277 results about "Surface deformation" patented technology

The invention belongs to the technical field of film quality analysis and evaluation, and particularly relates to a flexible circuit board film pressing quality detection and analysis method and system. The method comprises the steps of generating a self-adaptive scanning path based on a design file and surface deformation data; performing multi-modal data acquisition and fusion along a path through optical surface scanning, ultrasonic tomography and an optical coherence tomography imaging assembly; potential defects are positioned, and size, shape, position and defect type probability values are quantized; judging the authenticity of the defect by adopting a three-stage mechanism of cross-modal probability comparison, physical characteristic logic verification and multi-frame time sequence verification; and performing weighted scoring on the real defect matching acceptance standard table, and performing disqualification marking or outputting a process optimization suggestion to the pressing equipment according to a scoring result. According to the invention, the imaging limitation of the transparent coating layer is broken through, the internal interface layering and the precise detection of the microbubbles are realized, and the closed-loop control from detection to production adjustment is formed.

The invention discloses a guideboard surface deformation detection method and system based on a dynamic video sequence. The method comprises the following steps: acquiring road video data with a timestamp and position information; a traffic sign is automatically identified from the road video data, and geometric anomaly detection is carried out; a time sequence tracking sequence is established for the guideboard, and whether continuous abnormity exists in the guideboard is determined through multi-frame analysis; if yes, performing local texture consistency and local contour geometric analysis on the guideboard to obtain a fusion analysis result; performing state evaluation on supporting equipment corresponding to the guideboard to obtain a state evaluation result of the guideboard supporting equipment; and determining the final surface deformation state and the corresponding grade of the guideboard based on the fusion analysis result and the state evaluation result of the guideboard supporting equipment. By implementing the method provided by the invention, automatic detection and quantitative analysis of the bending or deformation condition of the road sign can be realized without manual intervention, and early warning information can be output in time.

The invention relates to the technical field of railway engineering, and provides a cantilever hoop attitude detection method and system based on visual inspection, and the method comprises the steps: calculating the dynamic shrinkage rate and stress distribution gradient of a metal material at a preset low temperature, and generating a deformation compensation coefficient; acquiring surface geometric deformation data of the cantilever hoop at a preset low temperature and non-uniform distribution data of a surface temperature field; and obtaining corrected deformation data, obtaining aligned data based on the corrected deformation data and the non-uniform distribution data, and performing low-temperature deformation field reconstruction on the aligned data to obtain a low-temperature deformation field reconstruction result so as to extract an overlapping region of a surface deformation path and a temperature abnormal boundary of the cantilever hoop. According to the surface deformation path and the geometric center offset of the overlapping region, calculating a posture offset parameter of the cantilever hoop, and generating a low-temperature deformation early warning signal; according to the method, the problem of insufficient detection precision caused by data collaboration loss is solved, and high precision, high robustness and scene adaptability of high-iron cantilever hoop low-temperature deformation detection are realized.

The invention discloses a modeling method for inverting surface high-precision three-dimensional deformation through InSAR and GNSS data fusion, and belongs to the technical field of surface deformation monitoring. The method includes the steps of resolving InSAR line-of-sight deformation, unifying InSAR and GNSS data reference systems, establishing a stress model based on an elastic theory, calculating a three-dimensional deformation component for the first time based on a least square theory, obtaining an optimal weight matrix by applying a variance component estimation method, calculating final three-dimensional deformation and the like. According to the method, three-dimensional deformation and strain parameters are estimated by fusing InSAR measurement data and GNSS measurement data based on the elastic theory, the stress relation between adjacent points is considered, and unnecessary spatial interpolation of GNSS measurement values is avoided. The variance component estimation method solves the problem of unreasonable weight ratio of different types of observation values, and according to the adjusted optimal weight matrix, a function model is solved based on the least square method, and high-precision and high-spatial-resolution earth surface three-dimensional deformation information within the research range is obtained.

