A cantilever load monitoring device

Abstract

This invention proposes a cantilever load monitoring device, wherein a mounting base plate serves as the basic mounting plane, with a cantilever beam fixing seat and a sensor fastener seat respectively installed at both ends. The cantilever beam is fixed by the cantilever beam fixing seat and supported by a retaining pad, forming a double-position support structure. This better ensures that the central axis of the cantilever beam is parallel to the mounting base plate, reducing the offset of the end of the cantilever beam away from the cantilever beam fixing seat due to its own weight or vibration during assembly and transportation. The sensor assembly is fixed to one end of the mounting base plate. When the cantilever beam achieves a better position, the relative position of the sensor assembly and the cantilever beam can also achieve a better holding effect, increasing the accuracy of the cantilever load monitoring device and reducing false alarms.

Description

Technical Field

[0001] This utility model relates to the monitoring of cantilever loads of wind turbine units, specifically to a cantilever load monitoring device. Background Technology

[0002] Wind turbines rely on the rotation of blades under the action of wind power to convert wind energy into electrical energy. The blades are the core components of wind turbines. As the power of wind turbines continues to increase, the blades also continue to grow, causing them to bear greater loads. The forces acting on the blades include aerodynamic forces, centrifugal forces, and gravity. Aerodynamic forces cause the blades to bend and twist, centrifugal forces cause the blades to be stretched, bent, and twisted, and gravity causes the blades to be compressed, bent, and twisted. During the operation of the wind turbines, if the load on the blades exceeds the fatigue limit, the blades are prone to breakage and accidents. Therefore, load monitoring of wind turbine blades is of great significance.

[0003] Existing load monitoring devices generally consist of a sensor and a cantilever beam, which are positioned on the wind turbine blades in a specific relationship. When the wind turbine blades are subjected to excessive loads and deform, the positional relationship between the sensor and the cantilever beam changes. If the change in their positional relationship exceeds a set value, an alarm will be triggered. Based on the working principle of the load monitoring device, maintaining a specific positional relationship between the sensor and the cantilever beam when installed on the wind turbine blades is crucial. If this specific positional relationship is disrupted, the load monitoring device will become inaccurate or generate false alarms. How to design and manufacture a load monitoring device that maintains this specific positional relationship when installed on the wind turbine blades is a problem that engineers are dedicated to solving. Utility Model Content

[0004] The problem this invention aims to solve is to provide a cantilever load monitoring device that facilitates maintaining the sensor and the cantilever beam at specific positions.

[0005] The technical solution adopted by this utility model to solve the above problems is: a cantilever load monitoring device, comprising:

[0006] A cantilever beam assembly, wherein the cantilever beam assembly includes a cantilever beam mounting base and a cantilever beam;

[0007] A sensor assembly; and

[0008] A fixing assembly, wherein the fixing assembly includes a mounting base plate and at least one retaining pad disposed on the mounting base plate;

[0009] The cantilever beam assembly and the sensor assembly are respectively fixed to both ends of the mounting base plate, and the cantilever beam is supported by the cantilever beam fixing seat and the retaining pad to maintain the relative position of the sensor assembly and the cantilever beam.

[0010] Compared with the prior art, the mounting base plate of this utility model serves as the basic mounting plane, with cantilever beam fixing seats and sensor fastener seats respectively set at both ends. The cantilever beam is fixed by the cantilever beam fixing seats and supported by the retaining pads, forming a double-position support structure. This better ensures that the central axis of the cantilever beam is parallel to the mounting base plate, reducing the offset of the end of the cantilever beam away from the cantilever beam fixing seats due to its own weight or vibration during assembly and transportation. The sensor assembly is fixed to one end of the mounting base plate. When the cantilever beam achieves a better position, the relative position of the sensor assembly and the cantilever beam can also achieve a better holding effect, increasing the accuracy of the cantilever load monitoring device and reducing false alarms.

[0011] According to one embodiment of the present invention, the sensor assembly includes a sensor mounting base, a sensor locking part, and a sensor that is axially adjustable and disposed on the sensor mounting base.

[0012] The sensor mounting bracket includes a sensor mounting portion; the sensor is axially adjustable and disposed in the sensor mounting portion.

[0013] The sensor firmware mount includes a second mounting surface and a second reference surface disposed opposite to the second mounting surface;

[0014] The sensor locking part includes a toothed pad and a locking nut; the sensor is fixed to the sensor mounting part by the toothed pad and the locking nut.

