528 results about "Visual angle" patented technology

The invention provides a visible light and thermal infrared image target fusion detection method for the visual angle of an unmanned aerial vehicle, and belongs to the technical field of image processing, and the method comprises the steps: carrying out the preprocessing and data enhancement of a data set of visible light and thermal infrared images of a detection region obtained by the unmanned aerial vehicle, and obtaining a plurality of initial images; initial images under different scales are analyzed based on a multi-scale dynamic feature pyramid network, fusion processing is carried out on the initial image under a visible light mode and the initial image under a thermal infrared mode based on an attention fusion mechanism, a candidate area is locked, and then highlighting processing is carried out on a tiny target, a long-distance target and the candidate area; and splitting all the target samples to obtain a training set and a verification set, training a preset network model based on the training set to obtain an initial detection model, and performing model performance evaluation and model optimization on the initial detection model based on the verification set to obtain a target detection model. The problem of target detection challenge of the unmanned aerial vehicle in a complex environment is solved.

The invention relates to a multifunctional deformation measurement device and a measurement method, and belongs to the technical field of thermal deformation measurement. Manufacturing a multifunctional deformation measuring device; marking the test piece to be tested; calibrating the precision of the measurement system by using a reference standard substance; a temperature sensor is installed on the test platform; vacuumizing treatment is conducted through a vacuum system; temperature control is carried out through a temperature precise regulation and control module; forming a heat radiation boundary; adjusting the visual angle and focal length of the measuring camera; adjusting a monochromatic illumination light source to realize light coverage on the tested piece; spraying speckles on the test piece to be tested; measuring the initial state of the tested piece; temperature control is carried out through a temperature precise regulation and control module; testing and recording the deformation condition of the tested piece at each temperature point in the whole test process; the method can solve the problems that a measurement test piece is only limited to a material-grade sample, the measurement environment simulation application range is small, the measurement error is large and the like in a traditional method, and is used for guaranteeing high-precision measurement of thermal deformation of a large-size composite material structure of a spacecraft.

The invention discloses a force feedback exoskeleton and a humanoid robot imitation learning method. The force feedback exoskeleton comprises a bearing part, an arm exoskeleton part and a data glove part. The number of the arm exoskeleton parts is two, the two arm exoskeleton parts are symmetrically connected to the backpack part, and the number of the data glove parts is two so as to collect position and posture information of the left hand and the right hand respectively. The humanoid robot imitation learning method is based on same double-arm characteristics and operator visual angle image input, is combined with nodal topology correlation organization of human joints, integrates multi-modal data information, and outputs control quantity which is almost the same as expert operation. The system is applied to the technical field of exoskeletons, high-quality data acquisition can be realized while the exoskeleton is lightweight and integrated, the number of degrees of freedom of data acquisition of traditional exoskeletons is greatly increased, and the system can be used for guiding collaborative movement of double mechanical arms and further effectively applied to flexible operation tasks of humanoid robots.

The invention relates to the technical field of chip optical detection, and discloses a high-precision defect detection method and system for a semiconductor chip. Initial detection data are obtained through laser scattering and photo-thermal microscopic detection, key visual features are extracted and converted into a multi-dimensional visual feature matrix, and the multi-dimensional visual feature matrix is used for detecting the defects of the semiconductor chip; according to the method, a fuzzy sensing area is positioned and potential defects are identified by using a map clustering algorithm, adaptive analysis of a supplementary visual angle is carried out and supplementary detection data is generated, and finally defect identification is carried out through the supplementary data and popularity information to obtain a chip defect result. The method effectively improves the precision and reliability of defect detection, especially has obvious advantages in recognition of complex and fuzzy regions, and solves the problem of insufficient precision of single-path optical imaging detection in the prior art.

The invention discloses a tongue phase three-dimensional visual acquisition and reconstruction method, an acquisition instrument and a medium, and the method comprises the steps: obtaining the three-dimensional original point cloud data of a tongue body, and carrying out the preprocessing of the original point cloud data through a curvature-based adaptive filtering method; performing point cloud registration of the multi-view point cloud data by using a spherical hash-based point cloud registration algorithm; based on a greedy triangular reconstruction algorithm of normal vector consistency, constructing a triangular mesh model of the tongue body surface by gradually adding triangles meeting a normal vector consistency condition; and performing three-dimensional reconstruction of the tongue body based on the constructed triangular mesh model, and finally generating a three-dimensional shape of the tongue body. According to the method, through a greedy triangle reconstruction algorithm based on normal vector consistency, triangles meeting the normal vector consistency condition are gradually added, and the triangular mesh model of the tongue body surface is constructed. The reconstruction efficiency can be remarkably improved while high geometric accuracy is kept, and the method is suitable for fine reconstruction of the complex tongue body surface.

