Image acquisition device in cigarette filter stick center line detection

Abstract

The utility model discloses an image acquisition device in cigarette filter stick center line detection, which comprises wheel drums provided with a plurality of clamping grooves along the circumferential direction, and the adjacent wheel drums with the clamping grooves in the plurality of wheel drums are tangent to form a transmission track ascending from bottom to top or descending from top to bottom; the appearance image obtaining mechanism and the center line image obtaining mechanism are arranged in a staggered mode along the conveying track, the appearance image obtaining mechanism forms a working direction facing an arc-shaped face in the conveying track, and the center line obtaining mechanism located on the side portion of the wheel drum forms a working direction facing the side face of the wheel drum so as to obtain filter stick end face image information; lED strip-shaped lamp strips in the appearance image obtaining mechanism and the center line image obtaining mechanism form a set illumination range, and the set illumination range covers the shooting range of the appearance image obtaining mechanism and the shooting range of the center line image obtaining mechanism. The appearance and the filter stick are respectively detected by utilizing positions with different heights, so that the filter stick can be collected from multiple surfaces.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette filter rod quality inspection, in particular to an image acquisition device for cigarette filter rod center line detection in the image acquisition process. Background Art

[0002] In the production process of cigarette filter rods, due to material differences and inadequate maintenance of filter rod forming machines and many other reasons, certain defects will occur in the center line and appearance of the filter rods, such as: wrinkles, deformation, creases, breakage, puncture, no center line, center line deviation, etc. In the traditional filter rod defect detection process, the quality of filter rods is detected by manual sampling inspection, which has low efficiency and high labor intensity. Moreover, the sampling feedback is lagging. By the time the defective filter rods are sampled, a large number of defective filter rods have been produced by the filter rod forming machine, resulting in serious waste. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an image acquisition device in the cigarette filter rod center line detection mechanism, which respectively acquires appearance and end pictures, providing a basis for subsequent appearance and center line judgment.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions.

[0005] An image acquisition device for cigarette filter rod center line detection includes

[0006] A drum with a number of slots arranged circumferentially. Among the several drums, adjacent drums with slots are tangent to each other, forming a transmission trajectory that climbs from bottom to top or descends from top to bottom.

[0007] An appearance image acquisition mechanism and a center line image acquisition mechanism arranged at a dislocation along the transmission trajectory. The appearance image acquisition mechanism forms a working direction towards the arc surface in the transmission trajectory, and the center line acquisition mechanism located on the side of the drum forms a working direction towards the side of the drum to obtain the end face image information of the filter rod.

[0008] The LED strip light belts in the appearance image acquisition mechanism and the center line image acquisition mechanism form a set illumination range, and the set illumination range covers the shooting ranges of the appearance image acquisition mechanism and the center line image acquisition mechanism.

[0009] Further, it also includes an assembly surface formed by a fixed bracket, and several of the drums, the appearance image acquisition mechanism and the center line image acquisition mechanism are all arranged on the assembly surface.

[0010] Further, on the assembly surface, the appearance image acquisition mechanism is located above the center line image acquisition mechanism.

[0011] Further, the appearance image acquisition mechanism and the center line image acquisition mechanism form a semi-enclosed cavity located outside the drum.

[0012] Further, the first bracket of the appearance image acquisition mechanism and the appearance image acquisition box located below the first bracket, and a first camera is arranged in the appearance image acquisition box.

[0013] Further, a lamp bead assembly is embedded on the appearance image acquisition box, and the lamp bead assembly forms a limiting cavity for clamping the first camera on the camera mounting plate.

[0014] Further, it further includes a second bracket for the center line image acquisition mechanism located on the assembly surface. The second bracket sequentially forms an assembly part, a support part and a connection part, and the assembly part, the support part and the connection part are perpendicular to each other in pairs.

[0015] Further, a camera installation bin is arranged in the appearance image acquisition box, and a window for the operation of the second camera lens is arranged at the camera installation bin.

[0016] Further, it further includes an electric control box located above the drum, and a touch screen for displaying the acquisition results of the appearance image acquisition mechanism and the center line image acquisition mechanism is arranged on the electric control box.

[0017] The beneficial effects of the present utility model are as follows:

[0018] In the present utility model, transmission trajectories at different heights are formed, and then two groups of image acquisition mechanisms are selected to respectively acquire images at different positions, and then cooperate to obtain the final appearance judgment drawing, providing a basis for subsequent appearance detection.

