Adaptively regulated laser scanning weld seam recognition device

Abstract

The utility model relates to welding quality detection technical field, concretely for adaptive regulation's laser scanning weld joint identification device, including the casing, still include: for carrying out scanning identification of weld joint's laser scanner, the laser scanner sets up in one side of casing, for carrying out image acquisition of weld joint's high speed camera, high speed camera fixedly connects on one side outer wall of casing, adjusting assembly, drives adjusting assembly work for expanding the scanning range of laser scanner through high speed camera to weld joint image and gathers, for carrying out the adjustment of laser scanner laser beam divergence angle and spot size's beam expanding component, the utility model discloses the linkage design of adjusting assembly and beam expanding component realizes the adaptive regulation of laser scanner scanning range.

Description

Technical Field

[0001] This utility model relates to the field of welding quality inspection technology, specifically to an adaptively adjustable laser scanning weld identification device. Background Technology

[0002] In modern industrial production, welding, as a crucial joining process, is widely used in numerous fields such as machinery manufacturing, automotive industry, and aerospace. The quality of the weld directly affects the safety, reliability, and service life of products. With the continuous improvement of industrial automation, higher demands are being placed on the accuracy, efficiency, and degree of automation in weld quality inspection.

[0003] Traditional weld inspection methods, such as visual inspection, ultrasonic inspection, and radiographic inspection, have certain limitations. Visual inspection relies on human experience, is highly subjective, and inefficient; ultrasonic and radiographic inspections require sophisticated equipment, involve complex processes, and are difficult to implement in real-time online operation. In contrast, weld identification methods based on laser scanning technology offer advantages such as non-contact operation, high precision, and high speed, and are gradually becoming a research hotspot in the field of weld inspection.

[0004] Currently, existing laser scanning weld seam recognition devices on the market still have some problems in practical applications. For example, some devices can only scan and recognize weld seams within a specific range. When the weld seam width exceeds the limit, they cannot accurately detect parameters such as the weld seam's position and width, and cannot achieve adaptive adjustment during the scanning and recognition process, resulting in a narrow range of applications. Therefore, there is an urgent need for an adaptive laser scanning weld seam recognition device to solve these problems. Summary of the Invention

[0005] In view of the shortcomings of the prior art mentioned in the background, the present invention provides an adaptive adjustment laser scanning weld seam recognition device.

[0006] This utility model overcomes the above technical problems by adopting the following technical solution:

[0007] An adaptive laser scanning weld seam identification device, including a housing, also includes:

[0008] A laser scanner for scanning and identifying weld seams, the laser scanner being disposed on one side of the housing;

[0009] A high-speed camera for acquiring images of weld seams, the high-speed camera being fixedly connected to one side of the outer wall of the housing;

[0010] An adjustment component is used to expand the scanning range of the laser scanner by acquiring weld seam images through a high-speed camera.

[0011] A beam expander assembly used to adjust the divergence angle and spot size of the laser beam from the laser scanner.

[0012] As a further embodiment of this utility model: the adjustment assembly includes a first housing fixedly connected to the inner wall of one side of the housing, a first motor fixedly connected to the outer wall of one side of the first housing, a first threaded screw fixedly connected to the output end of the first motor, a first threaded sleeve threadedly connected to the outer circumference of the first threaded screw, a sliding column fixedly connected to the outer wall of one side of the first threaded sleeve, and the end of the sliding column away from the first threaded sleeve fixedly connected to the laser scanner.

[0013] As a further improvement of this utility model: a through groove is provided on one side of the outer wall of the housing, and one end of the sliding column passes through the inside of the through groove.

[0014] As a further improvement of this utility model, a fixing base is fixedly connected to the side of the housing away from the laser scanner.

[0015] As a further embodiment of this utility model: the beam expander includes a fixed cylinder fixedly connected to one end of the laser scanner, and a fixed frame is provided inside the fixed cylinder. There are two sets of fixed frames, and a convex lens and a concave lens are fixedly connected inside the two sets of fixed frames respectively.

[0016] As a further improvement of this invention, the concave lens is positioned closer to the end of the laser scanner than the convex lens.

[0017] As a further embodiment of this utility model: a second housing is fixedly connected to the outer circumferential wall of the fixed cylinder, the second housing is connected to the fixed cylinder, and a displacement component for adjusting the distance between the convex lens and the concave lens is provided inside the second housing.

[0018] As a further embodiment of this utility model: the displacement component includes a second motor fixedly connected to the outer wall of one side of the second housing, a second threaded screw fixedly connected to the output end of the second motor, a second threaded sleeve threadedly connected to the outer circumference of the second threaded screw, a sliding plate fixedly connected to the outer circumference of the second threaded sleeve, and the sliding plate fixedly connected to the fixed frame.

