79 results about "3d laser scanner" patented technology

The invention relates to the technical field of bridge engineering construction, in particular to a bridge deck concrete flatness detection and correction method, which comprises the following steps: synchronously acquiring bridge deck point cloud, elevation and crack data through a three-dimensional laser scanner, a laser profiler and an ultrasonic sensor, and fusing to generate a three-dimensional digital model; defects such as local protrusions and wave deformation are recognized based on an intelligent analysis algorithm, causes are analyzed, and correction process parameters such as milling, cladding, grouting or ultrathin layer pouring are generated in a targeted mode; operation is executed through equipment such as a finish milling machine, closed-loop control is realized by combining real-time monitoring of a laser profiler, and finally, a traceable digital file is formed through laser detection, inspection and acceptance of an unmanned aerial vehicle and data archiving. By means of the method, the pass percent of the flatness of the bridge floor can be increased to 94% or above, the maximum height difference is controlled within 3 mm, the maintenance period of the bridge is prolonged, and the maintenance cost is reduced.

The invention relates to a tunnel three-dimensional holographic splicing method and device for panoramic array camera networking, and the method comprises the steps: enabling a reference transmission camera array and a three-dimensional laser scanner on an inspection vehicle to move to different inspection positions along with the inspection vehicle for adjustment, achieving the transmission of peripheral control information at two ends of a tunnel into a measurement region, and constructing a dynamic control field; the limitation on measurement conditions is reduced; high-precision positioning and attitude determination are carried out based on fixed connection constraints of a look-around camera array and a three-dimensional laser scanner and a constructed dynamic control field, so that a measurement platform is unified to a global coordinate system, and the inherent defect of large accumulative error of a traditional three-dimensional modeling method is effectively avoided; and then the high-resolution look-around image is mapped to the three-dimensional point cloud data under the global coordinate system, so that high-resolution and high-precision three-dimensional holographic splicing of the tunnel ring surface under the global coordinate system is realized, global and local high-resolution and high-precision are achieved, and the acquisition precision of the tunnel three-dimensional hologram is greatly improved.

The invention relates to the technical field of tunnel and underground engineering construction, and discloses an intelligent closed-loop control system and method for a tunnel construction section contour, and the method comprises the steps: collecting geological-geometric data through the fusion of a three-dimensional laser scanner and a geological radar before blasting; dynamically generating a theoretical blasting contour line and adaptive blasting parameters through a convolutional neural network; iMU positioning and a PID controller are combined to realize millimeter-level accurate control of the drill boom; generating a three-dimensional deviation field by adopting an iterative point cloud registration algorithm after blasting; when the deviation exceeds a threshold value, triggering incremental learning to optimize model parameters; and finally, closed-loop iteration is formed. Through multi-source data fusion, contour and parameter intelligent generation, precise execution control, three-dimensional deviation field feedback and an incremental learning mechanism, a complete intelligent closed-loop control system is constructed, the limitation of traditional blasting design depending on experience is broken through, and the precision, efficiency and economic benefits of tunnel construction are remarkably improved.

The invention discloses a visual recognition paint spraying robot system and an operation method thereof, and relates to the technical field of automatic paint spraying, and the technical scheme is that the visual recognition paint spraying robot system comprises a robot system module which comprises a hardware module and a software module; the hardware module comprises a visual acquisition unit module, a spraying execution module, a paint supply module, a safety protection unit module and a control terminal module, and the software module comprises a visual identification subsystem module, a path planning subsystem module, a monitoring and alarm subsystem module and a safety control subsystem module. The high-precision paint spraying system has the beneficial effects that through the high-resolution industrial camera, the 3D laser scanner and an advanced visual recognition algorithm, information such as grooves, defects and sizes of workpieces can be precisely recognized, high-precision paint spraying of complex workpieces is achieved in combination with a self-adaptive path generation algorithm, the paint spraying quality and the product percent of pass are greatly improved, the production efficiency is improved, and the production cost is reduced. And the whole paint spraying process is smoother and more efficient.

