Cigarette Filter End Face Visual Inspection System for Cigarette Making Machines

Abstract

The present invention discloses a cigarette filter end face visual detection system for a cigarette making machine, which includes: a photoelectric switch, an intelligent camera, an illumination light source, an axis encoder and a controller. The photoelectric switch is arranged at the entrance of a detection drum wheel to detect whether a cigarette exists. The intelligent camera is arranged in front of the entrance of a rejection drum wheel to detect the cigarette filter to determine whether the cigarette filter is hollow, ordinary or without a filter. The illumination light source is connected to the intelligent camera, and the axis encoder is coaxially connected to the detection drum wheel to generate a phase signal according to the running position of the detection drum wheel to locate the cigarette and trigger the photoelectric switch and the intelligent camera to detect. The cigarette filter end face visual detection system for a cigarette making machine of the present invention can effectively detect the cigarette filter end faces one by one in real time, thereby preventing cigarettes whose filter end faces do not meet the brand setting requirements from flowing into the next process due to the production process, reducing the occurrence of quality accidents and reducing the consumption of raw and auxiliary materials.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette detection, and in particular to a cigarette filter end face visual detection system for a cigarette making machine. Background Art

[0002] At present, the ZJ118 cigarette making machine is the mainstream cigarette making equipment in China. Its MAX filter tip assembler is mainly used to cut the double-length cigarettes fed by the cigarette forming machine into two sections, and then arrange the equally cut filter rods for connection and connection, and then wrap them with the glued outer wrapping paper to complete the connection and wrapping of the cigarettes. Finally, after relevant tests such as air leakage, missing tips, empty ends, and appearance, the qualified cigarettes are output from the output drum to the downstream machine to complete the wrapping of the cigarette packages. In cigarette production, in order to reduce the smoking resistance of cigarettes (especially ￠5.9mm slim cigarettes), 1 / 3 of the filter end is specially made into various styles of hollow filters (round, heart-shaped, five-pointed star, square, etc.). Therefore, according to the brand setting requirements, when using hollow filters to produce cigarettes, the filter end faces of the produced cigarettes must be inspected one by one in all directions, and the filter cigarettes with defects on the filter end faces (not meeting the brand requirements) must be accurately and effectively removed on the MAX removal drum to prevent unqualified cigarettes with defects on the filter end faces from flowing into the next process. At present, no effective method has been found to detect and remove such defective cigarettes, and the quality of cigarette products cannot be effectively guaranteed.

[0003] Therefore, there is an urgent need for a cigarette filter end face visual inspection system for cigarette making machines. Summary of the invention

[0004] The purpose of the present invention is to provide a visual inspection system for cigarette filter end faces of cigarette making machines to solve the above-mentioned problems in the prior art and to prevent cigarettes whose filter end faces do not meet the brand setting requirements from flowing into the next process during the production process.

[0005] The present invention provides a cigarette filter end face visual detection system for a cigarette making machine, which comprises:

[0006] A photoelectric switch, an intelligent camera, an illumination light source, an axial encoder and a controller, wherein the controller is connected to the photoelectric switch, the intelligent camera, the illumination light source and the axial encoder respectively; the photoelectric switch is arranged at the entrance of the detection drum wheel for detecting whether there is a cigarette; the intelligent camera is arranged in front of the entrance of the rejection drum wheel for detecting the cigarette filter to determine whether the cigarette filter is hollow, ordinary or filter-free; the illumination light source is connected to the intelligent camera for illuminating the intelligent camera; the axial encoder is coaxially connected to the detection drum wheel for generating a phase signal according to the running position of the detection drum wheel to locate the cigarette and trigger the photoelectric switch and the intelligent camera for detection.

[0007] In the cigarette filter end face visual inspection system for a cigarette making machine as described above, preferably, the smart camera comprises a miniature smart camera, the illumination light source comprises an annular illumination light source, and the miniature smart camera is fixed in an annular cavity of the annular illumination light source.

[0008] In the cigarette filter end face visual inspection system for cigarette making machines as described above, preferably, the smart camera and the illumination light source are installed in front of the entrance of the rejecting drum wheel via a first mounting bracket.

[0009] In the cigarette filter end face visual inspection system for cigarette making machines as described above, preferably, the photoelectric switch is installed at a position above the entrance of the inspection drum wheel via a second mounting bracket.

