A steel pipe pole size detection device based on visual detection and a detection method thereof

Abstract

The application discloses a kind of steel pipe pole size detection device and its detection method based on visual detection, belong to steel pipe pole size detection technical field, including detection table and the gantry frame movably arranged on detection table, laser vision sensor for detecting the size of steel pipe pole is fixedly installed on gantry frame, fixed seat is fixedly installed on the detection table, and electric sliding seat is transversely slidably installed on the detection table, electric sliding seat is slidably installed on electric sliding rail, and electric sliding rail is fixedly installed in the detection table inside;Electric sliding seat upper end surface is fixedly installed with moving seat, and double-ring turntable is rotatably installed in moving seat and fixed seat;Buffer mechanism is provided on gantry frame to keep the steel pipe pole stable rotation detection, and buffer mechanism can clean the surface scale, dirt of steel pipe pole and reduce visual detection interference;Through buffering support and friction cleaning to steel pipe pole in rotation process, the precision of visual detection is assisted to improve.

Description

Technical Field

[0001] This invention relates to the field of steel pipe pole dimension inspection technology, specifically to a steel pipe pole dimension inspection device and method based on vision inspection. Background Technology

[0002] Visual inspection of steel pipe pole dimensions mainly relies on machine vision technology, which is completed through three core steps: image acquisition, image processing, and data analysis. A high-resolution 3D industrial camera is used to photograph the steel pipe pole to obtain its three-dimensional shape information. The camera should have high resolution, high precision, and high stability to ensure the accuracy of the measurement results.

[0003] For example, patent CN117367337B discloses a machine vision-based stainless steel pipe size measurement device and method, including a machine body, a motor frame, a drive mechanism, a clamping mechanism, a first support plate fixedly connected to one side of the top of the machine body, a transmission rod rotatably connected to the first support plate, and a three-jaw chuck fixedly connected to one end of the transmission rod; and a moving mechanism, which is installed on the top of the machine body. This device can not only perform circumferential size detection on stainless steel pipes, but also perform synchronous movement detection and surface defect detection, effectively improving the efficiency and effectiveness of stainless steel pipe inspection.

[0004] For example, the patent publication number CN212458294U discloses a steel pipe end ellipticity detection device, which includes a lower drive seat and a mounting base. The lower drive seat is fixedly mounted on the upper end of the mounting base. A drive arm is provided on the outer side of the upper end of the lower drive seat, and a drive upper rod is provided on the outer side of the upper end of the drive arm. A bracket is provided at the outer end of the drive upper rod, and an internal cavity is provided inside the bracket. The steel pipe end ellipticity detection device facilitates detection by using a laser rangefinder and a laser vision sensor on the bracket. During detection, the drive upper rod drives the laser rangefinder and laser vision sensor on the bracket to rotate one revolution along the steel pipe wall. During the rotation, the sensors send the monitoring data to the industrial control computer in real time. The industrial control computer software simulates the dimensional curves of the inner and outer diameters and bevels of the pipe end based on the data sent back by the sensors, and records the data such as the inner and outer diameters and ellipticity of the pipe end through calculation and analysis.

[0005] For example, patent CN208223398U discloses a product inspection device based on machine vision, including: a base, a conveying device, a machine vision dimension measurement system, a pushing system, and an industrial control host; the machine vision dimension measurement system includes a top-view machine vision dimension measurement system, a side-view machine vision dimension measurement system, and a rotating device for rotating the workpiece; the pushing system includes an electric telescopic rod for pushing out unqualified workpieces from the conveyor belt; the top-view machine vision dimension measurement system can be used to detect the front dimensions of the workpiece; the side-view machine vision dimension measurement system and the rotating device can be used to detect the side dimensions of the workpiece; the pushing system and the industrial control host can be used to push out unqualified workpieces from the inspection device.

[0006] Visual inspection has a limited range and may not be able to cover the entire outer contour of the steel pipe pole during the inspection process, resulting in the loss of dimensional information in some areas. In order to expand the inspection range, the steel pipe pole can be rotated. However, if the steel pipe pole is unstable during rotation, such as shaking or vibration, the visual inspection equipment will have difficulty accurately capturing its dimensional information, and the inspection results may be biased. In addition, some steel pipe poles may have dirt on their exterior, which will interfere with the light distribution and cause uneven brightness and contrast changes in the image, affecting the accuracy of dimensional inspection.

