Quality scanning system

Abstract

The utility model discloses a quality scanning system, and relates to the technical field of visual inspection, the quality scanning system comprises a scanning device, the scanning device comprises a light receiver, a first laser and a second laser; a detection area is arranged on one side of the light receiver, and the light receiver is arranged towards the detection area; the first laser and the second laser are respectively arranged on two opposite sides of the detection area, and the first laser is used for emitting a plurality of parallel light rays extending along a first direction; the second laser is used for emitting a plurality of parallel light rays extending along a second direction; wherein the first direction is intersected with the second direction, so that crossed light rays are formed in the detection area. According to the technical scheme provided by the utility model, the laser emitted by the first laser and the second laser forms the laser net surface on the surface of the detected object, so that three-dimensional characteristics in the area can be directly obtained, the process of repeatedly scanning the surface of the object is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection technology, and in particular to a quality scanning system. Background Technology

[0002] Surface defect detection of welds mainly involves inspecting the surface of the welded joint to ensure that the welding quality meets the standard requirements.

[0003] In existing technologies, the quality inspection of pipe welding positions uses a single-line laser to scan the welding position. A single-line laser irradiates the surface of an object as a single laser line, which can only obtain two-dimensional features of one location on the surface of the object. It cannot immediately obtain the three-dimensional features of the surface of the object. Only after repeated translation between the laser and the object can the three-dimensional features of the surface of the object be fitted.

[0004] Single-line laser scanning has the problem of low efficiency in acquiring three-dimensional features of the object surface, resulting in a long detection time. Utility Model Content

[0005] The main objective of this invention is to propose a quality scanning system that aims to improve the efficiency of acquiring three-dimensional features of an object's surface and shorten the time required for the detection process.

[0006] To achieve the above objectives, this utility model proposes a quality scanning system including a scanning device, which comprises: a light receiver, a first laser, and a second laser; a detection area is provided on one side of the light receiver, and the light receiver is positioned facing the detection area; the first laser and the second laser are respectively disposed on opposite sides of the detection area, the first laser being used to emit multiple parallel light rays extending along a first direction; the second laser being used to emit multiple parallel light rays extending along a second direction; wherein the first direction and the second direction intersect to form intersecting light rays within the detection area.

[0007] In one embodiment, the scanning device further includes:

[0008] A first adjustment mirror is rotatably positioned between the first laser and the detection area to receive parallel light emitted by the first laser and reflect it onto the detection area.

[0009] The second adjustment mirror is rotatably positioned between the second laser and the detection area to receive parallel light emitted by the second laser and reflect it onto the detection area.

[0010] The first and second adjustment mirrors are arranged in opposite directions of rotation.

[0011] In one embodiment, the scanning device further includes an adjustment mechanism, the adjustment mechanism comprising:

[0012] A first bevel gear, a second bevel gear, and a third bevel gear, wherein the first bevel gear and the second bevel gear are respectively disposed on both sides of the third bevel gear in the radial direction and respectively mesh with the third bevel gear;

[0013] The motor is adjusted and drivenly connected to one of the first bevel gear, the second bevel gear, and the third bevel gear;

[0014] The first bevel gear is connected to the first adjusting mirror via a transmission connection, and the second bevel gear is connected to the second adjusting mirror via a transmission connection. The first bevel gear and the second bevel gear have the same number of teeth.

[0015] In one embodiment, the adjusting mechanism further includes:

[0016] The first sprocket assembly has a first driving sprocket and a first driven sprocket, the first driving sprocket and the first driven sprocket are connected by a chain drive, and the first driven sprocket is fixedly connected to the first adjusting mirror.

[0017] The first connecting rod is fixedly connected at one end to the first bevel gear and at the other end to the first drive wheel.

[0018] In one embodiment, the adjusting mechanism further includes:

[0019] The second sprocket assembly has a second driving sprocket and a second driven sprocket, with chain drive between the second driving sprocket and the second driven sprocket, and the second driven sprocket is fixedly connected to the second adjusting mirror.

[0020] The second connecting rod passes through the first bevel gear, the first connecting rod, and the first drive wheel, respectively. One end of the second connecting rod is fixedly connected to the second bevel gear, and the other end is fixedly connected to the second drive wheel.

