67 results about "Laser plane" patented technology

The invention discloses a submarine topography reconstruction system and method based on optical mobile measuring and scanning, and relates to the technical field of ocean exploration, and the system comprises the following units: an image collection unit, which is used for coordinating the emission of 532nm pulse laser and the collection of a gating camera image through a synchronous sequential circuit, a triangulation measurement optical structure with separated emission and reception is adopted, and a submersible can be carried for mobile measurement and scanning; the system calibration unit is used for carrying out joint calibration on camera parameters and a laser plane so as to determine system calibration parameters, so that the spatial position of a laser stripe accurately corresponds to the actual coordinate of the target surface; and the image processing unit is used for preprocessing the image acquired by the system and further extracting the coordinates of the center line of the laser stripe in the preprocessed image. According to the invention, adjacent splicing can be carried out through continuously collected laser stripe images to construct two-dimensional submarine landform information, and three-dimensional reconstruction of submarine topography can be carried out by using generated point cloud data.

The invention provides a calibration control method and system for laser scanning equipment and electronic equipment, and relates to the field of laser scanning equipment calibration, in the method, a special calibration block comprising a protruding part is used for calibrating the laser scanning equipment, calibration of external parameters can be completed only through one-time collection, and the operation process is simplified; according to the method, the calibration control process is achieved through the intersection points between the characteristic lines of the calibration block and the laser plane of the laser scanning equipment, the length of the direction of the characteristic lines is not required, only the laser stripes need to cover the multiple characteristic lines, and the calibration precision is improved.

The invention discloses a laser welding seam on-line detection method and device and a laser welding device.The detection method comprises the steps that after laser welding is completed, a laser plane is projected to the surface of a welding seam, modulated laser stripes are formed, and a laser stripe image is collected; a Gaussian fitting method is adopted to extract sub-pixel coordinates of the centers of all columns of stripes in the laser stripe image, and a center line of the section contour of the welding seam is generated; identifying feature endpoints on the center line; based on the feature endpoints and the center lines, the convexity and the concavity of the surface of the weld joint are calculated; and judging whether the weld quality is qualified or not according to the convexity and the concavity of the weld surface. The method detects the surface characteristics of the post-welding weld through a light vision method, can directly detect the size and shape of a molten pool on the surface of the weld, surface pores and other defects, and has the obvious advantages of rapidness, real-time performance, high detection precision and the like.

An ice leveling system involves a laser receiver mountable on an ice conditioning head of an ice resurfacing machine below a top-most portion of the ice resurfacing machine and at least two laser projectors that project laser light in a plane below a level of the top-most portion of the ice resurfacing machine. The at least two laser projectors are mountable adjacent to an ice surface and are positionable around the ice surface so that the laser receiver when mounted on the ice resurfacing machine always receives the laser light from at least one of the at least two laser projectors during an ice leveling operation. At least one of the at least two laser projectors is height adjustable to align the laser light plane projected by the height adjustable laser projector with the laser light plane of others of the at least two laser projectors.

1. The name of the design product: ultraviolet internal engraving machine. 2. The use of the design product: for laser plane, 2.5D, 3D marking, relief and internal engraving. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The present application belongs to the technical field of road engineering detection, and discloses a pavement rut three-dimensional model reconstruction method and system. The method comprises the following steps: acquiring vehicle speed, GPS stake number, vehicle three-axis acceleration data, environmental brightness value and deformation light strip image in real time; extracting pixels from the deformation light strip image to obtain pixel coordinate data representing laser line positions; performing triangular calculation on the pixel coordinate data by using a preset camera internal parameter matrix and distortion coefficient and a preset laser plane equation to obtain cross section coordinate data; compensating errors in the cross section coordinate data caused by vehicle vibration by using the vehicle three-axis acceleration data to obtain compensated cross section data; and associating corresponding road mileage positions for each frame of data in the compensated cross section data based on vehicle speed and GPS stake number to generate cross section data with mileage. The method has the advantages of high detection efficiency, low cost, safe operation, continuous and non-missing data and high reconstruction precision.

