A wind turbine blade length measurement and positioning system, measurement method and positioning method

Abstract

The present invention provides a wind turbine blade length measurement and positioning system, a measurement method and a positioning method. The measurement system includes a base, a control system, a blade root measurement component and a blade tip measurement component. The control system is fixedly arranged on the base. The blade root measurement component and the blade tip measurement component are movably arranged on the base along the length direction. The blade root measurement component and the blade tip measurement component can rise close to or fall away from the wind turbine blade. The present invention can improve the accuracy of wind turbine blade length measurement by setting the blade root measurement component and the blade tip measurement component. The position of a specific length on the outer surface of the blade can be conveniently and accurately positioned by setting the middle measurement component, saving the time and accuracy of positioning the specific mark on the blade surface. By setting the retractable base, the length measurement and positioning system provided by the present invention is universal for all blade types and can be used for length measurement of wind turbine blades of different specifications and lengths and positioning of specific length positions on the outer surface.

Description

Technical Field

[0001] The present invention relates to the technical field of post-processing of non-metal composite material wind turbine blades, and in particular to a wind turbine blade length measurement and positioning system, a measurement method and a positioning method. Background Art

[0002] In recent years, the installed capacity of wind turbines has increased year by year around the world. Glass fiber composite wind turbine blades are one of the most critical components of wind turbines, and blade length is an important indicator that affects the performance of wind turbine blades. For wind turbine blades connected by T-bolts at the root, the root needs to be cut after the blades are formed to control the blade length within the length range required by the design. A wind turbine blade length greater than the theoretical upper limit of the design may cause the blade to be too heavy, and a wind turbine blade length shorter than the theoretical lower limit of the design may affect the power generation of the blade. In addition, after the anti-corrosion coating on the surface of the wind turbine blade is completed, it is necessary to mark the blade hoisting mark, transportation mark or other safety mark on the specific area of ​​the outer surface of the blade at a specific length to facilitate accurate finding of the blade hoisting area, transportable area and other specific length positions. At present, the common practice is to use a tape measure for manual measurement, which is not only time-consuming and inaccurate, but also prone to measurement and positioning deviations. Summary of the invention

[0003] The problem solved by the present invention is that, in the prior art, the length measurement of wind turbine blades and the positioning of specific areas are manually measured by a tape measure, which has low measurement efficiency and is prone to measurement and positioning deviations, and the measurement accuracy is not high.

[0004] The present invention discloses a wind turbine blade length measurement and positioning system, which is used for measuring the length of wind turbine blades and comprises: a base, a control system, a blade root measurement component and a blade tip measurement component. The control system is fixedly arranged on the base, and the blade root measurement component and the blade tip measurement component are movably arranged on the base along the length direction. The blade root measurement component and the blade tip measurement component can rise close to or fall away from the wind turbine blade.

[0005] This setting makes the measurement result more accurate and greatly improves the measurement accuracy of the wind turbine blade length.

[0006] Furthermore, the blade root measurement assembly includes a blade root measurement base, a blade root measurement telescopic rod and a blade root measurement plate, the blade root measurement base is movably connected to the base, one end of the blade root measurement telescopic rod is connected to the blade root measurement base, and the other end is connected to the blade root measurement plate, the blade root measurement telescopic rod is telescopically movable relative to the blade root measurement base, and a first sensor is arranged on a side of the blade root measurement plate facing the wind turbine blade.

[0007] The first sensor is used to measure the distance between the blade root measurement plate and the wind turbine blade, thereby controlling the extension and retraction of the blade root measurement telescopic rod, so that the blade root measurement plate rises closer to or falls away from the wind turbine blade, so as to facilitate accurate marking on the wind turbine blade.

[0008] Furthermore, the blade tip measurement assembly includes a blade tip measurement base, a blade tip measurement telescopic rod and a blade tip measurement positioning panel, the blade tip measurement base is movably connected to the base, one end of the blade tip measurement telescopic rod is connected to the blade tip measurement base, and the other end is connected to the blade tip measurement positioning panel, the blade tip measurement telescopic rod is telescopically movable relative to the blade tip measurement base, and a second sensor is arranged on a side surface of the blade tip measurement positioning panel facing the blade root measurement assembly.

[0009] The second sensor is used to detect the distance between the blade tip measurement and positioning panel and the blade tip of the wind turbine blade, so as to accurately position the blade tip of the wind turbine blade, facilitating smooth subsequent measurement.

[0010] Furthermore, a third sensor is arranged on the top of the blade tip measurement and positioning panel.

[0011] The third sensor is used to detect whether there is an object within a second preset distance range above it. According to the detection result, the blade tip measurement base can be controlled to move in the length direction to avoid the top of the blade tip measurement positioning panel from abutting against the wind turbine blade, affecting the accurate detection of the length of the wind turbine blade.

[0012] Furthermore, the base can be telescopically arranged in the length direction.

