165 results about "Full field" patented technology

The invention belongs to the technical field of deep learning, and particularly discloses an ultra-precision full-field displacement measurement method and system based on a convolutional variational auto-encoder. Comprising the following steps: acquiring a video when a to-be-detected structure is subjected to vibration deformation, and selecting a picture of a deformation position to construct a data set; training a deep learning model of the convolutional variational auto-encoder based on the data set; reconstructing the gray value of the original image by using the trained deep learning model to obtain a gray value containing infinitesimal displacement information; and carrying out displacement calculation on the reconstructed image by utilizing an optical flow method, and realizing ultra-precision displacement calculation on the to-be-measured structure according to gray value conversion. According to the method, the problem that the infinitesimal displacement smaller than the sensitivity limit is difficult to measure is solved, the problem that the to-be-measured structure is blocked and cannot be measured is solved by utilizing the characteristics of the generative deep learning model, and the basic data precision of displacement measurement is remarkably improved.

The invention provides a crack identification method and system based on multi-modal data fusion, electronic equipment and a storage medium, and the method comprises the steps: firstly obtaining multi-modal data of a to-be-detected structure surface, specifically including an image sequence obtained by an acquisition module, full-field stress time sequence data and preset key part discrete point stress time sequence data; performing time synchronization calibration on the multi-modal data, mapping a stress field corresponding to full-field stress time sequence data to a pixel coordinate system of an image sequence through camera calibration parameters, and associating discrete point stress time sequence data to the pixel coordinate system to form a comprehensive data set of unified space coordinates; and finally, inputting the comprehensive data set into a trained multi-modal crack recognition model, and performing model recognition to obtain crack parameters and stress analysis results, thereby realizing crack recognition driven by multi-modal data fusion. Multi-modal data collaborative input overcomes the problems of misinformation, missing report and information loss of a single data source, and improves the accuracy and reliability of crack recognition.

The invention discloses a background schlieren method flow field flow velocity measurement method based on pseudo-schlieren images. The method comprises the following steps: constructing a background schlieren experiment measurement system; obtaining a speckle plate image sequence without a flow field background; obtaining a background distortion image sequence; obtaining a pseudo schlieren image sequence; and obtaining the final flow velocity of the flow field to be measured. The method has the advantages that a background plate distortion image sequence under the action of a flow field is collected through a high-speed camera, and pseudo-schlieren transformation processing is carried out through an improved mixed gradient operator and a multi-scale feature fusion technology; and a flow velocity field is solved in combination with a PIV-optical flow fusion algorithm, and real-time processing is realized through GPU parallel computing. The method breaks through the limitation that the traditional PIV technology depends on tracer particles, has the advantages of non-contact, full-field measurement, high temporal-spatial resolution and the like, and is particularly suitable for compressible flow field and turbulent flow field measurement. Experiments show that the method can realize high-resolution and high-frame-rate image processing, the uncertainty of flow velocity measurement is less than 3.2%, and a new technical means is provided for complex flow field diagnosis.

The invention discloses an in-situ three-dimensional full-field transparent visual evaluation method for a rock mass grouting modification effect, and relates to the technical field of geotechnical engineering.The method comprises the steps that S1, in-situ anisotropic sound wave CT data before and after grouting is collected in a target grouting area through a multi-azimuth sound wave ray cluster, and the CT data is obtained; obtaining a high-resolution three-dimensional anisotropic wave velocity field through anisotropic elastic wave inversion and physical constraint neural network super-resolution reconstruction, and automatically identifying a high-value region, a low-value region, a gradient mutation region and a stable region based on a wave velocity variation and a gradient change rate; according to the rock mass grouting modification effect in-situ three-dimensional full-field transparent visualization evaluation method, the scientificity, the fineness and the visualization level of rock mass grouting modification effect evaluation are remarkably improved, and powerful technical support is provided for guaranteeing project quality and optimizing grouting design.

