Wind power system and wind power blade detection method

Abstract

The invention discloses a wind power system and a wind power blade detection method, and relates to the technical field of wind power generation, the wind power system comprises a wind power blade, an elastic air bag, an air supply device, an image acquisition device and an image analysis module, the wind power blade is provided with a suction surface and a pressure surface which are oppositely arranged along the thickness direction, and a front edge and a rear edge which are oppositely arranged along the width direction; the elastic air bag is arranged on the pressure face and comprises a first bag body and a second bag body, and the first bag body and the second bag body define an inflation cavity. The air supply device supplies air to the inflation cavity so that the elastic air bag can be inflated and expanded. The image acquisition device is used for acquiring an actual measurement image of the elastic airbag; and the image analysis module is used for superposing the actual measurement image and the standard image on the same display surface, and outputting a damage prompt signal when the coverage area of the actual measurement image is larger than that of the standard image. According to the scheme, the technical problem that the damaged elastic material for realizing load reduction on the wind power blade cannot be found in time, so that the load reduction effect is influenced, and the blade is damaged due to overload can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power system and a wind power blade detection method. Background Art

[0002] In the field of wind power generation, wind turbine blades, as core components of wind turbines, have a crucial impact on power generation efficiency and equipment lifespan. Large-scale wind turbines are increasingly being deployed in harsh environments such as the Gobi Desert. While these regions are rich in wind energy resources, they often experience extreme wind speeds, posing a significant challenge to the proper operation of wind turbine blades.

[0003] In extreme wind conditions, the load on wind turbine blades increases significantly, potentially causing them to rotate too quickly. Furthermore, when the load on blades exceeds their structural strength limits, they can twist, deform, or even break, posing a significant safety hazard. These issues severely limit the efficiency of wind turbines and can lead to long-term equipment downtime due to blade damage, significantly increasing repair and replacement costs.

[0004] To this end, technicians are currently considering replacing the rigid structure of wind turbine blades with deformable elastic materials. This would alter the aerodynamic shape of the blades through the deformation of the elastic material, thereby reducing load. However, in windswept areas like the Gobi Desert, the constant impact of sand particles can damage the elastic material. If this damage is not detected in time, it will affect the load-reducing effect and cause the wind turbine blades to be damaged due to prolonged overload. Summary of the Invention

[0005] The main purpose of the present invention is to propose a wind power system, which aims to solve the technical problem that the elastic material on the wind turbine blade used to achieve load reduction cannot be discovered in time after being damaged by the impact of sand and dust, thereby affecting the load reduction effect and causing overload damage to the wind turbine blade.

[0006] To achieve the above objectives, the wind power system proposed in the present invention includes:

[0007] A wind turbine blade, wherein the wind turbine blade has a suction surface and a pressure surface arranged opposite to each other in a thickness direction, and the wind turbine blade has a leading edge and a trailing edge arranged opposite to each other in a width direction; a concave portion is provided on a side of the pressure surface close to the trailing edge;

[0008] an elastic airbag, the elastic airbag comprising a first bladder body and a second bladder body, the first bladder body being attached to the surface of the recessed portion, the second bladder body being located on a side of the first bladder body facing away from the recessed portion, the first bladder body and the second bladder body enclosing an inflatable chamber;

[0009] an air supply device for supplying air to the inflation chamber to inflate the elastic airbag, thereby driving the second bladder away from the first bladder;

[0010] An image acquisition device, configured to acquire a measured image of the elastic airbag in an expanded state at a preset angle;

[0011] An image analysis module pre-stores a standard image of the elastic airbag in an inflated state at a preset angle; the image analysis module is used to superimpose the measured image and the standard image on the same display surface, and when the coverage area of ​​the measured image on the display surface is larger than the coverage area of ​​the standard image on the display surface, the image analysis module is used to output a damage warning signal.

[0012] In one embodiment, the wind power system further includes a negative pressure device, which is connected to the inflation chamber; the negative pressure device is used to perform a negative pressure suction operation on the inflation chamber to shrink the elastic airbag, thereby driving the second bag body to approach the first bag body.

[0013] In one embodiment, the suction surface and / or the pressure surface is provided with a plurality of dust removal holes arranged in an array, and the dust removal holes are connected to the air supply device; the air supply device is used to supply air to the dust removal holes so that the air flow ejected outward through the dust removal holes blows away the dust on the surface of the wind turbine blade.

[0014] In one embodiment, the dust removal air holes include a plurality of first air holes and a plurality of second air holes, and the plurality of first air holes and the plurality of second air holes are arranged to be interspersed with each other on the suction surface; the air outlet direction of the first air holes forms a first angle with the suction surface, and the first angle is 5°~10°, and the air outlet direction of the first air holes is set backward; the air outlet direction of the second air holes is perpendicular to the suction surface; when the air supply device supplies air to the first air holes, the gas flow rate of the suction surface increases, thereby increasing the lift of the wind turbine blade; when the air supply device supplies air to the second air holes, the gas flow rate of the suction surface decreases, thereby reducing the lift of the wind turbine blade.

[0015] In one embodiment, the wind power system further includes a heating component, which is arranged in the air path between the air supply device and the dust removal air hole; the heating component is used to increase the temperature of the air flow ejected outward from the dust removal air hole through a heating operation to melt the ice layer on the surface of the wind power blade.

[0016] In one embodiment, the wind power system further includes a water storage container, and the water storage container and the negative pressure device are in communication with the first air hole and the second air hole;

[0017] In the case where the air supply device supplies air to the first air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the second air hole, so as to suck the water formed by the melting of the ice layer on the suction surface into the water storage container through the second air hole;

[0018] In the case where the air supply device supplies air to the second air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the first air hole, so as to suck the water body formed after the ice layer on the suction surface melts into the water storage container through the first air hole.

[0019] In one embodiment, the suction surface is provided with a plurality of concave cavity structures, and the cross-sectional area of ​​the concave cavity structures gradually decreases from the outside to the inside; the plurality of first air holes and the plurality of second air holes are arranged in a one-to-one correspondence within the coverage area of ​​the concave cavity structures.

[0020] In one embodiment, the leading edge is provided with a diverter air passage, the diverter air passage extending from front to rear, the rear end of the diverter air passage being connected to the air storage bin of the air supply device and / or extending to the trailing edge;

[0021] The wind power system also includes a cover, a filter and a spray device. The cover is arranged at the front edge and covers the diverter air duct. The filter is arranged in the diverter air duct. The spray device is connected to the water storage container. When the cover is opened, the airflow at the front edge enters the diverter air duct. The spray device is used to use the water stored in the water storage container to spray the filter and / or the wind power blades.