[0015] According to one embodiment of the present invention, the mounting base plate includes a fourth reference surface, at least one cantilever beam positioning hole disposed at one end, at least one sensor positioning hole disposed at the other end, and at least one retaining pad positioning hole disposed between the cantilever beam positioning hole and the sensor positioning hole.

[0016] The cantilever beam fixing seat is fixed to the mounting base plate through the cantilever beam positioning hole; the sensor fixing seat is fixed to the mounting base plate through the sensor positioning hole; and the retaining pad is fixed to the mounting base plate through the retaining pad positioning hole.

[0017] According to one embodiment of the present invention, the retaining pad includes a parallelism retaining block and a locking block detachably connected to the parallelism retaining block;

[0018] The parallelism maintaining block has a third reference surface and a first slot; the locking block has a second slot.

[0019] According to one embodiment of the present invention, the cantilever beam fixing seat has an installation channel and at least one adhesive overflow channel;

[0020] The cantilever beam is fixed between the first slot and the second slot.

[0021] According to one embodiment of the present invention, the cantilever beam includes a beam body and an installation section disposed at one end of the beam body; the installation section with structural adhesive is disposed in the installation channel with structural adhesive, and the structural adhesive is squeezed into the overflow channel;

[0022] The cantilever beam mounting base includes a first mounting surface, a first reference surface disposed opposite to the first mounting surface, and at least one overflow surface; the overflow channel extends from the mounting channel to the overflow surface.

[0023] According to one embodiment of the present invention, the cantilever beam further includes a sensing segment disposed at the other end of the beam body;

[0024] The sensing section includes an adjusting screw and a sensing plate disposed at the end of the adjusting screw; the beam has an adjusting hole; the adjusting screw is configured to cooperate with the adjusting hole.

[0025] According to one embodiment of the present invention, when the first reference surface is in contact with the fourth reference surface and the third reference surface is in contact with the fourth reference surface, the central axis of the cantilever beam is parallel to the fourth reference surface;

[0026] When the second reference surface is in contact with the fourth reference surface, the central axis of the sensor mounting bracket remains parallel to the central axis of the cantilever beam.

[0027] According to one embodiment of the present invention, the locking block includes an upper end face; when the upper end face coincides with the first reference surface or the second reference surface, the cantilever beam disengages from the second slot.

[0028] According to one embodiment of the present invention, the fixing component further includes two lateral retaining strips respectively disposed on both sides of the mounting base plate; the two lateral retaining strips respectively restrict the position of the cantilever beam fixing seat, the sensor fastener seat and the retaining pad from both sides. Attached Figure Description

[0029] Figure 1 This is a perspective view of a cantilever load monitoring device according to a preferred embodiment of the present invention;

[0030] Figure 2 This is a front view schematic diagram of a cantilever load monitoring device according to a preferred embodiment of the present invention;

[0031] Figure 3 This is an exploded view from one side of a preferred embodiment of the cantilever load monitoring device according to the present invention;

[0032] Figure 4 This is an exploded view of another side of the cantilever load monitoring device according to another preferred embodiment of the present invention;

[0033] Figure 5 This is a top view schematic diagram of a cantilever load monitoring device according to a preferred embodiment of the present invention;

[0034] Figure 6 This is a cross-sectional schematic diagram of a cantilever load monitoring device according to another preferred embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram showing the state of the locking block when it is removed according to a preferred embodiment of the present invention;

[0036] In the picture:

[0037] Fixed component 1; mounting base plate 11, retaining pad 12, lateral retaining strip 13; fourth reference surface 111, cantilever beam positioning hole 112, sensor positioning hole 113, retaining pad positioning hole 114; parallelism retaining block 121, locking block 122; third reference surface 1211, first slot 1212; second slot 1221, upper end surface 1222;

[0038] Cantilever beam assembly 2; cantilever beam fixing seat 21, cantilever beam 22; installation channel 211, glue overflow channel 212, first assembly surface 213, first reference surface 214, glue overflow surface 215; beam body 221, installation section 222, sensing section 223; adjustment hole 2211, adjustment screw 2231, sensing plate 2232;