[0010] In the cigarette filter end face visual inspection system for a cigarette making machine as described above, preferably, the controller comprises a programmable logic controller.

[0011] In the cigarette filter end face visual inspection system for cigarette making machines as described above, preferably, the shaft encoder is mounted on the central axis of the inspection drum through a coupling.

[0012] As described above, the cigarette filter end face visual inspection system for cigarette making machines, wherein preferably, the cigarette filter end face visual inspection system for cigarette making machines further comprises a human-machine operation interface connected to the controller.

[0013] In the cigarette filter end face visual inspection system for a cigarette making machine as described above, preferably, the human-machine operation interface includes a touch screen.

[0014] As described above, the cigarette filter end face visual inspection system for cigarette making machines, wherein preferably, the cigarette filter end face visual inspection system also includes a rejection solenoid valve connected to the controller, which is arranged at the outlet position of the rejection drum wheel.

[0015] As described above, the visual inspection system for cigarette filter tip ends of cigarette making machines, wherein preferably, the visual inspection system for cigarette filter tip ends of cigarette making machines further comprises a rejection data statistics unit connected to the controller.

[0016] The present invention provides a cigarette filter end face visual inspection system for a cigarette making machine, which can effectively and in real time inspect the cigarette filter end faces one by one, thereby preventing cigarettes whose filter end faces do not meet the brand setting requirements in the production process from flowing into the next process, reducing the occurrence of quality accidents and the consumption of raw and auxiliary materials; the system has stable, efficient and reliable operation, low failure frequency, and is easy to adjust and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0018] Figure 1 A structural block diagram of an embodiment of a visual inspection system for cigarette filter ends of cigarette making machines provided by the present invention;

[0019] Figure 2 A flowchart of an embodiment of a visual inspection system for cigarette filter ends of cigarette making machines provided by the present invention;

[0020] Figure 3 This is a schematic structural diagram of an embodiment of a visual inspection system for cigarette filter ends of a cigarette making machine provided by the present invention.

[0021] Description of reference numerals:

[0022] 1-Rejection drum 2-Detection drum 3-Filter cigarette

[0023] 4-Photoelectric switch 5-Turn drum 6-Cigarette part

[0024] 7-Cigarette filter end 8-Smart camera 9-Light source

[0025] 10-First mounting bracket 11-Unqualified cigarettes 12-Rejection solenoid valve

[0026] 13-Human-machine interface 14-Axis encoder 15-Rejection data statistics unit

[0027] 16-Controller DETAILED DESCRIPTION

[0028] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0029] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprises" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be an intermediate component between the specific component and the first component or the second component. When a specific component is described as being connected to other components, the specific component may be directly connected to the other components without an intermediate component, or may not be directly connected to the other components but have an intermediate component.

[0031] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0033] In response to the problem that cigarette making machines cannot conduct comprehensive inspections on ordinary filter and hollow filter cigarettes in production one by one and cannot accurately remove defective cigarettes, the current equipment only has a missing filter detection device, which uses a photoelectric switch and can only detect whether there is a filter rod on a single cigarette, but cannot detect whether the filter rod is an ordinary filter or a hollow filter. Therefore, the use of this missing filter detection device cannot effectively identify hollow filters and ordinary filters, and cannot fundamentally prevent filter cigarettes that do not meet the brand setting requirements from flowing into the next process. It can be seen that at present, only filter-free cigarettes in the produced filter cigarettes can be effectively detected and removed, and ordinary filter and hollow filter cigarettes cannot be detected, and there is a risk that filter cigarettes that do not meet the brand setting requirements will flow into the next process.

[0034] like Figure 1 As shown, the embodiment of the present invention provides a cigarette filter end face visual detection system for a cigarette making machine, which includes: a photoelectric switch 4, an intelligent camera 8, an illumination light source 9, a shaft encoder 14 and a controller 16, wherein the controller 16 is connected to the photoelectric switch 4, the intelligent camera 8, the illumination light source 9 and the shaft encoder 14 respectively, as shown in FIG. Figure 3 As shown, the photoelectric switch 4 is arranged at the entrance of the detection drum 2, and is used to detect whether there is a cigarette. The smart camera 8 is arranged in front of the entrance of the rejection drum 1, and is used to detect the cigarette filter to determine whether the cigarette filter is hollow, ordinary or has no filter. The illumination light source 9 is connected to the smart camera 8, and is used to illuminate the smart camera 8. The shaft encoder 14 is coaxially connected to the detection drum 2, and is used to generate a phase signal according to the running position of the detection drum 2 to locate the cigarette and trigger the photoelectric switch 4 and the smart camera 8 for detection.

