A conveying belt cleaning system for a cut tobacco production plant in a cigarette factory and a control method thereof

Abstract

The application discloses a conveying belt cleaning system for a silk making workshop of a cigarette factory, which comprises a cleaning mechanism, a lifting mechanism, a moving mechanism and a cleaning inspection mechanism, the moving mechanism is slidably arranged on a moving track, the cleaning mechanism is suspendedly installed on the moving mechanism through the lifting mechanism at the top of the cleaning mechanism, the cleaning mechanism comprises a cleaning frame, two groups of blowing assemblies are arranged below the cleaning frame, each blowing assembly comprises a nozzle capable of rotating leftward and rightward, compressed air is blown downward to the conveying belt through the nozzles of the blowing assemblies so that the conveying belt is cleaned, the cleaning inspection mechanism is arranged at the bottom of the cleaning frame, the cleaning inspection mechanism comprises an inspection frame, an inspection camera is arranged on the inspection frame, images of the conveying belt below are collected in real time through the inspection camera, and any group of air supply mechanisms of the cleaning inspection mechanism is controlled to act according to the image information. The application further discloses a control method of the system. Compared with the prior art, the application has the following advantages: automatic, rapid and complete cleaning of the conveying belt is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveyor belt cleaning system, in particular to a conveyor belt cleaning system for a cigarette factory primary processing workshop and a control method thereof. BACKGROUND

[0002] After production, there are usually a large amount of residual tobacco and dust on the conveyor belt in the primary processing workshop of a cigarette factory. The residual tobacco not only pollutes the next day's production, but also is very fine, and long-term retention will form dust and stains that are difficult to clean on the conveyor belt.

[0003] At present, the cleaning of residual tobacco on the conveyor belt mainly relies on manual cleaning. However, since the residual tobacco will generate dust, manual cleaning with compressed air will cause a large amount of dust in the field, thereby harming the health of the personnel on site. The layout of the tobacco product conveying device is not only on the ground, but also in the air and in a closed space. The existing manual cleaning operation not only consumes a long time, but also has certain safety hazards, and will delay the maintenance of subsequent other equipment to some extent. Therefore, it is necessary to improve the cleaning method of the conveyor belt. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art, and provides a conveyor belt cleaning system for a cigarette factory primary processing workshop and a control method thereof, so as to realize automatic, fast and thorough cleaning of the conveyor belt, and solve the problem that the residual material on the conveyor belt is difficult to clean.

[0005] The present application is realized by the following technical solutions:

[0006] A conveyor belt cleaning system for a cigarette factory primary processing workshop, comprising a cleaning mechanism, a lifting mechanism, a moving mechanism and a cleaning inspection mechanism, and a moving track extending in the front-rear direction is arranged on the top of the workshop;

[0007] The moving mechanism is slidably arranged on the moving track and can slide along the moving track in the front-rear direction;

[0008] The cleaning mechanism is located above the conveyor belt, and the cleaning mechanism is suspended and installed on the moving mechanism through the lifting mechanism on the top of the cleaning mechanism. The cleaning mechanism is lifted and lowered by the lifting mechanism. The cleaning mechanism comprises a cleaning frame, and two groups of blowing assemblies are arranged below the cleaning frame in the front-rear direction. Each blowing assembly comprises a nozzle capable of rotating left and right, and the nozzle is driven to rotate left and right by a cleaning rotary drive mechanism. The nozzles of the two groups of blowing assemblies are provided with compressed air by independent air supply mechanisms, and the nozzles of the blowing assemblies blow compressed air downward to the conveyor belt to clean the conveyor belt.

[0009] The cleaning inspection mechanism is arranged at the bottom of the cleaning frame and between the two groups of blowing assemblies, and comprises an inspection frame mounted at the bottom of the cleaning frame, wherein an inspection camera is arranged on the inspection frame, the lens of the inspection camera faces downward, a protective lens is mounted on the inspection frame and located below the lens of the inspection camera, the image of the conveying belt below is collected in real time by the inspection camera, and any group of air supply mechanisms of the cleaning inspection mechanism is controlled to act according to the image information.

[0010] As a preferred solution of the cleaning system, the nozzle comprises a nozzle body and a blowing head arranged at the bottom of the nozzle body, the nozzle body is rotatably mounted in the cleaning frame, the cleaning rotary driving mechanism comprises a cleaning rotary motor, the cleaning rotary motor is mounted in the cleaning frame, the output shaft of the cleaning rotary motor extends in the front-rear direction, the output shaft of the cleaning rotary motor is fixedly connected with the nozzle body, and the nozzle body is driven to rotate leftward and rightward by the output shaft of the cleaning rotary motor.

