225results about How to "True restoration" patented technology

The invention relates to a vehicle-mounted road spectrum testing system based on surface structured light, comprising a camera, a projector, a vehicle body, data acquisition and processing equipment, an inertial navigation system, a GPS antenna and a clock triggering synchronization board. The system is characterized in that a plurality of three-dimensional point clouds capable of covering the whole road surface can be obtained by repeating the shooting process by a mobile projector and camera system, then coordinate conversion is carried out on the obtained three-dimensional point clouds in combination with the data acquired by the inertial navigation system, the data are converted to a uniform coordinate system, as the adjacent images overlap, denser and more reliable point cloud data can be obtained by correspondingly interpolating and filtering the redundant information; and the complete three-dimensional elevation data of the road surface to be tested can be obtained after splicing the point clouds obtained by scanning a plurality of images. The system provides a perfect scheme for road surface testing and can reduce the acquisition frequency while restoring the road surface elevation more veritably and lower hardware cost.

The invention provides a testing device for competitive adsorption of supercritical CO2 and CH4 in shale and a testing method of the device. The device comprises an injection pump system, a long core holder, a back-pressure valve, a differential pressure gauge, a temperature control system, a liquid fraction collector, a gas meter and a gas chromatograph instrument. The testing method comprises an evaluation method of CH4 single component gas in a shale core and an evaluation method of CH4 gas, converted by the supercritical CO2, in the shale core. According to the device and method, the detection conditions of a laboratory test that the supercritical CO2 displaces CH4 adsorbed in the shale under the high temperature and high pressure conditions of a stratum are met through a multifunctional long core displacement method, and then the purpose of evaluating the efficiency that the supercritical CO2 displaces the adsorbed CH4 is achieved; by using the combined long core, the gas injection volume is large, the errors are decreased, and the formation condition is truly restored; the cracked long core can simulate the competitive adsorption process of the fractured supercritical CO2 and the CH4 under the true shale reservoir condition; the injected CO2 is in the supercritical state, and an experiment is performed in a step-by-step depressurizing mode, and the depletion exploitation process of a stratum can be truly simulated.

The present invention discloses a computed tomography metal artifact correction method. The method comprises: inputting a to-be-corrected image; acquiring first projection data of the to-be-corrected image; performing first correction on the to-be-corrected image and acquiring second projection data according to a result of the first correction; performing a weighting process on the first and second projection data to acquire third projection data; and obtaining a corrected image according to the third projection data. The present invention further discloses a metal artifact correction apparatus. According to the method and the apparatus provided by the present invention, artifacts can be further reduced and the quality of images can be improved on the premise of reserving available information of original images.

The invention discloses a video recording method and device as well as a video playing method and device, and belongs to the technical field of video recording. The video recording method comprises the following steps: recording, by the video recording device, a preset recording region on a first screen; in a process of recording of the first screen, if a host unit sends an operation instruction to a first equipment end and / or a second equipment end through a second screen, recording the operation instruction and a time stamp when the operation instruction is sent; and integrating the operation instruction and a record content together in real time according to the time stamp so as to generate an integrated video, or generating a first video when the video recording is completed, and integrating the operation instruction with the first video according to the time stamp so as to generate the integrated video, wherein the first screen and the second screen are two display screens set by the host unit; and the first equipment end is a server, and the second equipment end is a client. According to the video recording method and device, when the video integrated by the video recording device is played, interaction and management scenes during video recording can be really reduced.

The invention discloses a three-dimensional reconstruction method for a soil microstructure. The three-dimensional reconstruction method comprises the following steps: I, acquiring a soil sample: acquiring the soil sample on which three-dimensional reconstruction is required to be performed, wherein the soil sample is a cylindrical soil sample; II, hierarchically scanning the soil sample: hierarchically scanning the soil sample from top to bottom by using a scanning electron microscope, wherein the soil sample is divided into a plurality of scanning surfaces from top to bottom, the scanning electron microscope is adopted during scanning of each scanning surface, and each scanning surface is divided into a plurality of regions for scanning, then a plurality of electron microscope scanning images acquired by scanning are spliced to acquire an entire electron microscope scanning image of the scanning surface; III, sorting the electron microscope scanning images; IV, positioning the images; V, performing three-dimensional reconstruction: calling a three-dimensional reconstruction module to process a plurality of entire electron microscope scanning images to acquire a three-dimensional space model of the soil. The method has the advantages of simple steps, rational design, convenience in implementation and good use effect, and the established soil three-dimensional space model can truly reduce the internal structure of the soil.

