Wind tunnel test system for full-circumferential three-dimensional displacement measurement

Abstract

The invention discloses a wind tunnel test system for full-circumferential three-dimensional displacement measurement, and the system comprises a wind tunnel which comprises a test section which is internally provided with a placement position which is used for placing an object to be monitored; the reflective marking piece is suitable for being placed at a monitoring sampling point of an object to be monitored; the plurality of image acquisition modules are arranged in the test section, the plurality of image acquisition modules are arranged at intervals in the circumferential direction of the placement position and are arranged at the top of the test section, and the image acquisition modules are used for acquiring wind vibration images of the monitoring sampling points of the to-be-monitored object. According to the wind tunnel test system for full-circumferential three-dimensional displacement measurement in the embodiment of the invention, the plurality of image acquisition modules can realize full-circumferential three-dimensional displacement measurement of the monitoring sampling point, and in addition, the image acquisition modules are located at the top of the test section, so that the image acquisition modules can be prevented from generating adverse effects such as shielding and disturbance on a flow field of a to-be-monitored object, and the test accuracy is improved. And the measurement precision of the wind tunnel test system is improved.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel testing technology, and in particular to a wind tunnel testing system for measuring three-dimensional displacement in the full circumference. Background Technology

[0002] With technological advancements, the fields of architecture, structure, and engineering are increasingly moving towards larger scales. To ensure the safety of large structures, accurate analysis of their dynamic characteristics under wind loads is crucial. Wind tunnel testing, as a vital method for studying the wind-induced response of structures, has received widespread attention from both academia and engineering. However, in wind tunnel testing of related technologies, the accuracy of measurement techniques is often poor, directly affecting the accuracy and reliability of experimental data. Summary of the Invention

[0003] This invention proposes a wind tunnel test system for full-circumferential three-dimensional displacement measurement, which has the advantages of strong anti-interference ability and high measurement accuracy.

[0004] A wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention includes: a wind tunnel, the wind tunnel including a test section, the test section having a placement position for placing an object to be monitored; a reflective marker adapted to be placed at a monitoring sampling point of the object to be monitored; and multiple image acquisition modules disposed within the test section, the multiple image acquisition modules being arranged at circumferential intervals along the placement position and disposed at the top of the test section, the image acquisition modules being used to acquire wind vibration images of the monitoring sampling points of the object to be monitored.

[0005] According to an embodiment of the present invention, the wind tunnel test system for full circumferential three-dimensional displacement measurement includes an image acquisition module with multiple image acquisition modules arranged at circumferential intervals along the placement position. This allows the multiple image acquisition modules to acquire wind vibration images of the monitoring sampling points from multiple different positions along the circumference of the placement position, thereby enabling full circumferential three-dimensional displacement measurement of the monitoring sampling points. Furthermore, the image acquisition modules are located at the top of the test section, which avoids adverse effects such as occlusion or disturbance of the flow field of the object to be monitored, thus improving the measurement accuracy of the wind tunnel test system.

[0006] According to some embodiments of the present invention, at least one image acquisition module is provided on each of the opposite sides of the placement position along the first direction and on each of the opposite sides of the second direction, wherein the first direction and the second direction are parallel to the horizontal plane and the first direction is perpendicular to the second direction.

[0007] According to some embodiments of the present invention, the distance between the plurality of image acquisition modules and the placement position is the same.

[0008] According to some embodiments of the present invention, the image acquisition module includes an image acquisition device and an adjustment support. The adjustment support is disposed at the top of the test section, and the image acquisition device is disposed on the adjustment support. The adjustment support is used at least to adjust the pitch angle and the rotation angle along the horizontal direction of the image acquisition device.

[0009] According to some embodiments of the present invention, the adjusting support includes a base, a rotating connecting seat, and a fixed bracket. The image acquisition device is disposed on the base. The base is rotatably disposed on the rotating connecting seat about a first axis extending in a horizontal direction. The rotating connecting seat is rotatably disposed on the fixed bracket about a second axis extending in a vertical direction. The fixed bracket is disposed on the wall of the test section.

