A method and device for measuring blade deformation

Abstract

The present application discloses a blade deformation measurement method and device. First, a first preset distance between a blade deformation measurement device and a blade root is obtained, and a first preset spacing between elastic ropes in the blade deformation measurement device is obtained. A first force value of the blade deformation measurement device before the blade moves is obtained according to a force sensor and a data collector, and a second force value of the blade deformation measurement device after the blade moves is obtained. Then, according to the first force value, the second force value and a preset stiffness coefficient of the blade deformation measurement device, a first deformation value of the blade deformation measurement device is obtained. Finally, according to the first deformation value and the first preset spacing, the angular radian of the blade at the first preset distance is obtained. In this way, the angular radian of the blade when it is deformed can be measured. Since the blade deformation device is on the blade, the blade deformation is less affected by environmental factors when measured, and the reliability of the measured result is higher.

Description

Technical Field

[0001] The present application relates to the technical field of wind turbine blades, and in particular to a blade deformation measurement method and device. Background Art

[0002] As society's demand for the functions of wind turbines grows, wind turbines are gradually becoming larger and larger, and wind turbine blades are becoming longer and longer. In order to reduce blade costs, the safety margin of blades is also constantly decreasing, resulting in increased blade flexibility and thus increased blade deformation, which increases the risk of blade sweeping the tower. Therefore, measuring blade deformation has become an urgent problem that needs to be solved.

[0003] At present, the main method for measuring blade deformation is to use a clearance radar to directly measure the blade tip. However, the use of a clearance radar to directly measure the blade tip is affected by environmental factors, and the reliability of the measured results is poor. Summary of the invention

[0004] In view of this, an embodiment of the present application provides a blade deformation measurement method and device, aiming to improve the reliability of blade deformation measurement results.

[0005] In a first aspect, an embodiment of the present application provides a blade deformation measurement method, wherein a blade deformation measurement device is located on a blade, and the method comprises:

[0006] Acquire a first preset distance between the blade deformation measuring device and the root of the blade, and acquire a first preset spacing between elastic ropes in the blade deformation measuring device;

[0007] Before the blade moves, a first force value of the blade deformation measuring device is obtained according to a force sensor and a data collector, wherein the force sensor is connected to the data collector through a wire;

[0008] After the blade moves, obtaining a second force value of the blade deformation measuring device according to the force sensor and the data collector;

[0009] Obtaining a first deformation value of the blade deformation measuring device according to a first force value of the blade deformation measuring device, a second force value of the blade deformation measuring device, and a preset stiffness coefficient of the blade deformation measuring device;

[0010] According to the first deformation value of the blade deformation measuring device and the first preset distance, the rotation angle arc of the blade at the first preset distance is obtained.

[0011] Optionally, the elastic rope in the blade deformation measuring device includes a first elastic rope and a second elastic rope, and the first preset distance is the distance between the first elastic rope and the second elastic rope.

[0012] Optionally, the force sensor comprises a first force sensor of a first elastic rope and a second force sensor of a second elastic rope, and before the blade moves, obtaining a first force value of the blade deformation measuring device according to the force sensor and a data collector comprises:

[0013] Before the blade moves, obtaining a first force value of the first elastic rope according to a first force sensor of the first elastic rope and the data collector;

[0014] Before the blade moves, a first force value of the second elastic rope is acquired according to the second force sensor of the second elastic rope and the data collector.

[0015] Optionally, after the blade moves, obtaining a second force value of the blade deformation measuring device according to the force sensor and the data collector includes:

[0016] After the blade moves, obtaining a second force value of the first elastic rope according to the first force sensor of the first elastic rope and the data collector;

[0017] After the blade moves, a second force value of the second elastic rope is acquired according to the second force sensor of the second elastic rope and the data collector.