[0022] The present invention further provides a wind turbine blade detection method, which is implemented using the aforementioned wind turbine system. The wind turbine blade detection method comprises the following steps:

[0023] supplying air to the inflation chamber through the air supply device to inflate the elastic airbag;

[0024] Acquiring a measured image of the elastic airbag in an expanded state at a preset angle through the image acquisition device;

[0025] Overlaying the measured image and the standard image pre-stored in the image analysis module on the same display surface, so that the centroid of the measured image overlaps with the centroid of the standard image;

[0026] When the coverage area of ​​the measured image on the display surface is larger than the coverage area of ​​the standard image on the display surface, a damage prompt signal is output.

[0027] In one embodiment, after the step of outputting the damage prompt signal, the method further includes:

[0028] On the display surface, a portion of the measured image contour exceeding the standard image contour is defined as an abnormal region; the abnormal region is enclosed by a first contour line of the standard image and a second contour line of the measured image;

[0029] Selecting a plurality of first target points at intervals on the first contour line, and drawing a target normal line of the first contour line through each of the first target points;

[0030] Taking the point where the target normal line intersects the second contour line as the second target point, obtaining the straight-line distance between the first target point and the second target point on each target normal line, and comparing the plurality of straight-line distances;

[0031] The second target point corresponding to the largest straight-line distance is taken as the damaged point, and the coordinate value of the damaged point is output.

[0032] In one embodiment, the wind power system further comprises a negative pressure device, wherein the negative pressure device is in communication with the inflation chamber;

[0033] The wind turbine blade detection method further includes:

[0034] The air supply device alternately supplies air to the inflation chamber, and the negative pressure device performs a negative pressure suction operation on the inflation chamber, so as to drive the elastic airbag to continuously switch between the expansion state and the contraction state to form vibration, thereby causing the sand and dust on the surface of the wind turbine blade to fall off through vibration.

[0035] The wind power system provided by the present invention changes the aerodynamic shape of the wind turbine blades through an inflatable elastic airbag to achieve a load reduction effect. At the same time, a measured image of the elastic airbag in an inflated state at a preset angle is obtained through an image acquisition device, and the measured image is compared with the pre-stored standard image in area through an image analysis module. When the area occupied by the measured image on the display surface is larger than the area occupied by the standard image, it can be determined that the surface of the elastic airbag is worn and has caused local thinning. At this time, a damage prompt signal can be output to inform the operator to intervene in time to avoid further deterioration of the wear and tear, which may damage the aerodynamic shape and affect operations such as blade load reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0037] Figure 1 This is a schematic structural diagram of the elastic airbag in the wind power system provided by the present invention when it is in a contracted state;

[0038] Figure 2 This is a schematic structural diagram of the elastic airbag in the wind power system provided by the present invention when it is in an expanded state;

[0039] Figure 3 A schematic diagram of a measured image and a standard image in a wind power system provided by the present invention;

[0040] Figure 4 A schematic diagram of a wind power system provided by the present invention with a measured image and a standard image superimposed on a display surface;

[0041] Figure 5 A schematic diagram of the flow of the wind turbine blade detection method provided by the present invention;

[0042] Figure 6 This is a schematic diagram of positioning the damage point in the wind turbine blade detection method provided by the present invention.

[0043] Description of Figure Numbers:

[0044] 100, display surface; 200, measured image; 210, second contour line; 300, standard image; 310, first contour line; 400, abnormal area;

[0045] 1. Wind turbine blade; 101. Suction surface; 102. Pressure surface; 103. Leading edge; 104. Trailing edge; 105. Dust removal holes; 1021. Recessed portion; 1031. Diverter air channel; 1051. First air hole; 1052. Second air hole;

[0046] 2. Elastic airbag; 201. First airbag body; 202. Second airbag body; 203. Inflatable chamber;

[0047] 3. Air supply device; 4. Negative pressure device; 5. Heating component; 6. Water storage container; 7. Cover; 8. Filter; 9. Spray device.

[0048] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0051] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] In the field of wind power generation, wind turbine blades, as core components of wind turbines, have a crucial impact on power generation efficiency and equipment lifespan. Large-scale wind turbines are increasingly being deployed in harsh environments such as the Gobi Desert. While these regions are rich in wind energy resources, they often experience extreme wind speeds, posing a significant challenge to the proper operation of wind turbine blades.

[0053] In extreme wind conditions, the load on wind turbine blades increases significantly, potentially causing them to rotate too quickly. Furthermore, when the load on blades exceeds their structural strength limits, they can twist, deform, or even break, posing a significant safety hazard. These issues severely limit the efficiency of wind turbines and can lead to long-term equipment downtime due to blade damage, significantly increasing repair and replacement costs.

[0054] To this end, technicians are currently considering replacing the rigid structure of wind turbine blades with deformable elastic materials. This would alter the aerodynamic shape of the blades through the deformation of the elastic material, thereby reducing load. However, in windswept areas like the Gobi Desert, the constant impact of sand particles can damage the elastic material. If this damage is not detected in time, it will affect the load-reducing effect and cause the wind turbine blades to be damaged due to prolonged overload.

[0055] In order to solve the above problems, the present invention provides a wind power system, which changes the aerodynamic shape of the wind turbine blades through inflatable elastic airbags to achieve the load reduction effect. At the same time, with the help of image analysis technology, the image of the elastic airbag in the inflated state is compared with the standard image in real time, so that the damage of the elastic airbag can be discovered in time and the operator is informed to intervene and deal with it, thereby ensuring the reliability of the load reduction mode through the elastic airbag.

[0056] See also Figures 1 to 4 The wind power system provided by the present invention includes:

[0057] The wind turbine blade 1 has a suction surface 101 and a pressure surface 102 disposed opposite to each other in the thickness direction, and a leading edge 103 and a trailing edge 104 disposed opposite to each other in the width direction; a recessed portion 1021 is provided on a side of the pressure surface 102 close to the trailing edge 104;

[0058] The elastic airbag 2 includes a first bladder 201 and a second bladder 202. The first bladder 201 is attached to the surface of the recessed portion 1021, and the second bladder 202 is located on the side of the first bladder 201 facing away from the recessed portion 1021. The first bladder 201 and the second bladder 202 enclose an inflatable chamber 203.

