Steel pipe pole size detection device based on visual detection and detection method thereof

Abstract

The invention discloses a steel pipe pole size detection device based on visual inspection and a detection method thereof, and belongs to the technical field of steel pipe pole size detection.The steel pipe pole size detection device comprises a detection table and a portal frame movably arranged on the detection table, and a laser visual sensor used for detecting the size of a steel pipe pole is fixedly installed on the portal frame; a fixed seat is fixedly mounted on the detection table, an electric sliding seat is transversely mounted on the detection table in a sliding manner, the electric sliding seat is mounted on an electric sliding rail in a sliding manner, and the electric sliding rail is fixedly mounted in the detection table; a movable seat is fixedly mounted on the upper end surface of the electric sliding seat; double-ring turntables are rotationally mounted in the movable seat and the fixed seat; the portal frame is provided with a buffer mechanism for keeping stable rotation detection of the steel pipe pole, and the buffer mechanism can clean oxide skin and dirt on the surface of the steel pipe pole to reduce visual detection interference; and through buffering supporting and friction cleaning of the steel pipe pole in the rotating process, the accuracy of visual inspection is improved in an auxiliary mode.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe rod size detection, and in particular to a steel pipe rod size detection device based on visual detection and a detection method thereof. Background Art

[0002] Visual inspection of steel pipe rod 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 rod to obtain its three-dimensional morphological information. The camera should have high resolution, high precision, and high stability to ensure the accuracy of the measurement results.

[0003] For example, the patent with publication number CN117367337B discloses a stainless steel pipe size measuring device and method based on machine vision, which includes a machine body, a motor frame, the motor frame is fixedly installed at the bottom of the machine body, and a driving mechanism is provided on the motor frame; a clamping mechanism, the clamping mechanism is installed above the machine body, the clamping mechanism includes 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; a moving mechanism, the moving mechanism is installed on the top of the machine body; not only can the circumferential size of the stainless steel pipe be detected, but the stainless steel pipe can also be synchronously moved and detected, and the surface defects of the stainless steel pipe can also be synchronously detected, which effectively improves the effect and efficiency of the stainless steel pipe detection.

[0004] For example, the patent with publication number CN212458294U discloses a steel pipe end ovality detection device, which includes a lower drive seat and a mounting base. The lower drive seat is fixedly installed at the upper end position 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. The outer end of the drive upper rod is provided with a bracket, and the interior of the bracket is provided with an internal cavity. The steel pipe end ovality detection device is convenient for detection and use through the laser ranging sensor and laser vision sensor on the bracket. During detection, the drive upper rod drives the laser ranging sensor and laser vision sensor on the bracket to rotate along the wall of the steel pipe. In this way, during the rotation process, the sensor sends the monitoring data to the industrial computer in real time. The industrial computer software simulates the dimensional curves of the inner and outer diameters and the groove of the pipe end based on the data sent back by the sensor, and records the inner and outer diameters, ovality and other data of the pipe end through calculation and analysis.

[0005] For example, the patent publication number 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 an upward-looking machine vision dimension measurement system, a side-looking machine vision dimension measurement system, and also includes a rotating device for rotating the workpiece; the pushing system includes an electric telescopic rod for pushing unqualified workpieces out of the conveyor belt; the purpose of detecting the front dimension of the workpiece can be achieved by setting the upward-looking machine vision dimension measurement system; the purpose of detecting the side dimension of the workpiece can be achieved by setting the side-looking machine vision dimension measurement system and the rotating device; the purpose of pushing unqualified workpieces out of this inspection device can be achieved by setting the pushing system and the industrial control host.

[0006] The visual inspection range is limited, and the entire outer contour of the steel pipe rod may not be covered during the inspection process, resulting in the loss of dimensional information in some areas. In order to expand the inspection range, the rotation of the steel pipe rod can be controlled. If the steel pipe rod shakes or vibrates during rotation, it is difficult for the visual inspection equipment to accurately capture its dimensional information, and the inspection results may be biased. In addition, there is dirt on the outside of some steel pipe rods, which will interfere with the light distribution, resulting in uneven brightness and contrast changes in the image, affecting the accuracy of dimensional detection.