The invention discloses a rock disturbance generating mechanism, which comprises a first vertical plate and a third vertical plate. A second guide rod is fixed between the first vertical plate and the third vertical plate, and the second guide rod passes through a driving frame; a driving screw rod passes through the driving frame, the first vertical plate and the third vertical plate and is in screwing assembling with the driving frame through thread; the driving screw rod passes through one end of the third vertical plate and is connected with the output shaft of a loading motor; an impact plate can slide on the first guide rod; the back of the impact plate is provided with an impact disc, one end surface is connected and fixed with one end of an impact guide rod; the impact guide rod is sleeved with an impact spring, and the other end of the impact guide rod is provided with an impact guide end; an automatic loading mechanism is arranged on the driving frame; the bottom part of the loading motor is provided with a motor supporting plate; one end of an impact shaft is provided with a peripheral mounting head, the other end passes through the first vertical plate, and the end, passing through the first vertical plate, is provided with an auxiliary impact disc; and the impact shaft is connected with the loading shaft through a connection shaft assembly. The invention also discloses a relaxation-disturbance integrated experiment device applying the above rock disturbance generating mechanism.

The invention discloses a device and method capable of simulating oil displacement efficiencies of oil layers with different dip angles in order to explore oil displacement efficiencies generated when different displacing agents are applied to heterogeneity stratums with dip angles. The device is composed of a constant-speed displacement pump, pressure gages, three intermediate containers, a variable-dip-angle core holder, an image analyzer, a measuring cylinder, pipelines and valves, wherein the pipelines and the valves are used for connecting all the parts. The three intermediate containers contain stratum water, crude oil and a displacing agent correspondingly. A tracer agent is added into the displacing agent. By adoption of the device, the dip angle of a core can be changed by changing the dip angle of the core holder, so that the influence of the different dip angles on the oil displacement efficiency is studied, and a relation formula of the liquid production capacity and the dip angle is regressed. By use of the device and method, the flowing law of stratum crude oil in the water flooding or gas flooding process of the stratum with the dip angle can be simulated, so that an appropriate displacing agent is selected preferably and conveniently.

The invention discloses a 3D panorama parking assistance system and belongs to technologies applied to the field of automobile safety aided driving. The 3D panorama parking assistance system comprises a camera input module, an image correcting module, a three-dimensional projection module, an image splicing module and an image display module. The system shows the conditions around an automobile to a driver truly through a three-dimensional image, so that safety in the automobile parking process is improved. According to the system, a plurality of machine vision and digital image processing algorithms are integrated and combined with multiple advanced technologies of the machine vision field, so that the automobile parking process is higher in safety.

The invention relates to a three-dimensional visual detection method and detection device for road surface damage information. The detection method comprises the following steps that optical grating fringes are projected onto a road surface to be detected; projected optical grating fringe images are photographed correspondingly, and image information is transmitted to a processor; the image information is processed, and three-dimensional road surface image data are formed; three-dimensional reconstruction of the road surface is completed according to the three-dimensional road surface geometric data; color rendering is conducted on the three-dimensional road surface images, and road surface damage types of the road surface images subjected to color rendering are recognized through a connected domain labeling method; road surface damage characteristics of the road surface information are worked out; and finally the worked-out road surface damage characteristics serve as detection results and are output. The detection method is accurate in detection, high in efficiency and capable of detecting various kinds of road surface damage information. The invention further relates to the three-dimensional visual detection device for the road surface damage information. The detection device comprises an optical grating projector, two CCD cameras, an optical-electricity encoder and a detection control computer.

The invention discloses a machine room inspection method based on the image processing technology. The method comprises: step one, shooting a holographic image of a machine room scene by using a holographic camera; step two, on the basis of a cylindrical projection method, acquiring an all-round image of the machine room and collecting spatial coordinate information of the machine room and all devices in the machine room; step three, on the basis of the all-round image and the spatial coordinate information, carrying out image preprocessing and unified coordinate transformation on the holographic image and then carrying out image registration and image fusion to obtain a panoramic image of the machine room; step four, collecting pictures of all devices in the machine room based on an inspection line, processing the pictures based on an image recognition technology to obtain detection data and working status data of all devices; step five, storing the panoramic image of the machine roomand the collected data into a database and displaying the panoramic image of the machine room and the data corresponding to all devices at a WEB side; and step six, analyzing the data based on a customized rule, entering a warning mode under the condition of having data not conforming to the rule, and displaying warning information. With the disclosed method, convenient, visual, timely, and accurate effects are realized.