[0059] The air supply device 3 is used to supply air to the inflation chamber 203 to inflate the elastic airbag 2, thereby driving the second bladder 202 away from the first bladder 201;

[0060] An image acquisition device (not shown in the figure) is used to obtain a measured image 200 of the elastic airbag 2 in an inflated state at a preset angle;

[0061] An image analysis module (not shown) pre-stores a standard image 300 of the elastic airbag 2 in an inflated state at a preset angle; the image analysis module is used to superimpose the measured image 200 and the standard image 300 on the same display surface 100. When the coverage area of ​​the measured image 200 on the display surface 100 is larger than the coverage area of ​​the standard image 300 on the display surface 100, the image analysis module is used to output a damage warning signal.

[0062] In this embodiment, both the suction surface 101 and the pressure surface 102 are curved surfaces. One side of the suction surface 101 and one side of the pressure surface 102 are connected at a leading edge 103, and the other side of the suction surface 101 and the other side of the pressure surface 102 are connected at a trailing edge 104. The wind turbine blade 1 is a structural component with uneven thickness; from the leading edge 103 to the trailing edge 104, the thickness of the wind turbine blade 1 continuously changes as the suction surface 101 and the pressure surface 102 extend along the curved path.

[0063] When the wind blows along the width direction of the wind turbine blade 1, the airflow is diverted at the leading edge 103. Based on the aerodynamic shape design of the wind turbine blade 1, the airflow velocity on the suction surface 101 is faster, while the airflow velocity on the pressure surface 102 is slower. According to Bernoulli's principle, the air pressure at the suction surface 101 is less than the air pressure at the pressure surface 102 at this time. This pressure difference can provide lift for the wind turbine blade 1. The direction of the lift is from the high-pressure area (pressure surface 102) to the low-pressure area (suction surface 101), so that the wind turbine blade 1 can rotate under the action of this lift, thereby completing power generation.

[0064] The air supply device 3 may include an air storage tank and an air pump, which pumps the air from the air storage tank outward. The air supply device 3 may be housed within the wind turbine blade 1 and connected to the inflation chamber 203 of the elastic airbag 2 via a valve structure. By controlling the opening and closing of the valve structure, the air supply device 3 can supply air to the inflation chamber 203 according to actual usage requirements.

[0065] When the wind turbine system is operating normally, the elastic airbag 2 is in a fully contracted state, and the first and second airbags 201 and 202 are tightly fitted to the pressure surface 102 . At this time, the first and second airbags 201 and 202 do not affect the aerodynamic shape of the wind turbine blade 1 itself. When facing extreme wind conditions with extremely high wind speeds, air can be supplied to the inflation chamber 203 through the air supply device 3, so that the elastic airbag 2 is inflated and the second bag 202 is driven away from the first bag 201. At this time, the second bag 202 will change the contour of the pressure surface 102, thereby accelerating the airflow velocity on the pressure surface 102; based on the Bernoulli principle, when the airflow velocity on the suction surface 101 remains unchanged, the air pressure difference between the suction surface 101 and the pressure surface 102 is reduced, thereby reducing the lift and rotation speed that the wind turbine blade 1 needs to withstand. In this way, the load of the wind turbine blade 1 can be quickly reduced under extreme wind conditions, avoiding overload operation of the wind turbine blade 1 at a higher wind speed and causing structural damage, which is beneficial to improving the operating safety and environmental adaptability of the wind turbine blade 1 and extending the service life of the wind turbine blade 1.

[0066] The elastic airbag 2 can be made of a wear-resistant elastic material to reduce the probability of damage to the elastic airbag 2 from the impact of sand and dust particles. Once the surface of the elastic airbag 2 is worn by the impact of sand and dust particles, the thickness of the worn area will become thinner. Therefore, when the elastic airbag 2 is inflated, under the same air pressure conditions, the tension generated by the gas will more easily expand the weak worn area, resulting in an increase in the expanded volume of the elastic airbag 2 at the worn area.

[0067] Based on the above considerations, the present embodiment corresponds to the arrangement of an image acquisition device and an image analysis module. The image acquisition device may be a camera, etc., and the image analysis module may be integrated into a main control module such as the MCU (Microcontroller Unit) of the wind power system, and the image analysis module is electrically connected to the image acquisition device. When the elastic airbag 2 is in an inflated state, the image acquisition device is used to acquire measured images 200 of the elastic airbag 2 at several preset angles in real time, and send the several measured images 200 to the image analysis module; the image analysis module is used to compare the several measured images 200 with the several pre-stored standard images 300 one by one in real time. Specifically, if Figure 3 and Figure 4 As shown, the image analysis module superimposes the measured image 200 and the standard image 300 on the same display surface 100, which can refer to an image analysis interface or an operation interface. Under normal circumstances, the measured image 200 should be able to overlap with the standard image 300. However, when a part of the elastic airbag 2 is impacted by sand and dust and is worn, the thickness of the area becomes thinner, causing the expansion volume of the elastic airbag 2 in this area to increase. At this time, the outline of the measured image 200 will protrude outward from the standard image 300 at a position corresponding to the worn area. Due to the existence of the protruding portion, the coverage area of ​​the measured image 200 on the display surface 100 is larger than the coverage area of ​​the standard image 300 on the display surface 100. When the elastic airbag 2 is determined to be worn according to the above-mentioned area comparison method, the image analysis module can send a corresponding signal to the main control module to trigger the main control module to control the prompt device to output a damage prompt signal, so as to promptly notify the operator to perform repairs, replacements, etc., to avoid further deterioration of the wear and tear, which may damage the aerodynamic shape and affect operations such as blade load reduction.

[0068] Among them, the prompt device can be an alarm light, a buzzer, a display, etc., and the damage prompt signal can be an audio-visual signal, an image signal, a voice signal, a text signal, etc., which is not limited here.

[0069] Preferably, the image analysis module can set a critical area threshold, and use the partial area where the outline of the measured image 200 exceeds the outline of the standard image 300 as the abnormal area 400. When the image analysis module determines that the area of ​​the abnormal area 400 reaches the critical area threshold, the image analysis module triggers the prompt device through the main control module to output a damage prompt signal. In this way, it can avoid the misjudgment caused by the floating of the normal area of ​​the elastic airbag 2 to a certain extent.

