CN111137645A - Detection system and detection method for paper cover - Google Patents

Abstract

Translated fromChinese

本发明公开了一种纸盖的检测系统及检测方法，包括机架，该机架上沿检测线方向依次设有前端输送组件、中部输送组件和后端输送组件，所述前端输送组件和中部输送组件上分别设有检测纸盖顶面和底面的第一检测机构和第二检测机构，所述前端输送组件和后端输送组件的侧边上分别设有废品收集口，所述前端输送组件和后端输送组件上位于废品收集口的对侧分别设有回收机构。本发明的检测系统能识别纸盖正反两面的黑点、异色点、浅色污渍、异物、蚊虫、破损，能识别通气口不良、吸管切口不良、毛边、logo擦伤等缺陷，检测出这些不良品后进行剔除，检测精准度高，检测效率高，检测速度最高可达180个/分钟，节约了人工成本的投入。

The invention discloses a detection system and a detection method for paper covers, comprising a frame, on which a front-end conveying assembly, a middle conveying assembly and a rear-end conveying assembly are arranged in sequence along the direction of a detection line, and the front conveying assembly and the middle conveying assembly are arranged in sequence. A first detection mechanism and a second detection mechanism for detecting the top surface and bottom surface of the paper cover are respectively provided on the conveying assembly, and waste collection ports are respectively provided on the sides of the front-end conveying assembly and the rear-end conveying assembly, and the front-end conveying assembly Recycling mechanisms are respectively provided on the opposite sides of the waste collection port and the rear-end conveying assembly. The detection system of the invention can identify black spots, different-colored spots, light-colored stains, foreign objects, mosquitoes, and damage on both sides of the paper cover, and can identify defects such as poor ventilation openings, poor straw incisions, burrs, logo scratches, etc. These defective products are then eliminated, with high detection accuracy and high detection efficiency, and the detection speed can reach up to 180 pieces per minute, saving labor costs.

Description

Detection system and detection method for paper cover

Technical Field

The invention relates to the field of paper cover detection, in particular to a paper cover detection system and a paper cover detection method.

Background

European and American high-end disposable food packages are forbidden to be molded, a plastic cover is required to be replaced by a paper cover, and the paper cover can generate partial defective products in the forming process and needs to be detected and rejected. At present, manual detection is mostly adopted, the detection efficiency is low, the long-time observation is easy to be tired, unqualified products are missed to be detected, great loss is caused to enterprises, and the labor cost is high, so that a device for automatically detecting the paper cover is necessary to be provided.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a detection system and a detection method for a paper cover, which not only save the investment of labor cost, but also have high detection efficiency and good detection effect.

In order to achieve the purpose, the invention adopts the technical scheme that:

a detection system of a paper cover comprises a detector shell and a frame arranged in the detector shell, wherein the top of the detector shell is provided with a detection display screen and an alarm, a front end conveying assembly, a middle conveying assembly and a rear end conveying assembly (a common conveyor belt) are sequentially arranged on the machine frame along the detection line direction, the side wall of the detector shell is provided with a detection inlet and a detection outlet corresponding to the front end conveying assembly and the rear end conveying assembly respectively, the side wall of the detector shell is also provided with an inspection window, the front end conveying assembly and the middle conveying assembly are respectively provided with a first detection mechanism and a second detection mechanism for detecting the top surface and the bottom surface of the paper cover, the side edges of the front end conveying component and the rear end conveying component are respectively provided with a first waste product collecting port and a second waste product collecting port, and the front end conveying assembly and the rear end conveying assembly are respectively provided with a recovery mechanism at the opposite sides of the first waste product collecting port and the second waste product collecting port.

The paper cover is conveyed from the edge trimmer to a detection system through a conveying line, a first detection mechanism on a front end conveying assembly shoots the top surface of the paper cover, a software detection system and a sensor trigger an acquisition image to judge whether the front surface of the paper cover is qualified or not, the software detection system transmits analysis data to a photoelectric eye, a unqualified top surface product is rejected by a recovery mechanism on the front end conveying assembly and is discharged from a first waste product collecting port, a qualified top surface product enters a middle conveying assembly, a second detection mechanism on the middle conveying assembly shoots the bottom surface of the paper cover, the software detection system and the sensor trigger the acquisition image to judge whether the bottom surface of the paper cover is qualified or not, the software detection system transmits the analysis data to the photoelectric eye, and the unqualified products on the bottom surface are rejected by the recovery mechanism on the rear-end conveying line component when passing through the rear-end conveying line component, and are discharged from the second waste collecting port, and the qualified products enter the next link.

An electrical control box is arranged below the rack and comprises various electrical components to guarantee electrical operation, an industrial personal computer installation component is used for installing the industrial personal computer, and operation, debugging and detection software and detection effects are checked.

The detection system can identify black spots, abnormal color spots, light color stains, foreign matters, mosquitoes and damages on the front surface and the back surface of the paper cover, can identify defects such as bad air vents, bad cuts of the suction pipe, rough edges, rogo scratches and the like, eliminates the defective products after detecting the defects, and has high detection precision and detection efficiency, the highest detection speed can reach 180 pieces/minute, and the investment of labor cost is saved.

Preferably, the first detection mechanism comprises an industrial camera and an annular surface light source mounting rack, the mounting plate is connected to the mounting plate, a lens of the industrial camera faces the surface light source mounting rack, a surface light source is arranged on one side, away from the industrial camera, of the surface light source mounting rack, and the first detection mechanism and the second detection mechanism are identical in structure;

the front-end conveying assembly is a transparent conveying belt, the industrial camera and the surface light source of the first detection mechanism are positioned above the front-end conveying assembly, the lens of the industrial camera of the first detection mechanism faces the top of the front-end conveying assembly, and a backlight source corresponding to the surface light source of the first detection mechanism is arranged in the front-end conveying assembly;

the industrial camera and the surface light source of the second detection mechanism are positioned below the middle conveying assembly, the lens of the industrial camera of the second detection mechanism faces the bottom of the middle conveying assembly, a through hole is formed in the middle conveying assembly corresponding to the surface light source of the second detection mechanism, and a light source corresponding to the surface light source of the second detection mechanism is arranged at the inner top of the detector shell.