[0018] Optionally, the preset stiffness coefficient of the blade deformation measuring device includes a preset stiffness coefficient of the first elastic rope and a preset stiffness coefficient of the second elastic rope, the first deformation value of the blade deformation measuring device includes a first deformation value of the first elastic rope and a first deformation value of the second elastic rope, and obtaining the first deformation value of the blade deformation measuring device according to the first force value of the blade deformation measuring device, the second force value of the blade deformation measuring device and the preset stiffness coefficient of the blade deformation measuring device includes:

[0019] Subtracting a first force value of the first elastic rope from a second force value of the first elastic rope to obtain a first difference value, and obtaining a first deformation value of the first elastic rope according to a ratio of the first difference value to a preset stiffness coefficient of the first elastic rope;

[0020] A second difference is obtained by subtracting the first force value of the second elastic rope from the second force value of the second elastic rope, and a first deformation value of the second elastic rope is obtained according to a ratio of the second difference to a preset stiffness coefficient of the second elastic rope.

[0021] Optionally, obtaining the rotation angle arc of the blade at the first preset distance according to the first deformation value of the blade deformation measuring device and the first preset distance includes:

[0022] subtracting the first deformation value of the first elastic cord from the first deformation value of the second elastic cord to obtain a third difference value;

[0023] The rotation angle radian of the blade at the first preset distance is obtained by calculating the ratio of the third difference and the first preset distance.

[0024] Optionally, the method further comprises:

[0025] Acquire a second preset distance between the blade deformation measuring device and the root of the blade, and acquire a second preset spacing between the elastic ropes in the blade deformation measuring device;

[0026] Before the blade moves, obtaining a third force value of the blade deformation measuring device according to the force sensor and the data collector;

[0027] After the blade moves, obtaining a fourth force value of the blade deformation measuring device according to the force sensor and the data collector;

[0028] Obtaining a second deformation value of the blade deformation measuring device according to a third force value of the blade deformation measuring device, a fourth force value of the blade deformation measuring device, and a preset stiffness coefficient of the blade deformation measuring device;

[0029] According to the second deformation value of the blade deformation measuring device and the second preset distance, the rotation angle arc of the blade at the second preset distance is obtained.

[0030] In a second aspect, an embodiment of the present application provides a blade deformation measuring device, wherein the blade deformation measuring device is deployed on a blade, and the device comprises:

[0031] a first acquisition module, configured to acquire a first preset distance between the blade deformation measuring device and the root of the blade, and to acquire a first preset spacing between elastic ropes in the blade deformation measuring device;

[0032] A second acquisition module, used for acquiring a first force value of the blade deformation measuring device according to a force sensor and a data collector before the blade moves, wherein the force sensor is connected to the data collector through a wire;

[0033] A third acquisition module, configured to acquire a second force value of the blade deformation measuring device according to the force sensor and the data collector after the blade moves;

[0034] A first deformation value obtaining module, used to obtain a first deformation value of the blade deformation measuring device according to a first force value of the blade deformation measuring device, a second force value of the blade deformation measuring device and a preset stiffness coefficient of the blade deformation measuring device;

[0035] The module for obtaining the rotation angle radian is used to obtain the rotation angle radian of the blade at the first preset distance according to the first deformation value of the blade deformation measuring device and the first preset distance.

[0036] In a third aspect, an embodiment of the present application provides a blade deformation measurement device, the device comprising:

[0037] Memory for storing computer programs;

[0038] The processor is used to execute the computer program so that the device performs the blade deformation measurement method described in the first aspect.

[0039] In a fourth aspect, an embodiment of the present application provides a computer storage medium, wherein a computer program is stored on the computer-readable storage medium. When the computer program is executed, a device executing the computer program implements the blade deformation measurement method described in the first aspect.

[0040] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0041] The present application provides a blade deformation measurement method and device, firstly obtaining a first preset distance between a blade deformation measurement device and the root of a blade, and obtaining a first preset spacing between elastic ropes in the blade deformation measurement device, wherein the blade deformation device is located on the blade. Before the blade moves, a first force value of the blade deformation measurement device is obtained according to a force sensor and a data collector, wherein the force sensor is connected to the data collector through a wire. After the blade moves, a second force value of the blade deformation measurement device is obtained according to the force sensor and the data collector. Then, according to the first force value of the blade deformation measurement device, the second force value of the blade deformation measurement device and the preset stiffness coefficient of the blade deformation measurement device, the first deformation value of the blade deformation measurement device is obtained. Finally, according to the first deformation value of the blade deformation measurement device and the first preset spacing, the angular arc of the blade at the first preset distance is obtained. The deformation value of the blade deformation measuring device can be obtained according to the force value of the blade deformation measuring device before the blade moves, the force value of the blade deformation measuring device after the blade moves, and the preset stiffness coefficient of the blade deformation measuring device. The angular radian of the blade at the first preset distance can be obtained according to the deformation value of the blade deformation measuring device and the spacing between the elastic ropes in the blade deformation measuring device. In this way, the angular radian of the blade when it is deformed can be measured. Since the blade deformation device is on the blade, it is less affected by environmental factors when measuring the blade deformation, and the measured result is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A method flow chart of a blade deformation measurement method provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the structure of the blade deformation measurement device provided in an embodiment of the present application when it is located at a first preset distance;

