CN111000286A - Anti-interference cigarette appearance quality online detection device and method - Google Patents
Anti-interference cigarette appearance quality online detection device and method Download PDFInfo
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- CN111000286A CN111000286A CN201911308077.4A CN201911308077A CN111000286A CN 111000286 A CN111000286 A CN 111000286A CN 201911308077 A CN201911308077 A CN 201911308077A CN 111000286 A CN111000286 A CN 111000286A
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
- A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
- A24C5/345—Removing defective cigarettes
Abstract
The invention relates to an anti-interference cigarette appearance quality online detection device and method. The invention relates to an anti-interference cigarette appearance quality online detection device, which is characterized in that a first detection module is arranged on the side surface of a first transmission drum wheel, the first detection module is used for shooting two or more pictures at different positions on one side surface of the same cigarette, the two or more pictures have overlapping areas, a second detection module is arranged on the side surface of a second transmission drum wheel, the second detection module is used for shooting two or more pictures at different positions on the other side surface of the same cigarette, and the two or more pictures have overlapping areas; the detection device further comprises an air blowing device, the air blowing device comprises an air outlet and a ventilation pipeline, and the ventilation pipeline is connected to the cavity for installing the detection module. The beneficial effects are as follows: the detection device can not only identify the interference of spray and sundries, but also effectively remove defective cigarettes.
Description
Technical Field
The invention relates to the field of cigarette online detection, in particular to an anti-interference cigarette appearance quality online detection device and method.
Background
In the modern cigarette production process, the production speed is faster and faster, the requirements of enterprises on the product quality are stricter and stricter, the quality of the appearance quality of cigarettes influences the selection of consumers to a certain extent, but in the actual production of the cigarettes, due to machine faults, the cigarettes are easy to have bad products such as stains, damaged cigarette paper, penetrated tobacco stems, poor splicing, no printing, printing position deviation, printing ink pollution and the like. Before the machine vision detection technology is used for detecting the appearance of a cigarette, the appearance quality of the cigarette can only be observed manually, and mainly in a spot check mode. The main function of manual sampling inspection is a rough evaluation of the overall quality of the batch of products, which cannot completely explain the detailed quality of the batch of products, and therefore, the manual sampling inspection has a great uncertainty factor. The reaction ability and the inspection state of each person are also different, when the quality of the cigarettes is inspected, the conditions of wrong inspection and missed inspection of the cigarettes sometimes occur, and the cigarettes with quality defects finally reach the hands of consumers after flowing into the next production process. The working method for manually sampling and inspecting the product quality also belongs to an initial quality inspection method, which wastes manpower and material resources, cannot ensure that the product quality is completely inspected, cannot well guarantee the product quality and economic benefit of an enterprise, and is bound to the market competitiveness of the enterprise product.
Based on the development of machine vision technology, some think of taking a picture with the camera to judge whether cigarette outward appearance is defective, in order to replace the technical problem that artifical detection efficiency is low, but the following problem has always existed: 1) when the lens of the camera is attached with impurities, all cigarettes are identified as defective cigarettes, all cigarettes are completely removed, and the tobacco shred ends of the cigarettes are driven by the high-speed rotating drum wheel, so that much droplets and impurities are generated, and the phenomenon cannot be avoided; 2) the inevitable spray exists between the camera lens and the cigarette, and the camera can regard the spray as the cigarette defect, so that the normal cigarette is rejected. For the reasons, the false rejection rate of cigarettes is always high. Therefore, a technical prejudice exists in cigarette factories and equipment suppliers for a long time, namely the problem that the cigarette appearance defects are detected on line by using a camera, the cigarette cannot be actually used on a cigarette making machine, and the problem of high false rejection rate cannot be solved all the time. Therefore, the visual technology is only used for detecting missing cigarette, missing mouth, empty head, reverse cigarette and the like in the cigarette packet in the tobacco field.
Therefore, through a large number of experimental researches, the on-line cigarette appearance quality detection method and the device which can not only avoid the false judgment of normal cigarettes as defective cigarettes, but also accurately identify the cigarette appearance defects, have high precision rate and high detection efficiency, are easy to maintain and overhaul and can resist the interference of droplets and sundries are provided, and are the innovation of the invention.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the cigarette appearance quality online detection method and the cigarette appearance quality online detection device which can not only avoid the false judgment of a normal cigarette as a defective cigarette, but also accurately identify the cigarette appearance defects, have high accuracy rate and high detection efficiency, are easy to maintain and overhaul and can resist the interference of droplets and sundries.