[0007] To address the aforementioned issues, there is an urgent need for innovative design based on the existing steel pipe pole dimension detection device. Summary of the Invention

[0008] The purpose of this invention is to provide a vision-based steel pipe pole dimension detection device and method to solve the problems mentioned in the background art, such as the difficulty of the vision detection device to accurately capture the dimension information of the steel pipe pole when it is unstable, such as shaking or vibration, during the rotation detection process, and the possibility of deviation in the detection results. In addition, some steel pipe poles have dirt on their exterior, which can interfere with the light distribution and cause uneven brightness and contrast changes in the image, affecting the accuracy of dimension detection.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a steel pipe pole size detection device and method based on visual inspection, comprising a detection table and a gantry frame movably mounted on the detection table. A laser vision sensor for detecting the size of the steel pipe pole is fixedly installed on the gantry frame. A fixed seat is fixedly installed on the detection table, and an electric slide is slidably installed on the detection table. The electric slide is slidably installed on an electric slide rail, which is fixedly installed inside the detection table. A movable seat is fixedly installed on the upper surface of the electric slide. A double-ring turntable is rotatably installed in both the movable seat and the fixed seat, and a laser detection module for auxiliary detection is installed on both the movable seat and the fixed seat. A power mechanism is provided on the detection table to drive the double-ring turntable to rotate and expand the visual detection range, and the power mechanism can drive the gantry frame to further expand the visual detection range laterally. A buffer mechanism is provided on the gantry frame to maintain the stable rotation and detection of the steel pipe pole, and the buffer mechanism can clean the oxide scale and dirt on the surface of the steel pipe pole to reduce visual inspection interference.

[0010] Preferably, the power mechanism includes a circular groove formed on a fixed base, a toothed ring rotatably disposed in the circular groove, the toothed ring being fixedly sleeved on the outside of the double-ring turntable; a transmission gear is meshed with the toothed ring, the transmission gear being rotatably mounted on the fixed base; a drive gear is meshed with the transmission gear, the drive gear being rotatably mounted on the testing table.

[0011] Preferably, the power mechanism further includes a lead screw rotatably mounted on the testing table, the lead screw being coaxially connected to the drive gear, and the lead screw having an internal threaded bracket sleeved on its external thread. The internal threaded bracket is slidably mounted on the testing table and is fixedly connected to the gantry frame.

[0012] Preferably, the buffer mechanism includes a rectangular frame fixedly mounted on an internal threaded bracket, a rotating cylinder rotatably connected to the rectangular frame; multiple guide seats are fixedly connected at equal angles to the outside of the rotating cylinder, an adjusting seat is telescopically connected to the guide seat, a buffer cylinder is rotatably mounted on the adjusting seat, and a buffer spring is elastically connected between the adjusting seat and the guide seat.

[0013] Preferably, a round rod is fixedly connected to the adjusting seat along the telescopic direction, and a guide channel that slides with the round rod is provided inside the rotating cylinder.

[0014] Preferably, a driven bevel gear is rotatably connected to the rectangular frame, the driven bevel gear is coaxially connected to the rotating cylinder, and a driving bevel gear is meshed with the driven bevel gear; a planar gear is coaxially fixedly connected to the driving bevel gear, and the planar gear is rotatably installed outside the rectangular frame; a rack is fixedly installed on the detection table, and the planar gear is meshed with the rack.

[0015] Preferably, a sliding rod is slidably connected through the rectangular frame, a transmission block is fixed on the sliding rod, the transmission block is correspondingly arranged on the side of the buffer cylinder, and a return spring is elastically connected between the transmission block and the rectangular frame; a limit rod is fixedly connected to the bottom of the transmission block, and the limit rod is slidably connected through the internal thread bracket; a circular hole is opened on the internal thread bracket, and the limit rod moves through the circular hole to contact the surface of the detection table.

