Plate detection equipment combining dynamic detection and static detection

Abstract

The utility model discloses plate detection equipment combining dynamic detection and static detection, 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 utility model belongs to the technical field of visual detection, in particular to plate detection technical equipment, specifically a six-side dynamic detection system for a plate. Background Art

[0002] With the development and maturity of random machine vision inspection technology, the use of machine vision to detect plate dimensions and defects has become a development trend in the field of plate inspection technology. In traditional plate inspection technology, plate inspection includes inspection of both the front and back surfaces of the plate. However, plates are hexahedral structures, and defects may exist on each surface of the plate. Traditional inspection machines can only meet the requirements of double-sided inspection and cannot observe all six surfaces of the plate. Patent CN107966102A discloses a six-sided inspection device for plate production. The device uses CCD cameras installed at corresponding positions on the front, back, top, bottom, left, and right sides of the plate to capture images of the six surfaces of the plate, and then calculate the plate's contour parameters. 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 the CCD cameras on the upper, lower, left and right sides being 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 acquired 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 112362667A discloses an improved six-sided detection device for plate production. The device 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 high image accuracy, but its disadvantage is that it causes low plate detection efficiency. During the plate detection process, both plate detection accuracy and detection efficiency must be taken into account. Summary of the Invention

[0003] The utility model aims 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 inspection equipment that combines 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 passes 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 fixed with a first camera assembly for capturing the front and side images of the plate and a second camera assembly for capturing the rear side images of the plate in sequence along the plate conveying direction, a first light source assembly for filling light for the front and side of the plate when shooting is fixed next to the first camera assembly, and a second light source assembly for filling light for the front and side of the plate when shooting is fixed 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 fixed 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 capturing 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 mount, 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 movable portion can move up and down. The second servo motor is fixedly connected to the first linear module. The movable portion of the first linear module is fixedly connected to the angle adjuster via a connecting plate. The angle adjuster is fixedly connected to the camera mount via a connecting plate. The line scan camera is fixed to the connecting camera mount. 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 optimal distance between the camera and the plate, improving the applicability and practicality of the equipment.

[0006] Furthermore, the fifth light source assembly includes a rotating connector and a light source unit, with a rotating connector installed on each side of the light source unit. The light source unit is horizontally connected to the lower part of the slide mounting frame via 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 function, wherein the first working chamber section is used to install the fifth camera assembly for capturing images of the top surface of the plate, and the second working chamber section is used to install the first camera assembly and the second camera assembly for capturing images of the front, back and side surfaces of the plate. This is to enable dynamic and static line scanning imaging in different chamber sections to complete the inspection task.

[0007] Furthermore, a second linear module and a third servo motor driving the second linear module are fixedly installed in the working chamber. The moving portion of the second linear module can move horizontally along the width of the plate and is fixedly connected to a third camera assembly and a third light source assembly for capturing an image of one side of the plate. A fourth camera assembly and a fourth light source assembly are fixedly connected to a fixed portion on one side of the conveyor belt for capturing an image of the other side of the plate. This allows for line scanning imaging and inspection of the front, back, left, and right sides of the plate.

[0008] Compared with the existing technology, 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, so as to achieve the goal of high-precision imaging of the top surface of the plate. When detecting the front, back, left and right sides of the plate, the conveyor belt does not stop moving, 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 utility model.

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

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

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

[0013] Figure 5 This is a schematic structural diagram of the third camera assembly of the present invention.

[0014] Figure 6 This is a structural schematic diagram 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. In this embodiment, the directions such as "up", "down", "left", "right", "front", and "back" mentioned are to be 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 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 can be understood by referring to this direction standard.

