A cigarette end quality detection method based on laser imaging

Abstract

This invention belongs to the field of cigarette production and inspection technology, specifically relating to a method for detecting the quality of cigarette ends based on laser imaging. The method includes the following steps: emitting a laser beam into the cigarettes inside the cigarette box mold; a laser reflection sensor receiving the image of the cigarettes inside the mold; a laser detector detecting the cavity area on the surface of each cigarette end and determining the depth of each cavity; if the cavity depth is greater than a second set threshold and the cavity area is greater than or equal to a third set threshold, the cigarette is considered unqualified; if the cavity depth is greater than the second set threshold and the cavity area is less than the third set threshold, the cigarette is considered qualified. This technical solution uses a single laser detector and employs pixel and contrast discrimination rules to detect the regularity of cigarettes inside the mold in real time. When missing, inverted, or hollow cigarettes are detected, the system automatically rejects them, significantly reducing defects in cigarette end quality.

Description

Technical Field

[0001] This invention belongs to the field of cigarette production and testing technology, specifically relating to a method for detecting the quality of cigarette tip based on laser imaging. Background Technology

[0002] During the process of conveying cigarettes from the cigarette rolling machine to the packaging machine, due to unexpected factors, unqualified quality conditions such as missing cigarettes, upside-down cigarettes, and empty cigarettes are easily caused when they enter the box mold. These problems cannot be eliminated in time when the light source is insufficient, and will become the main factor affecting the quality of packaged cigarettes. Summary of the Invention

[0003] The purpose of this invention is to provide a method for detecting the quality of cigarette tip based on laser imaging, so as to solve the problems existing in the background art.

[0004] To achieve the above objectives, this application employs the following technical solution:

[0005] A method for detecting the quality of cigarette tip based on laser imaging includes the following steps:

[0006] S1. A laser beam is emitted into the cigarettes inside the box mold, and the laser reflection sensor receives the image of the cigarettes inside the box mold;

[0007] S2. The laser detector detects the cavity area on the surface of each cigarette tip and determines whether the sum of the cavity areas is greater than the first set threshold. If the sum of the cavity areas is not greater than the first set threshold, the process proceeds to step S3. If the sum of the cavity areas is not greater than the first set threshold, the cigarette is determined to be a qualified cigarette.

[0008] S3. Determine the value of the depth of each cavity. If the value of the cavity depth is less than the second set threshold, the cigarette is judged to be a qualified cigarette. If the cavity depth is greater than the second set threshold and the cavity area is greater than or equal to the third set threshold, the cigarette is judged to be unqualified. If the cavity depth is greater than the second set threshold and the cavity area is less than the third set threshold, the cigarette is judged to be a qualified cigarette.

[0009] Furthermore, when a cigarette is determined to be a qualified cigarette, if the cavity area at the ends of a set number of adjacent cigarettes is greater than a first set threshold, a maintenance message for the slitting blade is sent.

[0010] Furthermore, if the cavity area on the end surface of an adjacent set number of cigarettes is greater than the first set threshold, and the cavity depth is greater than the second set threshold, and the cavity area is greater than or equal to the third set threshold, then it is determined that the adjacent set number of cigarettes are all unqualified, and the tobacco parameter detection information is sent.

[0011] Furthermore, it also includes identifying missing or inverted cigarettes based on cigarette images and sending rejection information.

[0012] Furthermore, if the number of consecutive instances of missing cigarettes exceeds the fourth set threshold, a message is sent to check the cigarette order at the front end or to indicate a cigarette jam.

[0013] Furthermore, the rejection device for upside-down cigarettes is different from the rejection device for defective cigarettes.

[0014] The beneficial effects of this invention are:

[0015] 1. This invention utilizes the principle of laser imaging to significantly reduce the impact of natural light on the quality detection of cigarette ends during equipment operation.

[0016] 2. The graphic detector used in this invention is easy to install, requires little installation space, and can be applied to a variety of occasions.

