Detection device for wheel tread defect detection

Abstract

The utility model relates to the field of rail train inspection, in particular to a detection device for detecting wheel tread defects, which comprises a mounting base, a sliding base, a supporting base, a rotating base and an image acquisition device which are sequentially arranged from bottom to top, the sliding base is connected to the mounting base in a sliding manner; the supporting base is hinged to the sliding base. The rotating base is rotatably connected to the supporting base; and the image acquisition device is mounted on the rotating base. The position of the image acquisition device in the length direction of the track can be adjusted through the sliding base, the height and the deflection angle of the image acquisition device can be adjusted through the supporting base, and the angle of the image acquisition device can be adjusted through the rotating base. Therefore, the image acquisition direction of the image acquisition device can adapt to various detection environments, and a wheel tread defect image with higher quality can be acquired.

Description

TECHNICAL FIELD

[0001] The utility model relates to the track train inspection field, concretely relates to a detection device for wheel tread defect detection. BACKGROUND

[0002] After long time operation of track train, wheel tread will appear wear and tear even produce defect, and the defect reaches certain equivalent and will cause great influence to vehicle operation and bring safety hidden danger. Therefore, it is necessary to carry out online detection to train wheel, understand train state change, carry out data collection to wheel when train passes through detection shed, then know wheel state through data analysis, and wheel online detection has very important significance in guaranteeing locomotive safe operation.

[0003] For the detection of wheel tread defect of wheel set, the existing detection device usually realizes the collection of wheel tread image through area array camera, and the shooting object needs to be separately lighted, therefore, the position and direction of light supplement are also required to be relatively strict, and meanwhile, the light supplement cannot be overexposed or too dark, therefore, the shooting angle of area array camera and the angle, distance and exposure of light supplement need to be adjusted according to different detection environment.

[0004] The existing detection device for wheel tread defect detection cannot or is inconvenient to adjust the angle and position, so that the collected image is greatly disturbed by light, part of the image is distorted, and the difficulty of subsequent processing is increased. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a detection device for wheel tread defect detection, which can adjust the angle and position of image collection and improve the quality of collected image.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A detection device for wheel tread defect detection, comprising mounting base, sliding base, support base, rotating base and image collection device arranged in sequence from bottom to top; the sliding base is slidingly connected to the mounting base; the support base is hingedly connected to the sliding base; the rotating base is rotatably connected to the support base; and the image collection device is installed on the rotating base.

[0008] In some optional embodiments, a hinge part is arranged between the support base and the sliding base; the lower end of the hinge part is hingedly connected to the sliding base, and the upper end is hingedly connected to the support base.

[0009] In some optional embodiments, an elastic reset part is further arranged between the support base and the sliding base.

[0010] In some alternative embodiments, one of the rotating base and the supporting base is provided with an arc-shaped through slot, and the other is connected with a second connecting member which is capable of freely sliding in the arc-shaped through slot.

[0011] In some alternative embodiments, one of the rotating base and the supporting base is provided with an arc-shaped through slot, and the other is connected with a second connecting member which is capable of freely sliding in the arc-shaped through slot.

[0012] In some alternative embodiments, the gear is connected with an adjusting knob.

[0013] In some alternative embodiments, one of the rotating base and the supporting base is provided with an angle mark, and the other is provided with an indicating mark which is matched with the angle mark.

[0014] In some alternative embodiments, one of the rotating base and the supporting base is provided with an arc-shaped through slot, and the other is connected with a second connecting member which is capable of freely sliding in the arc-shaped through slot.

[0015] In some alternative embodiments, the mounting base is further connected with a guide limiting member, and the side edge of the sliding base is abutted with the guide limiting member, and the guide direction of the guide limiting member is parallel to the length direction of the sliding slot.

[0016] In some alternative embodiments, the image acquisition device comprises a linear array camera.

[0017] In summary, compared with the prior art, the present application has the following advantages and beneficial effects: the position of the image acquisition device along the length direction of the track can be adjusted through the sliding base, the height and the deflection angle of the image acquisition device can be adjusted through the supporting base, and the angle of the image acquisition device can be adjusted through the rotating base, so that the image acquisition direction of the image acquisition device can adapt to various detection environments, and thus a higher quality wheel tread defect image can be acquired. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a structural schematic diagram of the present application.

