High-accuracy packaging box front and back detection equipment based on machine vision

Abstract

The utility model discloses high-accuracy packaging box front and back detection equipment based on machine vision, and particularly relates to the field of packaging box detection, which comprises a conveying unit used for conveying a packaging box; a detection box is fixedly arranged on the conveying unit, a visual detection mechanism is arranged in the detection box and comprises an upper detection probe and a lower detection probe, and the upper detection probe and the lower detection probe are used for detecting the front face and the back face of the packaging box at the same time. The packaging box can be kept in the correct direction and position through the guide mechanism in the conveying process of the packaging box, deviation, dislocation or overturning of the packaging box is avoided, extrusion and deformation are reduced, enough space can be provided in the conveying process of the packaging box through the interval conveying mechanism, and the packaging box can be conveniently conveyed. The packaging boxes are prevented from being extruded or pressed mutually, the possibility that top holes are covered is reduced, and therefore the accuracy in the visual inspection process can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging box detection, and more specifically, to a high-accuracy front and back detection device for packaging boxes based on machine vision. Background Art

[0002] A packaging box is a container used to package, ship and protect goods. It is usually made of cardboard, plastic, metal or wood. It can be customized in different shapes, sizes and structures. Packaging boxes play an important role in the production, transportation, warehousing and sales of goods.

[0003] When packaging some fresh foods, plants or chemicals, current packaging boxes need to have holes in the top of the boxes for ventilation to keep the goods fresh and prevent rotting or mold. During transportation, it is necessary to ensure that the opening side of the box faces upward. Therefore, it is necessary to inspect the front and back of the box to make the opening side of the box face upward, so as to ensure that the opening side of the box faces upward during later packing and transportation. Therefore, visual inspection is usually used in the transportation inspection process. Since the six sides of the box are basically the same, the opening on the box can be identified to accurately detect whether the opening side of the box is facing upward, so as to avoid the problem of the opening side facing downward, which affects ventilation.

[0004] However, when placing boxes for transportation, problems with placement may cause stacking and squeezing of boxes, or collisions between boxes, causing the boxes to be deformed by pressure, and the top openings may be covered or hidden, making it difficult for the visual system to accurately identify the openings. Utility Model Content

[0005] The utility model provides a high-precision packaging box front and back detection device based on machine vision, and aims to solve the following problem: currently, when packaging boxes are placed for transportation, there will be stacking and squeezing between the packaging boxes, causing the packaging boxes to be deformed by pressure squeezing, and the top openings will be covered or hidden, making it difficult for the visual system to accurately identify the openings.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-accuracy front and back detection device for packaging boxes based on machine vision, comprising: a conveying unit, the conveying unit is used to convey the packaging box;

[0007] A detection box is fixedly arranged on the conveying unit, and a visual detection mechanism is arranged in the detection box. The visual detection mechanism includes an upper detection probe and a lower detection probe, and the upper detection probe and the lower detection probe are used to simultaneously detect the front and back sides of the packaging box;

[0008] The conveying unit is provided with a guide mechanism, which includes two guide plates, which are fixedly arranged on the conveying unit and are used to guide the packaging box;

[0009] The guide plate is provided with an interval conveying mechanism, which includes a hinged resistance plate, which is used to provide resistance during the conveying process of the packaging boxes and enables the packaging boxes to be conveyed one by one at intervals.

[0010] In a preferred embodiment, the visual inspection mechanism further includes four transmission rollers, which are rotatably arranged in the inspection box, the conveying unit includes a conveyor belt, the conveyor belt transmission is arranged on the four transmission rollers, and the lower inspection probe is located between the four transmission rollers.

[0011] In a preferred embodiment, the guide mechanism further includes a plurality of guide rollers, side grooves are provided on the adjacent sides of the two guide plates, and the plurality of guide rollers are rotatably disposed in the corresponding side grooves.

[0012] In a preferred embodiment, the interval conveying mechanism further includes a fixed plate, the resistance plate is hinged on the fixed plate, and an elastic member is arranged between the fixed plate and the resistance plate.

