Packaging bottle defect detection equipment

Abstract

The utility model relates to the technical field of machine vision detection, and discloses packaging bottle defect detection equipment which comprises a conveying line, a backlight source and a vision detection set. The conveying line is used for conveying packaging bottles, and a detection station is arranged on the conveying line; the backlight source is arranged on the side of the conveying line in the second horizontal direction and corresponds to the detection station. The visual detection group comprises at least two image acquisition devices, and the at least two image acquisition devices are arranged at intervals along a first horizontal direction; the image acquisition device comprises a base, a turntable and a lens, the base is movably arranged on the side, away from the backlight source, of the conveying line, the turntable is rotatably arranged on the base, and the lens is arranged on the turntable; and the at least two lenses are used for photographing and imaging the packaging bottle together under the backlight condition provided by the backlight source when the packaging bottle is conveyed to the detection station so as to carry out defect detection. By means of the mode, the packaging bottle defect detection device can be compatible with packaging bottles of different shapes and types, and defect detection of various packaging bottles is accurately achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine vision detection, in particular to a packaging bottle defect detection device. BACKGROUND

[0002] Packaging bottles have been widely used in life, for example, laundry detergent, dishwashing liquid and the like adopt injection molded plastic bottles to fill corresponding liquid, and the packaging bottles of this type may form some injection molding defects such as lack of glue, deformation, cracking and the like during injection molding, which will affect the appearance of the product and the liquid filling in the later period.

[0003] In actual production process, the number of packaging bottles out of the mold on the production line is huge, in order to improve the efficiency of defect detection, the machine vision detection method is mostly adopted at present.

[0004] Most of the existing detection devices are customized design, that is, the position of the image acquisition device is designed according to the specific shape of the packaging bottle, so as to realize the defect detection after the specific shape of the packaging bottle is photographed and imaged. The customized detection device cannot be compatible with packaging bottles of different shapes or types, and when a new type of packaging bottle is out of the mold, the original detection device may not be able to accurately detect it. CONTENT OF THE INVENTION

[0005] In view of the above problems, the embodiments of the present application provide a packaging bottle defect detection device which can be compatible with packaging bottles of different shapes and types and accurately realize defect detection of various packaging bottles.

[0006] The packaging bottle defect detection device provided by the embodiments of the present application comprises a conveying line, a backlight source and a visual detection group; the conveying line is used for conveying packaging bottles along a first horizontal direction, and a detection station is arranged on the conveying line; the backlight source is arranged on the side of the conveying line along a second horizontal direction and corresponds to the detection station, wherein the second horizontal direction is perpendicular to the first horizontal direction; the visual detection group is arranged on the side of the conveying line away from the backlight source along the second horizontal direction, and the visual detection group comprises at least two image acquisition devices, and the at least two image acquisition devices are arranged at intervals along the first horizontal direction; the image acquisition device comprises a base, a turntable and a lens, the base is movably arranged on the side of the conveying line away from the backlight source along a horizontal plane, the turntable is rotatably arranged on the base, and the lens is arranged on the turntable; the base is used for adjusting the lens thereon to a target position when moving along the horizontal plane, and the turntable is used for adjusting the lens thereon to a target angle when rotating relative to the base; the at least two lenses are used for photographing and imaging the packaging bottle under the backlight condition provided by the backlight source when the packaging bottle is conveyed to the detection station, so as to perform defect detection.

[0007] In an alternative, the packaging bottle defect detection apparatus further comprises a crossbeam arranged at the side of the conveying line and extending along the first horizontal direction, and the base is provided with a strip-shaped hole along the second horizontal direction, and the image acquisition device further comprises a first fastener, which can pass through the strip-shaped hole and be fastened at any position on the crossbeam; when the first fastener is loosened, the base can be moved along the first horizontal direction to adjust its position relative to the crossbeam, and the base can be adjusted in position along the second horizontal direction by sliding the first fastener in the strip-shaped hole; when the first fastener is tightened, the base is fixed on the crossbeam.

[0008] In an alternative, the turntable is provided with an arc-shaped hole, and the image acquisition device further comprises a second fastener, which passes through the arc-shaped hole and is connected with the base; when the second fastener is loosened, the turntable can be adjusted in rotation angle by sliding the second fastener in the arc-shaped hole; when the second fastener is tightened, the turntable is fixed on the base.

[0009] In an alternative, the detection station comprises a first detection station and a second detection station arranged along the first horizontal direction; the conveying line has opposite first and second sides along the second horizontal direction; the backlight source comprises a first backlight source arranged at the first side of the first detection station and a second backlight source arranged at the second side of the second detection station; the visual detection group comprises a first visual detection group arranged at the second side of the conveying line and a second visual detection group arranged at the first side of the conveying line; at least two image acquisition devices in the first visual detection group are used to jointly take pictures of the packaging bottle under the backlight condition provided by the first backlight source when the packaging bottle is conveyed to the first detection station; at least two image acquisition devices in the second visual detection group are used to jointly take pictures of the packaging bottle under the backlight condition provided by the second backlight source when the packaging bottle is conveyed to the second detection station; the at least two image acquisition devices in the first visual detection group and the at least two image acquisition devices in the second visual detection group jointly cooperate to take pictures of the four sides of the packaging bottle for defect detection.