[0019] In the present utility model, from a structural perspective, it is perfectly integrated into the filter rod forming machine, will not affect the original machine, has a relatively low design complexity, high flexibility, is convenient for installation and adjustment, and has a strong and durable structure. Description of the Drawings

[0020] Figure 1 It is one of the structural schematic diagrams of the image acquisition device in the middle line detection of cigarette filter rods provided by the present utility model;

[0021] Figure 2 It is the second of the structural schematic diagrams of the image acquisition device in the middle line detection of cigarette filter rods provided by the present utility model;

[0022] Figure 3 It is the structural schematic diagram of the appearance image acquisition mechanism provided by the present utility model;

[0023] Figure 4 It is the assembly drawing of the first camera provided by the present utility model;

[0024] Figure 5Schematic diagram of the structure of the center line image acquisition mechanism provided by the present utility model;

[0025] Figure 6 Schematic diagram of the structure of the second bracket provided by the present utility model;

[0026] In the figure:

[0027] 100, drum; 200, appearance image acquisition mechanism; 210, first bracket; 220, appearance image acquisition box; 230, first camera; 240, strip hole; 250, lamp bead assembly; 300, center line image acquisition mechanism; 310, second bracket; 311, assembly part; 312, support part; 313, connection part; 320, second camera; 330, camera installation bin; 331, window; 400, LED strip light; 500, fixed bracket; 510, assembly surface; 600, filter rod; 700, electric control box; 710, touch screen. Detailed implementation manners

[0028] The present utility model will be described in detail below in conjunction with the embodiments shown in the drawings. It should be noted, however, that these embodiments do not limit the present utility model, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0029] Referring to the attached Figures 1-6 As shown, the image acquisition device for detecting the center line of a cigarette filter rod includes a drum 100 provided with a plurality of card slots along the circumferential direction. Among the plurality of drums 100, adjacent drums 100 with card slots are tangent to each other to form a transmission trajectory that climbs from bottom to top or descends from top to bottom.

[0030] An appearance image acquisition mechanism 200 and a center line image acquisition mechanism 300 are arranged out of position along the transmission trajectory. The appearance image acquisition mechanism 200 forms a working direction towards the arc surface in the transmission trajectory, and the center line acquisition mechanism 300 located on the side of the drum 100 forms a working direction towards the side of the drum to obtain the image information of the end face of the filter rod.

[0031] In order to ensure good lighting for photographing, the LED strip lights 400 in the appearance image acquisition mechanism 200 and the center line image acquisition mechanism 300 form a set lighting range, and the set lighting range covers the shooting ranges of the appearance image acquisition mechanism 200 and the center line image acquisition mechanism 300. At this time, the light range is wide to ensure the photographing effect.

[0032] In this embodiment, the image acquisition mechanism only acquires the filter rod and appearance photos passing through the same position relatively. The drum rotates, but the image acquisition mechanism is fixed. Subsequently, an assembly surface is added, and then the image acquisition mechanism is adjusted slightly through a bracket, and the light source in the image detection mechanism can also be fine-tuned.

[0033] In actual transmission, the transmission between the drums is completed by blowing and sucking air. For example, when the filter rod on the lower drum needs to be transferred to the higher drum, when the filter rod on the lower drum is transported to the junction of the two drums, the air holes at the corresponding positions of the lower drum will change the suction to blowing, and the filter rod will be blown above the drum, and the higher drum will suck air again to hold the filter rod.

[0034] Furthermore, it also includes an assembly surface 510 formed by a fixing bracket 500, and the plurality of wheel drums 100, the appearance image acquisition mechanism 200 and the centerline image acquisition mechanism 300 are all arranged on the assembly surface 510. The centralized assembly makes the structure compact and the space utilization rate good.

[0035] In the configuration, on the assembly surface 510 , the appearance image acquisition mechanism 100 is located above the centerline image acquisition mechanism 200 , thereby facilitating the appearance image acquisition mechanism to form a downward shooting angle and shooting direction.

[0036] In this embodiment, in order to partially protect the drum and the filter rod 600 on the drum, the appearance image acquisition mechanism 200 and the centerline image acquisition mechanism 300 form a semi-enclosed cavity located outside the drum 100. The semi-enclosed cavity is used to protect the rotating drum.