[0013] This arrangement enables the measurement and positioning system to also meet the requirements of length measurement and / or positioning of wind turbine blades of different models and specifications, thereby providing it with greater measurement flexibility and reducing the cost consumption required to prepare corresponding measurement systems for different wind turbine blades.

[0014] Furthermore, it also includes a middle measurement component, which is movably arranged on the base along the length direction, and the middle measurement component can rise to approach or fall away from the wind turbine blade.

[0015] The middle measurement component is used for positioning a specific area on a wind turbine blade.

[0016] Furthermore, there are more than two middle measurement components, wherein at least one middle measurement component is arranged between the control system and the blade root measurement component, and at least one middle measurement component is arranged between the control system and the blade tip measurement component.

[0017] The positioning of specific areas at different positions is carried out by using the middle measurement components arranged in different areas, so as to realize the positioning of specific areas along the entire length of the wind turbine blade.

[0018] Furthermore, the middle measuring assembly includes a middle measuring telescopic rod and a middle measuring base, the middle measuring base is movably connected to the base, one end of the middle measuring telescopic rod is connected to the middle measuring base, and the other end is provided with a fourth sensor.

[0019] The fourth sensor is used to detect the distance between the upper wind turbine blade and the middle measuring telescopic rod, thereby controlling the extension and retraction of the middle measuring telescopic rod, so that the top end of the middle measuring telescopic rod rises closer to or falls away from the wind turbine blade, so as to facilitate accurate marking on the wind turbine blade.

[0020] The present invention also discloses a method for measuring the length of a wind turbine blade, which uses the length measurement system as described above and comprises the following steps:

[0021] Step S1: placing a wind turbine blade on a blade root support and a blade tip support;

[0022] Step S2: arranging the base on the lower side of the wind turbine blade along the length direction of the wind turbine blade;

[0023] Step S3: stretching the base so that both ends of the base in the length direction respectively exceed the blade root and the blade tip of the wind turbine blade;

[0024] Step S4: placing the control system on a base;

[0025] Step S5: placing the blade root measurement component on the base and placing it close to the blade root of the wind turbine blade; placing the blade tip measurement component on the base and placing it close to the blade tip of the wind turbine blade;

[0026] Step S6: Move the blade tip measurement assembly to a position beyond the tip of the wind turbine blade through the control system; then extend the blade tip measurement telescopic rod through the control system; when the blade tip of the wind turbine blade is within the height range of the blade tip measurement positioning panel, control the blade tip measurement telescopic rod to stop extending through the control system, and control the blade tip measurement positioning panel to move toward the blade tip; when the second sensor detects that the distance between the blade tip measurement positioning panel and the blade tip of the wind turbine blade is within a third preset distance, the blade tip measurement assembly stops moving, and the control system measures and records the distance A between the control system and the blade tip measurement assembly;

[0027] Step S7: the control system calculates the required distance B=LA between the control system and the blade root measurement assembly according to the design length L of the wind turbine blade and the value of A; the control system moves the blade root measurement assembly to a position at a distance B from the control system; the control system extends the blade root measurement telescopic rod, and when the first sensor on the blade root measurement telescopic rod detects that the distance to the outer surface of the wind turbine blade is within a first preset distance, the blade root measurement telescopic rod stops extending, and the position of the blade root measurement template corresponding to the wind turbine blade is the position of the blade root end face in the design, and the root end face position is marked on the outer surface of the wind turbine blade;

[0028] Step S8: Perform root cutting along the root end surface marked on the wind turbine blade to make the wind turbine blade reach the theoretical design length.

[0029] By setting the above steps, the position of the root end face of the wind turbine blade can be accurately determined, so that the root can be cut, and the accurate measurement and control of the length of the wind turbine blade can be achieved, meeting the design requirements.

[0030] The present invention also discloses a method for locating the length of a wind turbine blade, which uses the length measurement system as described above and comprises the following steps:

[0031] Step S1: placing a wind turbine blade on a blade root support and a blade tip support;

[0032] Step S2: arranging the base on the lower side of the wind turbine blade along the length direction of the wind turbine blade;

[0033] Step S3: stretching the base so that both ends of the base in the length direction respectively exceed the blade root and the blade tip of the wind turbine blade;

[0034] Step S4: placing the control system on a base;

[0035] Step S5: a blade root measurement assembly is arranged on a base, and is close to the blade root of the wind turbine blade, and a middle measurement assembly is arranged between the blade root measurement assembly and the control system, and the middle measurement assembly is recorded as a first measurement assembly; a blade tip measurement assembly is arranged on a base, and is close to the blade tip of the wind turbine blade, and another middle measurement assembly is arranged between the blade tip measurement assembly and the control system, and the middle measurement assembly is recorded as a second measurement assembly;