[0010] In an alternative, the at least two image acquisition devices in the first visual detection group are arranged staggered along the second horizontal direction, so that the at least two image acquisition devices in the first visual detection group are used to take pictures of two sides of the packaging bottle; the at least two image acquisition devices in the second visual detection group are also arranged staggered along the second horizontal direction, so that the at least two image acquisition devices in the second visual detection group are used to take pictures of the other two sides of the packaging bottle.

[0011] In an optional mode, the package bottle defect detection device further comprises a guiding mechanism, the guiding mechanism comprises at least two guiding members and adjusting members, the at least two guiding members are respectively arranged on both sides of the position upstream of the detection station on the conveying line, and each guiding member is movably connected to the support body of the conveying line in the second horizontal direction and the vertical direction through at least one adjusting member; the at least two guiding members are used to guide the package bottle by contacting the two side surfaces of the package bottle when the package bottle passes through.

[0012] In an optional mode, the adjusting member comprises a vertical locking block, a vertical adjusting rod, a vertical locking member, a horizontal locking block, a horizontal adjusting rod and a horizontal locking member; the vertical locking block is fixedly connected to the support body, the vertical adjusting rod is movably connected to the vertical locking block in the vertical direction, and the vertical locking member is used to fix the vertical adjusting rod after the vertical adjusting rod is lifted to the target height; the horizontal locking block is fixedly arranged on the vertical adjusting rod, the horizontal adjusting rod is movably connected to the horizontal locking block in the second horizontal direction, and the horizontal locking member is used to fix the horizontal adjusting rod after the horizontal adjusting rod is moved to the target position; the guiding member is arranged at one end of the horizontal adjusting rod facing the conveying line.

[0013] In an optional mode, one side of the guiding member facing the conveying line is provided with an anti-static skin.

[0014] In an optional mode, the package bottle defect detection device further comprises a sensor, the sensor is arranged at the detection station, and the sensor is used to send a signal to the visual detection group to take a picture of the package bottle after detecting that the package bottle reaches the detection station.

[0015] In an optional mode, the package bottle defect detection device further comprises a rejection mechanism, the rejection mechanism is arranged at a position downstream of the detection station on the conveying line, and the rejection mechanism is used to reject the package bottle with defects from the conveying line.

[0016] In the package bottle defect detection device provided by the embodiment, at least two image acquisition devices are used to take pictures of the package bottle on the detection station in a spaced manner along the first horizontal direction, so that the package bottle is detected from different angles, and the detection is more comprehensive and reliable. On this basis, the image acquisition device can adjust the position on the side of the conveying line through the base movably arranged in the horizontal plane, and can also adjust the photographing angle through the rotating disc rotatably arranged on the base. Therefore, when a new shape or type of package bottle needs to be detected, the position and angle of each image acquisition device can be adjusted according to the new package bottle based on the online adjustment feature of the image acquisition device, so that the adjusted multiple image acquisition devices can also take clear pictures of the new package bottle, and accurate defect detection is realized.

[0017] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application and implement the same according to the contents of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0019] Figure 1 A perspective structural schematic view of the packaging bottle defect detection equipment provided by the embodiment of the present application is shown in the figure.

[0020] Figure 2 A top view structural schematic view of the packaging bottle defect detection equipment provided by the embodiment of the present application is shown in the figure.

[0021] Figure 3 A structural schematic view of the image acquisition device in the packaging bottle defect detection equipment provided by the embodiment of the present application is shown in the figure.

[0022] Figure 4 A structural schematic view of the image acquisition device in the packaging bottle defect detection equipment provided by the embodiment of the present application is shown in the figure.

[0023] Figure 5 A scene schematic view of the imaging of the packaging bottle by the two image acquisition devices in the first visual detection group of the packaging bottle defect detection equipment provided by the embodiment of the present application is shown in the figure.

[0024] Figure 6 A top view scene schematic view when photographing the side surface of the packaging bottle from a small inclination angle is shown in the figure.

[0025] Figure 7 A top view scene schematic view when photographing the side surface of the packaging bottle from a large inclination angle is shown in the figure.

[0026] Figure 8 A structural schematic view of the guide mechanism in the packaging bottle defect detection equipment provided by the embodiment of the present application is shown in the figure.

[0027] Figure 9 A structural schematic view of the first backlight source in the packaging bottle defect detection equipment provided by the embodiment of the present application is shown in the figure.

