Defect identification system for strip steel

Abstract

The invention discloses a strip steel defect identification system, which comprises a shell, the bottom of which is provided with an object placing plate; the first guide rail sliding table module is arranged on the first inner side wall of the shell, the first guide rail sliding table module comprises a first sliding table, and the extending direction of the first guide rail sliding table module is from the bottom of the shell to the top of the shell; the camera faces the storage plate and is mechanically connected with the first sliding table; the range finder faces the storage plate and is mechanically connected with the first sliding table, and the first sliding table can drive the range finder and the camera to move synchronously; the controller is electrically connected with the range finder, the first guide rail sliding table module and the camera, and the controller is used for obtaining the detection distance of the range finder when the strip steel is placed on the storage plate; and based on the detection distance and a preset target distance, the first sliding table is controlled to move, so that the distance between the camera and the strip steel reaches the preset target distance. The technical problem that the defect information of the strip steel is low in accuracy is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of metallurgy, and in particular relates to a strip steel defect recognition system. Background Art

[0002] In the past, strip defect identification was done manually. Later, with the rapid development of surface quality inspection technology in the metallurgical industry, machine vision technology gradually became an important technical means for surface defect identification.

[0003] Specifically, machine vision technology involves capturing images of the steel strip surface using a camera. This image is then processed by an image processing device to determine strip defect information. However, in actual production applications, the strip defect information obtained using this method is found to be inaccurate. For example, unclear images can lead to erroneous defect information, while the defect size determined in the image may not match the actual defect size. Therefore, the low accuracy of strip defect information is a pressing technical issue that needs to be addressed. Summary of the Invention

[0004] The embodiment of the present invention provides a strip steel defect recognition system, which solves the technical problem of low accuracy of strip steel defect information.

[0005] In the first aspect, an embodiment of the present invention provides a defect identification system for strip steel, comprising: a shell, a storage plate is provided at the bottom of the shell; a first guide rail slide module is provided on the first inner wall of the shell, the first guide rail slide module includes a first slide, and the extension direction of the first guide rail slide module is from the bottom of the shell to the top of the shell; a camera facing the storage plate and mechanically connected to the first slide; a rangefinder facing the storage plate and mechanically connected to the first slide, the first slide can drive the rangefinder and the camera to move synchronously; a controller is electrically connected to the rangefinder, the first guide rail slide module and the camera, the controller is used to: obtain the detection distance of the rangefinder when the strip steel is placed on the storage plate; based on the detection distance and the preset target distance, control the first slide to move so that the distance between the camera and the strip steel reaches the preset target distance.

[0006] In combination with the first aspect of the present invention, in some embodiments, the defect identification system for strip steel further includes: a connecting block, arranged inside the shell, one end of the connecting block is fixedly connected to the first slide, and the camera and the rangefinder are arranged on the connecting block.

[0007] In combination with the first aspect of the present invention, in some embodiments, the defect identification system for strip steel further includes: a second guide rail slide module, electrically connected to the controller, the extension direction of the second guide rail slide module is parallel to the plane where the storage plate is located, and the first end of the second guide rail slide module is fixedly connected to the first slide; the second guide rail slide module includes a second slide, and the camera is arranged on the second slide.

[0008] In combination with the first aspect of the present invention, in some embodiments, the defect identification system for strip steel further includes: a first fill light, electrically connected to the controller and arranged on a side of the second slide close to the first slide, and the first fill light faces the storage plate.

[0009] In combination with the first aspect of the present invention, in some embodiments, the defect identification system for strip steel further includes: a second fill light, electrically connected to the controller and arranged on a side of the second slide away from the first slide, the camera is located between the first fill light and the second fill light, and the second fill light faces the storage plate.

[0010] In combination with the first aspect of the present invention, in some embodiments, the illumination center axis direction of the first fill light is parallel to the lens orientation of the camera, the angle deviation between the first angle and the second angle is less than a preset angle deviation threshold, the first angle is the angle between the illumination center axis direction of the first fill light and the plane where the storage plate is located, and the second angle is the angle between the illumination center axis direction of the second fill light and the plane where the storage plate is located.