[0036] Step S6: Move the blade tip measurement assembly to a position beyond the tip of the wind turbine blade through the control system; then extend the blade tip measurement telescopic rod through the control system; when the blade tip of the wind turbine blade is within the height range of the blade tip measurement positioning panel, control the blade tip measurement telescopic rod to stop extending through the control system, and control the blade tip measurement positioning panel to move toward the blade tip; when the second sensor detects that the distance between the blade tip measurement positioning panel and the blade tip of the wind turbine blade is within a third preset distance, the blade tip measurement assembly stops moving, and the control system measures and records the distance A between the control system and the blade tip measurement assembly;

[0037] Step S7: The control system calculates the required distance E=LAD between the control system and the middle measuring component according to the length D of the specific area position, the length L of the wind turbine blade, and the value of A; the positive or negative value of E is judged. When E is a positive value, E represents the distance between the first measuring component and the control system. The control system moves the first measuring component to a position at a distance E from the control system, so that the middle measuring telescopic rod of the first measuring component is extended. When the fourth sensor on the middle measuring telescopic rod detects that the distance to the outer surface of the wind turbine blade is within a fourth preset distance, the middle measuring telescopic rod stops extending, and the corresponding position is the target position; when E is a negative value, E represents the distance between the second measuring component and the control system. The control system moves the second measuring component to a position at a distance E from the control system, so that the middle measuring telescopic rod of the second measuring component is extended. When the fourth sensor on the middle measuring telescopic rod detects that the distance to the outer surface of the wind turbine blade is within a fourth preset distance, the middle measuring telescopic rod stops extending, and the corresponding position is the target position;

[0038] Step S8: Draw a corresponding specific area mark at the target position of the wind turbine blade.

[0039] By setting the above steps, the specific area on the wind turbine blade that needs to be marked can be accurately found. The operation process is simple and convenient, and the positioning is accurate, which greatly improves the safety of the wind turbine blade during transportation and handling.

[0040] Compared with the prior art, the wind turbine blade length measurement and positioning system, measurement method and positioning method described in the present invention have the following advantages:

[0041] 1) The length measurement system of the present invention can improve the accuracy of wind turbine blade length measurement;

[0042] 2) The length measurement system of the present invention can conveniently and accurately locate the position of a specific length on the outer surface of the blade, saving time and accuracy in locating specific marks on the blade surface.

[0043] 3) The length measurement and positioning system provided by the present invention is universal for all blade types and can be used to measure the lengths of wind turbine blades of different specifications and lengths and to position specific length positions on the outer surface by adjusting the length of the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the overall structure of the wind turbine blade length measurement and positioning system in application according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of a wind turbine blade length measurement and positioning system according to an embodiment of the present invention;

[0046] Figure 3 It is a structural schematic diagram of a base according to an embodiment of the present invention;

[0047] Figure 4 It is a structural schematic diagram of a control system according to an embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of a blade root measurement assembly according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of the structure of a blade tip measurement assembly according to an embodiment of the present invention;

[0050] Figure 7 It is a schematic structural diagram of the middle measurement component described in an embodiment of the present invention.

[0051] Description of reference numerals:

[0052] 1. Length measurement and positioning system; 10. Base; 11. Control system; 110. Control button; 12. Blade root measurement assembly; 120. Blade root measurement template; 1201. First sensor; 121. Blade root measurement base; 122. Blade root measurement telescopic rod; 13. Blade tip measurement assembly; 130. Blade tip measurement positioning panel; 1301. Second sensor; 1302. Third sensor; 131. Blade tip measurement base; 132. Blade tip measurement telescopic rod; 14. Middle measurement assembly; 140. Middle measurement telescopic rod; 1401. Fourth sensor; 141. Middle measurement base; 2. Wind turbine blade; 3. Blade root bracket; 4. Blade tip bracket. DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0054] A wind turbine blade length measurement and positioning system, measurement method and positioning method according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0055] Example 1

[0056] This embodiment provides a wind turbine blade length measurement and positioning system. Figure 1 , Figure 2 , Figure 3 As shown, the length measurement and positioning system 1 is used for measuring the length of a wind turbine blade 2, and includes: a base 10, a control system 11, a blade root measurement component 12 and a blade tip measurement component 13. The control system 11 is fixedly arranged on the base 10, and the blade root measurement component 12 and the blade tip measurement component 13 are movably arranged on the base 10 along the length direction. The blade root measurement component 12 and the blade tip measurement component 13 can rise close to or fall away from the wind turbine blade 2. In the prior art, after the wind turbine blade 2 is produced, its actual length is often greater than the designed length, and its root needs to be cut to make it reach the theoretical designed length. The specific cutting position is limited by the accuracy of the wind turbine blade 2 length detection, and the wind turbine blade 2 is prone to be too long or too short. In this embodiment, the blade tip measurement component 13 is first moved along the length direction so that the position of the blade tip measurement component 13 corresponds to the tip part of the wind turbine blade 2, and then the theoretical distance B=LA between the control system 11 and the blade root measurement component 12 can be calculated through the distance A between the control system 11 and the blade tip measurement component 13, and the designed length L of the wind turbine blade 2. The distance between the blade root measurement component 12 and the control system 11 is adjusted according to the value of B, so that the corresponding blade root end surface position can be found, and the wind turbine blade 2 of the designed length can be obtained by cutting according to this position. In addition, by setting the blade root measurement component 12 and the blade tip measurement component 13 to rise closer to and descend away from the wind turbine blade 2, they are closer to the wind turbine blade 2 when measuring the distance, so that the measurement result is more accurate, which greatly improves the measurement accuracy of the length of the wind turbine blade 2.