The invention belongs to the technical field of three-dimensional vision measurement, and relates to a deformation measurement method and system of a composite vision measurement unit. The internal and external parameters of the binocular measurement unit are obtained according to the image of the thrust vectoring nozzle target area calibration plate; obtaining coordinates of all binocular measurement units in the same reference coordinate system according to the internal and external parameters and the images of the thrust vectoring nozzles with the first coded mark points, and obtaining coordinates of all binocular measurement units in a unified coordinate system; and acquiring full-field deformation of all target areas of the thrust vectoring nozzle according to the speckle images of the target areas of the thrust vectoring nozzle in the working state and the coordinates of the unified coordinate system of all binocular measurement units. According to the invention, a digital image correlation method and a close-range photogrammetry technology are utilized to realize coordinate system unification and full-field deformation measurement. Compared with a traditional method, the measurement times and data processing steps are reduced, and the measurement efficiency is improved.

The invention relates to an intelligent temperature control rock heat-water-force-sound-light multi-field coupling disturbance shearing device and a use method of the intelligent temperature control rock heat-water-force-sound-light multi-field coupling disturbance shearing device. A disturbance shearing mechanism composed of a trapezoid pressing rod, a constant damper and a spring is additionally arranged on the driving side of the lower shearing box. When the tangential loading shaft is propelled at a constant speed, the mechanism can convert stable linear displacement into disturbance shear load of periodic loading and unloading, so that engineering power disturbance is simulated. According to the device and the method, periodic shear disturbance is synchronously applied to a rock sample in a high-temperature seepage environment, mechanical response, seepage characteristic change, internal micro-fracture and surface full-field deformation of the rock sample are comprehensively observed, and an advanced test means is provided for researching a catastrophe mechanism of a deep rock mass under the action of multi-field coupling and dynamic disturbance.

The invention relates to the technical field of optical three-dimensional measurement and metering, and discloses a single-camera three-dimensional coordinate measurement method and system based on full-field distance measurement, and the method comprises the following steps: S1, building a calibration field containing a control point, shooting an image of the calibration field through a monocular camera, extracting the image coordinate of the control point, carrying out the camera calibration, and obtaining a calibration field; obtaining internal parameters and external orientation parameters of the camera; and S2, controlling the laser range finder to aim at the control point in the calibration field through the non-orthogonal double-axis turntable. Submillimeter-level high-precision measurement can still be realized under the condition of a short baseline, and the problems that the precision in the depth direction is insufficient, the baseline requirement is long, parameters are easy to drift and the like in traditional stereoscopic vision measurement are effectively solved. By introducing a non-orthogonal double-shaft turntable and a visual guidance laser aiming mechanism, autonomous, rapid and accurate measurement of multiple measurement points in a large field of view is realized, and the automation degree and reliability of measurement in a complex environment are remarkably improved.

The invention relates to the technical field of pathological section image recognition, in particular to a method for accurately predicting clinical prognosis of a colorectal cancer patient, which comprises the steps of full-view digital section acquisition, full-view digital section preprocessing, Transformer-dynamic agency attention-Mama network and interpretability analysis. According to the method, firstly, a tissue slice segmentation unit and a preliminary feature extraction unit are integrated, full-view digital slice feature extraction is achieved, then a Transformer-dynamic agency attention coupling architecture is adopted, time sequence dependence modeling is achieved through a multi-layer Mama module, finally, a feature aggregation unit is used for outputting patient risk scores, and the patient risk scores are obtained. And realizing visual explanation of the model decision by adopting a thermodynamic diagram. According to the method, through fusion of long sequence data processing, a dynamic agency attention mechanism and a state space modeling technology, the technical bottlenecks of insufficient feature characterization capability, difficulty in long-range dependence modeling and the like in traditional pathological image analysis are solved.

The invention discloses a non-contact measurement system and method for full-field deformation of a fuselage in an airplane crash test, and belongs to the technical field of airplane structure strength testing, and the method comprises the steps: making a high-quality speckle pattern on the surface of the fuselage, and laying cooperation mark points; a binocular camera flexible self-calibration method is used for completing calibration of the stereo measurement system; unification of global coordinates of multiple systems is assisted through unmanned aerial vehicle photogrammetry; a synchronous controller is adopted to trigger multiple sets of systems to synchronously collect images in the falling and collision process; obtaining the motion trail and speed of the key measuring point based on a mark point positioning tracking and stereoscopic vision principle; acquiring a full-field three-dimensional displacement field and a strain field based on a digital image correlation method guided by a control point and a stereoscopic vision principle; and deformation visualization representation is realized through image splicing and data fusion. According to the invention, non-contact, high-precision and full-field dynamic measurement of the three-dimensional deformation field in the falling and collision process of the whole large aircraft is realized, and technical support is provided for analysis and evaluation of falling adaptability of the aircraft structure and verification of anti-falling and anti-collision design.