[0019] As a further improvement of this utility model: the outer walls on both sides of the skateboard are in contact with the inner walls on both sides of the second box.

[0020] As a further improvement of this utility model: a controller is fixedly connected to one inner wall of the housing, and the controller is electrically connected to the laser scanner, the high-speed camera, the first motor and the second motor.

[0021] With the above structure, this utility model has the following advantages compared with the prior art: In this utility model, the adaptive adjustment of the scanning range of the laser scanner is achieved through the linkage design of the adjustment component and the beam expander component. When the high-speed camera detects that the weld seam exceeds the current scanning range, the controller drives the first motor, threaded screw and sliding column structure of the adjustment component to push the laser scanner to translate and expand the physical scanning coverage. At the same time, the controller controls the second motor of the beam expander component to adjust the distance between the convex lens and the concave lens, changing the divergence angle and spot size of the laser beam (increasing the spot coverage for wide weld seams and reducing the spot focus for narrow weld seams). Combined with the high-speed camera image and the closed-loop control of the controller, dynamic calibration of "detection-analysis-adjustment" is achieved, so that the device can cover weld seams of different sizes through mechanical movement and optimize the scanning accuracy through optical parameter adjustment, effectively improving the detection capability and efficiency of wide and complex weld seams, and reducing detection blind spots and mechanical errors. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall front structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the overall rear structure of this utility model.

[0024] Figure 3 This is a cross-sectional view of the internal structure of the shell of this utility model.

[0025] Figure 4 This is a side view of the present invention.

[0026] Figure 5 This is a partial cross-sectional view of the beam expander component of this utility model.

[0027] Figure 6 This utility model Figure 5 A magnified structural diagram of point A in the middle.

[0028] In the diagram: 1. Housing; 2. Laser scanner; 3. High-speed camera; 4. Adjustment assembly; 4001. First housing; 4002. Through slot; 4003. First threaded sleeve; 4004. First threaded screw; 4005. First motor; 4006. Sliding column; 5. Beam expander assembly; 5001. Fixing cylinder; 5002. Second housing; 5003. Second motor; 5004. Slide plate; 5005. Second threaded sleeve; 5006. Second threaded screw; 5007. Fixing frame; 5008. Convex lens; 5009. Concave lens; 6. Fixing base; 7. Controller. Detailed Implementation

[0029] 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 protection scope of the present utility model.

[0030] Please see Figures 1-6 In this embodiment of the invention, the adaptively adjustable laser scanning weld seam identification device includes a housing 1, and further includes:

[0031] A laser scanner 2 is used to scan and identify weld seams, and the laser scanner 2 is disposed on one side of the housing 1;

[0032] A high-speed camera 3 is used to acquire images of the weld seam. The high-speed camera 3 is fixedly connected to one side of the outer wall of the housing 1.

[0033] Adjustment component 4 is driven by high-speed camera 3 to acquire weld seam images, thereby expanding the scanning range of laser scanner 2;

[0034] Beam expander 5 is used to adjust the divergence angle and spot size of the laser beam of laser scanner 2.

[0035] Preferably, the adjustment assembly 4 includes a first housing 4001 fixedly connected to the inner wall of one side of the housing 1, a first motor 4005 fixedly connected to the outer wall of one side of the first housing 4001, a first threaded screw 4004 fixedly connected to the output end of the first motor 4005, a first threaded sleeve 4003 threadedly connected to the outer circumference of the first threaded screw 4004, a sliding column 4006 fixedly connected to the outer wall of one side of the first threaded sleeve 4003, and the end of the sliding column 4006 away from the first threaded sleeve 4003 fixedly connected to the laser scanner 2.

[0036] Preferably, a through groove 4002 is provided on one side of the outer wall of the housing 1. One end of the sliding column 4006 passes through the inside of the through groove 4002. The first motor 4005 in the adjusting assembly 4 starts to operate, and its output end drives the first threaded screw 4004 to rotate. Since the first threaded screw 4004 and the first threaded sleeve 4003 are threadedly connected, when the first threaded screw 4004 rotates, the first threaded sleeve 4003 will move linearly along the axis of the screw. The sliding column 4006 fixed on one side of the outer wall of the first threaded sleeve 4003 will move synchronously with the sleeve. The other end of the sliding column 4006 is fixedly connected to the laser scanner 2. Therefore, the movement of the sliding column 4006 can drive the laser scanner 2 to adjust its position, thereby expanding the scanning range of the laser scanner 2 and ensuring that the entire weld can be effectively covered, realizing adaptive adjustment of weld scanning and recognition.

[0037] Preferably, a mounting base 6 is fixedly connected to the side of the housing 1 away from the laser scanner 2, which facilitates fixed connection with an external robotic arm to realize automatic scanning and recognition of weld seams.