[0010] According to some embodiments of the present invention, the fixed bracket includes a fixed part and a supporting part. The fixed part is disposed on the wall of the test section, the supporting part is slidably disposed on the fixed part along the width direction of the wind tunnel, and the rotating connecting seat is disposed on the supporting part.

[0011] According to some embodiments of the present invention, the rotating connecting seat and the fixed part are located at opposite ends of the support part along the width direction of the wind tunnel.

[0012] According to some embodiments of the present invention, the wind tunnel test system for full-circumferential three-dimensional displacement measurement further includes: a laser displacement detection module, which is disposed at the placement position and used to detect the wind vibration displacement of the monitoring sampling point of the object to be monitored.

[0013] According to some embodiments of the present invention, the laser displacement detection module is located on the side of the placement position away from the air inlet end of the test section.

[0014] According to some embodiments of the present invention, the laser displacement detection module includes a mounting rod and a plurality of laser displacement gauges, wherein the plurality of laser displacement gauges are arranged on the mounting rod in a vertical direction.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a wind tunnel test system for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of region A in the middle; Figure 3 This is a top view of a wind tunnel test system for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention; Figure 4 This is an exploded view of the image acquisition module of a wind tunnel test system for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention. Figure 5 This is an exploded view of the fixed support of a wind tunnel test system for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the laser displacement detection module and the object to be monitored in a wind tunnel test system for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention.

[0017] Figure label: 100. Wind tunnel test system for full-circumferential three-dimensional displacement measurement; 1. Wind tunnel; 11. Test section; 12. Placement position; 2. Reflective marker; 3. Image acquisition module; 31. Image acquisition device; 32. Adjustable support; 321. Base; 322. Rotary connecting seat; 323. Fixed bracket; 3231. Fixing part; 3232. Support part; 3233. Support seat; 4. Laser displacement detection module; 41. Mounting rod; 42. Laser displacement meter; 200. Items to be monitored. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0022] In the description of this invention, "a plurality of" means two or more.

[0023] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0024] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0025] The following description, with reference to the accompanying drawings, describes a wind tunnel testing system 100 for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention.

[0026] like Figures 1 to 3 As shown, the wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement according to an embodiment of the present invention includes: a wind tunnel 1, a reflective marker 2, and an image acquisition module 3. The wind tunnel 1 includes a test section 11, and a placement position 12 is provided in the test section 11. For example, the placement position 12 can be provided on the bottom wall of the test section 11. The placement position 12 is used to place the object to be monitored 200. The reflective marker 2 is suitable for being placed at the monitoring sampling point of the object to be monitored 200. The image acquisition module 3 is provided in the test section 11 and there are multiple modules. The multiple image acquisition modules 3 are arranged at intervals along the circumference of the placement position 12 and are provided on the top of the test section 11. The image acquisition module 3 is used to acquire wind vibration images of the monitoring sampling points of the object to be monitored 200.

[0027] In other words, during the testing of the object to be monitored 200 by the wind tunnel test system 100 using full-circumferential three-dimensional displacement measurement, the object to be monitored 200 is placed on the placement position 12, and reflective markers 2 are set at the monitoring sampling points of the object to be monitored 200. These reflective markers 2 can be reflective patches, which are easy to install. By setting reflective markers 2 at the monitoring sampling points of the object to be monitored 200, the reflective markers 2 can more clearly mark the location of the monitoring sampling points through reflection, serving as visual markers for the image acquisition module 3 to acquire images. This allows the image acquisition module 3 to more accurately acquire wind vibration images of the monitoring sampling points, avoiding the difficulties of difficult placement and capture of monitoring sampling points, strong interference, and low measurement accuracy. Simultaneously, the image acquisition module 3 can perform non-contact optical measurements on the object to be monitored 200, fundamentally avoiding interference from the support structure and wiring on the test wind field and model characteristics. It should be noted that the wind vibration image of the monitoring sampling point refers to the image of the monitoring sampling point of the object to be monitored 200 vibrating under the action of airflow in wind tunnel 1.

