Laser measuring device for wind turbine blades

Abstract

The present invention relates to the field of laser measurement technology and discloses a laser measurement device for blades of a wind turbine generator set, comprising two laser measurement modules, at least two blade groups being installed on the outside of the two laser measurement modules, a column group being installed on the outside of the laser measurement module, the column group being used to support and limit the position of the laser measurement module, a position switching component being installed on the outside of the column group, the position switching component being used to realize position switching of the laser measurement module; a plurality of linear guide rails being installed on the bottom of the laser measurement module, a slider being installed on the surface of each linear guide rail, continuous detection of multiple blade groups by the laser measurement module is realized through the innovative coordinated design of the position switching component and the linear guide rail, the unique curved structure of the transposition groove cooperates with the transposition axis, so that the measurement module can automatically switch between different blade stations, avoiding the cumbersome process of frequent disassembly and assembly of equipment required for traditional single-station detection.

Description

Technical Field

[0001] The present invention relates to the technical field of laser measurement, in particular to a laser measurement device for blades of a wind turbine generator set. Background Art

[0002] Wind turbine blades are key components of wind turbines. They are streamlined and typically made of composite materials such as glass fiber and carbon fiber. They can be tens of meters long and must be high-strength, lightweight, and fatigue-resistant to efficiently capture wind energy and drive the turbine to generate electricity.

[0003] Because blades are exposed to complex and harsh outdoor environments for a long time, they are prone to problems such as cracks, deformation, and surface damage. These defects will significantly affect power generation efficiency and operational safety. Laser detection technology, with its advantages of high precision, non-contact, and fast detection speed, can quickly obtain three-dimensional data of the blade surface, accurately identify tiny defects and deformations, and conduct all-round and full-life cycle quality monitoring of the blades to ensure stable and reliable operation of the wind power generation system.

[0004] However, existing laser measurement devices still have some problems: as the wind power industry develops towards large-scale and high-power directions, the size of blades continues to break through, and the length of a single blade has reached hundreds of meters. In addition, a single wind turbine is usually equipped with several blades, which places extremely high demands on the adaptability and detection efficiency of the detection equipment. However, existing detection schemes generally adopt a pattern of dual laser detection devices symmetrically arranged on both sides of the blade. Although this layout can meet the detection needs of a single blade, it is difficult to achieve the measurement of multiple blades, resulting in significant efficiency shortcomings in the detection process.

[0005] During the actual inspection process, whether it is a comprehensive inspection of all blades of a single wind turbine or a random inspection strategy, the blades need to be frequently loaded, unloaded and positioned by lifting equipment. This process not only includes the precise opening and closing of the blade clamps and repeated calibration of the angle adjustment mechanism, but also requires the use of a laser positioning system to complete coordinate alignment. The operation steps are cumbersome and technically demanding. Since the blades are large thin-walled structural parts, they are prone to collisions, scratches and other damage during the lifting process, which poses a severe test to the operator's skills and equipment safety.

[0006] In addition, the time cost of the existing inspection mode remains high. After each blade inspection is completed, the inspected blade needs to be lifted out of the inspection area and the next blade needs to be lifted to the designated location. The process involves equipment recalibration, parameter adjustment and other links. A single blade replacement and equipment preparation can take up to tens of minutes. If multiple blades of a single wind turbine are inspected one by one, the cumulative time often exceeds several hours. This undoubtedly seriously restricts the inspection efficiency and production capacity improvement of wind turbine blades.

[0007] Especially in the large-scale production and operation and maintenance scenarios of wind turbine blades, the traditional detection model has become a key bottleneck hindering the development of the industry, and it is difficult to meet the market's urgent demand for rapid delivery and efficient maintenance of blades.

[0008] Moreover, frequent lifting operations and repeated equipment calibration will accelerate the wear and tear of lifting equipment and testing devices, increase equipment maintenance costs and downtime. At the same time, the long testing cycle also makes the testing link a critical path in the construction and operation and maintenance of wind power projects, delaying the overall progress of the project and increasing the overall cost of the project.

[0009] To this end, the present invention proposes a laser measuring device for blades of a wind turbine generator set. Summary of the Invention

[0010] The object of the present invention is to provide a laser measuring device for blades of a wind turbine generator set to solve the problems raised in the above background technology.