The invention relates to an MT-InSAR self-adaptive fusion measurement method and device for long-term surface deformation of a coal mining subsidence area, and the method comprises the steps: obtaining surface deformation monitoring data in a plurality of modes, and carrying out the at least one of time-space alignment, noise removal and error correction of the surface deformation monitoring data, so as to obtain surface deformation data; calculating coherence indexes of the earth surface deformation data; generating a space adjustment coefficient by using a double-peak Gaussian function model constructed based on a coal mining subsidence area deformation rule; constructing an adaptive weighting method based on the coherence index and the spatial adjustment coefficient of the earth surface deformation data to calculate the weight of the multi-source InSAR data; and performing weighted fusion on the surface deformation monitoring data by using the weight of the multi-source InSAR data to obtain a final surface deformation result. Therefore, the problems of insufficient monitoring precision, incomplete coverage, poor adaptability and the like due to the fact that a single InSAR technology is difficult to comprehensively reflect spatio-temporal evolution characteristics of long-term surface deformation of the wide-area coal mining subsidence area are solved.

The invention relates to the technical field of deformation prediction, in particular to a lateral deformation prediction system and method based on a deep foundation pit wall body, and the system comprises a deformation data collection module which collects a ground surface settlement monitoring value and a lateral displacement monitoring value of a corresponding measuring point of the deep foundation pit wall body, carries out the time sequence alignment processing of data points, removes an abnormal monitoring value, and obtains a deformation data collection module; and establishing calibration deformation sequence data. According to the invention, through real-time acquisition and strict execution of data time sequence alignment processing, the consistency of ground surface settlement data and wall lateral displacement data is ensured, abnormal monitoring data is effectively eliminated, and the data accuracy and consistency are improved; in the spatial interpolation process, width measurement of a settlement area is introduced, the width characteristic of a settlement groove is determined, and the earth surface deformation trend is captured according to a deformation index; and extracting the maximum lateral displacement of each time section of the monitoring section, establishing a dynamic corresponding relation between the maximum displacement and the width of the settling tank, and identifying the regular influence of the change of the construction process on the lateral deformation.

The invention relates to the technical field of surface deformation detection, and discloses a semiconductor heating plate surface deformation detection device and method. Under the driving of the mobile driving mechanism, the bearing platform drives the to-be-detected semiconductor heating disc to move below the detection groove, in the moving process of the bearing platform, the shielding mechanism can shield the mobile driving mechanism, and under the common shielding effect of the fixed frame, the mounting platform and the shielding baffle, the to-be-detected semiconductor heating disc can be detected. The movable driving mechanism can be isolated from the external environment, external dust and other impurities can be effectively prevented from entering the moving space of the movable driving mechanism, and the accuracy of the movable driving mechanism for driving the bearing platform to move can be effectively guaranteed; each probe detection mechanism and the microscopic detection mechanism traverse the to-be-detected plane of the semiconductor heating disc and jointly carry out deformation detection on the to-be-detected plane of the semiconductor heating disc, so that the accuracy degree of deformation detection is ensured.

The invention belongs to the field of material mechanical property testing and strain measurement, and particularly relates to a local strain measurement method and system based on a four-point bending and digital image correlation (DIC) technology, and the method specifically comprises the following steps: cutting to prepare a sample, carrying out surface electrolytic polishing, preparing speckles on the surface of the sample to be tested, and carrying out a four-point bending experiment; speckle images of the lower surface of the sample are collected, displacement correction is conducted in combination with bending deflection calculation, the bending load and the strain of the upper surface of the sample are obtained in real time, the stress-strain relation and local strain distribution of the lower surface of the sample are obtained through calculation, and finally deformation and failure mechanism analysis is conducted in combination with surface deformation and crack morphology. The method provided by the invention combines four-point bending and DIC plane strain measurement technologies, can realize stretching, compression and dynamic fatigue loading on the surface of the sample, is suitable for performance test and failure analysis of tension, compression and fatigue deformation of brittle metal materials such as intermetallic compounds and amorphous materials, and has the characteristics of convenience, rapidness and low cost.

