Adaptive Detection System for Finished Filter Rods Based on Filter Rod Forming Machine

Abstract

The present invention discloses an adaptive detection system for finished filter rods based on a filter rod forming machine, belonging to the technical field of intelligent tobacco manufacturing. The adaptive detection system utilizes the characteristic that the bursting beads are arranged at the cylindrical shaft position of the filter rod, irradiates the filter rod with laser light emitted by a plurality of laser emitters, and acquires an image of the other end of the filter rod through a second image acquisition unit to judge the influence on the transmission of the laser light in the filter rod. When there is an abnormality in the transmission of the laser light at one or more positions, it is considered that there is an abnormality or a possible abnormality in the position of the bursting beads in the corresponding filter rod, thereby discovering the filter rods with abnormal installation positions of the bursting beads. The whole process is automatic, with high efficiency and can meet the requirements of industrial production processes. In addition, compared with the prior art, even for transparent bursting beads, the present invention can also perform detection and analysis processing, with a wider scope of application.

Description

Technical Field

[0001] The present invention belongs to the technical field of tobacco intelligent manufacturing, and specifically, relates to an adaptive detection system for finished filter rods based on a filter rod forming machine. Background Art

[0002] Filter rods are an important part of cigarettes and can filter many harmful substances generated during cigarette use. With the development of the cigarette consumption market, in order to meet the needs of different users, a type of cigarette with a bursting bead added to the filter rod has emerged. By squeezing the bursting bead, the flavor additive in the bursting bead flows into the filter material of the filter rod, giving users a specific flavor when using it.

[0003] In order to ensure the uniformity of the flavor, it is necessary to ensure that the position of the bursting bead in the processed filter rod is as close as possible to the cylindrical axis position of the filter rod. In this way, when the bursting bead is crushed, the liquid in the bursting bead can diffuse more evenly, ensuring the uniformity of the taste. Since the bursting bead is inside the filter rod and not visible to the naked eye, the detection is difficult. To solve the above problems and provide a method for detecting whether the position of the bursting bead in the filter rod is on the cylindrical axis position of the filter rod, the present invention provides the following technical solutions. Summary of the Invention

[0004] The purpose of the present invention is to provide an adaptive detection system for finished filter rods based on a filter rod forming machine, which solves the problem in the prior art that it is impossible to confirm whether the position of the bursting bead in the filter rod is on the cylindrical axis position of the filter rod.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] The adaptive detection system for finished filter rods based on a filter rod forming machine includes:

[0007] A transmission unit for transmitting the formed filter rods;

[0008] A cigarette machine roller unit that rotates around the center of the circle and is used to adsorb the filter rods at equal intervals to achieve the transmission of the filter rods;

[0009] When the cigarette machine roller unit adsorbs and fixes the filter rod, the cylindrical axis of the filter rod is parallel to the cylindrical axis of the cigarette machine roller unit;

[0010] The cigarette machine roller unit pauses for a time t1 after moving a preset angle θ, where t1 is a preset value, and θ satisfies that when the cigarette machine roller unit moves the preset angle θ, the next filter rod is in the position of the previous filter rod before the cigarette machine roller unit moves the preset angle θ;

[0011] The laser emission unit includes a plurality of laser emitters. The laser emitters are used to emit a beam of laser, and the laser emitted by the laser emitters is parallel to the cylindrical axis of the filter rod adsorbed and fixed on the roller unit of the cigarette making machine;

[0012] The laser emitted by one of the laser emitters coincides with the cylindrical axis of the corresponding filter rod;

[0013] The landing points of the lasers emitted by the other several laser emitters on the corresponding filter rods are distributed in a circular array centered on the cylindrical axis of the filter rod;

[0014] After the filter rod is adsorbed and fixed on the roller unit of the cigarette making machine, as the roller unit of the cigarette making machine rotates, each time the same filter rod can only correspond to the position of one laser emitter;

[0015] The second image acquisition unit, when the laser emitted by the laser emitter irradiates on the filter rod and the position of the filter rod is fixed, acquires an image of the end of the filter rod different from the laser landing point through the second image acquisition unit and transmits it to the controller;

[0016] The controller is used to analyze the image information input by the second image acquisition unit and judge whether one axis of the bursting bead in the corresponding filter rod coincides or is close to coinciding with the cylindrical axis of the filter rod.