[0011] As a preferred solution of the cleaning system, the top of the nozzle body is provided with a connecting joint, the connecting joint is connected with a compressed air conveying pipe, the top of the cleaning frame is provided with an air supply port, and the compressed air conveying pipe extends out of the air supply port and is connected with the corresponding air supply mechanism.

[0012] As a preferred solution of the cleaning system, the cleaning inspection mechanism further comprises a lens cleaning mechanism for cleaning the protective lens, the lens cleaning mechanism comprises two groups of lens cleaning assemblies arranged on the left and right sides of the inspection frame, each group of lens cleaning assemblies comprises a lens cleaning fan blade and a lens cleaning motor, the lens cleaning motor is mounted on the inspection frame, the lens cleaning fan blade is fixedly mounted on the output shaft of the lens cleaning motor at the center, and the lens cleaning fan blades of the two groups of lens cleaning assemblies are located below the protective lens respectively.

[0013] As a preferred solution of the cleaning system, the lens cleaning mechanism further comprises two groups of lens cleaning fans arranged on the left and right sides of the inspection frame, and the air outlets of the lens cleaning fans face downward.

[0014] As a preferred solution of the cleaning system, the moving mechanism comprises a moving frame in sliding fit with the moving track, a plurality of roller shafts are arranged on the moving frame in front-rear arrangement in rotation, a plurality of moving motors are arranged to drive the plurality of roller shafts to rotate respectively, and the moving frame is driven to move along the moving track in the front-rear direction under the frictional action of the roller shafts and the top wall of the moving track.

[0015] As a preferred solution of the cleaning system, the lifting mechanism comprises two lifting cylinders arranged side by side, the piston rod of each lifting cylinder extends upward and is fixedly connected with the moving frame of the moving mechanism, and the cleaning frame is fixed at the bottom of the cylinder body of the two lifting cylinders.

[0016] As a preferred solution of the cleaning system, the lifting mechanism further comprises an auxiliary support structure, the auxiliary support structure comprises two groups of diamond-shaped telescopic structures, the workshop top is further provided with two suspension rods, the two suspension rods are located on the left and right sides of the moving track and each suspension rod extends along the front and back directions, the cleaning frame is provided with two slide rails on the left and right sides, the two slide rails are located on the left and right sides of the two cylinders and each slide rail extends along the front and back directions, the top of the two groups of diamond-shaped telescopic structures is respectively suspended on the two suspension rods, and the bottom of the two groups of diamond-shaped telescopic structures is respectively connected with the two slide rails of the cleaning frame; the top of each group of diamond-shaped telescopic structures is respectively hinged with an upper connecting block at the front and back ends, the two upper connecting blocks are respectively slidably sleeved on the corresponding side of the suspension rod, and the bottom of each group of diamond-shaped telescopic structures is respectively hinged with a lower connecting block at the front and back ends, and the two lower connecting blocks are respectively slidably matched with the slide rail on the corresponding side.

[0017] The application further discloses a control method of the conveying belt cleaning system in the cigarette factory silk-making workshop.

[0018] After the production is completed, the conveying belt stops running, the moving mechanism is started to move on the moving track, the forward direction of the moving mechanism is defined as the front direction, the spraying assembly located in the front direction in the two groups of spraying assemblies is defined as the front spraying assembly, the spraying assembly located in the rear direction is defined as the rear spraying assembly, the cleaning mechanism is driven by the moving mechanism to move forward, the gas supply mechanism of the front spraying assembly and the cleaning rotary driving mechanism are started at the same time, the nozzle of the front spraying assembly rotates and sprays compressed air, thereby cleaning the conveying belt below, the cleaning inspection mechanism is started at the same time, the conveying belt image of the position cleaned by the front spraying assembly is collected in real time by the inspection camera of the cleaning inspection mechanism, the gas supply mechanism and the cleaning rotary driving mechanism of the rear spraying assembly are controlled according to the obtained image information, when the image shows that there is secondary residual material on the cleaned conveying belt, the gas supply mechanism and the cleaning rotary driving mechanism of the rear spraying assembly are started, thereby realizing the point spraying and cleaning of the secondary residual material on the conveying belt.

[0019] As a preferred solution of the control method, the image collected by the inspection camera is processed by the image processing method of the industrial computer, and the image processing method comprises the following steps.