The invention discloses a visual angle tracking grating stereo display system comprising a 3D camera grating display device used for obtaining viewer 3D information; the eyeball position tracking module is used for acquiring real-time spatial position coordinates of the eyes of the audience relative to the 3D camera; the pose calibration module is used for acquiring a spatial relationship between the 3D camera and the display; and the visual angle rendering and grating interlaced graph generation module is used for calculating the spatial position of the human eyes on the display screen and the mapping of each grating strip in a screen pixel coordinate system after acquiring the positions of the eyes and the relative poses of the display screen and the 3D camera, generating a grating stereoscopic display image suitable for the eyes, and sending the grating stereoscopic display image to a display to be output. According to the method and the device, the viewpoint self-adaptive three-dimensional display of the eyes of one or more audiences is realized, the calculation complexity is reduced, the three-dimensional vision consistency can be ensured, the picture which should be seen by the viewing angle can be accurately rendered, and the problem of blurring or 3D picture distortion is avoided.

The invention discloses a scoliosis rapid screening method and device, and the method comprises the steps: S1, obtaining frame-by-frame images of a human spine through a visual sensor, and forming a human standing video sequence; s2, acquiring three-dimensional coordinate information of main skeleton key points of a human body; s3, analyzing the three-dimensional coordinate information of the main skeleton key points of the human body; s4, collecting human body front and back double-view-angle stoop motion videos through a color vision sensor; s5, carrying out frame-by-frame processing segmentation on the motion video sequence of human body stooping; s6, splicing the two-dimensional back contours extracted frame by frame to generate a complete back three-dimensional curved surface model; and S7, judging whether the scoliosis risk exists in the testee or not by combining the dynamic change indexes of the back contour features in the motion state, combining the back contour features of each frame extracted frame by frame and a plurality of indexes calculated according to the skeleton key points and inputting the indexes into the joint learning model.

The invention relates to the technical field of titanium alloy bar detection, and discloses a titanium alloy bar quality detection system and method. The system comprises a multi-modal data acquisition module, a detection reference dynamic optimization module, a data standardization processing module, a multi-modal feature fusion module, an intelligent defect identification and evaluation module, a quality grade evaluation module and a quality detection report generation module. When the quality of the titanium alloy bar is detected, through a multi-mode nondestructive detection mechanism integrating ultrasonic detection data, optical surface detection data and eddy current electromagnetic detection data, all-dimensional defect information of the interior, the surface and the near surface of the bar is synchronously obtained, and complementation and cross validation of the multi-mode detection data are achieved; the problem of limitation of a single sensor detection visual angle is solved, the missed detection and misjudgment risks are reduced, and the comprehensiveness and reliability of a defect detection result are ensured.

The invention relates to the technical field of image processing, and discloses a gas pipeline appearance quality detection method based on vision. Comprising the steps of obtaining a first X-ray image of the gas pipeline, generating a first recognition image, generating a concave area, obtaining a second X-ray image of the gas pipeline, generating a second recognition image, generating a crack area, collecting comprehensive quality data, generating a quality evaluation index, marking a dangerous crack and making a quality detection report of the gas pipeline. Compared with the prior art, the position and morphological characteristics of the crack structure in the gas pipeline can be comprehensively and stereoscopically displayed, the limitation of a visual image in a single visual angle or a specific range on crack structure display is avoided, the situation of visual dead angles is effectively avoided, and therefore comprehensive quality data can be accurately collected; and the quality evaluation index is calculated, so that a detection evaluation report is made for the gas pipeline, and the visual detection accuracy of the appearance quality of the gas pipeline is improved.

The present application provides an iris recognition method and apparatus, an electronic device, and a storage medium. The method comprises: obtaining an iris image group acquired for an object to be recognized, wherein the iris image group comprises at least two iris images acquired at different acquisition angles for a same eye region of said object; performing stereo matching on the at least two iris images to obtain a disparity map between the at least two iris images, wherein the disparity map comprises disparity elements, and each disparity element represents a displacement amount in a specified direction between two pixel points corresponding to a same eye region element in the at least two iris images; in one iris image among the at least two iris images, determining a pupil edge on the basis of the displacement amounts; determining an iris region in the iris image on the basis of the pupil edge, and performing feature extraction on the iris region to obtain an iris feature; and performing identity recognition on said object on the basis of the iris feature.