[0039] Sensor assembly 3; sensor mounting base 31, sensor 32, sensor locking part 33; sensor mounting part 311, second mounting surface 312, second reference surface 313; toothed pad 331, locking nut 332. Detailed Implementation

[0040] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0041] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0042] Those skilled in the art should understand that the embodiments of the present invention described below and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principles of the present invention are shown and described in the following embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

[0043] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0044] Please see Figure 1-7 The cantilever load monitoring device shown includes a fixing component 1 and a cantilever beam assembly 2 and a sensor assembly 3 respectively disposed at both ends of the fixing component 1. The cantilever beam assembly 2 includes a cantilever beam fixing seat 21 and a cantilever beam 22. The sensor assembly 3 includes a sensor mounting seat 31, a sensor locking part 33, and a sensor 32 axially adjustable and disposed on the sensor mounting seat 31. The fixing component 1 includes a mounting base plate 11 and at least one retaining pad 12 disposed on the mounting base plate 11. The cantilever beam fixing seat 21 is disposed at one end of the mounting base plate 11. The cantilever beam 22 is supported by the cantilever beam fixing seat 21 and the retaining pad 12, so that the central axis of the cantilever beam 22 is parallel to the mounting base plate 11. The sensor mounting seat 31 is disposed at the other end of the mounting base plate 11, so that the central axis of the sensor 32 coincides with the central axis of the cantilever beam 22. The sensor locking part 33 locks the sensor 32, so that the sensor 32 and the cantilever beam 22 maintain a fixed distance.

[0045] In some embodiments, the mounting base 11 serves as the basic mounting plane, with a cantilever beam fixing seat 21 and a sensor fastener seat 31 respectively provided at both ends. One end of the cantilever beam 22 is fixed by the cantilever beam fixing seat 21, and the other end is supported by the retaining pad 12, forming a double-support structure. This better ensures that the central axis of the cantilever beam 22 is parallel to the mounting base 11, reducing the offset of the cantilever beam 22 from the cantilever beam fixing seat 21 due to its own weight or vibration during assembly and transportation. The sensor fastener seat 31 is precisely installed through positioning holes to ensure that the central axis of the sensor 32 coincides with the central axis of the cantilever beam 22. The cantilever beam fixing seat 21 can be axially displaced on the mounting base 11 along the central axis of the cantilever beam 22. The sensor 32 can be adjusted in the sensor fastener seat 31 to achieve axial displacement. The spacing can be controlled by adjusting at least one of them. After the spacing is calibrated, a stable spatial position relationship is formed by locking the cantilever beam assembly 2 and / or the sensor locking part 33, so that the sensor 32 and the cantilever beam 22 maintain a fixed spacing.

[0046] Through the above technical solution, the reference positioning system of the mounting base plate 11 ensures the initial installation position and accuracy of the cantilever beam fixing seat 21 and the sensor fastener seat 31. The dual-position support structure composed of the cantilever beam fixing seat 21 and the retaining pad 12 better guarantees the state of the central axis of the cantilever beam 22, so that the central axis of the long cantilever beam 22 can always be aligned with the central axis of the sensor 32 under its own weight or the influence of assembly and transportation. Thus, when the entire cantilever load monitoring device is installed on the wind blade, the specific positional relationship of the central axis alignment is maintained. After the distance between the sensor 32 and the cantilever beam 22 is calibrated, it is fixed by the sensor locking part 33 and / or at least one of the cantilever beam fixing seat 21 and the retaining pad 12, so that the sensor 32 and the cantilever beam 22 maintain a fixed distance. Thus, when the entire cantilever load monitoring device is installed on the wind blade, the specific positional relationship of the distance is maintained. With the two specific positional relationships of central axis alignment and distance being maintained at the same time, the accuracy of the cantilever load monitoring device is increased and the false alarm situation is reduced.

[0047] Please continue reading. Figure 2-4 The cantilever beam fixing seat 21 has an installation channel 211 and at least one overflow channel 212; the cantilever beam fixing seat 21 includes a first mounting surface 213, a first reference surface 214 disposed opposite to the first mounting surface 213 and at least one overflow surface 215; the overflow channel 212 extends from the installation channel 211 to the overflow surface 215.