[0020] Step 1, the image collected by the inspection camera is processed by the gray scale formula EXG=200×g-150×r-b to obtain a gray scale image; wherein, EXG represents a gray scale characteristic value, r, g and b respectively represent red band pixel value, green band pixel value and blue band pixel value;

[0021] Step 2, the gray scale image is processed by a binaryzation method to obtain a binaryzation image;

[0022] Step 3, the specific process is that: presetting an area threshold of secondary residual image in the system, filtering out the image with the area of secondary residual image in the binary image less than the area threshold through a connected domain filtering algorithm, and taking the remaining binary image part as a filtered binary image;

[0023] Step 4, positioning the secondary residual image in the filtered binary image, and transmitting the position information of the secondary residual image to the industrial computer, the industrial computer planning a cleaning track of the rear blowing assembly according to the obtained position information of the secondary residual image, and the planning method of the cleaning track is as follows:

[0024] Step 401, contour extraction is performed on the secondary residual image in the filtered binary image to obtain an outer contour of the secondary residual image, taking the front-rear direction as the Y-axis direction and as the longitudinal coordinate, and taking the left-right direction as the X-axis direction and as the transverse coordinate, four points are extracted on the outer contour, the four points are the transverse coordinate maximum point, the longitudinal coordinate maximum point, the transverse coordinate minimum point and the longitudinal coordinate minimum point of the outer contour, and the four point coordinates are (a1, b1), (a2, b2), (a3, b3) and (a4, b4) in sequence;

[0025] Step 402, taking a straight line extending along the Y-axis direction through the transverse coordinate maximum point (a1, b1) as a first straight line, taking a straight line extending along the Y-axis direction through the transverse coordinate minimum point (a3, b3) as a second straight line, taking a straight line extending along the X-axis direction through the longitudinal coordinate maximum point (a2, b2) as a third straight line, and taking a straight line extending along the X-axis direction through the longitudinal coordinate minimum point (a4, b4) as a fourth straight line, the first straight line, the second straight line, the third straight line and the fourth straight line form a rectangular frame, the four vertices of the rectangular frame are vertex one, vertex two, vertex three and vertex four, and the coordinates of the four vertices are (a1, b2), (a3, b2), (a3, b4) and (a1, b4) in sequence;

[0026] Step 403, the gas supply mechanism and the cleaning rotary driving mechanism of the rear blowing assembly are controlled by the industrial computer to act, so that the nozzle of the rear blowing assembly starts blowing from the vertex three (a3, b4) as a starting point, and then sequentially passes through the vertex four (a1, b4), the transverse coordinate minimum point (a3, b3), the transverse coordinate maximum point (a1, b1), the longitudinal coordinate maximum point (a2, b2), and finally reaches the vertex one (a1, b2), ending the point blowing and cleaning process, and then the gas supply mechanism and the cleaning rotary driving mechanism of the rear blowing assembly are controlled by the industrial computer to be closed.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] The application provides a cigarette factory silk making workshop conveying belt cleaning system and a control method thereof. The cleaning mechanism of the cleaning system comprises two groups of blowing assemblies arranged in front and back. The conveying belt is blown by compressed air through the blowing assemblies, so that automatic cleaning of the conveying belt is realized. The nozzles of the blowing assemblies can rotate left and right, so that comprehensive cleaning of the conveying belt in the whole width direction is realized. Meanwhile, the cleaning mechanism is suspended on the moving mechanism through the lifting mechanism arranged at the top of the cleaning mechanism. The moving mechanism moves forward and backward, so that the whole cleaning mechanism can move forward and backward, thereby realizing comprehensive cleaning of the conveying belt in the whole length direction. The lifting mechanism is arranged to drive the whole cleaning mechanism to move up and down in the vertical direction, so that the height position of the cleaning mechanism is automatically adjusted to adapt to the cleaning requirements of conveying belts with different heights. In addition, the cleaning inspection mechanism is arranged at the bottom of the cleaning mechanism. The inspection camera of the cleaning inspection mechanism can collect images of the conveying belt below in real time, so that the conveying belt cleaned by the front blowing assembly can be inspected and reviewed. If there is secondary residual material, the rear blowing assembly can be controlled to move, so that the secondary residual material is blown at a fixed point, thereby ensuring thorough and effective cleaning of the conveying belt. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structure schematic diagram of the use state of the embodiment.

[0030] Figure 2 is a perspective view of the main part of the embodiment.

[0031] Figure 3 is a perspective assembly view of the moving mechanism and the moving track of the embodiment.

[0032] Figure 4 is a perspective view of the cleaning mechanism of the embodiment.

[0033] Figure 5 is an installation structure section view of the nozzle and the cleaning frame of the embodiment.

[0034] Figure 6 is a perspective view of the cleaning inspection mechanism of the embodiment.

[0035] Figure 7 is a perspective exploded view of the cleaning inspection mechanism of the embodiment.