The top surface and the bottom surface of the paper cover are detected by two detection mechanisms respectively arranged above and below the detection line, when the top surface of the paper cover is detected, a transparent conveying belt is adopted, backlight is arranged on the inner side of the conveying belt through a backlight source, an annular surface light source is arranged at the top of the paper cover, and 1 industrial camera is matched with a common industrial lens to detect quality data such as front damage, different color points, stains, foreign matters, mosquitoes, burrs and the like of the paper cover. When the bottom surface of the paper cover is detected, a second detection mechanism which is inverted relative to the first detection mechanism is adopted, and the principle of the second detection mechanism is the same as that of the first detection mechanism. The invention has high detection efficiency and high detection precision on the surface defects of the paper cover.

Preferably, industry camera and surface light source mounting bracket respectively through first connecting block and second connecting block with mounting panel sliding connection, the slip direction of first connecting block and second connecting block is the same with the length direction of mounting panel, and accurate shooting distance is found to adjustable industry camera and surface light source's upper and lower position.

Preferably, the industrial camera is hinged to the first connecting block through a first connecting rod, the surface light source mounting frame is hinged to the second connecting block through a second connecting rod, the swinging plane of the first connecting rod relative to the first connecting block and the swinging plane of the second connecting rod relative to the second connecting block are the same vertical plane, the industrial camera and the surface light source can swing on the vertical plane perpendicular to the direction of the detection line, the position of the industrial camera and the position of the surface light source can be finely adjusted, and the shooting angle is more accurate.

Preferably, the industrial camera is rotatably connected with the first connecting rod, and a rotation plane of the industrial camera relative to the first connecting rod is perpendicular to a swing plane of the first connecting rod relative to the first connecting block; the surface light source mounting bracket with second connecting rod rotatable coupling, the rotation plane of the relative second connecting rod of surface light source mounting bracket is perpendicular with the swing plane of the relative second connecting block of second connecting rod, and industry camera and surface light source can rotate on the vertical face along detection line direction, can finely tune the position of industry camera and surface light source for it is more accurate to shoot the angle.

Preferably, the middle conveying assembly comprises two groups of O-shaped conveying assemblies and a bottom plate which is connected with the output end of the front-end conveying assembly and the input end of the rear-end conveying assembly, and the through hole is formed in the bottom plate; the O-shaped transmission assembly comprises a second speed reducing motor, an O-shaped transmission driving wheel and an O-shaped transmission driven wheel, the O-shaped transmission driving wheel and the O-shaped transmission driven wheel are respectively located at the output end of the front end transmission assembly and the input end of the rear end transmission assembly, the O-shaped transmission driving wheel is connected with an output shaft of the second speed reducing motor, O-shaped belts are wound on the O-shaped transmission driving wheel and the O-shaped transmission driven wheel, a channel for a paper supply cover to pass through is formed between the two groups of O-shaped belts, the through hole is located in the middle of the channel, and when the paper cover passes through the channel, the two groups of.

Advance through two sets of O type area centre gripping paper covers, be located the industrial camera on the second detection mechanism of bottom plate below, shoot the bottom surface of paper cover through the through-hole on the bottom plate, detect the defect of paper cover bottom surface, middle part conveying assembly connects into complete detection line with front end conveying assembly and rear end conveying assembly, through holding paper cover through middle part conveying assembly, the condition of tumbling appears in the paper cover because of conveying unit's change when having avoided the paper cover transmission, guarantee the stability of paper cover when transmitting on the detection line.

Preferably, the top of bottom plate is connected with the roof through the support column, second buncher establishes the top of roof, the O type transmission from the driving wheel pass through the regulating spindle with the roof is connected, and O type transmission action wheel and O type transmission are in unsettled state from the driving wheel for O type transmission action wheel, O type transmission on the middle part conveyor components form a whole from driving wheel, bottom plate, roof and second buncher, and easy to assemble and dismantlement have avoided O type transmission action wheel and O type transmission to install the loaded down with trivial details on front end conveyor components and rear end conveyor components from the driving wheel.

Preferably, the O-shaped conveying assembly further comprises an O-shaped conveying tensioning wheel for adjusting the tensioning force of the O-shaped belt, the O-shaped conveying tensioning wheel is connected with the top plate through an adjusting shaft, the O-shaped conveying tensioning wheel is convenient to adjust the using tension of the O-shaped belt, and the requirement for conveying paper covers of different sizes can be met.

Preferably, the top plate is provided with elongated adjusting holes corresponding to the adjusting shafts, the elongated adjusting holes are used for the adjusting shafts to penetrate through, a fixing block for fixing the adjusting shafts is arranged at the top of the top plate, the length direction of the adjusting holes for the adjusting shafts connected with the O-shaped transmission tension wheel to penetrate through is the same as the transmission direction of the paper cover, the length direction of the adjusting holes for the adjusting shafts connected with the O-shaped transmission tension wheel to penetrate through is perpendicular to the transmission direction of the paper cover, and the adjusting holes are arranged to facilitate adjustment of the use positions of the O-shaped transmission tension wheel and the O-shaped transmission tension wheel.

Preferably, the width of the two ends of the channel formed by the two groups of O-shaped belts is larger than the width of the middle part of the channel, so that the flow guide effect is realized on the paper cover, and the transmission of the paper cover is facilitated.

Preferably, the top of the bottom plate is provided with parallel limiting plates on two opposite sides of the through hole, the distance between the two limiting plates is larger than the maximum outer diameter of the paper cover, and the two limiting plates form a limiting channel matched with a channel formed by the two groups of O-shaped belts, so that the transmission path of the paper cover is not deviated.

Preferably, the bottom of bottom plate corresponds two the limiting plate is equipped with the baffle respectively, two the interval of baffle is less than the biggest external diameter of paper lid, and the in-process of paper lid transmission on middle part conveyor components, the both sides limit of paper lid is taken on two baffles, can effectually prevent that the paper lid from droing from two sets of O type bands, and the contact width of paper lid and baffle only has several silks, and the influence that frictional force between reducible paper lid and baffle caused to the transmission.

Preferably, this detecting system of paper lid still includes a gear motor, a gear motor's output shaft has the transmission wheelset, this transmission wheelset respectively through the drive belt with the drive roller on front end conveyor components and the rear end conveyor components is connected, the drive roller on the front end conveyor components is located front end conveyor components's output, the drive roller on the rear end conveyor components is located rear end conveyor components's input, drives front end conveyor components and rear end conveyor components's action simultaneously through a gear motor, and it is more convenient to adjust, and simultaneously, the drive point is located front end conveyor components and rear end conveyor components's department of meeting for the overall structure of system is compacter. The rear end conveying assembly is provided with an adjusting wheel for adjusting the tension degree of the transmission belt, and the adjusting wheel is slidably arranged on an adjusting plate with a waist hole.

