Wind turbine generator set clearance measuring device

Abstract

The invention provides a wind turbine generator clearance measuring device, which comprises a control main body, a radar and a radar controller, and is characterized in that the radar controller comprises a connecting part and a radar adjusting mechanism arranged at at least one end of the connecting part, so that the control main body and the radar can be mounted conveniently, and the position of the radar can be adjusted; wherein the double-position control part and the connecting part can deflect relatively, when the double-position control part and the connecting part deflect relatively, the elevation angle of the radar can be driven to change, so that detection waves emitted by the radar can point to a specified fan blade area, and the double-position control part is located between the two deflection angle adjusting blocks and can rotate so as to adjust the deflection angle of the radar. The detection waves emitted by the radar avoid the cabin and the tower pole, so that the effective detection waves acting on the fan blades are increased, the clearance monitoring error is reduced, the radar obtains more return data under the cooperation of the deflection angle and elevation angle double-position control, and the clearance monitoring error is smaller.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a wind turbine clearance measuring device. Background Art

[0002] The clearance value of a wind turbine refers to the distance between the blades and the tower. When the distance between the two is too small, a tower sweep accident is likely to occur, causing damage to the wind turbine. Therefore, it is necessary to install a clearance measurement device in the nacelle of the wind turbine. The clearance value can be monitored in real time by emitting detection waves through the clearance measurement device.

[0003] In the prior art, the clearance measuring device is generally installed in the cabin of the wind turbine. At this time, since the deflection angle of the clearance measuring device and the wind turbine cannot be adjusted, part of the detection wave emitted by the clearance measuring device will be blocked by the cabin and the tower, which reduces the effective detection wave used to detect the blades, thereby causing a large error in clearance monitoring. In addition, the existing clearance measuring device lacks precise elevation adjustment function, which makes it difficult to adjust the angle of the detection wave irradiating the wind blade and the adjustment accuracy is low, which makes it impossible to irradiate the designated wind blade area, further increasing the error in clearance monitoring. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a wind turbine clearance measuring device which can adjust the elevation angle and the deflection angle and monitor the clearance value more accurately.

[0005] The technical solution adopted by the present invention to solve the above problem is: a wind turbine clearance measurement device, comprising a control body, a radar and a radar controller arranged between the control body and the radar; The radar controller includes a connecting portion, and a radar adjustment mechanism disposed at at least one end of the connecting portion; The radar adjustment mechanism includes a two-position control part; the two-position control part is arranged on one side of the connecting part and can be deflected relative to the connecting part; the radar is fixedly connected to the connecting part or the two-position control part; deflection angle adjustment blocks are arranged on both sides of the two-position control part; the two-position control part is arranged to be rotatable between two deflection angle adjustment blocks, when the two-position control part and the connecting part are relatively deflected, the elevation angle of the radar changes so that the detection wave emitted by the radar illuminates the designated area, and when the two-position control part rotates between the two deflection angle adjustment blocks, the deflection angle of the radar changes so that the detection wave emitted by the radar avoids the cabin and the tower.

[0006] Compared with the prior art, the present invention includes a control body, a radar and a radar controller, and the radar controller includes a connecting part and a radar adjustment mechanism arranged at at least one end of the connecting part, so that the control body and the radar can be installed on both sides of the radar controller, and the position of the radar can be adjusted by the radar adjustment mechanism, so that the detection wave emitted by the radar can avoid the cabin and the tower, and can be irradiated to the appropriate position of the wind blade; the radar adjustment mechanism includes a two-position control part and a deflection angle adjustment block, wherein the two-position control part and the connecting part can be relatively deflected, and when the two are relatively deflected, the elevation of the radar can be driven. The angle changes, so that the detection wave emitted by the radar can be directed to the designated wind blade area; the dual-position control unit is located between the two deflection angle adjustment blocks and is rotatable. When the dual-position control unit rotates between the two deflection angle adjustment blocks, the deflection angle of the radar can be changed, so that the radar is deflected to one side of the cabin and the tower, so that the detection wave emitted by the radar avoids the cabin and the tower, thereby increasing the effective detection wave acting on the wind blade and reducing the error of clearance monitoring; with the cooperation of the dual-position control of the deflection angle and the elevation angle, the radar obtains more return data, thereby making the clearance monitoring error smaller.