[0070] It can be seen that this embodiment changes the aerodynamic shape of the wind turbine blade 1 through the inflatable elastic airbag 2 to achieve the load reduction effect. At the same time, the image acquisition device obtains the measured image 200 of the elastic airbag 2 in the inflated state at a preset angle, and the image analysis module compares the measured image 200 with the pre-stored standard image 300 in area. When the area occupied by the measured image 200 on the display surface 100 is larger than the standard image 300, it can be determined that the surface of the elastic airbag 2 is worn and locally thinned. At this time, a damage prompt signal can be output to inform the operator to intervene in time to avoid further deterioration of the wear and tear, which may damage the aerodynamic shape and affect operations such as blade load reduction.

[0071] In one embodiment, reference Figure 1 and Figure 2 The wind power system also includes a negative pressure device 4, which is connected to the inflation chamber 203; the negative pressure device 4 is used to perform a negative pressure suction operation on the inflation chamber 203 to shrink the elastic airbag 2, thereby driving the second capsule 202 close to the first capsule 201.

[0072] Specifically, the negative pressure device 4 can be an air pump with a negative pressure suction function. The negative pressure device 4 performs a negative pressure suction operation on the elastic airbag 2, and the elastic airbag 2 in the expanded state can be restored to the initial contracted state after the load reduction operation is completed.

[0073] Furthermore, when wind power systems are used in windy and sandy areas with harsh environments, such as the Gobi Desert, the air contains high levels of dust and sand. Dust particles constantly impact and adhere to the surface of wind turbine blades 1, causing dust to easily accumulate on the surface of wind turbine blades 1. Dust accumulation significantly affects the aerodynamic performance of wind turbine blades 1, altering their aerodynamic shape and increasing surface roughness, thereby reducing the power generation efficiency of wind turbines. Currently, to ensure the normal operation of wind turbines, manual regular dust removal is commonly used. However, this method has many drawbacks. First, manual dust removal is inconvenient to operate, requiring professionals to carry equipment and climb to wind turbine blades 1 for cleaning, which poses a high safety risk and is accompanied by high labor costs. Second, manual dust removal usually requires downtime, during which the wind turbine cannot generate electricity, directly affecting the wind farm's power generation revenue and reducing the economic efficiency of wind power generation.

[0074] Based on the above problem, in this embodiment, when the surface of the wind turbine blade 1 is covered with sand and dust, air can be first supplied to the inflation chamber 203 through the air supply device 3 to inflate the elastic airbag 2; then the inflation chamber 203 is subjected to a negative pressure suction operation through the negative pressure device 4 to shrink the elastic airbag 2; and then air is supplied to the inflation chamber 203 through the air supply device 3 to re-inflate the elastic airbag 2, and this cycle is repeated; by rapidly alternating the above-mentioned air supply operation and negative pressure suction operation, the elastic airbag 2 can be alternately expanded and contracted in a short period of time to generate vibration, and the vibration energy is transmitted to the wind turbine blade 1, so that the sand and dust covering the surface of the wind turbine blade 1 can be separated from the wind turbine blade 1 under the action of inertia, thereby achieving automatic removal of sand and dust without stopping the machine and without manual dust removal.

[0075] In one embodiment, reference Figure 1 and Figure 2 The suction surface 101 and / or the pressure surface 102 are provided with a plurality of dust removal holes 105 arranged in an array, and the dust removal holes 105 are connected to the air supply device 3; the air supply device 3 is used to supply air to the dust removal holes 105, so that the air flow ejected outward through the dust removal holes 105 blows away the dust on the surface of the wind turbine blade 1.

[0076] The dust removal holes 105 can be configured as microporous structures. The air supply device 3 can be connected to the dust removal holes 105 and the inflation chamber 203 of the elastic airbag 2 through corresponding valve structures. By controlling the opening and closing of the valve structures, the air supply device 3 can supply air to the dust removal holes 105 and the inflation chamber 203 according to actual usage requirements.

[0077] When the surface of the wind turbine blade 1 is covered with sand and dust, the air supply device 3 and the negative pressure device 4 alternately perform air supply operations and negative pressure suction operations on the elastic airbag 2, which can make the elastic airbag 2 alternately expand and contract in a short period of time to generate vibration. The vibration energy is transmitted to the wind turbine blade 1, which can make the sand and dust covering the surface of the wind turbine blade 1 separate from the wind turbine blade 1 under the action of inertia; at the same time, the air supply device 3 supplies air to the dust removal air hole 105, and the airflow ejected outward from the dust removal air hole 105 can blow the detached sand and dust off the surface of the wind turbine blade 1.

[0078] It can be seen that through the coordinated cooperation between the expansion and contraction action of the elastic airbag 2 and the jet operation of the dust removal air hole 105, the dust on the surface of the wind turbine blade 1 can be automatically and efficiently removed without stopping the machine. The dust removal effect is more thorough, thereby eliminating the need for manual dust removal operations and reducing the large amount of manpower and material costs consumed by frequent dust removal operations.

[0079] In one embodiment, reference Figure 1 and Figure 2The dust removal air holes 105 include a plurality of first air holes 1051 and a plurality of second air holes 1052, and the plurality of first air holes 1051 and the plurality of second air holes 1052 are arranged to be spaced apart from each other on the suction surface 101; the air outlet direction of the first air holes 1051 forms a first angle with the suction surface 101, and the first angle is 5° to 10°, and the air outlet direction of the first air holes 1051 is set backward; the air outlet direction of the second air holes 1052 is perpendicular to the suction surface 101; when the air supply device 3 supplies air to the first air holes 1051, the gas flow rate of the suction surface 101 increases, thereby increasing the lift of the wind turbine blade 1; when the air supply device 3 supplies air to the second air holes 1052, the gas flow rate of the suction surface 101 decreases, thereby reducing the lift of the wind turbine blade 1.

[0080] The first air hole 1051 can be set as a microporous structure; the air outlet direction of the first air hole 1051 forms a first angle with the suction surface 101, which means that the axis of the first air hole 1051 and the cross-section of the suction surface 101 at the first air hole 1051 form a first angle; the first angle is set to 5°~10°, and the air outlet direction of the first air hole 1051 is set backward, so that the airflow direction ejected outward from the first air hole 1051 and the flow direction of the external airflow on the surface of the suction surface 101 are close to being parallel to each other, that is, the airflow ejected outward from the first air hole 1051 can form a boosting effect on the external airflow flowing on the surface of the suction surface 101, so that the airflow velocity on the surface of the suction surface 101 can be accelerated, thereby reducing the air pressure at the suction surface 101.