[0013] In a preferred embodiment, the front and back detection device also includes an extrusion mechanism, which includes a fixed frame, a sliding frame is slidably arranged in the fixed frame, a linear drive component 1 is installed on the fixed frame, and the linear drive component 1 is used to drive the sliding frame to move linearly. A fixed frame is fixedly installed at the bottom of the sliding frame, and linear drive components 2 are installed on both sides of the fixed frame, and extrusion rollers are installed at the output ends of the two linear drive components 2.

[0014] In a preferred embodiment, the extrusion mechanism further includes a rotary driving member, which is mounted on the detection box, and an output end of the rotary driving member is fixedly connected to the fixing frame.

[0015] The beneficial effects of the utility model are:

[0016] The utility model can use the guiding mechanism to keep the packaging box in the correct direction and position during the transportation of the packaging box, avoid deviation, misalignment or overturning of the packaging box, thereby reducing the occurrence of extrusion and deformation, and can provide sufficient space during the transportation of the packaging box through the spacing conveying mechanism to avoid the packaging boxes from being squeezed or pressed against each other, reduce the possibility of the top opening being covered, and thus ensure the accuracy of the visual inspection process.

[0017] The utility model is provided with an extrusion mechanism, which can squeeze the packaging box whose top opening is reset due to extrusion deformation, so that the covered opening leaks out, thereby ensuring the accuracy of visual detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the main view of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the guide mechanism of the utility model.

[0021] Figure 4 for Figure 1 Enlarged view of part A.

[0022] Figure 5 for Figure 2 Enlarged view of part B.

[0023] The accompanying drawings are marked as follows: 1. conveying unit; 11. conveyor belt; 2. inspection box; 3. visual inspection mechanism; 31. upper inspection probe; 32. lower inspection probe; 33. transmission roller; 4. guide mechanism; 41. guide plate; 42. side groove; 43. guide roller; 5. interval conveying mechanism; 51. fixed plate; 52. resistance plate; 53. elastic member; 6. extrusion mechanism; 61. rotating drive member; 62. fixed frame; 63. sliding frame; 64. linear drive member one; 65. fixed frame; 66. linear drive member two; 67. extrusion roller. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0025] Refer to the instruction manual Figures 1 to 5 , a high-accuracy front and back detection device for a packaging box based on machine vision, comprising: a conveying unit 1, the conveying unit 1 is used to convey the packaging box;

[0026] A detection box 2 is fixedly arranged on the conveying unit 1, and a visual detection mechanism 3 is arranged in the detection box 2. The visual detection mechanism 3 includes an upper detection probe 31 and a lower detection probe 32. The upper detection probe 31 and the lower detection probe 32 are used to simultaneously detect the front and back sides of the packaging box;

[0027] The conveying unit 1 is provided with a guide mechanism 4, which includes two guide plates 41, which are fixedly provided on the conveying unit 1 and are used to guide the packaging box;

[0028] The guide plate 41 is provided with an interval conveying mechanism 5, which includes a hinged resistance plate 52, and the resistance plate 52 is used to provide resistance during the conveying process of the packaging boxes, and to convey the packaging boxes one by one at intervals.

[0029] It should be noted that the conveying unit 1 is a belt conveying mechanism, through which the packaging box is conveyed, and during the conveying process, the front and back sides of the packaging box are detected by the upper detection probe 31 and the lower detection probe 32. The packaging box is a rectangular packaging box. During transportation, the packaging box is placed flat on the conveying unit 1 for transportation. The opening is set on the flat surface of the packaging box. Only the front and back sides of the packaging box need to be detected, and no detection of other surfaces is required. During the transportation of the packaging box, the packaging box is guided by two guide plates 41, so that the packaging box can maintain the correct direction and position during the transportation process to avoid deviation, misalignment or overturning of the packaging box. Rotation, thereby reducing the occurrence of extrusion and deformation, and during the transportation process, the resistance plate 52 is used to increase the resistance during the transportation of the packaging box, but the resistance is less than the force of the packaging box in the horizontal transportation direction, so that when the packaging box contacts the resistance plate 52, the transportation speed of the packaging box can be slowed down. When the packaging box is separated from the resistance plate 52, another packaging box behind the packaging box can contact the resistance plate 52. At this time, the packaging boxes can be separated, so that the packaging boxes have enough space during transportation, avoid being squeezed or pressed against each other, and reduce the possibility of the top opening being covered, thereby ensuring the accuracy of the visual inspection process.