[0011] In combination with the first aspect of the present invention, in some embodiments, the defect recognition system for strip steel further includes: an image processing device, electrically connected to the controller; the controller is also used to: after the distance between the camera and the strip steel reaches the preset target distance, control the first fill light to turn on and the second fill light to turn off; control the second slide to move in a first moving direction so that the camera shoots the strip steel to obtain a first set of images; after obtaining the first set of images, control the first fill light to turn off and the second fill light to turn on; after the first fill light is turned off and the second fill light is turned on, control the second slide to move in a second moving direction so that the camera shoots the strip steel to obtain a second set of images, and the second moving direction is opposite to the first moving direction; control the image processing device to process the first set of images and the second set of images to obtain defect information of the strip steel.

[0012] In combination with the first aspect of the present invention, in some embodiments, the defect identification system for strip steel further includes: a third guide rail slide module, electrically connected to the controller and arranged on the second inner wall of the shell, the second inner wall is opposite to the first inner wall, the extension direction of the third guide rail slide module is from the bottom of the shell to the top of the shell, the first guide rail slide module, the second guide rail slide module and the third guide rail slide module are located in the same plane; the third guide rail slide module includes a third slide, and the second end of the second guide rail slide module is fixedly connected to the third slide; the controller is also used to: based on the detection distance and the preset target distance, control the first slide and the third slide to move synchronously so that the distance between the camera and the strip steel reaches the preset target distance.

[0013] In combination with the first aspect of the present invention, in some embodiments, the defect identification system for strip steel further includes: an object sensing device, which is arranged on the placement plate and is electrically connected to the controller; the controller is further used to: obtain a detection signal of the object sensing device before obtaining the detection distance of the rangefinder; and determine whether there is strip steel placed on the placement plate based on the detection signal.

[0014] In combination with the first aspect of the present invention, in some embodiments, the distance between the rangefinder and the storage board is equal to the distance between the camera and the storage board.

[0015] The one or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0016] The defect identification system for steel strips provided in an embodiment of the present invention includes: a shell, a storage plate is provided at the bottom of the shell; a first guide rail slide module is provided on the first inner side wall of the shell, the first guide rail slide module includes a first slide, and the extension direction of the first guide rail slide module is from the bottom of the shell to the top of the shell; a camera facing the storage plate and mechanically connected to the first slide; a rangefinder facing the storage plate and mechanically connected to the first slide, the first slide can drive the rangefinder and the camera to move synchronously; a controller is electrically connected to the rangefinder, the first guide rail slide module and the camera, the controller is used to: obtain the detection distance of the rangefinder when the steel strip is placed on the storage plate; based on the detection distance and the preset target distance, control the first slide to move so that the distance between the camera and the steel strip reaches the preset target distance. Due to the provision of the first guide rail slide module, the camera can move up and down to adjust the distance between the camera and the steel strip, thereby placing the camera at the optimal shooting height, which can improve the clarity of the image captured by the camera, thereby avoiding the problem of defect information errors caused by unclear images. Furthermore, when the image processing device processes an image, if the device has preset the area size represented by each pixel in the image, the area size represented by each pixel will change when the camera is at different heights. Therefore, the distance between the camera and the steel strip needs to be adjusted to the preset target distance so that the pixels in the image captured by the camera match the preset conditions of the image processing device. This prevents the defect size determined in the image from not matching the actual defect size. This improves the accuracy of defect information on the steel strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a first schematic diagram of a strip steel defect recognition system according to an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of a first guide rail slide module according to an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of a second type of defect recognition system for steel strip according to an embodiment of the present invention;