The embodiment of the invention discloses an aluminum plastic package detection method and system based on machine vision, and the method comprises the steps: carrying out the noise reduction processing of a single-visual-angle detection image of an aluminum plastic package, obtaining a noise reduction detection image, extracting an abnormal feature region, and obtaining an initial detection result; establishing a semantic association rule of a pre-trained semantic rule mapping model and the quality detection demand label of the aluminum plastic package; a synchronous quality control instruction in the production link of the aluminum plastic package is used as a semantic adaptation trigger condition, and an adjustment strategy of a semantic weight distribution unit is calibrated and activated; inputting the initial detection result into a semantic rule mapping model to perform semantic dimension priority ranking on abnormal features in the initial detection result to obtain an abnormal feature ranking result; and in combination with the defect judgment model and a defect grading rule in a current production scene corresponding to the production link, performing matching judgment on the abnormal feature sorting result, and outputting a defect judgment conclusion adaptive to the current production scene.

The invention relates to the technical field of image data processing, in particular to a skeleton spacing detection method based on a high-strength alloy template structure, and the method comprises the steps: obtaining a skeleton gray image, constructing the three-dimensional point cloud data of a high-strength alloy template structure skeleton, and obtaining a point cloud skeleton region and a local skeleton region; obtaining the information credibility of the point cloud skeleton region according to the difference between the gray fluctuations of each local skeleton region corresponding to the same position in the skeleton gray image at different angles and the abundant conditions of the visual angle and the gray information; obtaining a shape error coefficient of the point cloud skeleton region according to a region matching relationship and a data difference between each point cloud skeleton region and the standard point cloud data; and in combination with the information credibility and the shape error coefficient, screening the edge feature points according to the discrete feature distribution condition of each edge feature point, and determining a skeleton spacing detection result according to a screening result. According to the invention, a more accurate skeleton spacing detection result can be obtained.

The invention discloses a 35mm breathing-eliminating full-frame camera lens, and aims to solve the problems that in the prior art, when a visual angle is slightly enlarged or shrunk due to focus change, unnecessary jitter of a picture is caused, the fluency and ornamental value of a video are influenced, and the visual angle is slightly enlarged or shrunk. The lens comprises a variable diaphragm, and a first lens group, a second lens group and a third lens group which are sequentially arranged from an object side to an image side, the first lens group is composed of seven lenses and serves as a fixed group of the camera lens, and the focal power is positive; the iris diaphragm is located between the first lens group and the second lens group; the second lens group is composed of three lenses and serves as a focusing group of the camera lens, and the focal power is positive; the third lens group is composed of two lenses and serves as a fixed group of the camera lens, and the focal power is negative.

The invention relates to the technical field of two-phase flow mass flow rate measurement, in particular to a gas-solid two-phase flow mass flow rate measurement device and method based on scattered light imaging. The measuring device comprises an orthogonal laser light source module used for outputting two laser beams which are orthogonal to each other and coincide with the cross section and the longitudinal section of a gas-solid two-phase flow field; the different-magnification scattered light capturing module is used for capturing a longitudinal section conventional-resolution image sequence and a longitudinal section high-resolution image sequence of a longitudinal section visual angle illuminated by the laser beam coinciding with the longitudinal section of the gas-solid two-phase flow field; the cross section scattered light capturing module is used for capturing a cross section conventional resolution image sequence of a cross section visual angle illuminated by the laser beam coinciding with the cross section of the gas-solid two-phase flow field; and the image processing module is used for receiving and processing the longitudinal section conventional resolution image sequence, the longitudinal section high resolution image sequence and the cross section conventional resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

The invention discloses a maintenance platform and new energy automobile maintenance equipment and method, and belongs to the technical field of new energy automobile maintenance. Aiming at the problems that visual angle blind areas exist in existing detection, manual errors are large, bolts are prone to missing, and a cover plate is difficult to disassemble, the equipment is provided with a clamping structure driven by a two-way lead screw through a maintenance platform body, and two sets of liftable moving plates are matched with L-shaped clamping plates to achieve multidirectional stable clamping of a battery pack; according to the double-high-definition-camera mobile detection mechanism, a rack-gear-worm transmission assembly triggered by the end of a mobile table is used for driving a battery pack to rotate intermittently in a one-way mode, and a secondary driving mechanism is formed by a hydraulic cylinder and a trapezoidal plate in a matched mode. Maintenance equipment is integrated with a magnetic type bolt collecting device, and an adsorption seat moves to drive a vacuum suction cup to automatically lift a cover plate. Through mechanical transmission and hydraulic linkage design, full-process automatic improvement of battery pack detection, bolt management and cover plate disassembly and assembly is structurally realized, and the safety and efficiency of new energy automobile battery maintenance operation are effectively improved.