[0035] The output ends of the photoelectric switch 4, the smart camera 8 and the shaft encoder 14 are connected to the input end of the controller 16, and the smart camera 8 and the illumination light source 9 are installed in front of the entrance of the rejection drum 1 through the first mounting bracket 10. Specifically, the first mounting bracket adopts a "straight" opening and a "semi-circular" arc opening to meet the full-range position adjustment of the smart camera 8, such as up and down, left and right, high and low, so that the light emitted by the illumination light source 9 can be directly projected at the center of the filter, thereby making the smart camera 8 face the center of the cigarette.

[0036] Furthermore, the photoelectric switch 4 is installed above the entrance of the detection drum 2 through a second mounting bracket (not shown). The photoelectric switch 4 is used to detect whether the wrapped filter cigarettes have reached the detection drum area, and provide a judgment signal for the subsequent detection of whether there is a blockage in the drum area.

[0037] Furthermore, the photoelectric switch 4 , the smart camera 8 , the lighting source 9 and the shaft encoder 14 can be powered by a DC24V direct current power source taken from the electrical cabinet of the cigarette making machine.

[0038] At work, Figure 2As shown, the ZJ118 cigarette making machine unit is powered on, and the cigarette making machine cigarette filter tip end face visual detection system of the present invention is running. When the equipment is operating normally, the wrapped and formed filter tip cigarette arrives at the entrance of the detection drum 2 from the turning drum 5, and the photoelectric switch 4 above the detection drum 2 detects the filter tip cigarette. The photoelectric switch 4 outputs a high level and sends it to the controller 16. At the same time, the phase angle of the shaft encoder 14 is sent to the controller 16. The controller 16 shifts the phase of the cigarette by 200° (i.e., 20 slots of cigarette). When the filter tip cigarette arrives at the entrance of the rejection drum 1, the controller 16 outputs a signal to trigger the photo taking. The smart camera 8 installed at the entrance of the rejection drum 1 immediately detects the filter tip end face 7 of the cigarette in the slot, 6 is the cigarette part, wherein the photographing signal and the lighting stroboscopic triggering signal are derived from the phase signal sent to the controller 16 by the shaft encoder 14. Every 10°, the controller 16 outputs the triggering signal of the camera photographing and the lighting source stroboscopic. The photographed filter tip end face picture is processed by the smart camera 8, compared with the set parameters (grayscale, brightness, edge, etc.), and the high and low levels are output to the controller 16. If the filter tip end face does not meet the brand setting, it is a high level, and if it is a normal cigarette, it is a low level. The high and low levels output by the smart camera 8 to the controller 16 are used to determine whether the filter tip end of the cigarette meets the brand setting requirements (hollow filter tip or ordinary filter tip). It has high detection accuracy, stable, efficient and reliable operation, low failure frequency, and is easy to adjust and maintain.

[0039] After the photographed image is processed and compared, if its grayscale and brightness exceed the set values, it means that the filter of the cigarette does not meet the brand setting requirements (hollow filter or ordinary filter), and the smart camera 8 outputs a 24V high level to the controller 16. After the controller 16 shifts, it removes the unqualified cigarette on the rejection drum 1. Otherwise, the smart camera 8 outputs a low level signal to the controller 16, and the controller 16 does not output, and the cigarette reaches the next process from the rejection drum 1.

[0040] If the photoelectric switch 4 installed above the entrance of the detection drum 2 detects a filter cigarette, but the smart camera 8 installed in front of the rejection drum entrance has not detected a cigarette for 10 consecutive slots, the controller 16 immediately sends a stop signal and reports a red message "detection drum cigarette blockage". If the photoelectric switch 4 installed above the entrance of the detection drum 2 does not detect a filter cigarette, but the smart camera 8 installed in front of the rejection drum entrance has detected a filter cigarette for 10 consecutive slots, the controller 16 immediately sends a stop signal and reports a red message "cigarette detection photoelectric switch failure".