[0028] The reference numerals in the specific embodiments are as follows:

[0029] 100, packaging bottle defect detection equipment;

[0030] 110, conveying line; 1101, first side; 1102, second side; 111, detection station; 1111, first detection station; 1112, second detection station; 112, support body;

[0031] 120, backlight; 121, first backlight; 1211, baffle; 1212, bracket; 1213, light source controller; 122, second backlight;

[0032] 130, visual detection group; 1301, first visual detection group; 1302, second visual detection group; 131, image acquisition device; 1311, base; 13111, bar-shaped hole; 1312, turntable; 13121, arc-shaped hole; 1313, lens; 1314, first fastener; 1315, second fastener;

[0033] 140, cross beam; 141, sliding groove;

[0034] 150, guiding mechanism; 151, guiding piece; 1511, arc-shaped structure; 152, adjusting piece; 1521, vertical locking block; 1522, vertical adjusting rod; 1523, vertical locking piece; 1524, horizontal locking block; 1525, horizontal adjusting rod; 1526, horizontal locking piece;

[0035] 160, sensor;

[0036] 170, rejection mechanism; 171, rejection detection sensor; 172, air nozzle;

[0037] 180, cabinet; 181, control unit; 182, display; 183, operation table; 184, alarm lamp; 200, packaging bottle. DETAILED DESCRIPTION

[0038] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0041] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean: A exists, A and B exist, and B exists. In addition, the character " / " herein generally represents a "or" relationship between the front and rear associated objects.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] The defect detection of the packaging bottle is mainly through the lens to take a picture of it. If a part of the packaging bottle has defects such as glue deficiency, deformation, and cracking, then in the image, the color of the part and other parts will be obviously different, and then the existing image recognition algorithm can be used to identify whether the part has defects in the image, or the image of the qualified packaging bottle can be pre-stored as a standard image, and the current image is compared with the standard image to determine whether the current detected packaging bottle has defects.

[0047] On this basis, in order to make the detection equipment compatible with packaging bottles of different shapes or types, the visual detection group in the detection equipment is designed to adjust the position and orientation of the lens in line, so that accurate and reliable defect detection can be performed on different packaging bottles.

[0048] The embodiment of the application provides a packaging bottle defect detection equipment. First, please refer to Figure 1 and Figure 2 , Figure 1 , the perspective structure of the packaging bottle defect detection equipment is shown, Figure 2 , the top view structure of the packaging bottle defect detection equipment is shown. As shown in the figure, the packaging bottle defect detection equipment 100 includes a conveying line 110, a backlight source 120 and a visual detection group 130. The conveying line 110 is used to convey the packaging bottle 200 along the first horizontal direction (the x-axis direction in the figure). It should be noted that in the specific embodiment shown in the figure, the packaging bottle 200 is taken as an example of a packaging bottle of washing-up liquid, which does not constitute a limitation on the types of packaging bottles that can be detected by the packaging bottle defect detection equipment 100.

[0049] As shown in Figure 2 , the conveying line 110 is provided with a detection station 111, and the backlight source 120 is arranged on the side of the conveying line 110 along the second horizontal direction (the y-axis direction in the figure) and corresponds to the detection station 111. The visual detection group 130 is arranged on the side of the conveying line 110 away from the backlight source 120 along the y-axis direction, and includes at least two image acquisition devices 131. The at least two image acquisition devices 131 are arranged at intervals along the first horizontal direction, so that each image acquisition device 131 can take a picture of the packaging bottle 200 on the detection station 111 from different angles, and the backlight source 120 provides backlight for them.

[0050] Optionally, as shown in Figure 2 , the packaging bottle defect detection equipment 100 can include a sensor 160 arranged at the detection station 111. The sensor 160 is used to send a signal to the visual detection group 130 to make it take a picture of the packaging bottle 200 after detecting that the packaging bottle 200 arrives at the detection station 111.

[0051] Please further combine Figure 3 , the specific structure of the image acquisition device 131 is shown in the figure, as shown in the figure, the image acquisition device 131 includes a base 1311, a turntable 1312 and a lens 1313, the base 1311 is movably arranged on the conveying line 110 away from the backlight 120 side, specifically, the base 1311 can be assembled by setting the profile bracket, slide rail and other ways, which is not limited here. The turntable 1312 is rotatably arranged on the base 1311, and the lens 1313 is arranged on the turntable 1312.

[0052] Based on the structure design of the above-mentioned image acquisition device 131, when it is necessary to adjust online to accurately detect the packaging bottle of corresponding shape, the position and angle can be adjusted by moving the base 1311 in the horizontal plane and rotating the turntable 1312. When the image taken by the packaging bottle reaches the expectation, it indicates that it has been adjusted to the target position and angle, and the actual defect detection work can be carried out after the adjustment is completed.

[0053] In the actual defect detection process, when the packaging bottle 200 is conveyed to the detection station 111, at least two lenses 1313 jointly take pictures of the packaging bottle 200 under the backlight condition provided by the backlight 120. After imaging, the defect detection can be carried out through the above-mentioned image recognition algorithm or comparison with the standard image, and the specific defect detection method is not limited here.