[0036] Figure 8 is a binary image obtained after the image collected by the inspection camera is sequentially subjected to gray scale processing and binary processing.

[0037] Figure 9 is a filtered binary image obtained after the binary image of Figure 8 is subjected to noise filtering.

[0038] Figure 10is a reference schematic diagram of the planning method of the cleaning track of the embodiment.

[0039] Reference signs in the drawings:

[0040] 1 cleaning mechanism, 11 cleaning frame, 12 blowing assembly, 13 nozzle, 14 nozzle body, 15 blowing head, 16 cleaning rotary motor, 17 connecting joint, 18 compressed air delivery pipe, 19 air outlet, 110 sliding rail;

[0041] 2 lifting mechanism, 21 lifting cylinder, 22 piston rod, 23 rhombic telescopic structure, 24 suspension rod, 25 upper connecting block, 26 lower connecting block;

[0042] 3 movement mechanism, 31 movement frame, 32 roller shaft, 33 movement motor;

[0043] 4 cleaning and inspection mechanism, 41 inspection frame, 42 inspection camera, 43 protective lens, 44 lens cleaning fan blade, 45 lens cleaning motor, 46 lens cleaning blower;

[0044] 5 movement track, 51 groove;

[0045] 6 conveyor belt; DETAILED DESCRIPTION

[0046] The embodiment of the application will be described in detail below, which is implemented on the premise of the technical solution of the application, and detailed implementation and specific operation process are given, but the protection scope of the application is not limited to the following embodiments.

[0047] Referring to Figures 1 to 7 The embodiment discloses a conveyor belt cleaning system for a silk making workshop of a cigarette factory, which comprises a cleaning mechanism 1, a lifting mechanism 2, a movement mechanism 3, a cleaning and inspection mechanism 4, and a movement track 5 extending along the front-rear direction is arranged on the top of the workshop.

[0048] The movement mechanism 3 is slidably arranged on the movement track 5 and can slide along the movement track 5. The movement mechanism 3 comprises a movement frame 31 which is in sliding cooperation with the movement track 5, a plurality of roller shafts 32 which are arranged in front and back on the movement frame 31 in rotation, and a plurality of movement motors 33 which are used to drive the plurality of roller shafts 32 to rotate respectively. The roller shafts 32 and the top wall of the movement track 5 are in frictional contact, so that the movement frame 31 is driven to move along the movement track 5. The top wall of the movement track 5 is provided with a plurality of grooves 51 to increase the friction between the roller shafts 32 and the top wall of the movement track 5, prevent the two from slipping, and ensure the effective movement of the movement mechanism 3.

[0049] The cleaning mechanism 1 is located above the conveying belt 6, the top of the cleaning mechanism 1 is suspended and installed on the moving mechanism 3 through the lifting mechanism 2, and the cleaning mechanism 1 is lifted through the lifting mechanism 2. The cleaning mechanism 1 comprises a cleaning frame 11, and two groups of blowing assemblies 12 are arranged below the cleaning frame 11. Each group of blowing assemblies 12 comprises a nozzle 13 capable of rotating left and right, the nozzle 13 is driven to rotate left and right through a cleaning rotary drive mechanism, and the nozzles 13 of the two groups of blowing assemblies 12 are provided with compressed air through independent air supply mechanisms, and the nozzles 13 of the blowing assemblies 12 blow compressed air downward to the conveying belt 6 to clean the conveying belt 6.

[0050] The nozzle 13 comprises a nozzle body 14 and a blowing head 15 arranged at the bottom of the nozzle body 14, the nozzle body 14 is rotatably installed in the cleaning frame 11, the cleaning rotary drive mechanism comprises a cleaning rotary motor 16, the cleaning rotary motor 16 is installed in the cleaning frame 11, the output shaft of the cleaning rotary motor 16 extends in the front-rear direction, the output shaft of the cleaning rotary motor 16 is fixedly connected with the nozzle body 14, and the nozzle body 14 is driven to rotate left and right through the output shaft of the cleaning rotary motor 16. A connecting joint 17 is arranged at the top of the nozzle body 14, the connecting joint 17 is connected with a compressed air delivery pipe 18, an air supply port 19 is formed in the top of the cleaning frame 11, the compressed air delivery pipe 18 extends out of the air supply port 19 and is connected with the corresponding air supply mechanism.