[0048] In some embodiments, the mounting channel 211 refers to the space for mounting the cantilever beam 22, which can be implemented using a through-hole structure with a cylindrical or rectangular cross-section. Its inner wall dimension forms a clearance fit with the outer diameter of the cantilever beam 22, and its axis is parallel to the mounting base plate 11. The overflow channel 212 refers to the guide groove extending from the mounting channel 211 to the outer surface of the cantilever beam fixing seat 21. The first reference surface 214 refers to the plane used for positioning with the mounting base plate 11, which can be implemented using a precision-machined plane. The overflow surface 215 refers to the lateral surface where the outlet of the overflow channel 212 is set, which can be implemented using the three surfaces of the cantilever beam fixing seat 21, and each overflow surface 215 can be provided with an overflow channel 212 outlet. The first assembly surface 213 is the mounting surface of the cantilever beam fixing seat 21 that contacts the monitored wind blade.

[0049] Understandably, during the installation of the cantilever beam 22, when the cantilever beam 22 with structural adhesive is pressed into the installation channel 211, excess adhesive can be discharged outward through the overflow channel 212. When multiple overflow channels 212 are set and evenly distributed within the cantilever beam fixing seat 21, the adhesive can form a reinforcing layer with better reinforcement effect within the installation channel 211. The first reference surface 214 can improve the positioning accuracy on the mounting base plate 11. The overflow surface 215 is set on the lateral non-reference surface of the cantilever beam fixing seat 21 to avoid the adhesive contaminating the reference surface and affecting the assembly accuracy. The cooperative design of the installation channel 211 and the overflow channel 212 not only ensures the uniformity of adhesive filling but also allows the solidified adhesive in the overflow channel 212 to reinforce the cantilever beam 22, making one end of the cantilever beam 22 more firmly installed and further preventing the central axis of the cantilever beam 22 from moving under its own weight or the influence of assembly and transportation.

[0050] Please continue reading. Figure 3 , Figure 4 , Figure 6 The cantilever beam 22 includes a beam body 221 and an installation section 222 disposed at one end of the beam body 221; the installation section 222 with structural adhesive is disposed in the installation channel 211 with structural adhesive, and the structural adhesive is squeezed into the overflow channel 212.

[0051] In some embodiments, beam 221 refers to the main structure that bears the load, which may be made of metal or composite materials and is used to transmit the mechanical signals generated by the deformation of the wind turbine blades; mounting section 222 refers to the part that connects to the cantilever beam fixing seat 21, which may be a cylindrical or rectangular cross-section structure and is used to realize the mechanical connection between the cantilever beam 22 and the fixing seat; structural adhesive refers to an adhesive with high bonding strength, which is used to fill the gap between mounting section 222 and mounting channel 211 to achieve fixation.

[0052] Specifically, during the assembly of the cantilever beam assembly 2, structural adhesive is pre-coated on the outer surface of the mounting section 222 and the inner wall of the mounting channel 211. When the mounting section 222 is inserted into the mounting channel 211, the structural adhesive is squeezed and discharged outward along the overflow channel 212, so that the adhesive layer is evenly distributed on the contact surface. This process avoids local accumulation or loss of adhesive through the guiding effect of the overflow channel 212, ensuring the consistency of the connection strength between the cantilever beam 22 and the fixed seat. Compared with the uneven adhesive layer thickness caused by using a single adhesive surface structure, this solution forms an adhesive flow path by setting the overflow channel 212, actively discharging excess adhesive during the assembly process, so that the adhesive interface forms a uniform adhesive layer distribution, thereby improving the reliability of the connection between the cantilever beam 22 and the fixed seat. In addition, the solidified adhesive in the overflow channel 212 can also reinforce the mounting section 222 from multiple directions.

[0053] Please continue reading. Figure 6 The cantilever beam 22 further includes a sensing section 223 disposed at the other end of the beam body 221; the sensing section 223 includes an adjusting screw 2231 and a sensing plate 2232 disposed at the end of the adjusting screw 2231; the beam body 221 has an adjusting hole 2211; the adjusting screw 2231 cooperates with the adjusting hole 2211.

[0054] In some embodiments, the adjusting screw 2231 refers to a threaded rod-shaped component, which may be made of metal and is used to adjust axial displacement by rotation; the sensing plate 2232 refers to a thin plate that cooperates with the sensor 32, which may be made of a material that is easily sensed by the sensor 32; the adjusting hole 2211 refers to a threaded through hole opened at the end of the beam 221, which may be made of a damped thread, used to accommodate the adjusting screw 2231 and restrict its movement; the sensing plate 2232 is fixed to the end of the beam 221 by the cooperation of the adjusting screw 2231 and the adjusting hole 2211.