[0054] The packaging bottle defect detection equipment 100 provided by the embodiment of the application first adopts at least two image acquisition devices 131 to jointly take pictures of the packaging bottle 200 on the detection station 111 in a spaced manner along the first horizontal direction, so as to realize the defect detection of the packaging bottle 200 from different angles, which is more comprehensive and reliable. On this basis, the image acquisition device 131 can realize the position adjustment on the side of the conveying line 110 through the base 1311 movably arranged in the horizontal plane, and also can realize the adjustment of the photographing angle through the turntable 1312 rotatably arranged on the base 1311. Therefore, when it is necessary to detect the defect of the packaging bottle of new shape or type, based on the online adjustment characteristics of the image acquisition device 131, the position and angle of each image acquisition device 131 can be adjusted for the new packaging bottle, so that the adjusted multiple image acquisition devices 131 can also take clear pictures of the new packaging bottle, and accurate defect detection is realized.

[0055] For the specific manner of movably arranging the base 1311 in the horizontal plane, the application provides a specific embodiment, please continue to refer to Figure 2 and Figure 3 , and further combine Figure 4 , Figure 4The figure shows the structure of the image acquisition device after installation. As shown, the packaging bottle defect detection device 100 also includes a crossbeam 140 located on the side of the conveyor line 110 and extending along the x-axis. A slotted hole 13111 is provided on the base 1311 along the y-axis. The image acquisition device 131 also includes a first fastener 1314, which can pass through the slotted hole 13111 and be fastened to any position on the crossbeam 140. When the first fastener 1314 is loose, the base 1311 can be moved along the x-axis to adjust its position relative to the crossbeam, and the base 1311 can slide within the slotted hole 13111 via the first fastener 1314 to adjust its position along the y-axis. When the first fastener 1314 is tightened, the base 1311 is fixed to the crossbeam 140.

[0056] Specifically, such as Figure 4 As shown, a groove 141 extending along the x-axis can be formed on the crossbeam 140. The first fastener 1314 has a structure in which a bolt passes through the slot 13111 and the groove 141 in sequence and engages with a nut within the groove 141. When the first fastener 1314 is loosened, the position of the lens 1313 along the x-axis can be adjusted by sliding the base 1311 in the x-axis direction, and the position of the lens 1313 along the y-axis can be adjusted by sliding the base 1311 relative to the first fastener 1314 in the y-axis direction. This allows for position adjustment of the lens 1313 on the horizontal plane, enabling it to adapt to different shapes or types of packaging bottles. After adjusting to the target position, the bolt and nut are tightened, and the lens 1313 is fixed, thus enabling stable and reliable image acquisition.

[0057] Alternatively, a strip-shaped connecting hole or connecting groove can be opened on the crossbeam 140. The first fastener 1314 is a screw. After the screw is removed from the crossbeam 140, the base 1311 is separated from the crossbeam 140. Then, the crossbeam 140 is moved and placed on the crossbeam 140 at the target position along the x-axis. The base 1311 is slid relative to the screw along the y-axis to the target position. Then, the screw is screwed into the connecting hole or connecting groove on the crossbeam 140 to fix it, thereby realizing the adjustment of the position of the lens 1313 in the horizontal plane.

[0058] To facilitate adjustment, the first fastener 1314 can be a hand-tightened screw or bolt, allowing for quick position adjustment without tools.

[0059] The rotatable connection between turntable 1312 and base 1311 can be achieved in a similar manner; please refer to the previous document for details. Figure 3The rotating disc 1312 can be provided with an arc-shaped hole 13121, and the image acquisition device 131 further comprises a second fastener 1315 penetrating through the arc-shaped hole 13121 and connected with the base 1311. When the second fastener 1315 is loosened, the rotating disc 1312 can be adjusted in the rotating angle by sliding in the arc-shaped hole 13121 through the second fastener 1315, so as to adjust the direction of the lens 1313. When the second fastener 1315 is tightened, the rotating disc 1312 is fixed on the base 1311.

[0060] Specifically, the second fastener 1315 can be a bolt, a screw or the like, preferably a hand-tightened bolt or screw, and is connected with the base 1311 through thread cooperation after penetrating through the arc-shaped hole 13121. When the second fastener 1315 is loosened, the rotating disc 1312 can be easily rotated to adjust the direction of the lens 1313 thereon. When the second fastener 1315 is tightened, the head portion thereof presses and fixes the rotating disc 1312 on the base 1311, so as to reliably fix the lens 1313 in the current direction.

[0061] In order to comprehensively detect the defects of the packaging bottle 200, the present application further provides an embodiment, which will be described in detail below Figure 2 The detection station 111 comprises a first detection station 1111 and a second detection station 1112 arranged along the x-axis direction, and the conveying line 110 has opposite first and second sides 1101 and 1102 along the y-axis direction. The backlight source 120 comprises a first backlight source 121 and a second backlight source 122, wherein the first backlight source 121 is arranged on the first side 1101 of the first detection station 1111, and the second backlight source 122 is arranged on the second side 1102 of the second detection station 1112.

[0062] The visual detection group 130 comprises a first visual detection group 1301 and a second visual detection group 1302, wherein the first visual detection group 1301 is arranged on the second side 1102 of the conveying line 110, and the second visual detection group 1302 is arranged on the first side 1101 of the conveying line.