[0045] Figure 3 A method flow chart of another blade deformation measurement method provided in an embodiment of the present application;

[0046] Figure 4 A schematic structural diagram of a blade deformation measurement device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] At present, the main method for measuring blade deformation is to use a clearance radar to directly measure the blade tip. However, the use of a clearance radar to directly measure the blade tip is affected by environmental factors, and the reliability of the measured results is poor.

[0049] Based on this, in order to solve the above problems, in an embodiment of the present application, firstly, a first preset distance between a blade deformation measuring device and the root of a blade is obtained, and a first preset spacing between elastic ropes in the blade deformation measuring device is obtained, wherein the blade deformation device is located on the blade. Before the blade moves, a first force value of the blade deformation measuring device is obtained according to a force sensor and a data collector, wherein the force sensor is connected to the data collector through a wire. After the blade moves, a second force value of the blade deformation measuring device is obtained according to the force sensor and the data collector. Then, according to the first force value of the blade deformation measuring device, the second force value of the blade deformation measuring device and the preset stiffness coefficient of the blade deformation measuring device, the first deformation value of the blade deformation measuring device is obtained. Finally, according to the first deformation value of the blade deformation measuring device and the first preset spacing, the angular arc of the blade at the first preset distance is obtained.

[0050] It can be seen that the deformation value of the blade deformation measuring device can be obtained according to the force value of the blade deformation measuring device before the blade moves, the force value of the blade deformation measuring device after the blade moves, and the preset stiffness coefficient of the blade deformation measuring device. According to the deformation value of the blade deformation measuring device and the spacing between the elastic ropes in the blade deformation measuring device, the angular radian of the blade at the first preset distance can be obtained. In this way, the angular radian of the blade when it is deformed can be measured. Since the blade deformation device is on the blade, it is less affected by environmental factors when measuring the blade deformation, and the measured result is more reliable.

[0051] The specific implementation of the blade deformation measurement method and device in the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0052] See also Figure 1 , which is a flow chart of a blade deformation measurement method provided in an embodiment of the present application, combined with Figure 1 As shown, the blade deformation measuring device is located on the blade and may specifically include:

[0053] S101: Acquire a first preset distance between a blade deformation measuring device and a root of a blade, and acquire a first preset spacing between elastic ropes in the blade deformation measuring device.

[0054] See also Figure 2 As shown, Figure 2 2 is a structural schematic diagram of a blade deformation measuring device when it is located at a first preset distance. The blade deformation device includes a first elastic rope 21, a second elastic rope 22, a first force sensor 23 of the first elastic rope, a second force sensor 24 of the second elastic rope, a data collector 25 and a wire 26. The first elastic rope 21 and the second elastic rope 22 are parallel to each other, and the first elastic rope 21 and the second elastic rope 22 are parallel to the blade axis. The ends of the first elastic rope 21 and the second elastic rope 22 close to the blade root are respectively fixed to the web close to the blade root. The end of the first elastic rope 21 away from the blade root is connected to the first force sensor 23 of the first elastic rope, and the end of the second elastic rope 22 away from the blade root is connected to the second force sensor 24 of the second elastic rope. The first force sensor 23 of the first elastic rope and the second force sensor 24 of the second elastic rope are respectively fixed to the web away from the blade root. The data collector 25, the first force sensor 23 of the first elastic rope and the second force sensor 24 of the second elastic rope are connected through the wire 26. The first elastic rope 21, the second elastic rope 22, the first force sensor 23 of the first elastic rope and the second force sensor 24 of the second elastic rope in the above-mentioned device can be fixed on the web of the blade by structural adhesive and fixed by hand-pasted bidirectional cloth. Of course, the present application does not specifically limit the fixing method and does not affect the implementation of the embodiments of the present application.