[0081] The second air hole 1052 can be set as a microporous structure; the air outlet direction of the second air hole 1052 is perpendicular to the suction surface 101, which means that the axis of the second air hole 1052 is perpendicular to the cross-section of the suction surface 101 at the second air hole 1052 (or the axis of the second air hole 1052 and the normal of the suction surface 101 at the second air hole 1052 are parallel to each other); in this way, the direction of the airflow ejected outward from the second air hole 1052 and the flow direction of the external airflow on the surface of the suction surface 101 are close to being perpendicular to each other, that is, the airflow ejected outward from the second air hole 1052 can form an obstruction to the external airflow flowing on the surface of the suction surface 101, so as to slow down the airflow velocity on the surface of the suction surface 101, thereby increasing the air pressure at the suction surface 101.

[0082] The air supply device 3 can be connected to the first air hole 1051 and the second air hole 1052 through the corresponding valve structure; by controlling the opening and closing of the valve structure, the air supply device 3 can supply air to the first air hole 1051 and / or the second air hole 1052 according to actual use requirements.

[0083] Based on the above settings, when the wind power equipment is operating normally, if it is necessary to remove the sand and dust on the surface of the wind turbine blade 1, air can be supplied to the first air hole 1051 through the air supply device 3, so that while the airflow ejected outward from the first air hole 1051 is used to blow away the sand and dust, the air pressure at the suction surface 101 is reduced by increasing the air flow velocity of the suction surface 101, thereby increasing the air pressure difference between the suction surface 101 and the pressure surface 102, and increasing the lift of the wind turbine blade 1, so that the rotation speed of the wind turbine blade 1 can be increased when the external wind conditions remain unchanged, thereby improving the power generation efficiency. In the case where it is necessary to reduce the load of the wind turbine blade 1, if it is necessary to remove the dust on the surface of the wind turbine blade 1, air can be supplied to the second air hole 1052 through the air supply device 3, so that while the airflow ejected outward from the second air hole 1052 is used to blow away the dust, the air pressure at the suction surface 101 is increased by reducing the air flow velocity of the suction surface 101, thereby reducing the air pressure difference between the suction surface 101 and the pressure surface 102, reducing the lift of the wind turbine blade 1, and thus achieving the load reduction of the wind turbine blade 1.

[0084] In one embodiment, reference Figure 1 and Figure 2 The wind power system also includes a heating component 5, which is arranged on the air path between the air supply device 3 and the dust removal air hole 105; the heating component 5 is used to increase the temperature of the air flow ejected outward from the dust removal air hole 105 through heating operation to melt the ice layer on the surface of the wind turbine blade 1.

[0085] In environments with large temperature differences, such as those in the Gobi Desert and on the plateau, especially when exposed to cold air, frost or ice easily forms on the surface of wind turbine blades 1. This can damage the aerodynamic shape of wind turbine blades 1, reduce power generation efficiency, and easily cause vibration and uneven load on wind turbine blades 1, affecting equipment safety. To address this issue, this embodiment provides a heating assembly 5. When the air supply device 3 supplies air to the dust removal holes 105, if frost or ice forms on the surface of wind turbine blades 1, heating assembly 5 can be activated. The gas will be heated as it passes through heating assembly 5, and the dust removal holes 105 will eject a high-temperature hot air flow, which can melt the ice layer on the blade surface. The heating assembly 5 can be electrically heated and housed within the wind turbine blade 1.

[0086] Based on the above arrangement, the function of the dust removal holes 105 can be further expanded so that the dust removal holes 105 can not only remove sand and dust and achieve the load reduction effect but also realize ice melting operation.

[0087] In one embodiment, reference Figure 1 and Figure 2 The wind power system further includes a water storage container 6, the water storage container 6, the negative pressure device 4, and the first air hole 1051 and the second air hole 1052 are in communication;

[0088] When the air supply device 3 supplies air to the first air hole 1051 and the heating assembly 5 performs a heating operation, the negative pressure device 4 is used to perform a negative pressure suction operation on the second air hole 1052, so as to suck the water formed by the melting of the ice layer on the suction surface 101 into the water storage container 6 through the second air hole 1052;

[0089] When the air supply device 3 supplies air to the second air hole 1052, when the heating component 5 performs a heating operation, the negative pressure device 4 is used to perform a negative pressure suction operation on the first air hole 1051, so as to suck the water body formed after the ice layer on the suction surface 101 melts into the water storage container 6 through the first air hole 1051.

[0090] Specifically, the water storage container 6 can be stored inside the wind turbine blade 1 , and the water storage container 6 can be arranged in the middle of the connecting air path between the negative pressure device 4 and the first air hole 1051 and the second air hole 1052 .

[0091] When ice melting operation is required, the heating component 5 can be turned on, and air can be supplied to the first air hole 1051 or the second air hole 1052 through the air supply device 3 to melt the ice layer on the suction surface 101; when the air supply device 3 supplies air to the first air hole 1051, the negative pressure device 4 can perform a negative pressure suction operation on the second air hole 1052, so that the water after the ice layer melts enters the second air hole 1052 under the action of negative pressure, and this part of the water will be collected by the water storage container 6 when flowing through the air path between the second air hole 1052 and the negative pressure device 4; similarly, when the air supply device 3 supplies air to the second air hole 1052, the negative pressure device 4 can perform a negative pressure suction operation on the first air hole 1051, so that the water after the ice layer melts enters the first air hole 1051 under the action of negative pressure, and this part of the water will be collected by the water storage container 6 when flowing through the air path between the first air hole 1051 and the negative pressure device 4. In this way, the recovery of the water body after the ice melt is completed, and the water body stored in the water storage container 6 can be used for cleaning, heat dissipation, cooling and other operations later.

[0092] Based on the solution of this embodiment, the water body after the ice layer melts can be recycled and reused. On the one hand, it can avoid water accumulation on the surface of the wind turbine blade 1 and affect its normal operation. On the other hand, it can maximize the utilization of water resources in a harsh environment of water shortage.

[0093] In one embodiment, reference Figure 1 and Figure 2 The suction surface 101 is provided with a plurality of concave cavity structures (not shown in the figure), and the cross-sectional area of ​​the concave cavity structure gradually decreases from the outside to the inside; a plurality of first air holes 1051 and a plurality of second air holes 1052 are arranged in a one-to-one correspondence within the coverage area of ​​the concave cavity structure.