[0021] In one embodiment, the scanning device has a mounting housing, in which the light receiver, the first laser, the second laser, and the adjustment mechanism are mounted;

[0022] The quality scanning system further includes a motion mechanism, which includes a mounting frame, and the mounting housing is movably mounted on the mounting frame along a third direction.

[0023] In one embodiment, the mounting bracket has a lead screw and a guide rod extending in a third direction. The lead screw is rotatably disposed along a third-direction axis, passes through the mounting housing and is threadedly connected to the mounting housing, and the guide rod passes through the mounting housing.

[0024] The motion mechanism further includes a first drive motor, which is mounted on the mounting bracket and driven by the lead screw.

[0025] In one embodiment, the motion mechanism includes two toothed rings that are disposed through the third direction and are disposed opposite to each other in the third direction. The mounting bracket is mounted on the toothed rings and is movably disposed along the extension direction of the toothed rings.

[0026] In one embodiment, the motion mechanism further includes:

[0027] A drive wheel is rotatably mounted on the end of the mounting bracket along a third directional axis and engages with the gear ring;

[0028] An auxiliary wheel is rotatably mounted on the end of the mounting bracket along a third directional axis, spaced apart from the drive wheel, and used to clamp the toothed ring together with the drive wheel;

[0029] The second drive motor is mounted on the mounting bracket and is driven by the drive wheel.

[0030] In one embodiment, the auxiliary wheel is provided with a groove in the circumferential direction, and the inner ring of the toothed ring is at least partially engaged within the groove; and / or,

[0031] A plurality of auxiliary wheels are provided at one end of the mounting bracket.

[0032] The technical solution of this utility model uses lasers emitted by the first laser and the second laser to form a laser mesh on the surface of the object being detected, which can directly obtain the three-dimensional features in the area, reduce the process of repeatedly scanning the object surface, and improve detection efficiency. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 A schematic diagram of an embodiment of the quality scanning system provided by this utility model;

[0035] Figure 2 for Figure 1 A partial schematic diagram of the scanning device;

[0036] Figure 3 for Figure 1 A schematic diagram of the adjustment mechanism of the intermediate scanning device;

[0037] Figure 4 for Figure 1 A schematic diagram of the motion mechanism.

[0038] Explanation of icon numbers:

[0039] 100. Quality scanning system; 1. Scanning device; 11. Light receiver; 12. First laser; 13. Second laser; 14. Adjustment mechanism; 141. First bevel gear; 142. Second bevel gear; 143. Third bevel gear; 144. Adjustment motor; 145. First sprocket assembly; 1451. First drive wheel; 1452. First driven wheel; 146. First connecting rod; 147. Second sprocket assembly; 1471. Second drive wheel; 1472. Second driven wheel; 148. Second connecting rod; 15. Mounting housing; 16. First adjusting mirror; 17. Second adjusting mirror; 2. Motion mechanism; 21. Mounting bracket; 211. Lead screw; 212. Guide rod; 22. First drive motor; 23. Gear ring; 24. Drive wheel; 25. Auxiliary wheel; 26. Second drive motor.

[0040] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0042] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0044] In existing technologies, the quality inspection of pipe weld locations uses single-line laser scanning. Since a single laser beam illuminates the surface of an object as a single line, it can only obtain two-dimensional features at one location. It cannot immediately acquire three-dimensional features; only through repeated translational movements between the laser and the object can the three-dimensional features be fitted. Single-line laser scanning suffers from low efficiency in acquiring three-dimensional features, resulting in a long inspection time.

[0045] This invention proposes a quality scanning system.

[0046] Please see Figure 1 In one embodiment of this utility model, the quality scanning system 100 includes a scanning device 1, which includes a light receiver 11, a first laser 12, and a second laser 13. A detection area is provided on one side of the light receiver 11, and the light receiver 11 is disposed facing the detection area. The first laser 12 and the second laser 13 are respectively disposed on opposite sides of the detection area. The first laser 12 is used to emit multiple parallel light rays extending along a first direction. The second laser 13 is used to emit multiple parallel light rays extending along a second direction. The first direction and the second direction are intersecting to form intersecting light rays within the detection area.

