Plate detection equipment combining dynamic detection and static detection

Abstract

The invention discloses dynamic detection and static detection combined plate detection equipment, which comprises an equipment main frame and a base bracket, a working bin is arranged at the upper part of the equipment main frame, the base bracket penetrates through the lower part of the equipment main frame, a conveying belt is fixedly arranged on the base bracket, the working bin is arranged above the conveying belt, and the working bin is arranged above the conveying belt. The lower part of the working bin is sequentially and fixedly provided with a first camera assembly for shooting images of the front side surfaces of the plates and a second camera assembly for shooting images of the rear side surfaces of the plates in the plate conveying direction from front to back; the top of the working bin is fixedly provided with a long sliding table assembly horizontally and linearly sliding in the conveying direction and a first servo motor driving the long sliding table assembly to linearly move. A sliding part of the long sliding table assembly is fixedly connected with a fifth camera assembly used for shooting images of the top faces of the plates and a fifth light source assembly used for supplementing light to the top faces of the plates during shooting.

Description

Technical Field

[0001] The present invention belongs to the field of visual inspection technology, and in particular relates to plate inspection technology equipment, specifically a plate six-side dynamic inspection system. Background Art

[0002] With the development and maturity of random machine vision inspection technology, the detection of plate size and defects through machine vision has become a development trend in the field of plate inspection technology. In traditional plate inspection technology, the inspection of plates includes the front and back surfaces of the plates. However, the plates are hexahedral structures, and there may be defects on each surface of the plates. Traditional inspection machines can only meet the requirements of double-sided inspection, but cannot observe the six surfaces of the plates. Patent CN107966102A discloses a six-sided inspection device for plate production, which sets CCD cameras at corresponding positions on the front, back, top, bottom, left, and right sides of the plate to obtain images of the six surfaces of the plate, and then obtain the contour parameters of the plate by calculation. However, this patent is a static detection method, that is, when the upper and lower surfaces of the plate are detected, the conveyor belt 31-5 stops running and the plate is stationary. This results in that when the CCD cameras on the upper, lower, left and right sides are fixedly set in the middle position of the belt conveyor mechanism, during the image acquisition process, since the distance between the CCD camera and the plate and the relative position with the plate are fixed, the shooting range of the CCD camera is limited. When the length of the plate is long, the image obtained by the CCD camera cannot cover the entire surface of the plate, resulting in a detection blind spot, and the obtained parameters are prone to deviation values. Chinese patent CN 112362667 A discloses an improved six-sided detection device for plate production, which uses a four-sided rotating detection mechanism to drive the camera to achieve the purpose of detecting the four surfaces of the plate with a single camera, thereby reducing costs. When these two devices detect the plate, the plate is static. Static detection of the plate is conducive to image capture and has high image accuracy, but its disadvantage is that it causes low plate detection efficiency. In the process of plate detection, both plate detection accuracy and detection efficiency must be taken into account. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that when current equipment detects plates, the plates are all static, resulting in low plate detection efficiency and failure to meet plate detection requirements.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a plate detection equipment combining dynamic inspection and static inspection, characterized in that it includes a main frame of the equipment and a base bracket, the upper part of the main frame of the equipment is provided with a working chamber, the base bracket runs through the lower part of the main frame of the equipment, a conveyor belt is fixedly provided on the base bracket, the working chamber is arranged above the conveyor belt, and the lower part of the working chamber is fixedly provided with a first camera assembly for shooting the front side image of the plate and a second camera assembly for shooting the rear side image of the plate in sequence along the plate conveying direction, a first light source assembly for filling light for the front side of the plate when shooting is fixedly provided next to the first camera assembly, and a second light source assembly for filling light for the front side of the plate when shooting is fixedly provided next to the second camera assembly, a long slide assembly that slides horizontally and linearly along the conveying direction and a first servo motor that drives the long slide assembly to move linearly are fixedly provided on the top of the working chamber, and the sliding part of the long slide assembly is fixedly connected with a fifth camera assembly for shooting the top surface image of the plate and a fifth light source assembly for filling light for the top surface of the plate when shooting.