Preferably, retrieve the mechanism and include the air cock of being connected with compressed air source, the gas outlet orientation of air cock is located its offside waste product collection mouth, through air cock blowout compressed gas, can be convenient with unqualified paper lid blow in the waste product collection mouth that corresponds and collect.

Preferably, photoelectric eyes are arranged on the first detection mechanism, the second detection mechanism and the air nozzles through the optical fiber supports respectively, the corresponding positions of the paper covers are detected through the photoelectric eyes, and then the first detection mechanism, the second detection mechanism or the air nozzles are started to work.

Preferably, one side of rear end conveyor components is equipped with the finished product temporary storage mouth, rear end conveyor components is last to be located the offside of finished product temporary storage mouth is equipped with retrieve the mechanism, when the collection device that is located rear end conveyor components's output stops to collect and detects qualified paper lid, the accessible finished product temporary storage mouth carries out interim collection to detecting qualified paper lid.

Preferably, the top of the input end of the front end conveying assembly is provided with a pair of limiting rods which are parallel to each other, the two limiting rods form an adjusting channel for adjusting the conveying position of the paper cover, the width of the inlet end of the adjusting channel formed by the two limiting rods is larger than the width of the middle of the adjusting channel, and the two limiting rods can adjust the position of the paper cover conveyed by the adjusting channel, so that the paper cover is kept on a set detection route.

The invention also provides a detection method of the detection system applying the paper cover, and the technical scheme is as follows:

a detection method of a paper cover comprises the following steps:

the front end conveying assembly, the middle conveying assembly and the rear end conveying assembly form a detection line for transmitting the paper cover to be detected;

the first detection mechanism on the front-end conveying assembly and the second detection mechanism on the middle conveying assembly respectively collect images of the top surface and the bottom surface of the paper cover, and the software detection system processes and analyzes the collected images;

qualified products are transmitted to the next procedure by the rear-end conveying assembly, and the top surface unqualified products and the bottom surface unqualified products are respectively rejected to the first waste product collecting port and the second waste product collecting port through the recovery mechanism for collection.

Preferably, the step of acquiring and analyzing the images of the top and bottom surfaces of the paper cover specifically comprises the steps of:

the industrial camera collects images of the paper cover on the detection line in real time;

preprocessing and analyzing the acquired image, and improving the contrast of the image to increase the difference between the background and the foreground;

performing threshold segmentation on the preprocessed image, finding an area where the paper cover is located, and extracting the outline of the paper cover;

calculating the outline defect of the paper cover according to the points on the outline, and judging whether the outline of the paper cover is qualified;

fitting the circle center of the paper cover, calculating the distance from a point on the outline of the paper cover to the circle center, and judging whether the paper cover has burrs or not;

setting a special color point and a yellow spot detection area by zooming the outer contour of the paper cover;

detecting the abnormal color points and the yellow spot flaws on the surface of the paper cover by adopting a sliding window algorithm in the set abnormal color point and yellow spot detection area;

setting crack and broken hole detection areas by scaling the outer contour of the paper cover;

carrying out crack and hole detection on the set crack and hole detection areas by adopting a filtering algorithm;

detecting the condition of the suction pipe opening of the paper cover by adopting a template matching algorithm;

searching the outline of a bright area inside the paper cover, and judging whether the suction pipe opening exists or not according to the outline characteristics;

judging whether the air holes exist or not by adopting a curvature radius algorithm;

transmitting the detection result to a corresponding recovery mechanism, and if the surface of the paper cover has defects, operating the recovery mechanism; if the surface of the paper cover is normal, the recovery mechanism does not work.

The invention has the beneficial effects that:

1. the detection system can identify black spots, abnormal color spots, light color stains, foreign matters, mosquitoes and damages on the front surface and the back surface of the paper cover, can identify defects such as bad air vents, bad cuts of the suction pipe, rough edges, rogo scratches and the like, eliminates the defective products after detecting the defects, and has high detection precision and detection efficiency, the highest detection speed can reach 180 pieces/minute, and the investment of labor cost is saved.

2. When the top surface of the paper cover is detected, the transparent conveying belt is adopted, backlight is arranged on the inner side of the conveying belt through a backlight source, an annular surface light source is arranged at the top of the paper cover, and 1 industrial camera is adopted to be matched with a common industrial lens to detect quality data such as damage, different color points, stains, foreign matters, mosquitoes, burrs and the like on the front surface of the paper cover. When the bottom surface of the paper cover is detected, a second detection mechanism which is inverted relative to the first detection mechanism is adopted, and the principle of the second detection mechanism is the same as that of the first detection mechanism.

3. The up-and-down position of the industrial camera and the surface light source can be adjusted to find out the accurate shooting distance.

4. The position of the industrial camera and the surface light source can be finely adjusted, so that the shooting angle is more accurate.

5. Through covering the centre gripping with paper and passing through middle part conveyor components, the condition that the paper lid tumbles appears because of conveyor unit's change when having avoided the paper to cover the transmission, guarantees the stability of paper lid when the transmission on the check line.

6. The O-shaped transmission driving wheel and the O-shaped transmission driven wheel are in a suspended state, so that the O-shaped transmission driving wheel, the O-shaped transmission driven wheel, the bottom plate, the top plate and the second speed regulating motor on the middle conveying assembly form a whole, the installation and the disassembly are convenient, and the trouble that the O-shaped transmission driving wheel and the O-shaped transmission driven wheel are installed on the front-end conveying assembly and the rear-end conveying assembly is avoided.

7. The O-shaped transmission tensioning wheel is convenient to adjust the use tension of the O-shaped belt, and the requirements for the transmission of paper covers with different sizes can be met.

8. The setting of regulation hole is convenient to the regulation of each O type transmission from the use position of driving wheel and O type transmission take-up pulley.

9. The width of the two ends of the channel formed by the two groups of O-shaped belts is larger than the width of the middle part of the channel, so that the paper cover is guided, and the paper cover is conveniently conveyed.

10. The two limit plates form limit channels matched with the channels formed by the two groups of O-shaped belts, so that the transmission path of the paper cover is not deviated.