[0094] Specifically, the concave cavity structure is funnel-shaped. When hot air is sprayed toward the ice layer through the first and second air holes 1051, 1052, the hot air can diffuse radially outward along the sidewalls of the concave cavity structure, thereby increasing the contact area between the hot air and the ice layer and improving ice melting efficiency. When the ice layer within the concave cavity structure is completely melted, the unmelted outer ice layer opposite the concave cavity structure is left in an suspended state. This facilitates the expansion of the elastic airbag 2, allowing this suspended ice layer to separate from the surface of the wind turbine blade 1 under tension. Furthermore, during the above-mentioned ice melting process, water from the melted ice layer can also be received by the concave cavity structure and gathered in the first and second air holes 1051, 1052, and collected in the water storage container 6 under negative pressure suction, thereby improving the water recovery rate.

[0095] In one embodiment, reference Figure 1 and Figure 2 The leading edge 103 is provided with a diverter air passage 1031, which extends from front to rear. The rear end of the diverter air passage 1031 is connected to the air storage bin of the air supply device 3 and / or passes through to the trailing edge 104;

[0096] The wind power system also includes a cover body 7, a filter screen 8 and a spray device 9. The cover body 7 is arranged on the leading edge 103 and covers the diverter air duct 1031. The filter screen 8 is arranged in the diverter air duct 1031. The spray device 9 is connected to the water storage container 6. When the cover body 7 is opened, the airflow at the leading edge 103 enters the diverter air duct 1031. The spray device 9 is used to use the water stored in the water storage container 6 to spray the filter screen 8 and / or the wind power blade 1.

[0097] In this embodiment, a diverter air channel 1031 is provided at the leading edge 103 of the wind turbine blade 1. The diverter air channel 1031 extends backward along the width direction of the wind turbine blade 1. When the airflow reaches the leading edge 103 of the wind turbine blade 1, before the airflow is diverted by the leading edge 103 to the suction surface 101 and the pressure surface 102, a portion of the airflow will first enter the diverter air channel 1031 and flow backward. The portion of the airflow that finally enters the diverter air channel 1031 will be collected in the air storage bin of the air supply device 3 to replenish the air supply device 3, or directly flow outward from the trailing edge 104. This reduces the total airflow diverted to the suction surface 101 and the pressure surface 102, and can quickly reduce the lift of the wind turbine blade 1 and achieve rapid load reduction. This solution can work together with the load reduction operation of the second air hole 1052 and the elastic airbag 2, thereby further improving the load reduction effect of the wind turbine blade 1.

[0098] Leading edge 103 is provided with a cover 7. Under normal wind conditions, cover 7 covers the diverter air passage 1031, preventing airflow from entering diverter air passage 1031 and reducing power generation efficiency. In extreme wind conditions, cover 7 can be opened to reduce the load on wind turbine blade 1. Diverter air passage 1031 is provided with a filter 8 to remove impurities such as sand and dust from the airflow entering diverter air passage 1031, preventing impurities from entering the interior of wind turbine blade 1 and causing interference or damage to other components.

[0099] The spray device 9 can be stored inside the wind turbine blade 1. The spray device 9 can use the water stored in the water storage container 6 during the ice melting operation to regularly spray the filter 8 to remove impurities attached to the filter 8 and avoid blockage of the diversion air channel 1031; the spray end of the spray device 9 can also be extended to the outside of the wind turbine blade 1 through the corresponding water channel to regularly spray the outer surface of the wind turbine blade 1, so as to cooperate with the dust removal air holes 105 to achieve the cleaning of the surface of the wind turbine blade 1 and avoid impurities blocking the dust removal air holes 105.

[0100] The present invention also provides a wind turbine blade detection method, see Figures 1 to 5 The wind turbine blade detection method is implemented using the aforementioned wind turbine system; the wind turbine blade detection method includes the following steps:

[0101] Supply air to the inflation chamber 203 through the air supply device 3 to inflate the elastic airbag 2;

[0102] Acquire a measured image 200 of the elastic airbag 2 in an expanded state at a preset angle through an image acquisition device;

[0103] Overlay the measured image 200 and the standard image 300 pre-stored in the image analysis module on the same display surface 100 so that the centroid of the measured image 200 overlaps with the centroid of the standard image 300;

[0104] When the coverage area of ​​the measured image 200 on the display surface 100 is larger than the coverage area of ​​the standard image 300 on the display surface 100 , a damage prompt signal is output.

[0105] In this embodiment, when the wind power system is operating normally, the elastic airbag 2 is in a fully contracted state, and the first bag 201 and the second bag 202 are tightly fitted with the pressure surface 102. At this time, the first bag 201 and the second bag 202 do not affect the aerodynamic shape of the wind turbine blade 1 itself. When facing extreme wind conditions with extremely high wind speeds, air can be supplied to the inflation chamber 203 through the air supply device 3, so that the elastic airbag 2 is inflated and the second bag 202 is driven away from the first bag 201. At this time, the second bag 202 will change the contour of the pressure surface 102, thereby accelerating the airflow velocity on the pressure surface 102; based on the Bernoulli principle, when the airflow velocity on the suction surface 101 remains unchanged, the air pressure difference between the suction surface 101 and the pressure surface 102 is reduced, thereby reducing the lift and rotation speed that the wind turbine blade 1 needs to withstand. In this way, the load of the wind turbine blade 1 can be quickly reduced under extreme wind conditions, avoiding overload operation of the wind turbine blade 1 at a higher wind speed and causing structural damage, which is beneficial to improving the operating safety and environmental adaptability of the wind turbine blade 1 and extending the service life of the wind turbine blade 1.

[0106] The elastic airbag 2 can be made of a wear-resistant elastic material to reduce the probability of damage to the elastic airbag 2 from the impact of sand and dust particles. Once the surface of the elastic airbag 2 is worn by the impact of sand and dust particles, the thickness of the worn area will become thinner. Therefore, when the elastic airbag 2 is inflated, under the same air pressure conditions, the tension generated by the gas will more easily expand the weak worn area, resulting in an increase in the expanded volume of the elastic airbag 2 at the worn area.