[0005] Furthermore, the fifth camera assembly includes a slide mounting frame, a first linear module, a second servo motor, an angle adjuster, a camera seat and a line scan camera, the upper portion of the slide mounting frame is fixedly mounted on the sliding portion of the long slide assembly, the first linear module is vertically mounted on the slide mounting frame and its moving portion can move up and down, the second servo motor is fixedly connected to the first linear module, the moving portion of the first linear module is fixedly connected to the angle adjuster through a connecting plate, the angle adjuster is fixedly connected to the camera seat through a connecting plate, and the line scan camera is fixed to the connecting camera seat; the fifth light source assembly is fixedly mounted on the lower portion of the slide mounting frame and its height is lower than that of the line scan camera. The height and angle can be adjusted to ensure the best distance between the camera and the plate, thereby improving the applicability and practicality of the equipment.

[0006] Furthermore, the fifth light source assembly includes a rotating connector and a light source unit, a rotating connector is installed on each side of the light source unit, and the light source unit is horizontally connected to the lower part of the slide mounting frame through the two rotating connectors, and the rotating connector is used to adjust the fill light angle of the light source unit. Furthermore, the working chamber is divided into two working chamber sections according to its functions, wherein the first working chamber section is used to install the fifth camera assembly for capturing the top surface image of the plate, and the second working chamber section is used to install the first camera assembly and the second camera assembly for capturing the front and back side images of the plate, in order to realize dynamic and static line scanning imaging in different chamber sections to complete the detection task.

[0007] Furthermore, a second linear module and a third servo motor driving the second linear module are fixedly arranged in the working chamber, the moving part of the second linear module can move horizontally along the width direction of the plate and is fixedly connected with a third camera assembly and a third light source assembly for photographing one side image of the plate; a fourth camera assembly and a fourth light source assembly for photographing another side image of the plate are fixedly connected to the fixed part on one side of the conveyor belt. The purpose of line scanning imaging and detection of the front, back, left, and right sides of the plate can be achieved.

[0008] Compared with the prior art, the beneficial effect of the present invention is that the conveyor belt of the device stops running only when detecting the top surface of the plate, and the plate remains static to achieve the goal of high-precision imaging of the top surface of the plate, while the conveyor belt does not stop moving when detecting the front, back, left and right sides of the plate, and the plate is in a dynamic state. Therefore, while ensuring the accuracy of plate size detection, the efficiency of multi-side detection of the plate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0010] Figure 2 It is a partial enlarged view of the present invention.

[0011] Figure 3 This is the installation diagram of the fifth camera assembly of the present invention.

[0012] Figure 4 It is a schematic structural diagram of the fifth camera assembly of the present invention.

[0013] Figure 5 Schematic diagram of the structure of the third camera assembly of the present invention.

[0014] Figure 6 Schematic diagram of the structure of the fourth camera assembly of the present invention. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. In this embodiment, the directions such as "up", "down", "left", "right", "front", and "back" mentioned are understood in terms of the drawings in the specification or the actual working posture of the equipment. The definitions of "first, second", etc. do not refer to quantities, but are used to distinguish different components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0016] The front in this embodiment is the direction in which the plates are transported out, and the rear in this embodiment is the direction in which the plates are transported in. This embodiment is understood by referring to this direction standard.

[0017] Existing plate detection equipment detects plates when the plates are static, resulting in low plate detection efficiency and failing to meet plate detection efficiency requirements. This embodiment aims to provide a plate detection equipment that combines dynamic detection and static detection to improve plate detection efficiency while taking into account detection accuracy.