The invention provides a slope excavation engineering quantity calculation system and method based on point cloud, and the method comprises the steps: reading the slope geological data of hydropower engineering to construct an initial three-dimensional model, and collecting the multi-stage point cloud data through a three-dimensional laser scanner; performing equidistant gridding on the point clouds of the model region according to an X / Y axis, calculating the spatial similarity and color similarity of the point clouds in grids, and dividing sub-data sets according to threshold values; fitting an excavation surface through a Delaunay triangulation network, calculating an XY plane projection area, and calculating an average Z-direction distance from a subset to the surface of the initial model; the node weight of the triangulation network is corrected by fusing rock stratum interface parameters, finally, the excavation engineering amount is dynamically output through summation of the product of the projection area of each subset and the average distance, and when the deviation of adjacent stages exceeds 10%, cross validation is conducted in combination with a profile method. According to the method, the precision and the real-time performance of slope excavation engineering quantity calculation can be improved, and automatic integration of lithologic characteristics and mechanical attributes is realized.

The invention provides a building point cloud intelligent completion and feature extraction method based on oblique photography, and belongs to the technical field of three-dimensional imaging and laser point cloud. The method comprises the following steps: acquiring initial point cloud scanning data of a building, wherein the initial point cloud scanning data is measured based on a three-dimensional laser scanner; performing clustering on the initial point cloud scanning data to obtain a plurality of clustered initial point cloud distribution areas; for each initial point cloud data distribution area, calculating the point cloud data missing degree of the initial point cloud data distribution area through point cloud data feature extraction; and determining a point cloud completion mode of each initial point cloud distribution area according to the plurality of point cloud data missing degrees corresponding to the plurality of initial point cloud data distribution areas. According to the invention, the corresponding targeted point cloud completion mode can be intelligently selected according to the distribution characteristics of the initial point cloud data, and the integrity and accuracy of the three-dimensional point cloud data of the building are improved.

The invention discloses a high-stacking-layer-number visual guidance system for automatic stacking after plate cutting, and relates to the technical field of plate processing automation, and the system comprises a plate information acquisition module which uses a 3D laser scanner and a high-definition industrial camera to obtain the three-dimensional contour and surface characteristics of a plate; the data processing module performs noise reduction, calibration and feature extraction; the mechanical analysis module evaluates the mechanical property and collapse risk of the stack; the intelligent planning module optimizes the stacking position and direction; the execution guide module accurately grabs and stacks and adjusts deviation in real time; according to the invention, by integrating a multi-mode sensing system, plate features are accurately collected and rapidly classified, and reliable data are provided for stacking planning; the mechanical and intelligent planning module dynamically evaluates the risk, optimizes the stacking scheme, and improves the space utilization rate and stability; meanwhile, a closed-loop control system calibrates execution actions in real time, millimeter-level precision is ensured, and adaptability to complex working conditions is greatly enhanced.

The invention belongs to the technical field of leakage detection, and particularly relates to an existing building basement side wall leakage three-dimensional detection system and method based on an intelligent wall-climbing robot. The detection system comprises an intelligent wall-climbing robot platform, a multi-modal detection sensor group, a data processing and analysis system and a user interaction terminal, wherein the multi-modal detection sensor group is carried on the intelligent wall-climbing robot platform; the intelligent wall-climbing robot platform comprises a moving adsorption system, a moving mechanism, a positioning navigation system, a posture adjusting mechanism and a communication power supply device. The multi-modal detection sensor group comprises an infrared thermal imager, a high-resolution visible light camera, a 3D laser scanner, a wall penetrating radar, a capacitive humidity sensor and an ultrasonic thickness gauge; the data processing and analysis system comprises an edge computing unit and a cloud analysis platform; the edge calculation unit is responsible for real-time data acquisition, preprocessing, sensor control and motion control. According to the existing building basement side wall leakage three-dimensional detection system and method based on the intelligent wall-climbing robot, full-thickness detection coverage from the surface layer to the deep layer, conversion from manual operation to full-automatic wall climbing and crossing from single-point detection to path tracking are achieved.