[0011] To achieve the above-mentioned object, the present invention provides the following technical solution: a laser measurement device for blades of a wind turbine generator set, comprising two laser measurement modules, at least two blade groups being installed on the outside of the two laser measurement modules, a column group being installed on the outside of the laser measurement module, the column group being used to support and positionally limit the laser measurement modules, a position switching member being installed on the outside of the column group, the position switching member being used to achieve position switching of the laser measurement modules; a plurality of linear guide rails being installed on the bottom of the laser measurement module, a slider being installed on the surface of each linear guide rail, a connecting member being installed between the top of the slider and the laser measurement module, the linear guide rails and the slider cooperating with each other, and under the action of the connecting member, the laser measurement module is moved along the direction of the linear guide rail;

[0012] Under the driving action of the linear guide rail and the limiting action of the position switching member, the connecting member drives the laser measurement module to perform all-round detection on at least two blade groups.

[0013] Preferably, the laser measurement module consists of a six-axis robot and a sliding guide rail, the end effector of the six-axis robot is integrated with a three-dimensional laser radar, the blade group consists of a fixture and wind turbine blades, and the bottom of the linear guide rail is flush with the ground.

[0014] Preferably, the column group includes: four first columns, which are arranged in a rectangular and equidistant manner and fixedly connected to the ground; two second columns, which are symmetrically fixedly connected to the ground; four groups of iron chains, one end of each group of iron chains is fixedly connected to the side wall of the second column, and the other end is fixedly connected to the side wall of the first column; the first column and the second column form a hexagonal structure, and the two second columns at the vertices are located in the feed direction of the linear guide rail, and the first column and the second column are fixedly connected to the bottom of the side close to the laser measurement module with reinforcing ribs.

[0015] Preferably, the position switching component includes: two transposition plates, each of which is fixedly connected between the two first columns; two transposition slots, each of which is opened through the surface of the transposition plate; and four transposition shafts, each of which is fixedly connected to both sides of the sliding guide rail, and the transposition shafts are slidably connected to the inside of the transposition slot.

[0016] Preferably, the transposition groove has a shape having left and right end straight segments and a middle straight segment, which are connected by a curved segment. The left and right end straight segments and the middle straight segment are parallel to each other, and the curved segment smoothly connects adjacent straight segments.

[0017] Preferably, the laser measurement module and the linear guide rail are both electrically connected to an external controller.

[0018] Preferably, the connecting member includes: a plurality of telescopic rods, which are fixedly connected to the top of the slider; and a plurality of sockets, which are fixedly connected to the top of the output end of the telescopic rod and fixedly connected to the sliding guide rail.

[0019] Preferably, the column group further includes two base plates, which are symmetrically fixedly connected between the two transposition plates, and the bottoms of the base plates are each provided with an upwardly concave arc groove, and the sliding guide rail is fixedly connected to the top of the base plates.

[0020] Preferably, the blade assembly is hoisted by an external hoisting device.

[0021] Preferably, the blade groups are arranged in plural numbers, with a minimum number of two, and the transposition slots on the transposition plate can be arranged in an integrated manner, that is, at least two transposition slots with left and right straight segments are integrated into one transposition plate, and the left and right straight segments of adjacent transposition slots overlap, thereby extending the limiting route of the laser measurement module.

[0022] Preferably, the three-dimensional laser radar adopts a linear array or area array scanning method to obtain point cloud data of the blade group; the base of the six-axis robot slides with the sliding guide rail, and the six-axis robot is driven by a servo motor and can perform linear displacement along the sliding guide rail to achieve multi-angle measurement of blade groups in different positions.

[0023] Preferably, the linear guide adopts a rack and pinion transmission system, including a rack guide fixed to the ground and a driving gear installed at the bottom of the slider, and the driving gear is connected to the output shaft of the servo motor; under long-distance measuring stroke and high-load conditions, the rack and pinion transmission system can still operate stably.

[0024] Preferably, the external lifting device includes a gantry crane or a cantilever crane, the hook of the crane is hinged to the clamp 121, and the crane also includes: two groups of symmetrically arranged arms, which are driven to open and close by hydraulic or electric actuators and are used to clamp the petiole part of the blade group; an angle adjustment mechanism, which includes a slewing bearing and a servo motor, and is used to adjust the pitch angle of the blade group to ensure that the blades maintain a horizontal or specific measurement posture during the lifting process; a laser positioning system, which is installed on the frame structure and is used to align coordinates with the laser measurement module to achieve precise lifting and positioning of the blade group.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Through the innovative collaborative design of position switching components and linear guides, the laser measurement module can continuously inspect multiple blade groups. The unique curved structure of the transposition groove and the transposition axis enable the measurement module to automatically switch between different blade positions, avoiding the cumbersome process of frequent disassembly and assembly of traditional single-station inspections.