[0057] As one of the preferred embodiments, it further comprises a middle measurement component 14 , which is movably disposed on the base 10 along the length direction, and the middle measurement component 14 can rise to approach or fall away from the wind turbine blade 2 . After the anti-corrosion coating on the surface of the wind turbine blade 2 is completed, it is necessary to mark the blade hoisting mark, transportation mark or other safety mark on the specific area of ​​the outer surface of the blade of a specific length, so as to accurately find the blade hoisting area, transportable area and other specific length positions. The middle measurement component 14 is used to locate the specific area on the wind turbine blade 2. First, the tip measurement component 13 is moved along the length direction so that the tip measurement component 13 corresponds to the position of the tip part of the wind turbine blade 2. Then, the distance A between the control system 11 and the tip measurement component 13, the length L of the wind turbine blade 2 and the length D of the specific area position can be calculated. The distance E=LAD between the control system 11 and the middle measurement component 14 can be calculated according to the positive or negative value of E. It is judged that the middle measurement component 14 is closer to the root position or the tip position of the wind turbine blade 2, and the position of the middle measurement component 14 is adjusted according to the above situation, so as to determine the position of the specific area to be located. The setting that the middle measurement component 14 can rise close to or fall away from the wind turbine blade 2 facilitates accurate positioning of the specific area and helps to accurately calibrate the surface of the wind turbine blade 2. The specific area position length D refers to the distance between the specific area and the root end surface of the wind turbine blade 2 .

[0058] As an optional embodiment, there are more than two middle measurement components 14, wherein at least one middle measurement component 14 is arranged between the control system 11 and the blade root measurement component 12, and at least one middle measurement component 14 is arranged between the control system 11 and the blade tip measurement component 13. When the E value is a positive value, the middle measurement component 14 arranged between the control system 11 and the blade root measurement component 12 is used for corresponding positioning; when the E value is a negative value, the middle measurement component 14 arranged between the control system 11 and the blade tip measurement component 13 is used for corresponding positioning, thereby realizing the positioning of a specific area of ​​the entire length of the wind turbine blade 2.

[0059] As an optional embodiment, Figure 5As shown, the blade root measurement assembly 12 includes a blade root measurement base 121, a blade root measurement telescopic rod 122 and a blade root measurement template 120. The blade root measurement base 121 is movably connected to the base 10. One end of the blade root measurement telescopic rod 122 is connected to the blade root measurement base 121, and the other end is connected to the blade root measurement template 120. The blade root measurement telescopic rod 122 can be telescopically moved relative to the blade root measurement base 121. A first sensor 1201 is provided on the side of the blade root measurement template 120 facing the wind turbine blade 2. The first sensor 1201 is used to measure the distance between the blade root measurement template 120 and the wind turbine blade 2, so as to control the extension and retraction of the blade root measurement telescopic rod 122, so that the blade root measurement template 120 rises close to or falls away from the wind turbine blade 2, so as to facilitate accurate marking on the wind turbine blade 2. In one embodiment, when the blade root measurement telescopic rod 122 is extended, the blade root measurement template 120 rises and approaches the wind turbine blade 2. When the first sensor 1201 detects that there is an object within the first preset distance above it, the blade root measurement telescopic rod 122 stops extending, indicating that the blade root measurement template 120 has approached the wind turbine blade 2 and a corresponding marking operation can be performed; when the blade root measurement telescopic rod 122 is shortened, it can be completely retracted into the inside of the blade root measurement base 121, and at this time, the blade root measurement telescopic rod 122 stops shortening. In some optional embodiments, the first sensor 1201 is an inductive sensor, and the inductive sensor is attached to the side of the blade root measurement template 120 close to the wind turbine blade 2. As one embodiment, the blade root measurement template 120 is an arc plate, the structure of the arc plate is adapted to the outer surface shape of the root position of the wind turbine blade 2, and the inductive sensor is attached to the arc inner surface of the arc plate. Optionally, the first preset distance is: within 1 mm.