[0007] The present invention provides a wind turbine clearance measuring device, wherein the deflection angle adjustment block includes a deflection angle fine adjustment structure; the deflection angle fine adjustment structure includes a deflection angle adjustment rod, and a deflection angle adjustment push block used to push the two-position control part to rotate between the two deflection angle adjustment blocks; the deflection angle adjustment rod is used to push the deflection angle adjustment push block to move in the deflection angle adjustment block.

[0008] A wind turbine clearance measuring device of the present invention, wherein the deflection angle adjustment block comprises an upper block and a lower block; the upper block has a push block slide groove and a first arc groove arranged at the bottom of the push block slide groove; the upper block further comprises a deflection angle adjustment shaft movably connected to the push block slide groove and the first arc groove; the lower block comprises a deflection angle rotation shaft; The dual-position control part includes two first deflection angle adjustment holes and two second deflection angle adjustment holes arranged on both sides; the two deflection angle rotation shafts are respectively matched with the two first deflection angle adjustment holes; the two deflection angle adjustment shafts are respectively matched with the two second deflection angle adjustment holes through the push block slide groove and the first arc groove.

[0009] The present invention provides a wind turbine clearance measuring device, wherein the deflection angle adjustment rod is arranged on one side of the push block slide slot, and the deflection angle adjustment push block is arranged in the push block slide slot; the deflection angle adjustment push block includes a first slot hole; and the deflection angle adjustment shaft is arranged in the first slot hole.

[0010] The present invention provides a wind turbine clearance measuring device, wherein the deflection angle adjustment block further includes side block bodies arranged on both sides; fasteners are provided in the side block bodies so that the deflection angle adjustment block can be installed on the control body or radar through the fasteners.

[0011] The present invention provides a wind turbine clearance measuring device, wherein the dual-position control part includes an elevation fine-adjustment structure arranged on the front end surface; the elevation fine-adjustment structure includes a base block, an elevation push rod arranged in the base block, and an elevation adjustment push block used to push the dual-position control part and the connecting part to undergo relative deflection; the elevation push rod is used to push the elevation adjustment push block to move.

[0012] The present invention provides a wind turbine clearance measuring device, wherein the connecting portion includes an elevation rotation shaft and an elevation adjustment shaft; the dual-position control portion includes an elevation adjustment hole and a second arc groove; the elevation rotation shaft cooperates with the elevation adjustment hole; and the elevation adjustment shaft cooperates with the second arc groove.

[0013] The present invention provides a wind turbine clearance measuring device, wherein the elevation angle fine-tuning structure further includes an elevation angle fine-tuning rod; the elevation angle adjustment push block includes a second slot hole; the dual-position control portion includes a third arc-shaped slot; the elevation angle fine-tuning rod passes through the second slot hole and the third arc-shaped slot and is connected to the connecting portion.

[0014] The present invention provides a wind turbine clearance measuring device, wherein the control body comprises a mounting plate, a shell arranged on the mounting plate, and an inner cavity arranged between the mounting plate and the shell; the control body also comprises a partition, which separates the inner cavity into a control cavity and an adjustment cavity; the adjustment cavity is used to accommodate the radar adjustment mechanism.

[0015] The present invention provides a wind turbine clearance measuring device, wherein the mounting plate comprises an adjustment slot, the connecting portion and the two-position control portion extend into the adjustment cavity through the adjustment slot; the upper block and the side block are arranged in the adjustment cavity, the lower block passes through the adjustment slot; and the side block is connected to the mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a perspective perspective schematic diagram of the present invention; Figure 2 It is another perspective perspective schematic diagram of the present invention; Figure 3 It is a cross-sectional schematic diagram of the present invention; Figure 4 It is an enlarged schematic diagram of the radar adjustment mechanism; Figure 5 This is a schematic diagram of the main view of the present invention after the control body is hidden; Figure 6 This is an exploded schematic diagram of the present invention after the control body is hidden; Figure 7 This is a schematic diagram of the present invention in use after the elevation angle is adjusted; Figure 8 This is a schematic diagram of the use state of the present invention after the deflection angle is adjusted. DETAILED DESCRIPTION

