CN110274917B - Wind turbine generator blade surface defect taking device and lens layout method - Google Patents
Wind turbine generator blade surface defect taking device and lens layout method Download PDFInfo
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- CN110274917B CN110274917B CN201910523766.0A CN201910523766A CN110274917B CN 110274917 B CN110274917 B CN 110274917B CN 201910523766 A CN201910523766 A CN 201910523766A CN 110274917 B CN110274917 B CN 110274917B
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- 230000007547 defect Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
Abstract
The invention relates to a wind turbine blade surface defect taking device and a lens layout method, and belongs to the field of wind turbine fault diagnosis. The invention comprises a camera group for shooting images, a bracket for arranging the camera group, a positioning camera, an image processing server, a communication cable and an alternating current power supply; the camera group is installed on the support, the positioning camera is installed on the side face of the camera group and is located in the middle of the camera group, the camera group and the positioning camera are connected with the image processing server through the communication cable, and the image processing server is connected with the alternating current power supply. The plurality of eyepieces of the camera group are arranged in an arc line. The length of the communication cable is 100m. The system has the advantages of simple structure, compact structure and strong practicability, is suitable for the wind power industry, has operability, and is a good method proved by practice.
Description
Technical Field
The invention relates to a wind turbine blade surface defect taking device and a lens layout method, and belongs to the field of wind turbine fault diagnosis.
Background
In recent years, the annual growth rate of renewable energy sources reaches 25%, the utilization of renewable energy sources is dominant in the power industry, and the power generation proportion of non-hydraulic renewable energy sources is doubled. It was counted that the consumption of renewable energy in 2030 would exceed 22 million t oil equivalents. Wind power generation is used as a renewable energy source for generating electricity which is the most mature technology except hydroelectric power generation, and the installed capacity of the renewable energy source is the vast majority of the total capacity of the whole renewable energy source power generation installation.
The wind generating set comprises a wind wheel and a generator; the wind wheel comprises blades, a hub, reinforcing members and the like; it has the functions of wind power rotation to generate power, rotation of generator head, etc. The wind power generation power supply consists of a wind power generator set, a tower for supporting the wind power generator set, a storage battery charging controller, an inverter, an unloader, a grid-connected controller, a storage battery pack and the like.
Blades of a wind generating set are exposed in the field throughout the year and are subjected to wind blowing, sun drying, rain and lightning strike, so that various defects are easily generated. The causes of defects in fan blades are various:
1. production defect
1.1 Using unreasonable materials
1.2 relaxed quality control
1.3 the production process is too complex, and it is difficult to produce products with consistent quality.
2. Natural cause
Lightning striking the blade. Mainly comprises the following steps: lightning strikes, particles in the air, high velocity wind, shear wind, bad weather, and fatigue life.
3. Misrun and improper maintenance
3.1 over-rated power operation
3.2 run away
When the variable pitch system of the machine fails, the brake on the machine can not stop the impeller to rotate, the blades are out of control and can continue to rotate rapidly, the blades are seriously thrown out, and a disastrous accident of the fan is caused.
3.3 lack of preventive maintenance
In the routine operation and maintenance of fans, the blades often do not pay attention. However, the aging of the blade changes with time under adverse conditions such as sunlight, acid rain, gust, natural vibration, sand wind, salt fog, etc. The blades are difficult to inspect and maintain in daily maintenance, and natural cracking, sand holes, surface abrasion, lightning strike damage, transverse cracks and the like can occur in many wind farms due to aging. If the problems are in place in daily maintenance, the problems can avoid high maintenance cost in the future and reduce economic loss caused by shutdown.
In view of this, an intelligent detection system for blade surface defects of a wind turbine generator system is disclosed in patent document application No. 201810052136.5. The number of the wind turbine generators is large, potential safety hazards are easily generated by the blades, and the potential safety hazard causes are various, so that great difficulty is brought to automatic identification, classification and positioning of faults of the wind turbine generators.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a device for picking up the surface defects of a wind turbine generator blade and a lens layout method with reasonable structural design.