The invention relates to the technical field of die design, in particular to a method for acquiring a die surface deformation compensation value of a stamping die. The method comprises the specific steps that S1, a press table top deformation measuring system is adopted, and the deformation amount of a press under a certain load is collected; s2, establishing a simulation model of a measurement system by adopting Hypermesh software, and obtaining a simplified substitution model of a press table board and a sliding block by combining the collected experimental data through size optimization; s3, cleaning and grid division are conducted on the geometric structure of the mold, and accessory structures which do not affect the strength are removed; s4, combining the simplified model with the die grid model, adding load and constraint of a press machine, and performing stamping simulation; and S5, generating a die surface deformation contour map according to a simulation result, and obtaining a die surface deformation compensation value. Compared with the prior art, by combining a high-precision measurement technology and numerical simulation analysis, technical support can be provided for design and manufacturing of the stamping die, and progress and development of the die industry are promoted.

The invention relates to the technical field of defect detection, and provides a super-precision spring defect detection method and system, and the method comprises the steps: obtaining the surface deformation information of a to-be-detected super-precision diaphragm spring; extracting current defect feature data from the surface deformation information; storing the current defect feature data to a defect feature cache region; comparing the current defect feature data with historical defect feature data stored in a defect feature cache region to judge whether the current defect feature data has space-time constancy or not, and obtaining a space-time constancy judgment result; according to the time-space constancy judgment result, defect type marks corresponding to the current defects are judged as system artifacts or real product defects; and generating a detection report, and displaying the defect type mark based on a preset display rule for distinguishing and displaying the system artifacts and the real product defects. The method has the advantages that system artifacts and real product defects are distinguished, the detection accuracy and efficiency are improved, and unnecessary production interruption and verification cost are reduced.

The invention discloses a thin-wall surface deformation measurement method and device based on a Kriging model, and a medium. The method comprises the following steps: S1, generating an initial measurement point; s2, a Kriging model is constructed; s3, dynamically selecting a sampling mode; s4, acquiring a sampling point to be detected; s5, the deformation degree of the thin-wall surface is obtained through actual measurement; and S6, evaluating and iterating. Through prediction and selection of iterative sampling points and in combination with a dynamic adjustment sampling strategy, the number of measurement points is effectively reduced, and the method can overcome the problem of measurement errors caused by coordinate deviation in AACMM handheld measurement. Even if deviation exists between the position of an actual measurement point and the position of a theoretical sampling point, the method still can accurately capture the deformation degree of the thin-wall surface through prediction and iterative optimization of the Kriging model, the reliability of a measurement result is ensured, and the measurement precision, the measurement efficiency, the stability of the method implementation and the applicability and robustness of different workpiece applications are improved.

The invention relates to the technical field of five-axis numerical control machining error detection, in particular to a high-precision geometric error detection method and system for five-axis numerical control machining, and the method comprises the steps: obtaining a height error value and a height error matrix of a measurement point on the surface of a workbench through a laser interferometer; determining the final possibility that the height error matrix deforms in a corresponding area on the surface of the workbench; determining the deformation quantity of the surface of the workbench measured each time; determining the most recently measured deformation quantity change rate of the surface of the workbench; determining the final deformation quantity of the position of the workpiece on the surface of the workbench at each moment; and compensating the five-axis numerical control machine tool according to the final deformation quantity. The dynamic influence that the surface deformation of the workbench is gradually increased along with time accumulation and the influence of the self weight of the workpiece on the surface of the workbench are reduced, and the overall machining performance of the five-axis numerical control machine tool is improved.

The invention relates to an electrically-assisted biaxial stretching forming limit testing system and method for a plated plate, and belongs to the technical field of bipolar plate testing.The testing method comprises the following steps that a bipolar plate sample is heated through pulse current and then stretched; and meanwhile, temperature, displacement, load and surface deformation images of the bipolar plate sample during stretching are collected, ultrasonic detection is carried out, and a basic forming limit curve is established based on a plastic instability criterion and is dynamically corrected. Dynamic evolution of necking initiation, expansion and interface failure in the stretching process can be synchronously tracked, actual working condition requirements can be better met, interface thermal mismatch aggravated by Joule heat is avoided, and the influence of insufficient sensitivity of a general ultrasonic algorithm can be made up through multi-physics field detection. The failure criterion is redefined as the critical state of plating-substrate interface separation, and the error of the critical failure point predicted by the forming limit curve is further reduced.