The application provides a 3D printer and a working method of a laser profiler. The 3D printer is provided with a calibration plate. Before a target object is scanned by the laser profiler, the print head and / or the print bed of the 3D printer can be moved, so that the laser profiler has different distances with the print bed. The camera and the laser emitter of the laser profiler controlled under different distances respectively shoot laser images with laser lines and calibration images without laser lines. Then, based on the calibration images and the laser images under different distances, the laser plane parameters of the laser profiler are calculated, so that the calibration of the laser profiler is realized in the 3D printer. When the calibration parameters of the laser profiler change due to vibration or other reasons, the laser profiler of the 3D printer can be recalibrated, so that the scanning precision of the laser profiler is ensured, and the precision of the 3D printer is ensured.

The invention relates to the technical field of machine vision and three-dimensional measurement, and discloses a laser plane calibration method based on a binocular single line, and the method comprises the steps: obtaining an initial laser plane equation; rotating a known angle theta to obtain a new laser plane; acquiring an actual intersection point coordinate set of the new laser plane and the calibration plane; obtaining a theoretical intersection point coordinate set of the theoretical new laser plane and the calibration plane; combining the theoretical new laser plane, the actual intersection point coordinate set and the theoretical intersection point coordinate set, and optimizing the new laser plane equation by adopting nonlinear optimization to obtain an optimized new laser plane equation; and driving the laser transmitter to rotate around the rotating shaft of the motor by an angle theta through the motor until the laser transmitter passes through all the transmitting positions, and fitting laser planes of all the transmitting positions.

The application discloses a laser measuring device for touch control assembly plane detection, which comprises a fixing seat and a filter box, a touch control seat is movably connected to the inside of the fixing seat, a rotating assembly is arranged on the outside of the fixing seat, movable assemblies are arranged on the two sides of the rotating assembly, and the application relates to the field of laser plane measurement. The inside of the fixing seat is movably connected with the touch control seat, the outside of the fixing seat is provided with the rotating assembly, the two sides of the rotating assembly are provided with the movable assemblies, one side of the movable assembly is movably connected with a laser detection sensor, the outside of the fixing seat is fixedly provided with a detection grating and a positioning point, therefore, multiple laser detection sensors emit laser to the same touch control seat through the gaps between the detection gratings, the height of the point on the touch control is calculated by the height of the laser penetration sensed by the grating, and the flatness of the touch control in the touch control seat is measured.

The utility model discloses a frame product flatness repairing device which comprises a base, a placing table is installed on the base, first moving grooves are symmetrically formed in the two sides of the base in the length direction of the base, length positioning assemblies are installed in the two first moving grooves, second moving grooves are symmetrically formed in the two sides of the base in the width direction of the base, and the length positioning assemblies are installed in the second moving grooves. Width positioning assemblies are mounted in the two second moving grooves, a support is mounted on the base, a first moving assembly is mounted on the upper portion of the support, a second moving assembly is mounted on the first moving assembly, a mounting plate is mounted at the bottom of the second moving assembly, and a laser flatness measuring instrument is mounted on one side of the bottom of the mounting plate; a telescopic piece is installed on the other side of the bottom of the installation plate, and a flattening head is installed at the telescopic end of the telescopic piece. According to the utility model, through the processes of automatic detection, automatic pressing and secondary automatic detection on the flatness of a frame product, the labor intensity of workers is reduced, and the detection efficiency is improved.

The invention discloses a method for cooperatively detecting the curvature radius and the surface shape error of a toroidal optical element. The method comprises the following steps: S1, determining the position of a CGH compensator relative to a laser plane wave interferometer; s2, determining the position of the ring surface optical element and acquiring curvature radius data; and S3, performing zero position measurement to obtain surface shape error data of the optical surface of the ring surface optical element. The method for cooperatively detecting the curvature radius and the surface shape error of the toroidal optical element has the advantages of being few in steps, ingenious in design, capable of cooperatively detecting the curvature radius and the surface shape error of the toroidal optical element and the like.