[0063] As Figure 2The orientations and field angles of the image acquisition devices 131 are shown by the dotted lines. At least two image acquisition devices 131 in the first visual inspection group 1301 are used to jointly take images of the packaging bottle 200 under the backlighting condition of the first backlight source 121 when the packaging bottle 200 is conveyed to the first detection station 1111. At least two image acquisition devices 131 in the second visual inspection group 1302 are used to jointly take images of the packaging bottle 200 under the backlighting condition of the second backlight source 122 when the packaging bottle 200 is conveyed to the second detection station 1112. Thus, through the cooperation of the at least two image acquisition devices 131 in the first visual inspection group 1301 and the at least two image acquisition devices 131 in the second visual inspection group 1302, the images of the packaging bottle 200 around the four sides are realized, and then the images can be used to detect the packaging bottle 200 more comprehensively, improve the accuracy of detection, and prevent small defects from being missed.

[0064] In order to completely cover the four sides of the packaging bottle 200, the positions of the at least two image acquisition devices in each visual inspection group are specially designed, please continue to refer to Figure 2 , and further combined with Figure 5 , Figure 5 The specific range of the at least two image acquisition devices 131 in the first visual inspection group 1301 for taking images of the packaging bottle 200 is shown from a three-dimensional perspective in FIG. 8. As shown in the figure, the at least two image acquisition devices 131 in the first visual inspection group 1301 are arranged in a staggered manner along the y-axis direction, so that the at least two image acquisition devices 131 in the first visual inspection group 1301 are used to take images of two sides of the packaging bottle 200. The arrangement direction of the at least two image acquisition devices 131 in the second visual inspection group 1302 is the same, so as to take images of the other two sides of the packaging bottle 200.

[0065] As shown in Figure 2 , after the at least two image acquisition devices 131 are arranged in a staggered manner along the y-axis direction, the image acquisition device 131 far away from the packaging bottle 200 along the y-axis direction can better cover the side of the packaging bottle 200 facing the second side 1102. The image acquisition device 131 close to the packaging bottle 200 along the y-axis direction can take images of the side of the packaging bottle 200 along the x-axis direction at a relatively large angle in a position close to the packaging bottle 200 along the x-axis direction.

[0066] As shown in Figure 6 , the angle refers to the angle between the optical axis of the image acquisition device 131 and the surface of the packaging bottle 200. If the surface of the packaging bottle 200 is a curve, it is the angle with the tangent, that is, the θ angle in the figure. The larger the θ angle, the more vertical the optical axis of the image acquisition device 131 is to the surface of the packaging bottle 200.

[0067] If the packaging bottle 200 is imaged at a small inclination angle as shown in Figure 6 , the area proportion of the right side of the packaging bottle 200 in the entire image captured by the image acquisition device 131 is small, and correspondingly, the resolution of the right side of the packaging bottle 200 in the image can be limited, which may result in a decrease in the accuracy of defect detection.

[0068] On the contrary, if the packaging bottle 200 is imaged at a large inclination angle as shown in Figure 7 , the area proportion of the right side of the packaging bottle 200 in the entire image can be increased, and correspondingly, the resolution of the right side of the packaging bottle 200 in the image can be improved, which ensures the accuracy of detection.

[0069] On this basis, in the embodiment, at least two image acquisition devices 131 are arranged in a staggered manner along the y-axis direction, so that the image acquisition device 131 closer to the packaging bottle 200 along the y-axis direction can image at a larger inclination angle on the side of the packaging bottle 200 along the x-axis direction, which realizes the improvement of detection accuracy without occupying a larger space range.

[0070] As shown in Figure 4 , for the above-mentioned manner of moving and adjusting the position of the image acquisition device 131 along the x-axis direction by the cross beam 140, in order to meet the staggered arrangement of at least two image acquisition devices 131 along the y-axis direction, a plurality of cross beams 140 equal to the number of image acquisition devices 131 and staggered along the y-axis direction can be arranged, and each image acquisition device 131 is installed on one of the cross beams 140 one by one.

[0071] It should be noted that in the specific embodiments shown in the drawings, the first visual detection group 1301 and the second visual detection group 1302 each image the four sides of the packaging bottle 200 by two image acquisition devices 131, which does not constitute a limitation on the specific number of image acquisition devices 131 in the first visual detection group 1301 or the second visual detection group 1302. For example, when the packaging bottle 200 is a laundry detergent packaging bottle with a large volume or a long length, or a complex curved surface with uneven surface, the image acquisition device 131 in the first visual detection group 1301 or the second visual detection group 1302 can also be designed to be three or more.

[0072] In order to improve the detection accuracy, as shown in Figure 1 , the packaging bottle defect detection equipment 100 can further include a guide mechanism 150, as shown in Figure 2As shown in the middle, the guide mechanism 150 includes at least two guide members 151 and adjusting members 152, and the at least two guide members 151 are respectively arranged on both sides of the upstream position of the detection station 111 of the conveying line 110, and the adjusting members 152 are arranged between the guide members 151. Figure 8 As shown in the structure at the guide mechanism 150, each guide member 151 is movably connected to the support body 112 of the conveying line 110 along the y-axis direction and the z-axis direction through at least one adjusting member 152.