[0055] In other embodiments, when the adjusting screw 2231 engages with the adjusting hole 2211, the rotational motion of the threaded pair can be converted into the axial displacement of the sensing element 2232, thereby precisely adjusting the relative position of the sensing element 2232 and the sensor 32.

[0056] Specifically, when the cantilever beam 22 deforms under load, the change in the distance between the sensing element 2232 and the sensor 32 is converted into an electrical signal output. The adjusting screw 2231 is screwed into the adjusting hole 2211 through a threaded connection. Rotating the screw can drive the sensing element 2232 to move along the axial direction of the beam 221. During the installation and commissioning stage, by finely adjusting the screw insertion depth, the initial distance between the sensing element 2232 and the sensor 32 can reach the set value. The length direction of the adjusting hole 2211 is parallel to the central axis of the beam 221, ensuring that the movement trajectory of the sensing element 2232 coincides with the axis of the sensor 32. This structure allows for micron-level spacing adjustment during device assembly, eliminating the influence of processing errors on monitoring accuracy. Thus, positional deviations caused by manufacturing tolerances can be corrected during the assembly stage, ensuring that the sensor 32 and the sensing element 2232 always maintain a precise alignment relationship.

[0057] It is understandable that when the cantilever load monitoring device is installed on the wind turbine blade, since the specific positions of the cantilever beam assembly 2 and the sensor assembly 3 have been adjusted at the factory, no major adjustments are needed. However, there are slight differences between the wind turbine blades being monitored. By reserving the adjustment screw 2231 and the adjustment hole 2211, the present invention can make targeted fine adjustments to different wind turbine blades to eliminate the impact of slight differences between different wind turbine blades on the monitoring accuracy.

[0058] Please continue reading. Figure 3 , Figure 4 The sensor mounting base 31 includes a sensor mounting part 311; the sensor 32 is axially adjustable and disposed on the sensor mounting part 311; the sensor mounting base 31 includes a second mounting surface 312 and a second reference surface 313 disposed opposite to the second mounting surface 312; the sensor locking part 33 includes a toothed washer 331 and a locking nut 332; the sensor 32 is fixed to the sensor mounting part 311 by the toothed washer 331 and the locking nut 332.

[0059] In some embodiments, the sensor mounting part 311 refers to the structure for mounting the sensor 32, which can be implemented by a sleeve structure with internal threads. The inner wall of the sleeve and the outer wall of the sensor 32 are fitted with a clearance or a thread, allowing the sensor 32 to move axially. The second mounting surface 312 refers to the mounting surface of the sensor fastener seat 31 in contact with the monitored wind blade. The second reference surface 313 refers to the plane used for positioning with the mounting base plate 11, which can be a precision-machined plane to achieve better flatness. The toothed pad 331 refers to an annular pad with an external tooth structure, which can be locked by meshing with the internal teeth of the locking nut 332 with a serrated surface to prevent loosening after locking. The locking nut 332 refers to the fastener used to press the toothed pad 331, which can be implemented by an internal tooth thread structure, and the axial position of the sensor 32 is fixed by rotation locking.

[0060] Specifically, the sensor 32 can be axially adjusted through the sensor mounting part 311 of the sleeve structure. After adjustment, the toothed pad 331 is fitted on the non-inductive end of the sensor 32, and the locking nut 332 is screwed into the external thread of the sleeve and presses the toothed pad 331 to prevent the locking nut 332 from loosening. The second reference surface 313 is in contact with the reference surface of the mounting base plate 11 to ensure that the central axis of the sensor mounting part 311 coincides with the central axis of the cantilever beam 22.

[0061] Please continue reading. Figure 3 , Figure 4 The retaining pad 12 includes a parallelism retaining block 121 and a locking block 122 detachably connected to the parallelism retaining block 121; the parallelism retaining block 121 has a third reference surface 1211 and a first slot 1212; the locking block 122 includes a second slot 1221; the cantilever beam 22 is fixed between the first slot 1212 and the second slot 1221.