[0007] In response to the above problems, it is urgent to carry out innovative design based on the original steel pipe rod size detection device. Summary of the Invention

[0008] The purpose of the present invention is to provide a steel pipe rod size detection device and a detection method based on visual inspection, so as to solve the problem raised in the above background technology that if the steel pipe rod shakes or vibrates during the rotation detection process, it is difficult for the visual inspection equipment to accurately capture its size information, and the detection results may be biased. In addition, there is dirt on the outside of some steel pipe rods, which interferes with the light distribution, resulting in uneven brightness and contrast changes in the image, affecting the accuracy of size detection.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a steel pipe rod size detection device based on visual inspection and a detection method thereof, comprising a detection platform and a gantry movably arranged on the detection platform, a laser visual sensor for detecting the size of the steel pipe rod fixedly installed on the gantry, a fixed seat fixedly installed on the detection platform, and an electric slide installed on the detection platform for transverse sliding, the electric slide is slidably installed on the electric slide rail, and the electric slide rail is fixedly installed inside the detection platform; a movable seat is fixedly installed on the upper end face of the electric slide, a double-ring turntable is rotatably installed in the movable seat and the fixed seat, and a laser detection module for auxiliary detection is installed on the movable seat and the fixed seat; a power mechanism for driving the double-ring turntable to rotate to expand the visual detection range is provided on the detection platform, and the power mechanism can drive the gantry to further expand the visual detection range laterally; a buffer mechanism for maintaining the stable rotation detection of the steel pipe rod is provided on the gantry, and the buffer mechanism can clean the oxide scale and dirt on the surface of the steel pipe rod to reduce interference with visual detection.

[0010] Preferably, the power mechanism includes a circular groove opened on the fixed seat, a gear ring is rotatably arranged in the circular groove, and the gear ring is fixedly sleeved on the outside of the double-ring turntable; a transmission gear is meshedly connected next to the gear ring, and the transmission gear is rotatably installed on the fixed seat; a driving gear is meshedly connected next to the transmission gear, and the driving gear is rotatably installed on the detection platform.

[0011] Preferably, the power mechanism also includes a screw rod rotatably mounted on the detection platform, the screw rod is coaxially connected to the driving gear, and the external threaded sleeve of the screw rod is provided with an internal threaded bracket, the internal threaded bracket is slidably mounted on the detection platform, and the internal threaded bracket is fixedly connected to the gantry.

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

[0013] Preferably, a round rod is fixedly connected to the adjustment 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 meshedly connected next to the driven bevel gear; a plane gear is coaxially fixedly connected to the driving bevel gear, and the plane gear is rotatably installed on the outside of the rectangular frame; a rack is fixedly installed on the detection table, and the plane gear is meshedly connected to 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 beside the buffer cylinder, and a reset spring is elastically connected between the transmission block and the rectangular frame; a limiting rod is fixedly connected to the bottom of the transmission block, and the limiting rod is slidably connected through the internal threaded bracket; a circular hole is opened on the internal threaded bracket, and the limiting rod moves through the circular hole to contact the surface of the detection table.

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

[0017] Preferably, the laser detection module includes an angle bracket fixedly connected to the fixed seat and the movable seat, the angle bracket is fixedly connected to an inner support rod, an inner transverse laser sensor is fixedly installed on the side of the inner support rod close to the inner wall of the steel pipe rod, and an inner longitudinal laser sensor is fixedly installed on the inner support rod along the central axis direction of the steel pipe rod; an outer support rod is fixedly connected to the inner support rod, and an outer transverse laser sensor is fixedly installed on the side of the outer support rod close to the outer wall of the steel pipe rod.