[0060] As some optional embodiments, Figure 6As shown, the blade tip measurement assembly 13 includes a blade tip measurement base 131, a blade tip measurement telescopic rod 132 and a blade tip measurement positioning panel 130, the blade tip measurement base 131 is movably connected to the base 10, one end of the blade tip measurement telescopic rod 132 is connected to the blade tip measurement base 131, and the other end is connected to the blade tip measurement positioning panel 130, the blade tip measurement telescopic rod 132 is telescopically movable relative to the blade tip measurement base 131, a third sensor 1302 is arranged on the top of the blade tip measurement positioning panel 130, and a second sensor 1301 is arranged on a side surface of the blade tip measurement positioning panel 130 facing the blade root measurement assembly 12. The third sensor 1302 is used to detect whether there is an object within a second preset distance range above it, and control the blade tip measurement base 131 to move in the length direction according to the detection result, so as to avoid the top of the blade tip measurement positioning panel 130 from abutting against the wind turbine blade 2, thereby affecting the accurate detection of the length of the wind turbine blade 2; the second sensor 1301 is used to detect the distance between the blade tip measurement positioning panel 130 and the blade tip of the wind turbine blade 2, so as to accurately locate the blade tip of the wind turbine blade 2, so as to facilitate the smooth progress of subsequent measurements. When the third sensor 1302 detects that there is no object within the second preset range above it, the blade tip measurement telescopic rod 132 extends, raises the blade tip measurement positioning panel 130 to a position close to the height of the blade tip of the wind turbine blade 2, and then moves it toward the root of the wind turbine blade 2. When the second sensor 1301 detects that there is an object within the third preset distance, the blade tip measurement positioning panel 130 stops moving, and the control system 11 detects the distance A between the blade tip measurement component 13 and the control system 11, and measures and / or locates the length of the wind turbine blade 2. In one embodiment, when the third sensor 1302 detects that there is an object within the second preset distance above it, the blade tip measurement telescopic rod 132 stops extending, and the blade tip measurement base 131 moves away from the blade root measurement component 12. When it is detected that there is no object within the second preset distance range above it, the blade tip measurement base 131 stops moving, the blade tip measurement telescopic rod 132 extends, so that the blade tip measurement positioning panel 130 rises to the same height as the blade tip, the blade tip measurement telescopic rod 132 stops extending, and the blade tip measurement base 131 moves toward the blade root measurement component 12. When the second sensor 1301 detects that there is an object within the third preset distance, the blade tip measurement base 131 stops moving, and the control system 11 detects the distance A between the blade tip measurement component 13 and the control system 11, and measures and / or locates the length of the wind turbine blade 2. In some optional embodiments, the second sensor 1301 is a length sensing sensor, and the third sensor 1302 is a height sensing sensor. Optionally, the second preset distance is 300m, and the third preset distance is 1mm.It should be understood that two second sensors 1301 may be provided, respectively provided on two sides of the blade tip measurement positioning panel 130 close to or far from the blade root measurement assembly 12 .

[0061] As an embodiment of the present invention, Figure 7 As shown, the middle measurement assembly 14 includes a middle measurement telescopic rod 140 and a middle measurement base 141, the middle measurement base 141 is movably connected to the base 10, one end of the middle measurement telescopic rod 140 is connected to the middle measurement base 141, and the other end is provided with a fourth sensor 1401. The fourth sensor 1401 is used to detect the distance between the wind turbine blade 2 on its upper side and the middle measurement telescopic rod 140, so as to control the extension and retraction of the middle measurement telescopic rod 140, so that the top end of the middle measurement telescopic rod 140 rises close to or falls away from the wind turbine blade 2, so as to facilitate accurate marking on the wind turbine blade 2. In one embodiment, when the middle measuring telescopic rod 140 is extended, the top of the middle measuring telescopic rod 140 rises close to the wind turbine blade 2. When the fourth sensor 1401 detects an object within a fourth preset distance above it, the middle measuring telescopic rod 140 stops extending, indicating that the top of the middle measuring telescopic rod 140 is close to the wind turbine blade 2, and a corresponding marking operation can be performed; when the middle measuring telescopic rod 140 is shortened, it can be completely retracted into the middle measuring base 141, at which time, the middle measuring telescopic rod 140 stops shortening. In some optional embodiments, the fourth sensor 1401 is a height sensing sensor, which is attached to the top of the middle measuring telescopic rod 140. Optionally, the fourth preset distance is: within 1 mm.

[0062] As one of the preferred embodiments, the base 10 is retractable in the length direction. This configuration enables the measurement and positioning system to meet the length measurement and / or positioning of wind turbine blades 2 of different models and specifications, thereby providing it with greater measurement flexibility and reducing the cost consumption required for preparing corresponding measurement systems for different wind turbine blades 2.

[0063] Example 2

[0064] This embodiment provides a method for measuring the length of a wind turbine blade, which is used in the length measurement system described in Embodiment 1.