[0016] Preferably, multiple electric telescopic rods are fixed at equal angles along the axial direction in the double-ring turntable, and the output end of the electric telescopic rod is fixedly connected to a clamping block for clamping the detection position of the steel pipe rod. The clamping blocks are distributed in the inner ring of the double-ring turntable.

[0017] Preferably, the laser detection module includes a corner bracket fixedly connected to a fixed base and a movable base. An inner support rod is fixedly connected to the corner bracket. An inner transverse laser sensor is fixedly installed on the inner support rod near the inner wall of the steel pipe pole, and an inner longitudinal laser sensor is fixedly installed on the inner support rod along the central axis of the steel pipe pole. An outer support rod is fixedly connected to the inner support rod, and an outer transverse laser sensor is fixedly installed on the outer support rod near the outer wall of the steel pipe pole.

[0018] A vision-based method for detecting the dimensions of steel pipe poles, applied to the aforementioned vision-based steel pipe pole dimension detection device, includes the following steps:

[0019] S1. Rotation and displacement detection: The steel pipe rod is confined in a fixed seat and a movable seat. The steel pipe rod is rotated by a double-ring turntable. The inner and outer diameters and roundness of the steel pipe rod can be quickly detected by the laser detection module.

[0020] By controlling the lateral movement of the laser vision sensor, the range of detection for the outer contour dimensions of the steel pipe pole is expanded, thereby improving the accuracy of the monitoring data.

[0021] S2. Buffer detection: Clean the external dirt of the steel pipe pole; when detecting the size of the steel pipe pole, support the buffer mechanism on the outer wall of the steel pipe pole to keep the rotation detection of the steel pipe pole stable.

[0022] The buffer mechanism contacts and rubs against the outer wall of the steel pipe pole, cleaning the dirt on the outside of the steel pipe pole and reducing visual inspection interference factors.

[0023] S3, Speed ​​Limiting Detection: The buffer mechanism can intermittently limit the moving speed of the laser vision sensor during operation, ensuring that the laser vision sensor can maintain rapid detection while clearly capturing the outer contour dimension data of the detected steel pipe pole.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the steel pipe pole size detection device and its detection method based on vision detection expand the detection range by rotating the steel pipe pole and moving the laser vision sensor. During the size detection process, the rotating steel pipe pole is supported and buffered, and the buffer cylinder in the buffer mechanism makes frictional contact with the surface of the steel pipe pole, which can remove dirt from the surface of the steel pipe pole and reduce visual detection interference.

[0025] Furthermore, the inspection platform is equipped with a power mechanism that drives the double-ring turntable to rotate and expand the visual inspection range. Through the meshing transmission of the drive gear, transmission gear and gear ring, the double-ring turntable can be driven to rotate. The steel pipe rod is clamped and confined in the double-ring turntable, so as to control the rotation of the steel pipe rod to expand the inspection range during the steel pipe rod size inspection process.

[0026] The power mechanism can drive the gantry to further expand the visual detection range laterally, and the drive gear can drive the lead screw to rotate synchronously. Under the threaded transmission between the lead screw and the internal threaded bracket, the gantry and the laser vision sensor can be controlled to move laterally, thereby expanding the size detection range of the laser vision sensor.

[0027] Furthermore, the gantry is equipped with a buffer mechanism to maintain the stable rotation detection of the steel pipe pole. During the rotation of the steel pipe pole, the buffer mechanism rotates and supports the outside of the steel pipe pole. The buffer cylinder in the buffer mechanism intermittently contacts the surface of the steel pipe pole during circumferential rotation. Under the elastic buffering of the buffer spring, the swaying or vibration of the steel pipe pole during rotation can be reduced, thus maintaining the stable rotation of the steel pipe pole and improving the accuracy of visual monitoring data.

[0028] The buffer mechanism can clean the oxide scale and dirt on the surface of the steel pipe pole, reducing visual inspection interference. When the buffer cylinder rotates and comes into contact with the surface of the steel pipe pole, friction occurs between the two, which can remove some of the dirt on the surface of the steel pipe pole and reduce the interference of dirt on visual inspection.