[0017] Existing plate detection equipment detects plates at a static state, resulting in low plate detection efficiency and failure 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 Figures 1-6 A plate inspection device that combines dynamic inspection and static inspection includes a device main frame 1 and a base bracket 2. The device main frame 1 is constructed of steel materials of various shapes. The device 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 device main frame 11 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 back sides of the plate. The lower part of the device main frame 1 has a makeshift channel, and the base bracket 2 passes through the makeshift channel of the lower part of the device main frame 1. 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 fixed with a first camera component 7 for shooting images of the front and side surfaces of the plate and a camera component 7 for shooting images of the back of the plate in sequence along the plate conveying direction. The second camera assembly 8 for side images is fixedly mounted next to the first camera assembly 7, with a first light source assembly for supplementary lighting the front and side surfaces of the plate during photography. The first camera assembly 7, second camera assembly 8, first light source assembly, and second light source assembly are all mounted within the second working chamber section 1-2. A preferred installation method includes two connecting rods: one fixedly mounted horizontally on the front side of the main frame 1 of the device, with two first camera brackets mounted on the same connecting rod, each mounted with the first camera assembly 7; and another connecting rod fixedly mounted horizontally on the rear side of the main frame 1 of the device, with two second camera brackets mounted on the same connecting rod, each mounted with a second camera assembly 8. This installation method allows for the inspection of plates of wider widths. The first and second camera assemblies 7 and 8 perform dynamic line scan imaging of the front and back sides of the plate within the second working chamber section 1-2. Preferably, the first camera assembly 7 and first light source assembly are integrated, and the second camera assembly 8 and second light source assembly are integrated, each employing a camera assembly with its own light source, which simplifies the structure and increases the level 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 light to 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 is performed on the plate in the first working bin section 1-1. Since the heavy long slide assembly 4 and the first servo motor 5 are installed in the first working bin section 1-1, 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, within the second working chamber section, the first camera assembly 7 and the second camera assembly 8 are stationary, 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 back sides of the plate during the plate conveying process. Within the second working chamber section, the conveyor belt 3 stops, 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. The fifth light source assembly provides fill light synchronously, 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 only stops the conveyor belt 3 when detecting the top surface of the plate, and does not stop when detecting the front and back sides of the plate. Therefore, while ensuring the accuracy of the 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 adjuster 6-2, a camera seat 6-5 and a line scan camera 6-6, the upper part of the slide mounting frame 6-4 is fixedly mounted on the sliding part 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 part can move up and down, the second servo motor 6-3 is fixedly connected to the first linear module 6-1, the moving part of the first linear module 6-1 is fixedly connected to the angular adjuster 6-2 through a connecting plate, the angular adjuster 6-2 is fixedly connected to the camera seat 6-5 through 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 part of the slide mounting frame 6-4 and its height is lower than the height of the line scan camera, the slide mounting frame 6-4 is made of a plurality of metal parts of different shapes connected together, 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, and a rotating connector 6-7 is installed on both sides of the light source unit 6-8. 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] Example 2: Based on Example 1, a second linear module 10-1 and a third servo motor driving the second linear module 10-1 are fixedly installed within the work chamber, specifically within the second work chamber section. The movable portion of the second linear module 10-1 is movable horizontally along the width of the plate and is fixedly connected to a third camera assembly 10 and a third light source assembly 10-4 for capturing a side view of the plate. A fourth camera assembly 9 and a fourth light source assembly 9-3 for capturing a side view of the plate are fixedly connected to a fixed portion on one side of the conveyor belt 3. Specifically, the main frame 1 of the equipment secures the second linear module 10-1 via a boom. The movable portion of the second linear module 10-1 is movable horizontally along the width of the plate and is fixedly connected to the third camera assembly 10 for capturing a side view of the plate via a third camera bracket 10-2. The third camera bracket 10-2 is connected to the third light source assembly 10-4 via 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 stationary, performing line scan imaging on one side of the plate being straightened. The distance between this side and the fourth camera assembly 9 varies very little when the plate is straightened. Line scan cameras generally have a wide angle and autofocus capabilities. When the distance varies slightly, the fourth camera assembly can be stationary without affecting detection accuracy. However, the other side of the plate can vary depending on the plate model, causing the distance between this side and the third camera assembly 10 to change. This variation exceeds the camera's wide angle range and focus distance. Therefore, the system drives the third servo motor according to the command, which drives the second linear module 10-1 to move horizontally left and right, adjusting the distance between the third camera assembly 10 and the side of the plate to maintain the optimal line scan distance and ensure detection accuracy.

[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 this 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 description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be pointed out that for ordinary technicians in this technical field, certain improvements and modifications without departing from the principle of the present invention should also be considered as the scope of protection of this template.

[0028] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not 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 application of the present invention.

Claims

1. A plate inspection device combining dynamic inspection and static inspection, characterized in that: The conveyor belt is fixedly mounted on the base bracket of the machine, and the conveyor belt is fixedly mounted on the base bracket. The working warehouse is arranged above the conveyor belt. The lower part of the working warehouse is fixed with a first camera assembly for shooting the front and side images of the plate and a second camera assembly for shooting the rear and side images of the plate in sequence along the conveying direction of the plate. A first light source assembly for filling in the light of the front and side of the plate when shooting is fixed next to the first camera assembly, and a second light source assembly for filling in the light of the front and side of the plate when shooting is fixed 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 fixed on the top of the working warehouse. 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 in the light of the top surface of the plate when shooting.

2. The 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 each side 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 its 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. The plate inspection device combining dynamic inspection and static inspection according to 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 to a third camera assembly and a third light source assembly for capturing an image of one side of the plate; a fourth camera assembly and a fourth light source assembly for capturing an image of the other side 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 and right directions, and 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 and right directions, and 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 boom. 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 portion 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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