[0021] Figure 4 This is a third schematic diagram of the strip steel defect recognition system in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] In the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by a person of ordinary skill in the art. If the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0024] Figure 1 Schematic diagram of the first embodiment of the strip steel defect recognition system of the present invention. Figure 1 As shown, a defect recognition system for a strip steel provided by an embodiment of the present invention includes: a housing 10, a storage plate 110 is provided at the bottom of the housing 10; a first guide rail slide module 20 is provided on the first inner side wall of the housing 10, the first guide rail slide module 20 includes a first slide 210, and the extension direction of the first guide rail slide module 20 is from the bottom of the housing 10 to the top of the housing 10; a camera 30, facing the storage plate 110, and mechanically connected to the first slide 210; a rangefinder 40, facing The storage plate 110 is mechanically connected to the first slide 210, and the first slide 210 can drive the rangefinder 40 and the camera 30 to move synchronously; the controller is electrically connected to the rangefinder 40, the first guide rail slide module 20 and the camera 30, and the controller is used to: obtain the detection distance of the rangefinder 40 when a strip of steel is placed on the storage plate 110; based on the detection distance and the preset target distance, control the first slide 210 to move so that the distance between the camera 30 and the strip of steel reaches the preset target distance.

[0025] In some embodiments, the first slide 210 may include a first through hole, a second through hole, and a third through hole located between the first through hole and the second through hole, and the third through hole is a threaded hole; the first guide rail slide module 20 may also include: a first base 220, the first base 220 extending from the bottom of the shell 10 to the top of the shell 10; a first lead screw 230, which is connected to the first slide 210 through the third through hole, and the first lead screw 230 extends from one end of the first base 220 to the other end of the first base 220; a first guide rod 240, which is connected to the first slide 210 through the third through hole. The first guide rod 240 is connected to the first slide 210 through the first through hole, and extends from one end of the first base 220 to the other end of the first base 220; the second guide rod 250 is connected to the first slide 210 through the second through hole, and extends from one end of the first base 220 to the other end of the first base 220; the first driving module 260 is arranged at one end of the first base 220, and the driving end of the first driving module 260 is fixedly connected to one end of the first screw 230, and the first driving module 260 is electrically connected to the controller.

[0026] refer to Figure 2 As shown, Figure 2 Schematic diagram of the first guide rail slide module in an embodiment of the present invention.

[0027] It should be noted that when the first drive module 260 drives the first lead screw 230 to rotate, the first slide 210 will move up and down. The movement direction of the first slide 210 can be from the bottom of the shell 10 to the top of the shell 10, or from the top of the shell 10 to the bottom of the shell 10. Since the first slide 210 can drive the rangefinder 40 and the camera 30 to move synchronously, the distance between the camera 30 and the strip can be adjusted. In addition, the camera 30 and the rangefinder 40 are both arranged inside the shell 10. The camera 30 can be an industrial camera 30, and the rangefinder 40 can be an infrared rangefinder 40 or a laser rangefinder 40, etc. The detection distance of the rangefinder 40 can be the average value after multiple measurements, and the detection distance of the rangefinder 40 is the distance between the rangefinder 40 and the strip.

[0028] It should be noted that the distance between the rangefinder 40 and the storage plate 110 may be equal to or different from the distance between the camera 30 and the storage plate 110. If the distance between the rangefinder 40 and the storage plate 110 is equal to the distance between the camera 30 and the storage plate 110, when adjusting the distance, if the detection distance of the rangefinder 40 is equal to the preset target distance, it can be determined that the distance between the camera 30 and the steel strip has reached the preset target distance. If the distance between the rangefinder 40 and the storage plate 110 is not equal to the distance between the camera 30 and the storage plate 110, when adjusting the distance, whether the distance between the camera 30 and the steel strip has reached the preset target distance can be determined based on the relative height difference between the camera 30 and the rangefinder 40, the detection distance, and the preset target distance.

[0029] It should be noted that the camera 30 and the rangefinder 40 are both mechanically connected to the first slide 210, and the mechanical connection includes direct connection and indirect connection. Regarding direct connection, the first slide 210 may be provided with a mounting hole, and the camera 30 and the rangefinder 40 may be directly connected to the first slide 210 through the mounting hole. Regarding indirect connection, the connecting member may be first connected to the first slide 210, and then the camera 30 and the rangefinder 40 may be connected to the connecting member. The connecting member may also be in various forms, for example, the connecting member may be a connecting block 50 or a second guide rail slide module 60, which will be described in detail below:

[0030] In some embodiments, the defect identification system for strip steel may further include: a connecting block 50, which is arranged inside the shell 10, one end of the connecting block 50 is fixedly connected to the first slide 210, and the camera 30 and the rangefinder 40 are arranged on the connecting block 50.