[0018] Example 1, Reference Figure 1-Figure 6 , a plate inspection device combining dynamic inspection and static inspection, comprising a main frame 1 and a base bracket 2. The main frame 1 is constructed of steel materials of various shapes. The main frame 1 needs to ensure that its structure has sufficient strength and stability to ensure stable operation of the installed equipment parts. The upper part of the main frame 11 of the device has a working chamber, which is used to install equipment parts and provide space for plate inspection. In this embodiment, the working chamber is divided into two front and rear working chamber sections according to function, wherein the first working chamber section 1-1 is used to install camera components and supporting components for shooting images of the top surface of the plate, and the second working chamber section 1-2 is used to install camera components and supporting components for shooting images of the front and rear sides of the plate. The lower part of the main frame 1 of the device has a clearance channel, and the base bracket 2 runs through the clearance channel of the lower part of the main frame 1 of the device. A conveyor belt 3 is fixedly provided on the base bracket 2. The working chamber is arranged above the conveyor belt 3. The lower part of the working chamber is fixedly provided with a first camera component 7 for shooting images of the front and side surfaces of the plate and a second camera component 7 for shooting images of the rear of the plate in sequence along the plate conveying direction. The second camera assembly 8 for the side image is fixedly provided with a first light source assembly for supplementing the front and side light of the plate when shooting next to the first camera assembly 7. The first camera assembly 7, the second camera assembly 8, the first light source assembly and the second light source assembly are all installed in the second working chamber section 1-2. The better installation method is: it includes two connecting rods, one connecting rod is fixedly installed on the front side of the main frame 1 of the equipment along the left and right directions, and two first camera brackets are installed on the same connecting rod, and the first camera assembly 7 is installed on each first camera bracket; the other connecting rod is fixedly installed on the rear side of the main frame 1 of the equipment along the left and right directions, and two second camera brackets are installed on the same connecting rod, and the second camera assembly 8 is installed on each second camera bracket. This installation method can achieve the purpose of detecting plates with a larger width. The first camera assembly 7 and the second camera assembly 8 perform dynamic line scanning imaging on the front and rear sides of the plate in the second working chamber section 1-2. Preferably, the first camera assembly 7 and the first light source assembly are integrated equipment, and the second camera assembly 8 and the second light source assembly are integrated equipment. Both use camera assemblies with their own light sources, which can simplify the structure and have a high degree of intelligence.

[0019] A long slide assembly 4 that slides horizontally and linearly along the conveying direction and a first servo motor 5 that drives the long slide assembly 4 to move linearly are fixedly provided on the top of the working bin. The sliding portion of the long slide assembly 4 is fixedly connected with a fifth camera assembly 6 for capturing the image of the top surface of the plate and a fifth light source assembly for supplementing the top surface of the plate during shooting. Specifically, the long slide assembly 4, the fifth camera assembly 6 and the fifth light source assembly are all installed in the first working bin section 1-1, and static line scanning imaging of the plate is performed in the first working bin section 1-1. Since the first working bin section 1-1 is installed with a heavy long slide assembly 4 and a first servo motor 5, the frame of the first working bin section 1-1 should adopt a gantry structure as much as possible to ensure that the frame strength of the first working bin section 1-1 is large enough to ensure reliable and stable operation of the equipment.

[0020] In this embodiment, in the second working bin section, the first camera assembly 7 and the second camera assembly 8 are fixed, and the conveyor belt 3 drives the plate to move. The first camera assembly 7 and the second camera assembly 8 perform dynamic line scanning imaging of the front and rear sides of the plate during the plate conveying process. In the second working bin section, the conveyor belt 3 stops running, and the plate remains stationary on the conveyor belt 3; driven by the first servo motor 5, the long slide assembly 4 performs a long-distance horizontal movement along the conveying direction, which drives the fifth camera assembly 6 and the fifth light source assembly to move synchronously, and the fifth light source assembly synchronously provides fill light, and the fifth camera assembly 6 moves from the front side of the plate to the back side of the plate to perform static line scanning imaging of the top surface of the plate. This device stops running only when the conveyor belt 3 is detecting the top surface of the plate, and does not stop moving when detecting the front and rear sides of the plate. Therefore, while ensuring the accuracy of plate size detection, the efficiency of multi-side detection of the plate is improved.