This invention relates to the field of hydropower station construction, specifically disclosing an intelligent splicing method for elbow pipes based on digital pre-assembly. The method includes: S1: Establishing an absolute coordinate measurement control network in the pre-assembly area; S2: Setting a checkerboard target for positioning on the surface of the elbow pipe block and scanning the block using a 3D laser scanner; S3: Performing multi-site point cloud splicing based on the center coordinates of the target sphere to reconstruct a complete block point cloud model; S4: Processing the complete block point cloud model using a voxel grid centroid sampling method; S5: Establishing a theoretical BIM model and placing it in the coordinate system of the control network to obtain the ideal installation posture; S6: Using an iterative nearest-point algorithm, matching the simplified block point cloud model with the theoretical model in spatial pose to obtain the final installation posture of the elbow pipe block; S7: Based on the final installation posture, calculating the theoretical installation coordinates of the checkerboard target center, generating adjustment commands, and positioning the elbow pipe block according to the commands. This method solves the technical problems of low efficiency and poor accuracy in traditional elbow pipe component assembly, as well as difficulties in segment alignment due to accumulated manufacturing errors.

1. Name of the product in this design: 3D Laser Scanner (UCL360 Nano). 2. Application of this design: This design is intended for use with a 3D laser scanner. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view.

This invention discloses a landslide deformation monitoring method based on slope radar and 3D scanning, comprising: simultaneously acquiring deformation echo signals and high-density point cloud data using slope radar and a 3D laser scanner; constructing a simplified point cloud model using a point cloud topology optimization algorithm; spatiotemporally registering the multi-source data; building a multi-field coupling analysis framework by combining a slope stress-deformation coupling model; analyzing the temporal evolution of deformation using a dynamic deformation time-series model; extracting key parameters such as deformation rate and cumulative deformation; and realizing 3D dynamic display through a deformation data visualization analysis platform. This invention, through spatiotemporal registration, multi-field coupling analysis, and time-series modeling, accurately captures deformation characteristics and abrupt change patterns, balancing monitoring accuracy and efficiency, providing comprehensive and intuitive technical support for landslide risk prevention and control, and is applicable to landslide deformation monitoring scenarios with complex slope terrain.

This invention provides a process for welding positioning ribs in a nuclear power generator, comprising the following steps: S1: Place the generator base horizontally on a platform and level it; S2: Mark the machining allowance line and hammer a punch; S3: Turn the generator base upside down, place it upright on the platform, and level it; S4: Install the positioning rib welding fixture according to the marked circular line in S2 and spot weld it in place; S5: Pull steel wires at the slots of the positioning rib welding fixtures at both ends of the generator base; S6: Weld the limiting round steel; S7: Remove the steel wires and hoist the positioning ribs in groups; S8: Adjust the positioning rib welding fixtures so that the positioning ribs are tightly attached to the limiting round steel; S9: Assemble the support blocks and spot weld them in place; S10: Use a 3D laser scanner to detect the position and dimensions of the positioning ribs and record the data; S11: Weld in sequence, and perform flat welding on all welds; S12: Grind the welds and perform 100% flaw detection. S13: Remove the positioning rib welding fixture, and finally use a 3D laser scanner to detect the position and size of the positioning rib, and record it for future reference.