[0031] It should be noted that the connection block 50 can refer to Figure 1 shown.

[0032] In other embodiments, the defect identification system for strip steel may further include: a second guide rail slide module 60, electrically connected to the controller, the extension direction of the second guide rail slide module 60 is parallel to the plane where the storage plate 110 is located, and the first end of the second guide rail slide module 60 is fixedly connected to the first slide 210; the second guide rail slide module 60 includes a second slide 610, and the camera 30 is arranged on the second slide 610.

[0033] refer to Figure 3 As shown, Figure 3This is a second schematic diagram of a strip steel defect recognition system according to an embodiment of the present invention. It should be noted that during the camera 30's capture process, images may be unclear due to, for example, reflections. To address this issue, the embodiment of the present invention includes a second guide rail slide module 60, allowing the camera 30 to capture images at different horizontal positions. This allows the camera 30 to be positioned optimally for capturing images, thus avoiding image blurring due to reflections and improving the clarity of images captured by the camera 30.

[0034] In some embodiments, the second slide 610 includes a fourth through hole, a fifth through hole and a sixth through hole located between the fourth through hole and the fifth through hole, and the sixth through hole is a threaded hole; the second guide rail slide module 60 may also include: a second base, the extension direction of the second base is parallel to the plane where the storage plate 110 is located, and the first end of the second base is fixedly connected to the first slide 210; a second lead screw, which is connected to the second slide 610 through the sixth through hole, and the second lead screw extends from one end of the second base to the other end of the second base; a third guide rod, which is connected to the second slide 610 through the fourth through hole, and the third guide rod extends from one end of the second base to the other end of the second base; a fourth guide rod, which is connected to the second slide 610 through the fifth through hole, and the fourth guide rod extends from one end of the second base to the other end of the second base; a second drive module, which is arranged at one end of the second base, the drive end of the second drive module is fixedly connected to one end of the second lead screw, and the second drive module is electrically connected to the controller.

[0035] It should be noted that when the second drive module drives the second lead screw to rotate, the second slide 610 will move left and right, and the movement direction of the second slide 610 can be parallel to the plane of the storage plate 110. Since the camera 30 is disposed on the second slide 610, the movement of the second slide 610 can drive the camera 30. It should also be noted that the rangefinder 40 can be disposed on the second slide 610. In this case, the second slide 610 can drive the camera 30 and the rangefinder 40 to move synchronously, and the relative position of the camera 30 and the rangefinder 40 does not change when the second slide 610 moves. The rangefinder 40 can also be disposed at a fixed position on the second guide rail slide module 60 other than the second slide 610. In this case, the second slide 610 cannot drive the rangefinder 40 to move synchronously, and the relative position of the camera 30 and the rangefinder 40 changes when the second slide 610 moves.

[0036] In some embodiments, the defect identification system for strip steel may further include: a first fill light 70 electrically connected to the controller and disposed on a side of the second slide 610 close to the first slide 210 , with the first fill light 70 facing the storage plate 110 .

[0037] In some embodiments, the defect identification system for strip steel may further include: a second fill light 80, electrically connected to the controller and arranged on a side of the second slide 610 away from the first slide 210, the camera 30 is located between the first fill light 70 and the second fill light 80, and the second fill light 80 faces the storage plate 110.

[0038] In some embodiments, the illumination center axis direction of the first fill light 70 is parallel to the lens orientation of the camera 30, and the angle deviation between the first angle and the second angle is less than a preset angle deviation threshold. The first angle is the angle between the illumination center axis direction of the first fill light 70 and the plane where the storage plate 110 is located, and the second angle is the angle between the illumination center axis direction of the second fill light 80 and the plane where the storage plate 110 is located.

[0039] It should be noted that the first angle and the second angle may be equal.

