A large-size curved surface component three-dimensional appearance rapid measurement device and method and defect identification method

Abstract

The application provides a large-size curved surface component three-dimensional appearance rapid measurement device and method and a defect identification method. The device comprises a measurement space field, a measurement positioning target array, two gantry supports, two three-dimensional guide rails, two mechanical rotary tables, two laser three-dimensional scanning sensors, two image sensors, two collision detection sensors, a support table, a conveying guide rail and a computer installed with measurement analysis software; the two laser three-dimensional scanning sensors, the two image sensors and the two collision detection sensors are respectively installed on the two mechanical rotary tables and connected with the computer installed with the measurement analysis software through power lines and signal transmission lines. The application can be widely applied in the field of large-size structural parts, part on-site testing, inspection and assembly, has the characteristics of high precision, high efficiency, high automation, unattended operation, strong expandability and can meet the requirements of rapid measurement and inspection of large-size structural parts in the field of aviation and aerospace.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of large-size curved surface component measurement, and particularly relates to a large-size curved surface component three-dimensional appearance rapid measurement device and method and a defect identification method. BACKGROUND

[0002] Large-size curved surface structural members are increasingly widely used in the field of aerospace. These structural members, such as rocket cabin sections, wall plates, aircraft wing surfaces, rudder surfaces, etc., are not only huge in size, but also complex in shape and variable in curved surface, which brings great challenges to their accurate measurement. Traditional measurement methods, such as contact measurement and plane projection measurement, have been difficult to meet the demand of high-precision and high-efficiency measurement of large-size curved surface structural members in the modern aerospace field.

[0003] In recent years, three-dimensional appearance measurement technology has developed rapidly, especially in the fields of machine vision, laser scanning and computer graphics, which has made significant progress. These technologies provide new ideas and methods for three-dimensional appearance measurement of large-size structural members. Among them, three-dimensional measurement technology based on binocular vision has been widely used in the measurement of large-size curved surface structural members due to its non-contact, high speed and high precision. However, due to the large size and complex shape of the large-size curved surface structural members in aerospace, a single binocular vision measurement system often cannot cover the entire measurement area. With the increasing update of intelligent production lines, new challenges have been put forward for the accuracy, digitization and efficiency of large-size structural member measurement.

[0004] Patent document CN103644860A discloses a "large space free-form surface measurement method", which measures the geometric size of the measured surface by setting a large number of reflective markers on the measured surface and using a digital photogrammetry system. Since a large number of reflective markers need to be pasted on the measured member, the measurement efficiency is low and the quality of the product itself is easily affected, which cannot meet the rapid measurement of products on the industrial production line.

[0005] Patent document CN106959080A discloses a "large complex curved surface component three-dimensional appearance optical measurement system and method", which is based on binocular grating projection measurement technology and uses a laser tracker and corresponding target ball to obtain the point cloud pose of each station during multi-station measurement. The measurement accuracy of this method depends on the end positioning accuracy of the robot, and the accuracy is difficult to guarantee. In addition, the use of a tracker and its target for global positioning can easily cause light path obstruction on the processing production line, resulting in a large error in coordinate conversion.

[0006] With the increasing update of intelligent production lines, new challenges have been put forward for the accuracy, digitization and efficiency of large-size structural member measurement, and the existing technology cannot meet the demand. SUMMARY

[0007] The technical problem solved by the present application is: in view of the shortcomings of the existing large-size three-dimensional topography measurement technology, a rapid measurement device and a defect identification method are provided to realize high-precision and high-efficiency on-site measurement. The measurement device and method have the characteristics of simple and fast, strong scalability and high degree of digitization, and meet the production line detection and inspection requirements of large-size curved surface structural parts.

[0008] In order to solve the above technical problems, the present application provides a large-size curved surface component three-dimensional topography rapid measurement device, characterized in that it comprises a measurement space field, a measurement positioning target array, two gantry supports, two three-dimensional guides, two mechanical rotary tables, two laser three-dimensional scanning sensors, two image sensors, two collision detection sensors, a support table, a conveying guide and a computer installed with measurement analysis software.