[0019] Figure 2 Fig. 2 is a structural schematic diagram of the present application.

[0020] Figure 3 Fig. 3 mainly shows the cooperation relationship between the gear and the rack in the present application.

[0021] The meanings of the numbers in the figure are: detection device 1, mounting base 11, sliding base 12, slide groove 13, first connecting member 14, guide limit member 15, hinge member 16, elastic reset member 17, support base 18, adjustment knob 19, gear 20, support 21, arc-shaped rack 22, angle mark 23, rotating base 24, arc-shaped through groove 25, second connecting member 26, mounting bracket 27, image acquisition device 28, track 2, wheelset 3, proximity sensor 4. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of this utility model, "several" means one or more, "more" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of terms such as "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] like Figure 2 As shown, the detection device for wheel tread defect detection described in the embodiment of the present application includes a mounting base 11, a sliding base 12, a supporting base 18, a rotating base 24 and an image acquisition device 28 arranged in sequence from bottom to top. Figure 2 The spatial rectangular coordinate system shown in is used to explain the relevant structure of the embodiment of the present application, wherein the direction indicated by the X-axis is the front, the direction indicated by the Y-axis is the left, and the direction indicated by the Z-axis is the top. In the embodiment of the present application, the direction of the X-axis is set to be parallel to the length direction of the track 2.

[0027] The mounting base 11 mainly serves as the mounting foundation of the entire detection device 1 and can be fixedly mounted on a reference surface such as the ground.

[0028] The sliding base 12 is slidably connected to the mounting base 11. Figure 2 As shown, the sliding base 12 can slide back and forth along the X-axis direction on the mounting base 11 to change its position.

[0029] The support base 18 is hinged to the sliding base 12, so that the support base 18 can be height-adjusted in the Z-axis direction relative to the sliding base 12. At the same time, the support base 18 can also be deflected relative to the sliding base 12, so that the plane where the support base 18 is located has a certain angle with the XY plane, thereby adjusting the angle of the support base 18.

[0030] The rotating base 24 is rotatably connected to the supporting base 18. Figure 2 As shown, the rotating base 24 can rotate around the Z axis relative to the supporting base 18 to change the angle.

[0031] An image acquisition device 28 for acquiring wheel tread defect images is installed on the rotating base 24 .

[0032] like Figure 1 As shown, the inspection device 1 described in the embodiment of the present application can be installed next to the track 2, generally on the outside of the track 2, and the mounting base 11 can be fixed to the ground using fasteners such as bolts. In the embodiment of the present application, the position of the image acquisition device 28 along the length of the track 2 can be adjusted using the sliding base 12, the height and deflection angle of the image acquisition device 28 can be adjusted using the support base 18, and the angle of the image acquisition device 28 can be adjusted using the rotating base 24. This allows the image acquisition direction of the image acquisition device 28 to adapt to various inspection environments, thereby enabling the acquisition of higher-quality wheel tread defect images.

[0033] As an optional embodiment of realizing that the sliding base 12 can slide relative to the mounting base 11, as Figure 2 As shown, an elongated slot 13 can be provided on one of the mounting base 11 and the sliding base 12, and a first connecting member 14 that can slide freely within the slot 13 can be connected to the other. For example, an elongated slot 13 is provided on the sliding base 12. In this embodiment of the present application, the length direction of the slot 13 is set to be parallel to the X-axis direction. The first connecting member 14 can be a bolt that passes through the slot 13 and is screwed into a pre-set threaded hole on the mounting base 11, thereby enabling the sliding base 12 to reciprocate relative to the mounting base 11 along the X-axis direction. Multiple slots 13 and first connecting members 14 can be provided on the mounting base 11 and the sliding base 12 to enhance the stability of the sliding motion. These slots 13 are all arranged parallel to each other.