[0065] The length measurement method comprises the following steps:

[0066] Step S1: placing the wind turbine blade 2 on the blade root support 3 and the blade tip support 4;

[0067] Step S2: arranging the base 10 on the lower side of the wind turbine blade 2 along the length direction of the wind turbine blade 2;

[0068] Step S3: stretching the base 10 so that both ends of the base 10 in the length direction respectively exceed the blade root and blade tip of the wind turbine blade 2;

[0069] Step S4: placing the control system 11 on the base 10;

[0070] Step S5: placing the blade root measurement component 12 on the base 10 and placing it close to the blade root of the wind turbine blade 2; placing the blade tip measurement component 13 on the base 10 and placing it close to the blade tip of the wind turbine blade 2;

[0071] Step S6: Move the blade tip measurement assembly 13 to a position beyond the tip of the wind turbine blade 2 through the control system 11; then extend the blade tip measurement telescopic rod 132 through the control system 11; when the blade tip of the wind turbine blade 2 is within the height range of the blade tip measurement positioning panel 130, control the blade tip measurement telescopic rod 132 to stop extending through the control system 11, and control the blade tip measurement positioning panel 130 to move toward the blade tip; when the second sensor 1301 detects that the distance between the blade tip measurement positioning panel 130 and the blade tip of the wind turbine blade 2 is within a third preset distance, the blade tip measurement assembly 13 stops moving, and the control system 11 measures and records the distance A between the control system 11 and the blade tip measurement assembly 13;

[0072] Step S7: the control system 11 calculates the required distance B=LA between the control system 11 and the blade root measurement assembly 12 according to the design length L of the wind turbine blade 2 and the value of A; the control system 11 moves the blade root measurement assembly 12 to a position at a distance B from the control system 11; the control system 11 extends the blade root measurement telescopic rod 122, and when the first sensor 1201 on the blade root measurement telescopic rod 122 detects that the distance to the outer surface of the wind turbine blade 2 is within a first preset distance, the blade root measurement telescopic rod 122 stops extending, and the position of the blade root measurement template 120 corresponding to the wind turbine blade 2 is the position of the blade root end face in the design, and the root end face position of the wind turbine blade 2 is marked on the outer surface of the wind turbine blade 2;

[0073] Step S8: performing root cutting along the root end surface marked on the wind turbine blade 2 so that the wind turbine blade 2 reaches the theoretical design length.

[0074] By setting the above steps, the position of the root end face of the wind turbine blade 2 can be accurately determined, so that the root can be cut, and the accurate measurement and control of the length of the wind turbine blade 2 can be achieved, meeting the design requirements. Among them, the third preset distance and the first preset distance are both preset values. In some optional embodiments, the third preset distance and the first preset distance are both 1mm. Among them, "the tip of the wind turbine blade 2 is within the height range of the tip measurement and positioning panel 130" means that the wind turbine blade 2 and the tip measurement and positioning panel 130 are basically in the same height range, and the second sensor 1301 arranged on the tip measurement and positioning panel 130 can detect the distance between the two. Preferably, "the tip of the wind turbine blade 2 is within the height range of the tip measurement and positioning panel 130" means that the tip of the wind turbine blade 2 and the second sensor 1301 are at the same height. It should be understood that, Figure 4 As shown, a control button 110 is provided on the control system 11 , and the control button 110 is used by an operator to perform corresponding control operations.

[0075] Example 3

[0076] This embodiment provides a method for locating the length of a wind turbine blade, using the length measurement system described in Embodiment 1.

[0077] The length positioning method comprises the following steps:

[0078] Step S1: placing the wind turbine blade 2 on the blade root support 3 and the blade tip support 4;

[0079] Step S2: arranging the base 10 on the lower side of the wind turbine blade 2 along the length direction of the wind turbine blade 2;

[0080] Step S3: stretching the base 10 so that both ends of the base 10 in the length direction respectively exceed the blade root and blade tip of the wind turbine blade 2;

[0081] Step S4: placing the control system 11 on the base 10;

[0082] Step S5: a blade root measurement component 12 is arranged on the base 10, and is close to the blade root of the wind turbine blade 2, and a middle measurement component 14 is arranged between the blade root measurement component 12 and the control system 11, and the middle measurement component 14 is recorded as a first measurement component; a blade tip measurement component 13 is arranged on the base 10, and is close to the blade tip of the wind turbine blade 2, and another middle measurement component 14 is arranged between the blade tip measurement component 13 and the control system 11, and the middle measurement component 14 is recorded as a second measurement component;

[0083] Step S6: Move the blade tip measurement assembly 13 to a position beyond the tip of the wind turbine blade 2 through the control system 11; then extend the blade tip measurement telescopic rod 132 through the control system 11; when the blade tip of the wind turbine blade 2 is within the height range of the blade tip measurement positioning panel 130, control the blade tip measurement telescopic rod 132 to stop extending through the control system 11, and control the blade tip measurement positioning panel 130 to move toward the blade tip; when the second sensor 1301 detects that the distance between the blade tip measurement positioning panel 130 and the blade tip of the wind turbine blade 2 is within a third preset distance, the blade tip measurement assembly 13 stops moving, and the control system 11 measures and records the distance A between the control system 11 and the blade tip measurement assembly 13;