[0018] A method for detecting the size of a steel pipe rod based on visual inspection is applied to the above-mentioned device for detecting the size of a steel pipe rod based on visual inspection, comprising the following steps:

[0019] S1. Rotation and displacement detection: The steel pipe rod is confined in the fixed seat and the movable seat, and the steel pipe rod is driven to rotate by the 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] Control the lateral movement of the laser vision sensor to expand the range of detection of the outer contour dimensions of steel pipes and improve the accuracy of monitoring data.

[0021] S2. Buffer detection, clean the dirt on the outside of the steel pipe rod; when detecting the size of the steel pipe rod, support the buffer mechanism on the outer wall of the steel pipe rod to keep the rotation detection of the steel pipe rod stable.

[0022] The buffer mechanism contacts and rubs against the outer wall of the steel pipe rod to clean the dirt on the outside of the steel pipe rod and reduce interference factors in visual inspection.

[0023] S3. Speed ​​limit detection: When the buffer mechanism is running, it can intermittently limit the moving speed of the laser vision sensor, so that the laser vision sensor can maintain rapid detection while being able to clearly capture and detect the outer contour size data of the steel pipe rod.

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

[0025] Furthermore, the inspection platform is provided with a power mechanism for driving the double-ring turntable to rotate and expand the visual inspection range. Through the meshing transmission of the driving gear, the transmission gear and the gear ring, the double-ring turntable can be driven to rotate, and the steel pipe rod is clamped and confined in the double-ring turntable, thereby achieving the purpose of controlling 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 horizontally to further expand the visual detection range, and the driving gear can drive the lead screw to rotate synchronously. Under the threaded transmission of the lead screw and the internal threaded bracket, the gantry and the laser vision sensor can be controlled to move horizontally, thereby expanding the size detection range of the laser vision sensor.

[0027] Furthermore, a buffer mechanism is provided on the gantry to maintain stable rotation detection of the steel pipe rod. During the process of controlling the rotation of the steel pipe rod, the buffer mechanism rotates and is supported on the outside of the steel pipe rod. The buffer cylinder in the buffer mechanism rotates circumferentially and contacts the surface of the steel pipe rod intermittently. Under the elastic buffering of the buffer spring, the shaking or vibration of the steel pipe rod during rotation can be reduced, thereby maintaining stable rotation of the steel pipe rod 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 rod and reduce the interference of visual detection. When the buffer cylinder rotates and contacts the surface of the steel pipe rod, friction occurs between the two, which can remove some dirt on the surface of the steel pipe rod and reduce the interference of dirt on visual detection.

[0029] The buffer cylinder in contact with the surface of the steel pipe rod moves close to the rotating cylinder, which pushes the sliding rod to act on the buffer cylinder on the other side of the rotating cylinder. The buffer cylinder on the other side shakes under the elastic action of the buffer spring from the stage when the thrust is applied to the stage when the thrust disappears, so that it can shake and remove chips autonomously, and maintain the buffer cylinder's continuous friction to remove dirt from the surface of the steel pipe rod.

[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 inspection table, thereby reducing the instantaneous speed of the gantry during horizontal movement, allowing the laser vision sensor to intermittently pause to capture a clearer image of the outer contour of the steel pipe rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the detection platform of the present invention.

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

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

[0034] Figure 4 Schematic diagram of the gear ring structure of the present invention.