The invention provides an anti-interference cigarette appearance quality online detection device, which adopts the technical scheme that:
an anti-interference cigarette appearance quality online detection device comprises a first detection module, a second detection module, a first transmission drum wheel and a second transmission drum wheel, wherein the first transmission drum wheel is adjacent to the second transmission drum wheel; the detection device further comprises an air blowing device, the air blowing device comprises an air outlet and a ventilation pipeline, and the ventilation pipeline is connected to the cavity for installing the detection module.
Preferably, the first detection module comprises a light source for irradiating the cigarette, a first photographing device for photographing the cigarette and a second photographing device, and the first photographing device and the second photographing device are arranged in one outer cover; the second detection module comprises a light source for irradiating the cigarettes, a third photographing device and a fourth photographing device for photographing the cigarettes, and the third photographing device and the fourth photographing device are arranged in a housing; the first photographing device and the second photographing device respectively photograph one side surface of the same cigarette at different positions of the first conveying drum wheel; the third photographing device and the fourth photographing device respectively photograph the other side surface of the same cigarette at different positions of the second conveying drum wheel;
or the first detection module and the second detection module respectively comprise a light source for irradiating the cigarettes and a photographing device for photographing the cigarettes; the photographing device of the first detection module photographs more than two times one side surface of the same cigarette at different positions of the first conveying drum wheel; the photographing device of the second detection module photographs the other side surface of the same cigarette more than twice at different positions of the second transmission drum wheel.
Preferably, the included angle between the picture collecting directions of the same side face of the same cigarette is less than 75 degrees; two pictures shot from the same side of the same cigarette have more than 80% of overlapping area.
Preferably, the photographing device is a line CCD camera or an area CCD camera; two LED strip light sources are arranged around the camera.
An anti-interference cigarette appearance quality online detection method comprises the steps that a first detection module is installed on the side face of a first conveying drum wheel, a second detection module is installed on the side face of a second conveying drum wheel, the first conveying drum wheel is adjacent to the second conveying drum wheel, and a first photographing device and a second photographing device are arranged inside the first detection module and used for photographing a picture of one side face of the same cigarette; a third photographing device and a fourth photographing device are arranged in the second detection module and are used for photographing pictures of the other side face of the same cigarette;
the method comprises the following steps: the first photographing device photographs one or more pictures of one side face of a cigarette at a first position of the first conveying drum wheel, the second photographing device photographs one or more pictures of one side face of the same cigarette at a second position of the first conveying drum wheel, and the pictures photographed by the first photographing device and the second photographing device have a superposition area; the third photographing device photographs one or more pictures of the other side face of the cigarette at the third position of the second conveying drum wheel, the fourth photographing device photographs one or more pictures of the other side face of the cigarette at the fourth position of the second conveying drum wheel, and the pictures photographed by the first photographing device and the second photographing device have a superposition area.
Preferably, the first photographing device and the second photographing device photograph the two cigarettes on the first position and the second position simultaneously, the third photographing device and the fourth photographing device photograph the two cigarettes on the third position and the fourth position simultaneously, and the photos of the two cigarettes can be photographed at one time.
Preferably, an included angle between the picture collecting directions of the first photographing device and the second photographing device is less than 75 degrees; an included angle between the image acquisition directions of the third photographing device and the fourth photographing device is less than 75 degrees;
the two pictures shot by the first shooting device and the second shooting device have more than 80% of overlapping area; the two pictures shot by the third shooting device and the fourth shooting device have the coincidence area of more than 80 percent.
Preferably, when a cigarette photo is taken, external compressed air is introduced into the detection cavity, positive pressure is formed in the cavity, and external dust and smoke can not enter the detection cavity; compressed air blows out through the gas outlet, blows away cigarette foam, debris on the device surface of shooing, reduces the interference to do benefit to the heat dissipation.