[0009] The measurement space field is a semi-closed space, and the length, width and height are determined by the size of the measured curved surface structural part. The left side, right side, top surface and back of the semi-closed space are solid walls, and the front is an open space for feeding and discharging the measured curved surface structural part.

[0010] The measurement positioning target array comprises measurement positioning targets and scale rods, wherein the measurement positioning targets are evenly distributed on the solid walls of the left side, right side, top surface and back of the measurement space field, and the scale rods are length-traced to the upper level, and the measurement positioning targets are installed at both ends of the scale rods. The scale rods are evenly distributed on the solid walls of the left side, right side, top surface and back of the measurement space field.

[0011] The two gantry supports are fixed to the foundation and placed in the measurement space field, and the distance between the two gantry supports is greater than 2 times the width of the measured curved surface structural part.

[0012] The two three-dimensional guides are respectively arranged on the two gantry supports, and the three-dimensional guides are used for three-dimensional translation within the space range of the measured curved surface structural part.

[0013] The two mechanical rotary tables are respectively fixedly installed at the ends of the two three-dimensional guides, one end of the conveying guide is connected with the support table, and the other end is a feeding and discharging port of the measured part. The bottom surface of the support table is stably connected with the foundation.

[0014] The two laser three-dimensional scanning sensors, two image sensors and two collision detection sensors are respectively installed on the two mechanical rotary tables, and are connected with the computer installed with measurement analysis software through power lines and signal transmission lines.

[0015] Further, it further comprises a fixed tool support, and the fixed tool support comprises a mounting tool support for the laser three-dimensional scanning sensor and the image sensor, and a mounting tool support for the collision detection sensor.

[0016] Further, the measurement positioning target is a black or silver target point that can be recognized by the laser three-dimensional scanning sensor, and the number of measurement positioning targets on each wall surface is greater than or equal to 30.

[0017] Further, the number of scale rods on each wall surface is greater than or equal to 3.

[0018] Further, the number of scale rods on each wall surface is 3, and the 3 scale rods are arranged in a horizontal, vertical, and horizontal 45° angle, respectively.

[0019] Further, the mechanical turntable performs pitching and yawing within ±165° and rolling within 300°.

[0020] Further, the top surface of the support table is larger than the envelope area of the bottom surface of the measured member.

[0021] Further, the computer is an industrial computer.

[0022] The application also provides a large-size curved surface component three-dimensional topography rapid measurement method, which uses the large-size curved surface component three-dimensional topography rapid measurement device and comprises the following steps:

[0023] S1, the computer controls two laser three-dimensional scanning sensors to scan the measurement positioning target array, obtains the spatial position, and unifies the two laser three-dimensional scanning sensors to the same measurement coordinate system.

[0024] S2, the conveying guide rail conveys the measured curved surface structure to the support table for fixation, controls the two three-dimensional guide rails to drive the two laser three-dimensional scanning sensors to move to the measurement starting end of the measured curved surface structure, adjusts the fields of view of the two laser three-dimensional scanning sensors to face the measured curved surface structure, and keeps the front end of the two laser three-dimensional scanning sensors at a distance of 200mm to 300mm from the measured curved surface structure.

[0025] S3, the two three-dimensional guide rails move according to the pre-planned motion track, drive the two laser three-dimensional scanning sensors, and synchronously scan the inner and outer surfaces of the measured curved surface structure from top to bottom and from left to right.

[0026] S4, after the scanning of all the measured regions is completed, the system is reset, the measurement analysis software processes the collected point cloud data and triangulates and reconstructs, and calculates the geometric topography parameters of the measured curved surface structure.

