Picture acquisition device for appearance defect detection of fan blade

Abstract

The utility model provides a fan blade appearance defect detection picture acquisition device, and particularly relates to the technical field of mechanical devices, the fan blade appearance defect detection picture acquisition device comprises an annular adjustable supporting frame, the annular adjustable supporting frame is composed of at least two arc-shaped ends through telescopic rods, and the inner diameter of the annular adjustable supporting frame can be adjusted to adapt to fan blades with different diameters. The annular track is arranged above the annular adjustable supporting frame, a driving motor is arranged below one end of the annular track, a sliding block is connected to the annular track in a sliding mode, an image collecting assembly is arranged above the sliding block, and a light supplementing module is arranged behind the image collecting assembly; by means of the synchronous telescopic design of the annular adjustable supporting frame and the annular track, the blade fixing support can be matched with various blades with different diameters, the problem that a traditional fixing support is poor in compatibility is solved, the annular guide track is driven by a magnetic adsorption guide rail and a gear in a meshed mode, sliding blocks are prevented from slipping or deviating, and the precision of an image collecting path is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine blade inspection devices, specifically to a wind turbine blade appearance defect detection image acquisition device. Background Technology

[0002] As a crucial gas conveying device in the industrial field, the surface quality of the blades of Roots blowers directly affects the equipment's operating efficiency and service life. Traditional external defect detection mainly relies on manual visual inspection, which suffers from low inspection efficiency, strong subjectivity, and a high risk of missed defects. In recent years, machine vision inspection technology has been gradually applied to the surface inspection of industrial components; however, existing technologies still have significant shortcomings when considering the unique structure of Roots blower blades.

[0003] Currently, some automated inspection devices on the market use a fixed support frame combined with a linear moving mechanism. However, this type of structure has significant limitations: First, the fixed-size support frame is difficult to adapt to the diameter differences of different blade models, resulting in poor equipment versatility. Second, the track and drive device of a conventional moving mechanism are prone to transmission gaps during circular motion, leading to insufficient image acquisition position accuracy. Third, the curved surface characteristics of blades make it difficult for ordinary single-angle cameras to acquire complete surface images, while existing adjustable supports mostly use multi-axis robotic arm structures, which suffer from high equipment costs and low positioning efficiency. In addition, the complex lighting environment in industrial sites often causes reflections or shadows to interfere with the acquired images. Existing equipment mostly uses fixed-position supplementary lighting, which makes it difficult to achieve uniform illumination compensation.

[0004] To address the aforementioned technical challenges, there is a need for an image acquisition device with adaptive adjustment capabilities, high-precision motion control, and intelligent supplementary lighting, as well as an image acquisition device for detecting surface defects in wind turbine blades that can adapt to different blade sizes. Utility Model Content

[0005] The purpose of this invention is to provide a wind turbine blade appearance defect detection image acquisition device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine blade appearance defect detection image acquisition device, comprising an annular adjustable support frame, a moving mechanism, and an image acquisition component, characterized in that: the annular adjustable support frame is composed of at least two arc-shaped ends connected by telescopic rods; the inner diameter of the annular adjustable support frame is adjustable to adapt to wind turbine blades of different diameters; a moving mechanism is provided above the annular adjustable support frame; the moving mechanism includes an annular track, a drive motor, and a slider; the annular track is located above the annular adjustable support frame, and a drive motor is located below one end of the track; a slider is slidably connected to the annular track; an image acquisition component is located above the slider; and a supplementary lighting module is located behind the image acquisition component.

[0007] Preferably, the annular track of the moving mechanism is a magnetic adsorption type guide rail, which meshes with the track, and the moving speed and direction are controlled by a drive motor.

[0008] Preferably, the image acquisition mechanism includes a column, an adjustment seat, and an image acquisition camera. The column is fixedly installed on a slide, and an adjustment seat is provided above the column. An adjustable angle image acquisition camera is provided above the adjustment seat.

[0009] Preferably, the adjusting seat is a universal joint structure, and its bottom can rotate horizontally by an angle of 0-360°. The image acquisition camera is axially connected through the adjusting seat and can pitch from -30° to +60°.