The implementation of the invention comprises the following technical effects:
the invention adopts two detection modules to detect two side surfaces of the same cigarette, each detection module is internally provided with two photographing devices, two adjacent photographing devices successively photograph the same cigarette at different positions in a very short time, because the included angle between the image acquisition directions of the two cameras is less than 75 degrees, a 'coincident' part is inevitably existed in the two images, if spray exists between the camera and the cigarette, the movement speed and the movement direction of the spray are not consistent with the movement speed and the movement direction of the cigarette driven by a cigarette machine, so in the two images with time difference or space difference, the spray and the defect can be distinguished through the position change of the image spot (for example, the image spot is at different positions of the cigarette, the spray is identified, and the two images are still identified as normal cigarettes though the defects exist on the two images). On the other hand, the position of the two cameras is different between the cameras and the cigarette, and the position of the droplets projected on the cigarette also changes (for example, if one picture is dirty, and if one picture is not, the cigarette is identified as the droplets, and although one picture is defective, the cigarette is also identified as the normal cigarette). In addition, if sundries are attached to any one camera lens, one picture has black spots, and the other picture does not have the black spots, and the picture is also determined to be a normal cigarette in the situation. If sundries exist on the two cameras, the black points of the two pictures are different in position, and the two pictures are also considered to be normal cigarettes. By the technical scheme of the invention, false detection can be avoided. That is to say, only the picture of gathering has "coincidence", can discern the cigarette foam dust that the space that the debris or the getting for instance exist on the lens surface through the picture of "coincidence", avoid rejecting the cigarette that does not have appearance defect, reduce the mistake rate of picking to improve the detection precision and the detection rate of device.
Through setting up the air-blowing device, can blow away droplet, debris, reduce the interference, still do benefit to the heat dissipation.
The detection device has high detection efficiency, can detect 1.2 ten thousand cigarettes (5 milliseconds/cigarette) at most every minute, and has high rejection rate and small false rejection rate of defective cigarettes. The machine vision technology is adopted to realize the online real-time comprehensive detection of the appearance quality of the finished cigarettes and eliminate defective cigarettes in time. The labor intensity of inspectors can be greatly reduced, the product quality is improved, the labor cost and the management cost of a cigarette factory are reduced, and the enterprise image is improved.
Drawings
FIG. 1 is a schematic side structure view of an anti-interference cigarette appearance quality online detection device according to an embodiment of the present invention.
FIG. 2 is a schematic perspective view of an anti-interference cigarette appearance quality online detection device according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of the first photographing device photographing the same cigarette picture at the first position of the first conveying drum.
Fig. 4 is a schematic view of the second photographing device photographing the same cigarette picture at the second position of the first conveying drum.
FIG. 5 is a schematic view of a third photographing apparatus photographing the same cigarette at a third position of the second conveying drum.
Fig. 6 is a schematic view of the fourth photographing device photographing the same cigarette picture at the fourth position of the second conveying drum.
FIG. 7 is a schematic view of the side view of the online inspection device with an air blowing device.
Fig. 8 is a schematic diagram of a picture of the same cigarette taken by the detection device (8A is the same cigarette a side, and 8B is the same cigarette B side).
FIG. 9 is a schematic diagram illustrating the detection of a defect type of a cigarette.
In the figure: 1. a first detection module; 2. a second detection module; 3. a first transfer drum; 4. a second transfer drum; 5. a first position; 6. a second position; 7. a third position; 8. a fourth position; 9. a compressed air generating device; 10. a vent line; 11. the overlapping area; a1, a picture obtained by the first photographing device; a2, a picture obtained by the second photographing device; b1, a photograph obtained by the third photographing device; b2, and the fourth photographing device.
Detailed Description
The present invention will be described in detail below with reference to embodiments and drawings, it being noted that the described embodiments are only intended to facilitate the understanding of the present invention, and do not limit it in any way.
In the cigarette production process, a large amount of scattered tobacco powder falls and splashes everywhere, which is an unsolved practical problem. When the droplets are between the camera and the cigarette, the droplets or the surface defects of the cigarette cannot be distinguished from each other by looking at one picture. If sundries are attached to the surface of the lens of any one camera, the synthesized picture is fed back to the computer and has defects, the synthesized picture is different from the normal picture and can be judged as unqualified cigarettes by the computer by mistake, and the problem can cause that large batches of qualified cigarettes are judged as unqualified cigarettes until a technician finds the problem and can recover to be normal after cleaning the lens of the camera, and a large quantity of qualified cigarettes are judged as unqualified cigarettes by mistake; not only increases the production cost of enterprises, but also reduces the production efficiency. The cigarette factory is profound to pain.