The invention discloses a deformation estimation method and system for a surface elevation change area, and relates to the technical field of surface exploration. Based on different linear relationships between a DEM error and a vertical base line before and after height change and through minimizing a residual sum of squares, the deformation of the surface elevation change area is estimated; the real elevation change time, the DEM error before and after the elevation change and the deformation rate of each ground point can be accurately estimated at the same time, and the problem that time-varying signals are introduced by wrong DEM error correction and the signals may be wrongly explained as ground surface deformation is solved. And through the accurate and real elevation change time, the DEM error before and after the elevation change and the deformation rate, the magnitude represented by the surface elevation change quantity of the target area and the time represented by the deformation time sequence are estimated.

A system (100) and method for monitoring deformation of a roadway while drilling. The system (100) for monitoring deformation of a roadway while drilling comprises a plurality of feature points (11, 12, 13), at least one group of deformation monitoring binocular cameras (2), and a computer (3). The plurality of feature points (11, 12, 13) are dispersedly arranged on the surface of the roadway; the deformation monitoring binocular cameras (2) photograph the feature points (11, 12, 13) from different angles; acquired images (201, 202) comprise light of the feature points (11, 12, 13); the deformation monitoring binocular cameras (2) are in signal connection with the computer (3), so as to transmit the acquired images (201, 202) to the computer (3); and the computer (3) calculates three-dimensional spatial coordinates of the feature points (11, 12, 13) in a camera coordinate system in real time on the basis of the parallax of the feature points (11, 12, 13) in the images (201, 202) at different angles acquired by the deformation monitoring binocular cameras (2), and then calculates the deformation of the surface of the roadway in real time. According to the system (100) and method for monitoring deformation of a roadway while drilling, the feature points (11, 12, 13) are provided on the surface of the roadway, the deformation monitoring binocular cameras (2) photograph the feature points (11, 12, 13) from different positions, and a binocular vision measurement principle is used to achieve real-time monitoring of the deformation of the surface of the roadway, thereby achieving real-time continuous monitoring.

The invention provides a coal mine subsidence area earth surface deformation monitoring device, and relates to the technical field of monitoring devices.The coal mine subsidence area earth surface deformation monitoring device comprises a fixing bottom plate, a supporting structure is arranged on the fixing bottom plate, an adjusting structure is arranged on the fixing bottom plate in a sliding fit mode, a fixing structure is arranged on the adjusting structure, and a locking structure is arranged between the adjusting structure and the fixing bottom plate; a detection structure is arranged in the supporting structure, a monitoring structure is arranged on the supporting structure, the detection structure corresponds to the adjusting structure, a pushing structure is arranged between the supporting structure and the detection structure, a stabilizing structure is arranged in the detection structure, and the stabilizing structure corresponds to the pushing structure. According to the device, the adjusting structure is slidably installed on the fixing bottom plate, the fixing structure is installed on the adjusting structure, the fixing position of the fixing structure can be adjusted through the adjusting structure, and therefore the device can be well fixed to the ground according to needs, the stability of the device is guaranteed, and the position of the adjusting structure can be locked through the locking structure.

The invention discloses an InSAR (Interferometric Synthetic Aperture Radar) and graph neural network combined earth surface deformation space-time prediction method, which is suitable for space-time prediction of earth surface deformation. Based on DS-InSAR, obtaining radar sight line-to-time sequence earth surface deformation of the high-coherence measuring points; calculating the geographic distance between the measuring points and the mutual information between the deformation sequences corresponding to the points; the method comprises the following steps: judging connectivity between high-coherence measuring points according to a geographic distance between the measuring points and mutual information to generate an adjacent matrix, and organizing an original InSAR deformation monitoring result into graph structure data; and inputting the graph structure data into the LSTM-GCN model to predict and obtain the surface deformation of all the high-coherence measuring points in the whole area. The method is high in prediction precision and wide in application range, and can be effectively applied to the fields of space-time prediction of deformation of earth surfaces and buildings (structures) caused by mine closure, underground resource development, natural disasters and the like.