[0034] In addition, a guide limiting member 15 can be connected to the mounting base 11. The guide limiting member 15 can be a long strip-shaped object with high straightness, such as a channel steel, and can be connected to the mounting base 11 by fasteners such as bolts. One side edge of the sliding base 12 abuts against the guide limiting member 15, and the guide direction of the guide limiting member 15 is parallel to the length direction of the sliding groove 13, i.e., parallel to the X-axis direction. The guide limiting member 15 can provide a guide function for the sliding base 12 to avoid sliding in other directions during sliding.

[0035] As an optional implementation form for adjusting the height and deflection angle of the support base 18 relative to the sliding base 12, as shown in Figure 2 A plurality of hinge members 16 can be arranged between the support base 18 and the sliding base 12. The lower end of the hinge member 16 is hingedly connected to the sliding base 12, and the upper end of the hinge member 16 is hingedly connected to the support base 18.

[0036] The hinge member 16 can be, for example, a rod end joint bearing. One end of the rod end joint bearing is a joint bearing, and the other end is a threaded rod. An installation hole can be formed in the sliding base 12, and the joint bearing can be installed inside. A through hole can be formed in the support base 18 for the threaded rod to pass through, and nuts are connected to the upper and lower sides of the support base 18. It should be noted that the size of the through hole should be larger than the diameter of the threaded rod. If the number of hinge members 16 is more than two, the hinge members 16 are preferably arranged in parallel with each other, so that the hinge members 16 can act synchronously and coordinately.

[0037] As a more preferred embodiment, the number of hinge members 16 can be three, and two of them are arranged on the left side and the right side along the Y-axis direction, and the other hinge member 16 is arranged on the front side or the rear side along the X-axis direction. By using three hinge members 16, the height and deflection angle of the support base 18 can be adjusted more conveniently and efficiently.

[0038] For example, if the height needs to be adjusted, all the hinge members 16 can be loosened, i.e., the nuts on the upper and lower sides of the support base 18 are loosened, and then the support base 18 is lifted or lowered to the target height. After that, the hinge members 16 are tightened, i.e., the nuts on the upper and lower sides of the support base 18 are tightened, and the height adjustment of the support base 18 is completed.

[0039] If the deflection angle is to be adjusted, the adjustment modes are various, here several adjustment modes are emphasized. If the support base 18 is to be deflected along the X axis, the hinge 16 arranged on the front side or the rear side along the X axis direction is kept fixed or slightly loosened, then the two hinges 16 arranged along the Y axis direction are loosened, after that, the left side of the support base 18 can be lowered, the right side is raised, or the left side of the support base 18 is raised, the right side is lowered, after the deflection angle is adjusted to the position, all the bolts are tightened. If the support base 18 is to be deflected along the Y axis, the two hinges 16 arranged along the Y axis direction are kept fixed or slightly loosened, then the hinge 16 arranged on the front side or the rear side along the X axis direction is loosened, after that, the front side of the support base 18 can be lowered, the rear side is raised, or the front side of the support base 18 is raised, the rear side is lowered, after the deflection angle is adjusted to the position, all the bolts are tightened. If the deflection angle is to be adjusted, all the hinges 16 can be loosened, after the support base 18 is deflected to the position, all the hinges 16 are tightened.

[0040] In addition, the height adjustment through the hinge 16 is limited, mainly used for fine adjustment of the height. Therefore, in order to realize large range adjustment of the image acquisition device 28 in the height direction, a mounting bracket 27 can be further vertically installed on the rotating base 24, the image acquisition device 28 can be installed at any position or some preset fixed positions on the mounting bracket 27, thereby facilitating large range adjustment of the height position of the image acquisition device 28.

[0041] When the height is adjusted, the support base 18 can rely on gravity to fall to realize lowering, in order to facilitate raising of the support base 18, as shown in Figure 2 The elastic reset members 17, for example, can be springs or elastic rubbers, are always compressed to have a pushing force, and can push the support base 18 to move upward. If the elastic reset members 17 are provided in plurality, the plurality of elastic reset members 17 are preferably evenly and dispersedly arranged between the support base 18 and the sliding base 12. The elastic reset members 17 and the support base 18 and the sliding base 12 can be connected in a hinged manner, or can be connected in a manner such as bonding, clamping and the like.