[0017] As a further solution of the present invention, when the position irradiated by the laser emitted by the laser emitter is not the position of the cylindrical axis of the filter rod, if the installation position of the bursting bead is normal, the laser irradiation path does not intersect with the bursting bead.

[0018] As a further solution of the present invention, the method for the controller to judge whether one axis of the bursting bead in the corresponding filter rod coincides with the cylindrical axis of the filter rod includes the following steps:

[0019] S1. After the filter rod transported on the transmission unit is adsorbed and fixed by the cigarette making machine roller, the cigarette making machine roller drives the filter rod to rotate. After the cigarette making machine roller unit rotates a preset angle θ, it pauses for a duration of t1. During the t1 time when the cigarette making machine roller stops moving, the laser emission unit emits laser beams, so that each laser beam has a landing point on each corresponding filter rod, and the second image acquisition unit acquires an image of the end of the filter rod different from the laser landing point, and marks this image as the mapping image of the corresponding filter rod;

[0020] S2. Obtain n mapping images corresponding to the same filter rod;

[0021] Where n is the number of laser emitters in the laser emission unit;

[0022] S3. For the n mapping images corresponding to one filter rod, after white balance and determining the focus area, obtain n focus images corresponding to the n mapping images;

[0023] The focus area refers to the end face area of the filter rod corresponding to the mapped image;

[0024] After processing each focus image, a grayscale image corresponding to each focus image is obtained;

[0025] S4. For a grayscale image, obtain the spatial distribution of the pixels with RGB values greater than the preset value μ in the grayscale image;

[0026] Mark the pixels with RGB values greater than the preset value μ as bright pixels;

[0027] Obtain the number k1 of bright pixels and the area Q1 of the coverage area of the bright pixels;

[0028] Obtain the standard grayscale image corresponding to the grayscale image, and obtain the number k2 of bright pixels and the area Q2 of the coverage area of the bright pixels in the standard grayscale image;

[0029] Calculate the coincidence coefficient R of the corresponding grayscale image according to the formula R = α1 * |k2 - k1| / k2 + α2 * Q3 / Q2;

[0030] Where α1 and α2 are both preset coefficients;

[0031] Q3 is the area of the overlapping area between the coverage area of the bright pixels in the corresponding grayscale image and the coverage area of the bright pixels in the standard grayscale image corresponding to the grayscale image;

[0032] S5. Calculate the coincidence coefficients R corresponding to the n focus images of the filter rod in sequence, and mark the n coincidence coefficients R corresponding to one filter rod as R1, R2,..., Rn in sequence;

[0033] When Ri ≤ Rj, it is considered that the corresponding focus image is abnormal;

[0034] Where 1 ≤ i ≤ n, and Rj is a preset value;

[0035] When the number of abnormal intersection images corresponding to one filter rod is more than g, it is considered that the position of the bursting beads in the corresponding filter rod is abnormal. When the number of abnormal intersection images corresponding to one filter rod is g, it is considered that the position of the bursting beads in the corresponding filter rod may be abnormal, and g is a preset value.

[0036] As a further solution of the present invention, the method for obtaining the standard grayscale image is:

[0037] Obtain the grayscale image obtained after the image collected by the second image acquisition unit when the filter rod with the normal installation position of the bursting beads is irradiated at the corresponding position by the laser irradiation unit is processed through the process of step S3;

[0038] For m grayscale images corresponding to the same position of a normal mouthpiece with different positions of the popping beads, these grayscale images are marked as reference grayscale images. When a bright pixel appears in m1 or more reference grayscale images, the corresponding bright pixel is marked as a reference pixel.

[0039] The area covered by the reference pixels is marked as the covered area of the corresponding standard grayscale image.

[0040] Where m1 / m ≥ σ, and σ is a preset value.

[0041] As a further aspect of the present invention, when it is found that the position of the popping bead in a mouthpiece may be abnormal or is abnormal, after marking the corresponding mouthpiece, the corresponding mouthpiece is removed to the corresponding position.