The invention discloses a rapid identification method and a monitoring system for a fatigue damage stage of an asphalt mixture. The identification method comprises the following steps: acquiring an acoustic emission signal generated by a test piece in a fatigue loading process and DIC image data of surface deformation of the asphalt mixture test piece; drawing a curve chart of acoustic emission accumulated impact number and energy changing along with loading times; performing graying processing on the DIC image data, and preliminarily judging spatio-temporal information of the crack; fitting an acoustic emission parameter curve; based on the impact number in the window and the change of acoustic emission energy, the asphalt mixture fatigue damage stage is divided; and aligning the time of the acoustic emission signal with the time of the crack space-time information, and determining the fatigue instability precursor information of the asphalt mixture and the instability failure initial position of the corresponding test piece according to the acoustic emission parameter characteristics before the instability failure of the test piece. According to the method, the acoustic emission signal impact number, energy and DIC image data are combined, and the instability damage of the asphalt mixture is predicted according to the acoustic emission parameter characteristics before fatigue instability of the asphalt mixture.

The invention discloses a steel structure machining device and method, and relates to the technical field of steel structure manufacturing, the steel structure machining device comprises two guide rails, an upper shape restraining assembly and a lower shape restraining assembly, the upper shape restraining assembly and the lower shape restraining assembly are arranged at the tops of the two guide rails correspondingly, and through the synergistic effect of the upper shape restraining assembly and the lower shape restraining assembly, the steel structure is machined. The whole-process precise regulation and control of H-shaped steel welding from dynamic deformation suppression to quality stability guarantee are achieved, and the method is different from a traditional extensive scheme of depending on a single rigid pressing roller and fixed hydraulic bag passive shape suppression and multi-device dispersed operation, so that H-shaped steel welding shape suppression operation is more precise, more stable, more efficient and more flexible, and the production efficiency is improved. The upper shape restraining assembly achieves accurate recognition and active restraining of the deformation gradient of the upper surface of the wing plate by means of the partition hydraulic bag design and the multi-sensing fusion sensing capacity of the upper shape restraining assembly, and the lower shape restraining assembly achieves the conveying function through an innovative hydraulic flexible conveying roller structure and forms rigid supporting on the lower surface of the wing plate from the bottom at the same time.

The invention relates to the field of structure optimization of M50NiL high-temperature carburizing bearing steel for aero-engines, in particular to a treatment method for eliminating large-size carbides in a carburizing surface layer of rare earth M50NiL steel. The rare earth M50NiL steel comprises the following chemical components in percentage by mass: 0.11 to 0.15 percent by weight of C, 0.10 to 0.25 percent by weight of Si, 4.00 to 4.25 percent by weight of Cr, 4.00 to 4.50 percent by weight of Mo, 1.13 to 1.33 percent by weight of V, 3.20 to 3.60 percent by weight of Ni, 0.15 to 0.35 percent by weight of Mn, less than or equal to 0.02 percent by weight of the total amount of Ce and La, less than or equal to 0.01 percent by weight of P, less than or equal to 0.01 percent by weight of S and the balance of Fe. After carburizing treatment and performance heat treatment are conducted on the sample meeting the component requirements, the sample is treated for a short time only through the surface deformation technology, the number density of large-size carbides on the carburized surface layer can be effectively reduced, the size distribution uniformity of the carbides on the carburized surface layer is improved, and the wear resistance of the material is remarkably improved; and the performance requirements of the bearing for the current aero-engine are met.