[0107] Based on the above considerations, the present embodiment corresponds to the arrangement of an image acquisition device and an image analysis module. The image acquisition device may be a camera, etc., and the image analysis module may be integrated into a main control module such as the MCU (Microcontroller Unit) of the wind power system, and the image analysis module is electrically connected to the image acquisition device. When the elastic airbag 2 is in an inflated state, the image acquisition device is used to acquire measured images 200 of the elastic airbag 2 at several preset angles in real time, and send the several measured images 200 to the image analysis module; the image analysis module is used to compare the several measured images 200 with the several pre-stored standard images 300 one by one in real time. Specifically, if Figure 3 and Figure 4As shown, the image analysis module superimposes the measured image 200 and the standard image 300 on the same display surface 100, which can refer to an image analysis interface or an operation interface. Under normal circumstances, the measured image 200 should be able to overlap with the standard image 300. However, when a part of the elastic airbag 2 is impacted by sand and dust and is worn, the thickness of the area becomes thinner, causing the expansion volume of the elastic airbag 2 in this area to increase. At this time, the outline of the measured image 200 will protrude outward from the standard image 300 at a position corresponding to the worn area. Due to the existence of the protruding portion, the coverage area of ​​the measured image 200 on the display surface 100 is larger than the coverage area of ​​the standard image 300 on the display surface 100. When the elastic airbag 2 is determined to be worn according to the above-mentioned area comparison method, the image analysis module can send a corresponding signal to the main control module to trigger the main control module to control the prompt device to output a damage prompt signal, so as to promptly notify the operator to perform repairs, replacements, etc., to avoid further deterioration of the wear and tear, which may damage the aerodynamic shape and affect operations such as blade load reduction.

[0108] Among them, the prompt device can be an alarm light, a buzzer, a display, etc., and the damage prompt signal can be an audio-visual signal, an image signal, a voice signal, a text signal, etc., which is not limited here.

[0109] Preferably, the image analysis module can set a critical area threshold, and use the partial area where the outline of the measured image 200 exceeds the outline of the standard image 300 as the abnormal area 400. When the image analysis module determines that the area of ​​the abnormal area 400 reaches the critical area threshold, the image analysis module triggers the prompt device through the main control module to output a damage prompt signal. In this way, it can avoid the misjudgment caused by the floating of the normal area of ​​the elastic airbag 2 to a certain extent.

[0110] For other specific structures of the wind power system, please refer to the description of the above embodiments. Since the wind turbine blade detection method in this embodiment adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, namely, the aerodynamic shape of the wind turbine blade 1 is changed by the inflatable elastic airbag 2 to achieve the load reduction effect. At the same time, the image acquisition device obtains a measured image 200 of the elastic airbag 2 in an inflated state at a preset angle, and the image analysis module compares the measured image 200 with the pre-stored standard image 300 in area. When the area occupied by the measured image 200 on the display surface 100 is larger than the standard image 300, it can be determined that the surface of the elastic airbag 2 has been worn, resulting in local thinning. At this time, a damage warning signal can be output to inform the operator to intervene in time to prevent further deterioration of the wear and tear, which may damage the aerodynamic shape and affect the blade load reduction operation.

[0111] In one embodiment, reference Figure 5 and Figure 6 , after the step of outputting a damage prompt signal, the method includes:

[0112] On the display surface 100 , the portion where the outline of the measured image 200 exceeds the outline of the standard image 300 is defined as an abnormal region 400 ; the abnormal region 400 is enclosed by the first outline 310 of the standard image 300 and the second outline 210 of the measured image 200 ;

[0113] Selecting a plurality of first target points at intervals on the first contour line 310 and drawing a target normal line of the first contour line 310 through each first target point;

[0114] Taking the point where the target normal line intersects the second contour line 210 as the second target point, obtaining the straight-line distance between the first target point and the second target point on each target normal line, and comparing the multiple straight-line distances;

[0115] The second target point corresponding to the maximum straight-line distance is taken as the damaged point, and the coordinate value of the damaged point is output.

[0116] This embodiment provides a solution for accurately locating the wear area of ​​the elastic airbag 2. Figure 6 As shown in the figure, five first target points A1, A2, A3, A4, and A5 are selected on the first contour line 310 of the standard image 300 at intervals, and the target normal of the first contour line 310 is drawn through each first target point to obtain five target normal lines L1, L2, L3, L4, and L5. The intersections of the five target normal lines and the second contour line 210 of the measured image 200 constitute five second target points B1, B2, B3, B4, and B5. Then, the shortest straight-line distance between the first target point and the second target point on each target normal line is compared (i.e., the shortest straight-line distance between A1 and B1, A2 and B3 are compared). The shortest straight-line distance between A3 and B2, the shortest straight-line distance between A3 and B3, the shortest straight-line distance between A4 and B4, and the shortest straight-line distance between A5 and B5); after comparison, it is found that the shortest straight-line distance between A3 and B3 is the largest. At this time, it can be determined that the elastic airbag 2 is thinnest at the second target point B3 and has the largest deformation after expansion. Therefore, it can be determined that the wear position of the elastic airbag 2 is located at the second target point B3; finally, the coordinate value of the second target point B3 (i.e., the damage point) is output to inform the operator of the exact wear position, so that the operator can quickly locate the wear area and perform corresponding repairs. The coordinate value of the damage point can refer to the coordinate value of the damage point relative to the wind turbine blade 1.

[0117] In one embodiment, reference Figure 1 and Figure 2 , the wind power system further includes a negative pressure device 4, which is in communication with the inflation chamber 203;

[0118] The wind turbine blade detection method further includes:

[0119] The air supply device 3 alternately supplies air to the inflation chamber 203 and the negative pressure device 4 performs a negative pressure suction operation on the inflation chamber 203 to drive the elastic airbag 2 to continuously switch between the expansion state and the contraction state to generate vibration, thereby causing the dust on the surface of the wind turbine blade 1 to fall off through vibration.

[0120] In this embodiment, when the surface of the wind turbine blade 1 is covered with sand and dust, air can be first supplied to the inflation chamber 203 through the air supply device 3 to inflate the elastic airbag 2; then the inflation chamber 203 is subjected to a negative pressure suction operation through the negative pressure device 4 to shrink the elastic airbag 2; and then air is supplied to the inflation chamber 203 through the air supply device 3 to re-inflate the elastic airbag 2, and this cycle is repeated; by rapidly alternating the above-mentioned air supply operation and negative pressure suction operation, the elastic airbag 2 can be alternately expanded and contracted in a short period of time to generate vibration, and the vibration energy is transmitted to the wind turbine blade 1, so that the sand and dust covering the surface of the wind turbine blade 1 can be separated from the wind turbine blade 1 under the action of inertia, thereby achieving automatic removal of sand and dust without stopping the machine and without the need for manual dust removal.