The invention relates to the technical field of strain measurement, in particular to a three-dimensional full-field strain measurement method and system based on multi-view collaboration, and the method comprises the steps: constructing a sparse topology skeleton model of a measured target under a global coordinate system, and building a bidirectional projection mapping relation between the global situation and each local situation; the method comprises the following steps: synchronously acquiring a time sequence texture feature image of a measured target, calculating a luminosity geometric coupling confidence tensor of each pixel point and extracting an initial texture feature field under each view angle; utilizing a skeleton model to guide the initial texture feature field to perform limited local matching, and resolving to obtain a local independent displacement field and residual energy distribution of each view angle; performing multi-view weighted fusion based on a bidirectional projection mapping relation, and reconstructing a global three-dimensional displacement field; and performing differential calculation on the global three-dimensional displacement field to obtain a deformation gradient tensor and generate three-dimensional full-field strain distribution. According to the method, gradient mutation caused by view field splicing errors can be effectively inhibited, and physically real and full-field continuous three-dimensional strain distribution is obtained.

The invention discloses an object tiny deformation measurement method and system based on interference fringe analysis, and belongs to the technical field of optical measurement. The method comprises the following steps: acquiring an interference fringe image and probe position and direction data; carrying out phase demodulation and sensitivity vector calculation on the surface of a measured object; obtaining the local phase number of each probe according to the interference image; calculating sensitivity vector data through a geometrical relationship; obtaining global phase and sensitivity data, obtaining initial full-field phase data through a weighted fusion method based on a geometrical relationship between a sensitivity vector and a deformation direction, calculating a consistency error, judging whether the consistency error exceeds a threshold value or not, if so, updating a deformation direction estimation value, and executing fusion processing again; and solving and obtaining three-dimensional deformation field data through a linear relation until the error meets the requirement or reaches the maximum number of iterations. According to the invention, the reliability and early warning capability of structural safety assessment in long-term monitoring can be improved.

The invention discloses a multi-field coupling intelligent inclination angle plane physical similar simulation experiment system and method. The system comprises an experiment platform with a controllable inclination angle, a stress monitoring module, an optical deformation monitoring module and an acoustic emission monitoring module. The experiment platform realizes high-precision adjustment and stable maintenance of an inclination angle of + / -0.1 degree through cooperation of hydraulic drive and a mechanical lock. The stress module adopts a wireless sensor network to monitor a stress field; the optical module is used for measuring full-field displacement strain based on a CCD camera and a digital image related technology; and the acoustic emission module positions a rock stratum fracture signal through the probe array. The method comprises the steps of platform deployment, inclination angle adjustment, system debugging, synchronous mining monitoring and the like. According to the invention, inclination angle accurate control and multi-physical field information synchronous integrated acquisition are realized, and the system is suitable for inclined coal seam mining rock stratum movement and disaster mechanism research.

This application provides a vibration element measurement device, comprising: a laser assembly for illuminating the test area of ​​the vibration element under test, wherein the surface of the vibration element under test located in the test area is provided with speckle patterns; two camera assemblies, respectively arranged on both sides of the test area of ​​the vibration element under test, for capturing speckle images of the vibration element under test during its movement; and a gimbal, on which the two camera assemblies are mounted, the gimbal being used for off-axis focusing of the camera assemblies. By arranging the two camera assemblies on both sides of the test area of ​​the vibration element under test and using the gimbal for off-axis focusing, the two camera assemblies can achieve full-field focusing of the test area of ​​the vibration element under test, thereby acquiring clear speckle images of each speckle pattern, thus achieving accurate measurement of the three-dimensional displacement and / or strain of the vibration element under test.