[0028] Since multiple image acquisition modules 3 are arranged at circumferential intervals along the placement position 12, they can acquire wind vibration images of the monitoring sampling points from multiple different positions around the placement position 12, thereby enabling full-circumferential three-dimensional displacement measurement of the monitoring sampling points. Furthermore, the image acquisition modules 3 are located at the top of the test section 11. After the object to be monitored 200 is placed in the placement position 12, the image acquisition modules 3 are positioned above the object to be monitored 200. This avoids the image acquisition modules 3 obstructing or disturbing the flow field of the object to be monitored 200, thus preventing interference with the wind vibration displacement test of the object to be monitored 200 and improving the measurement accuracy of the wind tunnel test system.

[0029] According to an embodiment of the present invention, the wind tunnel test system 100 for full circumferential three-dimensional displacement measurement has multiple image acquisition modules 3 arranged at circumferential intervals along the placement position 12. This allows the multiple image acquisition modules 3 to acquire wind vibration images of the monitoring sampling points from multiple different positions around the placement position 12, thereby enabling full circumferential three-dimensional displacement measurement of the monitoring sampling points. In addition, the image acquisition modules 3 are located at the top of the test section 11, which can avoid the image acquisition modules 3 from causing adverse effects such as obstruction or disturbance to the flow field of the object under monitoring 200, thus improving the measurement accuracy of the wind tunnel test system 100.

[0030] According to some embodiments of the present invention, such as Figure 3As shown, at least one image acquisition module 3 is provided on each of the opposite sides of the placement position 12 along the first direction and on each of the opposite sides of the second direction. The first and second directions are parallel to the horizontal plane and the first direction is perpendicular to the second direction. That is, image acquisition modules 3 are provided on each of the opposite sides of the placement position 12 along the first direction and on each of the opposite sides of the placement position 12 along the second direction. After the object to be monitored 200 is placed on the placement position 12, the wind vibration displacement images of the object to be monitored 200 along the opposite sides of the first direction can be acquired by the multiple image acquisition modules 3 located on the opposite sides of the placement position 12 along the first direction, and the wind vibration displacement images of the object to be monitored 200 along the opposite sides of the first direction can be acquired by the image acquisition modules 3 located on the opposite sides of the placement position 12 along the second direction. Thus, the full circumferential three-dimensional displacement measurement of the object to be monitored 200 can be realized by at least four image acquisition modules 3, which is beneficial to improving the measurement accuracy of the wind tunnel test system 100.

[0031] In a specific example, two image acquisition modules 3 are provided on opposite sides of the placement position 12 in a direction perpendicular to the airflow direction within the test section 11. The two image acquisition modules 3 located on the same side of the placement position 12 are orthogonally placed along the airflow direction within the test section 11 to simultaneously capture a sequence of wind vibration images of the object to be monitored 200, thereby achieving synchronous displacement measurement at multiple points in the full circumference.

[0032] According to some embodiments of the present invention, the distances between the multiple image acquisition modules 3 and the placement position 12 are the same. Since the multiple image acquisition modules 3 are at the same distances from the placement position 12, the focal lengths between the multiple image acquisition modules 3 and the object to be monitored 200 located at the placement position 12 are the same, thereby reducing the difficulty of the multiple image acquisition modules 3 simultaneously focusing on the object to be monitored 200 located at the placement position 12.

[0033] According to some embodiments of the present invention, such as Figure 2 As shown, the image acquisition module 3 includes an image acquisition unit 31 and an adjustment support 32. The adjustment support 32 is located at the top of the test section 11, and the image acquisition unit 31 is mounted on the adjustment support 32. The adjustment support 32 is used to adjust at least the pitch angle and the rotation angle along the horizontal direction of the image acquisition unit 31. That is, the tilt angle of the image acquisition unit 31 relative to the horizontal plane can be adjusted by adjusting the support 32, and the horizontal shooting angle of the image acquisition unit 31 can also be adjusted by adjusting the support 32. This significantly improves the flexibility of adjusting the shooting range of the image acquisition unit 31, allowing it to more accurately align with the object 200 under test, thereby improving the clarity of the image acquired by the image acquisition unit 31.