[0051] The lifting mechanism 2 comprises two lifting cylinders 21 arranged side by side, the piston rod 22 of each lifting cylinder 21 extends upward and is fixedly connected with the moving frame 31 of the moving mechanism 3, and the cleaning frame 11 is fixed to the bottom of the cylinder body of the two lifting cylinders 21. The lifting mechanism 2 further comprises an auxiliary support structure, the auxiliary support structure comprises two groups of diamond-shaped telescopic structures 23, two suspension rods 24 are further arranged on the top of the workshop, the two suspension rods 24 are located on the left and right sides of the moving track 5 and extend in the front-rear direction, two slide rails 110 are arranged on the cleaning frame 11 and extend in the front-rear direction, the top of each group of diamond-shaped telescopic structures 23 is suspended on the corresponding suspension rod 24, and the bottom of each group of diamond-shaped telescopic structures 23 is connected with the corresponding slide rail 110 of the cleaning frame 11; the top of each group of diamond-shaped telescopic structures 23 is hingedly connected with an upper connecting block 25 at the front and rear ends, the two upper connecting blocks 25 are respectively and slidably sleeved on the corresponding suspension rod 24, the bottom of each group of diamond-shaped telescopic structures 23 is hingedly connected with a lower connecting block 26 at the front and rear ends, and the two lower connecting blocks 26 are respectively and slidably connected with the corresponding slide rail 110. The piston rod 22 of the two lifting cylinders 21 is telescopic, so as to drive the cleaning frame 11 to vertically ascend and descend; during the ascending and descending of the cleaning frame 11, the two groups of diamond-shaped telescopic structures 23 are adaptively telescopic, which can not only assist in supporting the cleaning frame 11, but also can buffer and stabilize, so as to ensure the stability of the cleaning frame 11 during the ascending and descending.

[0052] The cleaning and inspection mechanism 4 is arranged at the bottom of the cleaning frame 11 and between the two groups of blowing assemblies 12, and comprises an inspection frame 41 arranged at the bottom of the cleaning frame 11, and an inspection camera 42 arranged on the inspection frame 41 and having a lens facing downward. A protective lens 43 is arranged on the inspection frame 41 and below the lens of the inspection camera 42. The protective lens 43 can be a glass sheet. The inspection camera 42 is configured to acquire images of the conveying belt 6 below in real time, and the gas supply mechanism of any group of the cleaning and inspection mechanism 4 is controlled according to the image information.

[0053] The cleaning and inspection mechanism 4 further comprises a lens cleaning mechanism configured to clean the protective lens 43. The lens cleaning mechanism comprises two groups of lens cleaning assemblies arranged on the left and right sides of the inspection frame 41. Each group of lens cleaning assemblies comprises a lens cleaning fan blade 44 and a lens cleaning motor 45. The lens cleaning motor 45 is arranged on the inspection frame 41, and the lens cleaning fan blade 44 is fixedly arranged on the output shaft of the lens cleaning motor 45. The lens cleaning fan blades 44 of the two groups of lens cleaning assemblies are arranged below the protective lens 43, respectively. The lens cleaning mechanism further comprises two groups of lens cleaning blowers 46 arranged on the left and right sides of the inspection frame 41. The outlet of the lens cleaning blower 46 faces downward.

[0054] The embodiment further discloses a control method of the conveying belt cleaning system in the cigarette factory. The control method is based on the above cleaning system and is performed according to the following process.

[0055] After production is completed, the conveying belt 6 stops running, the action mechanism 3 is started to move on the action track 5, the forward direction of the action mechanism 3 is defined as the front direction, the blowing assembly 12 located in the front direction in the two groups of blowing assemblies 12 is defined as the front blowing assembly, and the blowing assembly 12 located in the rear direction is defined as the rear blowing assembly. The cleaning mechanism 1 is driven by the action mechanism 3 to move forward. At the same time, the gas supply mechanism of the front blowing assembly and the cleaning rotary driving mechanism are started to rotate and blow compressed air to the nozzle 13 of the front blowing assembly, so as to clean the conveying belt 6 below. At the same time, the cleaning and inspection mechanism 4 is started, the conveying belt 6 image of the part cleaned by the front blowing assembly is acquired in real time by the inspection camera 42 of the cleaning and inspection mechanism 4, the gas supply mechanism and the cleaning rotary driving mechanism of the rear blowing assembly are controlled according to the obtained image information, and the gas supply mechanism and the cleaning rotary driving mechanism of the rear blowing assembly are started to realize the point blowing and cleaning of the secondary residual material on the conveying belt 6 when the image shows that the secondary residual material exists on the cleaned conveying belt 6.

[0056] In the above control method, the image acquired by the inspection camera 42 is processed by the industrial computer through an image processing method. The image processing method comprises the following steps.