The invention solves the problems by adopting the following technical scheme: the wind turbine generator blade surface defect taking device is characterized in that: the system comprises a camera group for shooting images, a bracket for arranging the camera group, a positioning camera, an image processing server, a communication cable and an alternating current power supply; the camera group is installed on the support, the positioning camera is installed on the side face of the camera group and is located in the middle of the camera group, the camera group and the positioning camera are connected with the image processing server through the communication cable, and the image processing server is connected with the alternating current power supply.
Further, the plurality of eyepieces of the camera group are arranged in an arc.
Further, the length of the communication cable is 100m.
Further, the camera group, the positioning camera and the image processing server are all connected with an alternating current power supply through communication cables.
Further, another technical object of the present invention is to provide a lens layout method of a wind turbine blade surface defect taking device.
The technical purpose of the invention is achieved by the following technical scheme.
A lens layout method of a wind turbine blade surface defect taking device is characterized in that: the lens layout method comprises the following steps:
arranging a plurality of cameras into a row, and installing the cameras on a bracket, so that ocular lenses of the cameras are arranged on a section of arc line to form a camera group; the positioning camera is arranged on the side face of the camera group and is positioned in the middle of the camera group, and is used for providing positioning for the camera group, ensuring that the whole of the photographed blade is positioned in the view finding range of the camera group and ensuring that the minimum resolution of the photographed image is 5mm; the data acquired by the camera group are transmitted to the image processing server for processing through the communication cable, and the alternating current power supply supplies power for the equipment; different object distances can be generated by different placement positions of the cameras and different inclination angles of the fan blades.
Compared with the prior art, the invention has the following advantages:
1. the system has the advantages of simple structure, compact structure and strong practicability, is suitable for the wind power industry, has operability, and is a good method proved by practice.
2. The camera group for shooting images is arranged in an arc shape, so that the view finding range is increased, the whole blade can be shot, and the actual shooting requirements of the windmill blade with the length of 60m and the width of 6m are met.
3. The method has the advantages of high sensitivity, high calculation speed, visual and vivid results and the like.
4. The method has strong operability, the index is rational and reasonable on the basis of considering scientificity, and the original data is convenient to acquire, so that the method has operability.
5. The comparability is strong.
6. The guidance is strong, the statistics is quantized, and data can be provided for scientific research.
7. Has wide applicability.
Drawings
FIG. 1 is a schematic diagram of the front view of the device for picking up surface defects of blades of a wind turbine generator system according to the present invention.
FIG. 2 is a schematic side view of a device for picking up surface defects of a blade of a wind turbine generator system according to the present invention.
FIG. 3 is a schematic top view of a device for picking up surface defects of a fan-motor unit blade according to the present invention.
Fig. 4 is a schematic diagram of embodiment 1 of the present invention.
Fig. 5 is a schematic diagram of embodiment 2 of the present invention.
In the figure: a camera group 1, a bracket 2, a positioning camera 3, an image processing server 4, a communication cable 5 and an alternating current power supply 6.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1 to 5, it should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are shown only for the purpose of understanding and reading by those skilled in the art, and are not intended to limit the applicable limitations of the present invention, so that any structural modification, change in proportion, or adjustment of size does not have any technical significance, and all fall within the scope of the technical content of the present invention without affecting the efficacy and achievement of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "a" are used for descriptive purposes only and are not intended to limit the scope of the invention, but are also intended to be within the scope of the invention without any substantial modification to the technical content.
The device for picking up the surface defects of the blades of the wind turbine generator in the embodiment comprises a camera group 1 for shooting images, a bracket 2 for laying out the camera group 1, a positioning camera 3, an image processing server 4, a communication cable 5 and an alternating current power supply 6; the length of the communication cable 5 is 100m.