[0047] The technical solution of this utility model employs a first laser 12 and a second laser 13 to emit multiple parallel light rays into the detection area. The parallel light rays emitted by the first laser 12 extend along a first direction, and the parallel light rays emitted by the second laser 13 extend along a second direction. The first and second directions intersect, so the parallel light rays emitted by the first laser 12 and the second laser 13 intersect within the detection area, forming a grid-like laser beam. The light receiver 11 is positioned towards the detection area to receive the reflected laser light, which is used to calculate the three-dimensional features of the object's surface. Since the grid-like laser beam can cover the object's surface, the object's surface can be detected without relative movement between the scanning device 1 and the object. Compared to using a single-line laser, the detection method of arranging intersecting lasers is more efficient. However, since the detection area of ​​the mass scanning system 100 is limited, when detecting larger object surfaces, it is still necessary to move the scanning device 1 or the object to perform a comprehensive detection of the object's surface.

[0048] When an object's surface has deep holes or narrow areas, single-line laser scanning requires multiple angle adjustments and repeated scans. Cross-laser scanning, however, can directly cover blind spots through multi-line superposition. Therefore, the cross-laser scanning method of this quality scanning system 100 is more efficient. Since single-line lasers only generate two-dimensional planar data and cannot directly acquire height information, they rely on multi-device combinations or motion trajectory compensation, which can easily lead to data loss or splicing errors. The multi-line layout of cross-lasers, combined with optical triangulation, can capture multi-dimensional spatial information in one scan, avoiding the cumulative errors of multiple scans. Therefore, the cross-laser scanning method of this quality scanning system 100 provides better scanning quality and thus better detection of object surfaces.

[0049] When inspecting the surface of multiple pipes, the distance between the scanning device 1 and the pipe axis remains constant to facilitate the calculation of pipe surface features. However, the diameters of different pipes may be different, so the distances between the first laser 12 and the second laser 13 and the pipe surface are also different. Therefore, the distances from the detection area to the first laser 12 and the second laser 13 are also different. In order to enable the first laser 12 and the second laser 13 to fall into the detection area at different positions, cross lasers are formed in the detection area. Therefore, the propagation path of the laser needs to be adjusted. Thus, the scanning device 1 is also provided with a first adjusting mirror 16 and a second adjusting mirror 17. The first adjusting mirror 16 is rotatably disposed between the first laser 12 and the detection area, for receiving the parallel light emitted by the first laser 12 and reflecting it onto the detection area. The second adjusting mirror 17 is rotatably disposed between the second laser 13 and the detection area, for receiving the parallel light emitted by the second laser 13 and reflecting it onto the detection area. In order for the lasers emitted by the first laser 12 and the second laser 13 to be reflected onto the detection area simultaneously, the first adjusting mirror 16 and the second adjusting mirror 17 are arranged in opposite directions of rotation, and the deflection angles of the first adjusting mirror 16 and the second adjusting mirror 17 are the same.

[0050] Regarding the specific adjustment methods of the first adjusting mirror 16 and the second adjusting mirror 17, the scanning device 1 further includes an adjustment mechanism 14. The adjustment mechanism 14 includes a first bevel gear 141, a second bevel gear 142, and a third bevel gear 143, and an adjustment motor 144. The first bevel gear 141 and the second bevel gear 142 are respectively disposed on both radial sides of the third bevel gear 143 and mesh with it. Therefore, when observed from the same direction, the first bevel gear 141 and the second bevel gear 142 rotate in opposite directions. Thus, the first bevel gear 141 is drive-connected to the first adjusting mirror 16, and the second bevel gear 142 is drive-connected to the second adjusting mirror 17. The first bevel gear 141 and the second bevel gear 142 have the same number of teeth. When the second bevel gear 142 rotates, the first bevel gear 141 and the second bevel gear 142 rotate at the same angle, thereby causing the first adjusting mirror 16 and the second adjusting mirror 17 to rotate in opposite directions but at the same angle. The adjusting motor 144 is driven to one of the first bevel gear 141, the second bevel gear 142 and the third bevel gear 143; the number of pulses of the adjusting motor 144 can be used to precisely adjust the rotation angle of the first adjusting mirror 16 and the second adjusting mirror 17 and achieve automatic adjustment.