[0084] Step S7: The control system 11 calculates the required distance E=LAD between the control system 11 and the middle measuring component 14 according to the length D of the specific area position, the length L of the wind turbine blade 2, and the value of A; the positive and negative values ​​of E are judged. When E is a positive value, E represents the distance between the first measuring component and the control system 11. The control system 11 moves the first measuring component to a position at a distance E from the control system 11, and the middle measuring telescopic rod 140 of the first measuring component is extended. When the fourth sensor 1401 on the middle measuring telescopic rod 140 detects that the distance from the wind turbine blade 2 is When the outer surface is within the fourth preset distance, the middle measuring telescopic rod 140 stops extending, and its corresponding position is the target position; when E is a negative value, E represents the distance between the second measuring component and the control system 11, and the second measuring component is moved to a position with a distance E from the control system 11 through the control system 11, so that the middle measuring telescopic rod 140 of the second measuring component is extended, and when the fourth sensor 1401 on the middle measuring telescopic rod 140 detects that the distance to the outer surface of the wind turbine blade 2 is within the fourth preset distance, the middle measuring telescopic rod 140 stops extending, and its corresponding position is the target position;

[0085] Step S8: Draw a corresponding specific area mark at the target position of the wind turbine blade 2 .

[0086] It should be understood that the specific area includes but is not limited to blade hoisting marks, transportation marks or other safety marks. Through the above steps, the specific area on the wind turbine blade 2 that needs to be marked can be accurately found. The operation process is simple and convenient, and the positioning is accurate, which greatly improves the safety of the wind turbine blade 2 during transportation and handling. It should be noted that the specific area position length D refers to the distance between the specific area and the root end face of the wind turbine blade 2.

[0087] The third preset distance and the fourth preset distance are both preset values. In some optional embodiments, the third preset distance and the fourth preset distance are both 1 mm.

[0088] It should be noted that all the terms used in the present invention to indicate directionality and position, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "top", "lower", "tail end", "head end", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0089] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A wind turbine blade length measurement and positioning system, used for measuring the length of a wind turbine blade (2), characterized in that: include: A base (10), a control system (11), a blade root measurement assembly (12), and a blade tip measurement assembly (13); the control system (11) is fixedly arranged on the base (10); the blade root measurement assembly (12) and the blade tip measurement assembly (13) are movably arranged on the base (10) along the length direction; the blade root measurement assembly (12) and the blade tip measurement assembly (13) can rise to approach or fall away from the wind turbine blade (2); the blade root measurement assembly (12) comprises a blade root measurement base (121), a blade root measurement telescopic rod (122), and a blade root measurement template (120); the blade root measurement base (121) is movably connected to the base (10); one end of the blade root measurement telescopic rod (122) is connected to the blade root measurement base (121), and the other end is connected to the blade root measurement template (120); the blade root measurement telescopic rod (122) is relatively close to the blade root measurement base (121); The blade tip measurement assembly (13) comprises a blade tip measurement base (131), a blade tip measurement telescopic rod (132) and a blade tip measurement positioning panel (130); the blade tip measurement base (131) is movably connected to the base (10); one end of the blade tip measurement telescopic rod (132) is connected to the blade tip measurement base (131) and the other end is connected to the blade tip measurement positioning panel (130); the blade tip measurement telescopic rod (132) is telescopically movable relative to the blade tip measurement base (131); a second sensor (1301) is arranged on a side surface of the blade tip measurement positioning panel (130) facing the blade root measurement assembly (12); and a third sensor (1302) is arranged on the top of the blade tip measurement positioning panel (130).

2. The wind turbine blade length measurement and positioning system according to claim 1, characterized in that: The base (10) is telescopically arranged in the length direction.

3. The wind turbine blade length measurement and positioning system according to claim 1 or 2, characterized in that: It also comprises a middle measurement component (14), which is movably arranged on the base (10) along the length direction, and the middle measurement component (14) can rise to approach or fall away from the wind turbine blade (2).

4. The wind turbine blade length measurement and positioning system according to claim 3, characterized in that: There are more than two middle measurement components (14), wherein at least one middle measurement component (14) is arranged between the control system (11) and the blade root measurement component (12), and at least one middle measurement component (14) is arranged between the control system (11) and the blade tip measurement component (13).

5. The wind turbine blade length measurement and positioning system according to claim 3, characterized in that: The middle measurement assembly (14) comprises a middle measurement telescopic rod (140) and a middle measurement base (141); the middle measurement base (141) is movably connected to the base (10); one end of the middle measurement telescopic rod (140) is connected to the middle measurement base (141); and the other end is provided with a fourth sensor (1401).