[0038] Preferably, the beam expander 5 includes a fixed cylinder 5001 fixedly connected to one end of the laser scanner 2. The fixed cylinder 5001 has a fixed frame 5007 inside. There are two sets of fixed frames 5007. A convex lens 5008 and a concave lens 5009 are fixedly connected inside the two sets of fixed frames 5007, respectively. For wider welds, the beam expander 5 can be used to increase the spot size to ensure that the entire weld can be effectively irradiated and scanned by the laser. For situations requiring higher resolution, the spot size can be reduced by adjusting the beam expansion ratio to improve the energy density and scanning accuracy of the laser beam, thus meeting people's needs for scanning and identifying different welds.

[0039] Preferably, the concave lens 5009 is closer to the end of the laser scanner 2 than the convex lens 5008.

[0040] Preferably, a second housing 5002 is fixedly connected to the outer circumferential wall of the fixed cylinder 5001. The second housing 5002 is connected to the fixed cylinder 5001. The interior of the second housing 5002 is provided with a displacement component for adjusting the distance between the convex lens 5008 and the concave lens 5009. By changing the distance between the two lenses, the divergence angle and spot size of the laser beam can be flexibly adjusted.

[0041] Preferably, the displacement assembly includes a second motor 5003 fixedly connected to the outer wall of one side of the second housing 5002. A second threaded screw 5006 is fixedly connected to the output end of the second motor 5003. A second threaded sleeve 5005 is threadedly connected to the outer circumference of the second threaded screw 5006. A sliding plate 5004 is fixedly connected to the outer circumference of the second threaded sleeve 5005. The sliding plate 5004 is fixedly connected to the fixed frame 5007. The second threaded screw 5006 is rotated by the output end of the second motor 5003. The second threaded screw 5006 is threadedly engaged with the second threaded sleeve 5005. When the screw rotates, the second threaded sleeve 5005 will be displaced along the screw. The outer circumference of the second threaded sleeve 5005 is fixedly connected to the slide plate 5004, which is connected to the fixed frame 5007. The fixed frame 5007 is equipped with a convex lens 5008 and a concave lens 5009 respectively. Therefore, as the slide plate 5004 moves, the distance between the convex lens 5008 and the concave lens 5009 can be precisely adjusted.

[0042] Preferably, the outer walls on both sides of the slide plate 5004 are in contact with the inner walls on both sides of the second housing 5002. The sliding of the slide plate 5004 inside the second housing 5002 ensures the stability of the entire displacement assembly during movement.

[0043] Preferably, a controller 7 is fixedly connected to the inner wall of one side of the housing 1. The controller 7 is electrically connected to the laser scanner 2, the high-speed camera 3, the first motor 4005 and the second motor 5003. The controller 7 can form a closed-loop system of "image acquisition-analysis and judgment-execution adjustment". By analyzing the image of the high-speed camera 3 in real time, the adjustment component 4 and the beam expander component 5 are automatically triggered to operate without manual intervention, thereby improving detection efficiency and adaptability.

[0044] Working principle: When it is necessary to scan and identify the weld seam, the high-speed camera 3 can acquire real-time images of the weld seam area. The acquired image data will be quickly transmitted to the controller 7, which is electrically connected to it, to provide a basis for subsequent motion control.

[0045] After receiving the image data from the high-speed camera 3, the controller 7 analyzes the image. Once it is determined that the weld seam exceeds the scanning range of the current laser scanner 2, the controller 7 issues a command to start the adjustment component 4. The first motor 4005 in the adjustment component 4 starts to operate, and its output end drives the first threaded screw 4004 to rotate. Since the first threaded screw 4004 and the first threaded sleeve 4003 are threadedly connected, when the first threaded screw 4004 rotates, the first threaded sleeve 4003 will move linearly along the axis of the screw. The sliding column 4006 fixed on one side of the outer wall of the first threaded sleeve 4003 will move synchronously with the sleeve. The other end of the sliding column 4006 is fixedly connected to the laser scanner 2. Therefore, the movement of the sliding column 4006 can push the laser scanner 2 to adjust its position, thereby expanding the scanning range of the laser scanner 2 and ensuring that the entire weld seam can be effectively covered, realizing adaptive adjustment for weld seam scanning and recognition.