[0062] In some embodiments, the parallelism retaining block 121 refers to a positioning component used to maintain the installation posture of the cantilever beam 22; the first slot 1212 is used to constrain the lateral displacement of the cantilever beam 22; the locking block 122 refers to a clamping component that cooperates with the parallelism retaining block 121, which can be implemented by a block structure with a second slot 1221, forming a closed clamping structure with the parallelism retaining block 121 through a detachable connection, and the second slot 1221 and the first slot 1212 together form a circumferential constraint on the cantilever beam 22; the detachable connection refers to an assembly method that allows the locking block 122 to be separated from the parallelism retaining block 121, which can be implemented by bolt connection or snap-fit ​​structure, facilitating the installation and maintenance of the cantilever beam 22.

[0063] Specifically, the parallelism retaining block 121 is in contact with the reference surface of the mounting base plate 11 through the third reference surface 1211; the cantilever beam 22 is precisely embedded in the first slot 1212 of the parallelism retaining block 121, and the locking block 122 forms a closed clamping structure with the parallelism retaining block 121 through the second slot 1221. When the locking block 122 and the parallelism retaining block 121 are fastened with bolts, the first slot 1212 and the second slot 1221 together form a three-dimensional constraint on the cantilever beam 22. During the installation process, the fixed state of the cantilever beam 22 can be controlled by adjusting the clamping force of the locking block 122. When it is necessary to install the cantilever load monitoring device on the monitored wind blade, it is only necessary to loosen the fasteners of the parallelism retaining block 121 and the mounting base plate 11 to simultaneously release the constraint of the locking block 122 on the cantilever beam 22, so that the cantilever beam 22 can be installed in the adjusted specific position.

[0064] Please continue reading. Figure 3 , Figure 4 , Figure 6The mounting base plate 11 includes a fourth reference surface 111, at least one cantilever beam positioning hole 112 for mounting the cantilever beam fixing seat 21 at one end, at least one sensor positioning hole 113 for mounting the sensor mounting bracket 31 at the other end, and at least one retaining pad positioning hole 114 between the cantilever beam positioning hole 112 and the sensor positioning hole 113. When the first reference surface 214 is in contact with the fourth reference surface 111 and the third reference surface 1211 is in contact with the fourth reference surface 111, the central axis of the cantilever beam 22 is parallel to the fourth reference surface 111. When the second reference surface 313 is in contact with the fourth reference surface 111, the central axis of the sensor mounting bracket 31 is parallel to the central axis of the cantilever beam 22.

[0065] Please continue reading. Figure 3 In some embodiments, the fourth reference surface 111 refers to a flat surface on the mounting base plate 11 used for contacting with reference surfaces of other components. Specifically, it can be achieved by precision grinding and serves as the reference plane for the installation of all components. The cantilever beam positioning hole 112 refers to the hole structure used to fix the cantilever beam fixing seat 21. Specifically, it can be achieved by threaded holes with positioning pins or high-precision through holes. The sensor positioning hole 113 refers to the hole structure used to fix the sensor fixing seat 31. Specifically, it can be achieved by threaded holes with positioning pins or high-precision through holes. The retaining pad positioning hole 114 refers to the mounting hole used to fix the retaining pad 12. Specifically, it can be achieved by threaded holes with positioning pins or high-precision through holes.

[0066] Specifically, the mounting base 11 serves as the foundation for all components. During assembly, the cantilever beam fixing seat 21 is fixed to one end of the mounting base 11 through the cantilever beam positioning hole 112, with its first reference surface 214 and fourth reference surface 111 fully in contact, ensuring that the mounting plane of the cantilever beam fixing seat 21 is parallel to the reference surface of the mounting base 11. When the retaining pad 12 is installed through the retaining pad positioning hole 114, its third reference surface 1211 is in contact with the fourth reference surface 111, so that the central axis of the cantilever beam 22 remains parallel to the reference surface of the mounting base 11 in the double-support state. The sensor mounting bracket 31 is installed to the other end of the mounting base 11 through the sensor positioning hole 113, with its second reference surface 313 in contact with the fourth reference surface 111, so that the central axis of the sensor mounting bracket 31 is automatically parallel to the central axis of the cantilever beam 22. Through the cooperation of multiple sets of reference surfaces, the relative positional relationship between the central axes of the cantilever beam 22 and the sensor 32 is directly determined during the assembly process without the need for secondary calibration.