[0029] The buffer cylinder in contact with the surface of the steel pipe pole moves closer to the rotating cylinder, and its pushing slide acts on the buffer cylinder on the other side of the rotating cylinder. From the time the other side of the buffer cylinder is subjected to the thrust to the time when the thrust disappears, it vibrates under the elastic action of the buffer spring, so that it can vibrate and remove chips autonomously, and maintain the function of continuous friction of the buffer cylinder to remove dirt from the surface of the steel pipe pole.

[0030] When the buffer cylinder rotates and contacts the transmission blocks on both sides of the rectangular frame, it can push the transmission blocks and the limit rod to move laterally, so that the limit rod moves and presses against the detection table, thereby reducing the instantaneous speed of the gantry moving laterally, so that the laser vision sensor can intermittently stop to capture clearer images of the outer contour of the steel pipe pole. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the detection stage structure of the present invention.

[0032] Figure 2 This is a schematic diagram of the fixing base structure of the present invention.

[0033] Figure 3 This is a schematic diagram of the drive gear structure of the present invention.

[0034] Figure 4 This is a schematic diagram of the toothed ring structure of the present invention.

[0035] Figure 5 This is a schematic diagram of the movable seat structure of the present invention.

[0036] Figure 6 This is a schematic diagram of the internal support structure of the present invention.

[0037] Figure 7 This is a schematic diagram of the cross-sectional structure of the double-ring turntable of the present invention.

[0038] Figure 8 This is a schematic diagram of the gantry structure of the present invention.

[0039] Figure 9 This is a schematic diagram of the rectangular frame structure of the present invention.

[0040] Figure 10 This is a schematic diagram of the buffer cylinder structure of the present invention.

[0041] Figure 11 This is a schematic diagram of the rotating cylinder structure of the present invention.

[0042] Figure 12 This is a schematic diagram of the guide seat structure of the present invention.

[0043] Figure 13 This is a schematic diagram of the buffer spring structure of the present invention.

[0044] Figure 14 This is a schematic diagram of the limiting rod structure of the present invention.

[0045] In the diagram: 1. Inspection table; 2. Gantry frame; 3. Laser vision sensor; 4. Fixed base; 5. Electric slide; 51. Electric slide rail; 6. Moving base; 7. Double-ring turntable; 71. Electric telescopic rod; 72. Clamping block; 8. Laser detection module; 81. Angle bracket; 82. Inner support rod; 83. Inner transverse laser sensor; 84. Inner longitudinal laser sensor; 85. Outer support rod; 86. Outer transverse laser sensor; 9. Circular groove; 10. Gear ring; 11. Transmission... 12. Drive gear; 13. Lead screw; 14. Internal threaded bracket; 15. Rectangular frame; 16. Rotating cylinder; 161. Driven bevel gear; 162. Driven bevel gear; 163. Planar gear; 164. Rack; 17. Guide seat; 18. Adjusting seat; 19. Buffer cylinder; 20. Buffer spring; 21. Round rod; 22. Guide channel; 23. Transmission block; 24. Return spring; 25. Limiting rod; 26. Round hole; 27. Slide rod. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Example 1: Please refer to Figures 1-7 The present invention provides the following technical solution: a steel pipe pole size detection device and its detection method based on visual inspection, comprising a detection table 1 and a gantry frame 2 movably mounted on the detection table 1. A laser vision sensor 3 for detecting the size of the steel pipe pole is fixedly installed on the gantry frame 2. A fixed seat 4 is fixedly installed on the detection table 1, and an electric slide block 5 is slidably installed on the detection table 1. The electric slide block 5 is slidably installed on an electric slide rail 51, which is fixedly installed inside the detection table 1. A movable seat 6 is fixedly installed on the upper end face of the electric slide block 5. A double-ring turntable 7 is rotatably installed in both the movable seat 6 and the fixed seat 4, and a laser detection module 8 for auxiliary detection is installed on both the movable seat 6 and the fixed seat 4. A power mechanism is provided on the detection table 1 to drive the double-ring turntable 7 to rotate and expand the visual detection range, and the power mechanism can drive the gantry frame 2 to further expand the visual detection range laterally. A buffer mechanism is provided on the gantry frame 2 to maintain the stable rotation detection of the steel pipe pole, and the buffer mechanism can clean the oxide scale and dirt on the surface of the steel pipe pole to reduce visual detection interference.