The invention discloses a three-dimensional model testing apparatus capable of simulating water outburst and mud outburst geological disasters. The apparatus comprises a lower supporting rack, an axial pressure loading device, a peripheral pressure loading device, and a model sample part; the peripheral pressure loading device is arranged on the top of the lower supporting rack and is capable of loading a peripheral pressure onto the model sample by filling high-pressure gas or water into the peripheral chamber through a pressure adjusting valve; the model sample part is arranged in the peripheral pressure loading device, an annular water tank is arranged in a movable pressing plate under the model sample part, a water pressure is loaded on the model sample through a water penetrating plate by filling water into the annular water tank; and the axial pressure loading device is arranged in the lower supporting rack, is connected to the sample model part by going through the bottom of the peripheral pressure loading device, and applies an axial pressure on the model sample through an oil cylinder arranged on the lower end of the axial pressure loading device. The provided apparatus has the advantages of simple whole machine structure, good stability, and convenience for carrying out tests, and can precisely simulate the initial environment of a sample and carry out excavate unloading tests. Through a pre-fabricated model sample, the test period is largely shortened, and the test efficiency is improved.

The invention provides a pull-type high-speed train crash test bench, and belongs to the field of railway vehicle crash test. The pull-type high-speed train crash test bench comprises a rigid wall anda crash vehicle body, wherein the rigid wall is arranged at the front end of a rail. Four vertical columns are arranged on two sides of the rail, front beams and rear beams are arranged at the top ends of the vertical columns on the two sides of the rail, I-shaped steel guide rails are erected in the middles of the front beams and the rear beams, a front limiter and a rear limiter are arranged attwo ends of the guide rail, a tensioning wheel is arranged on the middle upper portion of the guide rail, the front beams are provided with driven wheels, the rear beams are provided with pulling mechanisms, an output shaft of a pulling motor is connected with a speed changer, the speed changer is connected with driving wheels, one end of a pulling steel rope is fixed to the front end of a pulling trolley, the other end of the pulling steel rope bypasses the driving wheels, the tensioning wheel and the driven wheels and is fixed to the rear end of the pulling trolley, electromagnets are arranged at the bottom of the pulling trolley, a high-speed photographic system measuring head is arranged at the top of the rigid wall, a speed sensor is positioned on the right of the rail, four speed measuring heads are parallel to the rail, the rigid wall is provided with a force sensor, and electromagnet holders are arranged at the top of the crash vehicle body.

A three-dimensional dynamic load loading large-sized similar material simulation platform includes a flexible force transmission rubber, a box body and a simulation platform; a displacement sensor is arranged between a guide rail and a top cover plate, and a front cover plate, side covers, a rear cover, the top cover plate, hydraulic cylinders, the guide rail, the displacement sensor and a pressure sensor form a cover plate loading device; and the flexible force transmission rubber is arranged at the inner side of the front cover plate, the side cover plates, the rear cover plate and the top cover plate. The three-dimensional dynamic load loading large-sized similar material simulation platform is provided with the flexible force transmission rubber, the flexible force transmission rubber has the characteristics of flexibility, changeability, and incompressible size, a water injection tube is arranged on the side surface of the box body, and is used for introducing a filling material to the goaf and flooding water to a simulated rock stratum after the coal seam is exploited, and high pressure gas is added to a simulated coal seam to stimulate gas in order to meet different experiment requirements.

The invention provides a high-pressure gas ejection collision device, and belongs to the technical field of rail vehicle collision tests. The high-pressure gas ejection collision device comprises an air compressor, a collision vehicle body and a rigid wall at the front end of a rail, and is characterized in that an air cylinder is fixed with the ground foundation, an output pipeline of the air compressor is connected with a gas one-way valve and a gas dryer in series and is connected with the tail end of a back cavity a of the air cylinder through an inlet pipe joint, the air cylinder is provided with the back cavity a, a middle cavity b and an ejection cavity c, the cavities are internally provided with a duplex piston and a piston connecting rod, the bottom of the back cavity a is provided with an emergency release valve, a gas flow control valve is arranged between the back cavity a and the middle cavity b, the upper part of the ejection cavity c is provided with a release valve, and the lower part is provided with a water flow control valve; and the ejection cavity c is internally provided with a high-strength cloth bag, two ends of the cloth bag form closed spaces respectivelywith a high-pressure ejection piston and a right-end plate, and the right end of the ejection cavity c is provided with three uniformly distributed buffer springs. The high-pressure gas ejection collision device is mainly applied to rail vehicle collision tests.