[0067] Through the above technical solution, this application realizes the automatic calibration of the overlap between the cantilever beam 22 and the sensor 32 axis, and also solves the problem of reduced positioning accuracy caused by multiple adjustments in the traditional assembly process; during the installation process, it is only necessary to align the reference surfaces of each component with the reference surfaces of the mounting base plate 11 to complete the axis alignment, which significantly shortens the assembly time and improves the finished product qualification rate, ensuring that the installation position relationship of the load monitoring device on the wind blade meets the design requirements.

[0068] Please continue reading. Figure 4 In other embodiments, the retaining pad positioning holes 114 are designed in two locations, and the corresponding retaining pads 12 are also set in two locations, with the two retaining pads 12 respectively set at both ends of the beam 221. Under the combined action of the two retaining pads 12, the most important cantilever beam 22 is better fixed and the central axis is maintained in a specific position. Correspondingly, the cantilever beam positioning holes 112 in the mounting base plate 11 are cancelled, thereby eliminating the need to install fasteners in the secondary cantilever beam fixing seat 21. With this setting, the displacement caused by removing the fasteners from the cantilever beam fixing seat 21 after the cantilever load monitoring device is installed on the wind turbine can be avoided.

[0069] Please continue reading. Figure 2 , Figure 3 , Figure 4 The fixing component 1 further includes two lateral retaining strips 13 respectively disposed on both sides of the mounting base plate 11; the two lateral retaining strips 13 respectively restrict the position of the cantilever beam fixing seat 21, the sensor fastener seat 31 and the retaining pad 12 from both sides.

[0070] In some embodiments, the lateral retaining strip 13 refers to a strip-shaped limiting structure extending along both edges of the mounting base plate 11. Specifically, it can be integrally formed with the mounting base plate 11 through bending or die casting processes, or it can be a separate plate that is fixed to the mounting base plate 11 by fasteners or welding. The lateral retaining strip 13 restricts the lateral displacement of the cantilever beam fixing seat 21, sensor fastener seat 31 and retaining pad 12 in the plane of the mounting base plate 11 by physical blocking, further ensuring that each component maintains its initial installation position under vibration or impact conditions. In addition, the lateral retaining strip 13 also helps to improve the structural strength of the mounting base plate 11 itself, preventing the mounting base plate 11 from deforming during installation, transportation and other processes, thereby ensuring the reference function of the fourth reference surface 111.

[0071] Specifically, the lateral retaining strip 13 extends along the length of the mounting base plate 11, and its inner wall is in contact with the outer wall of the cantilever beam fixing seat 21, the retaining pad 12 and the sensor fastener seat 31. A three-dimensional constraint system is constructed through the double-sided limiting structure, which not only restricts the lateral displacement of each component, but also forms a composite positioning reference through the synergistic effect of the lateral retaining strip 13 and the mounting base plate 11, effectively eliminating component position drift caused by assembly gaps or material deformation.

[0072] Please continue reading. Figure 6 , Figure 7 The locking block 122 includes an upper end face 1222; when the upper end face 1222 coincides with the first assembly surface 213 or the second assembly surface 312, the cantilever beam 22 disengages from the second slot 1221.

[0073] Understandably, when the cantilever load monitoring device is installed on the wind turbine blade being monitored, the cantilever beam assembly 2 and sensor assembly 3, as necessary components for monitoring the wind turbine blade's condition, are fixed to the monitoring position of the wind turbine blade by applying adhesive to the first mounting surface 213 and the second mounting surface 312. The fixing assembly 1, as a retaining component at a specific position for the cantilever beam assembly 2 and sensor assembly 3, needs to be removed; specifically, this is achieved by unscrewing the positioning holes 112, 113, and 114 of the cantilever beam assembly 2 and sensor assembly 3. With fastener 14, the mounting base plate 11 can be removed. When the fastener of the parallelism retaining block 121 is removed, the parallelism retaining block 121 can be moved towards the mounting base plate 11 and removed directly. The locking block 122 can be moved towards the first mounting surface 213 or the second mounting surface 312. When the upper end surface 1222 coincides with the first mounting surface 213 or the second mounting surface 312, the cantilever beam 22 disengages from the second slot 1221, thereby removing the locking block 122 without affecting the cantilever beam 22.