[0027] The application also provides a large-size curved surface component three-dimensional topography rapid measurement defect identification method, which uses the large-size curved surface component three-dimensional topography rapid measurement device and comprises the following steps:

[0028] A1, the conveying guide rail conveys the measured curved surface structure to the support table for fixation, controls two three-dimensional guide rails to drive two laser three-dimensional scanning sensors and image sensors to move to the measurement starting end of the measured curved surface structure, adjusts the field of view of the two laser three-dimensional scanning sensors to face the measured curved surface structure, and the front end is kept between 200mm and 300mm away from the measured curved surface structure;

[0029] A2, the two three-dimensional guide rails move according to the pre-planned motion trajectory, drive the two laser three-dimensional scanning sensors to synchronously scan the inner and outer surfaces of the measured curved surface structure from top to bottom and from left to right;

[0030] A3, after completing the three-dimensional scanning of all measured areas, the two three-dimensional guide rails are reset, at the same time, the two mechanical turntables are rotated by 90°, so that the field of view of the image sensors faces the measured curved surface structure, the visual shooting is started, the two three-dimensional guide rails move according to the pre-planned motion trajectory, drive the two image sensors to respectively shoot images of the inner and outer surfaces of the measured curved surface structure from top to bottom and from left to right in a divided area;

[0031] A4, after the image shooting is completed, the measurement analysis software processes the collected point cloud data and triangulation reconstruction, and calculates the geometric appearance parameters of the measured curved surface structure, the defect recognition software processes the actual pictures, calls a deep learning algorithm, and recognizes the surface defects, scratches and pits of the measured curved surface structure.

[0032] The present application has the following advantages:

[0033] The present application adopts a multi-channel laser scanning and image recognition method, constructs a space measurement field and a three-dimensional motion mechanism, realizes on-site rapid measurement and inspection of large-size curved surface structure, forms a complete on-site measurement method and system, the technical method and the constructed system can be applied to on-site measurement, inspection and assembly of other large-size structures, the measurement system and the measurement method have the characteristics of high precision, high efficiency, high automation, unattended, strong scalability and the like, and can meet the rapid measurement and inspection of large-size structure products in the fields of aviation and aerospace. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor. It should be noted that, in order to be clear and easy to illustrate, the drawings are not necessarily drawn to scale.

[0035] Figure 1The figure is a schematic diagram of the overall layout of the large-size curved surface component three-dimensional appearance rapid measuring device of the present application.

[0036] Figure 2 The figure is a schematic diagram of the overall layout of the large-size curved surface component three-dimensional appearance rapid measuring device of the present application.

[0037] Figure 3 The figure is a schematic diagram of the gantry and three-dimensional guide rail structure of the large-size curved surface component three-dimensional appearance rapid measuring device of the present application.

[0038] Figure 4 The figure is a schematic diagram of the measuring and positioning target array of the large-size curved surface component three-dimensional appearance rapid measuring device of the present application.

[0039] Explanation of reference numerals:

[0040] 1-measuring space field, 2-measuring and positioning target array, 9-supporting table, 10-conveying guide rail, 11-signal transmission route, 12-computer, 31-left gantry support, 32-right left gantry support, 41-left three-dimensional guide rail, 42-right three-dimensional guide rail, 51-left laser three-dimensional scanning sensor, 52-right laser three-dimensional scanning sensor, 61-left image sensor, 62-right image sensor, 71-left mechanical turntable, 72-right mechanical turntable, 81-left collision detection sensor, 82-right collision detection sensor, 201-first scale rod, 202-second scale rod, 203-third scale rod, 401-left X-direction axial movement shaft, 402-left Y-direction axial movement shaft, 403-left Z-direction axial movement shaft, 404-right X-direction axial movement shaft, 405-right Y-direction axial movement shaft, 406-right Z-direction axial movement shaft.

[0041] Specific implementation

[0042] The present application will be further described below in conjunction with the drawings.