[0034] In some embodiments, the image acquisition unit 31 is a high-speed camera, enabling it to clearly capture high-frequency vibration images of the object under monitoring 200. Multiple image acquisition modules 3 can be connected to a visual displacement analyzer and a data processing system via transmission lines. The visual displacement analyzer and data processing system adjust the brightness, sampling frequency, and camera angle of the image acquisition unit 31. When the object under monitoring 200 vibrates, the visual displacement analyzer and data processing system adjust the focal length of the high-speed camera, perform necessary calibration and parameter settings, and clearly capture images of the object under monitoring 200. Furthermore, the visual displacement analyzer and data processing system acquire the video captured by the high-speed camera, and by identifying the sampling points of the object under monitoring 200 in the video, calculate the vibration displacement of the object under monitoring 200.

[0035] According to some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the adjustable support 32 includes a base 321, a rotating connecting seat 322, and a fixed bracket 323. The image acquisition device 31 is mounted on the base 321. The base 321 is rotatably mounted on the rotating connecting seat 322 around a first axis that extends horizontally. The rotating connecting seat 322 is rotatably mounted on the fixed bracket 323 around a second axis that extends vertically. The fixed bracket 323 is mounted on the wall of the test section 11. Therefore, by controlling the rotation of the base 321 relative to the rotating connecting seat 322, the pitch angle of the image acquisition device 31 can be adjusted. By rotating the rotating connecting seat 322 relative to the fixed bracket 323, the shooting range of the image acquisition device 31 in the circumferential direction of the rotating connecting seat 322 can be adjusted. Thus, through the cooperation of the base 321, the rotating connecting seat 322, and the fixed bracket 323, the pitch angle of the image acquisition device 31 and the shooting range in the circumferential direction of the rotating connecting seat 322 can be flexibly adjusted to ensure that the image acquisition device 31 can accurately align with the object to be monitored 200, thereby improving the clarity of the image acquisition device 31 capturing the object to be monitored 200.

[0036] According to some embodiments of the present invention, such as Figure 5As shown, the fixed bracket 323 includes a fixed part 3231 and a supporting part 3232. The fixed part 3231 is disposed on the wall of the test section 11, and the supporting part 3232 is slidably disposed on the fixed part 3231 along the width direction of the wind tunnel 1. A rotating connecting seat 322 is disposed on the supporting part 3232. The width direction of the wind tunnel 1 refers to the direction parallel to the horizontal plane and perpendicular to the arrangement direction of the air inlet and outlet ends of the test section 11. That is, the position of the supporting part 3232 in the width direction of the wind tunnel 1 can be adjusted by sliding the supporting part 3232 relative to the fixed part 3231. Furthermore, since the image acquisition device 31 is connected to the supporting part 3232 through the base 321 and the rotating connecting seat 322, the position of the image acquisition device 31 in the width direction of the wind tunnel 1 can be adjusted by moving the supporting part 3232 relative to the fixed part 3231 to meet the imaging requirements of the object to be monitored 200.

[0037] In a specific example, the fixing part 3231 is an L-shaped steel section, and the supporting part 3232 is a U-shaped channel steel that opens downwards. The fixing part 3231 includes a first connecting part and a second connecting part, which are arranged vertically. The first connecting part is connected to the wall of the test section 11, and the second connecting part is connected to the bottom of the fixing part 3231. The second connecting part and the fixing part 3231 are connected by fasteners. A first connecting hole for installing fasteners is formed on the second connecting part, and a second connecting hole for installing fasteners is formed on the fixing part 3231. At least one of the first connecting hole and the second connecting hole is a waist-shaped hole extending along the width direction of the wind tunnel 1, so that the relative position of the second connecting part and the fixing part 3231 along the width direction of the wind tunnel 1 can be adjusted by the waist-shaped hole to adjust the position of the image acquisition device 31 in the width direction of the wind tunnel 1.