The invention belongs to the technical field of laser processing, and relates to a speed control method and related equipment applied to special-shaped plate processing, and the method comprises the following steps: in a laser plane processing operation process, collecting current height data of a laser processing nozzle in real time; calculating a height error according to the current height data and a preset height of the preset processing path; calling an initial follow-up control algorithm, and performing gain parameter optimization processing on an original gain parameter of the follow-up control algorithm according to the adaptive adjustment function to obtain a target follow-up control algorithm; calculating control parameters of the laser processing nozzle according to a target follow-up control algorithm and the height error; performing speed optimization operation on the speed of the laser processing nozzle according to the control parameters to obtain a target processing speed; and controlling the laser processing nozzle to perform laser plane processing operation according to the target processing speed. The special-shaped plate machining quality can be greatly improved.

The present invention relates to the technical field of petrochemical apparatus manufacturing, and specifically relates to a tube-tube sheet joint low-stress welding method, comprising a pre-positioning step, a partitioning step, a heating step, a stress measurement and control step, a welding step and a heat removal step. By dividing a joint area to be welded into a plurality of welding areas, a plurality of heat exchange tubes of each welding area are simultaneously subjected to temperature control, such that the number of lines is small, thus reducing the likelihood of confusion and facilitating operation; a laser flatness measurement instrument provided beside a second tube sheet is used to measure the flatness of the outer side surface of the second tube sheet, so as to indirectly feed back the amounts of thermal elongation of the heat exchange tubes of each welding area, and there is no need to install linear displacement sensors on the side walls of the heat exchange tubes as in the prior art, thereby avoiding the problem of high installation difficulty of elongation measurement devices, and achieving relatively simple disassembly and assembly; electronic components such as the laser flatness measurement instrument are separated from the heat exchange tubes, such that the impact of the high temperature of the heat exchange tubes on the measurement precision of the electronic components is avoided, thus prolonging the service life thereof, and saving costs.

A 2D area array camera-line laser 3D sensor joint calibration method, comprising: establishing a 3D coordinate system of the line laser 3D sensor, and obtaining 3D coordinates of a light bar point on the 2D area array camera; placing a target at a common measurement position, and allowing the 2D area array camera to acquire images of intersection lines of three sets of laser plane and cylinders and the image coordinates of three sets of laser light bars respectively; calculating 3D coordinates of the light bar point in a 2D area array camera coordinate system, and calculating three ellipse center position coordinates; directly acquiring 3D coordinates of three sets of laser light bars in the 3D sensor coordinate system from the line laser 3D sensor, and calculating three ellipse center position coordinates; and calculating a conversion distance between two coordinate systems.

The application discloses a seabed topography and geomorphology reconstruction system and method based on optical mobile scanning, and relates to the technical field of ocean exploration. The system comprises the following units: an image acquisition unit, which is used for coordinating the emission of a 532nm pulsed laser and the acquisition of a gated camera image through a synchronous timing circuit, and adopting a triangulation optical structure with separated emission and reception, and can be carried on a submersible for mobile scanning; a system calibration unit, which is used for jointly calibrating camera parameters and a laser plane, so as to determine system calibration parameters, and make the spatial position of a laser stripe accurately correspond to the actual coordinates of a target surface; and an image processing unit, which is used for pre-processing images acquired by the system, and further extracting the center line coordinates of a laser stripe in the pre-processed images. The application can not only perform adjacent splicing through continuously acquired laser stripe images, and construct two-dimensional geomorphology information of the seabed, but also perform three-dimensional reconstruction of seabed topography by using generated point cloud data.