The invention discloses a monocular visual odometer method and system based on aerial view representation and differentiable weighted Procrustes solver, and the method comprises the steps: constructing a pose estimation model which can carry out the extraction and matching of key points in an aerial view, and carries out the relative pose estimation through an interpretable weighted Procrustes solver; the method comprises the following steps: constructing a loss function based on pose information, optimizing parameters of a pose estimation model by using the loss function, and performing pose information estimation between two frames of monocular images by using the parameter-optimized pose estimation model to realize the monocular visual odometer, so that the monocular visual odometer is superior in the aspect of reducing scale drift; and stable performance is shown under different weather and illumination conditions.

The utility model relates to the technical field of explosive ordnance disposal devices, in particular to a three-position vision auxiliary explosive ordnance disposal robot gripper which comprises a gripper base, a power device and a gripper body, the power device is arranged on the gripper base, the gripper body is movably arranged at the front end of the gripper base, the gripper body is in transmission connection with the power device, and the power device is arranged on the gripper base. The multi-dimensional visual auxiliary assembly comprises a first visual part, a second visual part and a third visual part, the first visual part is arranged on the end face of the front end of the gripper base and right faces a clamped object, and the second visual part is arranged on the end face of the front end of the gripper base and right faces the clamped object. The second visual part and the third visual part are respectively arranged at different positions on the claw body so as to provide different visual angles, and the three-position visual auxiliary explosive ordnance disposal robot claw has the following beneficial effects that the three-position visual auxiliary explosive ordnance disposal robot claw provided by the utility model has the effect of assisting an operator in quickly clamping.

The invention relates to the technical field of automobile data recorders, in particular to an automobile data recorder, which is characterized in that an automatic adjustment lens structure allows the automobile data recorder to perform real-time adjustment according to different illumination and environmental conditions, and can provide optimal visual angle setting in various driving scenes; wherein the design structure of the camera module avoids a common high distortion phenomenon in a traditional lens; by reasonably configuring the shape and the refractive index of the lens, the geometric integrity of an image can be kept under a large visual angle, so that shot sceneries and objects are not distorted, meanwhile, a non-gluing design is adopted, performance reduction caused by environmental changes (such as temperature and humidity) is avoided, the lens can still keep stable optical performance and image quality under different use conditions, and the lens can be widely applied to the field of camera shooting. The problems of aging and optical degradation possibly occurring in long-time use of the glued lens are solved.

The invention discloses a construction safety management method based on excavator visual angle image fusion, and belongs to the technical field of construction early warning, and the method specifically comprises the steps: obtaining the position and working condition of excavation equipment, and setting a dynamic alarm fence; triggering an equipment vision device to scan a personnel target in real time, identify a personnel bounding box and extract a personnel identity identification code; synchronously calling original coordinates of the corresponding ultra-wideband tag, capturing a posture visual frame, and generating a posture feature vector through skeleton joint point topology analysis; inputting the attitude vector into an attitude-error compensation model, and outputting a positioning offset predicted value to correct an original coordinate; according to the method, real-time compensation is carried out through dynamic accurate matching of the construction dangerous area and personnel positioning errors, misjudgment is avoided to the greatest extent, the safety risk active pre-judgment and alarm accuracy is improved, and the safety risk active pre-judgment and alarm accuracy is improved. And intelligent safety management of a construction site is realized.

The invention discloses a light-transmitting power generation glass film layer detection method, device and equipment and a medium. The method comprises the following steps: obtaining a detection image of a target piece based on a set visual angle; wherein the target piece is a to-be-detected power generation glass film layer, and the set visual angle is a visual angle which is opposite to the power generation glass film layer and is provided with four-side clearing areas; according to the detection image, identifying whether the target piece has a first type of defects; wherein the first type of defect is that the four-side cleaning area has dimensional deviation; if the first type of defects exist, marking the target piece as a scraped product; if the first type of defects do not exist, whether the target piece has a second type of defects or not is recognized according to the detection image; wherein the second type of defect is that residues exist in the four-side cleaning area; if the second type of defects exist, marking the target piece as a repair product; the method has the advantages that the cleaning conditions of the cleaning areas on the four sides of the power generation glass film layer can be accurately detected, and a reference basis is provided for subsequent processing.