[0030] For further information, please refer to the attached manual. Figure 5 The visual inspection mechanism 3 also includes four transmission rollers 33, which are rotatably arranged in the inspection box 2. The conveying unit 1 includes a conveyor belt 11, which is transmission-arranged on the four transmission rollers 33, and the lower inspection probe 32 is located between the four transmission rollers 33.

[0031] It should be noted that if Figure 5 As shown, the lower detection probe 32 is located between the four driving rollers 33, so that during the transportation of the packaging box, the bottom of the packaging box can be detected by the lower detection probe 32, so that the front and back sides of the packaging box can be detected at the same time without turning the packaging box over.

[0032] Further, refer to the attached manual Figure 3 The guide mechanism 4 further includes a plurality of guide rollers 43 . Side grooves 42 are provided on the adjacent sides of the two guide plates 41 . The plurality of guide rollers 43 are rotatably disposed in the corresponding side grooves 42 .

[0033] It should be noted that the two guide plates 41 are adjusted according to the size of the packaging box to ensure that the packaging box is accurately guided. The packaging box is guided by the two guide plates 41 and a number of guide rollers 43, and during the guiding and conveying process, the friction can be reduced by a number of guide rollers 43 to avoid affecting the conveying of the packaging box.

[0034] For further information, please refer to the attached manual. Figure 4 The interval conveying mechanism 5 also includes a fixed plate 51, a resistance plate 52 is hinged on the fixed plate 51, and an elastic member 53 is arranged between the fixed plate 51 and the resistance plate 52.

[0035] It should be noted that the elastic member 53 is a spring. During the transportation of the packaging box, the packaging box is brought into contact with the resistance plate 52, and the resistance plate 52 increases the resistance during the transportation of the packaging box, but the resistance is smaller than the force of the packaging box in the horizontal transportation direction, so that when the packaging box contacts the resistance plate 52, the resistance plate 52 can be squeezed to rotate, and the resistance plate 52 can squeeze the spring, thereby slowing down the transportation speed of the packaging box. When the packaging box is separated from the resistance plate 52, the resistance plate 52 is reset under the action of the spring, so that another packaging box behind the packaging box can contact the resistance plate 52 and slow down its transportation speed, so that the packaging boxes can be separated and transported to avoid being squeezed or pressed against each other, thereby reducing the possibility of the top opening being covered.

[0036] In the above technical scheme, the packaging boxes are guided and conveyed at intervals during the transportation process to prevent the packaging boxes from being squeezed or pressed against each other, thereby reducing the possibility of the top opening being covered. However, in the process of taking and placing the packaging boxes, the packaging boxes may be squeezed and deformed. For this reason, the utility model also proposes an extrusion mechanism 6, which squeezes the packaging box after the opening is covered due to extrusion and deformation, so as to restore the opening position to a normal shape.

[0037] For details, please refer to the attached manual. Figure 5 The extrusion mechanism 6 includes a fixed frame 62, a sliding frame 63 is slidably arranged inside the fixed frame 62, a linear driving member 64 is installed on the fixed frame 62, and the linear driving member 64 is used to drive the sliding frame 63 to move linearly, a fixed frame 65 is fixedly installed at the bottom of the sliding frame 63, and linear driving members 66 are installed on both sides of the fixed frame 65, and extrusion rollers 67 are installed at the output ends of the two linear driving members 66.