[0038] According to some embodiments of the present invention, the rotating connecting seat 322 and the fixed part 3231 are located at opposite ends of the support part 3232 along the width direction of the wind tunnel 1. This increases the distance between the rotating connecting seat 322 and the fixed part 3231 along the width direction of the wind tunnel 1, thereby increasing the distance between the image acquisition device 31 and the fixed part 3231 along the width direction of the wind tunnel 1. This provides the image acquisition device 31 with greater movement space, avoiding the risk of it hitting walls during movement.

[0039] In a specific example, the image acquisition device 31 includes a camera body and a camera lens. The image acquisition device 31 is connected to the base 321 by bolts. The bottom of the rotating connecting seat 322 is provided with casters. The fixed bracket 323 also includes a support seat 3233, which is located on the support part 3232. The rotating base 321 is rotatably connected to the support seat 3233 through the casters, so that the image acquisition device 31 can rotate 360° to adjust the shooting angle of the image acquisition device 31.

[0040] According to some embodiments of the present invention, such as Figure 1 and Figure 6 As shown, the wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement also includes a laser displacement detection module 4. The laser displacement detection module 4 is located at the placement position 12 and is used to detect the wind vibration displacement of the monitoring sampling points of the object under test 200. Specifically, the laser displacement detection module 4 enables parallel synchronous testing and analysis of multi-channel ultra-dynamic signals to provide comparative data. Specifically, the laser displacement detection module 4 can accurately acquire the wind vibration displacement of the monitoring sampling points of the object under test 200. The accuracy of the wind vibration displacement acquired by the monitoring sampling points can be judged by comparing it with that acquired by the image acquisition module 3. That is, the laser displacement detection module 4 can correct the measurement results of the image acquisition module 3, thereby improving the measurement accuracy of the wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement. In other words, the wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement features high measurement accuracy, wide measurement range, non-contact operation, and zero interference.

[0041] Specifically, the laser displacement detection module 4 also includes an ultra-dynamic signal tester, a laser displacement meter 42, a transformer power supply, a PC, and a self-developed signal acquisition and data processing system. The laser displacement meter 42 is connected to the ultra-dynamic signal tester. The analysis system of the ultra-dynamic signal tester can be expanded using a gigabit Ethernet switch. A single computer can realize parallel synchronous testing and analysis of ultra-dynamic signals from an unlimited number of channels, thereby improving the accuracy of obtaining the wind vibration displacement at the monitoring sampling point of the object to be monitored 200 through the laser displacement detection module 4.

[0042] According to some embodiments of the present invention, the laser displacement detection module 4 is located on the side of the placement position 12 away from the air inlet end of the test section 11. That is, after the object to be monitored 200 is placed in the placement position 12, the laser displacement detection module 4 is located on the leeward side of the object to be monitored 200, that is, the airflow first flows through the object to be monitored 200 and then flows through the laser displacement detection module 4. Thus, the laser displacement detection module 4 can be better prevented from blocking or interfering with the airflow blowing towards the object to be monitored 200, that is, the image acquisition module 3 can be prevented from interfering with the wind vibration displacement test of the object to be monitored 200, which is beneficial to improving the measurement accuracy of the wind tunnel test system.

[0043] According to some embodiments of the present invention, the laser displacement detection module 4 includes a mounting rod 41 and a plurality of laser displacement gauges 42, which are arranged vertically on the mounting rod 41. Thus, by setting multiple laser displacement gauges 42 arranged vertically, the displacement measurement of the object 200 at different heights can be flexibly adapted. For example, when the object 200 is high, the measurement can be performed using the laser displacement gauge 42 at a higher position on the mounting rod; when the object 200 is low, the measurement can be performed using the laser displacement gauge 42 at a lower position on the mounting rod. Furthermore, the multiple laser displacement gauges 42 arranged vertically can detect the wind-induced displacement of the object 200 at multiple locations along the vertical direction, thereby making the wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement applicable to test scenarios with different heights and dimensions and different testing requirements, thus significantly improving the applicability of the wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement.