[0057] Step 1, the image collected by the inspection camera 42 is grayed by a gray scale formula EXG = 200 x g - 150 x r - b, to obtain a gray scale image; wherein, EXG represents a gray scale characteristic value, r, g, b represent red band pixel value, green band pixel value and blue band pixel value respectively;

[0058] Step 2, the gray scale image is binarized by a maximum inter-class variance algorithm to obtain a binarized image; the binarized image obtained by the maximum inter-class variance algorithm on the gray scale image in this embodiment is shown in Figure 8 ;

[0059] Step 3, the binarized image is filtered for noise points, and the specific process is as follows: an area threshold of secondary residue images is preset in the system, the images with an area of secondary residue images in the binarized image less than the area threshold are filtered out by a connected domain filtering algorithm, and the remaining part of the binarized image is taken as a filtered binarized image; the filtered binarized image obtained by filtering the binarized image in this embodiment is shown in Figure 9 ;

[0060] Step 4, the secondary residue images in the filtered binarized image are positioned, and the position information of the secondary residue images is transmitted to the industrial computer, and the industrial computer plans a cleaning track of the rear blowing assembly according to the obtained position information of the secondary residue images, as shown in Figure 10 , and the planning method of the cleaning track is as follows:

[0061] Step 401, the secondary residue images in the filtered binarized image are profiled to obtain the outer contour of the secondary residue images, the front and back direction is taken as the Y axis direction and as the longitudinal coordinate, the left and right direction is taken as the X axis direction and as the transverse coordinate, four points on the outer contour are extracted, the four points are the transverse coordinate maximum point, the longitudinal coordinate maximum point, the transverse coordinate minimum point and the longitudinal coordinate minimum point of the outer contour, and the four point coordinates are (a1, b1), (a2, b2), (a3, b3), (a4, b4) in sequence;

[0062] Step 402, a straight line passing through the transverse coordinate maximum point (a1, b1) and extending along the Y axis direction is taken as a first straight line, a straight line passing through the transverse coordinate minimum point (a3, b3) and extending along the Y axis direction is taken as a second straight line, a straight line passing through the longitudinal coordinate maximum point (a2, b2) and extending along the X axis direction is taken as a third straight line, and a straight line passing through the longitudinal coordinate minimum point (a4, b4) and extending along the X axis direction is taken as a fourth straight line, the first straight line, the second straight line, the third straight line and the fourth straight line form a rectangular frame, the four vertices of the rectangular frame are vertex one, vertex two, vertex three and vertex four, and the coordinates of the four vertices are (a1, b2), (a3, b2), (a3, b4), (a1, b4) in sequence;

[0063] Step 403, the industrial computer controls the gas supply mechanism and the cleaning rotary drive mechanism of the rear blowing assembly to act, so that the nozzle 13 of the rear blowing assembly starts blowing from the vertex three (a3, b4) as the starting point, and then passes through the vertex four (a1, b4), the horizontal coordinate minimum point (a3, b3), the horizontal coordinate maximum point (a1, b1), the vertical coordinate maximum point (a2, b2) in turn, and finally reaches the vertex one (a1, b2), ending this time of fixed-point blowing and cleaning process, that is, the second residual material which is not cleaned by the front blowing assembly can be thoroughly removed, and then the industrial computer controls the gas supply mechanism and the cleaning rotary drive mechanism of the rear blowing assembly to close, and the previous continuous cleaning state is restored.