[0017] 3. A laser detector is used to detect the regularity of cigarettes in the box mold in real time by using pixel and contrast discrimination rules. When missing cigarettes, upside-down cigarettes, or empty cigarettes are found, the system will automatically reject them, which will greatly reduce the quality defects of cigarette ends. Attached Figure Description

[0018] Figure 1 This is a flowchart of the quality inspection process for cigarette tip based on laser imaging, as described in this invention. Detailed Implementation

[0019] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, and should not be construed as limiting the technical solution of the present invention.

[0020] This technical solution uses laser imaging technology to detect the quality of the cigarette ends inside the box mold in real time. By emitting a laser beam to illuminate the cigarettes inside the box mold, the laser reflection sensor performs image recognition on the situation of missing cigarettes, inverted cigarettes, and empty cigarette ends, so as to remove unqualified cigarettes.

[0021] This application pertains to the process of packaging cigarettes after they have been rolled, slit by a cutting blade, and placed in a cigarette storage bin. The cigarettes are then processed by a box mold on a cigarette rolling machine. When the regularly arranged cigarettes enter the box mold, any missing, upside-down, or empty cigarettes must be removed. However, using natural light for inspection can lead to errors in judgment due to environmental changes.

[0022] like Figure 1 As shown, this application provides a method for detecting the quality of cigarette tip based on laser imaging, including the following steps:

[0023] S1.发射激光束至盒模内的烟支,激光器反射传感器接收盒模内烟支的图像。通过扫描滤嘴端和烟丝端构成的图像,系统能够自动检测出缺少烟支的缺陷并进行剔除。在本申请中,激光束照射烟头端,重点是对空头烟支进行剔除。

[0024] During production, the absence of filters is usually removed at the cigarette manufacturing stage, and cigarettes without filters will not enter the next process. However, specific detection is usually required to detect空头 cigarette butts at the cigarette end. This is mainly due to the uniformity of tobacco distribution during the cigarette rolling process and whether the cutting knife causes tobacco to fall off at the cigarette end during cutting, and these空头 cigarette butts have a greater impact on cigarette quality.

[0025] S2.激光检测器检测每个烟支端部表面的空穴面积,并进行判断。若空穴面积之和大于第一设定阈值,则进入步骤S3;若空穴面积之和不大于第一设定阈值,则判断该烟支为合格烟支。通常情况下,烟头端肯定会存在空穴,但如果是空穴较浅,对烟支质量没有影响。而空头烟支的空穴总面积一定大于设定阈值,这里指大于第一设定阈值,该第一设定阈值是通过实际测试并统计得到的数值。

[0026] S3.判断每个空穴深度的数值。若空穴深度的数值均小于第二设定阈值,则判断该烟支为合格烟支;若空穴深度大于第二设定阈值的空穴面积和大于等于第三设定阈值,则判断该烟支不合格;若空穴深度大于第二设定阈值的空穴面积小于第三设定阈值,则判断该烟支为合格烟支。因为空穴深度较大,对应的空穴在烟支端部较深部位也存在较大面积,此时会导致烟支端部的烟丝量较低,烟丝容易掉落从而影响烟支品质,需要进行剔除。

[0027] In this application, it also includes that when the cigarette is judged to be a qualified cigarette, if the cavity areas at the ends of adjacent cigarettes of a set number are all greater than the first set threshold, a message indicating that the cutting knife needs maintenance is sent. The specific number of adjacent cigarettes is set according to different types of cigarette machines. Because when a large number of consecutive cigarettes have cavity areas greater than the first set threshold, it is usually caused by some tobacco falling off as a result of the cutting by the cutting knife. At this time, a new cutting knife usually needs to be replaced to avoid the continuation of such a situation.

[0028] In this application, if the cavity area on the end surface of adjacent sets of a certain number of cigarette rods is greater than the first set threshold, and the sum of the cavity areas with a cavity depth greater than the second set threshold is greater than or equal to the third set threshold, and it is determined that adjacent sets of cigarette rods are all unqualified, information indicating that the tobacco parameters need to be detected is sent. Because the continuous occurrence of the situation where the cavity depth is greater than the second set threshold is usually caused by the removal of a relatively large amount of tobacco when the tobacco is distributed on the cigarette paper or when the leveling plate is leveling, and when this situation occurs, it is usually due to uneven mixing of the tobacco or the occurrence of agglomeration, etc. Therefore, information indicating that the tobacco parameters need to be detected is sent so that the staff can conduct corresponding inspections.