The invention provides a digital culture multi-dimensional presentation system and method. The system comprises a panoramic view retrieval and display module, a 3D model display module, a panoramic and 3D model display module, a panoramic video module and a background management module. According to the invention, the multi-dimensional presentation system is realized; the system comprises the multi-dimensional functions of 3D model loading display, panoramic display, panoramic video playback and the like; the system is provided with a panoramic image retrieval function; a user uploads a known scene picture and searches for a corresponding panoramic image, and then panoramic display is carried out; the user is helped to rapidly position the image resource needed by the user in a large number of panoramic resources, which is convenient; panoramic and 3D models are integrated; the user can view panoramic roaming and visually see the display information of a 3D model in a panorama at the same time; the reality scene is realistically restored; and the visual experience of the user is enhanced.

The invention discloses a simulation test device and a simulation test method for mechanical behavior characteristics of a cross-fault tunnel roadway under different burial depths and different tectonic stresses. The simulation test device comprises a support frame, a loading hopper, a guide rail, a sliding block, a bidirectional power system and a confining pressure loading system. A confining pressure loading system for simulating overlying formation pressure and horizontal tectonic stress is provided for surrounding rock materials in a fixed hopper and a movable hopper. Meanwhile, a bidirectional power system, a guide rail and a sliding block are matched, so that the movable hopper can move in the horizontal direction and the longitudinal direction, complex engineering environment simulation of different burial depths, different tectonic stresses and fault composite diastrophism is achieved, and simulation of tunnel and roadway mechanical behavior characteristics in the environmentis achieved. According to the invention, the engineering actual situation can be restored more truly, the research accuracy of the mechanical behavior characteristics of the cross-fault tunnel roadwayunder the deep high ground stress condition is improved, and the problem that the existing physical model box cannot simulate the influence of the overlying stratum pressure and the tectonic stress on the tunnel roadway is solved.

The invention discloses an AIS (Automatic Identification System) trajectory big data-based ship traffic environment reconstruction method. The method includes the following steps that: step 1-1, a time interval parameter is segmented so as to be divided into various time segments, the trajectory data of all ships in a specified geographical range within a time segment are only requested each time;step 1-2, a web front end temporarily stores the trajectory data in the step 1-1, preprocesses the trajectory data, and calculates and reconstructs the spatial relationship of the trajectory data; step 1-3, the web front end periodically requests new trajectory data from a server and performs dynamic update; and the step 1-1, 1-2, and 1-3 are repeated, so that the continuous reconstruction of a traffic environment can be realized at the web front-end. With the method adopted, an AIS data-based visualization technological means is provided for shipborne equipment and the equipment of a maritime supervision department, and inland navigation can be smoother, more orderly, safer and more efficient, and obvious economic and social benefits can be brought about.

The invention relates to a scanning method of a capacitive touch screen and the capacitive touch screen. The scanning method of the capacitive touch screen comprises the steps as follows: performing global scanning to acquire at least one touch point; setting the route range of all the acquired touch points as a central area, and only scanning routes expanding for preset values from two adjacent ends of the central area to serve as point reporting routes. With the adoption of the scanning method, the number of times of global scanning can be reduced, so that the power consumption of the capacitive touch screen in the scanning process can be effectively reduced, meanwhile, the point reporting rate of touch points is effectively increased, and touch tracks can be reduced more actually. The touch effect of the capacitive touch screen can be improved while the touch experience of a user can be enhanced.

The invention discloses an interest point recommendation method and system fusing credibility and metric factor matrix decomposition. According to the recommendation method and system, construction ofa user social relation matrix from different perspectives is the key of research, user information in a social network and interaction information between users are utilized to construct a user social trust network, and the user social trust network and a metric factor matrix decomposition model are fused for comprehensive recommendation. According to the recommendation method and system, information related to the user is mined from different perspectives through data breadth and depth, user attributes and behaviors are restored more truly, and the user preference model is established, so that recommendation of the user interest points is more accurate and more personalized, and a better recommendation effect is achieved.