[0046] Meanwhile, based on the actual conditions of the weld, such as the distance between the weld and the device, and the width of the weld, the controller 7 will control the beam expander 5 to adjust the characteristics of the laser beam. The second motor 5003 of the beam expander 5 starts under the command of the controller 7, and its output drives the second threaded screw 5006 to rotate. The second threaded screw 5006 is threadedly engaged with the second threaded sleeve 5005. When the screw rotates, the second threaded sleeve 5005 will move along the screw. The outer circumference of the second threaded sleeve 5005 is fixedly connected to a sliding plate 5004, which is in turn connected to a fixed frame 5007. Convex lens 5008 and concave lens 5009 are installed inside 007. Therefore, as the slide plate 5004 moves, the distance between convex lens 5008 and concave lens 5009 can be precisely adjusted. By changing the distance between these two lenses, the divergence angle and spot size of the laser beam can be flexibly adjusted. For wider welds, the beam expander 5 can be used to increase the spot size to ensure that the entire weld can be effectively irradiated and scanned by the laser. For situations requiring higher resolution, the spot size can be reduced by adjusting the beam expansion ratio, thereby improving the energy density and scanning accuracy of the laser beam and meeting people's needs for scanning and identifying different welds.

[0047] After the above adjustments, the laser scanner 2 begins to scan the weld seam comprehensively, acquiring three-dimensional data information of the weld seam. This data is also transmitted to the controller 7. The controller 7 performs comprehensive analysis and processing on the three-dimensional data acquired by the laser scanner 2 and the image data acquired by the high-speed camera 3. Through a series of data processing algorithms in the existing technology, it can accurately identify key parameters such as the position, width, and shape of the weld seam, and then judge whether the weld seam quality is qualified according to the preset standards.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. An adaptively adjustable laser scanning weld seam identification device, comprising a housing (1), characterized in that, Also includes: A laser scanner (2) for scanning and identifying weld seams, the laser scanner (2) being disposed on one side of the housing (1); A high-speed camera (3) for acquiring images of the weld seam is fixedly connected to one side of the outer wall of the housing (1); The adjustment component (4) is driven to work by acquiring weld images through the high-speed camera (3) to expand the scanning range of the laser scanner (2); A beam expander (5) for adjusting the divergence angle and spot size of the laser beam of the laser scanner (2).

2. The adaptive adjustment laser scanning weld seam identification device according to claim 1, characterized in that, The adjustment assembly (4) includes a first housing (4001) fixedly connected to the inner wall of one side of the housing (1), a first motor (4005) fixedly connected to the outer wall of one side of the first housing (4001), a first threaded screw (4004) fixedly connected to the output end of the first motor (4005), a first threaded sleeve (4003) threadedly connected to the outer circumference of the first threaded screw (4004), a sliding column (4006) fixedly connected to the outer wall of one side of the first threaded sleeve (4003), and the end of the sliding column (4006) away from the first threaded sleeve (4003) fixedly connected to the laser scanner (2).

3. The adaptive adjustment laser scanning weld seam identification device according to claim 2, characterized in that, A through groove (4002) is provided on one side of the outer wall of the housing (1), and one end of the sliding column (4006) passes through the inside of the through groove (4002).

4. The adaptively adjustable laser scanning weld seam identification device according to claim 1, characterized in that, A mounting base (6) is fixedly connected to the side of the housing (1) away from the laser scanner (2).

5. The adaptively adjustable laser scanning weld seam identification device according to claim 3, characterized in that, The beam expander assembly (5) includes a fixed cylinder (5001) fixedly connected to one end of the laser scanner (2). The fixed cylinder (5001) is provided with a fixed frame (5007) inside. There are two sets of fixed frames (5007). A convex lens (5008) and a concave lens (5009) are fixedly connected inside the two sets of fixed frames (5007).

6. The adaptively adjustable laser scanning weld seam identification device according to claim 5, characterized in that, The concave lens (5009) is closer to the end of the laser scanner (2) than the convex lens (5008).

7. The adaptive adjustment laser scanning weld seam identification device according to claim 6, characterized in that, The outer circumferential wall of the fixed cylinder (5001) is fixedly connected to a second box (5002), the second box (5002) is connected to the fixed cylinder (5001), and the interior of the second box (5002) is provided with a displacement component for adjusting the distance between the convex lens (5008) and the concave lens (5009).

8. The adaptively adjustable laser scanning weld seam identification device according to claim 7, characterized in that, The displacement assembly includes a second motor (5003) fixedly connected to the outer wall of one side of the second housing (5002). The output end of the second motor (5003) is fixedly connected to a second threaded screw (5006). The outer circumferential wall of the second threaded screw (5006) is threadedly connected to a second threaded sleeve (5005). The outer circumferential wall of the second threaded sleeve (5005) is fixedly connected to a sliding plate (5004). The sliding plate (5004) is fixedly connected to the fixed frame (5007).

9. The adaptive adjustment laser scanning weld seam identification device according to claim 8, characterized in that, The outer walls on both sides of the skateboard (5004) are in contact with the inner walls on both sides of the second box (5002).

10. The adaptively adjustable laser scanning weld seam identification device according to claim 8, characterized in that, A controller (7) is fixedly connected to one inner wall of the housing (1). The controller (7) is electrically connected to the laser scanner (2), the high-speed camera (3), the first motor (4005), and the second motor (5003).

Images