[0027] For example, after completing the inspection of one blade group, the slider moves along the linear guide rail, and through the limit guidance of the transposition groove, the measurement module can accurately locate the next blade group, realizing a "seamless" inspection process. This design significantly reduces the equipment adjustment time and improves the multi-blade inspection efficiency by more than %, which is especially suitable for the batch inspection needs of wind power projects.

[0028] 2. The column group adopts a hexagonal frame structure, with four first columns and two second columns connected by iron chains to form a stable mechanical support system. This layout not only effectively disperses the gravity load of the blade group, but also prevents lateral deformation of the columns when subjected to force through tension balance of the iron chains. In addition, the concave design of the bottom plate further enhances the load-bearing capacity. Its upward concave arc structure can evenly distribute the weight of the blades to the ground. Compared with the traditional flat plate design, it can reduce material consumption while improving structural rigidity. This design greatly reduces manufacturing costs and installation difficulty while ensuring the stability of the device.

[0029] 3. Each component of the device adopts a modular design. For example, the laser measurement module, linear guide rails, and connectors can be independently removed and replaced. This design facilitates equipment maintenance and upgrades. For example, if the laser radar fails, the entire measurement module can be quickly replaced without disassembling the entire device. By overlapping the straight segments of multiple transposition slots, the measurement module's limit path is extended, allowing the device to adapt to the detection requirements of blades of different lengths, improving the device's versatility and adaptability.

[0030] 4. The non-enclosed structure design of the device reduces material consumption and manufacturing costs. At the same time, the gear rack transmission system used in the linear guide can remain stable under long-distance operation and high-load conditions, reducing the wear of transmission components and extending the service life of the equipment. The modular design makes the replacement and maintenance of each component more convenient, reducing maintenance costs and downtime.

[0031] 5. Multiple groups of blades are hoisted onto the base plate at one time through an external lifting device. The blade groups can be arranged in an orderly manner along the base plate, eliminating the need for repeated lifting and replacement after a single inspection. At this time, the laser measurement module, driven in coordination by the linear guide and the position switching component, automatically switches between different blade positions along a preset trajectory through the sliding of the transposition axis in the transposition slot. Whether it is multiple blades of the same wind turbine or blade groups from different batches, the two laser measurement modules can be moved to both sides of each blade in turn for all-round scanning and inspection. This design upgrades the traditional single-threaded operation of "one hoist, one inspection" to a parallel mode of "one hoist, multiple inspections", greatly reducing the frequency of use of lifting equipment and the time for blade loading and unloading. The inspection efficiency can be increased by several times, significantly reducing time and labor costs, and providing an efficient and stable solution for large-scale inspection of wind turbine blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a front perspective schematic diagram of the main structure of the present invention;

[0033] Figure 2 This is a frontal perspective schematic diagram of the main structure and blade assembly of the present invention after assembly;

[0034] Figure 3 It is a partial three-dimensional schematic diagram of the main structure of the present invention;

[0035] Figure 4 For the present invention Figure 3 A in the middle is an enlarged schematic diagram of the structure;

[0036] Figure 5 For the present invention Figure 3 The enlarged three-dimensional schematic diagram of the structure at B in the middle;

[0037] Figure 6 For the present invention Figure 3 The enlarged three-dimensional schematic diagram of the structure at C in the middle;

[0038] Figure 7 It is a partial three-dimensional schematic diagram of the position switching member of the present invention;

[0039] Figure 8 It is a three-dimensional schematic diagram of the transposition plate and transposition groove of the present invention;

[0040] Figure 9 This is a three-dimensional schematic diagram of the transposition groove after integration of the present invention;

[0041] Figure 10 It is a three-dimensional schematic diagram of the blade assembly of the present invention.

[0042] In the picture:

[0043] 11. Laser measurement module; 111. Six-axis robot; 112. Sliding guide rail; 113. LiDAR; 12. Blade assembly; 121. Fixture; 122. Wind turbine blade.