[0073] The guide member 151 can adopt a structure such as a baffle, a block, a brush, etc. When the packaging bottle 200 is conveyed to the guide mechanism 150 along the positive direction of the x-axis, if the packaging bottle 200 is not placed in the correct position, the side surface of the packaging bottle 200 will interfere with the guide member 151 on the side of the conveying line 110, and then the guide member 151 pushes the packaging bottle 200 to move slightly and correct the position, so that the image captured by the subsequent vision detection group 130 is more standard, thereby providing reliable image data for defect detection. Figure 8

[0074] The adjusting member 152 can adopt one or more of the existing sliding mechanism, screw mechanism, gear mechanism, etc. The purpose is to drive the guide member 151 to move relative to the conveying line 110 along the z-axis direction and the y-axis direction through the movement of the adjusting member 152. When different heights, different widths, and different shapes of packaging bottles are subjected to defect detection, the height of the guide member 151 and the relative distance between the guide members 151 on both sides of the conveying line 110 can be adjusted by the adjusting member 152, so as to meet the guiding requirements of the corresponding packaging bottle 200, and realize the compatibility of the guide mechanism 150 for different shapes or types of packaging bottles.

[0075] For the specific structure of the adjusting member 152, the present application further proposes an embodiment as shown in the middle. Figure 8 As shown in the middle, the adjusting member 152 includes a vertical locking block 1521, a vertical adjusting rod 1522, a vertical locking member 1523, a horizontal locking block 1524, a horizontal adjusting rod 1525, and a horizontal locking member 1526. The vertical locking block 1521 can be fixedly connected to the support body 112 by means of a threaded fastener, welding, clamping, etc. The vertical adjusting rod 1522 is movably connected to the vertical locking block 1521 along the z-axis direction, and can be movably connected to the vertical locking block 1521 along the z-axis direction, as shown in the middle. Figure 8 As shown in the middle, the vertical adjusting rod 1522 is movably connected to the vertical locking block 1521 by penetrating the vertical locking block 1521, and of course can be movably connected to the vertical locking block 1521 by a sliding fit mechanism, which is not limited here.

[0076] The vertical locking member 1523 is used to fix the vertical adjusting rod 1522 after it is lifted to the target height. Specifically, the vertical locking member 1523 can be a Figure 8 ​The threaded fastener shown in the vertical locking block 1521 is preferably a hand-tightened threaded fastener. After the vertical adjusting rod 1522 is lifted to the target height, the vertical locking block 1523 is tightened to abut the inner end of the vertical adjusting rod 1522 and press tightly, thereby limiting the lifting movement of the vertical adjusting rod 1522 and achieving the locking of the vertical adjusting rod 1522 at the current height.

[0077] Similarly, the horizontal locking block 1524 is fixedly arranged on the vertical adjusting rod 1522, and the horizontal adjusting rod 1525 is movably connected to the horizontal locking block 1524 along the y-axis direction. The connection between the horizontal adjusting rod 1525 and the horizontal locking block 1524 can be the same as the connection between the vertical adjusting rod 1522 and the vertical locking block 1521, which will not be described in detail here. Similarly, the horizontal locking block 1526 is used to fix the horizontal adjusting rod 1525 after it is moved to the target position. The locking method can be the same as that of the vertical locking block 1523 to the vertical adjusting rod 1522, which will not be described in detail here.

[0078] Finally, the guide 151 is arranged at one end of the horizontal adjusting rod 1525 facing the conveying line 110, so that when the horizontal adjusting rod 1525 moves along the y-axis direction relative to the horizontal locking block 1524, the distance between the guides 151 on both sides of the conveying line 110 can be adjusted. When the vertical adjusting rod 1522 is lifted along the z-axis direction relative to the vertical locking block 1521, the horizontal locking block 1524, the horizontal adjusting rod 1525, and the guide 151 on the horizontal adjusting rod 1525 will be lifted synchronously, thereby adjusting the height of the guide 151.

[0079] Further, the side of the guide 151 facing the conveying line 110 can be provided with an anti-static skin, such as a PVC anti-static skin, to avoid friction damage to the packaging bottle 200 or static electricity.

[0080] In addition, as shown in Figure 8 , the end of the guide 151 away from the detection station 111, i.e. the end of the guide 151 where the packaging bottle 200 flows in, is provided with an arc-shaped structure 1511. The arc-shaped structure 1511 can guide and transition the packaging bottle 200 after contacting the packaging bottle 200, thereby avoiding interference between the guide 151 and the packaging bottle 200 and causing the packaging bottle 200 to be stuck.

[0081] Please refer again to Figure 2 , the packaging bottle defect detection device 100 can further include a rejection mechanism 170 arranged at a position downstream of the detection station 111 on the conveying line 110. The rejection mechanism 170 is used to reject the packaging bottle 200 detected to have defects from the conveying line 110.