In view of the above technical problems, the present embodiment provides an anti-interference cigarette appearance quality online detection device, as shown in fig. 1 and fig. 2, including a first detection module 1, a second detection module 2, a first transmission drum 3, and a second transmission drum 4, where the first transmission drum 3 is adjacent to the second transmission drum 4, the first detection module 1 is installed on a side surface of the first transmission drum 3, the first detection module 1 is used to take two or more pictures of one side surface of a same cigarette at different positions, the two or more pictures have an overlapping area 11, the second detection module 2 is installed on a side surface of the second transmission drum 4, the second detection module 2 is used to take two or more pictures of another side surface of the same cigarette at different positions, and the two or more pictures have an overlapping area 11; referring to fig. 7, the detection device further includes an air blowing device, the air blowing device includes an air outlet and a ventilation pipeline 10, the air outlet is connected to the compressed air generation device 9 through the ventilation pipeline 10, the ventilation pipeline 10 is connected to a cavity for installing the detection module, and the cavity is filled with external compressed air to blow away droplets and impurities and facilitate heat dissipation.
As an implementation mode of the multi-phase machine detection, the first detection module 1 comprises a light source for irradiating the cigarette, a first photographing device and a second photographing device for photographing the cigarette, and the first photographing device and the second photographing device are arranged in a housing; the second detection module 2 comprises a light source for irradiating the cigarettes, a third photographing device and a fourth photographing device for photographing the cigarettes, and the third photographing device and the fourth photographing device are arranged in a housing; the first photographing device and the second photographing device respectively photograph one side surface of the same cigarette at different positions of the first conveying drum wheel 3; the third photographing device and the fourth photographing device respectively photograph the other side surface of the same cigarette at different positions of the second conveying drum wheel 4. In fig. 8, fig. 8A is two pictures of a surface a of the same cigarette, a1 is a picture obtained by a first photographing device, a2 is a picture obtained by a second photographing device, the two pictures have a coincidence area 11 after being combined, the coincidence area 11 can be used for identifying the interference of smoke dust and impurities, and the two pictures can also obtain the cigarette pictures as complete as possible to find out the defective cigarette; fig. 8B is two pictures of the B surface of the same cigarette, B1 is a picture obtained by the first photographing device, B2 is a picture obtained by the second photographing device, the two pictures have a coincidence area 11 after being combined, the interference of the cigarette foam and the impurities can be identified by utilizing the coincidence area 11, and the two pictures can also obtain the cigarette pictures which are as complete as possible to find out the defective cigarette.
As a detection implementation mode of two-time imaging of a single camera, the first detection module 1 and the second detection module 2 respectively comprise a light source for irradiating cigarettes and a photographing device for photographing the cigarettes; the photographing device of the first detection module 1 photographs more than two times one side surface of the same cigarette at different positions of the first conveying drum wheel 3; the photographing device of the second detection module 2 photographs the other side surface of the same cigarette more than twice at different positions of the second transmission drum wheel 4.
In the two embodiments, the included angle between the picture collecting directions of the same side face of the same cigarette is smaller than 75 degrees, the included angle between the picture collecting directions is limited to be an acute angle, specifically smaller than 75 degrees, the change of the real cigarette defects in the two figures is small, the calibration can be better carried out in the picture processing, the change of the cigarette defects after the image taking angle is selected is regular, and on the contrary, the change of sundries or cigarette foam is irregular; two pictures shot from the same side of the same cigarette have the overlapping area 11 of more than 80 percent. Preferably, the included angle between the picture collecting directions of the same side surface of the same cigarette is 1 to 70 degrees.
The invention adopts two detection modules to detect two side surfaces of the same cigarette, each detection module is internally provided with two photographing devices, two adjacent photographing devices successively photograph the same cigarette at different positions in a very short time, because the included angle between the image acquisition directions of the two cameras is less than 75 degrees, a 'coincident' part is inevitably existed in the two images, if spray exists between the camera and the cigarette, the movement speed and the movement direction of the spray are not consistent with the movement speed and the movement direction of the cigarette driven by a cigarette machine, so in the two images with time difference or space difference, the spray and the defect can be distinguished through the position change of the image spot (for example, the image spot is at different positions of the cigarette, the spray is identified, and the two images are still identified as normal cigarettes though the defects exist on the two images). On the other hand, the position of the two cameras is different between the cameras and the cigarette, and the position of the droplets projected on the cigarette also changes (for example, if one picture is dirty, and if one picture is not, the cigarette is identified as the droplets, and although one picture is defective, the cigarette is also identified as the normal cigarette). In addition, if sundries are attached to any one camera lens, one picture has black spots, and the other picture does not have the black spots, and the picture is also determined to be a normal cigarette in the situation. If sundries exist on the two cameras, the black points of the two pictures are different in position, and the two pictures are also considered to be normal cigarettes. By the technical scheme of the invention, false detection can be avoided. That is to say, only the picture of gathering has "coincidence", can discern the cigarette foam dust that the space that the debris or the getting for instance exist on the lens surface through the picture of "coincidence", avoid rejecting the cigarette that does not have appearance defect, reduce the mistake rate of picking to improve the detection precision and the detection rate of device.