[0043] Figure 1 The figure is a schematic diagram of the overall layout of the large-size curved surface component three-dimensional appearance rapid measuring device of the present application. Figure 2 The figure is a schematic diagram of the overall layout of the large-size curved surface component three-dimensional appearance rapid measuring device of the present application. Figures 1-2As shown, the large-size curved surface component three-dimensional appearance rapid measurement device of the present application comprises a measurement space field 1, a measurement positioning target array 2, two gantry supports (left gantry support 31 and right gantry support 32), two three-dimensional guide rails (left three-dimensional guide rail 41 and right three-dimensional guide rail 42), two laser three-dimensional scanning sensors (left laser three-dimensional scanning sensor 51 and right laser three-dimensional scanning sensor 52), two image sensors (left image sensor 61 and right image sensor 62), two mechanical rotary tables (left mechanical rotary table 71 and right mechanical rotary table 72), two collision detection sensors (left collision detection sensor 81 and right collision detection sensor 82), a support table 9, a conveying guide rail 10, a signal transmission line 11, a computer 12 installed with measurement analysis software, and a fixed tool support. During measurement, the three-dimensional geometric appearance of the measured curved surface structure is scanned by the laser three-dimensional scanning sensor, and the surface defects of the measured curved surface structure are identified by the image sensor. The fixed tool support includes the installation tool support of the laser three-dimensional scanning sensor and the image sensor, and the installation tool support of the collision detection sensor.

[0044] As shown, Figure 2 The two laser three-dimensional scanning sensors (left laser three-dimensional scanning sensor 51 and right laser three-dimensional scanning sensor 52), the two image sensors (left image sensor 61 and right image sensor 62), and the two collision detection sensors (left collision detection sensor 81 and right collision detection sensor 82) are respectively installed on the mechanical rotary tables (left mechanical rotary table 71 and right mechanical rotary table 72), and the mechanical rotary tables (left mechanical rotary table 71 and right mechanical rotary table 72) are respectively fixed at the ends of the two three-dimensional guide rails (left three-dimensional guide rail 41 and right three-dimensional guide rail 42). The mechanical rotary tables (left mechanical rotary table 71 and right mechanical rotary table 72) can perform pitching, yawing within ±165°, and rolling within 300°.

[0045] Figure 3 It is a gantry and three-dimensional guide rail structure diagram of the large-size curved surface component three-dimensional appearance rapid measurement device of the present application. As shown, Figure 3 The left three-dimensional guide rail 41 comprises three axial movement shafts, i.e., a left X-direction axial movement shaft 401, a left Y-direction axial movement shaft 402, and a left Z-direction axial movement shaft 403, and the right three-dimensional guide rail 42 comprises three axial movement shafts, i.e., a right X-direction axial movement shaft 404, a right Y-direction axial movement shaft 405, and a right Z-direction axial movement shaft 406.

[0046] The measurement space field 1 is a semi-closed space, and the length, width, and height thereof are determined by the size of the measured curved surface structure, wherein the left side, the right side, the upper top, and the back are solid walls, and the front is an open space for feeding and discharging the measured curved surface structure.

[0047] Figure 4The figure shows a schematic diagram of the measurement positioning target array of the large-size curved surface component three-dimensional topography rapid measurement device of the present application. Figure 4 As shown in the figure, the measurement positioning target array 2 comprises measurement positioning targets and scale rods, wherein the measurement positioning targets are uniformly distributed on the left side surface, the right side surface, the upper top surface and the rear solid wall surface of the measurement space field 1, and the scale rods are uniformly distributed on the left side surface, the right side surface, the upper top surface and the rear solid wall surface of the space field.

[0048] The measurement positioning targets are black and silver gray target points, which can be recognized by a laser three-dimensional scanning sensor.

[0049] The scale rods are greater than or equal to 3 in number on each wall surface, Figure 4 As shown in the figure, three scale rods are shown, which are a first scale rod 201, a second scale rod 202 and a third scale rod 203, and the three scale rods are not parallel to each other, and preferably, the three scale rods are placed horizontally, vertically and at a horizontal angle of 45°, respectively.

[0050] The two gantry supports (a left gantry support 31 and a right gantry support 32) are fixed to the foundation and placed in the measurement space field, and the distance between the two gantry supports (the left gantry support 31 and the right gantry support 32) is greater than 2 times the width of the measured curved surface structural component.

[0051] The two three-dimensional guide rails (a left three-dimensional guide rail 41 and a right three-dimensional guide rail 42) are respectively arranged on the two gantry supports (the left gantry support 31 and the right gantry support 32), and the three-dimensional guide rails (the left three-dimensional guide rail 41 and the right three-dimensional guide rail 42) can move in three dimensions within the spatial range of the measured curved surface structural component.