The invention discloses a virtual object image synthesis method and device, electronic equipment and a storage medium, and relates to the field of artificial intelligence, in particular to a computervision and deep learning technology. The implementation scheme is as follows: extracting a first face key point of the face of a virtual object and a second face key point of each frame of original mouth-shaped face image; processing the virtual first face key point to generate a first 3D face position and posture information corresponding to the face of the virtual object; processing each secondface key point of each frame of original mouth-shaped face image to generate second 3D face shape vertex information corresponding to each frame of original mouth-shaped face image; generating a target mouth shape face image corresponding to each frame of original mouth shape face image; and synthesizing a virtual object speaking image segment corresponding to the voice segment according to the virtual object image and each frame of target mouth-shaped face image. Therefore, the original mouth-shaped face image is adjusted to be merged under the posture and the position of the virtual object image, and the naturalness of the merged image is improved.

The invention relates to an image defogging method. The method comprises the following steps: (1)reading the image, (2)calculating and obtaining estimated value of an atmospheric light value of the image as a first estimated value of the atmospheric light value through a standard dark channel hypothetical algorithm, (3)circularly calculating and obtaining the optimum estimated value of the atmospheric light value of the image, calculating and obtaining the estimated value of the atmospheric light value of the image as a second estimated value of the atmospheric light value through a standard dark channel hypothetical algorithm in each cycle, outputting the second estimated value of the atmospheric light value obtained in the current cycle as the optimum estimated value of the atmospheric light value if difference of the first estimated value of the atmospheric light value and the second estimated value of the atmospheric light value obtained in the first cycle is not greater than the threshold value given in advance, or the difference of the second estimated value of the atmospheric light value obtained in the former cycle and the second estimated value of the atmospheric light value obtained in the current cycle is not greater than the threshold value given in advance, and implementing the next cycle if the difference is greater than the threshold value given in advance, (4)calculating the defogging image based on the optimum estimated value of atmospheric light value. The invention also relates to a corresponding image defogging device.

The invention discloses a remote assisting method, which comprises the steps that an assisted end initiates an assisting request to an assisting end, and communication connection is established between the assisted end and the assisting end after the assisting end agrees, wherein the assisting request comprises a problem needing to be assisted; for the problem needing to be assisted, the assistedend collects data and sends the data to the assisting end; the assisting end carries out object recognition based on the received collected data, according to the result of the object recognition, model matching is carried out in a model library, a matched model is used for carrying out three-dimensional modeling, the established three-dimensional model is associated with an object and a scene toconstruct a virtual assisting scene, and the virtual assisting scene is presented to a user of the assisting end; and the assisting end sends the assisting information to the assisted end. According to the method in the invention, the efficiency of solving problems can be improved.

The invention provides a microfluidic alveolar chip based on chemical modification. A human lung structure and a cell growth microenvironment can be simulated through a three-layer four-channel three-dimensional cell culture system formed on a chip, thereby more realistically restoring the cell growth environment in vivo. Therefore, cell metabolic gas can be detected more accurately. At the same time, the chemical modification of the chip can realize collection and detection of metabolic gas in vitro, a theoretical basis is provided for respiratory detection of lung diseases, and a new idea isprovided for treatment for diseases such as lung cancer.

The present invention provides a barcode image identifying and reading device. The device comprises an illumination apparatus and an integrated circuit, wherein the illumination apparatus irradiates a target region when the integrated circuit acquires reflected light; the illumination apparatus comprises a backlight lamp shade, a first light source and a second light source; the backlight lamp shade is a cover body defined by a backlight plate; a large opening and a small opening are separately formed in two ends of the cover body; the integrated circuit is arranged at the small opening of the backlight lamp shade; the backlight plate and a light axis of the integrated circuit form a certain angle; the backlight lamp shade changes a light path of the illumination apparatus and guides the light to enter a visual field range of the integrated circuit; the backlight lamp shade comprises a front surface and a back surface; an accommodating space is formed between the front surface and the back surface; the first light source is arranged in the accommodating space; the second light source is fixed on the edge, close to the large opening, of the backlight lamp shade; and the second light source is a Lambert luminous model. The backlight lamp shade is adopted to form a surface light source, so that the illumination intensity uniformity of the entire luminous surface reaches more than 90%.

