156 results about "Laser plane" patented technology

The invention relates to the technical field of flatness detection, in particular to an aluminum-based foil surface flatness detection mechanism which comprises a support, a detection device and a follow-up device, the detection device comprises two detection assemblies and two driving assemblies, and each detection assembly comprises a sliding rail, a sliding block, a connecting block, a linear laser emitting unit and a linear laser receiving unit. The connecting block is rotationally connected with the sliding block, the rotating axis of the connecting block and the rotating axis of the sliding block are parallel to a laser plane emitted by the linear laser emitting unit, the driving assembly is used for driving the sliding block to slide on the sliding rail to form two parallel laser planes, and the laser planes are perpendicular to the aluminum-based foil. According to the designed surface flatness detection mechanism for the aluminum-based foil, the detection device is driven by the follow-up device to detect the aluminum-based foil moving on a production line.

The invention discloses a three-dimensional space velocity field measuring device and method suitable for a helicopter nozzle, and belongs to the technical field of aerodynamics test. The problems that in the prior art, a traditional three-dimensional velocity field measuring device and method are complex in arrangement and low in calculation efficiency are solved. A scanning type measuring device is built, a laser plane is calibrated, internal and external parameters of a double-exposure camera are calibrated, a checkerboard calibration plate is used for building a standard space plane grid, and a high-precision translation table is controlled by a computer to move to a designated position. Triggering each component through a digital pulse signal generator and synchronously controlling the two double-exposure cameras to collect particle images when the spray pipe sprays flow; and a three-dimensional velocity field based on the particle image is determined, and a three-dimensional space velocity field of jet flow of the jet pipe is obtained. According to the invention, high-precision and high-resolution velocity field data are effectively provided, accurate measurement of the three-dimensional velocity field of the helicopter nozzle is realized, and the method can be applied to measurement of the three-dimensional velocity field of the helicopter nozzle.

The invention provides a high-dynamic deformation measurement system and method based on laser section contour differential scanning. The measurement system is composed of a section contour measurement unit, a calibration unit, an error compensation unit and a data processing unit, wherein the section contour measurement unit comprises a multi-sight-line structured light sensor module, a speed sensing module and a distance measurement module; the calibration unit comprises a synchronous control module, an adjustment module and a common tooth-shaped calibration target; the error compensation unit comprises a vibration detection module, a posture detection module and a temperature detection module; the data processing unit is a device with programming and computing functions. The measuring method comprises the following steps: (1) calibrating a laser plane and an image plane; (2) unifying a global coordinate system; (3) obtaining point cloud data; (4) error compensation; (5) constructing a deformation time-history model; and (6) carrying out maximum deformation global optimization. According to the measurement system and method, accurate expression and maximum value global optimization of a pavement micro-deformation three-dimensional space under the load effect can be realized.

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 belongs to the technical field of intelligent garbage cranes, and particularly relates to an automatic control method of an intelligent garbage crane, which comprises the following specific steps of: positioning a crane cart moving along an X axis by using a laser sensor, positioning a crane trolley moving along a Y axis by using an absolute value encoder so as to sense the position of a crown block, and then positioning the crane trolley along the Y axis by using an absolute value encoder. The central control system is used for accurately controlling the movement of the cart and the trolley and the grab postures moving along the Z axis according to the position of the trolley; a laser holder sensor is arranged on a cart and is vertically aligned with a garbage bin under a crown block, so that the height of garbage below can be measured by utilizing a vertical laser surface diverged by a laser holder. The intelligent garbage crane is controlled through the control method, the problem that when an existing intelligent garbage crane runs, the overall logicality of the intelligent garbage crane is poor can be solved, then the running smoothness of the intelligent garbage crane can be improved, and therefore the running efficiency of the intelligent garbage crane can be improved.

The present application relates to the field of measurement technology, and in particular to a rapid measurement system for aviation blades based on a four-line structured light sensor, wherein the measurement system comprises: four line structured light sensors and a calculation processing module mounted on a three-dimensional coordinate measuring machine; determining the equation of the laser plane in the camera coordinate system based on a target; solving the three-dimensional coordinates of the target point on the intersection of the laser plane and the blade in the camera coordinate system based on the equation; establishing a transformation relationship between the camera coordinate system and the machine coordinate system of the three-dimensional coordinate measuring machine, converting the target point to the machine coordinate system, and realizing three-dimensional scanning measurement; obtaining the point cloud data of the standard sphere in the sensor external parameter calibration module, fitting and outputting a point cloud sphere; using the center of the point cloud sphere as the measurement reference, combining the measurement data of multiple line structured light sensors to obtain the measurement result. Through the present application, only one-dimensional movement along the Z axis of the three-dimensional coordinate measuring machine is required to complete the measurement, thereby improving the measurement efficiency.