[0010] Preferably, the supplementary lighting module includes a supplementary lighting support plate and a supplementary light. The supplementary lighting support plate is fixedly installed on the sliders on both sides of the column, and a supplementary light is connected between the two supplementary lighting support plates. The supplementary light is a ring-shaped LED supplementary light, which is used to enhance the image acquisition and shooting effect of the image acquisition camera.

[0011] Preferably, the annular adjustable support frame and the annular track extend and retract synchronously, and the inner wall of the annular adjustable support frame is uniformly provided with three extendable support frames for support and fixation.

[0012] The beneficial effects of this utility model are:

[0013] 1. The device's inner diameter can be continuously adjusted by using a ring-shaped adjustable support frame composed of multiple arc-shaped ends connected by telescopic rods, along with three telescopic support frames evenly distributed inside. This allows for the coverage of wind turbine blades with a diameter difference of 4 meters. At the same time, the synchronous telescopic design of the frame and track ensures that the moving mechanism always maintains the optimal relative distance to the blade surface, significantly improving the device's compatibility with different blade models.

[0014] 2. A combination structure of magnetic adsorption ring track and motor-driven slider is adopted. The magnetic attraction is used to achieve non-contact fixation between the track and the blade surface, avoiding coating damage caused by traditional mechanical clamping. The drive motor precisely controls the movement speed and direction of the slider, and the universal joint structure adjustment seat realizes (360° horizontal rotation + -30° to +60° pitch adjustment). This allows the image acquisition camera to continuously shoot from multiple angles along the blade axis and circumference, eliminating the detection blind spots of traditional fixed image acquisition cameras and greatly improving the defect identification coverage.

[0015] 3. Through the integrated design of the ring LED fill light and the image acquisition camera, highly soft light sources are symmetrically arranged on both sides of the column to form a uniform shadowless lighting environment, effectively overcoming the specular reflection on the blade surface and the interference of backlighting on site, thus improving the contrast of the defect area; the power of the fill light is automatically adjusted according to the focal length of the image acquisition camera to ensure the consistency of light intensity at different shooting distances. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the image acquisition component of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the telescopic rod of this utility model.

[0019] The components in the attached diagram are labeled as follows: 1: Annular adjustable support frame, 21: Annular track, 22: Drive motor, 23: Slider, 31: Column, 32: Adjustment seat, 33: Image acquisition camera, 41: Lighting support plate, 42: Lighting lamp, 5: Telescopic support frame, 6: Telescopic rod. Detailed Implementation

[0020] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0021] This utility model is as follows Figure 1-3 The device shown is a wind turbine blade appearance defect detection image acquisition device: This device consists of an annular adjustable support frame 1, a moving mechanism, and an image acquisition component. The annular adjustable support frame 1 is composed of at least two arc-shaped ends connected by a telescopic rod 6. The telescopic rod 6 is hydraulically driven. By adjusting the length of the telescopic rod 6, the inner diameter of the annular adjustable support frame 1 can be changed to expand and shrink the inner diameter of the frame, adapting to wind turbine blades of different diameters. An annular track 21 is fixedly installed on the top of the annular adjustable support frame 1, and the annular adjustable support frame 1 and the annular track 21 adopt a synchronous telescopic design to solve the problem of poor compatibility of traditional fixed brackets. The annular track 21 is made of aluminum alloy, and a rack and pinion structure is provided on the inner side of the annular track 21.

[0022] The drive motor 22 drives the slider 23 to slide at a constant speed along the annular track 21 through gear and rack meshing. The annular track 21 is a magnetic adsorption guide rail + gear meshing drive. Magnetic adsorption prevents the slider from derailing, adapts to the blade vibration environment, ensures the stability of image acquisition, prevents the slider 23 from slipping or deviating, and improves the accuracy of the image acquisition path. It also avoids vibration interference in windy environments and improves the continuity of image acquisition. An image acquisition component is installed on the top of the slider 23, and a supplementary light module is fixedly installed behind it. The power cord of the supplementary light module shares the same control box as the drive motor 22.