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

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

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

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

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

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

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

[0042] Figure 12 It 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 figure: 1. Inspection table; 2. Gantry; 3. Laser vision sensor; 4. Fixed seat; 5. Electric slide seat; 51. Electric slide rail; 6. Moving seat; 7. Double-ring turntable; 71. Electric telescopic rod; 72. Clamp; 8. Laser detection module; 81. Angle bracket; 82. Inner support rod; 83. Inner horizontal laser sensor; 84. Inner longitudinal laser sensor; 85. Outer support rod; 86. Outer horizontal laser sensor; 9. Circular groove; 10. Gear ring; 11. Transmitter Drive gear; 12. Driving gear; 13. Screw; 14. Internal thread bracket; 15. Rectangular frame; 16. Rotating cylinder; 161. Driven bevel gear; 162. Driving bevel gear; 163. Plane gear; 164. Rack; 17. Guide seat; 18. Adjustment seat; 19. Buffer cylinder; 20. Buffer spring; 21. Round rod; 22. Guide channel; 23. Transmission block; 24. Return spring; 25. Limit rod; 26. Round hole; 27. Sliding rod. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Example 1: Please refer to Figure 1-Figure 7 The present invention provides the following technical solutions: a steel pipe rod size detection device based on visual inspection and a detection method thereof, comprising a detection platform 1 and a gantry 2 movably arranged on the detection platform 1, a laser visual sensor 3 for detecting the size of the steel pipe rod is fixedly installed on the gantry 2, a fixed seat 4 is fixedly installed on the detection platform 1, and an electric slide 5 is installed on the detection platform 1 for horizontal sliding movement, the electric slide 5 is slidably installed on the electric slide rail 51, and the electric slide rail 51 is fixedly installed inside the detection platform 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 the movable seat 6 and the fixed seat 4, and a laser detection module 8 for auxiliary detection is installed on the movable seat 6 and the fixed seat 4; a power mechanism for driving the double-ring turntable 7 to rotate to expand the visual detection range is provided on the detection platform 1, and the power mechanism can drive the gantry 2 to further expand the visual detection range laterally; a buffer mechanism for maintaining the stable rotation detection of the steel pipe rod is provided on the gantry 2, and the buffer mechanism can clean the oxide scale and dirt on the surface of the steel pipe rod to reduce interference with visual detection.

[0048] See also Figure 2-Figure 5 and Figure 8The power mechanism includes a circular groove 9 formed on the fixed seat 4, in which a gear ring 10 is rotatably mounted. The gear ring 10 is fixedly sleeved on the outside of the double-ring turntable 7; a transmission gear 11 is meshedly connected to the gear ring 10, which is rotatably mounted on the fixed seat 4; a drive gear 12 is meshedly connected to the transmission gear 11, which is rotatably mounted on the detection platform 1. The power mechanism also includes a screw rod 13 rotatably mounted on the detection platform 1, which is coaxially connected to the drive gear 12, and an internally threaded bracket 14 is sleeved on the external thread of the screw rod 13. The internally threaded bracket 14 is slidably mounted on the detection platform 1 and fixedly connected to the gantry 2.

[0049] See also Figure 2-Figure 7 Multiple electric telescopic rods 71 ​​are fixed at equal angles along the axis of the double-ring turntable 7. The output ends of the electric telescopic rods 71 ​​are fixedly connected to clamping blocks 72 for clamping the steel pipe rod for detection. The clamping blocks 72 are distributed in the inner ring of the double-ring turntable 7. The laser detection module 8 includes an angle bracket 81 fixedly connected to the fixed seat 4 and the movable seat 6. The angle bracket 81 is fixedly connected to an inner support rod 82. An inner transverse laser sensor 83 is fixedly mounted on the side of the inner support rod 82 near the inner wall of the steel pipe rod, and an inner longitudinal laser sensor 84 is fixedly mounted 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 mounted on the side of the outer support rod 85 near the outer wall of the steel pipe rod.

[0050] Before testing, the steel pipe rod is clamped first, and the steel pipe rod is passed through the fixed seat 4. The electric telescopic rod 71 inside the fixed seat 4 is operated to push the clamping block 72 to clamp and limit it to the outside of the steel pipe rod. The electric slide rail 51 is operated to control the horizontal movement of the electric slide 5. The electric slide 5 drives the moving seat 6 to move close to the steel pipe rod, so that the moving seat 6 is sleeved on the other end of the steel pipe rod. The electric telescopic rod 71 inside the moving seat 6 is operated to push the clamping block 72 to move and clamp it to the outside of the steel pipe rod, and the limit positions of the two ends of the steel pipe rod are set on the testing platform 1.