[0051] The first bevel gear 141 and the first adjusting mirror 16 are connected by a first sprocket assembly 145 and a first connecting rod 146. The adjusting mechanism 14 further includes a first sprocket assembly 145 and a first connecting rod 146. The first sprocket assembly 145 has a first driving wheel 1451 and a first driven wheel 1452. The first driving wheel 1451 and the first driven wheel 1452 are driven by a chain. The first driven wheel 1452 is fixedly connected to the first adjusting mirror 16. One end of the first connecting rod 146 is fixedly connected to the first bevel gear 141, and the other end is fixedly connected to the first driving wheel 1451. Similarly, the adjustment mechanism 14 also includes: a second sprocket assembly 147 and a second connecting rod 148. The second sprocket assembly 147 has a second driving wheel 1471 and a second driven wheel 1472, with chain drive between the second driving wheel 1471 and the second driven wheel 1472. The second driven wheel 1472 is fixedly connected to the second adjustment mirror 17. One end of the second connecting rod 148 is fixedly connected to the second bevel gear 142, and the other end is fixedly connected to the second driving wheel 1471. However, in order to make the first adjustment mirror 16 and the second adjustment mirror 17 located on the same side of the second bevel gear 142, and to be respectively corresponding to the first laser 12 and the second laser 13, the second connecting rod 148 needs to pass through the first bevel gear 141, the first connecting rod 146, and the first driving wheel 1451, so that the other end of the second connecting rod 148 extends to the other side of the second bevel gear 142 in the radial direction.

[0052] In long pipelines, a mobile scanning device 1 is still required to perform a complete scan of the pipeline. The scanning device 1 has a mounting housing 15, in which the light receiver 11, the first laser 12, the second laser 13, and the adjustment mechanism 14 are mounted. The quality scanning system 100 also includes a motion mechanism 2, which includes a mounting frame 21. The mounting housing 15 is movably mounted on the mounting frame 21 along a third direction (corresponding to the length direction of the pipeline). When the mounting housing 15 moves, it will drive the internal components such as the light receiver 11, the first laser 12, and the second laser 13 to move simultaneously.

[0053] The specific movement method is as follows: The mounting frame 21 has a lead screw 211 and a guide rod 212 extending in a third direction. The lead screw 211 is rotatably arranged along the third-direction axis, passes through the mounting housing 15, and is threadedly connected to the mounting housing 15. The guide rod 212 passes through the mounting housing 15. The motion mechanism 2 also includes a first drive motor 22, which is mounted on the mounting frame 21 and drivenly connected to the lead screw 211. After the drive motor is started, the lead screw 211 applies an external force to the mounting housing 15. The mounting housing 15 is limited by the guide rod 212 and cannot rotate, but can only move along the length direction of the lead screw 211. This allows the mounting housing 15 to move along the third direction on the mounting frame 21, thereby scanning various positions along the length direction of the pipeline.

[0054] Furthermore, during pipeline inspection, a complete circumferential scan of the pipeline is required, necessitating relative rotation of the scanning device 1 around the pipeline. In one embodiment, the motion mechanism 2 includes two fixedly arranged toothed rings 23, which are arranged through the pipeline in a third direction. The two toothed rings 23 are arranged opposite each other in the third direction, and the mounting bracket 21 is mounted on the toothed rings 23 and is movable along the extension direction of the toothed rings 23. By moving the scanning device 1 along the toothed rings 23, rotation around the pipeline can be achieved.

[0055] Specifically, the rotation mechanism 2 includes a drive wheel 24, an auxiliary wheel 25, and a second drive motor 26. The drive wheel 24 is rotatably mounted on the end of the mounting frame 21 along a third directional axis and engages with the gear ring 23. The auxiliary wheel 25 is rotatably mounted on the end of the mounting frame 21 along a third directional axis and is spaced apart from the drive wheel 24 to clamp the gear ring 23 together with the drive wheel 24, preventing the drive wheel 24 from disengaging from the gear ring 23. The second drive motor 26 is mounted on the mounting frame 21 and is driven by the drive wheel 24. When the drive wheel 24 rotates, it revolves around the circumference of the gear ring 23, thus moving the mounting frame 21 around the gear ring 23 and causing the scanning device 1 to rotate around the circumference of the pipe.

[0056] To prevent the toothed ring 23 from misaligning with the auxiliary wheel 25 and the drive wheel 24 in the third direction, thus causing it to detach, the auxiliary wheel 25 is provided with a groove in the circumference. At least part of the inner ring of the toothed ring 23 is engaged in the groove, preventing misalignment between the auxiliary wheel 25 and the toothed ring 23 in the third direction. Furthermore, to ensure the mounting bracket 21 is securely mounted on the toothed ring 23, multiple auxiliary wheels 25 are provided at one end of the mounting bracket 21. These multiple auxiliary wheels 25, together with a drive wheel 24, clamp the toothed ring 23. Each of the multiple auxiliary wheels 25 is also provided with a groove, which together engages the inner ring portion of the toothed ring 23, achieving a limited mounting.