[0055] Among them, the first elastic rope 21 and the second elastic rope 22 are used to test blade deformation, the first force sensor 23 of the first elastic rope is used to record the force value of the first elastic rope 21, the second force sensor 24 of the second elastic rope is used to record the force value of the second elastic rope 22, the data collector 25 is used to collect the force value of the first elastic rope 21 and the force value of the second elastic rope 22, and the wire 26 is used to connect the data collector 25, the first force sensor 23 of the first elastic rope and the second force sensor 24 of the second elastic rope.

[0056] A first preset distance between the blade deformation measuring device and the root of the blade is obtained, and a first preset spacing between the first elastic rope and the second elastic rope is obtained. As an example, the first preset distance is L0, and the first preset spacing is h.

[0057] S102: Before the blade moves, a first force value of the blade deformation measuring device is obtained according to a force sensor and a data collector, and the force sensor is connected to the data collector through a wire.

[0058] The force sensor includes a first force sensor for the first elastic rope and a second force sensor for the second elastic rope. Before the blade moves, the first force value of the first elastic rope is obtained according to the first force sensor for the first elastic rope and the data collector, and the first force value of the second elastic rope is obtained according to the second force sensor for the second elastic rope and the data collector. As an example, the first force value of the first elastic rope is F 0u , the first force value of the second elastic rope is F 0b .

[0059] S103: After the blade moves, a second force value of the blade deformation measuring device is obtained according to the force sensor and the data collector.

[0060] After the blade moves, the second force value of the first elastic rope is obtained according to the first force sensor of the first elastic rope and the data collector. After the blade moves, the second force value of the second elastic rope is obtained according to the second force sensor of the second elastic rope and the data collector. As an example, the second force value of the first elastic rope is F 1u , the second force value of the second elastic rope is F 1b .

[0061] S104: Obtaining a first deformation value of the blade deformation measuring device according to the first force value of the blade deformation measuring device, the second force value of the blade deformation measuring device, and a preset stiffness coefficient of the blade deformation measuring device.

[0062] The preset stiffness coefficient of the blade deformation measuring device includes a preset stiffness coefficient of the first elastic rope and a preset stiffness coefficient of the second elastic rope. The first force value of the first elastic rope and the second force value of the first elastic rope are subtracted to obtain a first difference. According to the ratio of the first difference and the preset stiffness coefficient of the first elastic rope, the first deformation value of the first elastic rope is obtained by the following formula 1.

[0063] Δl u =(F 1u -F 0u ) / k (Formula 1)

[0064] Where, Δl in formula 1 u represents the first deformation value of the first elastic cord, F 1u Indicates the second force value of the first elastic rope, F 0u represents a first force value of the first elastic rope, and k represents a preset stiffness coefficient of the first elastic rope.

[0065] The first force value of the second elastic rope is subtracted from the second force value of the second elastic rope to obtain a second difference value, and the first deformation value of the second elastic rope is obtained by the following formula 2 according to the ratio of the second difference value and the preset stiffness coefficient of the second elastic rope.

[0066] Δl b =(F 1b -F 0b ) / k (Formula 2)

[0067] Where, Δl in formula 2 b Indicates the first deformation value of the second elastic cord, F 1b Indicates the second force value of the second elastic rope, F 0b represents the first force value of the second elastic rope, and k represents the preset stiffness coefficient of the second elastic rope.

[0068] S105: Obtaining a rotation angle arc of the blade at a first preset distance according to a first deformation value of the blade deformation measuring device and a first preset distance.

[0069] The first deformation value of the first elastic rope is subtracted from the first deformation value of the second elastic rope to obtain a third difference value, and a ratio calculation is performed based on the third difference value and the first preset distance to obtain the angular arc of the blade at the first preset distance through the following formula 3.

[0070] Δθ=(Δl u -Δl b ) / h (Formula 3)

[0071] Where, Δl in formula 3 u represents the first deformation value of the first elastic cord, Δl b represents the first deformation value of the second elastic rope, h represents the first preset distance between the first elastic rope and the second elastic rope, and Δθ represents the rotation angle arc of the blade when the blade is at the first preset distance L0.