[0044] According to some embodiments of the present invention, the measurement method of the wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement is as follows: Step 1: Fix the object to be monitored 200 in the placement position 12, and set the reflective marker 2 at the monitoring sampling point of the object to be monitored 200.

[0045] Step 2: Adjust the brightness, sampling frequency, and camera angle of image acquisition module 3 according to the measurement requirements through the visual displacement analysis system, and start the measurement program; Step 3: Airflow is delivered to test section 11. After the monitored object 200 vibrates, the focal length of the image acquisition module 3 is adjusted through the visual displacement analysis system, and vibration images at the monitoring sampling points of the monitored object 200 are captured. Step 4: Based on the wind vibration images of the monitoring sampling points obtained by the image acquisition module 3, the visual displacement analyzer continuously captures multiple frames of images and uses computer vision technology to analyze and calculate the vibration displacement at the monitoring sampling points of the object to be monitored 200. Step 5: Simultaneously test the vibration position of the monitoring sampling point through the laser displacement monitoring module to calibrate the vibration displacement of the monitoring sampling point obtained by the image acquisition module 3.

[0046] Step 6: The analysis software will display the measurement results in real time, including numerical and graphical representations of parameters such as displacement, deformation, and velocity.

[0047] The wind tunnel test system 100 for full-circumferential three-dimensional displacement measurement in this application has strong anti-electromagnetic interference capability, small equipment size, and convenient assembly and disassembly. While ensuring measurement accuracy, it significantly improves the overall efficiency of wind tunnel test 1.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wind tunnel testing system for full-circumferential three-dimensional displacement measurement, characterized in that, include: A wind tunnel, comprising a test section, wherein a placement area is provided within the test section for placing an object to be monitored; Reflective markers are suitable for placement at the monitoring sampling points of the object to be monitored; An image acquisition module is provided within the test section, and multiple image acquisition modules are arranged at circumferential intervals along the placement position and located at the top of the test section. The image acquisition module is used to acquire wind vibration images of the monitoring sampling points of the object to be monitored.

2. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 1, characterized in that, At least one image acquisition module is provided on each of the opposite sides of the placement position along the first direction and on each of the opposite sides of the second direction. The first direction and the second direction are parallel to the horizontal plane and the first direction is perpendicular to the second direction.

3. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 1, characterized in that, The distance between the multiple image acquisition modules and the placement position is the same.

4. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 1, characterized in that, The image acquisition module includes an image acquisition device and an adjustment support. The adjustment support is located at the top of the test section, and the image acquisition device is located on the adjustment support. The adjustment support is used to adjust at least the pitch angle and the rotation angle along the horizontal direction of the image acquisition device.

5. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 4, characterized in that, The adjustable support includes a base, a rotating connecting seat, and a fixed bracket. The image acquisition device is mounted on the base. The base is rotatably mounted on the rotating connecting seat around a first axis that extends horizontally. The rotating connecting seat is rotatably mounted on the fixed bracket around a second axis that extends vertically. The fixed bracket is mounted on the wall of the test section.

6. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 5, characterized in that, The fixed bracket includes a fixed part and a supporting part. The fixed part is disposed on the wall of the test section, and the supporting part is slidably disposed on the fixed part along the width direction of the wind tunnel. The rotating connecting seat is disposed on the supporting part.

7. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 6, characterized in that, The rotating connecting seat and the fixed part are located at opposite ends of the support part along the width direction of the wind tunnel.

8. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 1, characterized in that, Also includes: A laser displacement detection module is located at the placement position and is used to detect the wind-induced displacement of the monitoring sampling point of the object to be monitored.

9. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 8, characterized in that, The laser displacement detection module is located on the side of the placement position away from the air inlet end of the test section.

10. The wind tunnel testing system for full-circumferential three-dimensional displacement measurement according to claim 9, characterized in that, The laser displacement detection module includes a mounting rod and multiple laser displacement gauges, which are arranged vertically on the mounting rod.

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