[0017] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The present invention can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0018] Furthermore, on the first aspect, in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0019] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

[0020] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0021] See also Figure 1-7A wind turbine clearance measuring device shown in the figure comprises a control body 1, a radar 2 and a radar controller 3 arranged between the control body 1 and the radar 2; the radar controller 3 comprises a connecting part 31 and a radar adjustment mechanism 32 arranged at at least one end of the connecting part 31; the radar adjustment mechanism 32 comprises a two-position control part 321; the two-position control part 321 is arranged on one side of the connecting part 31 and can be deflected relative to the connecting part 31; the radar 2 is fixedly connected to the connecting part 31 or the two-position control part 321; a deflection angle adjustment block 322 is arranged on both sides of the two-position control part 321; the two-position control part 321 is arranged to be rotatable between two deflection angle adjustment blocks 322, when the two-position control part 321 and the connecting part 31 are relatively deflected, the elevation angle of the radar 2 changes, so that the detection wave emitted by the radar 2 irradiates the designated area, and when the two-position control part 321 rotates between the two deflection angle adjustment blocks 322, the deflection angle of the radar 2 changes, so that the detection wave emitted by the radar 2 avoids the cabin and the tower.

[0022] Specifically, the present invention includes a control body 1, a radar 2 and a radar controller 3, and the radar controller 3 includes a connecting part 31 and a radar adjusting mechanism 32 arranged at at least one end of the connecting part 31, so that the control body 1 and the radar 2 are installed on both sides of the radar controller 3, and the position of the radar 2 is adjusted by the radar adjusting mechanism 32, so that the detection wave emitted by the radar 2 can avoid the cabin and the tower, and can be irradiated to the appropriate position of the wind blade; the radar adjusting mechanism 32 includes a two-position control part 321 and a deflection angle adjustment block 322, wherein the two-position control part 321 and the connecting part 31 can be relatively deflected, and when the two are relatively deflected, they can bring The elevation angle of the radar 2 is changed, so that the detection wave emitted by the radar 2 can be directed to the specified wind blade area. The dual-position control unit 321 is located between the two deflection angle adjustment blocks 322 and is rotatable. When the dual-position control unit 321 rotates between the two deflection angle adjustment blocks 322, the deflection angle of the radar 2 can be driven to change, so that the radar 2 is deflected to one side of the cabin and the tower, so that the detection wave emitted by the radar 2 avoids the cabin and the tower, thereby increasing the effective detection wave acting on the wind blade and reducing the error of clearance monitoring. With the cooperation of the dual-position control of the deflection angle and the elevation angle, the radar obtains more return data, thereby making the clearance monitoring error smaller.

[0023] It is worth mentioning that, in this embodiment, a radar adjustment mechanism 32 is provided at the upper end of the connecting part 31, and the lower end is fixedly connected to the radar 2, and the control body 1 is connected to the radar adjustment mechanism 32; during installation, the control body 1 is installed inside the cabin to obtain the protection of the cabin and obtain the power supply and data connection inside the cabin, and the radar 2 and the radar controller 3 extend from the cabin. During adjustment, a force is applied to the radar 2 or the connecting part 31 to adjust the radar 2 to a suitable elevation angle and deflection angle.

[0024] It can be understood that in other embodiments, for example, when the space in the cabin is limited and cannot accommodate the radar adjustment mechanism 32, or when the space below the control body 1 is limited and cannot coexist with the radar adjustment mechanism 32, the radar adjustment mechanism 32 can be arranged at the lower end of the connecting portion 31; under this arrangement, the upper end of the connecting portion 31 is fixedly connected to the control body 1, and the radar adjustment mechanism 32 is connected to the radar 2; when installed, the radar 2 extends out of the cabin, and when adjusted, a force is applied to the radar 2 to adjust the radar 2 to a suitable elevation angle and deflection angle; in addition, for example, when the angle adjustment range of a single set of radar adjustment mechanisms 32 is limited, a set of radar adjustment mechanisms 32 can be arranged on each of the connecting portions 31. Under this arrangement, the control body 1 and the radar 2 are respectively connected to the radar adjustment mechanisms 32 at the upper and lower ends. When adjusted, the elevation angles and deflection angles at the upper and lower ends can be superimposed by adjusting the two sets of radar adjustment mechanisms 32 to make the radar 2 have a larger elevation angle and deflection angle.