The invention discloses a curved surface normal measurement method and system based on monocular vision and multiple laser planes. The method comprises the following steps: calibrating laser planes generated by a monocular camera and at least two laser plane projection units; collecting an image of a laser strip formed by the laser plane on the surface of the workpiece through a monocular camera; processing the image, and extracting a central pixel position of each laser strip to obtain a pixel point sequence; back-projecting the pixel point sequence into a three-dimensional ray in a camera coordinate system based on camera model parameters; and performing intersection operation on the three-dimensional rays and the equations of the corresponding laser planes to obtain a plurality of space intersection point sets, establishing a local curved surface model of the workpiece surface, calculating and outputting the normal direction of the workpiece surface according to the local curved surface model, and converting the normal direction into a reference coordinate system for unified representation. According to the method, the stability and universality of normal estimation are improved, the structure of a measurement system is simplified, and the adaptive capacity in the fields of robot machining, automatic detection and industrial measurement is improved.

The invention discloses a workpiece attitude error compensation method and system based on a space angle and a TCSTRANS. According to the method, automatic sensing, seamless compensation and efficient machining of workpiece attitudes are achieved through the synergistic effect of three core technologies including automatic fitting of a space angle aligned by a laser plane, workpiece coordinate system correction of kernel translation and TCSTRANS characteristic coordinate system transformation supporting five-axis RTCP programming. An original machining program does not need to be modified, the operation complexity and the technical threshold are reduced, the machining precision, efficiency and process reliability are greatly improved, the method is particularly suitable for machining of a five-axis numerical control machine tool on precise workpieces, and the problems that in the prior art, manual experience is relied on, program management is disordered, and post-processing is complex are solved.

The invention provides a line structure light laser surface modeling method and a line structure light calibration method, and the line structure light calibration method comprises the following steps: (1.1) collecting data of a calibration laser surface; (1.2) calculating a point cloud center and a covariance matrix based on the collected point cloud data; (1.3) establishing a laser surface coordinate system on the cross section of the laser surface; and step (1.4), converting all point cloud data from a camera system to a laser coordinate system, and fitting a curvilinear equation.

This utility model relates to the field of laser cutting machine worktables, and discloses a worktable for a laser flat cutting machine, including a worktable body with a blade on its upper surface, and a support and limiting structure on the worktable body to allow two longitudinally stacked worktable bodies to be stacked at a preset distance. When the support and limiting structure in the laser flat cutting machine worktable is active, it can restrict the relative movement of adjacent worktable bodies and also form a preset distance between longitudinally adjacent worktable bodies. The blade on the lower worktable body is within the preset distance and does not come into contact with the upper worktable body, thus protecting the blade from damage. When the worktable body is installed on the machine bed, the support and limiting structure is housed on the worktable body and does not affect the installation and subsequent use of the worktable body.

The invention belongs to the technical field of laser plane processing, and relates to an intermittent cutting method in processing, which comprises the following steps of: recording processing data of an interpolation track section in real time, and determining breakpoint data according to the processing data when the processing is interrupted; calculating corresponding breakpoint positioning information on the current interpolation track based on the breakpoint data; calculating breakpoint processing information on the current processing track according to the breakpoint positioning information; constructing a breakpoint row residual track based on the breakpoint processing information; and executing continuous cutting operation according to the remaining trajectory of the breakpoint row. The invention further provides an intermittent cutting device in machining, machining equipment and a storage medium. According to the invention, accurate breakpoint recovery can be realized.

The invention provides a plane calibration method for cross-structured light, which is used for solving the technical problem that when the cross-structured light is used as a light source for shooting, laser stripes contained in a shot image belong to two laser planes, so that a matching error is generated when straight line fitting is carried out in a laser plane calibration process. According to the plane calibration method for the cross-structured light, the laser line image is divided into the laser stripe and the background, then the laser stripe center line is extracted from each divided laser line image through the image refinement algorithm, and accurate extraction of the laser stripe center line is achieved; and then a classification criterion is constructed based on a principal component analysis method of K nearest neighbor and normal vector consistency, so that whether the laser point on the center line of the laser stripe belongs to the first laser plane or the second laser plane can be quickly and accurately judged, and the problem of point cloud attribution ambiguity of the biplanar laser line is successfully solved. And accurate solving and calibration of cross laser plane parameters are realized.