[0072] The above is a blade deformation measurement method provided in an embodiment of the present application. First, a first preset distance between a blade deformation measurement device and the root of a blade is obtained, and a first preset spacing between elastic ropes in the blade deformation measurement device is obtained, wherein the blade deformation device is located on the blade. Before the blade moves, a first force value of the blade deformation measurement device is obtained according to a force sensor and a data collector, wherein the force sensor is connected to the data collector through a wire. After the blade moves, a second force value of the blade deformation measurement device is obtained according to the force sensor and the data collector. Then, according to the first force value of the blade deformation measurement device, the second force value of the blade deformation measurement device and the preset stiffness coefficient of the blade deformation measurement device, the first deformation value of the blade deformation measurement device is obtained. Finally, according to the first deformation value of the blade deformation measurement device and the first preset spacing, the angular arc of the blade at the first preset distance is obtained.

[0073] It can be seen that the deformation value of the blade deformation measuring device can be obtained according to the force value of the blade deformation measuring device before the blade moves, the force value of the blade deformation measuring device after the blade moves, and the preset stiffness coefficient of the blade deformation measuring device. According to the deformation value of the blade deformation measuring device and the spacing between the elastic ropes in the blade deformation measuring device, the angular radian of the blade at the first preset distance can be obtained. In this way, the angular radian of the blade when it is deformed can be measured. Since the blade deformation device is on the blade, it is less affected by environmental factors when measuring the blade deformation, and the measured result is more reliable.

[0074] See also Figure 3 , which is a flow chart of another blade deformation measurement method provided in an embodiment of the present application, combined with Figure 3 As shown, it may specifically include:

[0075] S301: Acquire a second preset distance between the blade deformation measuring device and the root of the blade, and acquire a second preset spacing between elastic ropes in the blade deformation measuring device.

[0076] The blade deformation measuring device can also be arranged at different positions to facilitate the rotation angle measurement at different positions, obtain the second preset distance between the blade deformation measuring device and the root of the blade, and obtain the second preset spacing between the first elastic rope and the second elastic rope in the blade deformation measuring device.

[0077] S302: Before the blade moves, a third force value of the blade deformation measuring device is obtained according to the force sensor and the data collector.

[0078] S303: After the blade moves, a fourth force value of the blade deformation measuring device is obtained according to the force sensor and the data collector.

[0079] S304: Obtain a second deformation value of the blade deformation measuring device according to the third force value of the blade deformation measuring device, the fourth force value of the blade deformation measuring device, and a preset stiffness coefficient of the blade deformation measuring device.

[0080] S305: Obtaining the rotation angle arc of the blade at the second preset distance according to the second deformation value and the second preset distance of the blade deformation measuring device.

[0081] In the embodiment of the present application, S301-S305 are the same as S101-S105 in the above embodiment, except that the first preset distance is replaced by the second preset distance, the first preset spacing is replaced by the second preset spacing, the first force value is replaced by the third force value, the second force value is replaced by the fourth force value, and the first deformation value is replaced by the second deformation value; therefore, the specific implementation method of S301-S305 can refer to the specific implementation method of S101-S105, which will not be repeated here.

[0082] The above is another blade deformation measurement method provided in an embodiment of the present application. First, a second preset distance between the blade deformation measurement device and the root of the blade is obtained, and a second preset spacing between the elastic ropes in the blade deformation measurement device is obtained, wherein the blade deformation device is located on the blade. Before the blade moves, a third force value of the blade deformation measurement device is obtained according to the force sensor and the data collector, wherein. After the blade moves, a fourth force value of the blade deformation measurement device is obtained according to the force sensor and the data collector. Then, according to the third force value of the blade deformation measurement device, the fourth force value of the blade deformation measurement device and the preset stiffness coefficient of the blade deformation measurement device, the second deformation value of the blade deformation measurement device is obtained. Finally, according to the second deformation value and the second preset spacing of the blade deformation measurement device, the angular arc of the blade at the second preset distance is obtained.