[0037] When the specific structure is assembled, the appearance image acquisition mechanism 200 includes a first bracket 210 and an appearance image acquisition box 220 located below the first bracket 210, and a first camera 230 is arranged in the appearance image acquisition box 220. The first bracket 210 is used to complete the assembly with the assembly surface 510. Specifically, two strip holes 240 are arranged on the first bracket 210 to form two assembly locations, and then the strip holes 240 are used to form an assembly distance, so that the installation position can be adjusted.

[0038] Furthermore, the appearance image acquisition box 220 is embedded with a lamp bead assembly 250 constituting the LED strip light strip, and the lamp bead assembly 250 forms a limiting cavity for clamping the first camera 230 on the camera mounting plate. At this time, the lamp bead assembly clamps both sides, which further ensures stability during acquisition.

[0039] For the centerline image acquisition mechanism 300, it further includes a second bracket 310 located on the assembly surface 510. The second bracket 310 successively forms an assembly portion 311, a support portion 312, and a connection portion 313. The assembly portion 311, the support portion 312, and the connection portion 313 are perpendicular to each other in pairs. By being perpendicular to each other, the space is made compact, and at the same time, the entire assembly trajectory with support is formed. Then, the second camera is assembled through the connection portion 313. At this time, the second camera is located at the side of the drum, and a photo of the end face of the filter rod is collected.

[0040] In this embodiment, in order to assemble the second camera 320, the centerline image acquisition mechanism 300 further includes a camera installation bin 330. A window 331 for the lens of the second camera 320 to work is provided at the camera installation bin 330. At this time, the second camera 320 and other structures can be protected through the camera installation bin 330, and the lens can be limited through the window. Specifically, a camera installation bin 330 forming a semi-enclosed cavity is added below the second bracket, and then the second camera is assembled in the camera installation bin.

[0041] Refer to the appendix Figures 1-2 As shown, it further includes an electric control box 700 located above the drum 100. A touch screen 710 for displaying the acquisition results of the appearance image acquisition mechanism 200 and the centerline image acquisition mechanism 300 is provided on the electric control box 700.

[0042] In order to be fully connected to the existing equipment, the starting end of the transmission trajectory is connected to a filter rod forming machine, and the end is connected to a cigarette making machine. Furthermore, in this embodiment, the structure is perfectly integrated into the filter rod forming machine, without affecting the original machine, with a low design complexity, high flexibility, being easy to install and adjust, and having a strong and durable structure.

[0043] In this embodiment, the camera on the drum is used to obtain photos of the ends of the cigarettes, which provides a basis for subsequent detection and judgment. At the same time, as the drum keeps rotating, photos of the ends of multiple cigarettes are collected.

[0044] Refer to the appendix Figures 1-6As shown in the figure, in this embodiment, the center line detection mechanism of the cigarette filter rod specifically selects two high-speed USB cameras to form the first camera and the second camera. One camera is located inside the appearance detection box and takes pictures of the front of the cigarette filter rod (i.e., the appearance image acquisition mechanism) to detect the appearance defects of the filter rod, and can detect appearance quality defects such as filter rod wrinkles, deformations, creases, breakages, and punctures. The other camera is located inside the center line detection box and takes pictures of the side of the cigarette filter tip (i.e., the center line image acquisition mechanism) to detect the center line of the filter tip, and can detect defects such as no center line and center line deviation. At the same time, this system gets rid of the constraints of hardware solidification and passive software use. Its PC image processing software, through existing technology algorithms, has the characteristics of good flexibility and adaptability, can adapt to the complex detection requirements of manufacturers, and achieves stable, reliable, and convenient effects. The mechanical structure design has a relatively low complexity and high flexibility, which is convenient for adjusting the shooting angle to obtain more accurate photos.

[0045] The principle in this embodiment is as follows:

[0046] An encoder is installed on the drum of the original machine. The control board lights up the light source at the appropriate time according to the phase signal provided by the encoder and controls the camera to take pictures of the front and side of the filter rod. After the image shooting is completed, the image is transmitted to the industrial control computer (i.e., the electric control box 700), and the detection software analyzes and processes the current image and transmits the processing result to the control board. If an unqualified filter rod appears, an alarm is triggered and the machine stops.

[0047] Touch screen: Provides a friendly human-machine interface. On the one hand, it is used to display real-time images, detection results, rejection rates, etc. On the other hand, it is used to adjust various parameters, including camera parameters, control board parameters, detection software parameters, etc.

[0048] Electric control cabinet: It is mainly composed of a set of industrial control computer, a set of IO control board, signal board, etc., and is mainly used for receiving and transmitting signals, processing images, etc.