[0025] Please continue reading Figure 3 , Figure 4 , wherein the deflection angle adjustment block 322 includes a deflection angle fine-adjustment structure 3221; the deflection angle fine-adjustment structure 3221 includes a deflection angle adjustment rod 32211, and a deflection angle adjustment push block 32212 used to push the dual-position control unit 321 to rotate between the two deflection angle adjustment blocks 322; the deflection angle adjustment rod 32211 is used to push the deflection angle adjustment push block 32212 to move in the deflection angle adjustment block 322.

[0026] By setting the deflection angle fine-tuning structure 3221, when adjusting the deflection angle of the radar 2, the deflection angle adjustment push block 32212 can be slowly driven by the action of the deflection angle adjustment rod 32211, and then the dual-position control unit 321 can be slowly driven to rotate between the two deflection angle adjustment blocks 322, so that the deflection angle adjustment is more precise, and the detection wave emitted by the radar 2 can avoid the cabin and the tower at a better angle.

[0027] Please continue reading Figure 3 , Figure 4 , Figure 6 , wherein the deflection angle adjustment block 322 includes an upper block 3222 and a lower block 3223; the upper block 3222 has a push block slide 32221 and a first arc groove 32222 arranged at the bottom of the push block slide 32221; the upper block 3222 further includes a deflection angle adjustment shaft 32223 movably connected to the push block slide 32221 and the first arc groove 32222; the lower block 3223 includes a deflection angle rotation shaft 32231; The dual-position control part 321 includes two first deflection angle adjustment holes 3211 and two second deflection angle adjustment holes 3212 arranged on both sides; two deflection angle rotation shafts 32231 respectively cooperate with the two first deflection angle adjustment holes 3211; two deflection angle adjustment shafts 32223 respectively cooperate with the two second deflection angle adjustment holes 3212 via the push block slide groove 32221 and the first arc groove 32222.

[0028] Specifically, when the double-position control part 321 is arranged between the two deflection angle adjustment blocks 322, it rotates with the deflection angle shafts 32231 on both sides as the rotation axes. The two deflection angle adjustment shafts 32223 cooperate with the two push block slots 32221, the first arc groove 32222 and the second deflection angle adjustment hole 3212 respectively, so that the rotation action of the double-position control part 321 is more stable, and the rotation range of the double-position control part 321 is set according to the angle of the first arc groove 32222; the setting of the push block slot 32221 provides the deflection angle adjustment push block 32212 with movement space, so that the deflection angle fine-tuning structure 3221 can play a deflection angle fine-tuning role.

[0029] Please continue reading Figure 4 , Figure 6 , wherein the deflection angle adjustment rod 32211 is arranged on one side of the push block slide slot 32221, and the deflection angle adjustment push block 32212 is arranged in the push block slide slot 32221; the deflection angle adjustment push block 32212 includes a first slot hole 322121; and the deflection angle adjustment shaft 32223 is arranged in the first slot hole 322121.

[0030] It can be understood that, in the present embodiment, the outline of the push block slot 32221 is constructed as a rectangle, and the outline of the deflection angle adjustment push block 32212 is also constructed as a rectangle, and the dimensions of the two in the width direction fit each other, and the push block slot 32221 is larger than the deflection angle adjustment push block 32212 in the length direction. Under this arrangement, when the deflection angle adjustment rod 32211 moves, the deflection angle adjustment push block 32212 can move stably and smoothly in the push block slot 32221 synchronously, thereby ensuring the accuracy of the deflection angle adjustment; in addition, the deflection angle adjustment shaft 32223 is arranged in the first slot hole 322121, and the first slot hole 322121 has a certain extension in the aforementioned width direction, so that when the deflection angle adjustment shaft 32223 slides along the first arc slot 32222, it can move in the aforementioned width direction to avoid the deflection angle adjustment shaft 32223 from getting stuck.