[0083] It can be seen that when the device is arranged at a certain distance on the web of the blade, the deformation state and deformation amount of the blade can be analyzed, and the rotation angle of different positions can be monitored to analyze whether there are large defects or loads at different spanwise positions of the blade. The deformation value of the blade deformation measuring device can be obtained according to the force value of the blade deformation measuring device before the blade moves, the force value of the blade deformation measuring device after the blade moves, and the preset stiffness coefficient of the blade deformation measuring device. According to the deformation value of the blade deformation measuring device and the spacing between the elastic ropes in the blade deformation measuring device, the rotation angle radian of the blade at the second preset distance can be obtained. Since the blade deformation device is on the blade, it is less affected by environmental factors when measuring blade deformation, and the measured results are more reliable. At the same time, it can be applied to different positions on the blade to measure the rotation angle radian of blade deformation at different positions.

[0084] The above are some specific implementations of the blade deformation measurement method provided in the embodiment of the present application. Based on this, the present application also provides a corresponding device. The device provided in the embodiment of the present application will be introduced from the perspective of functional modularization.

[0085] See also Figure 4 , which is a schematic diagram of the structure of a blade deformation measurement device 400 provided in an embodiment of the present application. The blade deformation measurement device is deployed on a blade. The device 400 may include:

[0086] A first acquisition module 401 is used to acquire a first preset distance between the blade deformation measuring device and the root of the blade, and to acquire a first preset spacing between elastic ropes in the blade deformation measuring device;

[0087] The second acquisition module 402 is used to acquire a first force value of the blade deformation measurement device according to a force sensor and a data collector before the blade moves, wherein the force sensor is connected to the data collector through a wire;

[0088] The third acquisition module 403 is used to acquire a second force value of the blade deformation measurement device according to the force sensor and the data collector after the blade moves;

[0089] A first deformation value obtaining module 404 is used to obtain a first deformation value of the blade deformation measuring device according to a first force value of the blade deformation measuring device, a second force value of the blade deformation measuring device and a preset stiffness coefficient of the blade deformation measuring device;

[0090] The module 405 for obtaining the rotation angle radian is used to obtain the rotation angle radian of the blade at a first preset distance according to the first deformation value of the blade deformation measuring device and the first preset distance.

[0091] In the embodiment of the present application, through the cooperation of the first acquisition module 401, the second acquisition module 402, the third acquisition module 403, the first deformation value acquisition module 404 and the rotation angle radian acquisition module 405, the deformation value of the blade deformation measuring device can be obtained according to the force value of the blade deformation measuring device before the blade moves, the force value of the blade deformation measuring device after the blade moves, and the preset stiffness coefficient of the blade deformation measuring device. According to the deformation value of the blade deformation measuring device and the distance between the elastic ropes in the blade deformation measuring device, the rotation angle radian of the blade at the first preset distance can be obtained. In this way, the rotation angle radian of the blade when it is deformed can be measured. Since the blade deformation device is on the blade, the blade deformation is less affected by environmental factors when measuring, and the measured result is more reliable.

[0092] As an implementation manner, the elastic rope in the blade deformation measuring device includes a first elastic rope and a second elastic rope, and the first preset distance is the distance between the first elastic rope and the second elastic rope.

[0093] As an implementation manner, the second acquisition module 402 includes:

[0094] A first acquisition unit, used for acquiring a first force value of the first elastic rope according to a first force sensor of the first elastic rope and a data collector before the blade moves;

[0095] A second acquisition unit is used to acquire a first force value of the second elastic rope according to a second force sensor of the second elastic rope and a data collector before the blade moves;

[0096] As an implementation manner, the third acquisition module 403 includes:

[0097] a third acquisition unit, configured to acquire a second force value of the first elastic rope according to the first force sensor of the first elastic rope and the data collector after the blade moves;

[0098] The fourth acquisition unit is used to acquire a second force value of the second elastic rope according to a second force sensor of the second elastic rope and a data collector after the blade moves.

[0099] As an implementation manner, the first deformation value obtaining module 404 includes:

[0100] a first subtracting unit, configured to subtract a first force value of the first elastic rope from a second force value of the first elastic rope to obtain a first difference value, and to obtain a first deformation value of the first elastic rope according to a ratio of the first difference value to a preset stiffness coefficient of the first elastic rope;

[0101] The second subtracting unit is used to subtract the first force value of the second elastic rope from the second force value of the second elastic rope to obtain a second difference, and obtain a first deformation value of the second elastic rope according to the ratio of the second difference to a preset stiffness coefficient of the second elastic rope.