[0049] Appearance detection box component: It is composed of a set of LED strip lights, a set of high-speed cameras, and other supporting mechanical parts, and is used to detect the appearance quality defects of the cigarette filter rod.

[0050] Center line detection box component: It is composed of a set of LED strip lights, a set of high-speed cameras, and other supporting mechanical parts, and is used to detect the appearance quality defects on the side of the cigarette filter rod.

[0051] In this embodiment, the appearance detection box component and the center line detection box component are respectively fixed on the existing original machine through fixed brackets. The slot holes on the mechanical parts can realize the up and down, front and back movement and small rotation of the detection box, and the detection effect is enhanced by adjusting the position.

[0052] For the high-speed rotation of the drum, a high-speed USB camera (with a shutter speed up to 1 us) is used to capture images and synchronously detect the appearance and center line of the filter tip.

[0053] When the filter rod is transported on the drum, the detection box is installed on the side of the drum. The camera inside the detection box is used to take pictures of the cross-section of the filter rod to detect the center line of the filter rod.

[0054] The detection box is installed on the front of the drum. The light sources inside the detection box are distributed at the upper and lower ends of the camera to illuminate the filter rod on the drum, and the camera inside is used to take pictures of the front of the filter rod to detect the appearance of the filter rod.

[0055] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the present utility model, and they are not intended to limit the protection scope of the present utility model. Any equivalent implementation modes or changes made without departing from the technical spirit of the present utility model should be included in the protection scope of the present utility model.

[0056] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0057] In addition, it should be understood that although this specification is described according to implementation modes, not every implementation mode only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An image acquisition device for detecting the center line of a cigarette filter rod, characterized in that, including, a drum with a plurality of card slots arranged circumferentially. Among the plurality of drums, adjacent drums with card slots are tangent to each other to form a transmission trajectory that climbs from bottom to top or descends from top to bottom; an appearance image acquisition mechanism and a center line image acquisition mechanism arranged out of position along the transmission trajectory. The appearance image acquisition mechanism forms a working direction towards the arc surface in the transmission trajectory, and the center line image acquisition mechanism located on the side of the drum forms a working direction towards the side of the drum to obtain the image information of the end face of the filter rod; the LED strip light belts in the appearance image acquisition mechanism and the center line image acquisition mechanism form a set illumination range, and the set illumination range covers the shooting ranges of the appearance image acquisition mechanism and the center line image acquisition mechanism.

2. The image acquisition device in the detection of the center line of the cigarette filter rod according to claim 1, wherein, It further includes an assembly surface formed by a fixed bracket, and a plurality of the drums, the appearance image acquisition mechanism and the center line image acquisition mechanism are all arranged on the assembly surface.

3. The image acquisition device in the detection of the center line of the cigarette filter rod according to claim 2, characterized in that, On the assembly surface, the appearance image acquisition mechanism is located above the center line image acquisition mechanism.

4. The image acquisition device in the detection of the center line of a cigarette filter rod according to claim 2, wherein The appearance image acquisition mechanism and the center line image acquisition mechanism form a semi-enclosed cavity located outside the drum.

5. The image acquisition device in the detection of the center line of the cigarette filter rod according to claim 2, wherein The appearance image acquisition mechanism includes a first bracket and an appearance image acquisition box located below the first bracket, and a first camera is arranged in the appearance image acquisition box.

6. The image acquisition device in the detection of the center line of the cigarette filter rod according to claim 5, wherein, A lamp bead assembly is embedded on the appearance image acquisition box, and the lamp bead assembly forms a limiting cavity for clamping the first camera on the camera mounting plate.

7. The image acquisition device in the center line detection of cigarette filter rods according to claim 2, characterized in that It further includes a second bracket for the center line image acquisition mechanism located on the assembly surface. The second bracket sequentially forms an assembly part, a support part and a connecting part, and the assembly part, the support part and the connecting part are perpendicular to each other in pairs.

8. The image acquisition device in the detection of the center line of the cigarette filter rod according to claim 5, wherein, A camera installation chamber is arranged in the appearance image acquisition box, and a window for the operation of the second camera lens is arranged at the camera installation chamber.

9. The image acquisition device in the detection of the center line of a cigarette filter rod according to claim 1, characterized in that, It further includes an electric control box located above the drum, and a touch screen for displaying the acquisition results of the appearance image acquisition mechanism and the center line image acquisition mechanism is arranged on the electric control box.

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