The invention relates to the technical field of punching machines, in particular to a pressure control method and system for products produced by a high-precision steel frame punching machine and computer equipment. According to the method, the pressure of the punch product is preliminarily adjusted through the load error, the load change is responded in real time, the adjustment can be quickly made when the pressure is too large or too small, the deviation of the surface form can be found in time by obtaining the surface image and the height value in real time and calculating the real-time maximum and minimum curvature and the Gaussian curvature, and the accuracy of the surface form is improved. The pressure is dynamically adjusted according to the curvature difference, surface deformation caused by too large or too small pressure is avoided, the surface flatness and shape accuracy of the product are guaranteed, the quality of the final product can be remarkably improved by continuously monitoring and adjusting the pressure in the production process, and the production efficiency is improved. The pressure is adjusted according to the load error between the actual load and the target load, the feedback speed is increased, real-time adjustment in the production process is ensured, and the precision and efficiency of the whole production process are improved.

The invention discloses a material water absorption deformation three-dimensional dynamic monitoring system and method based on a hemispherical view field. According to the dynamic monitoring system and method, external changes of materials such as argillaceous rock-soil bodies in the water absorption process can be dynamically captured in real time, and the full view of surface deformation of the materials such as the argillaceous rock-soil bodies in the water absorption process is comprehensively revealed from the perspective of full-dimensional space. The dynamic monitoring system comprises a water swelling deformation device, a camera monitoring system and a data acquisition device. The material water absorption deformation three-dimensional dynamic monitoring method based on the hemispherical view field comprises the following steps: S1, mounting and setting a monitoring system; S2, debugging a camera; s3, distilled water is injected into the water absorber; s4, keeping the water level in the water storage cavity of the water absorber unchanged; performing timed image data acquisition on the sample through a camera; and S5, judging that the sample does not absorb water any more, and completing monitoring. By adopting the material water absorption deformation three-dimensional dynamic monitoring system and method based on the hemispherical view field, high-precision image information can be obtained, and the monitoring accuracy is improved.

The invention discloses a porcelain surface defect detection method based on image processing, and relates to the field of porcelain surface defect detection, and the method comprises the following steps: carrying out bubble state analysis on a porcelain surface bubble image to obtain a porcelain surface bubble abnormal value, carrying out crack state analysis on a porcelain surface crack image to obtain a porcelain surface crack abnormal value, performing porcelain surface deformation state analysis on the porcelain surface deformation image to obtain a porcelain surface deformation value, and evaluating the porcelain surface defect state according to the porcelain surface bubble abnormal value, the porcelain surface crack abnormal value and the porcelain surface deformation value to obtain a porcelain surface defect abnormal value; the porcelain surface defect abnormal value and the set gradient reference interval are compared and analyzed, porcelain surface defect states in different states are correspondingly displayed and alarmed, the appearance quality of porcelain products can be deeply judged, the accuracy of porcelain surface defect judgment can be ensured, and porcelain with different surface qualities can be distinguished in time.

A surface deformation monitoring method and systems based on time-series InSAR (TS-InSAR) are provided. The method includes acquiring Synthetic Aperture Radar (SAR) data; performing differential interferometry; performing a robust two-tier multi-temporal InSAR method for detection of Persistent Scatterer (PS) and Distributed Scatterer (DS) candidates to acquire time series data for surface deformation monitoring; performing a variational mode decomposition (VMD) method to decompose TS-InSAR data into a plurality of components; reconstructing time series data; performing a gated recurrent unit (GRU) method; extracting trend of surface deformation; and performing continuous large-scale deformation monitoring. The InSAR-based deformation monitoring method integrates VMD and GRU, offering significant improvements in robustness and accuracy over the existing methods.

The invention relates to a polishing agent for a low-alloy weld metal EBSD sample and a method and application thereof. The polishing agent is mainly composed of citric acid and a silicon dioxide suspension. Vibrating polishing is carried out on the basis of the polishing agent, a low-alloy steel welding seam sample cannot be subjected to spot corrosion, a surface deformation layer is removed, and the hit rate of the prepared low-alloy welding seam metal EBSD sample can reach 98% or above. The citric acid is commonly used as a food additive, is easy to obtain, and is economical, practical, green and environment-friendly.