[0074] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A cantilever load monitoring device, characterised in that, include: A cantilever beam assembly (2), wherein the cantilever beam assembly (2) includes a cantilever beam mounting base (21) and a cantilever beam (22); A sensor assembly (3); and A fixing component (1), wherein the fixing component (1) includes a mounting base plate (11) and at least one retaining pad (12) disposed on the mounting base plate (11). The cantilever beam assembly (2) and the sensor assembly (3) are respectively fixed to both ends of the mounting base plate (11), and the cantilever beam (22) is supported by the cantilever beam fixing seat (21) and the retaining pad (12) to maintain the relative position of the sensor assembly (3) and the cantilever beam (22).

2. The cantilever load monitoring device of claim 1, wherein: The sensor assembly (3) includes a sensor mounting base (31), a sensor locking part (33), and a sensor (32) that is axially adjustable and disposed on the sensor mounting base (31). The sensor mounting base (31) includes a sensor mounting part (311); the sensor (32) is axially adjustable and disposed in the sensor mounting part (311). The sensor firmware holder (31) includes a second mounting surface (312) and a second reference surface (313) disposed opposite to the second mounting surface (312). The sensor locking part (33) includes a toothed pad (331) and a locking nut (332); the sensor (32) is fixed to the sensor mounting part (311) via the toothed pad (331) and the locking nut (332).

3. The cantilever load monitoring device of claim 2, wherein: The mounting base plate (11) includes a fourth reference surface (111), at least one cantilever beam positioning hole (112) at one end, at least one sensor positioning hole (113) at the other end, and at least one retaining pad positioning hole (114) between the cantilever beam positioning hole (112) and the sensor positioning hole (113). The cantilever beam fixing seat (21) is fixed to the mounting base plate (11) through the cantilever beam positioning hole (112); the sensor fastener seat (31) is fixed to the mounting base plate (11) through the sensor positioning hole (113); and the retaining pad (12) is fixed to the mounting base plate (11) through the retaining pad positioning hole (114).

4. The cantilever load monitoring device according to claim 3, characterized in that: The retaining pad (12) includes a parallelism retaining block (121) and a locking block (122) detachably connected to the parallelism retaining block (121); The parallelism maintaining block (121) has a third reference surface (1211) and a first slot (1212); the locking block (122) has a second slot (1221).

5. The cantilever load monitoring device of claim 4, wherein: The cantilever beam fixing seat (21) has an installation channel (211) and at least one overflow channel (212). The cantilever beam (22) is fixed between the first slot (1212) and the second slot (1221).

6. The cantilever load monitoring device of claim 5, wherein: The cantilever beam (22) includes a beam body (221) and an installation section (222) disposed at one end of the beam body (221); the installation section (222) with structural adhesive is disposed in the installation channel (211) with structural adhesive, and the structural adhesive is squeezed into the overflow channel (212). The cantilever beam fixing seat (21) includes a first mounting surface (213), a first reference surface (214) disposed opposite to the first mounting surface (213), and at least one overflow surface (215); the overflow channel (212) extends from the mounting channel (211) to the overflow surface (215).

7. A cantilever load monitoring device according to claim 6, wherein: The cantilever beam (22) further includes a sensing section (223) disposed at the other end of the beam body (221); The sensing section (223) includes an adjusting screw (2231) and a sensing plate (2232) disposed at the end of the adjusting screw (2231); the beam (221) has an adjusting hole (2211); the adjusting screw (2231) is configured to cooperate with the adjusting hole (2211).

8. The cantilever load monitoring device of claim 6, wherein: When the first reference surface (214) is in contact with the fourth reference surface (111) and the third reference surface (1211) is in contact with the fourth reference surface (111), the central axis of the cantilever beam (22) is parallel to the fourth reference surface (111). When the second reference surface (313) is in contact with the fourth reference surface (111), the central axis of the sensor mounting base (31) remains parallel to the central axis of the cantilever beam (22).

9. The cantilever load monitoring device of claim 8, wherein: The locking block (122) includes an upper end face (1222); when the upper end face (1222) coincides with the first reference surface (214) or the second reference surface (313), the cantilever beam (22) disengages from the second slot (1221).

10. The cantilever load monitoring device of claim 2, wherein: The fixing component (1) further includes two lateral retaining strips (13) respectively disposed on both sides of the mounting base plate (11); the two lateral retaining strips (13) respectively restrict the position of the cantilever beam fixing seat (21), sensor fastener seat (31) and retaining pad (12) from both sides.

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