[0082] In Figure 2 In the specific embodiment shown, the rejection mechanism 170 includes a rejection detection sensor 171 and an air nozzle 172, and after the defective packaging bottle 200 is detected to arrive, it is blown out from the conveying line 110 by the air nozzle 172, which can simplify the production line structure, reduce the space occupation, and reduce the production cost compared with the mode of implementing the rejection by pushing the defective product out of the production line by a transmission mechanism composed of a pneumatic cylinder or the like.

[0083] Finally, for the convenience of understanding, the preferred embodiment shown in Figure 1 and Figure 2 In the embodiment, the packaging bottle defect detection device 100 includes a cabinet 180, and the cabinet 180 is provided with a control unit 181, a display 182, an operation table 183 and an alarm lamp 184. The control unit 181 includes a circuit control module and an industrial computer module, and the operation table 183 is placed with a keyboard and a mouse, and the technician realizes the control of each circuit module by operating on the operation table 183.

[0084] The conveying line 110 passes through the cabinet 180 from both sides, and the front ends of the first detection station 1111 and the second detection station 1112 are provided with sensors 160. When the conveying line 110 drives the packaging bottle 200 to move, it enters the cabinet 180 after being guided by the guiding mechanism 150. The sensor 160 at the front end of the first detection station 1111 sends a signal to the control unit 181 after detecting the packaging bottle 200, and then the control unit 181 controls the first backlight 121 to light up and controls two image acquisition devices 131 in the first visual detection group 1301 to take pictures. Similarly, when the sensor 160 at the front end of the second detection station 1112 detects the packaging bottle 200, it sends a signal to the control unit 181, and the control unit 181 controls the second backlight 122 to light up and controls two image acquisition devices 131 in the second visual detection group 1302 to take pictures. The images taken by each image acquisition device 131 are sent to the control unit 181 for calculation and recognition to detect whether there is a defect.

[0085] If neither of the images of the packaging bottle 200 captured by the first visual inspection group 1301 nor the second visual inspection group 1302 shows any defects, then when the packaging bottle 200 passes the rejection mechanism 170, the rejection mechanism 170 does not act, and the packaging bottle 200 continues to flow downward along the conveyor line 110. If at least one image of the packaging bottle 200 captured by the first visual inspection group 1301 and the second visual inspection group 1302 shows a defect, then the packaging bottle 200 is determined to be defective. When the rejection detection sensor 171 of the rejection mechanism 170 detects the arrival of the packaging bottle 200, it sends a signal to the control unit 181. The control unit 181 controls the air nozzle 172 to blow up and remove the packaging bottle 200 from the conveyor line 110.

[0086] Considering that during actual operation, the conveyor line 110 continuously transports packaging bottles 200, it's possible that packaging bottles 200 may be present simultaneously at the first inspection station 1111 and the second inspection station 1112. This means that the first visual inspection group 1301 and the first backlight 121, along with the second visual inspection group 1302 and the second backlight 122, are simultaneously taking pictures. Therefore, to prevent light leaking from the sides and back of the first backlight 121 from affecting the image acquisition of the second visual inspection group 1302, and to prevent light leaking from the sides and back of the second backlight 122 from affecting the image acquisition of the first visual inspection group 1301, as follows... Figure 9 As shown, the outer periphery and back of the first backlight 121 are covered with a baffle 1211 to prevent the light emitted by the first backlight 121 from overflowing from the side and affecting the imaging effect of the second visual detection group 1302. In addition, a bracket 1212 can be set at the bottom of the baffle 1211, and the baffle 1211 and the first backlight 121 on its inner periphery are mounted and fixed by the bracket 1212. The second backlight 122 is similar, so it will not be described in detail.

[0087] Furthermore, such as Figure 9 As shown, the first backlight 121 can be configured with a separate light source controller 1213. The light source controller 1213 is electrically connected to the control unit 181 for power supply and signal transmission. The control unit 181 achieves synchronous frequency control of the first backlight 121 and the first visual detection group 1301 by sending signals to the light source controller 1213. The second backlight 122 is similar and will not be described in detail.

[0088] It should be noted that the above embodiments are only used to illustrate but not limit the technical solutions of the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner.