The reason for limiting to shoot at different positions is that the cigarette is shot twice by using two cameras at the same position, if the cigarette foam is close to the cigarette, the black point pictures of the cigarette foam on the pictures shot at the same position are also close, so that the defect is considered to be mistakenly removed, but if the pictures are shot at different positions, when the cigarette is turned to the other position, the cigarette foam cannot fly to the upper part of the cigarette at the other position synchronously, so that a picture with the black point and a picture without the black point can be obtained, the cigarette foam can be well identified, and the false detection when the cigarette foam is close to the cigarette is avoided.
Specifically, the photographing device selects a linear array CCD camera or an area array CCD camera. The linear array CCD camera is optimized, the detected object is a cigarette on a drum wheel, the detected visual field is in a long and thin strip shape, the cigarette rotates on the detection drum at a high speed, the cigarette can be approximately considered to move in parallel at a high speed (the tangential direction) relative to the visual field of the camera, the linear array camera can acquire a complete and clear cigarette surface development picture, the edge imaging effect of the cigarette of the linear array camera is superior to that of an area array mode, the linear array cameras with high frequency acquisition speed are relatively more, and the type selection of devices is easy. Two LED strip light sources are arranged around the camera. Two LED light sources are adopted, 5 pixels can be thinned to the state that the line-carving width is 0.1mm, imaging meets the requirement, and a certain speed-up space is provided. The LED strip light source is easy to install and high in brightness; the heat dissipation is good: the luminous body of the linear light source is generally a high-power LED, when the linear light source works, a large current passes through an LED chip junction to enable the LED chip junction to emit light, and meanwhile, as only 10% -15% of input power is converted into light energy to be output, high heat cannot be generated. The uniformity is good: the selected light source adopts a condensing lens to increase the illumination intensity, controls the width of the light beam in a reasonable range, and well balances the convenience of installation and the deviation of the position of the light beam caused by external vibration. The quality of the pictures collected by the linear array CCD depends on the uniformity of the linear light source in the one-dimensional direction to a great extent, meanwhile, the influence of vibration on the light beam in the working process is considered, the requirement on the uniformity from the center to the edge of the light beam is also high, and the quality of the collected pictures cannot be greatly influenced due to the small deviation of the position of the light source.
Referring to fig. 1 and 2, in the embodiment, an anti-interference cigarette appearance quality online detection method is provided, in which a first detection module 1 is installed on a side surface of a first transmission drum 3, a second detection module 2 is installed on a side surface of a second transmission drum 4, the first transmission drum 3 is adjacent to the second transmission drum 4, and since it is a cigarette opposite surface that the cigarette is adsorbed by transferring the cigarette between the two transmission drums, the detection modules are arranged on two side surfaces of the adjacent transmission drums to photograph the cigarette on the adjacent drums, so that a whole cigarette picture can be obtained, and a first photographing device and a second photographing device are arranged inside the first detection module 1 and are used for photographing a picture on one side surface of the same cigarette; a third photographing device and a fourth photographing device are arranged in the second detection module 2 and are used for photographing pictures on the other side face of the same cigarette, the cigarettes are adsorbed on the adsorption grooves of the conveying drum wheel, and the rotation of the conveying drum wheel drives the cigarettes on the adsorption grooves to move in sequence;
specifically, as shown in fig. 3 to 6, the method includes the following steps: the method comprises the following steps that a first photographing device shoots one or more pictures (shown in figure 3) on one side face of a cigarette at a first position 5 of a first transmission drum wheel 3, a second photographing device shoots one or more pictures (shown in figure 4) on one side face of the same cigarette at a second position 6 of the first transmission drum wheel 3, the pictures shot by the first photographing device and the second photographing device have a superposition area 11 (shown in figure 8), whether one side face of the cigarette is a real defect or not is comprehensively judged and identified through the two pictures, and if the side face of the cigarette is the real defect, a removing signal is sent to remove the defective cigarette at a removing opening; the third photographing device photographs one or more pictures (as shown in figure 5) on the other side face of the cigarette at a third position 7 of the second conveying drum wheel 4, the fourth photographing device photographs one or more pictures (as shown in figure 6) on the other side face of the cigarette at a fourth position 8 of the second conveying drum wheel 4, the pictures photographed by the first photographing device and the second photographing device have a coincidence area 11, the two pictures are comprehensively judged and recognized to determine whether the other side face of the cigarette is a real defect, and if the other side face of the cigarette is a defect, a rejecting signal is sent to reject the defective cigarette at a rejecting opening. The detection method can not only identify the interference of spray and sundries, but also effectively remove defective cigarettes.