[0031] It is worth mentioning that, in different embodiments, the deflection angle fine-tuning structure 3221 can be designed to exist only in one of the deflection angle adjustment blocks 322. When the user adjusts the deflection angle through the aforementioned deflection angle fine-tuning structure 3221, since the dual-position control part 321 rotates around the coaxial deflection angle shaft 32231 on both sides, adjustment from one side is beneficial to ensure the consistency of the angles on both sides of the dual-position control part 321; it can be understood that the deflection angle fine-tuning structure 3221 can also be designed to have two deflection angle adjustment blocks 322, so as to facilitate adjustment from both sides, thereby overcoming the angle deviation on both sides caused by parts error or assembly error, and making the deflection angle fine-tuning degree higher.

[0032] Furthermore, the movement of the deflection angle adjustment rod 32211 can be manually adjusted by hand tools, such as by a screwdriver, or can be electrically adjusted by an external electric adjustment device, such as by setting a motor gear structure at the adjustment end of the deflection angle adjustment rod 32211 so as to adjust it by a motor.

[0033] Please continue reading Figure 3 , Figure 4 , wherein the deflection angle adjustment block 322 further includes side block bodies 3224 arranged on both sides; fasteners are provided in the side block bodies 3224 so that the deflection angle adjustment block 322 can be installed on the control body 1 or the radar 2 through the fasteners.

[0034] By providing the two side blocks 3224, the deflection angle adjustment block 322 can be firmly connected to the control body 1 or the radar 2 through the fasteners on both sides, thereby ensuring stable deflection angle adjustment.

[0035] Please continue reading Figure 5 , Figure 6 , wherein the dual-position control part 321 includes an elevation fine-tuning structure 3213 arranged on the front end surface; the elevation fine-tuning structure 3213 includes a base block 32131, an elevation push rod 32132 arranged in the base block 32131, and an elevation adjustment push block 32133 used to push the dual-position control part 321 and the connecting part 31 to cause relative deflection; the elevation push rod 32132 is used to push the elevation adjustment push block 32133 to move.

[0036] By setting the elevation angle fine-tuning structure 3213, when adjusting the elevation angle of the radar 2, the elevation angle push rod 32132 can slowly drive the elevation angle adjustment push block 32133 through the movement of the base block 32131, and then slowly drive the connecting part 31 and the dual-position control part 321 to deflect, so that the elevation angle adjustment is more precise, and the detection wave emitted by the radar 2 can be directed to the specified blade area at a more precise angle.

[0037] Please continue reading Figure 5 , Figure 6, wherein the connecting portion 31 includes an elevation rotation axis 311 and an elevation adjustment axis 312; the dual-position control portion 321 includes an elevation adjustment hole 3214 and a second arc groove 3215; the elevation rotation axis 311 cooperates with the elevation adjustment hole 3214; and the elevation adjustment axis 312 cooperates with the second arc groove 3215.

[0038] Specifically, when the connecting part 31 and the two-position control part 321 are deflected, they rotate with the elevation angle axis 311 as the rotation axis. Through the cooperation of the elevation angle adjustment axis 312 and the second arc groove 3215, the deflection action of the connecting part 31 and the two-position control part 321 is made more stable, and the deflection range of the connecting part 31 and the two-position control part 321 is set according to the angle of the second arc groove 3215.

[0039] Please read further Figure 5 , Figure 6 , wherein the elevation fine-tuning structure 3213 further includes an elevation fine-tuning rod 32134; the elevation adjustment push block 32133 includes a second slot hole 321331; the two-position control portion 321 includes a third arc-shaped slot 3216; the elevation fine-tuning rod 32134 passes through the second slot hole 321331 and the third arc-shaped slot 3216, and is connected to the connecting portion 31.

[0040] Specifically, when the elevation push rod 32132 moves in the base block 32131, it can synchronously drive the elevation adjustment push block 32133 to move. At this time, the second slot 321331 pushes the elevation fine-tuning rod 32134 to move in the third arc groove 3216, so that the elevation fine-tuning rod 32134 can slowly and steadily push the connecting part 31 to deflect along the arc direction set by the third arc groove 3216, thereby making the radar 2 reach a suitable elevation angle; in addition, the second slot 321331 has a certain extension in the length direction, so that when the elevation fine-tuning rod 32134 slides along the third arc groove 3216, it can move in the aforementioned length direction to avoid the elevation fine-tuning rod 32134 from getting stuck.