[0044] 21. Column group; 211. First column; 212. Second column; 213. Iron chain; 214. Bottom plate; 2141. Arc groove; 215. Reinforcement rib; 22. Position switching member; 221. Transposition plate; 222. Transposition groove; 2221. Straight segment; 2222. Curved segment; 223. Transposition shaft; 23. Linear guide rail; 231. Slider; 24. Connector; 241. Telescopic rod; 242. Socket. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] It should be noted that the laser measurement module 11 only provides the laser measurement function for the blade group 12, the linear guide rail 23 only provides the function of driving the laser measurement module 11 to move, and the external lifting device only provides the function of lifting the blade group 12. The working principle and specific structure of the above structure are both existing technologies. Therefore, in view of the versatility of the above structure, its specific principle will not be repeated later.

[0047] See also Figures 1 to 10The present invention provides an embodiment: a laser measuring device for blades of a wind turbine generator set, comprising two laser measuring modules 11, at least two blade groups 12 being installed on the outside of the two laser measuring modules 11, a column group 21 being installed on the outside of the laser measuring module 11, the column group 21 being used to support and limit the position of the laser measuring module 11, a position switching member 22 being installed on the outside of the column group 21, the position switching member 22 being used to achieve position switching of the laser measuring module 11; a plurality of linear guide rails 23 being installed on the bottom of the laser measuring module 11, a slider 231 being installed on the surface of each linear guide rail 23, a connecting member 24 being installed between the top of the slider 231 and the laser measuring module 11, the linear guide rails 23 and the slider 231 cooperating with each other, and under the action of the connecting member 24, the laser measuring module 11 is moved along the direction of the linear guide rail 23;

[0048] Under the driving action of the linear guide rail 23 and the limiting action of the position switching member 22 , the connecting member 24 drives the laser measurement module 11 to perform all-round detection on at least two blade groups 12 .

[0049] It should be noted that the laser measurement module 11 is composed of a six-axis robot 111 and a sliding guide rail 112. The end effector of the six-axis robot 111 is integrated with a three-dimensional laser radar 113. The blade group 12 is composed of a clamp 121 and a wind turbine blade 122. The bottom of the linear guide rail 23 is flush with the ground. The column group 21 includes: four first columns 211, which are arranged in a rectangular and equidistant manner and fixedly connected to the ground; two second columns 212, which are symmetrically fixedly connected to the ground; four groups of iron chains 213, one end of the four groups of iron chains 213 is respectively fixedly connected to the side wall of the second column 212, and the other end is respectively fixedly connected to the side wall of the first column 211; the first The columns 211 and the second columns 212 form a hexagonal structure, and the two second columns 212 at the vertices are located in the feed direction of the linear guide rail 23. The first column 211 and the second column 212 are fixedly connected to the bottom of the side close to the laser measurement module 11 with a reinforcing rib 215. The position switching member 22 includes: two transposition plates 221, each transposition plate 221 is fixedly connected between the two first columns 211; two transposition grooves 222, the transposition grooves 222 are all through the surface of the transposition plate 221; four transposition shafts 223, each two transposition shafts 223 are fixedly connected to the two sides of the sliding guide rail 112, and the transposition shafts 223 are all slidably connected to the inside of the transposition groove 222, and the transposition groove 222 is It has a shape with left and right end straight segments 2221 and a middle straight segment 2221, and is connected by a curved segment 2222. The left and right end straight segments 2221 and the middle straight segment 2221 are parallel to each other, and the curved segment 2222 smoothly connects the adjacent straight segments 2221. The laser measurement module 11 and the linear guide rail 23 are both electrically connected to the external controller. The connector 24 includes: a plurality of telescopic rods 241, and the telescopic rods 241 are all fixedly connected to the top of the slider 231; a plurality of receiving seats 242, and the receiving seats 242 are all fixedly connected to the top of the output end of the telescopic rod 241 and are fixedly connected to the sliding guide rail 112. The column group 21 also includes two bottom plates 214, and the two bottom plates 214 are symmetrically fixedly connected to the two Between the transposition plates 221, the bottom of the bottom plate 214 is provided with an upwardly concave arc groove 2141, the sliding guide rail 112 is fixedly connected to the top of the bottom plate 214, and the blade group 12 is hoisted by an external lifting device. The blade group 12 is provided in plural numbers, with a minimum of two. The transposition grooves 222 on the transposition plate 221 can be integrated, that is, at least two transposition grooves 222 with left and right straight segments 2221 are integrated on one transposition plate 221, and the left and right straight segments 2221 of adjacent transposition grooves 222 overlap, thereby extending the limit route of the laser measurement module 11, and the three-dimensional laser radar 113 adopts a linear array or area array scanning method to obtain point cloud data of the blade group 12;The base of the six-axis robot 111 is slidably matched with the sliding guide rail 112, and the six-axis robot 111 is driven by a servo motor and can move linearly along the sliding guide rail 112 to achieve multi-angle measurement of the blade group 12 at different positions. The linear guide rail 23 adopts a gear rack transmission system, including a rack guide rail fixed to the ground and a driving gear installed at the bottom of the slider 231. The driving gear is connected to the output shaft of the servo motor; under long-distance measurement strokes and large load conditions, the gear rack transmission system can still operate stably. The external lifting device includes a gantry crane or a cantilever crane. The crane has a hook hingedly connected to the clamp 121. The crane also includes two symmetrically arranged arms, which are driven to open and close by hydraulic or electric actuators and are used to clamp the petioles of the blade assembly 12; an angle adjustment mechanism, which includes a slewing bearing and a servo motor, and is used to adjust the pitch angle of the blade assembly 12 to ensure that the blades remain horizontal or in a specific measurement posture during the lifting process; and a laser positioning system, which is installed on the frame structure and is used to align coordinates with the laser measurement module 11 to achieve precise lifting and positioning of the blade assembly 12.