[0121] It should be noted that other contents of the wind power system and wind power blade detection method disclosed in the present invention can be found in the prior art and will not be described in detail here.

[0122] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A wind power system, characterized in that: The wind power system comprises: A wind turbine blade, wherein the wind turbine blade has a suction surface and a pressure surface arranged opposite to each other in a thickness direction, and the wind turbine blade has a leading edge and a trailing edge arranged opposite to each other in a width direction; a concave portion is provided on a side of the pressure surface close to the trailing edge; an elastic airbag, the elastic airbag comprising a first bladder body and a second bladder body, the first bladder body being attached to the surface of the recessed portion, the second bladder body being located on a side of the first bladder body facing away from the recessed portion, the first bladder body and the second bladder body enclosing an inflatable chamber; an air supply device for supplying air to the inflation chamber to inflate the elastic airbag, thereby driving the second bladder body away from the first bladder body; An image acquisition device, configured to acquire a measured image of the elastic airbag in an expanded state at a preset angle; An image analysis module pre-stores a standard image of the elastic airbag in an inflated state at a preset angle; the image analysis module is used to superimpose the measured image and the standard image on the same display surface, and when the coverage area of ​​the measured image on the display surface is larger than the coverage area of ​​the standard image on the display surface, the image analysis module is used to output a damage warning signal.

2. The wind power system according to claim 1, wherein: The wind power system also includes a negative pressure device, which is connected to the inflation chamber; the negative pressure device is used to perform a negative pressure suction operation on the inflation chamber to shrink the elastic airbag, thereby driving the second bag body to approach the first bag body.

3. The wind power system according to claim 2, wherein: The suction surface and / or the pressure surface are provided with a plurality of dust removal holes arranged in an array, and the dust removal holes are connected to the air supply device; the air supply device is used to supply air to the dust removal holes so that the air flow ejected outward through the dust removal holes blows away the dust on the surface of the wind turbine blade.

4. The wind power system according to claim 3, wherein: The dust removal air holes include a plurality of first air holes and a plurality of second air holes, and the plurality of first air holes and the plurality of second air holes are arranged to be interspaced with each other on the suction surface; the air outlet direction of the first air holes forms a first angle with the suction surface, the first angle is 5° to 10°, and the air outlet direction of the first air holes is arranged to face backward; the air outlet direction of the second air holes is perpendicular to the suction surface; when the air supply device supplies air to the first air holes, the gas flow rate of the suction surface increases, thereby increasing the lift of the wind turbine blade; when the air supply device supplies air to the second air holes, the gas flow rate of the suction surface decreases, thereby reducing the lift of the wind turbine blade; And / or, the wind power system also includes a heating component, which is arranged on the air path between the air supply device and the dust removal air hole; the heating component is used to increase the temperature of the air flow ejected outward from the dust removal air hole through heating operation to melt the ice layer on the surface of the wind power blade.

5. The wind power system according to claim 4, characterized in that: The wind power system further includes a water storage container, wherein the water storage container and the negative pressure device are in communication with the first air hole and the second air hole; In the case where the air supply device supplies air to the first air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the second air hole, so as to suck the water formed by the melting of the ice layer on the suction surface into the water storage container through the second air hole; In the case where the air supply device supplies air to the second air hole, when the heating component performs a heating operation, the negative pressure device is used to perform a negative pressure suction operation on the first air hole, so as to suck the water body formed after the ice layer on the suction surface melts into the water storage container through the first air hole.

6. The wind power system according to claim 5, characterized in that: The suction surface is provided with a plurality of concave cavity structures, and the cross-sectional area of ​​the concave cavity structures gradually decreases from the outside to the inside; the plurality of first air holes and the plurality of second air holes are arranged in a one-to-one correspondence within the coverage area of ​​the concave cavity structures.

7. The wind power system according to claim 5, characterized in that: The front edge is provided with a diverter air passage, the diverter air passage extends from front to rear, the rear end of the diverter air passage is connected to the air storage bin of the air supply device and / or passes through to the rear edge; The wind power system further includes a cover, a filter, and a spray device. The cover is disposed at the front edge and covers the diverter air passage. The filter is disposed in the diverter air passage. The spray device is connected to the water storage container. When the cover is opened, the airflow at the front edge enters the diverter air passage. The spraying device is used to utilize the water stored in the water storage container to perform a spraying operation on the filter screen and / or the wind turbine blades.

8. A wind turbine blade detection method, characterized in that: The wind turbine blade detection method is implemented by using the wind turbine system according to any one of claims 1 to 7; the wind turbine blade detection method comprises the following steps: supplying air to the inflation chamber through the air supply device to inflate the elastic airbag; Acquiring a measured image of the elastic airbag in an expanded state at a preset angle through the image acquisition device; Overlaying the measured image and the standard image pre-stored in the image analysis module on the same display surface, so that the centroid of the measured image overlaps with the centroid of the standard image; When the coverage area of ​​the measured image on the display surface is larger than the coverage area of ​​the standard image on the display surface, a damage prompt signal is output.

9. The wind turbine blade detection method according to claim 8, characterized in that: After the step of outputting the damage prompt signal, the method further includes: On the display surface, a portion of the measured image contour exceeding the standard image contour is defined as an abnormal region; the abnormal region is enclosed by a first contour line of the standard image and a second contour line of the measured image; Selecting a plurality of first target points at intervals on the first contour line, and drawing a target normal line of the first contour line through each of the first target points; Taking the point where the target normal line intersects the second contour line as the second target point, obtaining the straight-line distance between the first target point and the second target point on each target normal line, and comparing the plurality of straight-line distances; The second target point corresponding to the largest straight-line distance is taken as the damaged point, and the coordinate value of the damaged point is output.

10. The wind turbine blade detection method according to claim 8, characterized in that: The wind power system further includes a negative pressure device, which is in communication with the inflation chamber; The wind turbine blade detection method further includes: The air supply device alternately supplies air to the inflation chamber, and the negative pressure device performs a negative pressure suction operation on the inflation chamber, so as to drive the elastic airbag to continuously switch between the expansion state and the contraction state to form vibration, thereby causing the sand and dust on the surface of the wind turbine blade to fall off through vibration.

Images