[0041] Furthermore, the movement of the elevation push rod 32132 in the base block 32131 can be manually adjusted by hand tools, such as by a screwdriver, or can be electrically adjusted by an external electric adjustment device, such as providing a motor gear structure at the adjustment end of the elevation push rod 32132 so that it can be adjusted by a motor.

[0042] Please continue reading Figure 1-3 , wherein the control body 1 includes a mounting plate 11, a shell 12 arranged on the mounting plate 11, and an inner cavity 13 arranged between the mounting plate 11 and the shell 12; the control body 1 also includes a partition 14, which separates the inner cavity 13 into a control cavity 131 and an adjustment cavity 132; the adjustment cavity 132 is used to accommodate the radar adjustment mechanism 32.

[0043] In this embodiment, the mounting plate 11 is connected to the shell of the cabin through fasteners so that the present invention can be firmly fixed on the wind turbine set; the partition 14 divides the inner cavity 13 into a control cavity 131 and an adjustment cavity 132, wherein the control cavity 131 is used to accommodate the control module of the radar 2, and the adjustment cavity 132 is used to accommodate the radar adjustment mechanism 32. Since the radar 2 and the radar adjustment mechanism 32 need to extend out of the cabin, through this arrangement, the control module with electronic components can be separated from the radar adjustment mechanism 32, and the control module can be protected in the control cavity 131 to prevent water vapor and dust in the external environment from entering the control cavity 131 and affecting the life of the control module.

[0044] Please read further Figure 1-3 , wherein the mounting plate 11 includes an adjustment slot 111, the connecting portion 31 and the two-position control portion 321 extend into the adjustment cavity 132 through the adjustment slot 111; the upper block 3222 and the side block 3224 are arranged in the adjustment cavity 132, and the lower block 3223 passes through the adjustment slot 111; the side block 3224 is connected to the mounting plate 11.

[0045] Specifically, through the setting of the adjustment slot 111, the connecting part 31 and the two-position control part 321 can be set to a suitable length according to needs, and extend from the outside to the adjustment cavity 132 through the adjustment slot 111; the deflection angle adjustment block 322 is fixed to the mounting plate 11 through the side block bodies 3224 on both sides, and the connection strength is relatively high, so as to ensure the stable connection and adjustment of the two-position control part 321, the connecting part 31 and the radar 2.

[0046] Please continue reading Figure 7 , Figure 8 During actual clearance monitoring, a wind turbine clearance measuring device of the present invention can be used in the following method: the radar controller 3 is used to adjust the angle of the radar 2 so that the detection wave emitted by the radar 2 points to the detection area; the radar 2 emits a detection wave to illuminate the middle of the blade, and the middle of the blade reflects the detection wave signal, so that the radar 2 collects the data of the middle of the blade and judges the data of the middle of the blade; the collected data of the middle of the blade is filtered to obtain filtered data, and the filtered data is fitted to obtain blade tip fitting data; the minimum clearance value of the blade tip is calculated through the blade tip fitting data; and the minimum clearance value data is output.

[0047] Specifically, Figure 7 The figure shows the use of the present invention in which the radar controller 3 adjusts the elevation angle to ∠C so that the detection wave points to the middle of the blade; Figure 8 The figure shows the use condition of the present invention in which the radar controller 3 adjusts the deflection angle to ∠D so that the detection wave avoids the tower.

[0048] When the above method is actually used, the present invention adjusts the angle of radar 2 so that the detection wave emitted by radar 2 can avoid the cabin and the tower and irradiate the detection area, thereby increasing the effective millimeter wave acting on the blade and reducing the clearance value monitoring error; the detection wave emitted by radar 2 illuminates the middle of the blade, so that radar 2 obtains more return data than irradiating the blade tip, and the data of the middle of the blade is judged and filtered to eliminate abnormal data in the middle of the blade, so as to provide a more accurate data source for subsequent blade tip fitting, so that the blade tip fitting data is closer to the actual situation; the blade tip fitting data is obtained to calculate the minimum clearance value of the blade tip, so as to obtain a more accurate clearance value with smaller error.