The endoscope comprises an insertion tube, a tip part, a first bending control wire and a second bending control wire, and the insertion tube comprises a main body section, a first bending adjustment section and a second bending adjustment section which are sequentially arranged from the near end to the far end; the far end of the first bending control wire is connected to the first bending adjusting section; the far end of the second bending control wire is connected to the second bending adjusting section; the tip part is connected to the far end of the second bending adjusting section, and a camera is arranged on the tip part. According to the endoscope, the first bending adjusting section and the second bending adjusting section which can be bent independently are arranged on the insertion tube, the visual angle of the camera on the tip part can be adjusted through double-section bending adjustment, the visual field range which can be observed by the endoscope is wider, the operation of surgical instruments and the excision condition of diseased tissue can be better observed through the endoscope, and the operation efficiency is improved. And the surgical operation difficulty of surgical operators can be reduced to a great extent.

The invention provides a light guide element which comprises a body and a first optical microstructure. The body has a first surface, a second surface and a light incident surface. The first optical microstructure comprises a first light facing surface. The first optical microstructure takes the first reference plane as a symmetry plane. The first reference plane is perpendicular to the second surface and passes through the vertex of the first optical microstructure. The boundary of the first light facing surface and the first reference plane has a first central symmetry curve. The first central symmetric curve has at least one inflection point. A first intersection arc line is formed at the junction of the first light facing face and the second face, and the curvature radius of the first intersection arc line is a fixed value. The invention further provides a backlight module comprising the light guide element. According to the light guide element and the backlight module, the visual angle can be adjusted to be concentrated, and the overall luminous intensity is effectively improved.

The invention relates to the technical field of anti-counterfeiting, and discloses an anti-counterfeiting element which comprises a base material, the surface of the base material is provided with a feature area, and the feature area comprises a plurality of curved surface structures; the curved surface structure has a first direction and a second direction which are parallel to the surface of the base material, the curved surface structure is bent in the first direction, and the bending degree of the curved surface structure in the second direction is smaller than that of the curved surface structure in the first direction. The plurality of curved surface structures are arranged in the characteristic area, and each curved surface structure is bent along the first direction, so that the emergent light of the curved surface structures can be emitted in a fan-shaped direction range under the incident light in the preset direction, the angle distribution of the emergent light is more uniform, and the light emitting efficiency is improved. Therefore, even if a single curved surface structure can obtain a combined effect equivalent to that of a plurality of reflective facets in the prior art, not only can a dynamic effect with higher resolution be realized, but also a finer and more stable appearance pattern can be realized, and the visual angle range is widened.

The invention discloses a three-dimensional style migration method and device and a storage medium, and relates to the technical field of computer vision, and the three-dimensional style migration method comprises the following steps: adjusting a preset stylized three-dimensional Gaussian sputtering model based on an obtained target intensity vector of an adjustable style adjuster, the style intensity vector of the adjustable style regulator is associated with the attribute of each Gaussian ball in the stylized three-dimensional Gaussian sputtering model, and the style intensity vector of the adjustable style regulator is associated with the attribute of each Gaussian ball in the stylized three-dimensional Gaussian sputtering model; and carrying out style migration on the target scene based on the adjusted stylized three-dimensional Gaussian sputtering model. According to the method, through the stylized three-dimensional Gaussian sputtering model with the adjustable strength, the style images with the ideal migration degree and multiple visual angles can be obtained, and the flexibility of migration degree control of three-dimensional style migration is improved.

The invention discloses a dynamic semantic vision SLAM (Simultaneous Localization and Mapping) method based on point and line feature adaptive weighting. The method comprises the following steps: firstly, obtaining potential dynamic region prior by combining target detection and image segmentation; then adaptive weighting is carried out on point and line features in two stages: in the first stage, initial weighting is carried out based on motion consistency check and dynamic levels, and feature matching and pose preliminary estimation are realized; in the second stage, weighting is further carried out on the key frame level through multi-view consistency verification, and weighted optimization and map maintenance are combined; and finally, loopback verification and global optimization are completed based on weighted features, and cumulative drift is effectively eliminated. According to the method, interference of dynamic and low-credibility features is suppressed through differential feature weighting, the adaptability to an intermittent moving object is improved through a double-stage weighting mechanism, and the stability and observability of a low-texture scene are enhanced through point-line combined modeling.