11. The paper lid is in the in-process of transmission on middle part conveyor components, and the both sides limit of paper lid is taken on two baffles, can effectually prevent that the paper lid from droing from two sets of O type bands, and the paper lid only has several silks with the contact width of baffle, and the influence that frictional force between reducible paper lid and baffle caused the transmission.

12. The front end conveying assembly and the rear end conveying assembly are driven to move simultaneously through the speed reducing motor, the adjustment is more convenient, and meanwhile, the driving point is located at the connecting position of the front end conveying assembly and the rear end conveying assembly, so that the whole structure of the system is more compact.

13. Compressed gas is sprayed out through the air nozzle, so that unqualified paper covers can be conveniently blown into the corresponding waste product collecting port for collection.

14. The corresponding position of the paper cover is detected through the photoelectric eye, and then the first detection mechanism, the second detection mechanism or each air nozzle is started to work.

15. When the collection device that is located the output of rear end conveyor components stops collecting and detects qualified paper lid, accessible finished product temporary storage mouth carries out interim collection to detecting qualified paper lid for the detection process can be carried out continuously, need not to count and waits.

16. The arrangement of the two limiting rods can adjust the position of the transmitted paper cover, so that the paper cover is kept on a set detection route.

Drawings

Fig. 1 is an external structural view of a detection system for a paper cover according to an embodiment of the present invention;

fig. 2 is a schematic view of an internal structure of a detection system for a paper cover according to an embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic view of an internal structure of a paper cover detection system according to an embodiment of the present invention;

FIG. 5 is an enlarged view at B in FIG. 4;

fig. 6 is a third schematic internal structural diagram of a paper cover detection system according to an embodiment of the present invention;

fig. 7 is a schematic view of the internal structure of the detection system of the paper cover according to the embodiment of the present invention;

FIG. 8 is an enlarged view at C of FIG. 7;

FIG. 9 is a schematic structural view of a central transport assembly according to an embodiment of the present invention;

FIG. 10 is a schematic view of the structure of FIG. 9 with the top plate removed;

fig. 11 is a bottom view of fig. 10.

Description of reference numerals:

1. a detector housing; 2. an inspection window; 3. detecting a display screen; 4. an alarm; 5. a detection outlet; 6. a first waste collection port; 7. a second waste collection port; 8. a front end transport assembly; 9. a rear end transport assembly; 10. a first reduction motor; 11. a second reduction motor; 12. a finished product temporary storage port; 13. a top plate; 14. a first detection mechanism; 1401. mounting a plate; 1402. a first connection block; 1403. a first connecting rod; 1404. an industrial camera; 1405. a second connecting block; 1406. a second connecting rod; 1407. a surface light source mounting bracket; 1408. a surface light source; 15. a photoelectric eye; 16. a limiting rod; 17. an air tap; 18. a middle transport assembly; 1801. a base plate; 1802. a support pillar; 1803. an optical fiber holder; 1804. an O-shaped transmission driving wheel; 1805. an O-shaped belt; 1806. an O-shaped transmission tension wheel; 1807. an O-shaped transmission driven wheel; 1808. an adjustment shaft; 1809. a limiting plate; 1810. an adjustment hole; 19. a backlight source; 20. a transmission belt; 21. a second detection mechanism; 22. a transmission wheel set; 23. an adjustment wheel; 24. an adjusting plate; 25. and (7) a paper cover.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example (b):

as shown in fig. 1-6, a paper cover detection system comprises a detector housing 1 and a frame arranged in the detector housing 1, wherein a detection display screen 3 and an alarm 4 are arranged on the top of the detector housing 1, a front end conveying assembly 8, a middle conveying assembly and a rear end conveying assembly 9 (a common conveyor belt) are sequentially arranged on the frame along a detection line direction, a detection inlet and a detection outlet 5 are respectively arranged on the side wall of the detector housing 1 corresponding to the front end conveying assembly 8 and the rear end conveying assembly 9, an inspection window 2 is also arranged on the side wall of the detector housing 1, a first detection mechanism 14 and a second detection mechanism 21 for detecting the top surface and the bottom surface of a paper cover 25 are respectively arranged on the front end conveying assembly 8 and the middle conveying assembly, a first waste product collection port 6 and a second waste product collection port 7 are respectively arranged on the side edges of the front end conveying assembly 8 and the rear end conveying assembly 9, and the front end conveying assembly 8 and the rear end conveying assembly 9 are respectively provided with a recovery mechanism at the opposite side of the first waste collecting port 6 and the second waste collecting port 7.

Thepaper cover 25 is conveyed from the edge trimmer to a detection system through a conveying line, afirst detection mechanism 14 on a frontend conveying assembly 8 shoots the top surface of thepaper cover 25, a software detection system and a sensor trigger and acquire images to judge whether the front surface of thepaper cover 25 is qualified or not, the software detection system transmits analysis data to aphotoelectric eye 15, a unqualified top surface product is rejected by a recovery mechanism on the frontend conveying assembly 8 and is discharged from a firstwaste collection port 6, a qualified top surface product enters a middle conveying assembly, asecond detection mechanism 21 on the middle conveying assembly shoots the bottom surface of thepaper cover 25, the software detection system and the sensor trigger and acquire images to judge whether the bottom surface of thepaper cover 25 is qualified or not, the software detection system transmits the analysis data to thephotoelectric eye 15, the unqualified bottom surface product is rejected by the recovery mechanism on a rear end conveying line assembly when passing through the rear end conveying line assembly and is discharged from a, and (5) the qualified product enters the next link.

An electrical control box is arranged below the rack and comprises various electrical components to guarantee electrical operation, an industrial personal computer installation component is used for installing the industrial personal computer, and operation, debugging and detection software and detection effects are checked.

The detection system can identify black spots, abnormal color spots, light color stains, foreign matters, mosquitoes and damages on the front surface and the back surface of thepaper cover 25, can identify defects such as bad air vents, bad suction pipe cuts, rough edges, rogo scratches and the like, eliminates the defective products after detecting the defects, and has high detection precision, high detection efficiency and detection speed of up to 180/min, and saves the investment of labor cost.