[0038] It should be noted that the linear drive component 1 64 is a hydraulic cylinder and the linear drive component 2 66 is an air cylinder. When the visual inspection mechanism 3 detects that the packaging box is deformed, there may be a problem that the openings on the packaging box are covered. The sliding frame 63 is driven downward by the hydraulic cylinder, and the fixed frame 65 is driven downward. Then the two air cylinders are driven to drive the two squeezing rollers 67 to move closer to each other, so that the two squeezing rollers 67 squeeze the deformed part of the packaging box, thereby allowing the covered openings to leak out.

[0039] For further information, please refer to the attached manual. Figure 5 The extrusion mechanism 6 further includes a rotary driving member 61 , which is mounted on the detection box 2 , and an output end of the rotary driving member 61 is fixedly connected to a fixing frame 62 .

[0040] It should be noted that the rotating drive member 61 is a motor. When it is detected that the packaging box is squeezed and deformed in the left and right directions, it is necessary to squeeze and restore the packaging box front and back. The fixed frame 62 is driven by the driving motor to rotate, and the fixed frame 65 can be driven to rotate by the sliding frame 63. This makes it convenient to squeeze the packaging box when the packaging box is squeezed and deformed, so that the covered opening can leak out.

[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A high-precision packaging box front and back detection device based on machine vision, characterized in that: include: A conveying unit (1), wherein the conveying unit (1) is used to convey a packaging box; The conveying unit (1) is fixedly provided with a detection box (2), the detection box (2) is provided with a visual detection mechanism (3), the visual detection mechanism (3) comprises an upper detection probe (31) and a lower detection probe (32), the upper detection probe (31) and the lower detection probe (32) are used to simultaneously detect the front and back sides of the packaging box; The conveying unit (1) is provided with a guide mechanism (4), the guide mechanism (4) comprising two guide plates (41), the two guide plates (41) are fixedly arranged on the conveying unit (1), and the two guide plates (41) are used to guide the packaging box; The guide plate (41) is provided with an interval conveying mechanism (5), and the interval conveying mechanism (5) comprises a hinged resistance plate (52), and the resistance plate (52) is used to provide resistance during the conveying process of the packaging boxes and to convey the packaging boxes one by one at intervals.

2. According to claim 1, a high-accuracy machine vision-based packaging box front and back detection device is characterized in that: The visual inspection mechanism (3) further comprises four transmission rollers (33), wherein the four transmission rollers (33) are rotatably arranged in the inspection box (2), the conveying unit (1) comprises a conveyor belt (11), wherein the conveyor belt (11) is transmission-arranged on the four transmission rollers (33), and the lower inspection probe (32) is located between the four transmission rollers (33).

3. According to claim 1, a high-accuracy machine vision-based packaging box front and back detection device is characterized in that: The guide mechanism (4) further comprises a plurality of guide rollers (43). Sides of the two guide plates (41) adjacent to each other are each provided with a side groove (42). The plurality of guide rollers (43) are rotatably arranged in the corresponding side grooves (42).

4. According to claim 1, a high-accuracy machine vision-based packaging box front and back detection device is characterized in that: The interval conveying mechanism (5) further comprises a fixing plate (51), the resistance plate (52) is hinged on the fixing plate (51), and an elastic member (53) is arranged between the fixing plate (51) and the resistance plate (52).

5. According to claim 1, a high-accuracy machine vision-based packaging box front and back detection device is characterized in that: The front and back detection device also includes a squeezing mechanism (6), the squeezing mechanism (6) includes a fixed frame (62), a sliding frame (63) is slidably arranged inside the fixed frame (62), a linear driving member (64) is installed on the fixed frame (62), the linear driving member (64) is used to drive the sliding frame (63) to move linearly, a fixed frame (65) is fixedly installed at the bottom of the sliding frame (63), linear driving members (66) are installed on both sides of the fixed frame (65), and squeezing rollers (67) are installed at the output ends of the two linear driving members (66).

6. The high-accuracy front and back detection device for packaging boxes based on machine vision according to claim 5, characterized in that: The extrusion mechanism (6) further comprises a rotary drive member (61), wherein the rotary drive member (61) is mounted on the detection box (2), and an output end of the rotary drive member (61) is fixedly connected to a fixing frame (62).

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