This application relates to a method, apparatus, and computer equipment for rapid determination of cavitation damage in a turbine runner. The method includes: acquiring point cloud data collected by a 3D laser scanner on the surface of the turbine runner; determining the cavitation erosion region based on the geometric features of the point cloud data; determining the cavitation damage area, cavitation damage depth, and cavitation damage volume based on the point cloud data corresponding to the cavitation erosion region; and determining the cavitation damage measurement result of the turbine runner based on the cavitation erosion region, cavitation damage area, cavitation damage depth, and cavitation damage volume. This method leverages the high precision and anti-interference characteristics of the 3D laser scanner to identify cavitation erosion areas using the collected point cloud data, calculate the area, depth, and volume of the cavitation erosion region, and generate accurate cavitation damage measurement results for the turbine runner. This avoids the limitations imposed by the detection environment and operating conditions on cavitation damage detection, achieving efficient cavitation damage detection and thus improving the safety of hydroelectric equipment.

A support frame for 3D laser scanner measurement includes: a base, fixed legs, a fixed pan / tilt head, a first height fine-tuning unit, and a second height fine-tuning unit. The 3D laser scanner is mounted on top of the base, and the fixed legs are pivotally connected to the bottom of the base. The fixed legs are positioned on the ground. The fixed pan / tilt head is positioned between the base and the 3D laser scanner. The first height fine-tuning unit is located below the fixed pan / tilt head, extending from the top to the bottom of the base. The second height fine-tuning unit is located inside the first height fine-tuning unit, extending from the top of the fixed pan / tilt head to the bottom of the first height fine-tuning unit. This invention solves the technical problem of the limited vertical field of view of the 3D laser scanner, resulting in a scanning blind zone near the bottom of the support frame, and avoids the technical problem of the fixed legs of the support frame swinging after being brought together, leading to damage to the fixed legs.

The application discloses a train wheel defect detection method based on three-dimensional information, which comprises data acquisition, data preprocessing, laser line extraction, laser coordinate transformation, three-dimensional wheel splicing and defect detection. The application adopts the combination of multiple linear array cameras and 3D laser scanner modules to generate multiple two-dimensional image data and laser scanning data with depth information, extracts wheel laser center line data through a complex image processing algorithm, reconstructs the three-dimensional profile of the wheel with depth information, splices the three-dimensional information of the complete wheel, compares the local depth information, finds out the area with large depth change, finally detects the defects of the tread and the rim surface of the complete wheel, obtains the information such as the area, position and depth of the defect area, and dynamically generates a detection report for the customer to review and repair in time.

This provides a method for predicting acid-etched wall morphology based on a mathematical model. [Solution] The method involves using a 3D laser scanner and fluid finite element software to perform 3D modeling on the rock slab fracture surface, obtaining a fracture space model, and then, based on the fracture space model, coupling the pressure field and velocity field of the fracture space model to obtain a solution, thereby obtaining the fluid dynamics parameter distribution within the fracture, inputting this fluid dynamics parameter distribution into a constructed acid-rock reaction mathematical model, obtaining the erosion mass of each wall node, using the erosion mass of each wall node to obtain the erosion depth corresponding to the wall, and then, using the fracture space model, removing the influence of the erosion depth corresponding to the wall to obtain the wall morphology after acid etching, thereby completing the prediction of the acid-etched wall morphology.

The invention discloses a weld defect phased array detection fusion method, and belongs to the technical field of nondestructive detection. The method specifically comprises the following steps: S1, continuously scanning a current welding seam through a 3D laser scanner to obtain 3D point cloud data about the welding seam, and scanning the surface of the welding seam through an industrial camera to obtain surface image data about the welding seam, performing multi-modal data fusion on the 3D point cloud data surface image data of the welding seam to obtain a first fusion data model about the welding seam, and dividing the first fusion data model into a plurality of areas; and S2, matching the first fusion data model and the welding seam parameters with the welding seam historical record data, and judging the defect possibility of each region of the current welding seam according to a matching result to plan a scanning strategy. The automatic detection process reduces manual participation, is especially suitable for welding seam detection under high-altitude, low-temperature or dangerous working conditions, reduces personnel safety risks, and makes up for the defect that traditional phased array detection lacks surface geometric measurement capability.