The camera group 1 in this embodiment is mounted on the support 2, the plurality of eyepieces of the camera group 1 are arranged in an arc, the positioning camera 3 is mounted on the side face of the camera group 1 and is located in the middle of the camera group 1, the camera group 1 and the positioning camera 3 are connected with the image processing server 4 through the communication cable 5, the image processing server 4 is connected with the ac power supply 6, and the camera group 1, the positioning camera 3 and the image processing server 4 are connected with the ac power supply 6 through the communication cable 5.
The lens layout method of the wind turbine blade surface defect taking device in the embodiment comprises the following steps: arranging a plurality of cameras in a row and mounting the cameras on a bracket 2, so that eyepieces of the cameras are arranged on a section of arc line to form a camera group 1; the positioning camera 3 is arranged on the side face of the camera group 1 and is positioned in the middle of the camera group 1, and is used for providing positioning for the camera group 1, ensuring that the whole of the photographed blade is positioned in the view finding range of the camera group 1 and ensuring that the minimum resolution of the photographed image is 5mm; the data acquired by the camera group 1 are transmitted to the image processing server 4 for processing through the communication cable 5, and the alternating current power supply 6 supplies power for the equipment; different object distances can be generated by different placement positions of the cameras and different inclination angles of the fan blades.
TABLE 1 main technical parameters of camera group
| Index name | Effective area of | Pixel area | Resolution ratio |
| Unit (B) | mm | um | / |
| Numerical value | 12.7*9.52 | 3.1*3.1 | 4192*3128 |
TABLE 2 Main technical parameters of blade
| Blade | Long length | Wide width of |
| Unit (B) | m | m |
| Numerical value | 60 | 6 |
The splicing results of different object distances, focal lengths, inclination angles and lens numbers in the embodiment are as follows:
example 1:80m object distance, 7 85mm focal length lenses, inclination angle 7 °, 14 °, 21 ° lens concatenation condition: the overlapping areas were 2.012, 2.07, 2.213m in order. The overall field of view is 76.2m. The imaging size was 12.6572 x 9.4664mm, and the single lens field was 11.9 x 8.9m. See FIG. 4 for an illustration
Example 2:69.1m object distance, 6 50mm focal length lenses, tilt angle 3.5 °, 9.5 °, 17.5 ° lens concatenation condition: the overlap areas were 10.4m and 8.3m, respectively. The total field of view is 64.5m. The imaging size was 12.85 x 9.41mm, and the single lens field was 17.75 x 13m. See FIG. 5 for an illustration
In summary, the wind turbine generator blade surface defect taking device and the lens layout method have the following advantages:
1. the system has the advantages of simple structure, compact structure and strong practicability, is suitable for the wind power industry, has operability, and is a good method proved by practice.
2. The assembly and disassembly on site are convenient.
3. The defects of the fan blades can be detected, classified and positioned.
4. The camera group for shooting images is arranged in an arc shape, so that the view finding range is increased, the whole blade can be shot, and the actual shooting requirements of the windmill blade with the length of 60m and the width of 6m are met.
5. The method has the advantages of high sensitivity, high calculation speed, visual and vivid results and the like.
6. The method has strong operability, the index is rational and reasonable on the basis of considering scientificity, and the original data is convenient to acquire, so that the method has operability.
7. The comparability is strong.
8. The guidance is strong, the statistics is quantized, and data can be provided for scientific research.
9. Has wide applicability.
From the above description, those skilled in the art will be able to practice.