[0050] Specifically, several blade assemblies 12 are precisely hoisted to the measuring station by an external hoisting device, such as a gantry crane or a cantilever crane.

[0051] After the positioning of the blade group 12 is completed, the laser measurement module 11 starts working immediately, and the six-axis robot 111 performs a full-scale scan of the blade group 12 through a linear array or area array scanning method to obtain high-precision point cloud data, thereby achieving accurate measurement of the initial state of the blade group 12.

[0052] After completing the measurement of a blade group 12, the linear guide 23 cooperates with the position switching component 22 to push the laser measurement module 11 to move to the next measurement station. The servo motor drives the driving gear at the bottom of the slider 231, driving the slider 231 to move along the rack guide, and then through the telescopic rod 241 and the receiving seat 242 of the connecting component 24, pushes the laser measurement module 11 to translate along the linear guide 23.

[0053] During the movement of the laser measurement module 11, the transposition groove 222 and the transposition shaft 223 of the position switching member 22 play an important role in limiting and guiding.

[0054] The transposition shaft 223 is slidably connected to the inside of the transposition groove 222. Due to the unique shape design of the transposition groove 222, which is connected by the straight segments 2221 at the left and right ends, the middle straight segment 2221 and the curved segment 2222, when the slider 231 drives the laser measurement module 11 to move, the transposition shaft 223 will transition from the straight segment 2221 of the transposition groove 222 to the curved segment 2222.

[0055] During this process, the telescopic rod 241 of the connecting member 24 will be forced to compress due to the limit constraint, so that the laser measurement module 11 is at the lowest position when it transitions to the curved segment 2222, and then gradually rises to the highest position of the straight segment 2221 on the other side. Since the two laser measurement modules 11 move synchronously, after completing the above movement, the two laser measurement modules 11 are located on the left and right sides of the next blade group 12, so that it can be fully detected. By repeating the above steps, continuous and efficient measurement of multiple blade groups 12 can be achieved.

[0056] It should be noted that, given the large size of the blade assembly 12, if a closed structure is adopted, the column assembly 21 and the position switching member 22 of the supporting platform will require a large amount of material, which will significantly increase the cost;

[0057] The non-enclosed structure of the column assembly 21 and the position switching member 22 effectively reduces material usage and lowers manufacturing costs. In addition, the design of the bottom plate 214 cleverly utilizes mechanical principles. Its upwardly concave arc-shaped groove 2141 can naturally disperse and resist the weight of the blade assembly 12, thereby enhancing the stability of the load-bearing platform.

[0058] In the column group 21, the four first columns 211 are arranged in a rectangular shape at the four corners of the blade group 12. Under the action of gravity of the blade group 12, the first columns 211 tend to deform toward the blade group 12, and the design of the iron chain 213 and the transposition groove 222 effectively avoids this situation. When the first column 211 tends to deform, the iron chain 213 will exert tension on it, limiting the occurrence of deformation, thereby ensuring the structural stability and measurement accuracy of the entire measuring device during operation.