[0040] In some embodiments, the defect recognition system for strip steel may further include: an image processing device electrically connected to the controller; the controller is further used to: control the first fill light 70 to turn on and the second fill light 80 to turn off after the distance between the camera 30 and the strip steel reaches a preset target distance; control the second slide 610 to move in a first moving direction so that the camera 30 can photograph the strip steel to obtain a first set of images; after obtaining the first set of images, control the first fill light 70 to turn off and the second fill light 80 to turn on; after the first fill light 70 is turned off and the second fill light 80 is turned on, control the second slide 610 to move in a second moving direction so that the camera 30 can photograph the strip steel to obtain a second set of images, and the second moving direction is opposite to the first moving direction; control the image processing device to process the first set of images and the second set of images to obtain defect information of the strip steel.

[0041] In some embodiments, the process of controlling the second slide 610 to move in the first moving direction so that the camera 30 can capture the steel strip to obtain the first set of images can include: controlling the camera 30 to capture one image each time the second slide 610 moves a preset distance in the first moving direction, thereby obtaining the first set of images. The process of controlling the second slide 610 to move in the second moving direction so that the camera 30 can capture one image each time the second slide 610 moves a preset distance in the second moving direction, thereby obtaining the second set of images.

[0042] In some embodiments, controlling the image processing device to process the first group of images and the second group of images to obtain defect information of the steel strip includes: controlling the image processing device to process the first group of images to obtain first defect information of the steel strip; controlling the image processing device to process the second group of images to obtain second defect information of the steel strip; filtering out duplicate information in the first defect information of the steel strip and the second defect information of the steel strip to obtain defect information of the steel strip.

[0043] It should be noted that if there is reflection at the strip position in the first set of images, there is no reflection at the strip position in the second set of images. The reason is explained below: the first set of images was acquired with the first fill light 70 on and the second fill light 80 off, while the second set of images was acquired with the first fill light 70 off and the second fill light 80 on. Furthermore, since the illumination axis of the first fill light 70 is parallel to the lens orientation of the camera 30, and the angular deviation between the first angle and the second angle is less than a preset angular deviation threshold, it can be determined that the first and second sets of images have opposite fill light conditions. Therefore, there are no strip positions with simultaneous reflections in the first and second sets of images. Since there are no strip positions with simultaneous reflections in the first and second sets of images, the first and second sets of images can accurately reflect defect information. The image processing device is then controlled to process the first and second sets of images to obtain strip defect information, avoiding the omission of defect information due to reflections and thereby improving the accuracy of strip defect identification.

[0044] In some embodiments, the defect identification system for strip steel may further include: a third guide rail slide module 90, which is electrically connected to the controller and is arranged on the second inner wall of the shell 10, the second inner wall is opposite to the first inner wall, and the extension direction of the third guide rail slide module 90 is from the bottom of the shell 10 to the top of the shell 10, the first guide rail slide module 20, the second guide rail slide module 60 and the third guide rail slide module 90 are located in the same plane; the third guide rail slide module 90 includes a third slide 910, and the second end of the second guide rail slide module 60 is fixedly connected to the third slide 910; the controller is also used to: based on the detection distance and the preset target distance, control the first slide 210 and the third slide 910 to move synchronously so that the distance between the camera 30 and the strip steel reaches the preset target distance.

[0045] refer to Figure 4 As shown, Figure 4This is a third schematic diagram of the defect recognition system for strip steel in an embodiment of the present invention. It should be noted that the second guide rail slide module 60 can be driven to move up and down only by the first guide rail slide module 20, but there is a problem of poor movement stability, and unilateral fixation is prone to shaking. Therefore, the embodiment of the present invention is provided with a third guide rail slide module 90, and the second guide rail slide module 60 is driven to move up and down by the third guide rail slide module 90 and the first guide rail slide module 20 at the same time, thereby improving the movement stability of the camera 30, avoiding shaking, and improving the clarity of the image captured by the camera 30.

[0046] It should be noted that the structures of the first guide rail slide module 20, the second guide rail slide module 60 and the third guide rail slide module 90 are similar and can be referred to. Figure 2 shown.