[0048] Please see Figures 2-5 and Figure 8The power mechanism includes a circular groove 9 formed on the fixed base 4, in which a gear ring 10 is rotatably disposed. The gear ring 10 is fixedly sleeved on the outside of the double-ring turntable 7. A transmission gear 11 is meshed with the gear ring 10 and is rotatably mounted on the fixed base 4. A drive gear 12 is meshed with the transmission gear 11 and is rotatably mounted on the testing table 1. The power mechanism also includes a lead screw 13 rotatably mounted on the testing table 1. The lead screw 13 is coaxially connected to the drive gear 12, and an internal threaded bracket 14 is fitted onto the external thread of the lead screw 13. The internal threaded bracket 14 is slidably mounted on the testing table 1 and is fixedly connected to the gantry 2.

[0049] Please see Figures 2-7 In the double-ring turntable 7, multiple electric telescopic rods 71 ​​are fixed at equal angles along the axial direction. The output end of the electric telescopic rods 71 ​​is fixedly connected to clamping blocks 72 for detecting the position of the steel pipe rod. The clamping blocks 72 are distributed in the inner ring of the double-ring turntable 7. The laser detection module 8 includes a corner bracket 81 fixedly connected to the fixed base 4 and the movable base 6. An inner support rod 82 is fixedly connected to the corner bracket 81. An inner transverse laser sensor 83 is fixedly installed on the inner support rod 82 near the inner wall of the steel pipe rod, and an inner longitudinal laser sensor 84 is fixedly installed on the inner support rod 82 along the central axis of the steel pipe rod. An outer support rod 85 is fixedly connected to the inner support rod 82, and an outer transverse laser sensor 86 is fixedly installed on the outer support rod 85 near the outer wall of the steel pipe rod.

[0050] Before testing, the steel pipe pole is clamped and inserted into the fixed seat 4. The electric telescopic rod 71 inside the fixed seat 4 pushes the clamping block 72 to clamp and limit the steel pipe pole to the outside. The electric slide rail 51 controls the electric slide seat 5 to move laterally. The electric slide seat 5 drives the moving seat 6 to move closer to the steel pipe pole, so that the moving seat 6 is fitted onto the other end of the steel pipe pole. The electric telescopic rod 71 inside the moving seat 6 pushes the clamping block 72 to move and clamp the steel pipe pole to the outside, thus limiting both ends of the steel pipe pole on the testing table 1.

[0051] The laser vision sensor 3 is positioned above the steel pipe pole, and the laser detection module 8 is positioned at both ends of the steel pipe pole. During detection, the steel pipe pole is rotated to expand the detection range. The motor on the detection platform 1 controls the rotation of the drive gear 12. The drive gear 12, transmission gear 11, and gear ring 10 mesh sequentially, driving the gear ring 10 to rotate. The gear ring 10 is fixed to the outside of the double-ring turntable 7, which controls the rotation of the double-ring turntable 7 embedded in the fixed base 4, thereby driving the steel pipe pole to rotate. This ensures that the outer surface of the steel pipe pole can be captured by the laser vision sensor 3, avoiding any omissions in the detection. At the same time, the inner transverse laser sensor 83 and the outer transverse laser sensor 86 in the laser detection module 8 correspond to the inner and outer sides of the steel pipe pole, respectively, which can assist in the detection of the inner and outer diameters and roundness of the steel pipe pole. The inner longitudinal laser sensor 84 at both ends of the steel pipe pole can measure the overall length of the steel pipe pole.

[0052] When the drive gear 12 rotates, it drives the lead screw 13 to rotate synchronously. The lead screw 13 is threadedly connected to the internal thread bracket 14. Under the threaded transmission, it can control the internal thread bracket 14 to move laterally on the inspection table 1. The internal thread bracket 14 drives the gantry 2 and the laser vision sensor 3 to move laterally synchronously. It can expand the visual detection range of the laser vision sensor 3 and fully capture and detect the outer contour of the steel pipe pole.