The present application belongs to the technical field of material deformation test, and discloses a method and system for real-time synchronous measurement of full-field three-dimensional deformation field and temperature field based on fluorescence speckle. The method comprises the following steps: S1, calibrating the curve relationship between the gray scale ratio and the temperature; S2, obtaining the matching points of each to-be-measured point in the reference image under each angle in the deformation image at all time instants, and the matching points of each point in the images of different angles at the same time instant; and S3, calculating the three-dimensional deformation field and the temperature field of the surface of the to-be-measured sample at each time instant. The present application also discloses a system for the above method. Through the present application, the synchronous three-dimensional measurement of the deformation field and the temperature field of the surface of a component is realized, the temperature measurement range is wider, the cost is lower, and the operation is simple.

According to the full-field coherence tomography device and method based on ultrasonic rotation and bidirectional interference, a Kohler illumination system forms parallel light which enters an interference and shunt unit, and the interference and shunt unit divides the entering light into a reference arm and a sample arm; the sample arm unit divides a sample arm light path into two sample light paths to irradiate the upper side and the lower side of the same sample; the reference arm unit realizes optical path selective matching of phase displacement and two sample optical paths; the ultrasonic rotating unit enables the sample to be in a non-contact suspension state and rotate according to a set angle so as to obtain multi-direction interference information; the imaging and acquisition unit focuses and detects light returned by the reference arm and the sample arm; and the switching and fusion unit switches the state of the reference arm, so that the reference arm is respectively matched with the two sample light paths, interference acquisition, demodulation and three-dimensional reconstruction of interference fringes and fusion of up-down bidirectional and multi-angle data are completed, and a high-penetration three-dimensional imaging result is obtained. According to the invention, the penetration depth can be enhanced, the three-dimensional reconstruction quality is improved, and non-contact operation is realized.

Exemplary systems, method and compute-accessible medium can be provided, e.g., for a visual stimulation or an optogenetic activation during a scan of at an object. For example, it is possible to utilize a controller which can be configured to receive signal information regarding the scan, and to precisely control a light engine. The exemplary control of the light engine can be used to activate and deactivate a light source or a plurality of light sources (e.g., one or more at least one light emitting diodes). using the signal information. For example, a digital micromirror device can be utilized through which the light engine is precisely controlled for a full field projection, or patterned projection, wherein the light engine can comprise up to eight high power light sources.

The application discloses a digital phase-shifting phase recovery method of ESPI fringe pattern based on distance mapping, which comprises the following steps: 1) extracting the direction of each pixel point of the fringe pattern, and then calculating the normal curve of the fringe according to the fringe direction to obtain the moving direction of the fringe; 2) extracting the center line of the dark fringe, calculating the width of the fringe according to the center line of the fringe, and obtaining the moving distance of the fringe through distance mapping; 3) comprehensively moving the direction and the distance, and performing digital phase-shifting on the initial fringe pattern point by point, and adopting the bilinear gray interpolation to obtain the fringe pattern after digital phase-shifting; 4) calculating the wrapped phase corresponding to the fringe pattern; and 5) performing unwrapping processing on the wrapped phase to recover the full-field phase of the fringe pattern. The application extracts the phase through the digital image processing technology on the single fringe pattern, avoids the problem of inaccurate phase-shifting existing in the traditional physical phase-shifting technology in dynamic measurement, and can effectively improve the accuracy of the phase recovery of the single fringe pattern.

The invention discloses a rotating equipment fault diagnosis method based on machine vision, and the method comprises the steps: carrying out the preprocessing of a two-dimensional image frame in an input video, and obtaining a preprocessed two-dimensional image; performing multi-scale decomposition on the preprocessed two-dimensional image according to a complex controllable pyramid to obtain phase and amplitude information; according to the phase information, continuous vibration displacement in the horizontal direction and the vertical direction is obtained; performing modal decomposition on the continuous vibration displacement in the horizontal direction and the vertical direction to obtain a series of intrinsic mode components; selecting a series of intrinsic mode components corresponding to the horizontal direction and / or the vertical direction, calculating kurtosis values, and selecting the intrinsic mode component with the maximum kurtosis value to draw an envelope spectrum of the intrinsic mode component; and calculating the theoretical fault characteristic frequency of the rolling bearing, and searching in the obtained envelope spectrum to complete fault type identification. Motion estimation is carried out through the high-speed camera, and the method has the advantages of being low in cost, high in flexibility, capable of carrying out full-field measurement and the like, and has certain significance in development of the future research and fault diagnosis field.