[0023] The image acquisition component includes a column 31, an adjustment seat 32, and an image acquisition camera 33. The column 31 is fixedly installed on the slider 23, and the adjustment seat 32 is set on the top of the column 31. The adjustment seat 32 is a universal joint structure, and its bottom can rotate horizontally to an angle of (0-360° without blind spots). The image acquisition camera 33 is set on the top of the upper adjustment seat 32. The pitch angle can be adjusted (-30° to +60°) through a hinge structure. It can cover the area of ​​blade surface curvature change. The multi-degree-of-freedom adjustment adapts to the blade surface and accurately captures minute defects such as cracks and degumming. It can achieve 360° no-blind-spot shooting of the blade surface.

[0024] The supplementary lighting module consists of two supplementary lighting support plates 41 and a ring LED supplementary light 42. The two supplementary lighting support plates 41 are fixed on both sides of the column 31 above the slider 23, and the ring LED supplementary light 42 is connected between the two supplementary lighting support plates 41. Each group of lights can be independently controlled in terms of brightness and color temperature, which is used to enhance the acquisition and shooting effect of the image acquisition camera 33, eliminate shadow interference, enhance image contrast, and improve the accuracy of defect recognition.

[0025] Working principle: First, adjust the inner diameter of the annular adjustable support frame 1 according to the diameter of the wind turbine blades, and simultaneously adjust the circumference of the annular track 21. The drive motor 22 drives the slider 23 to move in a uniform circular motion along the annular track 21. The image acquisition camera 33 is adjusted to a preset angle through the universal joint adjustment seat 32. With the help of the annular LED supplement light 42, uniform shadowless illumination is improved. Finally, the image acquisition camera 33 continuously takes pictures of the blade surface and transmits the images to an external image processing terminal. The AI ​​algorithm automatically identifies defects such as cracks and corrosion.

[0026] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A wind turbine blade appearance defect detection image acquisition device, comprising an annular adjustable support frame (1), a moving mechanism, and an image acquisition component, characterized in that: The annular adjustable support frame (1) is composed of at least two arc-shaped ends connected by telescopic rods (6). The inner diameter of the annular adjustable support frame (1) is adjustable to accommodate wind turbine blades of different diameters. A moving mechanism is provided above the annular adjustable support frame (1). The moving mechanism includes an annular track (21), a drive motor (22), and a slider (23). The annular track (21) is located above the annular adjustable support frame (1), and a drive motor (22) is located below one end. A slider (23) is slidably connected on the annular track (21). An image acquisition component is located above the slider (23), and a supplementary lighting module is located behind the image acquisition component.

2. The image acquisition device for detecting surface defects in wind turbine blades as described in claim 1, characterized in that: The circular track (21) of the moving mechanism is a magnetic adsorption type guide rail, which meshes with the track and the moving speed and direction are controlled by the drive motor (22).

3. The image acquisition device for detecting surface defects in wind turbine blades as described in claim 1, characterized in that: The image acquisition component includes a column (31), an adjustment seat (32), and an image acquisition camera (33). The column (31) is fixedly installed on the slider (23), and an adjustment seat (32) is provided above the column (31). An adjustable angle image acquisition camera (33) is provided above the adjustment seat (32).

4. The image acquisition device for detecting surface defects in wind turbine blades as described in claim 3, characterized in that: The adjusting seat (32) is a universal joint structure, and its bottom can rotate horizontally by an angle of 0-360°. The image acquisition camera (33) is axially connected through the adjusting seat (32) and can pitch from -30° to +60°.

5. The image acquisition device for detecting surface defects in wind turbine blades as described in claim 3, characterized in that: The supplementary lighting module includes a supplementary lighting support plate (41) and a supplementary light (42). The supplementary lighting support plate (41) is fixedly installed on the sliders (23) on both sides of the column (31). The supplementary light (42) is connected between the two supplementary lighting support plates (41). The supplementary light (42) is a ring-shaped LED supplementary light, which is used to increase the acquisition and photography effect of the image acquisition camera (33).

6. The image acquisition device for detecting surface defects in wind turbine blades as described in claim 1, characterized in that: The annular adjustable support frame (1) and the annular track (21) are designed for synchronous telescopic extension, and the inner wall of the annular adjustable support frame (1) is uniformly provided with three telescopic support frames (5) for support and fixation.

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