The invention relates to the technical field of surface deformation detection equipment, in particular to a semiconductor heating plate deformation detection device and method, and the device comprises a platform and a detection unit. The platform is of a circular structure, two clamping grooves are formed in the platform in the radial direction of the platform, the straight line connected by the two clamping grooves passes through the circle center of the platform, the two clamping grooves are symmetrical about the circle center of the platform, the detection unit comprises a positioning unit which is arranged on the platform and is used for positioning the heating disc, a clamping block is arranged in each clamping groove, and the positioning unit is used for positioning the heating disc. The clamping blocks are in sliding fit with the clamping grooves in the extending direction of the clamping grooves, clamping rollers for clamping the heating disc are vertically and rotationally arranged on the upper portions of the clamping blocks, a first distance measuring instrument is horizontally arranged at the end, away from the circle center of the platform, of each clamping groove, and the detection ends of the first distance measuring instruments horizontally face the clamping blocks. A rotating unit is arranged on the upper portion of the platform. According to the invention, the detection precision is improved, and the detection efficiency is also improved.

The invention relates to an ultrasonic rolling parameter calculation method based on nano-grain structure prediction. The method comprises the following steps: (1) determining a target grain size; and (2) negative feedback adjustment of the ultrasonic rolling parameters: obtaining the current ultrasonic rolling parameters, predicting the theoretical minimum value of the surface grain size of the metal surface deformation layer under the current ultrasonic rolling parameters, negative feedback adjustment of the current ultrasonic rolling parameters according to the surface grain size, and outputting target ultrasonic rolling parameters. According to the method, the nanocrystalline structure of the metal surface deformation layer serves as a machining target, the corresponding ultrasonic rolling parameters are developed by establishing a quantitative calculation method between the target grain size and the ultrasonic rolling parameters and combining the determined relation between the metal mechanical performance and the nanocrystalline structure according to the specific metal mechanical performance requirement, and the blindness of an experiment is avoided.

The invention relates to the technical field of welding devices, in particular to a self-adaptive adjusting complex curved surface welding device which comprises a workbench, a welding mechanism installed above a welding area and a sensor module connected with the welding mechanism, a two-way moving sliding table is installed on the workbench, and a limiting seat is installed on the two-way moving sliding table; a plurality of abutting rods used for abutting against the curved surface of the workpiece and a plurality of air bag clamps self-adaptive to the curved-surface workpiece are installed in the clamping work area on the limiting base in an up-down corresponding mode. Workpiece curved surface deformation is detected through the sensor module, a three-dimensional path model is generated, the horizontal position of the welding gun is adjusted through the xy-axis moving platform, the angle of the welding gun is adjusted in cooperation with the first motor and the second motor, and meanwhile the height position of the welding gun is adjusted through the air cylinder; the welding requirement of the complex curved surface workpiece is met by adjusting the posture of the welding gun, and the welding effect of the welding device can be improved.

The invention discloses an earth surface deformation catastrophe risk level assessment method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a target influence factor of a target area; evaluating the target influence factor through a catastrophe evaluation model to obtain a target contribution rate; generating a catastrophe grade zoning map according to the target influence factor and the target contribution rate; and correcting the catastrophe level zoning map according to the deformation rate, and determining the catastrophe risk level of the target earth surface deformation according to the corrected catastrophe level zoning map. According to the method, the target influence factor is adopted to dynamically evaluate the surface deformation catastrophe risk grade through the catastrophe evaluation model, and the reliability and timeliness of the surface deformation catastrophe risk evaluation grade can be ensured.

A crossbeam for measuring deformation velocities of a surface of a material under a dynamic load includes a crossbeam body, a first type of velocimeter and a second type of velocimeter-mounted on the crossbeam body. The crossbeam body is mounted on a measurement carrier. The measurement carrier is configured to move along the surface of the material and apply a dynamic load to the surface. The first type of velocimeter is configured to measure the vertically resilient deformation velocity of the surface behind an action force of the dynamic load. The second type of velocimeter is configured to measure the vertical downward deformation velocity of the surface in front of the action force of the dynamic load. The vertically resilient deformation velocity and the vertically downward deformation velocity of the surface can be simultaneously and quickly obtained by the first and second types of velocimeters.