[0064] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A control method for a conveyor belt cleaning system in a primary processing department of a cigarette factory, characterized in that: The control method is based on a conveying belt cleaning system of a cigarette factory primary processing workshop, which comprises a cleaning mechanism (1), a lifting mechanism (2), a moving mechanism (3), a cleaning inspection mechanism (4), and a moving track (5) extending in the front-rear direction is arranged on the top of the workshop; The moving mechanism (3) is slidably arranged on the moving track (5) and can slide along the moving track (5); The cleaning mechanism (1) is located above the conveying belt (6), the top of the cleaning mechanism (1) is suspendedly installed on the moving mechanism (3) through the lifting mechanism (2), and the cleaning mechanism (1) is lifted through the lifting mechanism (2); the cleaning mechanism (1) comprises a cleaning frame (11), two groups of blowing assemblies (12) are arranged below the cleaning frame (11), each group of blowing assemblies (12) comprises a nozzle (13) capable of rotating left and right, the nozzle (13) is driven to rotate left and right through a cleaning rotary drive mechanism, the nozzles (13) of the two groups of blowing assemblies (12) are provided with compressed air through independent air supply mechanisms, and the nozzles (13) of the blowing assemblies (12) blow compressed air downward to the conveying belt (6) below to clean the conveying belt (6); The cleaning inspection mechanism (4) is arranged at the bottom of the cleaning frame (11) and between the two groups of blowing assemblies (12), the cleaning inspection mechanism (4) comprises an inspection frame (41) installed at the bottom of the cleaning frame (11), an inspection camera (42) is arranged on the inspection frame (41), the lens of the inspection camera (42) faces downward, a protective lens (43) is installed on the inspection frame (41) and located below the lens of the inspection camera (42), the image of the conveying belt (6) below is collected in real time through the inspection camera (42), and any group of air supply mechanisms of the cleaning inspection mechanism (4) is controlled to act according to image information; The control method is performed according to the following process: After production is completed, the conveying belt (6) stops running, the moving mechanism (3) is started to move on the moving track (5), the forward direction of the moving mechanism (3) is defined as the front direction, the blowing assembly (12) located in the front direction in the two groups of blowing assemblies (12) is defined as the front blowing assembly, the blowing assembly (12) located in the rear direction is defined as the rear blowing assembly, the cleaning mechanism (1) is driven by the moving mechanism (3) to move forward; meanwhile, the air supply mechanism of the front blowing assembly and the cleaning rotary drive mechanism are started, the nozzle (13) of the front blowing assembly is rotated and blows compressed air, thereby blowing and cleaning the conveying belt (6) below; meanwhile, the cleaning inspection mechanism (4) is started, the image of the conveying belt (6) passing through the blowing and cleaning of the front blowing assembly is collected in real time through the inspection camera (42) of the cleaning inspection mechanism (4), the air supply mechanism and the cleaning rotary drive mechanism of the rear blowing assembly are controlled to act according to the obtained image information, when the image shows that there is secondary residual material on the cleaned conveying belt (6), the air supply mechanism and the cleaning rotary drive mechanism of the rear blowing assembly are started to realize the blowing and cleaning of the secondary residual material on the conveying belt (6) at a fixed point. The industrial computer processes the image collected by the inspection camera (42) through an image processing method, which includes the following steps: Step 1, the image collected by the inspection camera (42) is processed by the gray scale formula EXG = 200 * g - 150 * r - b, and a gray scale image is obtained; wherein EXG represents the gray scale characteristic value, r, g and b represent the red band pixel value, green band pixel value and blue band pixel value respectively; Step 2, the gray scale image is binarized to obtain a binary image; Step 3, the binary image is filtered for noise, and the specific process is as follows: the area threshold of the secondary residue image is preset in the system, and the image with an area smaller than the area threshold in the binary image is filtered out by the connected domain filtering algorithm, and the remaining binary image part is used as the filtered binary image; Step 4, the secondary residue image in the filtered binary image is located, and the position information of the secondary residue image is transmitted to the industrial computer, and the industrial computer plans the cleaning track of the rear blowing assembly according to the obtained secondary residue image position information, and the planning method of the cleaning track is as follows: Step 401, the contour of the secondary residue image in the filtered binary image is extracted to obtain the outer contour of the secondary residue image, and the front and rear directions are taken as the Y axis direction and the longitudinal coordinate, and the left and right directions are taken as the X axis direction and the transverse coordinate, four points are extracted on the outer contour, which are the maximum point of the transverse coordinate, the maximum point of the longitudinal coordinate, the minimum point of the transverse coordinate and the minimum point of the longitudinal coordinate, and the four point coordinates are (a1, b1), (a2, b2), (a3, b3) and (a4, b4) in turn; Step 402, the straight line passing through the maximum point of the transverse coordinate (a1, b1) and extending along the Y axis direction is the first straight line, the straight line passing through the minimum point of the transverse coordinate (a3, b3) and extending along the Y axis direction is the second straight line, the straight line passing through the maximum point of the longitudinal coordinate (a2, b2) and extending along the X axis direction is the third straight line, and the straight line passing through the minimum point of the longitudinal coordinate (a4, b4) and extending along the X axis direction is the fourth straight line, the first straight line, the second straight line, the third straight line and the fourth straight line form a rectangular frame, and the four vertices of the rectangular frame are vertex one, vertex two, vertex three and vertex four, and the coordinates of the four vertices are (a1, b2), (a3, b2), (a3, b4) and (a1, b4) in turn; Step 403, the gas supply mechanism and the cleaning rotary driving mechanism of the rear blowing assembly are controlled by the industrial computer to make the nozzle (13) of the rear blowing assembly start blowing from the vertex three (a3, b4) as the starting point, and then pass through the vertex four (a1, b4), the minimum point of the transverse coordinate (a3, b3), the maximum point of the transverse coordinate (a1, b1), the maximum point of the longitudinal coordinate (a2, b2) in turn, and finally reach the vertex one (a1, b2) to end this time of fixed point blowing and cleaning process, and then the gas supply mechanism and the cleaning rotary driving mechanism of the rear blowing assembly are controlled by the industrial computer to be closed.