[0029] In this application, it also includes judging the missing cigarette rods and inverted cigarette rods of the cigarette rods through the cigarette rod images and sending rejection information. The rejection information here is divided into two types. One is the rejection for the missing cigarette rods in the carton mold. Here, when the number of missing cigarette rods in the carton mold is greater than the set value and it affects the subsequent small package packaging, some of the cigarette rods need to be completely rejected. At this time, the rejected cigarette rods are qualified cigarette rods. The other is the rejection of the inverted cigarette rods. At this time, the cigarette rods can usually also be understood as qualified cigarette rods. In order to avoid the impact on the production cost caused by mixing these cigarette rods with unqualified cigarette rods, these cigarette rods will be rejected into a special device and then replenished back into the cigarette rod warehouse.

[0030] In this application, the rejection device for rejecting the inverted cigarette rods is different from the rejection device for rejecting unqualified cigarette rods. Specifically, it at least includes two rejection devices. One rejection device is used to reject the inverted cigarette rods, and the other rejection device is used to reject unqualified cigarette rods.

[0031] In this application, it also includes that if it is judged that the number of consecutive occurrences of the situation of missing cigarette rods is greater than the fourth set threshold, information indicating checking the order of the front-end cigarette rods or the occurrence of cigarette jamming is sent.

[0032] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be covered within the protection scope of the present invention; those of ordinary skill in the art can make various changes and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is subject to the scope defined by the claims.

Claims

1. A method for detecting the quality of cigarette tip based on laser imaging, characterized in that, Includes the following steps: S1. A laser beam is emitted into the cigarettes inside the box mold, and the laser reflection sensor receives the image of the cigarettes inside the box mold; S2. The laser detector detects the cavity area on the surface of each cigarette tip and determines whether the sum of the cavity areas is greater than the first set threshold. If the sum of the cavity areas is not greater than the first set threshold, the process proceeds to step S3. If the sum of the cavity areas is not greater than the first set threshold, the cigarette is determined to be a qualified cigarette. S3. Determine the value of the depth of each cavity. If the value of the cavity depth is less than the second set threshold, the cigarette is judged to be a qualified cigarette. If the cavity depth is greater than the second set threshold and the cavity area is greater than or equal to the third set threshold, the cigarette is judged to be unqualified. If the cavity depth is greater than the second set threshold and the cavity area is less than the third set threshold, the cigarette is judged to be a qualified cigarette.

2. The method for detecting the quality of cigarette tip based on laser imaging according to claim 1, characterized in that, It also includes sending maintenance information to the slitting blade if the void area at the ends of a set number of adjacent cigarettes is greater than a first set threshold when the cigarette is judged to be a qualified cigarette.

3. The method for detecting the quality of cigarette tip based on laser imaging according to claim 1, characterized in that, If the cavity area on the end surface of an adjacent set number of cigarettes is greater than the first set threshold, and the cavity depth is greater than the second set threshold, and the sum of the cavity area and the third set threshold is greater than or equal to the third set threshold, then it is determined that the adjacent set number of cigarettes are all unqualified, and the tobacco parameter detection information is sent.

4. The method for detecting the quality of cigarette tip based on laser imaging according to claim 1, characterized in that, It also includes identifying missing or inverted cigarettes based on cigarette images and sending rejection information.

5. The method for detecting the quality of cigarette tip based on laser imaging according to claim 4, characterized in that, If the number of consecutive instances of missing cigarettes exceeds the fourth set threshold, a message is sent to check the cigarette order at the front end or to indicate a cigarette jam.

6. The method for detecting the quality of cigarette tip based on laser imaging according to claim 4, characterized in that, The rejection device for removing upside-down cigarettes is different from the rejection device for removing substandard cigarettes.

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