In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present invention. Equivalent or simple changes of the structure, characteristics and principle of the present invention are included in the protection scope of the present invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The utility model provides a wind turbine generator system blade surface defect device of getting it number which characterized in that: comprises a camera group (1) for shooting images, a bracket (2) for laying out the camera group (1), a positioning camera (3), an image processing server (4), a communication cable (5) and an alternating current power supply (6); the camera group (1) is arranged on the bracket (2), the positioning camera (3) is arranged on the side face of the camera group (1) and is positioned in the middle of the camera group (1), the camera group (1) and the positioning camera (3) are connected with the image processing server (4) through the communication cable (5), and the image processing server (4) is connected with the alternating current power supply (6);
the lens layout method of the wind turbine blade surface defect taking device comprises the following steps:
arranging a plurality of cameras into a row and mounting the cameras on a bracket (2) so that eyepieces of the cameras are arranged on a section of arc line to form a camera group (1); the positioning camera (3) is arranged on the side face of the camera group (1) and is positioned in the middle of the camera group (1), and is used for providing positioning for the camera group (1), ensuring that the whole of the photographed blade is positioned in the view-finding range of the camera group (1) and ensuring that the minimum resolution of the photographed image is 5mm; the data acquired by the camera group (1) are transmitted to the image processing server (4) for processing through the communication cable (5), and the alternating current power supply (6) provides power for the equipment; different object distances can be generated by different placement positions of the cameras and different inclination angles of the fan blades.
2. The wind turbine blade surface defect taking device according to claim 1, wherein: the plurality of eyepieces of the camera group (1) are arranged in an arc line.
3. The wind turbine blade surface defect taking device according to claim 1, wherein: the length of the communication cable (5) is 100m.
4. The wind turbine blade surface defect taking device according to claim 1, wherein: the camera group (1), the positioning camera (3) and the image processing server (4) are all connected with an alternating current power supply (6) through a communication cable (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910523766.0A CN110274917B (en) | 2019-06-17 | 2019-06-17 | Wind turbine generator blade surface defect taking device and lens layout method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910523766.0A CN110274917B (en) | 2019-06-17 | 2019-06-17 | Wind turbine generator blade surface defect taking device and lens layout method |
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| CN110274917A CN110274917A (en) | 2019-09-24 |
| CN110274917B true CN110274917B (en) | 2023-12-05 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120132804A (en) * | 2011-05-30 | 2012-12-10 | 대우조선해양 주식회사 | Apparatus and method for automatic inspecting wind blade |
| CN202856860U (en) * | 2012-08-09 | 2013-04-03 | 周东风 | Combined type ultra-wide high pixel digital photographic equipment |
| KR20140001310A (en) * | 2012-06-25 | 2014-01-07 | 전자부품연구원 | Aerogenerator having blade inspection function and blade inspection method thereof |
| CN104865269A (en) * | 2015-04-13 | 2015-08-26 | 华北理工大学 | Wind turbine blade fault diagnosis method |
| CN108152295A (en) * | 2018-01-19 | 2018-06-12 | 河南志格新能源科技有限公司 | Wind generator set blade surface defect intelligent checking system |
| CN109060826A (en) * | 2018-08-16 | 2018-12-21 | 大连维德集成电路有限公司 | A kind of non-stop-machine wind electricity blade detection device |
| CN210639103U (en) * | 2019-06-17 | 2020-05-29 | 华电电力科学研究院有限公司 | Wind turbine generator system blade surface defect access device |
-
2019
- 2019-06-17 CN CN201910523766.0A patent/CN110274917B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120132804A (en) * | 2011-05-30 | 2012-12-10 | 대우조선해양 주식회사 | Apparatus and method for automatic inspecting wind blade |
| KR20140001310A (en) * | 2012-06-25 | 2014-01-07 | 전자부품연구원 | Aerogenerator having blade inspection function and blade inspection method thereof |
| CN202856860U (en) * | 2012-08-09 | 2013-04-03 | 周东风 | Combined type ultra-wide high pixel digital photographic equipment |
| CN104865269A (en) * | 2015-04-13 | 2015-08-26 | 华北理工大学 | Wind turbine blade fault diagnosis method |
| CN108152295A (en) * | 2018-01-19 | 2018-06-12 | 河南志格新能源科技有限公司 | Wind generator set blade surface defect intelligent checking system |
| CN109060826A (en) * | 2018-08-16 | 2018-12-21 | 大连维德集成电路有限公司 | A kind of non-stop-machine wind electricity blade detection device |
| CN210639103U (en) * | 2019-06-17 | 2020-05-29 | 华电电力科学研究院有限公司 | Wind turbine generator system blade surface defect access device |
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