[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A quality scanning system, characterized in that, Includes a scanning device, the scanning device comprising: A light receiver, wherein a detection area is provided on one side of the light receiver and the light receiver is positioned facing the detection area; A first laser and a second laser are respectively disposed on opposite sides of the detection area. The first laser is used to emit multiple parallel light rays extending along a first direction; the second laser is used to emit multiple parallel light rays extending along a second direction. The first direction and the second direction are arranged to intersect, so as to form intersecting light rays within the detection area.

2. The quality scanning system as described in claim 1, characterized in that, The scanning device further includes: A first adjustment mirror is rotatably positioned between the first laser and the detection area to receive parallel light emitted by the first laser and reflect it onto the detection area. The second adjustment mirror is rotatably positioned between the second laser and the detection area to receive parallel light emitted by the second laser and reflect it onto the detection area. The first and second adjustment mirrors are arranged in opposite directions of rotation.

3. The quality scanning system as described in claim 2, characterized in that, The scanning device further includes an adjustment mechanism, the adjustment mechanism comprising: A first bevel gear, a second bevel gear, and a third bevel gear, wherein the first bevel gear and the second bevel gear are respectively disposed on both sides of the third bevel gear in the radial direction and respectively mesh with the third bevel gear; The motor is adjusted and drivenly connected to one of the first bevel gear, the second bevel gear, and the third bevel gear; The first bevel gear is connected to the first adjusting mirror via a transmission connection, and the second bevel gear is connected to the second adjusting mirror via a transmission connection. The first bevel gear and the second bevel gear have the same number of teeth.

4. The quality scanning system as described in claim 3, characterized in that, The adjustment mechanism further includes: The first sprocket assembly has a first driving sprocket and a first driven sprocket, the first driving sprocket and the first driven sprocket are connected by a chain drive, and the first driven sprocket is fixedly connected to the first adjusting mirror. The first connecting rod is fixedly connected at one end to the first bevel gear and at the other end to the first drive wheel.

5. The quality scanning system as described in claim 4, characterized in that, The adjustment mechanism further includes: The second sprocket assembly has a second driving sprocket and a second driven sprocket, with chain drive between the second driving sprocket and the second driven sprocket, and the second driven sprocket is fixedly connected to the second adjusting mirror. The second connecting rod passes through the first bevel gear, the first connecting rod, and the first drive wheel, respectively. One end of the second connecting rod is fixedly connected to the second bevel gear, and the other end is fixedly connected to the second drive wheel.

6. The quality scanning system as described in claim 3, characterized in that, The scanning device has a mounting housing, and the light receiver, the first laser, the second laser, and the adjustment mechanism are mounted inside the mounting housing. The quality scanning system also includes a motion mechanism, which includes a mounting frame, and the mounting housing is movably mounted on the mounting frame along a third direction.

7. The quality scanning system as described in claim 6, characterized in that, The mounting bracket has a lead screw and a guide rod extending in a third direction. The lead screw is rotatably arranged along the third direction axis, passes through the mounting housing and is threadedly connected to the mounting housing, and the guide rod passes through the mounting housing. The motion mechanism further includes a first drive motor, which is mounted on the mounting bracket and driven by the lead screw.

8. The quality scanning system as described in claim 6, characterized in that, The motion mechanism includes two toothed rings, which are arranged through the third direction and opposite to each other in the third direction. The mounting bracket is mounted on the toothed rings and is movable along the extension direction of the toothed rings.

9. The quality scanning system as described in claim 8, characterized in that, The motion mechanism also includes: A drive wheel is rotatably mounted on the end of the mounting bracket along a third directional axis and engages with the gear ring; An auxiliary wheel is rotatably mounted on the end of the mounting bracket along a third directional axis, spaced apart from the drive wheel, and used to clamp the toothed ring together with the drive wheel; The second drive motor is mounted on the mounting bracket and is driven by the drive wheel.

10. The quality scanning system as described in claim 9, characterized in that, The auxiliary wheel is provided with a groove in its circumference, and the inner ring of the toothed ring is at least partially engaged in the groove; and / or, A plurality of auxiliary wheels are provided at one end of the mounting bracket.

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