[0102] As an implementation manner, the module 405 for obtaining the angle radian includes:

[0103] A third difference unit is used to obtain a third difference by subtracting the first deformation value of the first elastic cord from the first deformation value of the second elastic cord;

[0104] The calculation unit is used to calculate the ratio of the third difference and the first preset distance to obtain the radian of the blade when the blade is at the first preset distance.

[0105] As an implementation manner, the blade deformation measuring device 400 further includes:

[0106] a fifth obtaining unit, configured to obtain a second preset distance between the blade deformation measuring device and the root of the blade, and to obtain a second preset spacing between elastic ropes in the blade deformation measuring device;

[0107] A sixth acquisition unit, used for acquiring a third force value of the blade deformation measuring device according to the force sensor and the data collector before the blade moves;

[0108] A seventh acquisition unit, configured to acquire a fourth force value of the blade deformation measuring device according to the force sensor and the data collector after the blade moves;

[0109] a first obtaining unit, configured to obtain a second deformation value of the blade deformation measuring device according to a third force value of the blade deformation measuring device, a fourth force value of the blade deformation measuring device, and a preset stiffness coefficient of the blade deformation measuring device;

[0110] The second obtaining unit is used to obtain the rotation angle arc of the blade at a second preset distance according to the second deformation value and the second preset distance of the blade deformation measuring device.

[0111] The embodiments of the present application also provide corresponding devices and computer storage media for implementing the solutions provided by the embodiments of the present application.

[0112] The device includes a memory and a processor, the memory is used to store a computer program, and the processor is used to execute the computer program, so that the device executes the blade deformation measurement method described in any embodiment of the present application.

[0113] The computer storage medium stores a computer program. When the code is executed, a device executing the computer program implements the blade deformation measurement method described in any embodiment of the present application.

[0114] The "first" and "second" in the names such as "first" and "second" (if any) mentioned in the embodiments of the present application are only used as name identifiers and do not represent the first or second in order.

[0115] Through the description of the above implementation methods, it can be known that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a read-only memory (ROM) / RAM, a magnetic disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network communication device such as a router) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

[0116] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The device embodiment described above is merely schematic, in which the unit described as a separate component may or may not be physically separated, and the component prompted as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0117] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A blade deformation measurement method, characterized in that: The blade deformation measuring device is located on the blade, and the method comprises: Acquire a first preset distance between the blade deformation measuring device and the root of the blade, and acquire a first preset spacing between elastic ropes in the blade deformation measuring device; Before the blade moves, a first force value of the blade deformation measuring device is obtained according to a force sensor and a data collector, wherein the force sensor is connected to the data collector through a wire; After the blade moves, obtaining a second force value of the blade deformation measuring device according to the force sensor and the data collector; Obtaining a first deformation value of the blade deformation measuring device according to a first force value of the blade deformation measuring device, a second force value of the blade deformation measuring device, and a preset stiffness coefficient of the blade deformation measuring device; According to the first deformation value of the blade deformation measuring device and the first preset distance, obtaining the rotation angle arc of the blade at the first preset distance; The elastic rope in the blade deformation measuring device comprises a first elastic rope and a second elastic rope, and the first preset distance is the distance between the first elastic rope and the second elastic rope; The first force value of the blade deformation device includes the first force value of the first elastic rope and the first force value of the second elastic rope, and the second force value of the blade deformation device includes the second force value of the first elastic rope and the second force value of the second elastic rope; The preset stiffness coefficient of the blade deformation measuring device includes the preset stiffness coefficient of the first elastic rope and the preset stiffness coefficient of the second elastic rope, the first deformation value of the blade deformation measuring device includes the first deformation value of the first elastic rope and the first deformation value of the second elastic rope, and obtaining the first deformation value of the blade deformation measuring device according to the first force value of the blade deformation measuring device, the second force value of the blade deformation measuring device and the preset stiffness coefficient of the blade deformation measuring device includes: Subtracting a first force value of the first elastic rope from a second force value of the first elastic rope to obtain a first difference value, and obtaining a first deformation value of the first elastic rope according to a ratio of the first difference value to a preset stiffness coefficient of the first elastic rope; Subtracting the first force value of the second elastic cord from the second force value of the second elastic cord to obtain a second difference value, and obtaining a first deformation value of the second elastic cord according to a ratio of the second difference value to a preset stiffness coefficient of the second elastic cord; The step of obtaining the rotation angle arc of the blade at the first preset distance according to the first deformation value of the blade deformation measuring device and the first preset distance comprises: subtracting the first deformation value of the first elastic cord from the first deformation value of the second elastic cord to obtain a third difference value; The rotation angle radian of the blade at the first preset distance is obtained by calculating the ratio of the third difference and the first preset distance.