[0049] It is worth mentioning that the judgment of radar 2 blade middle data and the elimination of abnormal data in the blade middle include the following situations: Step 1: If radar 2 collects data in stages, and the number of data frames collected in each stage is within the set range, data processing is performed according to the actual number of data frames; if radar 2 collects data continuously, no data processing is performed.

[0050] Ideally, when no blades enter the illumination area of ​​Radar 2, Radar 2 has no data. When blades enter the illumination area of ​​Radar 2, Radar 2 starts to have blade data until the blades leave the illumination area, and Radar 2 returns to having no data. Since the wind turbine is equipped with multiple blades, the normal performance of Radar 2 should be to collect data within the set range in stages. Under normal circumstances, data processing is performed according to the actual number of data frames, and all frames obtained in each stage are merged. However, in rainy, foggy weather or other abnormal conditions, Radar 2 will show that data is collected continuously, and no data processing is performed under these abnormal conditions.

[0051] Step 2: After completing step 1, it should also be considered whether the merged data point is the data returned by the blade or other interference data. For example, when radar 2 collects the interim data of the wind blade, if there are birds, insects, etc. flying over the irradiation area, it will have a greater impact on the overall data; therefore, the following processing is performed in step 23: Since the reflection area near the blade root is large, the rigidity is strong, the signal is stable and has little interference, when the blade enters the illumination area of ​​radar 2, radar 2 can illuminate the blade root position every time. Therefore, the area at a distance before and after the blade root can be set as the reference illumination area to determine whether it is a blade signal. When the signal point meets the stage data in step 1 but is outside the set illumination area, it will be eliminated.

[0052] Step 3: Use a cubic polynomial to perform the first fitting on step 2. Based on the fact that the deformation of the blade is continuous and stable, and that a cubic polynomial can be used to fit various postures of the blade, the jump points with large deviations from the aforementioned cubic polynomial can be filtered out.

[0053] Step 4: Use a cubic polynomial to perform a second fit on the second coordinate data set; since the blade size at the tip of the blade decreases sharply and it is far away from radar 2, the radar 2 signal is weak; and the blade tip is easily affected by the wind during the operation of the blade, resulting in large fluctuations in relative position, which causes interference points in the radar 2 signal; a threshold is set according to the strength of the signal measured by radar 2, and points with signal strength below the threshold are eliminated.

[0054] After the above four steps of data filtering, more realistic data of the middle part of the blade can be obtained. These data are used for fitting, so that the blade tip fitting data is closer to the actual situation. The blade tip fitting data is obtained to calculate the minimum clearance value of the blade tip, thereby obtaining a more accurate clearance value with smaller error.

[0055] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A wind turbine clearance measurement device, characterized in that: It comprises a control body (1), a radar (2), and a radar controller (3) arranged between the control body (1) and the radar (2); The radar controller (3) comprises a connecting portion (31), and a radar adjustment mechanism (32) arranged at at least one end of the connecting portion (31); The radar adjustment mechanism (32) comprises a two-position control unit (321); the two-position control unit (321) is arranged on one side of the connecting unit (31) and is deflectable relative to the connecting unit (31); the radar (2) is fixedly connected to the connecting unit (31) or the two-position control unit (321); a deflection angle adjustment block (322) is provided on both sides of the two-position control unit (321); the two-position control unit (321) is arranged to be rotatable between two deflection angle adjustment blocks (322); when the two-position control unit (321) and the connecting unit (31) are relatively deflected, the elevation angle of the radar (2) changes, so that the detection wave emitted by the radar (2) irradiates a designated area; and when the two-position control unit (321) rotates between the two deflection angle adjustment blocks (322), the deflection angle of the radar (2) changes, so that the detection wave emitted by the radar (2) avoids the cabin and the tower.

2. The wind turbine clearance measuring device according to claim 1, characterized in that: The deflection angle adjustment block (322) comprises a deflection angle fine adjustment structure (3221); the deflection angle fine adjustment structure (3221) comprises a deflection angle adjustment rod (32211) and a deflection angle adjustment push block (32212) used for pushing the two-position control unit (321) to rotate between the two deflection angle adjustment blocks (322); the deflection angle adjustment rod (32211) is used for pushing the deflection angle adjustment push block (32212) to move in the deflection angle adjustment block (322).