[0047] In some embodiments, the third slide 910 includes a seventh through hole, an eighth through hole and a ninth through hole located between the seventh through hole and the eighth through hole, and the ninth through hole is a threaded hole; the third guide rail slide module 90 may also include: a third base, the extension direction of the third base is from the bottom of the shell 10 to the top of the shell 10; a third lead screw, which is connected to the third slide 910 through the ninth through hole, and the third lead screw extends from one end of the third base to the other end of the third base; a fifth guide rod, which is connected to the third slide 910 through the seventh through hole, and the fifth guide rod extends from one end of the third base to the other end of the third base; a sixth guide rod, which is connected to the third slide 910 through the eighth through hole, and the sixth guide rod extends from one end of the third base to the other end of the third base; a third drive module, which is arranged at one end of the third base, the drive end of the third drive module is fixedly connected to one end of the third lead screw, and the third drive module is electrically connected to the controller.

[0048] In some embodiments, the defect identification system for strip steel may further include: an object sensing device 91, which is arranged on the placement plate 110 and is electrically connected to the controller; the controller is also used to: obtain the detection signal of the object sensing device 91 before obtaining the detection distance of the rangefinder 40; and determine whether there is strip steel placed on the placement plate 110 based on the detection signal.

[0049] It should be noted that the object sensing device 91 may perform detection by distance measurement, and the detection signal in this case is the distance.

[0050] It should be noted that the camera 30 may include a lens and an IO control interface. The controller may be divided into a PLC control unit and an encoder unit, wherein the PLC control unit is used to control the drive module, and the encoder unit may be connected to the IO control interface to control the camera 30. The image processing device may include a GPU image processing unit, a data communication unit, and a graphic display unit. The defect recognition system for the strip steel may further include a power supply device, which may include a power input module and a power output distribution module, and the power output distribution module is electrically connected to the camera 30, the drive module, the controller, the rangefinder 40, the object sensing device 91, and the image processing device. The defect information of the strip steel may include defect size, defect location, defect type, and the like. After completing the identification and location of the surface defects of the strip steel, an image of the strip steel surface containing defect markings may be displayed in the graphic display unit to meet the needs of strip steel surface defect recognition, defect size calculation, quality judgment and classification, etc. in the metallurgical industry. The embodiments of the present invention can realize the identification of surface defects of steel strips in complex environments, solve the problem that different reflectivity of the surfaces of steel strips of different materials affects defect identification, and the problem that changes in strip thickness affect the error in defect size calculation, and meet the needs of steel strip surface defect identification, defect size calculation, quality judgment and classification in the metallurgical industry.

[0051] The defect recognition system for strip steel provided in an embodiment of the present invention comprises: a housing 10, wherein a storage plate 110 is provided at the bottom of the housing 10; a first guide rail slide module 20, which is provided on the first inner side wall of the housing 10, and the first guide rail slide module 20 includes a first slide 210, and the first guide rail slide module 20 extends from the bottom of the housing 10 to the top of the housing 10; a camera 30, which faces the storage plate 110 and is mechanically connected to the first slide 210; a rangefinder 40, which faces the storage plate 110 and is mechanically connected to the first slide 210; The storage plate 110 is mechanically connected to the first slide 210, and the first slide 210 can drive the rangefinder 40 and the camera 30 to move synchronously; the controller is electrically connected to the rangefinder 40, the first guide rail slide module 20, and the camera 30. The controller is used to: obtain the detection distance of the rangefinder 40 when a steel strip is placed on the storage plate 110; based on the detection distance and the preset target distance, control the movement of the first slide 210 to make the distance between the camera 30 and the steel strip reach the preset target distance. Due to the provision of the first guide rail slide module 20, the camera 30 can move up and down to adjust the distance between the camera 30 and the steel strip, thereby placing the camera 30 at the optimal shooting height, which can improve the clarity of the image captured by the camera 30, thereby avoiding the problem of defect information errors caused by unclear images. Furthermore, when the image processing device processes an image, if the image processing device has preset the area size represented by each pixel in the image, the area size represented by each pixel will vary depending on the camera 30's position at different heights. Therefore, the distance between the camera 30 and the steel strip must be adjusted to the preset target distance so that the pixels in the image captured by the camera 30 match the preset conditions of the image processing device. This prevents the defect size determined in the image from being inconsistent with the actual defect size. This improves the accuracy of the steel strip defect information.