[0051] The laser vision sensor 3 is set above the steel pipe rod, and the laser detection module 8 is set at both ends of the steel pipe rod. During detection, the steel pipe rod is controlled to rotate to expand the detection range. The motor on the operating detection platform 1 controls the drive gear 12 to rotate, and the drive gear 12, the transmission gear 11 and the gear ring 10 are meshed in sequence. Under the meshing transmission, the gear ring 10 can be driven to rotate. The gear ring 10 is fixed on the outside of the double-ring turntable 7, which controls the double-ring turntable 7 to be engaged in the fixed seat 4 to rotate, thereby driving the steel pipe rod to rotate, so that the outer surface of the steel pipe rod can be photographed by the laser vision sensor 3 to avoid missed 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 rod respectively, which can assist in the detection of the inner and outer diameters and roundness of the steel pipe rod. The inner longitudinal laser sensors 84 at both ends of the steel pipe rod can measure the overall length of the steel pipe rod.

[0052] When the driving gear 12 rotates, it drives the screw rod 13 to rotate synchronously. The screw rod 13 is threadedly connected to the internal thread bracket 14. Under the thread transmission, the internal thread bracket 14 set on the detection platform 1 can be controlled to move horizontally. The internal thread bracket 14 drives the gantry 2 and the laser vision sensor 3 to move horizontally synchronously, which can expand the visual detection range of the laser vision sensor 3 and fully capture and detect the outer contour of the steel pipe rod.

[0053] Example 2: Please refer to Figures 8-13 Based on the first embodiment, a buffer mechanism is also disclosed. Its specific structure is as follows: the buffer mechanism includes a rectangular frame 15 fixedly mounted on an internally threaded bracket 14. A rotating cylinder 16 is rotatably connected to the rectangular frame 15. A plurality of guide seats 17 are fixedly connected to the exterior of the rotating cylinder 16 at equal angles. An adjustment seat 18 is telescopically connected to the guide seat 17. A buffer cylinder 19 is rotatably mounted on the adjustment seat 18. A buffer spring 20 is elastically connected between the adjustment seat 18 and the guide seat 17. A round rod 21 is fixedly connected to the adjustment seat 18 in the telescopic direction. A guide channel 22 is provided inside the rotating cylinder 16 and slidably engages with the round rod 21.

[0054] See also Figures 8-11 A driven bevel gear 161 is rotatably connected to the rectangular frame 15, and 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 plane gear 163 is coaxially fixedly connected to the driving bevel gear 162, and the plane 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 plane gear 163 is meshed with the rack 164.

[0055] See also Figures 9-14A sliding rod 27 is slidably connected through the rectangular frame 15, and a transmission block 23 is fixed on the sliding rod 27. The transmission block 23 is correspondingly arranged next to the buffer cylinder 19, and a reset spring 24 is elastically connected between the transmission block 23 and the rectangular frame 15; a limiting rod 25 is fixedly connected to the bottom of the transmission block 23, and the limiting rod 25 is slidably connected to the internal thread bracket 14; a circular hole 26 is opened on the internal thread bracket 14, and the limiting rod 25 moves through the circular hole 26 to contact the surface of the detection platform 1.

[0056] The buffer mechanism support on the internal thread 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 steel pipe rod rotation detection, and improve the accuracy of the visual monitoring data.

[0057] During the lateral movement, the internal threaded bracket 14 drives the rectangular frame 15 to move laterally synchronously. The flat gear 163 on the rectangular frame 15 is meshed with the rack 164 on the detection platform 1, thereby driving the flat gear 163 to rotate. The flat gear 163 is coaxially connected with the active bevel gear 162, which can mobilize the active bevel gear 162 to rotate synchronously. The active bevel gear 162 is meshed with the driven bevel gear 161. Under the gear meshing transmission, the rotating cylinder 16 can be driven to rotate. The multiple buffer cylinders 19 outside the rotating cylinder 16 rotate in a circle. The buffer cylinders 19 rotate in turn and are supported on 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, friction is generated when the buffer cylinder 19 rotates and contacts the outer surface of the steel pipe rod. Under the action of friction, the oxide scale, dirt, etc. on the outer surface of the steel pipe rod can be removed, thereby reducing the interference of visual detection and recognition.