The application relates to the technical field of electronic data digital processing, and discloses a two-end full-frame support beam stress state in-situ finite element simulation method based on mixed reality. The method obtains a three-dimensional geometric model of a support beam and a support base through a mixed reality device, and utilizes a high-frame-rate camera to capture full-field displacement data under an excited state; a finite element model taking the rotation stiffness of the support base as an unknown parameter is constructed, and a real stiffness value is reversely identified through an iterative optimization algorithm; the corrected model is solved under a design load, and stress, strain and deformation nephograms are spatially registered and superimposed on the real structure through the mixed reality device. The system comprises five modules, namely, three-dimensional perception, micro-variation capture, boundary identification, model updating and mixed reality visualization. The application realizes accurate in-situ boundary condition identification, non-contact nondestructive testing and immersive visual evaluation, and significantly improves the accuracy and efficiency of structural safety analysis.

The present invention relates to a system (1) for in vivo full-field transmission interference cell resolution imaging of an eye (6) of an individual and to a method (100) for in vivo full-field transmission interference imaging of an eye (6) of an individual.

1. The name of the design product: high-resolution microwave full-field deformation and vibration displacement measuring instrument. 2. The use of the design product: applied to the monitoring of vibration, displacement and deformation of aerospace, large bridges, buildings and structural parts. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application provides a high-precision calibration method, device and equipment for mapping camera interior orientation elements and a storage medium. The method comprises the following steps: firstly, using a collimator and an electronic theodolite to independently calibrate the rotary table angle positioning error and the parallel light tube optical axis pointing deviation, respectively, to generate an error correction model and a space angle matrix, and converting the device system error into a known quantity that can be compensated; secondly, using a positive and negative mirror center-finding method to iteratively converge to determine the accurate intersection point of the sight axis and the target surface as the main point initial observation value and the sight axis reference angle, and eliminating the uncertainty of the main point; finally, starting from the reference angle to perform full field scanning and collection, and jointly substituting the corrected angle data, the angle matrix and the main point observation value into the collinearity condition equation for overall adjustment solution, so that the interior orientation elements and the distortion parameters purely reflecting the characteristics of the camera itself are solved under the premise that various system errors have been stripped one by one.

The present invention discloses a method for measuring the full-field displacement and rotation angle of a frame structure based on finite element and optical flow methods. The method comprises the following steps: performing unit segmentation on a target structure image to determine displacement boundary conditions; determining a first relationship between the image displacement of each pixel point within each unit in the target structure image and the corresponding unit node displacement based on the optical flow method and finite element theory; assembling the node displacement vectors of each unit in the overall coordinates into a structure overall node displacement vector using a unit coordinate transformation matrix and an assembly matrix, and determining a vector relationship between the image displacement of each pixel point and the structure overall node displacement at any given time; solving the vector relationship, performing frequency domain decomposition on the time domain displacement of the overall degree of freedom of the structure, obtaining structural modal parameters, and completing full-field displacement and rotation angle measurement of the target structure. The present invention combines finite element and optical flow methods to improve recognition accuracy and can be widely applied in the field of computer technology.

The present application relates to pathological section image recognition technical field, specifically to a kind of accurate prediction colorectal cancer patient clinical prognosis method, including full field digital slide acquisition, full field digital slide preprocessing, Transformer-dynamic proxy attention-Mamba network and explainability analysis.The method first integrates tissue section segmentation unit and preliminary feature extraction unit, realize full field digital slide feature extraction, then adopt Transformer-dynamic proxy attention coupling architecture, and realize time series dependence modeling by multilayer Mamba module, finally use feature aggregation unit to output patient risk score, and use heat map to realize the visualization explanation of model decision.The present application solves the technical bottlenecks such as insufficient feature representation ability and long-range dependence modeling difficulty in traditional pathological image analysis by fusing long sequence data processing, dynamic proxy attention mechanism and state space modeling technology.

