CN220339322U - Wind power blade vision measuring device under large visual field - Google Patents
Wind power blade vision measuring device under large visual field Download PDFInfo
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- CN220339322U CN220339322U CN202321809013.4U CN202321809013U CN220339322U CN 220339322 U CN220339322 U CN 220339322U CN 202321809013 U CN202321809013 U CN 202321809013U CN 220339322 U CN220339322 U CN 220339322U
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- 238000005259 measurement Methods 0.000 claims abstract description 22
- 239000003381 stabilizer Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses a wind power blade vision measurement device under a large visual field, which comprises a measured blade, a test bench, blade targets, a binocular camera, a bracket and a group of fixed targets, wherein the left end of the measured blade is fixedly arranged with the control end of the test bench, the right side surfaces of the binocular camera are fixedly arranged with the left side surfaces of the bracket, the front surface of the measured blade is fixedly provided with the group of equidistantly arranged blade targets, and each fixed target is positioned behind the measured blade. This device is through being equipped with fixed binocular inter-camera distance and angle, and binocular camera support is whole for adjusting fixed binocular camera support, and every target point in the binocular vision measurement at least is to be shot by two binocular cameras and just can be solved, and three or more binocular cameras can improve the resolving precision, but test cost also can rise, and the angle of intersection is very big to measuring accuracy's influence, is that measuring accuracy is best near 90 degrees, and the angle of intersection is too big or undersize all can reduce the precision.
Description
Technical Field
The utility model relates to the field of blades, in particular to a wind power blade vision measuring device under a large view field.
Background
The blade is one of the core components of the wind driven generator and accounts for 15% -20% of the total cost. The wind energy conversion rate of the blade is comprehensively considered, the wind energy conversion rate is increased, the wind energy conversion rate is reduced, and the wind energy conversion rate is improved, so that the wind energy conversion rate is improved, and the wind energy conversion rate is improved. This trend in variation places new demands on the testing and monitoring of large blades. The specific requirements for the test technique vary as follows: the length of the currently known global blade is rapidly increased from about 70 meters to about 120m at maximum, and the maximum deformation of the blade is increased from about 10 meters to about 40 m. This is a great challenge for accurate measurement of deformation. In the actual running process of the fan, the fan blade is influenced by various bending moment deformations, out-of-plane deflection deformations and torsional deformations, which all influence the strength and durability of the blade design materials, thereby influencing the power generation efficiency of the fan. The test result is required to output the multi-point data to technicians in real time, and the multi-point data is analyzed and processed in real time according to different specific test requirements of modes, static force, fatigue and the like, so that important data support is provided for blade design model correction, technological parameter improvement, wind field state monitoring and the like.
A certain number of positions should be selected for blade deformation measurement during a write test in the deformation measurement of 10.2.4 in GB/T25384. The number of deformation measurement locations should be sufficient to determine the deformation profile of the entire blade. The number of selected positions should be not less than 3. In the test in the flapwise direction, a sufficient number of positions should be selected for deformation measurement under a sufficiently large load to adequately verify the tip deformation design. The amount of deformation between the 4.9.2 tip and the blade in DNVGL-ST-0376 needs to be measured. The deformation measurement anchor point position needs to be described so as to identify and judge the influence on the test result.
The three-dimensional deformation of any point of the blade is measured by adopting a plurality of groups of stay wire displacement sensors, and the numerical synchronism is poor because the principle of the three-dimensional deformation measuring device adopts mechanical connection and reads numerical values through an encoder, thereby influencing the calculation result. Meanwhile, the installation position and the dead weight of the steel wire rope also influence the uncertainty of the final measurement result. If a laser tracker is adopted, the section of a single blade can be measured, the common measurement cost of a plurality of groups of equipment is high, and meanwhile, the deformation angle and shielding in the process are tested under a relatively large limiting condition. Indoor positioning technologies such as UWB ultra-wideband and ultrasonic positioning can only reach the accuracy of 10cm at present, and signals are easy to absorb and reflect, so that the stability is poor.
In principle, the optical deformation measurement method converts the 3-dimensional real world into a 2-dimensional plane image through binocular camera mapping, and then converts the 2-dimensional image back into coordinates of the 3-dimensional world through photographic geometry measurement. Because the image conversion process has data loss, the whole 3-dimensional world cannot be reconstructed only by 1 image, and the 3-dimensional world shown by the image can be reconstructed by two images at least, and because the photographing and measuring processes are not perfect, more image information is usually needed to enhance the processing process. Optical measurements follow the basic principle of triangulation, and the position of a 3-dimensional spatial point is determined from the line of spatial intersection. For triangulating the set of points, it is necessary to know the position of the binocular camera and the angle of aiming, i.e. the orientation information, and to determine the process of three coordinates of the binocular camera space x, y, z and three tilt angles, i.e. the back convergence.
Therefore, we propose a wind power blade vision measuring device under a large field of view to solve the above problems.
Disclosure of Invention
The utility model aims to provide a wind power blade vision measuring device under a large view field so as to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a wind-powered electricity generation blade vision measuring device under big visual field, includes blade, testboard, blade target, binocular camera, support and a set of fixed target, the left end of blade and the control end fixed mounting of testboard are surveyed, the right flank of binocular camera all with the left surface fixed mounting of support, the front fixed mounting of blade is surveyed has a set of equidistance to arrange the blade target, every fixed target all is located the rear of blade.