This invention discloses an image recognition and correction system based on an optical model and environmental perception, belonging to the field of image processing technology. The system includes an environmental perception module: This module acquires multi-medium refractive index, interface 3D morphology, and initial image data through a refractive index sensor, a 3D laser scanner, and a vision camera. This data is then dynamically corrected and fused from multiple sources to form an environmental perception dataset. The invention constructs an optical model based on the environmental perception data and combines it with an interference compensation sub-model to calculate the light propagation path. This interference compensation sub-model can quantify the interference effects of impurities, temperature gradients, and other interference factors in the medium by analyzing relevant data acquired by the environmental perception module, generating compensation terms that are integrated into the light propagation equation. This corrects the light propagation path, ensuring the accuracy of the light propagation path calculation and providing solid and reliable data support for subsequent image recognition and correction, thus improving the accuracy and quality of image recognition and correction.

This invention discloses a method for identifying and analyzing the structural surfaces of rock masses based on handheld laser scanning, belonging to the field of rock mass stability analysis. The method includes the following steps: S1, scanning the surface of the rock mass under test using a handheld 3D laser scanner to form a complete 3D triangular mesh surface model of the rock mass surface; S2, segmenting multiple candidate planar pieces; S3, grouping and iteratively merging the candidate planar pieces to obtain structural surface groups belonging to the same structural surface; S4, acquiring structured data files; S5, identifying key movable blocks under free-face conditions of the rock mass; S6, estimating the preliminary stability coefficients of the key movable blocks; S7, generating a numerical calculation model using the continuous-discontinuous element method containing explicit joint networks; S8, assigning mechanical parameters; S9, numerically solving the problem to obtain the stress, displacement, and potential failure mode analysis results of the rock mass; S10, dynamically updating. Using the above-mentioned method for identifying and analyzing the structural surfaces of rock masses based on handheld laser scanning, an integrated rock mass stability analysis system is constructed that balances engineering assessment efficiency and analytical accuracy while significantly reducing subjective errors.

A method performed by a three-dimensional (3D) laser scanner is provided. The method includes positioning the 3D laser scanner at a first position. First 3D data is acquired by rotating the 3D laser scanner at the first position. A characteristic of the environment is determined with a camera on the 3D laser scanner. At least one weighted parameter of a SLAM methodology is adjusted based on the characteristic. The 3D laser scanner is moved from the first position to a second position based on the SLAM methodology. A pose of the 3D laser scanner is tracked as the 3D laser scanner is moved from the first position to the second position. A second 3D data is acquired at the second position by rotating the 3D laser scanner at the second position. The second 3D data is registered with the first 3D data based on the tracking.

This utility model discloses an auxiliary disk for collecting measurement control points in metal mines, belonging to the field of metal mine measurement and scanning technology. It includes a base with measurement control point holes on the upper part and fixing holes and bolts on the lower part. This utility model aligns the handle of a handheld 3D laser scanner with the auxiliary disk, uses the fixing bolts to secure it to the handheld 3D laser scanner handle through the fixing holes on the lower part of the base, and aligns the measurement control point holes on the upper part of the base with the metal mine measurement control points. This enables the handheld 3D laser scanner to directly, quickly, and accurately collect the 3D coordinate data of the metal mine measurement control points.

The application relates to the technical field of engineering geology exploration, and discloses a 3D scanning core characteristic parameter identification system and method, which comprises a core storage module and a 3D scanning module; the method comprises the following steps: separating complete and fragmented cores by self-adaptive cleaning and separation of drilling core samples, forming a space-attribute binding initial data set; dynamically adjusting the height and levelness of a 3D laser scanner by an automatic numerical control platform, generating an optimal scanning path topology network covering all core boxes; the scanning path topology network feeds back point cloud coverage in real time, dynamically adjusts the rotation angle, and outputs a full-angle high-density core point cloud sequence; the full-angle high-density core point cloud sequence is fused by multi-scale features, and an automatic columnar chart, a quantitative parameter set and a joint parameter package are generated. Through automatic and high-precision scanning and data analysis, the application realizes digitalized collection of cores and accurate calculation of geological parameters, and improves the efficiency and quality of geological exploration.