2. The method according to claim 1, characterized in that The force sensor comprises a first force sensor of a first elastic rope and a second force sensor of a second elastic rope. Before the blade moves, obtaining a first force value of the blade deformation measuring device according to the force sensor and the data collector comprises: Before the blade moves, obtaining a first force value of the first elastic rope according to a first force sensor of the first elastic rope and the data collector; Before the blade moves, a first force value of the second elastic rope is acquired according to the second force sensor of the second elastic rope and the data collector.

3. The method according to claim 2, characterized in that After the blade moves, obtaining a second force value of the blade deformation measuring device according to the force sensor and the data collector includes: After the blade moves, obtaining a second force value of the first elastic rope according to the first force sensor of the first elastic rope and the data collector; After the blade moves, a second force value of the second elastic rope is acquired according to the second force sensor of the second elastic rope and the data collector.

4. A blade deformation measuring device, characterized in that: The blade deformation measuring device is deployed on the blade, and the device comprises: a first acquisition module, configured to acquire a first preset distance between the blade deformation measuring device and the root of the blade, and to acquire a first preset spacing between elastic ropes in the blade deformation measuring device; A second acquisition module, used for acquiring a first force value of the blade deformation measuring device according to a force sensor and a data collector before the blade moves, wherein the force sensor is connected to the data collector through a wire; A third acquisition module, configured to acquire a second force value of the blade deformation measuring device according to the force sensor and the data collector after the blade moves; A first deformation value obtaining module, used to obtain a first deformation value of the blade deformation measuring device according to a first force value of the blade deformation measuring device, a second force value of the blade deformation measuring device and a preset stiffness coefficient of the blade deformation measuring device; A module for obtaining a rotation angle radian, used for obtaining a rotation angle radian of the blade at the first preset distance according to a first deformation value of the blade deformation measuring device and the first preset distance; The elastic rope in the blade deformation measuring device includes a first elastic rope and a second elastic rope, and the first preset distance is the distance between the first elastic rope and the second elastic rope; The first force value of the blade deformation device includes the first force value of the first elastic rope and the first force value of the second elastic rope, and the second force value of the blade deformation device includes the second force value of the first elastic rope and the second force value of the second elastic rope; The preset stiffness coefficient of the blade deformation measuring device includes the preset stiffness coefficient of the first elastic rope and the preset stiffness coefficient of the second elastic rope, the first deformation value of the blade deformation measuring device includes the first deformation value of the first elastic rope and the first deformation value of the second elastic rope, and the first deformation value obtaining module includes: a first subtracting unit, configured to subtract a first force value of the first elastic rope from a second force value of the first elastic rope to obtain a first difference value, and to obtain a first deformation value of the first elastic rope according to a ratio of the first difference value to a preset stiffness coefficient of the first elastic rope; A second subtracting unit is used to subtract the first force value of the second elastic rope from the second force value of the second elastic rope to obtain a second difference value, and obtain a first deformation value of the second elastic rope according to a ratio of the second difference value to a preset stiffness coefficient of the second elastic rope; Get the module of corner radian, including: A third difference unit is used to obtain a third difference by subtracting the first deformation value of the first elastic cord from the first deformation value of the second elastic cord; The calculation unit is used to calculate the ratio of the third difference and the first preset distance to obtain the radian of the blade when the blade is at the first preset distance.

5. A blade deformation measuring device, characterized in that: The device comprises: Memory for storing computer programs; A processor is used to execute the computer program so that the device performs the blade deformation measurement method according to any one of claims 1 to 3.

6. A computer storage medium, characterized in that: The computer storage medium stores a computer program, and when the computer program is executed by a processor, the blade deformation measurement method according to any one of claims 1 to 3 is implemented.

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