The utility model relates to injection mold detection technical field, concretely is a kind of injection mold flatness detection mechanism, it includes: table body, including detection platform, the surface of the detection platform is provided with laser plane detector;Positioning mechanism, including connecting groove, the connecting groove is fixedly connected in the surface of detection platform, the surface of the connecting groove is fixedly connected with protective box.The utility model can be positioned clamping by the connection of detection platform and connecting groove, can be placed in the surface of detection platform to injection mold and be positioned clamping, can start drive motor drive clockwise screw rod rotation, can make clockwise screw rod and counterclockwise screw rod synchronous rotation, can make the rotation of two groups of clamping plates with the rotation of clockwise screw rod and counterclockwise screw rod and reciprocate, to clamp and position injection mold, again through the connection of clamping plate and buffer pad, avoid the deformation caused by rigid clamping of clamping plate to mould, reach the effect that injection mold can be positioned.

The application provides a cross structured light plane calibration method, which is used to solve the technical problem that when cross structured light is used as a light source for shooting, the laser stripe contained in the shot image belongs to two laser planes, which causes matching error in the process of laser plane calibration. The cross structured light plane calibration method of the application first divides the laser line image into two parts of laser stripe and background, then extracts the laser stripe center line on each segmented laser line image by using an image thinning algorithm, so that the accurate extraction of the laser stripe center line is realized; and then based on the principal component analysis method of K nearest neighbors and the normal vector consistency, a classification criterion is constructed, which can quickly and accurately determine whether the laser point on the laser stripe center line belongs to the first laser plane or the second laser plane, successfully solves the point cloud belonging ambiguity problem of the double-plane laser line, and realizes the accurate solution and calibration of the cross laser plane parameters.

A laser level (100) comprises a housing (10), a laser generator (20) located in the housing (10) and capable of generating a lower plumb light beam (S1) and / or a laser plane containing the lower plumb light beam (S1) emitted outside the housing (10), a base (30) pivotally assembled to the housing (10) and having an attachment portion (301) for external mounting, the housing (10) has a lower opening (101a) for the lower plumb light beam (S1) and / or the laser plane to emit and forms a clearance space (40) below the lower opening (101a) and above a bottom surface (102), and the base (30) is rotatable relative to the housing (10) between a first position and a second position, when the base (30) is located at the first position, the attachment portion (301) is placed in the clearance space (40). The clearance space (40) below the lower opening (101a) is used as a receiving area of the attachment portion (301), which makes use of the design space of the existing laser level, has a compact structure, is convenient for transportation and is not easy to be damaged.

The application belongs to the technical field of line laser three-dimensional measurement, and particularly discloses a galvanometer rotating shaft calibration method and system for rotary line laser scanning three-dimensional measurement, which comprises the following steps: laser emitted by a line laser is directly incident on a three-dimensional calibration plate, an auxiliary camera is used to collect incident laser stripes to obtain an incident laser plane under the auxiliary camera measurement coordinate system; the laser emitted by the line laser is reflected to the three-dimensional calibration plate through a galvanometer, the galvanometer is controlled to rotate at multiple angles, a main camera is used to collect reflected laser stripes to obtain a reflected laser plane under the main camera measurement coordinate system; the incident laser plane is converted to the main camera measurement coordinate system based on the relative pose relationship between the auxiliary camera and the main camera; and then the galvanometer mirror surface equation corresponding to different galvanometer rotating angles is calculated to determine the galvanometer rotating shaft line. The application can compensate for the system error of the installation error of the line laser incident position and the relative rotating shaft offset of the galvanometer mirror surface, and improve the galvanometer rotating shaft calibration precision.