The invention belongs to the technical field of measurement, and relates to a coordinate system calibration method and system for a single base station positioning system, and the method comprises the steps: 1) building a coordinate unification experiment platform; 2) measuring coordinate values of the six photoelectric receivers under the cooperative target coordinate system when the base point is used as an original point of the cooperative target coordinate system; 3) measuring rotation angles of the two laser planes when the two laser planes scan the six photoelectric receivers, and calculating laser plane parameters according to the rotation angles; 4) simultaneously solving to obtain a rotation matrix and a translation matrix by using the laser plane parameters and the coordinate value of the photoelectric receiver under the cooperative target coordinate system; 5) constraining and optimizing the rotation matrix and the translation matrix by using the distance between each photoelectric receiver and the laser plane; and 6) calculating the coordinate of the original point of the cooperative target coordinate system in the laser emission station coordinate system based on the optimized rotation matrix and translation matrix. Space coordinate measurement with millimeter-level precision can be realized.

The invention provides a hand-eye calibration method for improving tracking and positioning precision of a line laser contourgraph, which comprises an execution mechanism, the line laser contourgraph, a calibration plane and a calibration block, and comprises the following steps of: adjusting the line laser contourgraph to be vertical to the calibration plane and a laser line to fall on a calibration straight line; collecting a blind area information set for calibration; obtaining an original point of the line laser contourgraph; obtaining a laser angular bisector direction of the line laser contourgraph; and obtaining a coordinate system conversion relation between the line laser contourgraph and the tail end of the execution mechanism. According to the technical scheme provided by the invention, the position of the calibration block in the laser plane of the laser contourgraph is adjusted to form a blind area shielded by the laser, so that the coordinate system transformation matrix of the laser of the line laser contourgraph and the coordinate system of the execution mechanism is calibrated, and the laser position posture of the line laser contourgraph is accurately controlled; high-precision calibration objects do not need to be customized, and operation is easy and convenient.

The invention discloses a compensation method for attitude change of a line laser three-dimensional reconstruction system, and relates to the field of three-dimensional measurement. The method solves the problem that after an existing line laser three-dimensional reconstruction system shoots a camera calibration picture, after the posture is changed due to the influence of the external environment, three-dimensional reconstruction cannot be carried out on a measured target through an original calibration result, and the method comprises the steps that the structure and the initial posture of the line laser three-dimensional reconstruction system are determined, shooting a camera calibration image and a laser plane calibration image; performing camera internal parameter calibration and laser plane calibration on the image, and storing an internal parameter matrix and a laser plane equation of the camera; using an attitude sensor to collect attitude transformation matrixes before and after displacement; combining the attitude transformation matrix to obtain a camera external parameter matrix of the line laser three-dimensional reconstruction system after position and attitude updating; the displacement direction of the system is calibrated, linear laser scanning is performed, a laser stripe image is shot, and three-dimensional reconstruction is performed in combination with a compensation algorithm. The method is also suitable for the field of linear laser stripe image reconstruction.

The invention relates to the field of detection, in particular to a bridge arc-shaped steel formwork flatness detection device and method.The bridge arc-shaped steel formwork flatness detection device comprises a positioning frame used for supporting and positioning a steel formwork and further comprises a detection frame used for fixing a detection mechanism, the detection mechanism comprises a set of linear telescopic units, and one end of each linear telescopic unit is matched with the detection frame in a rotating mode; the rotation axis is parallel to the axis of the steel template; a laser detection module is fixed at the other end of the linear telescopic unit; the laser detection module comprises an installation frame which is arranged in the direction parallel to the axis of the steel formwork and used for fixing a laser flatness measuring instrument, the installation frame is matched with the linear telescopic unit in a rotating mode, the rotating axis is parallel to the axis of the steel formwork, and the linear telescopic unit and the installation frame are driven by independent power sources to rotate around the rotating axes of the linear telescopic unit and the installation frame respectively. According to the invention, rapid detection of the flatness of the die surface of the arc-shaped steel template can be realized, and the detection precision is high.

The invention relates to the technical field of image processing, solves the technical problems that vectors at splicing positions are abnormal during flow field splicing calculation among multiple cameras in large-view-field measurement and the deviation between the flow velocity and the actual flow velocity is calibrated, and particularly relates to a large-view-field two-dimensional flow field splicing calibration method for particle image velocity measurement. Comprising the steps of data acquisition, calibration parameter calculation, calibration parameter correction, homography matrix calculation, PIV displacement field calculation, displacement field splicing, scale transformation and offset calibration, velocity field calculation and the like. According to the method, the problem that vectors at splicing positions are abnormal during flow field splicing calculation among multiple cameras in PIV-2D2C large-view-field measurement is solved, meanwhile, when an image plane is calibrated to be not completely parallel to a laser plane, the deviation between the flow velocity and the actual flow velocity is calculated, and the PIV measurement precision is improved. Moreover, the method is high in universality, can complete the splicing calibration only through the additional shooting of one calibration image, is simple in operation, and is wide in application prospect.