[0021] More preferably, the fifth camera assembly 6 includes a slide mounting frame 6-4, a first linear module 6-1, a second servo motor 6-3, an angular position adjuster 6-2, a camera seat 6-5 and a line scan camera 6-6, the upper portion of the slide mounting frame 6-4 is fixedly mounted on the sliding portion of the long slide assembly 4, the first linear module 6-1 is vertically mounted on the slide mounting frame 6-4 and its moving portion can move up and down, the second servo motor 6-3 is fixedly connected to the first linear module 6-1, the moving portion of the first linear module 6-1 is fixedly connected to the angular position adjuster 6-2 via a connecting plate, the angular position adjuster 6-2 is fixedly connected to the camera seat 6-5 via a connecting plate, and the line scan camera 6-6 is fixed on the connecting camera seat 6-5; the fifth light source assembly is fixedly mounted on the lower portion of the slide mounting frame 6-4 and its height is lower than that of the line scan camera, the slide mounting frame 6-4 is formed by connecting a plurality of metal parts of different shapes, and the structure should be ensured to have sufficient strength to ensure the stability and durability of the line scan module. The height of the line scan camera can be adjusted by the up and down movement of the first linear module 6-1, and the angle of the line scan camera can be adjusted by the angle adjuster 6-2. The angle adjuster is a manual arc angle table, which is an existing technology to ensure that the line scan mechanism can perform plate inspection for different situations and different types of plates, thereby improving the applicability of the equipment.

[0022] More preferably, the fifth light source assembly includes a rotating connector 6-7 and a light source unit 6-8, a rotating connector 6-7 is installed on both sides of the light source unit 6-8, and the light source unit 6-8 is horizontally connected to the lower part of the slide mounting frame 6-4 through two rotating connectors 6-7. The rotating connector 6-7 is conventional technology, and the rotating connector 6-7 is used to adjust the fill light angle of the light source unit 6-8.

[0023] Embodiment 2: Based on Embodiment 1, a second linear module 10-1 and a third servo motor driving the second linear module 10-1 are fixedly provided in the working chamber, and are specifically provided in the second working chamber section; the moving part of the second linear module 10-1 can move horizontally along the width direction of the plate and is fixedly connected with a third camera assembly 10 and a third light source assembly 10-4 for photographing a side image of the plate; a fourth camera assembly 9 and a fourth light source assembly 9-3 for photographing another side image of the plate are fixedly connected to the fixed part on one side of the conveyor belt 3. Specifically, the main frame 1 of the equipment fixes the second linear module 10-1 through a crane arm, the moving part of the second linear module 10-1 can move horizontally along the width direction of the plate and is fixedly connected with a third camera assembly 10 for photographing a side image of the plate through a third camera bracket 10-2, and the third camera bracket 10-2 is connected with a third light source assembly 10-4 through a first light source bracket 10-3. The fixed part on one side of the conveyor belt 3 is connected to a fourth camera assembly 9 for photographing the other side of the plate through a fourth camera bracket 9-1, and the fourth camera bracket 9-1 is connected to a fourth light source assembly 9-3 through a second light source bracket 9-2.

[0024] In this example, the fourth camera assembly 9 is fixed, and line scanning imaging is performed on one side of the plate being calibrated. When the plate is calibrated, the distance between the fourth camera assembly 9 and the side changes very little, and the line scanning camera generally has a certain wide angle and automatic focusing function. When the distance changes little, the fourth camera can be fixed without affecting the accuracy of the detection. The other side of the plate will change with the model of the plate, and the distance between the side of the plate and the third camera assembly 10 will change. This change exceeds the wide angle range and focusing distance of the camera. Therefore, the system will drive the third servo motor according to the instruction, and the third servo motor drives the second linear module 10-1 to move horizontally left and right, adjust the distance between the third camera assembly 10 and the side of the plate, and always maintain the best line scanning distance to ensure the accuracy of the detection.

[0025] In this embodiment, in the second warehouse section, the first camera assembly 7, the second camera assembly 8, the third camera assembly 10 and the fourth camera assembly 9 are fixed, and the conveyor belt 3 drives the plate to move. The first camera assembly 7, the second camera assembly 8, the third camera assembly 10 and the fourth camera assembly 9 perform dynamic line scanning imaging of the front, back, left and right sides of the plate during the plate conveyance process.

[0026] In the present application, the division method of the working compartment is not limited to embodiment one and embodiment two. The division of the working compartment is mainly to allow the dynamic detection components to be integrated and installed together and the static detection components to be integrated and installed together, to complete the detection goals in their respective working areas, to simplify the structure of the equipment main frame 1 and the zero firmware installation, and to make the plate detection process more efficient.

[0027] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of this template.