The invention relates to the technical field of mechanical property testing, in particular to a laminated plate mechanical property evaluation method and system based on strain data. The method comprises the following steps: performing a biaxial tensile experiment on a laminated plate sample, synchronously acquiring load time-history data and a full-field speckle image, constructing a full-field strain matrix through a mapping algorithm, dispersing the full-field strain matrix into nodes, dividing a core pure shear region and a stress diffusion region, and then obtaining first principal strain through principal component analysis; a load transmission efficiency attenuation spectrum and full-field strain energy entropy density are calculated respectively, a dynamic correction model is constructed in combination with weighted coupling of preset shape characteristic parameters, and a real constitutive curve is obtained by using the model to calculate correction coefficient inversion nominal stress; the thermodynamic entropy characteristic is introduced, so that the problem that the stress field distortion at the nonlinear damage stage of the material is difficult to sense by a traditional method is solved, and the biaxial mechanical property test precision of the laminated plate is effectively improved.

The embodiments described herein provide a metrology tool and method for acquiring a full field optical field of an optical device to determine a number of metrology metrics of the optical device. The metrology tool is utilized to split a light beam into a first light path and a second light path. The first light path and the second light path are superimposed into a superimposed light beam and sent to a detector. The detector measures the intensity of the superimposed light beam. The first and second equations are utilized in combination with the intensity measurements to determine the amplitude and phase ip at a reference point directly adjacent to the second surface of the at least one optical device.

This invention relates to a method, system, and medium for monitoring large structural displacements based on zero-shot unsupervised video segmentation and super-resolution. The monitoring method includes: acquiring a monocular low-resolution video sequence of the structure; automatically generating a temporally consistent mask of the structural target throughout the entire video sequence by inputting simple prompt information in the first frame based on a zero-shot video segmentation model; spatially cropping and reducing the dimensionality of the video sequence using this mask; enhancing the resolution and denoising the processed video using a super-resolution reconstruction network based on unsupervised degradation modeling; analyzing frame-by-frame using an improved dense inverse search optical flow algorithm to extract the full-field displacement field of the structural surface; performing statistical analysis; and finally outputting the displacement response of the entire structure or key parts. Compared with existing technologies, this invention achieves non-contact monitoring without target points, making it particularly suitable for architectural heritage and effectively improving the accuracy and robustness of displacement monitoring under complex conditions such as low resolution, noise, lighting changes, and occlusion.

The invention discloses an electron beam focusing parameter adaptive calibration method based on regional recursive splitting and analytic field guidance, and belongs to the technical field of electron beam equipment precision control. In order to solve the problems of low full-field uniform sampling efficiency and poor sparse sampling precision in large-view-field electron beam processing, the invention provides a dual-drive adaptive sampling strategy. According to the method, a theoretical curvature distribution diagram is constructed by using an electron optical analytical field to serve as prior guidance, and a distortion sensitive area in a view field is identified according to a multi-dimensional feature fusion criterion of physical prior, differential field nonlinearity and an actual measurement form; a recursive regional geometric subdivision structure is adopted to perform recursive splitting and encrypted sampling on the sensitive region, and narrow window rapid search is realized in combination with a parameter inheritance strategy; and finally, reconstructing a full-field high-precision model based on a scattered data interpolation algorithm. According to the method, sparse sampling can be automatically carried out in the smooth field curvature change region, encryption sampling can be carried out in the severe distortion region, and the calibration efficiency is remarkably improved on the premise of ensuring high focusing precision.

1. Name of the product in this design: Swimming Goggles (Full Field of Vision, Frameless). 2. Purpose of this design: This design is for use as swimming goggles worn while swimming. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention belongs to the technical field of experimental mechanics and precision optical measurement, and particularly relates to a magneto-rheological shock absorber full-surface deformation monitoring system, which comprises an annular multiplexing image acquisition array unit, which comprises six high-speed industrial cameras uniformly arranged on an annular rigid bracket, and the optical axes of the high-speed industrial cameras point to the center of a measured object; the stereoscopic vision measurement unit chain is used for enabling the six high-speed industrial cameras to form six stereoscopic vision measurement units which are connected end to end through multiplexing of adjacent view fields; the synchronous control unit is used for controlling the high-speed industrial camera to perform synchronous exposure acquisition in a microsecond error range; the calculation processing unit is used for executing closed-loop global calibration, three-dimensional point cloud reconstruction, coordinate system unification and full-field strain calculation; on the basis, the limitation that independent binocular systems need to be stacked in traditional annular detection is broken through, 360-degree full coverage of binocular stereoscopic vision can be achieved only through six cameras by means of adjacent multiplexing topological structures, and the hardware cost is remarkably reduced.