[0053] Example 2: Please refer to Figures 8-13 Based on Embodiment 1, a buffer mechanism is also disclosed, the specific structure of which is as follows: The buffer mechanism includes a rectangular frame 15 fixedly mounted on an internally threaded bracket 14, and a rotating cylinder 16 rotatably connected to the rectangular frame 15; multiple guide seats 17 are fixedly connected at equal angles to the outside of the rotating cylinder 16, and an adjusting seat 18 is telescopically connected to the guide seat 17; a buffer cylinder 19 is rotatably mounted on the adjusting seat 18, and a buffer spring 20 is elastically connected between the adjusting seat 18 and the guide seat 17. A round rod 21 is fixedly connected to the adjusting seat 18 along the telescopic direction, and a guide channel 22 that slides with the round rod 21 is opened inside the rotating cylinder 16.

[0054] Please see Figures 8-11 A driven bevel gear 161 is rotatably connected to the rectangular frame 15. The driven bevel gear 161 is coaxially connected to the rotating cylinder 16, and a driving bevel gear 162 is meshed with the driven bevel gear 161. A planar gear 163 is coaxially fixedly connected to the driving bevel gear 162, and the planar gear 163 is rotatably mounted on the outside of the rectangular frame 15. A rack 164 is fixedly mounted on the detection table 1, and the planar gear 163 meshes with the rack 164.

[0055] Please see Figures 9-14A sliding rod 27 is slidably connected through the rectangular frame 15. A transmission block 23 is fixed on the sliding rod 27. The transmission block 23 is correspondingly arranged on the side of the buffer cylinder 19, and a return spring 24 is elastically connected between the transmission block 23 and the rectangular frame 15. A limit rod 25 is fixedly connected to the bottom of the transmission block 23. The limit rod 25 is slidably connected through the internal thread bracket 14. A circular hole 26 is opened on the internal thread bracket 14. The limit rod 25 moves through the circular hole 26 and contacts the surface of the detection table 1.

[0056] The buffer mechanism on the internal threaded bracket 14 is set on the outside of the steel pipe rod. During the rotation detection process, the steel pipe rod may shake or vibrate. The buffer mechanism can elastically buffer the shaking force or vibration force, maintain the stability of the rotation detection of the steel pipe rod, and improve the accuracy of visual monitoring data.

[0057] During the lateral movement of the internal threaded bracket 14, it drives the rectangular frame 15 to move laterally synchronously. The planar gear 163 on the rectangular frame 15 meshes with the rack 164 on the detection table 1, thereby driving the planar gear 163 to rotate. The planar gear 163 is coaxially connected with the active bevel gear 162, which can adjust the active bevel gear 162 to rotate synchronously. The active bevel gear 162 meshes with the driven bevel gear 161. Under the gear meshing transmission, it can drive the rotating cylinder 16 to rotate. Multiple buffer cylinders 19 outside the rotating cylinder 16 rotate circumferentially. The buffer cylinders 19 rotate sequentially and support the outside of the steel pipe rod. Under the elastic adjustment of the buffer spring 20, the stability of the rotation of the steel pipe rod can be maintained. At the same time, when the buffer cylinders 19 rotate and come into contact with the outer surface of the steel pipe rod, friction is generated. Under the action of friction, the oxide scale, dirt and other substances on the outer surface of the steel pipe rod can be removed, reducing the interference of visual inspection and recognition.

[0058] The buffer cylinder 19, which is in contact with the surface of the steel pipe rod, moves closer to the guide seat 17 under the squeezing action. The buffer cylinder 19 drives the adjusting seat 18 and the round rod 21 to move synchronously, so that the round rod 21 slides along the direction of the guide channel 22. The round rod 21 moves and contacts the round rod 21 on the other side of the rotating cylinder 16. When the round rod 21 on the other side is subjected to the thrust until the thrust disappears, in conjunction with the buffer spring 20, the buffer cylinder 19 at the corresponding position of the round rod 21 on the other side can vibrate. Under the vibration action, the buffer cylinder 19 can assist in chip removal and maintain its continuous friction with the surface of the steel pipe rod to clean dirt.