An error correction method and device for a line structured light 3D camera. The method comprises: placing a 3D calibration plate at different positions in the field of view of the 3D camera, and allowing a relative motion to scan the 3D calibration plate to obtain multiple sets of point cloud data at different positions; processing the point cloud data and calculating corner coordinates of the 3D calibration plate corresponding to each set of point cloud data; constructing an error correction model by using an inclination angle, caused by an error, between a straight line along which the relative motion direction lies and a laser plane of the 3D camera as an error model correction parameter; calculating error correction model parameters according to a space vector constraint relationship between corner points; and applying the model to the point cloud data of a measured object to obtain distortion-free point cloud data.

Various laser level designs are shown. In one example, a laser level includes a rotating laser projection assembly to allow users to adjust the placement of the discontinuity in the projected laser plane. In another example, the laser level includes a lanyard attachment robust enough to support the weight of the laser level. The lanyard attachment includes a plurality of prongs that enhance the coupling to the housing of the device.

The invention relates to the technical field of correction optimization, in particular to a watermelon and melon transplanting machine field path automatic correction optimization method based on laser navigation, which comprises the following steps: capturing a reference laser signal projected by a laser plane transmitter in real time through a laser receiver array; calculating a real-time pitch angle and a roll angle of the transplanting machine according to the irradiation position distribution of the reference laser signal in the receiver array; generating a calibration laser plane equation based on the real-time pitch angle and the roll angle; synchronously outputting transverse position deviation and course angle deviation; according to the coupling relation between the transverse position deviation and the course angle deviation, steering motor control quantity and advancing speed compensation quantity are generated in sections; the steering motor control quantity and the advancing speed compensation quantity are synchronously output to a steering servo system and a walking hydraulic system of the transplanting machine tool, and continuous deviation correction between ridges is achieved. According to the invention, by constructing the laser receiver array and the attitude calculation model, the pitch angle and the roll angle of the transplanting machine in the field operation process can be sensed in real time.

The invention relates to a welding method based on a groove reconstruction strategy. A process pipeline is used for being installed on a rotary table of a positioner, a welding robot is electrically connected with a controller through a control device, the positioner is electrically connected with the controller, and a tracking sensor is arranged at the tail end of a mechanical arm of the welding robot and fixedly connected with a welding gun on the welding robot. The tracking sensor is electrically connected with the controller; the welding method comprises the steps that a groove of the process pipeline is reconstructed through the controller; the multi-layer and multi-pass welding is planned through the controller; backing welding is conducted on the groove of the process pipeline; after backing welding is completed, multi-layer and multi-pass welding is conducted on the groove of the process pipeline; through groove reconstruction and conversion between the weld joint section and the laser plane feature points, the influence of coaxiality errors, ovality errors, groove cutting errors and installation errors of the process pipeline on the welding quality is better reduced, meanwhile, the influence of pipeline thermal deformation on the welding quality in the welding process is solved, and the welding precision and the weld joint quality are improved.

The invention provides a method for measuring the precision of a linear structured light vision sensor, which is characterized in that a stepped target is adopted for the precision measurement in the Z-axis direction, and the obtained data is converted by solving the conversion relationship between a light plane coordinate system and a camera coordinate system only by enabling the stepped target to be parallel to the end surface of a lens without vertically projecting a light plane to the target, so that the precision of the linear structured light vision sensor is measured. And the final Z-axis precision can be obtained. For precision measurement in the Y-axis direction, a collimating plate with a measurement function is used, and the Y-axis precision is evaluated by identifying the position of a light bar breakpoint. Meanwhile, in order to conveniently measure the Z axis and the Y axis at the same time, the measuring device is provided and comprises a base, a step target, a collimating plate, light guide positions and a reflector, laser penetrates through characteristic holes in the collimating plate and is reflected to the light guide positions through the reflector, all the light guide positions are bright, and the step target is arranged on the base. And judging that the direction vector of the Y-axis direction of the laser plane is parallel to the direction vector formed by the characteristic holes.