In a further embodiment, the bottom surface of the bracket is fixedly connected with two stabilizing plates, the upper surface of each stabilizing plate is fixedly connected with two inclined rods, and the top end of each inclined rod is fixedly connected with the inner top wall of the bracket.
In a further embodiment, the blade targets include a retro-reflective target that is white and a common target that is black.
Compared with the prior art, the utility model has the beneficial effects that:
the tip that this device deflection is great adopts the spherical target, the spherical target has rotatory invariance, its image is irrelevant with the visual angle direction, can adapt to great deformation angle, under the operating mode of big visual field blade measurement, in order to increase target measuring precision, the quantity of system's shooting photo should be more than 20, the diameter of blade installation target is to satisfying binocular camera sensor and is surveyed target test distance and sensor installation space restriction's requirement, the complete region of blade space deformation needs to be covered simultaneously, guarantee the stability of vision system except that binocular camera inner structure's stability, relative stability also can influence final measuring result between two binocular cameras, binocular camera's demarcation can partly revise the systematic error of image point, but can not fully compensate, confirm the distance and the angle between the binocular camera according to measuring space, and fix binocular camera on the support, thereby fix binocular camera inter-distance and angle, binocular camera support is whole for adjusting fixed binocular camera support, every at least need be by two binocular cameras to the complete target in binocular vision measurement, can solve the stability, or can also influence the accuracy is greatly improved to the accuracy is very much, but can both can reduce the accuracy by the accuracy is greatly to the measurement, but can both reduce the accuracy is greatly to the accuracy is the measurement.
Drawings
Fig. 1 is an overall schematic diagram of a wind power blade vision measurement device under a large field of view.
FIG. 2 is a front view of a wind blade vision measurement device blade target under a large field of view.
Fig. 3 is a schematic diagram of a partial structure of a bracket of the vision measuring device for the wind power blade under a large view field.
In the figure: 1. a blade to be tested; 2. a test bench; 3. a leaf target; 31. a common target; 32. a directional light reflecting target; 4. a binocular camera; 5. a bracket; 6. fixing a target point; 7. a diagonal rod; 8. a stabilizing plate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-3, in the wind power blade vision measuring device under a large view field of the present utility model, the wind power blade vision measuring device comprises a measured blade 1, a test bench 2, a blade target 3, a binocular camera 4, a bracket 5 and a set of fixed targets 6, wherein the left end of the measured blade 1 is fixedly installed with the control end of the test bench 2, the right side surface of the binocular camera 4 is fixedly installed with the left side surface of the bracket 5, the front surface of the measured blade 1 is fixedly installed with a set of equidistantly arranged blade targets 3, and each fixed target 6 is positioned behind the measured blade 1.
The bottom surface fixedly connected with two stabilizer plates 8 of support 5, the equal fixedly connected with of upper surface of every stabilizer plate 8 two diagonal rods 7, the top of every diagonal rod 7 all with the interior roof fixed connection of support 5, binocular camera 4 comprises two binocular camera units, the blade 1 of being surveyed can adopt a plurality of group measurement unit network deployment to accomplish the test according to actual need, blade target 3 includes directional reflection of light target 32 and ordinary target 31, directional reflection of light target 32 is white, ordinary target 31 is black.
The working principle of the utility model is as follows:
when in use, the device can test the tested blade 1 through the test bench 2, and the binocular camera 4 is arranged on the support 5, so that the binocular camera 4 shoots the tested blade 1, the binocular camera 4 can shoot accurately by matching with the blade target 3, the fixed target 6 can carry out fixed point prompt, and the accuracy of shooting positions of the binocular camera 4 in the side measurement process can be improved.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. Wind-powered electricity generation blade vision measuring device under big visual field, its characterized in that: including being surveyed blade (1), testboard (2), blade target (3), binocular camera (4), support (5) and a set of fixed target (6), the left end of being surveyed blade (1) and the control end fixed mounting of testboard (2), the right flank of binocular camera (4) all with the left surface fixed mounting of support (5), the front fixed mounting of being surveyed blade (1) has blade target (3) of a set of equidistance range, every fixed target (6) all are located the rear of being surveyed blade (1).
2. The large field of view wind turbine blade vision measurement device of claim 1, wherein: the bottom surface fixedly connected with two stabilizer bars (8) of support (5), every the upper surface of stabilizer bar (8) is all fixedly connected with two diagonal rods (7), every the top of diagonal rod (7) all with the interior roof fixed connection of support (5).
3. The large field of view wind turbine blade vision measurement device of claim 1, wherein: the blade targets (3) comprise directional reflecting targets (32) and common targets (31), the directional reflecting targets (32) are white, and the common targets (31) are black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321809013.4U CN220339322U (en) | 2023-07-11 | 2023-07-11 | Wind power blade vision measuring device under large visual field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321809013.4U CN220339322U (en) | 2023-07-11 | 2023-07-11 | Wind power blade vision measuring device under large visual field |
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| Publication Number | Publication Date |
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| CN220339322U true CN220339322U (en) | 2024-01-12 |
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| CN202321809013.4U Active CN220339322U (en) | 2023-07-11 | 2023-07-11 | Wind power blade vision measuring device under large visual field |
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| CN (1) | CN220339322U (en) |
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2023
- 2023-07-11 CN CN202321809013.4U patent/CN220339322U/en active Active
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