[0042] As a further aspect of the present invention, the above-mentioned adaptive detection system further includes a first image acquisition unit. The first image acquisition unit is arranged on one side of the roller unit of the cigarette making machine. During the t1 time when the roller unit of the cigarette making machine pauses, the side image of the mouthpiece at the corresponding position is acquired and transmitted to the controller.

[0043] The controller analyzes and processes the side image of the mouthpiece to obtain the length c and diameter d of the mouthpiece.

[0044] When |c - c1| / c1 > cy or |d - d1| / d1 > dy is satisfied, it is considered that the specification of the corresponding mouthpiece is abnormal. After marking the corresponding mouthpiece, during the subsequent transmission process, the corresponding mouthpiece is removed to the corresponding position by a pneumatic removal device.

[0045] Where c1 is the standard length of the mouthpiece and d1 is the marked diameter of the mouthpiece.

[0046] Both cy and dy are preset values.

[0047] The beneficial effects of the present invention:

[0048] 1. The present invention utilizes the characteristic that the popping bead is arranged at the cylindrical axis position of the mouthpiece. By irradiating the mouthpiece with laser light emitted by a plurality of laser emitters and acquiring the image of the other end of the mouthpiece through the second image acquisition unit, the influence on the laser transmission in the mouthpiece is judged. When the laser transmission at one or more positions is abnormal, it is considered that the position of the popping bead in the corresponding mouthpiece is abnormal or may be abnormal, so as to find the mouthpiece with abnormal popping bead installation position. The whole process is automatic, with high efficiency and can meet the requirements of the industrial production process.

[0049] 2. The present invention utilizes the influence of the spherical popping bead on the light propagation path to detect the position of the popping bead in the mouthpiece. Compared with the prior art, even for a transparent popping bead, it can be detected, analyzed and processed, and the applicable range is wider. Detailed implementation manners

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0051] Embodiment 1:

[0052] An adaptive detection system for finished filter rods based on a filter rod forming machine, comprising:

[0053] A transmission unit for transmitting the filter rods that have completed production after being opened, formed, cured, and launched;

[0054] A cigarette machine roller unit that rotates around the center of the circle and is used to adsorb the filter rods at equal intervals to achieve the transmission of the filter rods;

[0055] When the cigarette machine roller unit adsorbs and fixes the filter rod, the cylindrical axis of the filter rod is parallel to the cylindrical axis of the cigarette machine roller unit;

[0056] The cigarette machine roller unit pauses for a time t1 after moving a preset angle θ, where t1 is a preset value, and θ should satisfy that after the cigarette machine roller unit moves the preset angle θ, the latter filter rod is in the position of the former filter rod before the cigarette machine roller unit moves the preset angle θ;

[0057] A laser emission unit, including a plurality of laser emitters, the laser emitters are used to emit a beam of laser, and the laser emitted by the laser emitters is parallel to the cylindrical axis of the filter rod adsorbed and fixed on the cigarette machine roller unit;

[0058] When a filter rod adsorbed and fixed by the cigarette roller unit moves to a position corresponding to one of the laser emitters, the laser emitted by the laser emitter coincides with the cylindrical axis of the filter rod;

[0059] When a filter rod adsorbed and fixed by the cigarette machine roller unit moves to a position corresponding to other laser emitters, the landing points of the laser emitted by the other several laser emitters on the filter rod are distributed in a circular array centered on the cylindrical axis of the filter rod;

[0060] After the filter rod is adsorbed and fixed on the cigarette machine roller unit, as the cigarette machine roller unit rotates, the same filter rod can only correspond to the position of one laser emitter each time;

[0061] When the position irradiated by the laser emitted by the laser emitter is not the position of the cylindrical axis of the filter rod, if the installation position of the bursting beads is normal, the path of the laser irradiation does not intersect the bursting beads;

[0062] A second image acquisition unit, when the laser emitted by the laser emitter irradiates on the filter rod and the position of the filter rod is fixed, acquires an image of one end of the filter rod different from the laser landing point through the second image acquisition unit and transmits it to the controller;

[0063] A controller, which is used to analyze the image information input by the second image acquisition unit and judge whether one axis of the bursting beads in the corresponding filter rod coincides or is close to coinciding with the cylindrical axis of the filter rod;