[0058] The buffer cylinder 19 in contact with the surface of the steel pipe rod is squeezed and moved close to the guide seat 17. The buffer cylinder 19 drives the adjustment 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 thrust until the thrust disappears, the buffer spring 20 can make the buffer cylinder 19 at the corresponding position of the round rod 21 on the other side shake. Under the shaking 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 circular rotation, the buffer cylinder 19 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 with 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 block 23 to move, pushing the transmission block 23 and the slide bar 27 to move laterally. The transmission block 23 drives the fixed limit rod 25 below to move synchronously, so that the limit rod 25 moves through the circular hole 26 and is pressed on the detection table 1, so that the moving internal thread bracket 14 and the gantry 2 have a momentary pause, so that the laser vision sensor 3 can intermittently identify a clearer outer contour image of the steel pipe rod in a paused state, thereby assisting the subsequent size analysis and external morphology analysis of the steel pipe rod.

[0060] A method for detecting the size of a steel pipe rod based on visual inspection is applied to the above-mentioned device for detecting the size of a steel pipe rod based on visual inspection, comprising 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, and the steel pipe rod is driven to rotate by the double-ring turntable 7. The laser detection module 8 can quickly detect the inner and outer diameters and roundness of the steel pipe rod.

[0062] The laser vision sensor 3 is controlled to move laterally to expand the range of detection of the outer contour dimensions of the steel pipe rod and improve the accuracy of the monitoring data.

[0063] S2. Buffer detection, clean the dirt on the outside of the steel pipe rod; when detecting the size of the steel pipe rod, support the buffer mechanism on the outer wall of the steel pipe rod to keep the rotation detection of the steel pipe rod stable.

[0064] The buffer mechanism contacts and rubs against the outer wall of the steel pipe rod to clean the dirt on the outside of the steel pipe rod and reduce interference factors in visual inspection.

[0065] S3, speed limit detection; when the buffer mechanism is running, the moving speed of the laser vision sensor 3 can be intermittently limited, so that the laser vision sensor 3 can maintain rapid detection while being able to clearly capture and detect the outer contour size data of the steel pipe rod.

[0066] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

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

Claims

1. A device for detecting the size of a steel pipe rod based on visual inspection, comprising a detection platform (1) and a gantry (2) movably arranged on the detection platform (1), wherein a laser vision sensor (3) for detecting the size of the steel pipe rod is fixedly mounted on the gantry (2), and characterized in that: A fixed seat (4) is fixedly mounted on the detection platform (1), and an electric slide seat (5) is laterally slidably mounted on the detection platform (1), the electric slide seat (5) is slidably mounted on an electric slide rail (51), and the electric slide rail (51) is fixedly mounted inside the detection platform (1); A movable seat (6) is fixedly mounted on the upper end surface of the electric slide seat (5), a double-ring turntable (7) is rotatably mounted in both the movable seat (6) and the fixed seat (4), and a laser detection module (8) for auxiliary detection is mounted on both the movable seat (6) and the fixed seat (4); The inspection platform (1) is provided with a power mechanism for driving the double-ring turntable (7) to rotate to 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 provided with a buffer mechanism for maintaining the stable rotation detection of the steel pipe rod, and the buffer mechanism can clean the oxide scale and dirt on the surface of the steel pipe rod to reduce visual detection interference.

2. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 1, characterized in that: The power mechanism comprises a circular groove (9) provided on a fixed seat (4), a gear ring (10) being rotatably provided in the circular groove (9), and the gear ring (10) being fixedly sleeved on the outside of the double-ring turntable (7); A transmission gear (11) is meshedly connected to the gear ring (10), and the transmission gear (11) is rotatably mounted on the fixed seat (4); The transmission gear (11) is meshedly connected with a driving gear (12), and the driving gear (12) is rotatably mounted on the detection platform (1).

3. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 2, characterized in that: The power mechanism further comprises a screw rod (13) rotatably mounted on the detection platform (1), the screw rod (13) being coaxially connected to the driving gear (12), and an external thread sleeve of the screw rod (13) being provided with an internal thread bracket (14), the internal thread bracket (14) being slidably mounted on the detection platform (1), and the internal thread bracket (14) being fixedly connected to the gantry (2).

4. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 3, characterized in that: The buffer mechanism comprises a rectangular frame (15) fixedly mounted on an internal thread bracket (14), wherein a rotating cylinder (16) is rotatably connected to the rectangular frame (15); A plurality of guide seats (17) are fixedly connected to the outside of the rotating cylinder (16) at equal angles. An adjusting seat (18) is telescopically connected to the guide seat (17). A buffer cylinder (19) is rotatably mounted on the adjusting seat (18). A buffer spring (20) is elastically connected between the adjusting seat (18) and the guide seat (17).

5. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 4, characterized in that: A round rod (21) is fixedly connected to the adjustment seat (18) along the telescopic direction, and a guide channel (22) is provided inside the rotating cylinder (16) and is slidably matched with the round rod (21).

6. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 4, characterized in that: The rectangular frame (15) is rotatably connected to a driven bevel gear (161), the driven bevel gear (161) is coaxially connected to the rotating cylinder (16), and a driving bevel gear (162) is meshedly connected next to the driven bevel gear (161); A plane gear (163) is coaxially fixedly connected to the driving bevel gear (162), and the plane gear (163) is rotatably mounted on the outside of the rectangular frame (15); A rack (164) is fixedly mounted on the detection platform (1), and the plane gear (163) is meshedly connected with the rack (164).

7. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 4, characterized in that: A slide rod (27) is slidably connected through the rectangular frame (15), a transmission block (23) is fixed on the slide rod (27), the transmission block (23) is correspondingly arranged beside the buffer cylinder (19), and 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); A circular hole (26) is provided on the internal thread bracket (14), and the limiting rod (25) moves through the circular hole (26) to contact the surface of the detection platform (1).

8. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 1, characterized in that: A plurality of electric telescopic rods (71) are fixed at equal angles along the axis direction in the double-ring turntable (7); a clamping block (72) for clamping the steel pipe rod to detect the position is fixedly connected to the output end of the electric telescopic rod (71); and the clamping block (72) is distributed in the inner ring of the double-ring turntable (7).

9. The device for detecting steel pipe and rod dimensions based on visual inspection according to claim 1, characterized in that: The laser detection module (8) comprises an angle bracket (81) fixedly connected to the fixed seat (4) and the movable seat (6); an inner support rod (82) is fixedly connected to the angle bracket (81); an inner transverse laser sensor (83) is fixedly mounted on the inner support rod (82) on a side close to the inner wall of the steel pipe rod; and an inner longitudinal laser sensor (84) is fixedly mounted 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 one side of the outer support rod (85) close to the outer wall of the steel pipe rod.

10. A method for detecting the size of a steel pipe rod based on visual inspection, characterized in that: A steel pipe and rod size detection device based on visual detection as described in any one of claims 1 to 9 comprises the following steps: S1, rotation and displacement detection; the steel pipe rod is confined in the fixed seat (4) and the movable seat (6), and the steel pipe rod is driven to rotate by the double-ring turntable (7), and the inner and outer diameters and roundness of the steel pipe rod can be quickly detected by the laser detection module (8); Controlling the lateral movement of the laser vision sensor (3) to expand the range of detection of the outer contour dimensions of the steel pipe rod and improve the accuracy of the monitoring data; S2. Buffer detection, clean the dirt on the outside of the steel pipe; when detecting the size of the steel pipe, support the buffer mechanism on the outer wall of the steel pipe to keep the rotation of the steel pipe stable; The buffer mechanism contacts and rubs against the outer wall of the steel pipe rod to clean the dirt on the outside of the steel pipe rod and reduce interference factors in visual inspection; S3, speed limit detection; when the buffer mechanism is in operation, the moving speed of the laser vision sensor (3) can be intermittently limited, so that the laser vision sensor (3) can maintain rapid detection while being able to clearly capture and detect the outer contour dimension data of the steel pipe rod.

Images