent fracture strain. According to the invention, a technical scheme of combining fixed stroke loading, a DIC technology and theoretical calculation is adopted, and the limit cold bending angle and the equivalent fracture strain are accurately measured. According to the method, the failure moment of the material is accurately controlled, the intrinsic parameters of the material are measured, the test cost is reduced, and the method has important engineering practical significance and wide engineering application prospects.

The invention relates to the technical field of biological control, in particular to a method for screening biocontrol bacteria of Candidatus Liberibacter spp. by a two-step method. According to the method disclosed by the invention, five indicator pathogenic bacteria are used for performing confrontation culture, potential biocontrol bacteria are screened, a half leaf method is adopted, the content of Candidatus Liberibacter spp. pathogenic bacteria of half leaves which are not treated is detected through real-time fluorescent quantitation PCR, after the other half leaves are treated with thepotential biocontrol bacterium liquid, the content of the Candidatus Liberibacter spp. pathogenic bacteria of the other half leaves treated with the potential biocontrol bacterium liquid is detectedthrough the real-time fluorescent quantitation PCR, the efficacy of the potential biocontrol bacteria is obtained through a calculating formula, and the potential biocontrol bacteria high in control effects are screened to be used as target Candidatus Liberibacter spp. biocontrol bacteria. The method disclosed by the invention can be used for various hosts of the Candidatus Liberibacter spp., hasthe characteristics of being high in efficiency, quick and the like, and has important significance in biological control of the Candidatus Liberibacter spp..

The invention discloses a radiometer for performance in-situ test of a thermal control coat, which consists of a heat testing cavity, a test piece plate, heat detectors, a test piece plate strut, a heat testing cavity strut, a heat insulation cavity and a data acquisition base, wherein the heat insulation cavity is a test part of the radiometer and is supported by the heat testing cavity strut and placed inside the heat insulation cavity; the surface of the test piece plate is coated with the thermal control coat to be tested, and the test piece plate is supported by the test piece plate strut and placed inside the heat testing cavity; the heat detectors are film heat detectors and placed below the test piece plate and at the bottom of the heat testing cavity respectively; the heat insulation cavity is used for blocking thermal disturbance of spatial irradiation inside the heat insulation cavity; and a signal acquisition board card is placed in the data acquisition base. After the thermal control coat receives the irradiation of a simulated spatial environment, the change of temperature is detected by the heat detector, the change of thermal flux of the coat is obtained according to the change of the temperature, and the change of coat performance is calculated by using the change of the thermal flux. The radiometer has the advantages of simple structure, small time constant and high test precision, and can well realize the performance in-situ test of the thermal control coat in the simulated spatial environment.

The invention discloses a pillar impact tool and a test trolley for simulating a side impact test of a car, comprising a side door frame, a rocker hinge seat, a door frame fixed hinge seat, a cylindrical seat and a pillar impact installation base, and the cylindrical seat is installed on On the post strike installation base, there are side door frames on both sides of the post strike installation base. The side door frame is hinged with the door frame fixed hinge seat. The door frame fixed hinge seat is installed on the post strike installation base. Rod, the slide bar passes through the cross rocker, and the cross rocker is hinged on the hinged seat of the rocker. A pillar impact tooling and a test trolley for simulating a side impact test of a car according to the present invention can simulate the deformation of the car door under the working condition of an automobile side pole impact to the greatest extent, and cooperate with the test platform to standardize the test data of the real vehicle side pole impact , which greatly reduces the cost of the real vehicle test, and the structure is ingenious, the installation is convenient, and the test efficiency is improved.

The invention discloses a unified imaging method for a synthetic aperture radar (SAR) in four modes aiming at the strip SAR, bunching SAR, sliding bunching SAR and TOPS SAR. The problem that the prior art is limited by the modes of the SAR is mainly solved. The method comprises the implementation processes of (1) receiving echo data of the original SAR of a platform, and performing range Fourier transform on an echo signal; (2) performing fractional order Fourier transform twice on the echo signal, and performing direction scaling processing; (3) performing range migration correction on the echo signal, and compensating a phase curve into a straight line through a hyperbolic curve; and (4) performing the fractional order Fourier transform twice, realizing focusing imaging, and removing the residual phase. The SAR imaging in the four modes can be finished through simple parameter setting, different scene and resolution requirements can be met, and the imaging method is wide in application range and can be applied to the fields of ground mapping, target identification and the like.