[0064] The method for detecting the finished filter rod by the above-mentioned finished filter rod adaptive detection system includes the following steps:

[0065] S1. After adsorbing and fixing the filter rod transmitted on the transmission unit by the cigarette machine roller, drive the filter rod to rotate by the cigarette machine roller. After the cigarette machine roller unit rotates a preset angle θ each time, it pauses for a duration of t1. During the t1 time when the cigarette machine roller stops moving, emit laser beams through the laser emitting unit so that each laser beam has a landing point on each corresponding filter rod, and acquire an image of one end of the filter rod different from the laser landing point through the second image acquisition unit, and mark this image as the mapped image of the corresponding filter rod;

[0066] S2. Obtain n mapped images corresponding to the same filter rod;

[0067] Where n is the number of laser emitters in the laser emitting unit;

[0068] S3. For the n mapped images corresponding to one filter rod, after performing white balance and determining the focus area, obtain n focus images corresponding to the n mapped images;

[0069] The focus area refers to the end face area of the filter rod corresponding in the mapped image;

[0070] Process each focus image to obtain a grayscale image corresponding to each focus image;

[0071] S4. For one grayscale image, obtain the spatial distribution of the pixels with RGB values greater than the preset value μ in the grayscale image;

[0072] Mark the pixels with RGB values greater than the preset value μ as bright pixels;

[0073] Obtain the number k1 of bright pixels and the area Q1 of the coverage area of the bright pixels;

[0074] Obtain the standard grayscale image corresponding to this grayscale image, and obtain the number k2 of bright pixels and the area Q2 of the coverage area of the bright pixels in the standard grayscale image;

[0075] The coincidence coefficient R of the corresponding grayscale image is calculated according to the formula R = α1 * |k2 - k1| / k2 + α2 * Q3 / Q2;

[0076] where both α1 and α2 are preset coefficients;

[0077] Q3 is the area of the overlapping region between the covered area of the bright pixels in the corresponding grayscale image and the covered area of the bright pixels in the standard grayscale image corresponding to this grayscale image;

[0078] The method for obtaining the standard grayscale image is as follows:

[0079] Obtain the grayscale image obtained after the image collected by the second image acquisition unit is processed through the process of step S3 when the tipping paper with the normal installation position of the bursting bead (that is, one axis of the bursting bead coincides or is close to coinciding with the cylindrical axis of the tipping paper) is irradiated at the corresponding position by the laser irradiation unit;

[0080] For the m grayscale images corresponding to the same position of different tipping papers with normal bursting bead installation positions, mark these grayscale images as reference grayscale images. When a bright pixel appears in m1 or more reference grayscale images, mark the corresponding bright pixel as a reference pixel;

[0081] Mark the area covered by the reference pixels as the covered area of the corresponding standard grayscale image;

[0082] where m1 / m ≥ σ, and σ is a preset value;

[0083] In an embodiment of the present invention, σ is taken as 75%;

[0084] S5. Calculate the coincidence coefficients R corresponding to the n focal images of the tipping paper in sequence, and mark the n coincidence coefficients R corresponding to one tipping paper as R1, R2,..., Rn in sequence;

[0085] When Ri ≤ Rj, it is considered that the corresponding focal image is abnormal;

[0086] where 1 ≤ i ≤ n, and Rj is a preset value;

[0087] When the number of abnormal intersection images corresponding to one tipping paper is more than g, it is considered that the position of the bursting bead in the corresponding tipping paper is abnormal. When the number of abnormal intersection images corresponding to one tipping paper is g, it is considered that the position of the bursting bead in the corresponding tipping paper may be abnormal, and g is a preset value;

[0088] In an embodiment of the present invention, g is taken as 1;

[0089] When it is found that the position of the bursting beads in a filter rod may be abnormal, after marking the corresponding filter rod, the corresponding filter rod is removed to the corresponding position by a pneumatic rejection device to facilitate further inspection by the staff;

[0090] When it is found that the position of the bursting beads in a filter rod is abnormal, the corresponding filter rod is marked, and in the subsequent transmission process, the corresponding filter rod is removed to the corresponding position by a pneumatic rejection device;