[0059] During the circumferential rotation of the buffer cylinder 19, it also comes into contact with the transmission blocks 23 on both sides of the rectangular frame 15. When the buffer cylinder 19 moves and contacts the transmission blocks 23, the friction can remove the stains attached to the surface of the buffer cylinder 19. At the same time, the buffer cylinder 19 squeezes the transmission blocks 23 to move, pushing the transmission blocks 23 and the slide rod 27 to move laterally. The transmission blocks 23 drive the fixed limit rod 25 below to move synchronously, so that the limit rod 25 moves through the circular hole 26 and presses against the detection table 1, so that the moving internal thread bracket 14 and gantry 2 have a momentary pause, so that the laser vision sensor 3 can intermittently identify a clearer image of the outer contour of the steel pipe pole in the paused and stationary state, which can assist in the subsequent size analysis and external shape analysis of the steel pipe pole.

[0060] A vision-based method for detecting the dimensions of steel pipe poles, applied to the aforementioned vision-based steel pipe pole dimension detection device, includes the following steps:

[0061] S1. Rotation and displacement detection: The steel pipe rod is confined in the fixed seat 4 and the movable seat 6. The steel pipe rod is rotated by the double ring turntable 7. The inner and outer diameters and roundness of the steel pipe rod can be quickly detected by the laser detection module 8.

[0062] By controlling the lateral movement of the laser vision sensor 3, the range of detection of the outer contour dimensions of the steel pipe pole is expanded, thereby improving the accuracy of the monitoring data.

[0063] S2. Buffer detection: Clean the external dirt of the steel pipe pole; when detecting the size of the steel pipe pole, support the buffer mechanism on the outer wall of the steel pipe pole to keep the rotation detection of the steel pipe pole stable.

[0064] The buffer mechanism contacts and rubs against the outer wall of the steel pipe pole, cleaning the dirt on the outside of the steel pipe pole and reducing visual inspection interference factors.

[0065] S3, speed limiting detection; the buffer mechanism can intermittently limit the moving speed of the laser vision sensor 3 during operation, so that the laser vision sensor 3 can maintain rapid detection while clearly capturing the outer contour dimension data of the detected steel pipe pole.

[0066] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0067] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vision-based steel pipe pole dimension detection device, comprising a detection table (1) and a gantry frame (2) movably mounted on the detection table (1), wherein a laser vision sensor (3) for detecting the dimensions of the steel pipe pole is fixedly installed on the gantry frame (2), characterized in that: A fixed seat (4) is fixedly installed on the testing table (1), and an electric slide (5) is slidably installed on the testing table (1). The electric slide (5) is slidably installed on the electric slide rail (51), and the electric slide rail (51) is fixedly installed inside the testing table (1). A movable seat (6) is fixedly installed on the upper end face of the electric slide (5). A double-ring turntable (7) is rotatably installed in both the movable seat (6) and the fixed seat (4). A laser detection module (8) for auxiliary detection is installed on both the movable seat (6) and the fixed seat (4). The inspection table (1) is equipped with a power mechanism that drives the double-ring turntable (7) to rotate and expand the visual inspection range, and the power mechanism can drive the gantry (2) to further expand the visual inspection range laterally; The gantry (2) is equipped with a buffer mechanism to keep the steel pipe rod rotating stably for detection, and the buffer mechanism can clean the oxide scale and dirt on the surface of the steel pipe rod to reduce visual detection interference; The power mechanism includes a lead screw (13) rotatably mounted on the testing table (1), the lead screw (13) is coaxially connected to the drive gear (12), and the lead screw (13) is provided with an internal thread bracket (14) on its external thread. The internal thread bracket (14) is slidably mounted on the testing table (1), and the internal thread bracket (14) is fixedly connected to the gantry (2). The buffer mechanism includes a rectangular frame (15) fixedly mounted on an internal threaded bracket (14), a rotating cylinder (16) rotatably connected in the rectangular frame (15); multiple guide seats (17) are fixedly connected at equal angles to the outside of the rotating cylinder (16), an adjusting seat (18) is telescopically connected in the guide seat (17), a buffer cylinder (19) is rotatably mounted on the adjusting seat (18), and a buffer spring (20) is elastically connected between the adjusting seat (18) and the guide seat (17).