In one embodiment, as shown in fig. 3, thefirst detection mechanism 14 comprises anindustrial camera 1404 and an annular surface lightsource mounting rack 1407, wherein the mountingplate 1401 is connected to the mountingplate 1401, the lens of theindustrial camera 1404 faces the surface lightsource mounting rack 1407, thesurface light source 1408 is arranged on the side of the surface lightsource mounting rack 1407 far away from theindustrial camera 1404, and thefirst detection mechanism 14 and thesecond detection mechanism 21 have the same structure;

the frontend conveying assembly 8 is a transparent conveyor belt, theindustrial camera 1404 and thearea light source 1408 of thefirst detection mechanism 14 are positioned above the frontend conveying assembly 8, the lens of theindustrial camera 1404 of thefirst detection mechanism 14 faces the top of the frontend conveying assembly 8, and abacklight 19 corresponding to thearea light source 1408 of thefirst detection mechanism 14 is arranged in the frontend conveying assembly 8;

theindustrial camera 1404 and thesurface light source 1408 of thesecond detection mechanism 21 are located below the middle conveying assembly, the lens of theindustrial camera 1404 of thesecond detection mechanism 21 faces the bottom of the middle conveying assembly, a through hole is formed in the middle conveying assembly corresponding to thesurface light source 1408 of thesecond detection mechanism 21, and a light source corresponding to thesurface light source 1408 of thesecond detection mechanism 21 is arranged at the inner top of the detector housing 1.

The top surface and the bottom surface of thepaper cover 25 are detected by two detection mechanisms respectively arranged above and below the detection line, when the top surface of thepaper cover 25 is detected, a transparent conveyor belt is adopted, backlight is applied to the inner side of the conveyor belt through abacklight source 19, an annularsurface light source 1408 is arranged at the top of thepaper cover 25, and 1industrial camera 1404 is adopted to be matched with a common industrial lens to detect quality data such as damage, heterochrosis, stains, foreign matters, mosquitoes, burrs and the like on the front surface of thepaper cover 25. When the bottom surface of thepaper cover 25 is detected, thesecond detection mechanism 21 is inverted with respect to thefirst detection mechanism 14, and the principle is the same as that of thefirst detection mechanism 14. The invention has high detection efficiency and high detection precision on the surface defects of thepaper cover 25, and the detection results are as follows:

serial number	Item of bad	Detection function	Detection rate
				1	Breakage of	The area of the broken hole is more than or equal to 2mm2Or the damage length is more than or equal to 3mm (the depth exceeds 1mm)	About 99.99%
2	Color point of different color	The area is more than or equal to 1mm2Gray difference > 60	About 99.99%
				3	Stain or soil	The area is more than or equal to 1mm2Gray difference > 60	About 99.99%
4	Foreign matter	The length of the foreign matter is more than 2mm, and the gray difference value is more than 60	About 99.99%
				5	Mosquito and insect	Flies, mosquitoes and the like	About 99.99%
6	Burrs	The length of the rough edge is more than 2mm, and the diameter of the rough edge is more than 1mm	About 99.99%

In one embodiment, as shown in fig. 3, theindustrial camera 1404 and the area lightsource mounting frame 1407 are slidably connected to the mountingplate 1401 through a first connectingblock 1402 and a second connectingblock 1405 respectively, the sliding direction of the first connectingblock 1402 and the second connectingblock 1405 is the same as the length direction of the mountingplate 1401, and the up-down position of theindustrial camera 1404 and thearea light source 1408 can be adjusted to find a precise shooting distance.

In one embodiment, as shown in fig. 3, theindustrial camera 1404 is hinged to the first connectingblock 1402 through a first connectingrod 1403, the surface lightsource mounting frame 1407 is hinged to the second connectingblock 1405 through a second connectingrod 1406, the swinging plane of the first connectingrod 1403 relative to the first connectingblock 1402 and the swinging plane of the second connectingrod 1406 relative to the second connectingblock 1405 are the same vertical plane, theindustrial camera 1404 and thesurface light source 1408 can swing on a vertical plane in a vertical detection line direction, and the positions of theindustrial camera 1404 and thesurface light source 1408 can be finely adjusted, so that the shooting angle is more accurate.

In one embodiment, as shown in fig. 3, theindustrial camera 1404 is rotatably connected to the first connectingrod 1403, and a rotation plane of theindustrial camera 1404 with respect to the first connectingrod 1403 is perpendicular to a swing plane of the first connectingrod 1403 with respect to the first connectingblock 1402; the surface lightsource mounting frame 1407 is rotatably connected with the second connectingrod 1406, the rotation plane of the surface lightsource mounting frame 1407 relative to the second connectingrod 1406 is perpendicular to the swing plane of the second connectingrod 1406 relative to the second connectingblock 1405, theindustrial camera 1404 and thesurface light source 1408 can rotate on the vertical plane along the detection line direction, the positions of theindustrial camera 1404 and thesurface light source 1408 can be finely adjusted, and the shooting angle is more accurate.

In one embodiment, as shown in fig. 5, the middle conveying assembly includes two groups of O-shaped transmission assemblies and abottom plate 1801 connecting an output end of the front conveyingassembly 8 and an input end of the rear conveyingassembly 9, and the through hole is formed in thebottom plate 1801; the O type transmission assembly comprises a secondspeed reducing motor 11, an O typetransmission driving wheel 1804 and an O type transmission drivenwheel 1807 which are respectively positioned at the output end of the frontend transmission assembly 8 and the input end of the rearend transmission assembly 9, the O typetransmission driving wheel 1804 and the output shaft of the secondspeed reducing motor 11, an O typetransmission driving wheel 1804 and an O type transmission drivenwheel 1807 are wound with anO type belt 1805, theO type belt 1805 forms a channel for thepaper cover 25 to pass through, the through hole is positioned in the middle of the channel, and when thepaper cover 25 passes through the channel, theO type belt 1805 abuts against two opposite sides of thepaper cover 25.

Through two sets ofO type area 1805 centre grippingpaper lid 25 and advancing, theindustrial camera 1404 on thesecond detection mechanism 21 that is locatedbottom plate 1801 below, shoot the bottom surface ofpaper lid 25 through the through-hole onbottom plate 1801, detect the defect ofpaper lid 25 bottom surface, middle part conveyor components connects frontend conveyor components 8 and rearend conveyor components 9 into complete detection line, through holdingpaper lid 25 through middle part conveyor components, the condition that leads topaper lid 25 to appear tipping because of conveyor units's change when having avoidedpaper lid 25 transmission, guarantee the stability ofpaper lid 25 when the transmission on the detection line.