The invention relates to a testing device for the drop rate of a cigarette combustion cone and belongs to the field of tobacco machinery. The device comprises a base, at least one smoking device, a clamping device, an igniting device, a simulated cigarette ash flicking device, an imaging detection device and a PLC (Programmable Logic Controller), wherein the at least one smoking device is arranged on one side of the base; the clamping device is arranged beside the smoking device; the simulated cigarette ash flicking device is arranged at the top of the smoking device; the PLC is connected with the at least one smoking device, the clamping device, the igniting device, the simulated cigarette ash flicking device and the imaging detection device. According to the testing device, automatic cigarette taking, igniting, smoking and detection of the drop rate of the cigarette combustion cone can be realized, further the detection precision of the drop rate of the cigarette combustion cone is improved, and labor intensity of detectors is reduced.

The invention discloses an experiment evaluation method of compact sandstone gas reservoir damage by simulating the gas production process. On the basis of the gas production process of a compact sandstone gas reservoir, the condition for production of reservoir gas is more really reduced. The reduction rate of productivity indexes before and after action of a working solution is taken as an evaluation index, the defect that the influence of damage to gas well productivity cannot be well evaluated through conventional indoor damage evaluation is overcome, and a bridge between indoor evaluationof compact sandstone gas reservoir damage and evaluation of a mine field is established. By means of the method, the obtained dynamic damage degrees by the working solution can be evaluated at the reduction rate of productivity indexes before and after action of the working solution at different gas production stages. With stress sensitivity, microparticle migration and other factors of the compact sandstone gas reservoir considered, the optimal flowback pressure different of the gas reservoir damaged by the working solution can be optimized. A new thought for evaluation of damage to the compact sandstone gas reservoir by the working solution is provided, and a new reference is provided for evaluation of damage to the compact sandstone gas reservoir by the working solution and optimization of protection reservoir working solution systems.

The invention discloses a rock relaxation test mechanism, which includes a loading oil cylinder, a loading shell, a loading shaft, a cover plate assembly, and a lifting assembly. A loading cavity is formed in the loading shell. The loading shaft passes through the loading shell and enters the loading cavity. A rock sample is mounted in the loading cavity. A clamping screw is arranged on an opening end surface of the loading shell and is mounted in a clamping hole in the cover plate assembly so as to mounting the cover plate assembly with the loading shell. The invention also discloses a relaxation-disturbance comprehensive test apparatus using the rock relaxation test mechanism. The test apparatus can be used for carrying out the relaxation-disturbance comprehensive test, can restore the actual forced status of the sample underground relatively actually, and can supply effective reference for design and construction in later period.

The invention discloses a real-time simulation method and system for a comprehensive energy system. The method comprises the steps: building a coupling simulation model which comprises a simulation model of a heat supply network and a natural gas network, and a power grid model; for coupling equipment related to multi-energy flow conversion, using energy coupled between simulation models of a heatsupply network and a natural gas network and a power grid model as interaction information between the two parts; and obtaining real-time meteorological data, obtaining building energy consumption data through multi-energy-flow load calculation, and transmitting the data to the coupling simulation model to perform real-time simulation of the comprehensive energy system. According to the invention, data communication between the simulation platform and the meteorological station is realized based on OPC, a function of establishing a comprehensive energy real-time virtual energy plant based onmeteorological data of a certain place is realized, and a reference is provided for researching development and utilization of local comprehensive energy.

The invention discloses a fractional order channelized separation method for reaching two linear frequency modulation (LFM) signals at the same time, which belongs to the technical field of radar signal reconnaissance. The parameters which reach the two signals at the same time are analyzed by utilizing the energy focusing characteristic of fractional fourier transform on non-stable signals, the different combinations of the two signals are judged, the interference of one signal to the other signal which is separated is greatly reduced through quasi focusing fractional order channelized extraction, limit order fractional order channelized extraction, secondary fractional order fourier domain filtering and other different separation methods, so that difficulty is reduced for follow-up signal processing; and fast Fourier transform algorithm can be adopted for realizing the reduction of the difficulty, so that the computing complicacy is low, and an effective tool is provided for the effective interception of the broadband LFM signals in radar reconnaissance.