2. The vision-based steel pipe pole dimension detection device according to claim 1, characterized in that: The power mechanism includes a circular groove (9) opened on the fixed seat (4), a toothed ring (10) is rotatably arranged in the circular groove (9), and the toothed ring (10) is fixedly sleeved on the outside of the double ring turntable (7); A transmission gear (11) is meshed with the toothed ring (10), and the transmission gear (11) is rotatably mounted on the fixed seat (4); A drive gear (12) is meshed with the transmission gear (11), and the drive gear (12) is rotatably mounted on the testing table (1).

3. The steel pipe pole dimension detection device based on vision inspection according to claim 2, characterized in that: A round rod (21) is fixedly connected to the adjusting seat (18) along the telescopic direction, and a guide channel (22) is opened inside the rotating cylinder (16) to slide with the round rod (21).

4. The vision-based steel pipe pole dimension detection device according to claim 3, characterized in that: A driven bevel gear (161) is rotatably connected to the rectangular frame (15). The driven bevel gear (161) is coaxially connected to the rotating cylinder (16), and a driving bevel gear (162) is meshed with the driven bevel gear (161). A planar gear (163) is coaxially fixedly connected to the drive bevel gear (162), and the planar gear (163) is rotatably mounted on the outside of the rectangular frame (15); A rack (164) is fixedly installed on the testing table (1), and a planar gear (163) meshes with the rack (164).

5. The steel pipe pole dimension detection device based on vision inspection according to claim 3, characterized in that: A sliding rod (27) is slidably connected through the rectangular frame (15). A transmission block (23) is fixed on the sliding rod (27). The transmission block (23) is correspondingly arranged on the side of the buffer cylinder (19). A return spring (24) is elastically connected between the transmission block (23) and the rectangular frame (15). The bottom of the transmission block (23) is fixedly connected to a limit rod (25), and the limit rod (25) is slidably connected to the internal thread bracket (14). The internal threaded bracket (14) has a circular hole (26), and the limiting rod (25) moves through the circular hole (26) and contacts the surface of the testing table (1).

6. The steel pipe pole dimension detection device based on vision inspection according to claim 1, characterized in that: Multiple electric telescopic rods (71) are fixed at equal angles along the axial direction in the double-ring turntable (7). The output end of the electric telescopic rod (71) is fixedly connected to a clamping block (72) for clamping the steel pipe rod detection position. The clamping block (72) is distributed in the inner ring of the double-ring turntable (7).

7. The steel pipe pole dimension detection device based on vision inspection according to claim 1, characterized in that: The laser detection module (8) includes a corner bracket (81) fixedly connected to a fixed base (4) and a movable base (6). An inner support rod (82) is fixedly connected to the corner bracket (81). An inner transverse laser sensor (83) is fixedly installed on the inner support rod (82) on the side close to the inner wall of the steel pipe rod, and an inner longitudinal laser sensor (84) is fixedly installed on the inner support rod (82) along the central axis of the steel pipe rod. An outer support rod (85) is fixedly connected to the inner support rod (82), and an outer transverse laser sensor (86) is fixedly installed on the outer support rod (85) on the side near the outer wall of the steel pipe rod.

8. A method for detecting the dimensions of steel pipe poles based on vision inspection, characterized in that, The application of a vision-based steel pipe pole dimension detection device as described in any one of claims 1-7 includes the following steps: S1. Rotation and displacement detection: The steel pipe rod is confined in the fixed seat (4) and the movable seat (6). The steel pipe rod is rotated by the double ring turntable (7). The inner and outer diameters and roundness of the steel pipe rod can be quickly detected by the laser detection module (8). Control the laser vision sensor (3) to move laterally, expand the range of detection of the outer contour dimensions of the steel pipe pole, and improve the accuracy of the monitoring data; S2. Buffer inspection: Clean the external dirt of the steel pipe pole; when inspecting the dimensions of the steel pipe pole, support the buffer mechanism on the outer wall of the steel pipe pole to keep the rotation inspection of the steel pipe pole stable; The buffer mechanism contacts and rubs against the outer wall of the steel pipe pole, cleaning the dirt on the outside of the steel pipe pole and reducing visual inspection interference factors; S3, speed limit detection; the buffer mechanism can intermittently limit the moving speed of the laser vision sensor (3) during operation, so that the laser vision sensor (3) can clearly capture the outer contour dimension data of the steel pipe rod while maintaining rapid detection.

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