6. A method for measuring the length of a wind turbine blade, used in a length measurement and positioning system as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1: placing a wind turbine blade (2) on a blade root support (3) and a blade tip support (4); Step S2: arranging the base (10) on the lower side of the wind turbine blade (2) along the length direction of the wind turbine blade (2); Step S3: stretching the base (10) so that both ends of the base (10) in the length direction respectively extend beyond the blade root and blade tip of the wind turbine blade (2); Step S4: placing the control system (11) on the base (10); Step S5: arranging the blade root measurement component (12) on the base (10) and placing it close to the blade root of the wind turbine blade (2); arranging the blade tip measurement component (13) on the base (10) and placing it close to the blade tip of the wind turbine blade (2); Step S6: the blade tip measurement assembly (13) is moved to a position beyond the tip of the wind turbine blade (2) by the control system (11); the blade tip measurement telescopic rod (132) is then extended by the control system (11); when the blade tip of the wind turbine blade (2) is within the height range of the blade tip measurement positioning panel (130), the blade tip measurement telescopic rod (132) is controlled by the control system (11) to stop extending, and the blade tip measurement positioning panel (130) is controlled to move in a direction close to the blade tip; when the second sensor (1301) detects that the distance between the blade tip measurement positioning panel (130) and the blade tip of the wind turbine blade (2) is within a third preset distance, the blade tip measurement assembly (13) stops moving, and the control system (11) measures and records the distance A between the control system (11) and the blade tip measurement assembly (13); Step S7: the control system (11) calculates the required distance B=LA between the control system (11) and the blade root measurement assembly (12) according to the design length L of the wind turbine blade (2) and the value of A; the control system (11) moves the blade root measurement assembly (12) to a position at a distance B from the control system (11); the control system (11) extends the blade root measurement telescopic rod (122); when the first sensor (1201) on the blade root measurement telescopic rod (122) detects that the distance to the outer surface of the wind turbine blade (2) is within a first preset distance, the blade root measurement telescopic rod (122) stops extending, the position of the blade root measurement template (120) corresponding to the wind turbine blade (2) is the position of the blade root end face in the design, and the position of the root end face is marked on the outer surface of the wind turbine blade (2); Step S8: performing root cutting along the root end surface marked on the wind turbine blade (2) so that the wind turbine blade (2) reaches the theoretical design length.

7. A method for locating the length of a wind turbine blade, used in a length measurement and positioning system as claimed in any one of claims 3 to 5, characterized in that: The following steps are involved: Step S1: placing a wind turbine blade (2) on a blade root support (3) and a blade tip support (4); Step S2: arranging the base (10) on the lower side of the wind turbine blade (2) along the length direction of the wind turbine blade (2); Step S3: stretching the base (10) so that both ends of the base (10) in the length direction respectively extend beyond the blade root and blade tip of the wind turbine blade (2); Step S4: placing the control system (11) on the base (10); Step S5: arranging the blade root measurement component (12) on the base (10) and making it close to the blade root of the wind turbine blade (2), and arranging a middle measurement component (14) between the blade root measurement component (12) and the control system (11), and the middle measurement component (14) is recorded as a first measurement component; arranging the blade tip measurement component (13) on the base (10) and making it close to the blade tip of the wind turbine blade (2), and arranging another middle measurement component (14) between the blade tip measurement component (13) and the control system (11), and the middle measurement component (14) is recorded as a second measurement component; Step S6: the blade tip measurement assembly (13) is moved to a position beyond the tip of the wind turbine blade (2) by the control system (11); the blade tip measurement telescopic rod (132) is then extended by the control system (11); when the blade tip of the wind turbine blade (2) is within the height range of the blade tip measurement positioning panel (130), the blade tip measurement telescopic rod (132) is controlled by the control system (11) to stop extending, and the blade tip measurement positioning panel (130) is controlled to move in a direction close to the blade tip; when the second sensor (1301) detects that the distance between the blade tip measurement positioning panel (130) and the blade tip of the wind turbine blade (2) is within a third preset distance, the blade tip measurement assembly (13) stops moving, and the control system (11) measures and records the distance A between the control system (11) and the blade tip measurement assembly (13); Step S7: The control system (11) calculates the required distance E=LAD between the control system (11) and the middle measuring component (14) according to the length D of the specific area position, the length L of the wind turbine blade (2), and the value of A; determines whether E is positive or negative; when E is a positive value, E represents the distance between the first measuring component and the control system (11); the control system (11) moves the first measuring component to a position at a distance E from the control system (11), and the middle measuring telescopic rod (140) of the first measuring component is extended; when the fourth sensor (1401) on the middle measuring telescopic rod (140) detects that the distance from the wind turbine blade ( 2) when the outer surface is within a fourth preset distance, the middle measuring telescopic rod (140) stops extending, and the corresponding position is the target position; when E is a negative value, E represents the distance between the second measuring component and the control system (11), and the second measuring component is moved to a position at a distance E from the control system (11) by the control system (11), so that the middle measuring telescopic rod (140) of the second measuring component is extended, and when the fourth sensor (1401) on the middle measuring telescopic rod (140) detects that the distance to the outer surface of the wind turbine blade (2) is within a fourth preset distance, the middle measuring telescopic rod (140) stops extending, and the corresponding position is the target position; Step S8: Draw a corresponding specific area mark at the target position of the wind turbine blade (2).

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