[0091] In the present invention, taking advantage of the feature that the bursting beads are arranged at the cylindrical axis position of the filter rod, the filter rod is irradiated by several laser emitters, and the second image acquisition unit is used to acquire the image of the other end of the filter rod to judge the influence on the laser transmission in the filter rod. When the laser transmission at one or more positions is abnormal, it is considered that the position of the bursting beads in the corresponding filter rod is abnormal or may be abnormal, which is conducive to the discovery and treatment of filter rods with abnormal installation positions of bursting beads. The whole process is automatic, with high efficiency and can meet the requirements of the industrial production process;

[0092] Embodiment 2:

[0093] The finished filter rod adaptive detection system based on the filter rod forming machine according to the present invention further includes a first image acquisition unit. The first image acquisition unit is arranged on one side of the roller unit of the cigarette making machine. During the t1 time when the roller unit of the cigarette making machine pauses, the side image of the filter rod at the corresponding position is acquired and transmitted to the controller;

[0094] The controller analyzes and processes the side image of the filter rod to obtain the length c and diameter d of the filter rod;

[0095] When |c - c1| / c1 > cy or |d - d1| / d1 > dy, it is considered that the specification of the corresponding filter rod is abnormal. After marking the corresponding filter rod, in the subsequent transmission process, the corresponding filter rod is removed to the corresponding position by a pneumatic rejection device;

[0096] Where c1 is the standard length of the filter rod and d1 is the marked diameter of the filter rod;

[0097] Both cy and dy are preset values.

[0098] The above steps can quickly and automatically check the length and diameter of the filter rod, and prevent filter rods that do not meet the specifications from entering the subsequent processes.

[0099] In the description of the specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0100] The above content is only an illustration and description of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, as long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. An adaptive detection system for finished filter rods based on a filter rod forming machine, characterized in that, Comprising: A transmission unit for transmitting the formed filter rods; A cigarette making machine roller unit that rotates around the center of the circle and is used to adsorb the filter rods at equal intervals to achieve the transmission of the filter rods; When the cigarette making machine roller unit adsorbs and fixes the filter rods, the cylindrical axis of the filter rod is parallel to the cylindrical axis of the cigarette making machine roller unit; The cigarette making machine roller unit pauses for a time t1 after moving a preset angle θ, where t1 is a preset value, and θ satisfies that when the cigarette making machine roller unit moves a preset angle θ, the latter filter rod is in the position of the former filter rod before the cigarette making machine roller unit moves a preset angle θ; A laser emitting unit including a plurality of laser emitters. The laser emitters are used to emit a beam of laser, and the laser emitted by the laser emitters is parallel to the cylindrical axis of the filter rod adsorbed and fixed on the cigarette making machine roller unit; The laser emitted by one of the laser emitters coincides with the cylindrical axis of the corresponding filter rod; The laser spots of the other several laser emitters on the corresponding filter rods are distributed in a circular array centered on the cylindrical axis of the filter rod; After the filter rod is adsorbed and fixed on the cigarette making machine roller unit, as the cigarette making machine roller unit rotates, the same filter rod can only correspond to the position of one laser emitter each time; A second image acquisition unit. When the laser emitted by the laser emitter irradiates on the filter rod and the position of the filter rod is fixed, an image of the end of the filter rod different from the laser spot is acquired through the second image acquisition unit and transmitted to the controller; A controller for analyzing the image information input by the second image acquisition unit to judge whether an axis of the bursting beads in the corresponding filter rod coincides or is close to coinciding with the cylindrical axis of the filter rod.

2. The adaptive detection system for finished filter rods based on a filter rod forming machine according to claim 1, characterized in that, When the position irradiated by the laser emitted by the laser emitter is not the position of the cylindrical axis of the filter rod, if the installation position of the bursting beads is normal, the path of the laser irradiation does not intersect with the bursting beads.