The invention discloses a liquid crystal display gray scale dynamic adjustment method conforming to human eye brightness perception. The method comprises the following steps that S1, an electro-optical characteristic curve of a liquid crystal display is obtained; s2, determining an optimal gray scale voltage range of the liquid crystal display; s3, acquiring ambient light brightness in real time; s4, determining brightness distribution of the liquid crystal display; s5, determining a human eye brightness sensitivity index range; s6, dynamically adjusting the gray scale index range of the liquid crystal display; and S7, performing gray scale driving on the liquid crystal display. By determining the optimal gray scale voltage range and dynamically adjusting the gray scale index, the gray scale offset phenomenon under different visual angles can be effectively reduced, and the human eye brightness sensitivity index can be matched with the gray scale index of the liquid crystal display under the condition of different ambient light brightness and liquid crystal display brightness, so that the human eye brightness sensitivity index can be matched with the gray scale index of the liquid crystal display. And a display effect conforming to human eye brightness perception is realized.

The invention provides a nickel sheet welding visual angle control fool-proof method, and relates to the technical field of metal processing, and the method overcomes the interference of nickel sheet surface optical characteristic difference, spatial pose change and complex optical environment through gray scale adaptive processing, pose correction, included angle control and fool-proof determination, and realizes accurate positioning and poor welding interception. By means of self-adaptive gray threshold segmentation, a three-dimensional pose compensation model and Gaussian filtering edge enhancement, interference caused by nickel sheet surface roughness, workpiece inclination and ambient light changes is effectively overcome, the coarse positioning error is reduced to + / -0.2 mm from + / -0.5 mm, the fine positioning error is controlled to + / -0.05 mm, the grabbing success rate is increased to 98% or above, the welding reject ratio is remarkably reduced, and the welding quality is improved. According to the method, module scrapping is avoided, stable operation of a production line under the high-precision welding requirement is ensured, different nickel sheet materials and welding scenes are automatically adapted through the technological parameter table, the system universality is enhanced, technical support is provided for the procedures of tab cutting, battery cell stacking and the like, and the adaptability is high.

The utility model relates to a burr detection device and flaking equipment. When burr detection is carried out on a pole piece, the pole piece is firstly transferred to a deviation rectifying table; the first vision module obtains the position information of the pole piece, and the three-axis driving mechanism can drive the deviation rectifying table to rectify the deviation of the pole piece according to the position information. And after rectification is completed, the second visual module acquires image information of the edge of the pole piece. By analyzing the collected image information, whether burrs of the pole piece exceed the standard or not can be judged. Moreover, in the working process of the second visual module, the deviation rectifying table is driven by the three-axis driving mechanism to translate and rotate in the second visual module, so that all the edges of the pole piece can enter the visual angle range of the second visual module in sequence, and the second visual module can obtain the image information of all the edges of the pole piece. Therefore, the burr detection device and the flaking equipment can carry out full-area burr detection on the pole piece.

The invention discloses a method and a device for measuring the circle center of an outfitting pipe fitting with a shielded sight line, the device for measuring the circle center of the outfitting pipe fitting is designed, the device is arranged on a pipe flange of the outfitting pipe fitting, and the circle center of the pipe is guided and transferred into a measurement visual angle of a total station by using the device, so that the measurement of the circle center of the outfitting pipe fitting is realized. The three-dimensional coordinate of the target center of the measuring target on the device is measured by the total station, and then the three-dimensional coordinate of the circle center of the pipe is calculated, so that the actual position deviation of the circle center of the pipe is judged, the problems that the circle center of the pipe is shielded and cannot be measured and the total station needs to be carried back and forth are effectively solved, the measuring difficulty is reduced, and the measuring efficiency is improved.

The invention relates to the technical field of displays, in particular to a double-view-angle mini LED vehicle-mounted display device and a control method thereof. The double-view-angle mini LED vehicle-mounted display device comprises a main body frame which comprises an upper rubber shell, an inner rubber frame, a middle rubber shell and a lower frame, the middle rubber shell is connected with the lower frame in a clamped mode, the upper rubber shell is connected with the middle rubber shell in a clamped mode, and the inner rubber frame is connected with the bottom of the lower frame; the first visual angle backlight assembly comprises a first light source assembly, and the first light source assembly is arranged on one inner side wall of the lower frame; the second visual angle backlight assembly comprises a second light source assembly and a visual angle restraining piece, and the visual angle restraining piece is located on one side of the light emitting direction of the second light source assembly; the visual angle restraining part is located on the side, opposite to the light emitting direction, of the first visual angle backlight assembly. According to the invention, two different visual angles can be conveniently and rapidly switched.