[0059] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A laser measuring device for blades of a wind turbine generator set, comprising two laser measuring modules (11), at least two blade groups (12) being mounted on the outside of the two laser measuring modules (11), characterized in that: The laser measurement module (11) is externally mounted with a column group (21), the column group (21) being used to support and positionally limit the laser measurement module (11), and the column group (21) being externally mounted with a position switching member (22), the position switching member (22) being used to achieve position switching of the laser measurement module (11); a plurality of linear guide rails (23) being mounted on the bottom of the laser measurement module (11), a slider (231) being mounted on the surface of each linear guide rail (23), a connecting member (24) being mounted between the top of the slider (231) and the laser measurement module (11), the linear guide rail (23) and the slider (231) being coordinated with each other, and under the action of the connecting member (24), the laser measurement module (11) is moved along the direction of the linear guide rail (23), and the laser measurement module (11) is composed of a six-axis robot (111) and a sliding guide rail (112); Under the driving action of the linear guide rail (23) and the limiting action of the position switching member (22), the connecting member (24) drives the laser measurement module (11) to perform all-round detection on at least two blade groups (12); The position switching member (22) comprises: two transposition plates (221), each of the transposition plates (221) being fixedly connected between two first upright posts (211) of the upright post group; two transposition slots (222), each of the transposition slots (222) being opened through the surface of the transposition plates (221); and four transposition shafts (223), each of two transposition shafts (223) being fixedly connected to both sides of the sliding guide rail (112), and each of the transposition shafts (223) being slidably connected to the interior of the transposition slots (222); The transposition groove (222) is shaped to have left and right end straight segments (2221) and a middle straight segment (2221), which are connected by a curved segment (2222). The left and right end straight segments (2221) and the middle straight segment (2221) are parallel to each other, and the curved segment (2222) smoothly connects adjacent straight segments (2221). The connecting member (24) includes: a plurality of telescopic rods (241), each of the telescopic rods (241) being fixedly connected to the top of the slider (231); and a plurality of receiving seats (242), each of the receiving seats (242) being fixedly connected to the top of the output end of the telescopic rod (241) and fixedly connected to the sliding guide rail (112).

2. The laser measuring device for wind turbine blades according to claim 1, characterized in that: The end effector of the six-axis robot (111) is integrated with a three-dimensional laser radar (113); the blade assembly (12) is composed of a fixture (121) and wind turbine blades (122); and the bottom of the linear guide rail (23) is flush with the ground.

3. The laser measuring device for wind turbine blades according to claim 2, characterized in that: The column group (21) comprises: four first columns (211), the four first columns (211) being arranged in a rectangular and equidistant manner and fixedly connected to the ground; two second columns (212), the two second columns (212) being symmetrically fixedly connected to the ground; four groups of iron chains (213), one end of each of the four groups of iron chains (213) being fixedly connected to the side wall of the second column (212), and the other end being fixedly connected to the side wall of the first column (211); the first column (211) and the second column (212) forming a hexagonal structure, and the two second columns (212) located at the vertices are located in the feeding direction of the linear guide rail (23); and the bottom of each of the first column (211) and the second column (212) close to the laser measurement module (11) is fixedly connected to a reinforcing rib (215).

4. The laser measuring device for wind turbine blades according to claim 1, characterized in that: The laser measurement module (11) and the linear guide rail (23) are both electrically connected to an external controller.

5. The laser measuring device for wind turbine blades according to claim 1, characterized in that: The column group (21) further comprises two bottom plates (214), the two bottom plates (214) being symmetrically fixedly connected between the two transposition plates (221), and the bottoms of the bottom plates (214) are each provided with an upwardly concave arc groove (2141).

6. The laser measuring device for wind turbine blades according to claim 1, characterized in that: The blade assembly (12) is hoisted by an external hoisting device.

7. The laser measuring device for wind turbine blades according to claim 1, characterized in that: The blade groups (12) are arranged in plural numbers, with a minimum number of two. The transposition slots (222) on the transposition plate (221) are arranged in an integrated manner, that is, at least two transposition slots (222) having left and right end straight sections (2221) are integrated on one transposition plate (221), and the left and right end straight sections (2221) of adjacent transposition slots (222) overlap, thereby extending the limiting route of the laser measurement module (11).

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