Analyte sensors are being increasingly employed for monitoring various analytes in vivo. Analyte sensors may feature enhancements to address signals obtained from interferent species. Some analyte sensors may comprise an analyte sensor comprising a working electrode comprising an active area disposed thereon and electrode asperities laser planed therefrom, the active area comprising an analyte-responsive enzyme. Methods include laser singulating a working electrode, the working electrode comprising an active area disposed thereupon and electrode asperities, the active area comprising an analyte-responsive enzyme, and laser planing at least a portion of the electrode asperities.

The application discloses a crystal growth interface three-dimensional morphology and rate in-situ monitoring system and method based on dynamic laser plane scanning, and relates to the technical field of crystal growth. The method comprises the following steps: establishing a mapping relationship between an image pixel coordinate and an actual space size; projecting a scanning laser pattern, and synchronously collecting a laser pattern image reflected or scattered by the interface and geometrically deformed due to height change to obtain an image sequence; reconstructing a three-dimensional morphology model of the solid-liquid interface; quantitatively judging a concave-convex state of the interface; and calculating a pushing distance of the solid-liquid interface and a corresponding crystal growth rate. The application realizes real-time and digital observation on the whole region and three-dimensional shape of the crystal growth interface for the first time. The application systematically solves the core technical blank of "inability to realize full-field, three-dimensional, dynamic and quantitative in-situ monitoring" in the prior art, and provides an effective tool for optimizing a crystal growth process and improving crystal quality and consistency.

The utility model relates to a material receiving trolley of a laser plane cutting machine, which relates to the field of material receiving devices, and comprises a trolley main body and bottom rollers for the trolley main body to roll and slide, a through hole is formed in the bottom face of the material receiving cavity of the trolley body in a penetrating mode, a mounting cover covering the through hole is arranged above the through hole, the mounting cover is provided with a mounting cavity with an opening in the lower end, and the bottom idler wheels penetrate through the through hole to the mounting cavity and are connected to the mounting cover. The trolley main body is slidably provided with a meshing push rod which is meshed with the rotating teeth and is used for driving the bottom rollers to steer; the meshing push rod penetrates through the mounting cover. The bottom idler wheels are installed in an embedded mode, only one part of each bottom idler wheel extends out of the bottom of the trolley body to be used for rolling, the space can be fully utilized under the condition that the overall height of the trolley body is not changed, a large-volume material receiving cavity is formed to be used for receiving materials, and the material receiving efficiency is high.

The application discloses a large-landscape-depth high-precision microscopic three-dimensional appearance scanning method and system and application. The method comprises the following steps: 1) establishing an imaging model based on the intersection imaging principle; 2) obtaining the depth direction information and the information of the object surface size of two dimensions of the collected image according to the imaging model, and deducing the conversion equation of the image surface and the object surface; 3) calibrating the parameters in the system object-image relationship equation through experiments; 4) scanning the object by using a line laser, calculating the spatial position coordinates of the sampling points through the calibration results, and completing three-dimensional reconstruction. The system comprises an illumination unit, an imaging unit, a displacement unit and an information control unit; the imaging plane of the imaging unit is inclined, and the line laser plane and the lens plane intersect at a straight line, so that the line laser plane is clearly imaged. The application has high efficiency and high precision, and has application value in the fields of automatic processing and part surface detection.

The application relates to the field of detection, in particular to a bridge arc-shaped steel formwork flatness detection device and a detection method. The device comprises a positioning frame for supporting and positioning a steel formwork, and further comprises a detection frame for fixing a detection mechanism. The detection mechanism comprises a group of linear telescopic units. One end of the linear telescopic unit is rotationally matched with the detection frame, and the rotation axis is parallel to the axis of the steel formwork. The other end of the linear telescopic unit is fixed with a laser detection module. The laser detection module comprises a mounting frame arranged along the parallel steel formwork axis direction for fixing a laser flatness measuring instrument. The mounting frame is rotationally matched with the linear telescopic unit, and the rotation axis is parallel to the axis of the steel formwork. The linear telescopic unit and the mounting frame are driven by independent power sources and rotate around the respective rotation axes. The application can realize rapid detection of the flatness of the arc-shaped steel formwork, and the detection precision is high.