[0042] As an optional implementation form of realizing the rotating movement of the rotating base 24 relative to the support base 18, as shown in Figure 2As shown, one of the rotating base 24 and the support base 18 can be provided with an arcuate slot 25, and the other can be connected to a second connecting member 26 that can slide freely within the arcuate slot 25. For example, the rotating base 24 can be provided with an arcuate slot 25, and the second connecting member 26 can be a fastener such as a bolt that passes through the arcuate slot 25 and is screwed into a pre-set threaded hole in the support base 18. The center of the circle corresponding to the arcuate slot 25 coincides with the center of rotation of the rotating base 24 relative to the support base 18. Alternatively, a protrusion can be provided on one of the rotating base 24 and a recessed portion can be provided on the other at the rotation center to enhance stability during relative rotation between the two. Multiple arcuate slots 25 and second connecting member 26 can be provided, and the multiple arcuate slots 25 can be located on the same circumference or on different circumferences, but all arcuate slots 25 should have the same center.

[0043] The rotation of the rotating base 24 relative to the supporting base 18 can be adjusted manually, such as Figure 2 and Figure 3 As shown, an adjustment mechanism can also be provided between the rotating base 24 and the support base 18 to achieve rotational adjustment. This adjustment mechanism can include a meshing gear and rack. The gear 20 can be rotatably connected to one of the support base 18 and the rotating base 24, while the arcuate rack 22 is provided on the other. For example, the gear 20 can be rotatably connected to the support base 18, and the arcuate rack 22 can be connected to the rotating base 24, or a portion of the edge of the rotating base 24 can be machined into a rack shape. The center of the circle corresponding to the arcuate rack 22 coincides with the center of rotation of the rotating base 24 relative to the support base 18. The arcuate rack 22 can be provided on the upper surface of the rotating base 24, with the gear 20 mounted on the upper surface of the support base 18. The arcuate rack 22 can also be provided on the lower surface of the rotating base 24, with the gear 20 mounted on the lower surface of the support base 18. However, in this case, a groove must be provided in the support base 18 for the arcuate rack 22 to protrude. The connection stability of the gear 20 can be enhanced by a support 21 similar to an "Ω". Multiple sets of arcuate racks 22 and gears 20 can be provided. Similar to the arcuate slots 25, the multiple arcuate racks 22 can be located on the same circumference or on different circumferences, but these arcuate racks 22 should have the same center.

[0044] It is preferred to set the radius of the gear 20 to be smaller than the radius corresponding to the arc-shaped rack 22. In this way, it will be more labor-saving when driving the arc-shaped rack 22 through the gear 20, and the adjustment of the angle of the rotating base 24 can also be more precise.

[0045] Although the gear 20 can be manually adjusted, an adjustment knob 19 can be connected to the gear 20 for easier adjustment.

[0046] To more accurately show the angle of rotation of the rotating base 24 relative to the supporting base 18, an angle mark 23 can be provided on one of the rotating base 24 and the supporting base 18, and a corresponding indication mark can be provided on the other one. For example, the angle mark 23 can be provided on the upper surface of the supporting base 18, and the indication mark can be provided on the upper surface of the rotating base 24. The indication mark can be an arrow, a straight line, or a dot, a protrusion, a recess, or any other easily recognizable mark or structure.

[0047] As described in the background section, the existing detection device for wheel tread defects of a wheel set 3 usually uses a face array camera to capture the wheel tread image. The face array camera realizes pixel matrix shooting. When the face array camera captures an image, the image details are not determined by the number of pixels, but by the resolution, which is determined by the selected lens focal length. For the same camera, the resolution is different when different focal length lenses are selected. Although the face array camera can obtain two-dimensional image information such as area, shape, size, and position, and the measurement image is intuitive, due to the constraints of production technology, the area of a single face array is difficult to meet the accuracy requirements of general industrial measurement sites.

[0048] The line array camera has high resolution and low price, and can meet the accuracy requirements of most measurement sites. The image captured by the line array camera is in the form of a "line". Although it is also a two-dimensional image, it is extremely long, with several thousand pixels in length and only a few pixels in width.