The invention discloses a binocular full-angle laser three-dimensional scanning device and method for the interior of a narrow pipeline. The device comprises a Mecanum main driving wheel, a binocular camera, a full-angle laser transmitter and a driven wheel. According to the invention, after the device enters a pipeline to move at a constant speed and a binocular annular laser scanning binocular image sequence is obtained to be corrected and corrected, a laser stripe segmentation result is obtained through a GuideNet-based laser stripe segmentation method, and a binocular annular laser center line is extracted based on a Steger algorithm, so that a laser stripe segmentation result is obtained. And extracting a laser center point of the annular middle section area and performing three-dimensional reconstruction, fitting a transient laser plane by using the point cloud of the part, fitting a full-angle annular laser ring three-dimensional point cloud of the current image frame based on the transient laser plane, and finally realizing splicing of the laser point cloud corresponding to each frame of image by combining the movement speed and the image frame rate. And three-dimensional reconstruction of the inner surface of the pipeline is realized. Accurate data can be provided for pipeline deformation detection, and the method has high engineering application value.

The invention belongs to the technical field of water and soil conservation research devices, and relates to a three-dimensional landform observation device for ecological visualization, which comprises a landform instrument host and an image acquisition device. The landform instrument host is convenient to carry and can project parallel laser planes at any height and equal intervals to the observed landform after being quickly adjusted. The image acquisition device can record the dynamic change process of the parallel laser projected on the landform surface from any angle. Through cooperation of the two, a three-dimensional terrain model can be constructed, gravitational erosion quantitative observation is realized, and water and soil loss dynamic monitoring data in a mining area ecological visualization system is supplemented. According to the device, the emission angle and the adjacent distance of the laser straight line instrument are accurately adjusted by utilizing the combination of the scale optical axis and the fixed rotating shaft. And the shooting angle of the camera for image acquisition is randomly adjusted through the U-shaped rod and the bracket adjusting seat. According to the invention, the emission angle and spacing of the laser module can be easily and accurately adjusted, and the shooting angle of the video equipment can be adjusted.

The invention provides a line laser contourgraph calibration method and a light path deviation quantitative evaluation method applying the same, and the method comprises the steps: adjusting the pose of an execution mechanism, and obtaining the laser straight line information formed by a line laser contourgraph at an initial position on a calibration plane and the end information of the execution mechanism; translating the executing mechanism to obtain a laser straight line information set for calibration and an executing mechanism tail end information set; and calculating and obtaining a line laser profiler-actuating mechanism tail end coordinate transformation relation based on the information. According to the technical scheme, the position and geometric feature information of the laser plane are directly calibrated, so that the laser position posture of the line laser contourgraph is accurately controlled, the situation that quantitative data of the contourgraph is used for calculating feature transfer calculation is avoided, the calibration precision is improved, a high-precision three-dimensional calibration block does not need to be used, and the requirement for a calibration object and the calibration complexity are reduced.

The invention discloses an underwater three-dimensional point cloud generation method of a line laser scanning device, and belongs to the field of laser. The galvanometer is used for refracting the laser emitted by the laser; the controller is used for controlling the deflection amplitude and the angular velocity of the galvanometer; and the camera is used for shooting the process of scanning and traversing the target by the laser rays refracted by the galvanometer. The method comprises the following steps of: calibrating the camera; carrying out distortion processing; extracting laser rays; calibrating a laser plane; three-dimensional reconstruction: obtaining three-dimensional point cloud data of the target surface; according to the method in the three-dimensional point cloud generation process, the three-dimensional point cloud generation of the underwater scene is realized based on the underwater double refraction model when the image is processed, and finally, the noise of the obtained target point cloud is removed to obtain the three-dimensional point cloud data with relatively high robustness.

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.

The invention relates to the field, in particular to automatic assembling equipment for a backlight module. Comprising a working line and a three-axis moving mechanism arranged beside the working line, and further comprises a plurality of bearing mechanisms which are arranged along a working line conveying belt at equal intervals in an array mode and comprise carriers, the carriers are fixedly connected with the upper end of the working line conveying belt, and each assembling mechanism comprises a main support, a main rolling shaft and two limiting clamping mechanisms; the main support is fixedly connected with the output end of the three-axis moving mechanism, the main rolling shaft is rotationally arranged at the lower end of the main support through a shaft seat, the two limiting clamping mechanisms are arranged on the two sides of the main support, each limiting clamping mechanism comprises an auxiliary support, an abutting roller, two receding pressing plates and two laser plane interferometers, the auxiliary supports are in sliding connection with the main support, and the abutting rollers are arranged on the auxiliary supports. The abutting roller is arranged on the side, close to the main rolling shaft, of the lower end of the auxiliary support, the two receding pressing plates are arranged below the auxiliary support in a sliding mode, and the two laser plane interferometers are fixedly connected with the lower ends of the two receding pressing plates respectively.

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.