A detection and marking integrated platform for workpiece cutting comprises a working platform, a pneumatic positioning clamp and a vertical baffle are arranged on the working platform, and a vacuum suction cup mechanical arm is installed on the vertical baffle. A multi-modal detection device is further arranged on the working platform, and the multi-modal detection device comprises a supporting column, a detection module and a multifunctional display screen; the vacuum chuck manipulator comprises a multi-axis mechanical arm and a vacuum chuck; and a three-color LED prompting lamp is further included. The pneumatic positioning clamp is arranged and used for fixing the workpiece, so that the workpiece is prevented from deviating in the detection process; a vacuum chuck manipulator capable of automatically turning over is arranged, so that the omnibearing detection of the workpiece is realized; the 3D laser scanner and the high-resolution industrial camera are used for carrying out multi-modal detection on cutting precision and surface burrs of a workpiece, errors caused by manual visual inspection are avoided, workpiece detection data are displayed on the multifunctional display screen, unqualified data are marked, and detection data reference is provided for subsequent reworking.

This invention discloses a method for assessing tunnel lining defects based on multi-source data and data-physical fusion experiments. The method includes front-end multi-source data acquisition, numerical analysis and prediction of defect development, and physical testing machine-based reconstruction and prediction of defect conditions. This invention acquires multi-source data on tunnel lining defects and structural degradation using a linear array camera, laser vibrometer, and 3D laser scanner. The acquired data is processed and analyzed, and the development tendency of the main defects controlling lining damage is predicted based on the TCI circle. A tunnel lining-defect model is constructed based on the original tunnel lining operating conditions and the acquired defect information. A dynamic-static load lining pressure testing machine is used to simulate tunnel surrounding rock pressure, seismic loads, and traffic loads. Pressure tests are conducted on the lining-defect model to verify the development tendency of the main defects. The physical experimental results can be mapped to the actual defect development situation in the engineering field, providing a reference for the safe operation and maintenance of tunnel linings and disaster prevention and control.

This invention discloses a method for installing electromechanical pipelines based on BIM and 3D laser-assisted installation. A BIM model is constructed based on the original civil engineering construction drawings to form a BIM of the building's civil engineering structure. A 3D laser scanner is then used to scan the civil engineering structure to obtain its calibration parameters. These parameters are used to adjust the original BIM model to match the actual condition of the completed civil engineering structure. Furthermore, based on the original pipeline installation drawings, pipeline installation is simulated in the optimized BIM model, simulating the installation process and effects. Based on the installation process and effects, the pipeline installation drawings are optimized to form optimized pipeline installation drawings. Pipeline installation is then performed based on these drawings, thereby assisting in the completion of electromechanical pipeline installation. This method can be adjusted according to the actual civil engineering structure, greatly improving project efficiency and reducing resource waste caused by rework.

The utility model belongs to the technical field of scanning inspection, and particularly discloses a rotary scanning platform tool for a handheld three-dimensional laser scanner, which comprises a working platform and a rotary base arranged below the working platform. The working platform comprises a storage table, handles and reflective sticking points, the handles are arranged on the side edge of the storage table, the reflective sticking points are arranged on the front face of the storage table, and the number of the handles and the number of the reflective sticking points are respectively multiple. The object placing table is used for placing a to-be-scanned product, the reflective sticking points play a role in reflecting light so as to be matched with the handheld three-dimensional laser scanner to carry out scanning operation, and the handle can be convenient for a worker to rotate the object placing table; the rotating base comprises an outer circular ring, an inner circular ring, a plurality of silencing strips and a plurality of steel balls, the inner circular ring and the outer circular ring are concentrically arranged, the silencing strips and the steel balls are arranged between the inner circular ring and the outer circular ring, the silencing strips and the steel balls are arranged in a staggered manner, and a plurality of anti-falling foot pads are arranged above the inner circular ring.