[0052] The bottom surface of the support table 9 is stably connected to the foundation, and the top surface of the support table 9 is larger than the envelope area of the bottom surface of the measured component.

[0053] The three-dimensional scanning sensor (a left laser three-dimensional scanning sensor 51 and a right laser three-dimensional scanning sensor 52), the image sensor (a left image sensor 61 and a right image sensor 62) and the collision detection sensor (a left collision detection sensor 81 and a right collision detection sensor 82) are respectively installed on the left mechanical turntable 71 and the right mechanical turntable 72, and are connected to the computer 12 installed with measurement and analysis software through power lines and data lines (signal transmission lines 11). The computer is an industrial computer.

[0054] One end of the conveying guide rail 10 is connected to the support table 9, and the other end is a loading and unloading port of the measured component.

[0055] The large-size curved surface structural component three-dimensional topography rapid measurement method of the present application is as follows:

[0056] The computer 12 controls the two laser three-dimensional scanning sensors (the left laser three-dimensional scanning sensor 51 and the right laser three-dimensional scanning sensor 52) to scan the measurement positioning target array 2 (including the first scale rod 201, the second scale rod 202, and the third scale rod 203) for the first time on site, to obtain the spatial position, and to unify the two laser three-dimensional scanning sensors (the left laser three-dimensional scanning sensor 51 and the right laser three-dimensional scanning sensor 52) under the same measurement coordinate system.

[0057] The conveying guide rail 10 conveys the measured curved surface structural member to be fixed on the support table 9; the system is reset, and the two three-dimensional guide rails (the left three-dimensional guide rail 41 and the right three-dimensional guide rail 42) drive the two laser three-dimensional scanning sensors (the left laser three-dimensional scanning sensor 51 and the right laser three-dimensional scanning sensor 52) installed at the ends thereof to move to the measurement starting end of the measured curved surface structural member, preferably, the upper left position of the structural member, the fields of view of the two laser three-dimensional scanning sensors (the left laser three-dimensional scanning sensor 51 and the right laser three-dimensional scanning sensor 52) are adjusted to face the measured curved surface structural member, and the frontmost ends are kept at a distance of 200mm to 300mm from the measured curved surface structural member.

[0058] After the measurement is started, the two three-dimensional guide rails (the left three-dimensional guide rail 41 and the right three-dimensional guide rail 42) move according to the planned movement track, drive the two laser three-dimensional scanning sensors (the left laser three-dimensional scanning sensor 51 and the right laser three-dimensional scanning sensor 52) installed at the ends thereof to synchronously scan the inner and outer surfaces of the measured curved surface structural member from top to bottom and from left to right.

[0059] After the scanning of all the measured regions is completed, the system is reset; the measurement analysis software processes the collected point cloud data and triangulates and reconstructs, and calculates the geometric appearance parameters such as the thickness, the height, and the diameter of the measured curved surface structural member.

[0060] The large-size curved surface structural member three-dimensional appearance rapid measurement and defect identification method of the present application is as follows:

[0061] During the on-site measurement, the conveying guide rail 10 conveys the measured curved surface structural member to be fixed on the support table 9; the system is reset, and the two three-dimensional guide rails (the left three-dimensional guide rail 41 and the right three-dimensional guide rail 42) including the two laser three-dimensional scanning sensors (the left laser three-dimensional scanning sensor 51 and the right laser three-dimensional scanning sensor 52) and the image sensors (the left image sensor 61 and the right image sensor 62) installed at the ends thereof move to the measurement starting end of the measured curved surface structural member, preferably, the upper left position of the structural member, the fields of view of the two laser three-dimensional scanning sensors (the left laser three-dimensional scanning sensor 51 and the right laser three-dimensional scanning sensor 52) are adjusted to face the measured curved surface structural member, and the frontmost ends are kept at a distance of 200mm to 300mm from the measured curved surface structural member.