Preferably, in order to improve the shooting efficiency, the first shooting device and the second shooting device shoot the two cigarettes at the first position 5 and the second position 6 at the same time, the third shooting device and the fourth shooting device shoot the two cigarettes at the third position 7 and the fourth position 8 at the same time (as shown in fig. 1), and the photos of the two cigarettes can be shot at one time.
In order to blow away the droplets and the impurities, as another embodiment, referring to fig. 7, while taking a picture of a cigarette, external compressed air is introduced into the detection cavity to form positive pressure in the cavity, so that dust and smoke outside cannot enter the detection cavity; compressed air blows out through the gas outlet, blows away cigarette foam, debris on the device surface of shooing, reduces the interference to do benefit to the heat dissipation.
In order to realize better detection of cigarette defects and effectively identify interference, an included angle between the picture acquisition directions of the first photographing device and the second photographing device is less than 75 degrees; and the included angle between the image acquisition directions of the third photographing device and the fourth photographing device is less than 75 degrees. Furthermore, an included angle between the picture collecting directions of the first photographing device and the second photographing device is 3-60 degrees; the included angle between the image collecting directions of the third photographing device and the fourth photographing device is 3-60 degrees. Furthermore, the included angle between the picture collecting directions of the first photographing device and the second photographing device is 3-18 degrees; and an included angle between the image acquisition directions of the third photographing device and the fourth photographing device is 3-18 degrees. The included angle between the picture collecting directions of the first photographing device and the second photographing device is 22-70 degrees; the included angle between the image acquisition directions of the third photographing device and the fourth photographing device is 22-70 degrees.
The two pictures shot by the first shooting device and the second shooting device have a coincidence area 11 of more than 80 percent; the two pictures shot by the third shooting device and the fourth shooting device have the overlapping area 11 of more than 80 percent. Further, two pictures shot by the first shooting device and the second shooting device have a superposition area 11 of more than 90%; the two pictures shot by the third shooting device and the fourth shooting device have the overlapping area 11 of more than 90 percent. Furthermore, the two pictures shot by the first shooting device and the second shooting device have the superposition area 11 of more than 95%; the two pictures shot by the third shooting device and the fourth shooting device have the overlapping area 11 of more than 95%.
In the invention, by limiting the included angle between the picture collecting directions, not only can sundries and cigarette foam be identified by comparing the cigarette pictures within the range of the overlapping area 11 of the two pictures, but also the following technical effects are achieved: the installation space on the cigarette making machine set mouth connecting machine is very limited, and the camera with a small angle is convenient to install; can also obtain enough full cigarette pictures so as to be convenient for removing defective cigarettes.
Referring to fig. 9, the on-line detection device of the embodiment can effectively detect one or all of filter tip white leakage, tipping paper doubling, filter tip bubble wrinkle, filter tip foam, cigarette rod tooth staggering, tipping paper length, cigarette rod puncture, cigarette rod spot (foam clipping), cigarette rod stain or cigarette length.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a can anti-interference a cigarette appearance quality on-line measuring device, includes first detection module, second detection module, first transmission drum and second transmission drum, its characterized in that: the first conveying drum wheel is adjacent to the second conveying drum wheel, the first detection module is arranged on the side face of the first conveying drum wheel and used for shooting two or more pictures of one side face of the same cigarette at different positions, and the two or more pictures have overlapping areas; the second detection module is arranged on the side surface of the second conveying drum wheel and is used for shooting two or more pictures of the other side surface of the same cigarette at different positions, and the two or more pictures have overlapped areas; the detection device further comprises an air blowing device, the air blowing device comprises an air outlet and a ventilation pipeline, and the ventilation pipeline is connected to the cavity for installing the detection module.