[0041] According to the requirements of the production brand, it can be set to ordinary filter detection and hollow filter detection. During production, the filter end face of each cigarette passing through the cigarette making machine's filter end face visual inspection system is inspected one by one. The filter cigarettes that do not meet the brand setting are effectively and accurately rejected on the rejection drum after being displaced.

[0042] Therefore, compared with the existing technology, the filter end faces of cigarettes can be effectively and real-timely inspected one by one, thereby preventing cigarettes whose filter end faces do not meet the brand setting requirements during the production process from flowing into the next process, reducing the occurrence of quality accidents and reducing the consumption of raw and auxiliary materials; the operation is stable, efficient, and reliable, with a low failure frequency, and easy adjustment and maintenance.

[0043] Further, the smart camera 8 includes a miniature smart camera, the illumination light source 9 includes an annular illumination light source, and the miniature smart camera is fixed in an annular cavity of the annular illumination light source.

[0044] Furthermore, in the present invention, the controller 16 is a programmable logic controller (PLC). In a specific implementation, the controller 16 can be an original machine PLC for shifting, rejecting unqualified cigarettes, alarming, etc. As an example but not limitation, the model of the PLC is Siemens S7-1200.

[0045] Furthermore, the cigarette making machine cigarette filter tip end face visual inspection system also includes a human-machine operation interface 13, which is connected to the controller 16 and is used for statistics of rejection data and adjustment of detection related parameters, display of alarm information, etc. The human-machine operation interface 13 includes a touch screen, which adopts a graphical software interface. In a specific implementation, the human-machine operation interface 13 is an original machine touch screen. As an example but not a limitation, the model of the touch screen is Sony SVF14A18SC. When the photoelectric switch 4 installed above the entrance of the detection drum 2 detects a filter tip cigarette, and the smart camera 8 installed in front of the rejection drum entrance does not detect a cigarette for 10 consecutive slots, a red message "detection drum cigarette blockage" is displayed on the human-machine operation interface 13; when the photoelectric switch 4 installed above the entrance of the detection drum 2 does not detect a filter tip cigarette, and the smart camera 8 installed in front of the rejection drum entrance detects a filter tip cigarette for 10 consecutive slots, a red message "cigarette detection photoelectric switch failure" is displayed on the human-machine operation interface 13.

[0046] Furthermore, the shaft encoder 14 is installed on the central axis of the detection drum 2 through a coupling. The shaft encoder 14 is mainly used to trigger detection and positioning processing of the photoelectric switch 4 and the smart camera 8, and its output provides a position detection phase pulse for the controller 16. When installing the shaft encoder 14, align the "0" position line on the detection drum 2 with the "0" position line at the base. At this time, the photoelectric switch 4 is facing the center point of the cigarette, and the smart camera 8 is facing the center position of the filter end face 7 of the cigarette. The shaft encoder 7 is displayed as "0°" on the human-machine operation interface 13. Each time the cigarette moves, the shaft encoder 14 rotates 10°. From the photoelectric switch 4 at the entrance of the detection drum 2 detecting the filter cigarette to the smart camera 8 detecting the cigarette, a total of 20 slots are shifted, that is, when the photoelectric switch 4 detects the cigarette at the "0°" phase, the smart camera 8 can detect the cigarette after "200°". Every 10° interval, the controller 16 sends a trigger photo signal sent by the shaft encoder 14 to the miniature smart camera. After taking the photo, the smart camera 8 processes and compares the photographed image and outputs high and low levels to the controller 16, thereby completing the detection and accurate removal of the entire cigarette filter end face. When adjusting the position of the smart camera 8 and the photoelectric switch 4, when the "0" line of the detection drum 2 is aligned with the "0" line of the base, the center position of the filter end face and the middle position of the cigarette are detected.

[0047] Furthermore, the cigarette filter end face visual inspection system of the cigarette making machine further comprises a rejection solenoid valve 12 connected to the controller 16, which is arranged at the outlet position of the rejection drum 1. The rejection solenoid valve 12 is connected to the output end of the controller 16, and the controller 16 controls the power on and off of the rejection solenoid valve 12. Specifically, Figure 3 As shown, the reject solenoid valve 12 is installed at the "8 o'clock" position of the reject drum 1, and uses high-pressure gas to blow out the unqualified cigarettes 11 from the reject drum 1.