3. The adaptive detection system for finished filter rods based on a filter rod forming machine according to claim 1, characterized in that, The method for the controller to judge whether an axis of the bursting beads in the corresponding filter rod coincides with the cylindrical axis of the filter rod includes the following steps: S1. After the cigarette making machine roller adsorbs and fixes the filter rod transmitted on the transmission unit, the cigarette making machine roller drives the filter rod to rotate. After the cigarette making machine roller unit rotates a preset angle θ each time, it pauses for a duration of t1. During the t1 time when the cigarette making machine roller stops moving, a laser beam is emitted through the laser emitting unit, so that each laser beam has a spot on each corresponding filter rod, and an image of the end of the filter rod different from the laser spot is acquired through the second image acquisition unit, and this image is marked as the mapping image of the corresponding filter rod; S2. Obtain n mapping images corresponding to the same filter rod; Where n is the number of laser emitters in the laser emitting unit; S3. For the n mapping images corresponding to one filter rod, after white balance and determining the focus area, n focus images corresponding to the n mapping images are obtained; The focus area refers to the end face area of the corresponding filter rod in the mapping image; After processing each focus image, a grayscale image corresponding to each focus image is obtained; S4. For a grayscale image, obtain the spatial distribution of the pixels with RGB values greater than a preset value μ in the grayscale image; The pixels with RGB values greater than the preset value μ are marked as bright pixels; Obtain the number k1 of bright pixels and the area Q1 of the coverage area of the bright pixels; Obtain the standard grayscale image corresponding to the grayscale image, and obtain the number k2 of bright pixels and the area Q2 of the coverage area of the bright pixels in the standard grayscale image; Calculate the coincidence coefficient R of the corresponding grayscale image according to the formula R = α1 * |k2 - k1| / k2 + α2 * Q3 / Q2; Where both α1 and α2 are preset coefficients; Q3 is the area of the overlapping area between the coverage area of the bright pixels in the corresponding grayscale image and the coverage area of the bright pixels in the standard grayscale image corresponding to the grayscale image; S5. Calculate the coincidence coefficients R corresponding to the n focal images of the filter rod in sequence, and label the n coincidence coefficients R corresponding to one filter rod as R1, R2, …, Rn in sequence; When Ri ≤ Rj, it is considered that the corresponding focal image is abnormal; Where 1 ≤ i ≤ n, and Rj is a preset value; When the number of abnormal intersection images corresponding to one filter rod is more than g, it is considered that the position of the bursting beads in the corresponding filter rod is abnormal. When the number of abnormal intersection images corresponding to one filter rod is g, it is considered that the position of the bursting beads in the corresponding filter rod may be abnormal, and g is a preset value.

4. The adaptive detection system for finished filter rods based on a filter rod forming machine according to claim 3, characterized in that, The method for obtaining the standard grayscale image is as follows: Obtain the grayscale image obtained after the image collected by the second image acquisition unit is processed through the process of step S3 when the filter rod with the normal bursting bead installation position is irradiated at the corresponding position by the laser irradiation unit; For the m grayscale images corresponding to the same position of different filter rods with normal bursting bead installation positions, label these grayscale images as reference grayscale images. When a bright pixel appears in m1 or more reference grayscale images, label the corresponding bright pixel as a reference pixel; Mark the coverage area of the reference pixels as the coverage area of the corresponding standard grayscale image; Where m1 / m ≥ σ, and σ is a preset value.

5. The finished filter rod self-adaptive detection system based on a filter rod forming machine according to claim 3, wherein, When it is found that the position of the bursting beads in a filter rod may be abnormal or is abnormal, after marking the corresponding filter rod, the corresponding filter rod is removed to the corresponding position.

6. The finished filter rod self-adaptive detection system based on a filter rod forming machine according to claim 1, wherein, It further includes a first image acquisition unit. The first image acquisition unit is arranged on one side of the roller unit of the cigarette making machine. During the t1 time when the roller unit of the cigarette making machine pauses, the side image of the filter rod at the corresponding position is collected and transmitted to the controller; The controller analyzes and processes the side image of the filter rod to obtain the length c and diameter d of the filter rod; When |c - c1| / c1 > cy or |d - d1| / d1 > dy is satisfied, it is considered that the specification of the corresponding filter rod is abnormal. After marking the corresponding filter rod, during the subsequent transmission process, the corresponding filter rod is removed to the corresponding position through a pneumatic removal device; Where c1 is the standard length of the filter rod, and d1 is the marked diameter of the filter rod; Both cy and dy are preset values.