2. The anti-interference cigarette appearance quality online detection device according to claim 1, characterized in that: the first detection module comprises a light source for irradiating cigarettes, a first photographing device and a second photographing device for photographing the cigarettes, and the first photographing device and the second photographing device are arranged in a housing; the second detection module comprises a light source for irradiating the cigarettes, a third photographing device for photographing the cigarettes and a fourth photographing device, and the third photographing device and the fourth photographing device are arranged in a housing; the first photographing device and the second photographing device respectively photograph one side surface of the same cigarette at different positions of the first conveying drum wheel; the third photographing device and the fourth photographing device respectively photograph the other side face of the same cigarette at different positions of the second conveying drum wheel;
or the first detection module and the second detection module respectively comprise a light source for irradiating the cigarettes and a photographing device for photographing the cigarettes; the photographing device of the first detection module photographs one side surface of the same cigarette more than twice at different positions of the first conveying drum wheel; the photographing device of the second detection module photographs the other side face of the same cigarette more than twice at different positions of the second transmission drum wheel.
3. The anti-interference cigarette appearance quality online detection device according to claim 1, characterized in that: the included angle between the picture collecting directions of the same side face of the same cigarette is less than 75 degrees; two pictures shot from the same side of the same cigarette have more than 80% of overlapping area.
4. The anti-interference cigarette appearance quality online detection device according to claim 1, characterized in that: the photographing device is a linear array CCD camera or an area array CCD camera.
5. The anti-interference cigarette appearance quality online detection device according to claim 4, characterized in that: two LED light sources are arranged around the camera.
6. An anti-interference cigarette appearance quality online detection method comprises the steps that a first detection module is installed on the side face of a first conveying drum wheel, a second detection module is installed on the side face of a second conveying drum wheel, the first conveying drum wheel is adjacent to the second conveying drum wheel, and a first photographing device and a second photographing device are arranged inside the first detection module and used for photographing a picture of one side face of the same cigarette; a third photographing device and a fourth photographing device are arranged in the second detection module and are used for photographing pictures of the other side face of the same cigarette;
the method is characterized by comprising the following steps: the first photographing device photographs one or more pictures of one side face of a cigarette at a first position of the first conveying drum wheel, the second photographing device photographs one or more pictures of one side face of the same cigarette at a second position of the first conveying drum wheel, and the pictures photographed by the first photographing device and the second photographing device have a superposition area; the third device of shooing is in the picture of another side of cigarette or more than one is shot to the third position of second conveying drum, the fourth device of shooing is in the picture of another side of cigarette or more than one is shot to the fourth position of second conveying drum, first device of shooing with the picture that the second device of shooing was shot has coincidence area.
7. The on-line detection method for the cigarette appearance quality capable of resisting interference according to claim 6 is characterized in that: the first device of shooing with the second device of shooing is shot simultaneously two cigarettes that are in on first position and second position simultaneously, the third device of shooing with the fourth device of shooing is shot simultaneously two cigarettes that are in on third position and fourth position simultaneously, once only can shoot the photo of two cigarettes.
8. The on-line detection method for the cigarette appearance quality capable of resisting interference according to claim 6 is characterized in that: an included angle between the picture collecting directions of the first photographing device and the second photographing device is less than 75 degrees; an included angle between the image acquisition directions of the third photographing device and the fourth photographing device is less than 75 degrees;
the two pictures shot by the first shooting device and the second shooting device have more than 80% of overlapping area; the two pictures shot by the third shooting device and the fourth shooting device have the coincidence area of more than 80%.
9. The on-line detection method for the cigarette appearance quality capable of resisting interference according to claim 6 is characterized in that: when a cigarette photo is taken, external compressed air is introduced into the detection cavity, positive pressure is formed in the cavity, and external dust and smoke can not enter the detection cavity; compressed air blows out through the gas outlet, blows away cigarette foam, debris on the device surface of shooing, reduces the interference to do benefit to the heat dissipation.
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