3. The wind turbine clearance measuring device according to claim 2, characterized in that: The deflection angle adjustment block (322) comprises an upper block (3222) and a lower block (3223); the upper block (3222) comprises a push block slide groove (32221) and a first arc-shaped groove (32222) arranged at the bottom of the push block slide groove (32221); the upper block (3222) further comprises a deflection angle adjustment shaft (32223) movably connected to the push block slide groove (32221) and the first arc-shaped groove (32222); the lower block (3223) comprises a deflection angle rotation shaft (32231); The two-position control portion (321) comprises two first deflection angle adjustment holes (3211) and two second deflection angle adjustment holes (3212) arranged on two sides; the two deflection angle rotation shafts (32231) respectively cooperate with the two first deflection angle adjustment holes (3211); and the two deflection angle adjustment shafts (32223) respectively cooperate with the two second deflection angle adjustment holes (3212) via the push block sliding groove (32221) and the first arc groove (32222).

4. The wind turbine clearance measuring device according to claim 3 is characterized in that: The deflection angle adjustment rod (32211) is arranged on one side of the push block slide groove (32221), and the deflection angle adjustment push block (32212) is arranged in the push block slide groove (32221); the deflection angle adjustment push block (32212) includes a first slot hole (322121); and the deflection angle adjustment shaft (32223) is arranged in the first slot hole (322121).

5. The wind turbine clearance measuring device according to claim 4, characterized in that: The deflection angle adjustment block (322) further comprises side block bodies (3224) arranged on both sides; fasteners are provided in the side block bodies (3224), so that the deflection angle adjustment block (322) can be mounted on the control body (1) or the radar (2) via the fasteners.

6. The wind turbine clearance measuring device according to claim 1, characterized in that: The two-position control part (321) comprises an elevation fine adjustment structure (3213) arranged on the front end surface; the elevation fine adjustment structure (3213) comprises a base block (32131), an elevation push rod (32132) arranged in the base block (32131), and an elevation adjustment push block (32133) used to push the two-position control part (321) and the connecting part (31) to cause relative deflection; the elevation push rod (32132) is used to push the elevation adjustment push block (32133) to move.

7. The wind turbine clearance measuring device according to claim 6, characterized in that: The connecting portion (31) comprises an elevation rotation shaft (311) and an elevation adjustment shaft (312); the dual-position control portion (321) comprises an elevation adjustment hole (3214) and a second arc-shaped groove (3215); the elevation rotation shaft (311) matches the elevation adjustment hole (3214); and the elevation adjustment shaft (312) matches the second arc-shaped groove (3215).

8. The wind turbine clearance measuring device according to claim 7, characterized in that: The elevation angle fine-adjustment structure (3213) further comprises an elevation angle fine-adjustment rod (32134); the elevation angle adjustment push block (32133) comprises a second slot hole (321331); the two-position control portion (321) comprises a third arc-shaped slot (3216); the elevation angle fine-adjustment rod (32134) passes through the second slot hole (321331) and the third arc-shaped slot (3216), and is connected to the connecting portion (31).

9. The wind turbine clearance measuring device according to claim 5, characterized in that: The control body (1) comprises a mounting plate (11), a housing (12) arranged on the mounting plate (11), and an inner cavity (13) arranged between the mounting plate (11) and the housing (12); the control body (1) further comprises a partition (14), wherein the partition (14) separates the inner cavity (13) into a control cavity (131) and an adjustment cavity (132); the adjustment cavity (132) is used to accommodate the radar adjustment mechanism (32).

10. The wind turbine clearance measuring device according to claim 9, characterized in that: The mounting plate (11) comprises an adjustment slot (111), the connecting portion (31) and the two-position control portion (321) extending into the adjustment cavity (132) through the adjustment slot (111); the upper block (3222) and the side block (3224) are arranged in the adjustment cavity (132), and the lower block (3223) passes through the adjustment slot (111); and the side block (3224) is connected to the mounting plate (11).

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