Claims

1. A packaging bottle defect detection device, characterized in that, The package bottle defect detection device comprises a conveying line, a backlight source and a visual detection group. The conveying line is used for conveying package bottles along a first horizontal direction, and a detection station is arranged on the conveying line. The backlight source is arranged on a side of the conveying line along a second horizontal direction and corresponds to the detection station, wherein the second horizontal direction is perpendicular to the first horizontal direction. The visual detection group is arranged on a side of the conveying line away from the backlight source along the second horizontal direction, and comprises at least two image acquisition devices arranged at intervals along the first horizontal direction. The image acquisition device comprises a base, a rotating disc and a lens, the base is movably arranged on a side of the conveying line away from the backlight source along a horizontal plane, the rotating disc is rotatably arranged on the base, and the lens is arranged on the rotating disc. The base is used for adjusting the lens thereon to a target position when moving along the horizontal plane, and the rotating disc is used for adjusting the lens thereon to a target angle when rotating relative to the base. The at least two lenses are used for jointly imaging the package bottles under the backlight condition provided by the backlight source when the package bottles are conveyed to the detection station, so as to perform defect detection. The package bottle defect detection device further comprises a crossbeam arranged on a side of the conveying line and extending along the first horizontal direction, a strip-shaped hole is arranged on the base along the second horizontal direction, and the image acquisition device further comprises a first fastener which can pass through the strip-shaped hole and be fastened at any position on the crossbeam.

2. The package bottle defect detection apparatus according to claim 1, characterized by, When the first fastener is loosened, the base can be moved along the first horizontal direction to adjust the position thereof relative to the crossbeam, and the base can be adjusted in the position thereof along the second horizontal direction by sliding the first fastener in the strip-shaped hole. When the first fastener is tightened, the base is fixed on the crossbeam. An arc-shaped hole is arranged on the rotating disc, and the image acquisition device further comprises a second fastener which passes through the arc-shaped hole and is connected with the base.

3. The package bottle defect detection apparatus according to claim 1, characterized by, When the second fastener is loosened, the rotating disc can be adjusted in the rotating angle thereof by sliding the second fastener in the arc-shaped hole. When the second fastener is tightened, the rotating disc is fixed on the base. The detection station comprises a first detection station and a second detection station arranged along the first horizontal direction, and the conveying line has opposite first and second sides along the second horizontal direction.

4. The package bottle defect detection apparatus according to claim 1, characterized by, The backlight source comprises a first backlight source arranged on the first side of the first detection station and a second backlight source arranged on the second side of the second detection station. The visual detection group comprises a first visual detection group arranged on the second side of the conveying line and a second visual detection group arranged on the first side of the conveying line. ​ The at least two image acquisition devices in the first visual detection group are used to jointly take images of the packaging bottle under the backlight provided by the first backlight source when the packaging bottle is conveyed to the first detection station; The at least two image acquisition devices in the second visual detection group are used to jointly take images of the packaging bottle under the backlight provided by the second backlight source when the packaging bottle is conveyed to the second detection station; The at least two image acquisition devices in the first visual detection group and the at least two image acquisition devices in the second visual detection group jointly take images of the four sides of the packaging bottle for defect detection.

5. The package bottle defect detection apparatus according to claim 4, characterized by The at least two image acquisition devices in the first visual detection group are arranged in a staggered manner along the second horizontal direction, so that the at least two image acquisition devices in the first visual detection group are used to take images of two sides of the packaging bottle; The at least two image acquisition devices in the second visual detection group are also arranged in a staggered manner along the second horizontal direction, so that the at least two image acquisition devices in the second visual detection group are used to take images of the other two sides of the packaging bottle.

6. The package bottle defect inspection apparatus according to claim 1, wherein The packaging bottle defect detection device further comprises a guiding mechanism, the guiding mechanism comprises at least two guiding members and adjusting members, the at least two guiding members are respectively arranged on both sides of the conveying line at a position upstream of the detection station, and each guiding member is movably connected to the support body of the conveying line along the second horizontal direction and the vertical direction through at least one adjusting member; The at least two guiding members are used to adjust the packaging bottle by contacting the two side surfaces of the packaging bottle when the packaging bottle passes through.

7. The package bottle defect detection apparatus according to claim 6, characterized by, The adjusting member comprises a vertical locking block, a vertical adjusting rod, a vertical locking member, a horizontal locking block, a horizontal adjusting rod and a horizontal locking member; The vertical locking block is fixedly connected to the support body, the vertical adjusting rod is liftably connected to the vertical locking block along the vertical direction, and the vertical locking member is used to fix the vertical adjusting rod after it is lifted to a target height; The horizontal locking block is fixedly arranged on the vertical adjusting rod, the horizontal adjusting rod is movably connected to the horizontal locking block along the second horizontal direction, and the horizontal locking member is used to fix the horizontal adjusting rod after it is moved to a target position; The guiding member is arranged at one end of the horizontal adjusting rod facing the conveying line.

8. The package bottle defect detection apparatus according to claim 6, characterized by, One side of the guiding member facing the conveying line is provided with an anti-static skin.

9. The package bottle defect inspection apparatus according to any one of claims 1 to 8, characterized by, The packaging bottle defect detection device further comprises a sensor, the sensor is arranged at the detection station, and the sensor is used to send a signal to the visual detection group to take images of the packaging bottle after detecting that the packaging bottle reaches the detection station.

10. The package bottle defect inspection apparatus according to any one of claims 1 to 8, characterized by, The packaging bottle defect detection device further comprises a rejection mechanism, the rejection mechanism is arranged at a position downstream of the detection station on the conveying line, and the rejection mechanism is used to reject the packaging bottle detected to have defects from the conveying line.

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