[0049] Therefore, the detection device 1 described in the embodiments of the present application can also use an image capturing device 28 including a line array camera, for example, a laser three-dimensional profile measuring instrument produced by Shenzhen Smart Vision Technology Co., Ltd., model SR71600.

[0050] In addition, if a very large field of view or very high accuracy is required, the line array camera needs to be excited multiple times by an excitation device to take multiple photos, and then the multiple "strip" images taken are combined into one large image. Figure 1As shown, the proximity sensor 4 can be used as the excitation device, the proximity sensor 4 can be installed on the track 2, and a plurality of proximity sensors 4 can be installed in sequence along the length direction of the track 2 to detect the wheels of the wheel set 3, when the wheels pass through the track 2, they will be detected in sequence by the plurality of proximity sensors 4, which will send signals to the image acquisition device 28, so that the linear array camera of the image acquisition device 28 takes images of the tread of the wheels, which can be one signal of the proximity sensor 4 to make the image acquisition device 28 take an image, or one signal of the proximity sensor 4 to make the image acquisition device 28 take multiple images.

[0051] A plurality of detection devices 1 can also be installed in sequence along the track 2, for example, four detection devices and twelve proximity sensors 4, the first to third proximity sensors 4 can be used as the excitation device of the first detection device 1, the fourth to sixth proximity sensors 4 can be used as the excitation device of the second detection device 1, and so on, so that each detection device 1 corresponds to three proximity sensors 4 as the excitation device. The plurality of detection devices 1 can respectively collect images of different positions and angles of the tread of the wheels, thereby facilitating the synthesis of subsequent images and improving the detection precision and accuracy.

[0052] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0053] The above preferred embodiments should not be regarded as a limitation of the present application, and the protection scope of the present application should be defined by the scope of the claims. For those skilled in the art, some improvements and refinements can be made without departing from the spirit and scope of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A detection device for wheel tread defect detection, characterized in that: It comprises a mounting base (11), a sliding base (12), a supporting base (18), a rotating base (24) and an image acquisition device (28) which are arranged in sequence from bottom to top; The sliding base (12) is slidably connected to the mounting base (11); The support base (18) is hinged to the sliding base (12); The rotating base (24) is rotatably connected to the supporting base (18); The image acquisition device (28) is installed on the rotating base (24).

2. The detection device for wheel tread defect detection according to claim 1, characterized in that: A hinge (16) is provided between the support base (18) and the sliding base (12); The lower end of the hinged member (16) is hinged to the sliding base (12), and the upper end is hinged to the supporting base (18).

3. The detection device for wheel tread defect detection according to claim 2, characterized in that: An elastic reset member (17) is further provided between the support base (18) and the sliding base (12).

4. The detection device for wheel tread defect detection according to claim 1, characterized in that: One of the rotating base (24) and the supporting base (18) is provided with an arc-shaped through groove (25), and the other is connected with a second connecting member (26) that can slide freely in the arc-shaped through groove (25).

5. The detection device for wheel tread defect detection according to claim 4, characterized in that: One of the support base (18) and the rotating base (24) is rotatably connected to a gear (20), and the other is provided with an arc-shaped rack (22) meshing with the gear (20).

6. The detection device for wheel tread defect detection according to claim 5, characterized in that: The gear (20) is connected to an adjustment knob (19).

7. The detection device for wheel tread defect detection according to claim 1, characterized in that: One of the rotating base (24) and the supporting base (18) is provided with an angle mark (23), and the other is provided with an indication mark used in conjunction with the angle mark (23).

8. The detection device for wheel tread defect detection according to claim 1, characterized in that: One of the mounting base (11) and the sliding base (12) is provided with a long strip-shaped sliding groove (13), and the other is connected with a first connecting member (14) that can slide freely in the sliding groove (13).

9. The detection device for wheel tread defect detection according to claim 8, characterized in that: The mounting base (11) is also connected to a guide limiter (15); a side edge of the sliding base (12) abuts against the guide limiter (15), and the guide direction of the guide limiter (15) is parallel to the length direction of the slide groove (13).

10. The detection device for wheel tread defect detection according to claim 1, characterized in that: The image acquisition device (28) includes a line array camera.

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