[0052] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A strip steel defect recognition system, characterized in that: include: A housing, wherein a storage plate is provided at the bottom of the housing; a first guide rail slide module, disposed on a first inner side wall of the housing, the first guide rail slide module including a first slide, and extending from the bottom of the housing to the top of the housing; a camera, facing the storage plate and mechanically connected to the first slide; a rangefinder facing the storage plate and mechanically connected to the first slide, wherein the first slide is capable of driving the rangefinder and the camera to move synchronously; A controller is electrically connected to the rangefinder, the first guide rail slide module and the camera, and is used to: obtain the detection distance of the rangefinder when a steel strip is placed on the storage plate; and control the first slide to move based on the detection distance and a preset target distance so that the distance between the camera and the steel strip reaches the preset target distance.

2. The strip steel defect recognition system according to claim 1, characterized in that: Also includes: A connecting block is arranged inside the shell, one end of the connecting block is fixedly connected to the first slide, and the camera and the rangefinder are arranged on the connecting block.

3. The strip steel defect recognition system according to claim 1, characterized in that: Also includes: The second guide rail slide module is electrically connected to the controller, the extension direction of the second guide rail slide module is parallel to the plane where the storage plate is located, and the first end of the second guide rail slide module is fixedly connected to the first slide; the second guide rail slide module includes a second slide, and the camera is set on the second slide.

4. The strip steel defect recognition system according to claim 3, characterized in that: Also includes: The first fill light is electrically connected to the controller and is disposed on a side of the second slide close to the first slide, with the first fill light facing the storage plate.

5. The strip steel defect recognition system according to claim 4, characterized in that: Also includes: A second fill light is electrically connected to the controller and is disposed on a side of the second slide away from the first slide. The camera is located between the first fill light and the second fill light, and the second fill light faces the storage plate.

6. The strip steel defect recognition system according to claim 5, characterized in that: The illumination center axis direction of the first fill light is parallel to the lens direction of the camera, and the angle deviation between the first angle and the second angle is less than a preset angle deviation threshold. The first angle is the angle between the illumination center axis direction of the first fill light and the plane where the storage plate is located, and the second angle is the angle between the illumination center axis direction of the second fill light and the plane where the storage plate is located.

7. The strip steel defect recognition system according to any one of claims 5 or 6, characterized in that: Also includes: An image processing device is electrically connected to the controller; the controller is further configured to: After the distance between the camera and the steel strip reaches the preset target distance, controlling the first fill light to turn on and the second fill light to turn off; controlling the second slide to move in a first moving direction so that the camera photographs the steel strip to obtain a first set of images; After obtaining the first group of images, controlling the first fill light to turn off and the second fill light to turn on; After the first fill light is turned off and the second fill light is turned on, controlling the second slide to move in a second moving direction so that the camera captures the steel strip to obtain a second set of images, the second moving direction being opposite to the first moving direction; The image processing device is controlled to process the first set of images and the second set of images to obtain defect information of the steel strip.

8. The strip steel defect recognition system according to any one of claims 3 to 6, characterized in that: Also includes: a third guide rail slide module electrically connected to the controller and disposed on a second inner sidewall of the housing, the second inner sidewall being opposite to the first inner sidewall; the third guide rail slide module extending from the bottom of the housing to the top of the housing; the first guide rail slide module, the second guide rail slide module, and the third guide rail slide module being located in the same plane; the third guide rail slide module including a third slide; a second end of the second guide rail slide module being fixedly connected to the third slide; The controller is further used to: based on the detection distance and the preset target distance, control the first slide and the third slide to move synchronously so that the distance between the camera and the strip reaches the preset target distance.

9. The strip steel defect recognition system according to any one of claims 1 to 6, characterized in that: Also includes: an object sensing device, disposed on the storage plate and electrically connected to the controller; The controller is further configured to: obtain a detection signal from the object sensing device before obtaining the detection distance of the rangefinder; and determine whether a steel strip is placed on the storage plate based on the detection signal.

10. The strip steel defect recognition system according to any one of claims 1 to 6, characterized in that: The distance between the rangefinder and the storage plate is equal to the distance between the camera and the storage plate.

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