[0048] Furthermore, the cigarette making machine cigarette filter end face visual inspection system also includes a rejection data statistics unit 15 connected to the controller 16 to count the rejected unqualified cigarettes and generate a statistical report and upload it for graphic display to remind operating and maintenance personnel, thereby preventing unqualified cigarettes from entering the next process.

[0049] The cigarette filter end face visual inspection system for cigarette making machines provided in the embodiment of the present invention can effectively and in real time inspect the filter end faces of cigarettes one by one, thereby preventing cigarettes whose filter end faces do not meet the brand setting requirements during the production process from flowing into the next process, reducing the occurrence of quality accidents and the consumption of raw and auxiliary materials; it operates stably, efficiently and reliably, has a low failure frequency, and is easy to adjust and maintain.

[0050] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0051] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A cigarette filter end face visual inspection system for cigarette making machines, characterized in that: include: A photoelectric switch, an intelligent camera, an illumination light source, an axis encoder and a controller, wherein the controller is connected to the photoelectric switch, the intelligent camera, the illumination light source and the axis encoder respectively; the photoelectric switch is arranged at the entrance of the detection drum wheel for detecting whether there is a cigarette; the intelligent camera is arranged in front of the entrance of the rejection drum wheel for detecting the end face of the cigarette filter tip to determine whether the cigarette filter tip is hollow, ordinary or has no filter tip; the illumination light source is connected to the intelligent camera for illuminating the intelligent camera; the axis encoder is coaxially connected to the detection drum wheel for generating a phase signal according to the running position of the detection drum wheel to locate the cigarette and trigger the photoelectric switch and the intelligent camera for detection; The wrapped cigarette reaches the entrance of the detection drum. If the photoelectric switch detects the cigarette, the photoelectric switch outputs a high level and sends it to the controller. At the same time, the phase angle of the shaft encoder is sent to the controller. After the controller controls the cigarette to shift, when it reaches the entrance of the rejection drum, the controller outputs a trigger photo signal to the smart camera according to the signal of the shaft encoder. The smart camera immediately detects the end face of the cigarette filter and outputs high and low levels to the controller. The cigarette filter that does not meet the brand requirements is set to a high level, and the normal cigarette is set to a low level. If the smart camera outputs a high level to the controller, the controller controls the rejection of unqualified cigarettes on the rejection drum after the cigarette is shifted. If the smart camera outputs a low level to the controller, the controller does not output, and the cigarette reaches the next process from the rejection drum. If the photoelectric switch installed above the entrance of the detection drum detects a cigarette, but the smart camera installed in front of the rejection drum entrance does not detect a cigarette for 10 consecutive slots, the controller immediately sends a stop signal and reports a red message "Detection drum cigarette blockage"; if the photoelectric switch installed above the entrance of the detection drum does not detect a cigarette, but the smart camera installed in front of the rejection drum entrance detects a cigarette for 10 consecutive slots, the controller immediately sends a stop signal and reports a red message "Cigarette detection photoelectric switch failure".

2. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The smart camera comprises a miniature smart camera, the illumination light source comprises an annular illumination light source, and the miniature smart camera is fixed in an annular cavity of the annular illumination light source.

3. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The smart camera and the illumination light source are installed in front of the entrance of the reject drum through a first mounting bracket.

4. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The photoelectric switch is installed at a position above the entrance of the detection drum wheel through a second installation bracket.

5. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The controller comprises a programmable logic controller.

6. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The shaft encoder is mounted on the central axis of the detection drum through a coupling.

7. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The cigarette filter end face visual detection system for cigarette making machines also includes a human-machine operation interface connected to the controller.

8. The cigarette filter end face visual inspection system for cigarette making machines according to claim 7, characterized in that: The human-machine operation interface includes a touch screen.

9. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The cigarette filter end face visual inspection system for cigarette making machines also includes a rejection solenoid valve connected to the controller and arranged at the outlet position of the rejection drum.

10. The cigarette filter end face visual inspection system for cigarette making machines according to claim 1, characterized in that: The cigarette filter end face visual inspection system for cigarette making machines also includes a rejection data statistics unit connected to the controller.

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