This invention proposes an automated stacking control system for adjusting the rotation angle of containers, applied to gantry cranes. The system includes a first marker, a second marker, a third marker, a fourth marker, a first 3D laser scanner, a second 3D laser scanner, a first 2D laser scanner, a second 2D laser scanner, a programmable controller, and a data processing platform. The programmable controller is electrically connected to the first 3D laser scanner, the second 3D laser scanner, the first 2D laser scanner, and the second 2D laser scanner, and is also communicatively connected to the data processing platform. This invention further proposes an automated stacking control method for adjusting the rotation angle of containers, including: triggering a detection task; obtaining the deviation; deriving compensation parameters; and controlling the spreader to move left and right, rotate left and right, and move the trolley forward and backward according to the compensation parameters to eliminate the deviation. This invention improves the accuracy, safety, operational efficiency, and stacking neatness of the automated stacking control for adjusting the rotation angle of containers.

This application relates to the field of surveying equipment, specifically disclosing a portable 3D laser scanner, which includes a measuring mechanism and a housing. The housing has a mounting slot for placing the measuring mechanism, and the outer bottom wall of the housing has multiple supports and grooves for accommodating the supports. A base plate is fixedly mounted inside the housing, and a rotating disk is rotatably mounted on the base plate. Multiple guide grooves are formed on the rotating disk, and clamping columns are slidably mounted in the guide grooves. An upper clamping plate is fixedly connected to the clamping column. A support tray for supporting the measuring mechanism is raised and lowered on the rotating disk. A clamping mechanism is also provided on the rotating disk to drive the clamping columns along the guide grooves toward the center of the rotating disk as the support tray moves downwards, causing the upper clamping plate to clamp the measuring mechanism. This application offers good portability, and the 3D measuring instrument body is easy to assemble and disassemble, and exhibits high stability after installation.

The invention discloses a motion detection method for an underwater building structure, and provides the following scheme aiming at the problem of inconvenient manual detection in the prior art: the motion detection method comprises the following steps: S1, cleaning a building by using a cleaning handle, and removing attachments adhered to the underwater of a wharf; s2, a plurality of marker groups are fixed to the surface of the underwater building structure, and each marker group is composed of a plurality of mark points arranged in an array; s3, performing visual capture on the same building structure from different directions by adopting a plurality of visual capture devices, detecting different parts and different types of damages of a wharf by adopting different carriers and technologies, and performing large-range scanning by adopting an aerial detection module carrying a 3D laser scanner for overall deformation and deviation of an overwater structure part, obtaining point cloud data; an aerial module is adopted to carry a high-definition camera to carry out close-range imaging on a water panel structure crack part.

This utility model relates to the field of 3D laser scanner technology, specifically a high-precision scanning head structure for a 3D laser scanner. It includes a handle with high-precision scanning ends at both ends. A stepper motor is fixed to one side of the handle near both ends, containing a lead screw body. The handle has a hollow area, with a connecting block at one end of the lead screw body and a connecting seat fixed to one end. A hinge seat is located at one end of the high-precision scanning end. Connecting plates one and two are located on either side of the hinge seat and the connecting seat. The high-precision scanning end and the handle are hinged together. This utility model solves the problem that in existing handheld 3D laser scanners, the high-precision scanning ends at both ends of the handle are generally fixed to the handle. During scanning, if the object being measured has obstructions, complete 3D data may not be obtained. Furthermore, scanning data may be inaccurate or incomplete for transparent, reflective, or light-absorbing surfaces, making it inconvenient to scan larger workpieces.