[0062] After starting measurement, two three-dimensional guides (left three-dimensional guide 41 and right three-dimensional guide 42) will move according to the pre-planned motion trajectory, and two laser three-dimensional scanning sensors (left laser three-dimensional scanning sensor 51 and right laser three-dimensional scanning sensor 52) installed at the end thereof will perform regional scanning from top to bottom and from left to right on the inner and outer surfaces of the measured curved surface structure;

[0063] After completing the three-dimensional scanning of all measured regions, the two three-dimensional guides (left three-dimensional guide 41 and right three-dimensional guide 42) are reset, and at the same time, the two mechanical turntables (left mechanical turntable 71 and right mechanical turntable 72) are rotated by 90°, so that the fields of view of the image sensors (left image sensor 61 and right image sensor 62) are directly opposite the measured curved surface structure; start image shooting, and the two three-dimensional guides (left three-dimensional guide 41 and right three-dimensional guide 42) will move according to the pre-planned motion trajectory, and the image sensors (left image sensor 61 and right image sensor 62) will perform regional image shooting from top to bottom and from left to right on the inner and outer surfaces of the measured curved surface structure, respectively.

[0064] After the image shooting is completed, the system is reset; the measurement and analysis software 12 processes the collected point cloud data and performs triangulation reconstruction, and calculates the geometric appearance parameters such as thickness, height and diameter of the measured curved surface structure. The defect recognition software processes the actual pictures, calls a deep learning algorithm, and identifies the surface defects, scratches and pits of the measured curved surface structure.

[0065] The large-size curved surface component three-dimensional appearance rapid measurement device and method provided by the application can be widely applied in the field of on-site testing, inspection and assembly of large-size structural parts, has the characteristics of high precision, high efficiency, high automation, unattended operation and strong expandability, and can meet the requirements of rapid measurement and inspection of geometric appearance of large-size structural parts in the field of aerospace.

[0066] Although the application has been disclosed with reference to the preferred embodiments as above, it is not intended to limit the application, and any person skilled in the art can make possible changes and modifications to the technical solutions of the application by using the disclosed methods and technical contents without departing from the spirit and scope of the application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the application, which does not depart from the content of the technical solutions of the application, belongs to the protection scope of the technical solutions of the application. The contents not described in detail in the specification of the application are the known technology of the person skilled in the art.

Claims

1. A rapid measurement device for the three-dimensional morphology of large-size curved surface components, characterized in that, It includes a space field measurement device, a target array for measurement and positioning, two gantry supports, two three-dimensional guide rails, two mechanical turntables, two laser three-dimensional scanning sensors, two image sensors, two collision detection sensors, a support platform, a conveyor rail, and a computer equipped with measurement and analysis software. The measurement space is a semi-enclosed space, the length, width and height of which are determined by the dimensions of the curved surface structure being measured. The left side, right side, top surface and back are solid walls, and the front is an open space for loading and unloading the curved surface structure being measured. The measurement positioning target array includes measurement positioning targets and scale rods. The measurement positioning targets are evenly distributed on the left side, right side, top surface and the solid wall behind the measurement space field. The length of the scale rod is traced back to the upper level, and measurement positioning targets are installed at both ends. The scale rods are evenly distributed on the left side, right side, top surface and the solid wall behind the measurement space field. The two gantry supports are fixed to the foundation and placed in the measurement space field. The distance between the two gantry supports is greater than twice the width of the measured curved surface structure. The two three-dimensional guide rails are respectively mounted on two gantry supports, and the three-dimensional guide rails perform translation in three dimensions within the spatial range of the measured curved surface structure. The two mechanical turntables are respectively fixedly installed at the ends of the two three-dimensional guide rails. One end of the conveying guide rail is connected to the support platform, and the other end is the loading and unloading port of the workpiece to be measured. The bottom surface of the support platform is stably connected to the foundation. The two laser 3D scanning sensors, two image sensors, and two collision detection sensors are respectively mounted on the two mechanical turntables and connected to a computer with measurement and analysis software installed by power lines and signal transmission lines.

2. The rapid measurement device for the three-dimensional morphology of large-size curved surface components as described in claim 1, characterized in that, It further includes a fixed fixture bracket, which includes a mounting fixture bracket for the laser 3D scanning sensor and the image sensor, as well as a mounting fixture bracket for the collision detection sensor.