2. A method of controlling a conveyor belt cleaning system in a cut tobacco production room of a tobacco factory as claimed in claim 1, characterized in that: The nozzle (13) comprises a nozzle body (14) and a blowing head (15) arranged at the bottom of the nozzle body (14), the nozzle body (14) is rotatably installed in the cleaning frame (11), the cleaning rotary driving mechanism comprises a cleaning rotary motor (16), the cleaning rotary motor (16) is installed in the cleaning frame (11), the output shaft of the cleaning rotary motor (16) extends in the front-rear direction, the output shaft of the cleaning rotary motor (16) is fixedly connected with the nozzle body (14), and the nozzle body (14) is driven to rotate left and right by the output shaft of the cleaning rotary motor (16).

3. A method of controlling a conveyor belt cleaning system in a cut tobacco production room of a tobacco factory as claimed in claim 2, characterized in that: The top of the nozzle body (14) is provided with a connecting joint (17), the connecting joint (17) is connected with a compressed air delivery pipe (18), the top of the cleaning frame (11) is provided with a blowing port (19), the compressed air delivery pipe (18) extends out of the blowing port (19) and is connected with a corresponding air supply mechanism.

4. A method of controlling a conveyor belt cleaning system in a cut tobacco manufacturing plant according to claim 1, characterized in that: The cleaning and inspection mechanism (4) further comprises a lens cleaning mechanism for cleaning the protective lens (43), the lens cleaning mechanism comprises two groups of lens cleaning assemblies arranged on the left and right sides of the inspection frame (41), each group of lens cleaning assemblies comprises a lens cleaning fan blade (44) and a lens cleaning motor (45), the lens cleaning motor (45) is installed on the inspection frame (41), the lens cleaning fan blade (44) is fixedly installed at the center of the output shaft of the lens cleaning motor (45), and the lens cleaning fan blades (44) of the two groups of lens cleaning assemblies are located below the protective lens (43) respectively.

5. A method of controlling a conveyor belt cleaning system in a cut tobacco production room of a tobacco factory as claimed in claim 4, characterized in that: The lens cleaning mechanism further comprises two groups of lens cleaning fans (46) arranged on the left and right sides of the inspection frame (41), and the air outlets of the lens cleaning fans (46) face downward.

6. A method of controlling a conveyor belt cleaning system in a cut tobacco manufacturing plant according to claim 1, characterized in that: The action mechanism (3) comprises an action frame (31) in sliding fit with the action track (5), a plurality of roller shafts (32) are arranged in front and back on the action frame (31) in rotation, a plurality of action motors (33) are arranged to drive the plurality of roller shafts (32) to rotate, and the action frame (31) is driven to move along the action track (5) in the front-rear direction under the friction between the roller shafts (32) and the top wall of the action track (5).

7. A method of controlling a conveyor belt cleaning system in a cut tobacco production room of a tobacco factory as claimed in claim 6, characterized in that: The lifting mechanism (2) comprises two lifting cylinders (21) arranged side by side, the piston rod (22) of each lifting cylinder (21) extends upward and is fixedly connected with the action frame (31) of the action mechanism (3), and the cleaning frame (11) is fixedly connected to the bottom of the cylinder body of the two lifting cylinders (21).

8. A method of controlling a conveyor belt cleaning system in a cut tobacco production room of a tobacco factory as claimed in claim 7, characterized in that: The lifting mechanism (2) further comprises an auxiliary support structure, the auxiliary support structure comprises two groups of left and right diamond telescopic structures (23), two suspension rods (24) are further arranged on the top of the vehicle shop, the two suspension rods (24) are located on the left and right sides of the moving track (5) and each suspension rod (24) extends in the front-rear direction, two slide rails (110) are arranged on the cleaning frame (11), the two slide rails (110) are located on the left and right sides of the two cylinders and each slide rail (110) extends in the front-rear direction, the top of the two groups of diamond telescopic structures (23) is respectively hung on the two suspension rods (24), and the bottom of the two groups of diamond telescopic structures (23) is respectively connected with the two slide rails (110) of the cleaning frame (11); the top of each group of diamond telescopic structures (23) is respectively hinged with an upper connecting block (25) at the front and rear ends, the two upper connecting blocks (25) are respectively slidably sleeved on the corresponding side suspension rod (24), and the bottom of each group of diamond telescopic structures (23) is respectively hinged with a lower connecting block (26) at the front and rear ends, and the two lower connecting blocks (26) are respectively in sliding fit with the corresponding side slide rail (110).

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