[0028] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A plate inspection device combining dynamic inspection and static inspection, characterized in that: The invention comprises an equipment main frame and a base bracket, wherein the upper portion of the equipment main frame is provided with a working chamber, the base bracket passes through the lower portion of the equipment main frame, a conveyor belt is fixedly provided on the base bracket, the working chamber is arranged above the conveyor belt, and the lower portion of the working chamber is fixedly provided with a first camera assembly for photographing the front and side images of the plate and a second camera assembly for photographing the rear and side images of the plate in sequence front and back along the conveying direction of the plate, a first light source assembly for supplementing the front and side images of the plate when photographing is fixedly provided next to the first camera assembly, a second light source assembly for supplementing the front and side images of the plate when photographing is fixedly provided next to the second camera assembly, a long slide assembly for horizontally and linearly sliding along the conveying direction and a first servo motor for driving the long slide assembly for linear motion are fixedly provided on the top of the working chamber, and a fifth camera assembly for photographing the top surface image of the plate and a fifth light source assembly for supplementing the top surface of the plate when photographing are fixedly provided on the sliding portion of the long slide assembly 2. A plate inspection device combining dynamic inspection and static inspection as claimed in claim 1, characterized in that: The fifth camera assembly includes a slide mounting frame, a first linear module, a second servo motor, an angular position adjuster, a camera seat and a line scan camera. The upper part of the slide mounting frame is fixedly mounted on the sliding part of the long slide assembly. The first linear module is vertically mounted on the slide mounting frame and its moving part can move up and down. The second servo motor is fixedly connected to the first linear module. The moving part of the first linear module is fixedly connected to the angular position adjuster through a connecting plate. The angular position adjuster is fixedly connected to the camera seat through a connecting plate. The line scan camera is fixed on the connecting camera seat. The fifth light source assembly is fixedly mounted on the lower part of the slide mounting frame and its height is lower than that of the line scan camera.

3. The plate inspection device combining dynamic inspection and static inspection as claimed in claim 2, characterized in that: The fifth light source assembly includes a rotating connector and a light source unit. A rotating connector is installed on both sides of the light source unit. The light source unit is horizontally connected to the lower part of the slide mounting frame through two rotating connectors. The rotating connector is used to adjust the fill light angle of the light source unit.

4. The plate inspection device combining dynamic inspection and static inspection as claimed in claim 1, characterized in that: The working chamber is divided into two working chamber sections according to function, wherein the first working chamber section is used to install the fifth camera assembly for capturing the top surface image of the plate, and the second working chamber section is used to install the first camera assembly and the second camera assembly for capturing the front, back and side images of the plate.

5. A plate inspection device combining dynamic inspection and static inspection as described in any one of claims 1 to 4, characterized in that: A second linear module and a third servo motor driving the second linear module are fixedly provided in the working chamber; the moving part of the second linear module can move horizontally along the width direction of the plate and is fixedly connected with a third camera assembly and a third light source assembly for capturing a side image of the plate; a fourth camera assembly and a fourth light source assembly for capturing another side image of the plate are fixedly connected to the fixed part on one side of the conveyor belt.

6. The plate inspection device combining dynamic inspection and static inspection as claimed in claim 5, characterized in that: It includes two connecting rods, one connecting rod is fixedly installed on the front side of the main frame of the device along the left-right direction, two first camera brackets are installed on the same connecting rod, and a first camera assembly is installed on each first camera bracket; the other connecting rod is fixedly installed on the rear side of the main frame of the device along the left-right direction, two second camera brackets are installed on the same connecting rod, and a second camera assembly is installed on each second camera bracket.

7. The plate inspection device combining dynamic inspection and static inspection as claimed in claim 5, characterized in that: The main frame of the equipment fixes the second linear module through a crane arm. The moving part of the second linear module can move horizontally along the width direction of the plate and is fixedly connected to a third camera assembly for capturing a side image of the plate through a third camera bracket. The third camera bracket is connected to a third light source assembly through the first light source bracket.

8. The plate inspection device combining dynamic inspection and static inspection as claimed in claim 5, characterized in that: The fixed part on one side of the conveyor belt is connected to a fourth camera assembly for photographing the other side of the plate through a fourth camera bracket, and the fourth camera bracket is connected to a fourth light source assembly through a second light source bracket.

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