In one embodiment, as shown in fig. 9, the top of thebottom plate 1801 is connected to atop plate 13 through asupport column 1802, the second adjustable speed motor is disposed on the top of thetop plate 13, the O-shaped transmission drivenwheel 1807 is connected to thetop plate 13 through a regulatingshaft 1808, and the O-shapedtransmission driving wheel 1804 and the O-shaped transmission drivenwheel 1807 are in a suspended state, so that the O-shapedtransmission driving wheel 1804, the O-shaped transmission drivenwheel 1807, thebottom plate 1801, thetop plate 13 and the second adjustable speed motor on the middle conveying assembly are integrated, which facilitates installation and disassembly, and avoids the complexity of installing the O-shapedtransmission driving wheel 1804 and the O-shaped transmission drivenwheel 1807 on the frontend conveying assembly 8 and the rearend conveying assembly 9.

In one embodiment, as shown in fig. 5, the O-type conveying assembly further includes an O-type conveying tensioner 1806 for adjusting the tension of the O-type belt 1805, the O-type conveying tensioner 1806 is connected to thetop plate 13 through an adjustingshaft 1808, and the O-type conveying tensioner 1806 is arranged to adjust the tension of the O-type belt 1805, so as to meet the requirements of conveying paper covers 25 with different sizes.

In one embodiment, as shown in fig. 9, thetop plate 13 is provided with elongated adjusting holes 1810 through which theadjusting shafts 1808 pass, corresponding to the adjustingshafts 1808, respectively, the top of thetop plate 13 is provided with a fixing block for fixing the adjustingshafts 1808, the length direction of the adjusting hole 1810 through which the adjustingshaft 1808 connected to the O-shaped transmission drivenwheel 1807 passes is the same as the conveying direction of thepaper cover 25, the length direction of the adjusting hole 1810 through which the adjustingshaft 1808 connected to the O-shapedtransmission tension wheel 1806 passes is perpendicular to the conveying direction of thepaper cover 25, and the adjusting holes 1810 are arranged to facilitate adjustment of the use positions of the O-shaped transmission drivenwheel 1807 and the O-shapedtransmission tension wheel 1806.

In one embodiment, as shown in fig. 5, the width of the two ends of the channel formed by the two sets of O-belts 1805 is greater than the width of the middle of the channel, so as to guide thepaper cover 25 and facilitate the transportation of thepaper cover 25.

In one embodiment, as shown in fig. 10, the top of thebottom plate 1801 is provided with two parallel limitingplates 1809 on two opposite sides of the through hole, respectively, a distance between the two limitingplates 1809 is greater than a maximum outer diameter of thepaper cover 25, and the two limitingplates 1809 form a limiting channel matched with a channel formed by two sets of the O-shapedbelts 1805, so as to ensure that a transmission path of thepaper cover 25 does not deviate.

In one embodiment, as shown in fig. 11, the bottom of thebottom plate 1801 is provided with two baffle plates corresponding to the two limitingplates 1809, a distance between the two baffle plates is smaller than a maximum outer diameter of thepaper cover 25, two side edges of thepaper cover 25 are lapped on the two baffle plates in a transmission process of thepaper cover 25 on themiddle conveying assembly 18, so that thepaper cover 25 can be effectively prevented from falling off from the two groups of O-shapedbelts 1805, a contact width between thepaper cover 25 and the baffle plates is only a few threads, and an influence on the transmission caused by a friction force between thepaper cover 25 and the baffle plates can be reduced.

In one embodiment, as shown in fig. 8, the detection system of thepaper cover 25 further includes a firstspeed reducing motor 10, an output shaft of the firstspeed reducing motor 10 is connected with a transmission wheel set 22, the transmission wheel set 22 is respectively connected with the driving rollers on the frontend conveying assembly 8 and the rearend conveying assembly 9 through atransmission belt 20, the driving roller on the frontend conveying assembly 8 is located at the output end of the frontend conveying assembly 8, the driving roller on the rearend conveying assembly 9 is located at the input end of the rearend conveying assembly 9, the frontend conveying assembly 8 and the rearend conveying assembly 9 are driven to move simultaneously through one speed reducing motor, the adjustment is more convenient, and meanwhile, a driving point is located at the joint of the frontend conveying assembly 8 and the rearend conveying assembly 9, so that the overall structure of the system is more compact. The rearend conveyor assembly 9 is provided with anadjustment wheel 23 for adjusting the tension of thebelt 20, theadjustment wheel 23 being slidably mounted on anadjustment plate 24 having a waist-hole.

In one embodiment, as shown in fig. 2, 4 and 6, the recycling mechanism comprises anair nozzle 17 connected with a compressed air source, an air outlet of theair nozzle 17 faces to the waste product collecting port on the opposite side, and the unqualified paper covers 25 can be conveniently blown into the corresponding waste product collecting port to be collected by ejecting the compressed air through theair nozzle 17.

In one embodiment, as shown in fig. 2, 4 and 6, aphotoelectric eye 15 is provided on each of the first detectingmechanism 14, the second detectingmechanism 21 and eachair nozzle 17 through theoptical fiber support 1803, and thephotoelectric eye 15 detects the corresponding position of thepaper cover 25, so as to activate the first detectingmechanism 14, the second detectingmechanism 21 or eachair nozzle 17.

In one embodiment, as shown in fig. 2, 4 and 6, a finished producttemporary storage 12 is provided on one side of the rearend conveying assembly 9, and the recovery mechanism is provided on the rearend conveying assembly 9 on the opposite side of the finished producttemporary storage 12, so that when the collecting device at the output end of the rearend conveying assembly 9 stops collecting the qualified paper covers 25, the qualified paper covers 25 can be temporarily collected through the finished producttemporary storage 12.

In one embodiment, as shown in fig. 2 and 4, a pair of parallel position-limitingrods 16 is disposed on the top of the input end of the frontend conveying assembly 8, the two position-limitingrods 16 form an adjusting channel for adjusting the conveying position of thepaper cover 25, the width of the inlet end of the adjusting channel formed by the two position-limitingrods 16 is greater than the width of the middle portion of the adjusting channel, and the two position-limitingrods 16 are arranged to adjust the position of the conveyedpaper cover 25, so that thepaper cover 25 is kept on the set detection route.

A detection method of a paper cover comprises the following steps:

the frontend conveying assembly 8, themiddle conveying assembly 18 and the rearend conveying assembly 9 form a detection line for transmitting thepaper cover 25 to be detected;

thefirst detection mechanism 14 on the frontend conveying assembly 8 and thesecond detection mechanism 21 on themiddle conveying assembly 18 respectively collect images of the top surface and the bottom surface of thepaper cover 25, and the software detection system processes and analyzes the collected images;

the qualified products are transmitted to the next procedure by the rearend conveying assembly 9, and the top surface unqualified products and the bottom surface unqualified products are respectively rejected to the first wasteproduct collecting port 6 and the second waste product collecting port 7 through the recovery mechanism for collection.