3. The rapid measurement device for the three-dimensional morphology of large-size curved surface components as described in claim 1, characterized in that, The measurement and positioning targets are black or silver-gray target points that can be identified by a laser three-dimensional scanning sensor, and the number of measurement and positioning targets on each wall is greater than or equal to 30.

4. The rapid measurement device for the three-dimensional shape of large-size curved surface components as described in claim 1, characterized in that, The number of ruler rods on each wall is greater than or equal to 3.

5. The rapid measurement device for the three-dimensional shape of a large-size curved surface component as described in claim 1, characterized in that, There are 3 ruler rods on each wall, and the 3 ruler rods are placed horizontally, vertically, and at a 45° angle to the horizontal, respectively.

6. The rapid measurement device for the three-dimensional shape of a large-size curved surface component as described in claim 1, characterized in that, The mechanical turntable can pitch and yaw within ±165° and roll within 300°.

7. The rapid measurement device for the three-dimensional shape of large-size curved surface components as described in claim 1, characterized in that, The top surface dimension of the support platform is larger than the bottom envelope area of ​​the tested part.

8. The rapid measurement device for the three-dimensional shape of a large-size curved surface component as described in claim 1, characterized in that, The computer in question is an industrial computer.

9. A method for rapid measurement of the three-dimensional morphology of large-size curved surface components, characterized in that, The device for rapid measurement of the three-dimensional topography of large-size curved surface components according to any one of claims 1 to 8 includes the following steps: S1. The computer controls two laser three-dimensional scanning sensors to scan the target array for measurement and positioning, obtain the spatial position, and unify the two laser three-dimensional scanning sensors into the same measurement coordinate system; S2. The conveyor rails convey the curved surface structure to be measured to the support platform and fix it. Control the two three-dimensional guide rails to drive the two laser three-dimensional scanning sensors to move to the measurement start end of the curved surface structure. Adjust the field of view of the two laser three-dimensional scanning sensors to face the curved surface structure, and keep the distance between the front end and the curved surface structure between 200mm and 300mm. S3. Two three-dimensional guide rails move according to the pre-planned motion trajectory, driving two laser three-dimensional scanning sensors to perform synchronous scanning of the inner and outer surfaces of the measured curved surface structure from top to bottom and from left to right. S4. After all the measured areas have been scanned, the system is reset. The measurement and analysis software will process and triangulate the collected point cloud data, and calculate the geometric parameters of the measured curved surface structure.

10. A method for rapid measurement and defect identification of the three-dimensional morphology of large-size curved surface components, characterized in that, The device for rapid measurement of the three-dimensional topography of large-size curved surface components according to any one of claims 1 to 8 includes the following steps: A1. The conveyor rails convey the curved surface structure to be measured to the support platform and fix it. Control the two three-dimensional guide rails to drive the two laser three-dimensional scanning sensors and image sensors to move to the measurement start end of the curved surface structure. Adjust the field of view of the two laser three-dimensional scanning sensors to face the curved surface structure, and keep the distance between the front end and the curved surface structure between 200mm and 300mm. A2. The two three-dimensional guide rails move according to the pre-planned motion trajectory, driving the two laser three-dimensional scanning sensors to perform synchronous scanning of the inner and outer surfaces of the measured curved surface structure from top to bottom and from left to right. A3. After the three-dimensional scanning of all the measured areas is completed, the two three-dimensional guide rails are reset, and the two mechanical turntables rotate 90° so that the field of view of the image sensor is facing the measured curved surface structure. Visual imaging is started, and the two three-dimensional guide rails move according to the pre-planned motion trajectory, driving the two image sensors to capture images of the inner and outer surfaces of the measured curved surface structure from top to bottom and from left to right. A4. After the image is captured, the measurement and analysis software will process and triangulate the collected point cloud data, and calculate the geometric morphology parameters of the tested curved surface structure. The defect identification software will process the captured actual image, call the deep learning algorithm, and identify surface defects, scratches and pits of the tested curved surface structure.

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