In one embodiment, the step of acquiring and analyzing the images of the top and bottom surfaces of thepaper cover 25 specifically comprises the following steps:

the industrial camera collects images of thepaper cover 25 on the detection line in real time;

preprocessing and analyzing the acquired image, and improving the contrast of the image to increase the difference between the background and the foreground;

performing threshold segmentation on the preprocessed image, finding an area where thepaper cover 25 is located, and extracting the outer contour of thepaper cover 25;

calculating the outline defect of thepaper cover 25 according to the points on the outline, and judging whether the outline of thepaper cover 25 is qualified;

fitting the circle center of thepaper cover 25, calculating the distance from a point on the outer contour of thepaper cover 25 to the circle center, and judging whether thepaper cover 25 has burrs;

by zooming the outer contour of thepaper cover 25, a special color point and a yellow spot detection area are set;

detecting the color spots and the yellow spot flaws on the surface of thepaper cover 25 by adopting a sliding window algorithm for the set color spot and yellow spot detection areas;

setting crack and hole detection areas by scaling the outer contour of thepaper cover 25;

carrying out crack and hole detection on the set crack and hole detection areas by adopting a filtering algorithm;

detecting the condition of the suction pipe opening of thepaper cover 25 by adopting a template matching algorithm;

searching the outline of the bright area inside thepaper cover 25, and judging whether the suction pipe opening exists or not according to the outline characteristics;

judging whether the air holes exist or not by adopting a curvature radius algorithm;

transmitting the detection result to a corresponding recovery mechanism, and if the surface of thepaper cover 25 has defects, the recovery mechanism works; if the surface of thepaper cover 25 is normal, the recovery mechanism does not operate.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (10)

Translated fromChinese

1.一种纸盖的检测系统，其特征在于，包括机架，该机架上沿检测线方向依次设有前端输送组件、中部输送组件和后端输送组件，所述前端输送组件和中部输送组件上分别设有检测纸盖顶面和底面的第一检测机构和第二检测机构，所述前端输送组件和后端输送组件的侧边上分别设有废品收集口。1. A detection system for a paper cover, characterized in that it comprises a frame on which a front-end conveying assembly, a middle conveying assembly and a rear-end conveying assembly are successively arranged along the direction of the inspection line, and the front-end conveying assembly and the middle conveying assembly are arranged in turn. The components are respectively provided with a first detection mechanism and a second detection mechanism for detecting the top surface and bottom surface of the paper cover, and waste collection ports are respectively provided on the side edges of the front-end conveying component and the rear-end conveying component.2.根据权利要求1所述的纸盖的检测系统，其特征在于，所述第一检测机构包括安装板，该安装板上设有工业相机和面光源，所述第一检测机构和第二检测机构的结构相同；所述前端输送组件为透明传送带，所述第一检测机构的工业相机的镜头朝向前端输送组件的顶部，所述前端输送组件的内部设有与所述第一检测机构的面光源对应的背光源；所述第二检测机构的工业相机的镜头朝向中部输送组件的底部，所述中部输送组件上对应第二检测机构的面光源设有通孔。2 . The detection system of the paper cover according to claim 1 , wherein the first detection mechanism comprises a mounting plate, the mounting plate is provided with an industrial camera and a surface light source, and the first detection mechanism and the second detection mechanism are provided with an industrial camera and a surface light source. The structure of the detection mechanism is the same; the front-end conveying assembly is a transparent conveyor belt, the lens of the industrial camera of the first detection mechanism faces the top of the front-end conveying assembly, and the interior of the front-end conveying assembly is provided with the first detection mechanism. The backlight corresponding to the surface light source; the lens of the industrial camera of the second detection mechanism faces the bottom of the middle conveying assembly, and the middle conveying assembly is provided with a through hole corresponding to the surface light source of the second detection mechanism.3.根据权利要求1或2所述的纸盖的检测系统，其特征在于，所述中部输送组件包括两组O型传输组件和连接所述前端输送组件的输出端和后端输送组件的输入端的底板，所述底板上设有所述通孔；所述O型传输组件包括第二减速电机、分别位于前端输送组件的输出端和后端输送组件的输入端的O型传输主动轮和O型传输从动轮，所述O型传输主动轮与所述第二减速电机的输出轴连接，所述O型传输主动轮和O型传输从动轮上绕设有O型带，两组所述O型带之间形成供纸盖通过的通道，所述通孔位于通道的中部，当纸盖穿过所述通道时，两组所述O型带分别与纸盖的相对两侧抵靠。3. The detection system of the paper cover according to claim 1 or 2, wherein the middle conveying assembly comprises two groups of O-shaped transmission assemblies and an output end connecting the front end conveying assembly and an input of the rear end conveying assembly The bottom plate is provided with the through hole on the bottom plate; the O-type transmission assembly includes a second reduction motor, an O-type transmission driving wheel and an O-type transmission driving wheel respectively located at the output end of the front-end conveying assembly and the input end of the rear-end conveying assembly. The transmission driven wheel, the O-type transmission driving wheel is connected with the output shaft of the second reduction motor, the O-type transmission driving wheel and the O-type transmission driven wheel are wound with an O-shaped belt, and two sets of the O-type transmission A passage for the paper cover to pass through is formed between the belts, and the through hole is located in the middle of the passage. When the paper cover passes through the passage, the two sets of O-belts abut against opposite sides of the paper cover respectively.4.根据权利要求3所述的纸盖的检测系统，其特征在于，所述底板的顶部位于所述通孔的相对两侧分别设有相互平行的限位板，两所述限位板的间距大于纸盖的最大外径。4 . The detection system of the paper cover according to claim 3 , wherein the top of the bottom plate is located on the opposite sides of the through hole, and mutually parallel limit plates are respectively provided, and the two limit plates are 4. 5 . The spacing is greater than the maximum outer diameter of the paper cover.5.根据权利要求4所述的纸盖的检测系统，其特征在于，所述底板的底部对应两所述限位板分别设有挡板，两所述挡板的间距小于纸盖的最大外径。5 . The detection system of the paper cover according to claim 4 , wherein the bottom of the bottom plate is respectively provided with baffle plates corresponding to the two limit plates, and the distance between the two baffle plates is smaller than the maximum outer diameter of the paper cover. 6 . path.6.根据权利要求5所述的纸盖的检测系统，其特征在于，还包括第一减速电机，所述第一减速电机的输出轴连接有传动轮组，该传动轮组分别通过传动带与所述前端输送组件和后端输送组件上的驱动辊连接，所述前端输送组件上的驱动辊位于前端输送组件的输出端，所述后端输送组件上的驱动辊位于后端输送组件的输入端。6 . The detection system for paper cover according to claim 5 , further comprising a first deceleration motor, the output shaft of the first deceleration motor is connected with a transmission wheel group, and the transmission wheel group is connected to the The front-end conveying assembly is connected to the driving roller on the rear-end conveying assembly, the driving roller on the front-end conveying assembly is located at the output end of the front-end conveying assembly, and the driving roller on the rear-end conveying assembly is located at the input end of the rear-end conveying assembly .7.根据权利要求6所述的纸盖的检测系统，其特征在于，所述前端输送组件和后端输送组件上位于废品收集口的对侧分别设有回收机构，所述回收机构包括与压缩气源连接的气嘴，所述气嘴的出气口朝向位于其对侧的废品收集口；该检测系统上对应所述第一检测机构、第二检测机构和各个气嘴分别通过光纤支架设有光电眼。7 . The paper cover detection system according to claim 6 , wherein the front-end conveying assembly and the rear-end conveying assembly are respectively provided with recycling mechanisms on the opposite sides of the waste collection port, and the recycling mechanisms include compression and compression mechanisms. 8 . The air nozzle connected to the air source, the air outlet of the air nozzle faces the waste collection port located on the opposite side; the detection system corresponding to the first detection mechanism, the second detection mechanism and each air nozzle is provided with an optical fiber support respectively. Photoelectric eye.8.根据权利要求7所述的纸盖的检测系统，其特征在于，所述前端输送组件的输入端的顶部设有一对相互平行的限位杆，两所述限位杆形成调整纸盖传输位置的调整通道，两所述限位杆形成的调整通道的入口端的宽度大于其中部的宽度。8 . The detection system of the paper cover according to claim 7 , wherein a pair of limit rods parallel to each other are provided at the top of the input end of the front-end conveying assembly, and the two limit rods form an adjustment of the transfer position of the paper cover. 9 . In the adjustment channel, the width of the inlet end of the adjustment channel formed by the two limit rods is greater than the width of the middle thereof.9.一种纸盖的检测方法，其特征在于，包括以下步骤：9. A detection method for a paper cover, characterized in that, comprising the following steps:前端输送组件、中部输送组件和后端输送组件组成检测线，传输待检测的纸盖；The front-end conveying assembly, the middle conveying assembly and the rear-end conveying assembly form a detection line, which transmits the paper cover to be inspected;前端输送组件上的第一检测机构和中部输送组件上的第二检测机构分别对纸盖的顶面和底面进行图像采集，软件检测系统对采集的图像进行处理分析；The first detection mechanism on the front-end conveying assembly and the second detection mechanism on the middle conveying assembly respectively collect images of the top and bottom surfaces of the paper cover, and the software detection system processes and analyzes the collected images;合格品由后端输送组件传输到下一工序，顶面不合格品和底面不合格品分别通过回收机构剔除至第一废品收集口和第二废品收集口收集。The qualified products are transferred to the next process by the rear-end conveying assembly, and the unqualified products on the top surface and the unqualified products on the bottom surface are respectively rejected by the recycling mechanism to the first waste collection port and the second waste collection port for collection.10.根据权利要求9所述的纸盖的检测方法，其特征在于，对纸盖的顶面和底面进行图像采集、分析的步骤具体包括以下步骤：10. The detection method of the paper cover according to claim 9, wherein the step of performing image acquisition and analysis on the top surface and the bottom surface of the paper cover specifically comprises the following steps:实时采集纸盖的图像；Real-time capture of the image of the paper cover;对采集到的图像进行预处理分析，提高图像的对比度，使得背景与前景差异增大；Perform preprocessing analysis on the collected images to improve the contrast of the images and increase the difference between the background and the foreground;对预处理后的图像进行阈值分割，找到纸盖所在区域，并提取纸盖的外轮廓；Perform threshold segmentation on the preprocessed image, find the area where the paper cover is located, and extract the outer contour of the paper cover;根据外轮廓上的点，计算纸盖的外轮廓缺陷，判定纸盖外形是否合格；According to the points on the outer contour, calculate the outer contour defects of the paper cover, and judge whether the shape of the paper cover is qualified;拟合纸盖的圆心，计算纸盖的外轮廓上的点到圆心的距离，判定纸盖是否有毛边；Fit the center of the paper cover, calculate the distance from the point on the outer contour of the paper cover to the center of the circle, and determine whether the paper cover has burrs;通过缩放纸盖的外轮廓，设置异色点、黄斑检测区域；By scaling the outer contour of the paper cover, set the heterochromatic point and macular detection area;对设定的异色点、黄斑检测区域，采用滑动窗口算法，检测纸盖表面的异色点和黄斑瑕疵；For the set detection area of heterochromatic points and macular, the sliding window algorithm is used to detect the heterochromatic points and macular defects on the surface of the paper cover;通过缩放纸盖的外轮廓，设置裂纹、破洞检测区域；Set the crack and hole detection area by scaling the outer contour of the paper cover;对设定的裂纹、破洞检测区域，采用滤波算法，进行裂纹和破洞检测；For the set crack and hole detection area, the filter algorithm is used to detect cracks and holes;采用模板匹配算法，对纸盖的吸管口情况进行检测；The template matching algorithm is used to detect the condition of the straw mouth of the paper cover;查找纸盖内部亮区域的外轮廓，根据轮廓特征，判断吸管口有无；Find the outer contour of the bright area inside the paper cover, and judge whether there is a straw mouth according to the contour features;采用曲率半径算法，判断透气孔有无；The curvature radius algorithm is used to determine whether there are ventilation holes;将检测结果传输给对应的回收机构，若纸盖表面存在缺陷，则回收机构工作；若纸盖表面正常，则回收机构不工作。The test results are transmitted to the corresponding recycling mechanism. If the surface of the paper cover is defective, the recycling mechanism will work; if the surface of the paper cover is normal, the recycling mechanism will not work.

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