CN111855576A - Coiled material detection system and detection method - Google Patents
Coiled material detection system and detection method Download PDFInfo
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- CN111855576A CN111855576A CN202010786781.7A CN202010786781A CN111855576A CN 111855576 A CN111855576 A CN 111855576A CN 202010786781 A CN202010786781 A CN 202010786781A CN 111855576 A CN111855576 A CN 111855576A
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- coiled material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The invention provides a coiled material detection system, which comprises a camera assembly, a conveyor belt assembly, a controller and a processor, wherein the conveyor belt assembly is used for uncoiling a coiled material and enabling the coiled material to move along the moving direction of a conveyor belt and transmitting the moving distance of the coiled material to the processor; the camera assembly is transversely arranged above the coiled material and used for scanning the moving coiled material and transmitting scanning data to the processor in real time; the controller is used for controlling the movement of the conveyor belt and controlling the transverse movement of the camera assembly according to the instruction of the processor; the processor receives the moving distance of the conveyor belt and sends out an instruction for transversely moving the camera assembly when the moving distance reaches a preset length; the processor is also used for analyzing and processing the scanning data to obtain the abnormal quantity, and judging the quality of the coiled material according to the abnormal quantity. The system of the invention has the advantages of small occupied space, high detection efficiency and good accuracy, and can well complete the detection work of the coiled materials.
Description
Technical Field
The invention relates to the field of anomaly detection, in particular to the technical field of machine vision detection.
Background
In the production process of large-size coiled materials, particularly coiled materials such as coil paper, coil cloth or coil steel and the like, due to the problems of production process, environmental influence or improper storage, the coiled materials can have the problems of cracks, folds, scars, dirt and the like, and the use of the coiled materials is seriously influenced. And therefore the quality of the web is particularly important to detect.
The detection to the coiled material among the prior art includes directly scanning whole coiled material with the camera, obtains the problem point of whole coiled material, and such detection mode accuracy is high, because the width of coiled material is too big, the image at camera field of vision edge can produce the distortion, has also reduced the detection accuracy to a certain extent. Of course, various processing means can be used to remove the distortion subsequently, but the operation is complicated and the cost is increased. Another way is to scan side by side with multiple cameras, however, overlapping images acquired by the cameras can cause repeated counting, which causes problems such as misjudgment. Because the coiled material is very long, the time is wasted by scanning all the coiled material, and the detection efficiency is reduced. To solve the above problems, the present invention provides a coiled material detection system and method.
Disclosure of Invention
A web inspection system comprising an assembly camera, a conveyor assembly, a controller, a processor,
the conveyor belt assembly is used for unwinding the coiled material and enabling the coiled material to move along the moving direction of the conveyor belt and transmitting the moving distance of the coiled material to the processor;
the camera assembly is transversely arranged above the coiled material and used for scanning the moving coiled material and transmitting scanning data to the processor in real time;
the controller is used for controlling the movement of the conveyor belt and controlling the transverse movement of the camera assembly according to the instruction of the processor;
the processor receives the moving distance of the conveyor belt and sends out an instruction for transversely moving the camera assembly when the moving distance reaches a preset length; the processor is also used for analyzing and processing the scanning data to obtain the abnormal quantity, and judging the quality of the coiled material according to the abnormal quantity.
The conveying belt assembly comprises a conveying belt and a first motor for driving the conveying belt to move, and two rollers which are vertically tangent and oppositely rotate are arranged on one side of the conveying belt in the length direction and used for clamping and moving coiled materials; the roller is driven by a second motor, and the first motor and the second motor rotate to enable the rotating speeds of the roller and the conveyor belt to be the same; the width direction of the conveyor belt is parallel to the axial direction of the roller.
And a rotation counter and a microprocessor are arranged on one side of the roller, the microprocessor calculates the moving distance of the coiled material according to the number of rotation turns of the roller and the circumference of the roller, and transmits the moving distance to the processor.
The conveying belt assembly is characterized in that the two sides of the conveying belt assembly are respectively provided with a support used for sleeving the coiled material, and a fourth motor used for controlling the support to rotate, and the rotating speeds of the fourth motor, the first motor and the second motor are the same.
The camera assembly comprises a scanning camera, the scanning camera is arranged on a sliding block on the cross beam, and the sliding block is controlled by a third motor to move transversely.
The camera assembly further comprises an illumination light source disposed at an edge of the scanning camera.
A coiled material detection method adopting the detection system is characterized in that:
1) the conveying belt assembly unfolds the coiled material and drives the coiled material to move along the conveying belt direction;
2) the camera assembly is arranged at one quarter of one side of the width direction of the coiled material and scans the unfolded coiled material;
3) when the scanning distance reaches a preset length, controlling the camera assembly to transversely move to three quarters of the width direction of the coiled material, and continuing to scan;
4) and when the scanning distance reaches the preset length, analyzing and processing the scanning data, counting the abnormal quantity, judging that the coiled material is unqualified if the abnormal quantity reaches a first threshold value, and simultaneously stopping scanning.
In the step 4), if the abnormal quantity does not reach the first threshold value, controlling the camera assembly to return to one quarter of the position on one side of the width direction of the coiled material, and scanning 1/2 with the scanning distance being the preset length; then controlling the camera assembly to move to three quarters of one side of the width direction of the coiled material, and scanning 1/2 with a preset length; stopping scanning; and analyzing and processing all the scanning data, counting the abnormal quantity, judging that the coiled material is unqualified if the abnormal quantity reaches a second threshold value, and otherwise, judging that the coiled material is qualified.
After the detection is finished, the processor sends out an instruction to control the first motor, the second motor and the fourth motor to rotate reversely, and the coiled material is recovered.
The invention has the following beneficial technical effects:
(1) the scanning camera only detects the coiled material with half width, the visual field is small, and the visual field edge is undistorted or less distorted, so that the judgment is more accurate;
(2) scanning one side first and then the other side allows both sides to be compromised without compromising, representing to a large extent the quality of the entire coil.
(3) When the quantity threshold value is not reached after one period, the quality of the product is further confirmed by half-period detection instead of being judged to be qualified, and erroneous judgment and missing judgment are avoided.
(4) The technical scheme greatly improves the detection efficiency on the whole, has higher accuracy and achieves good balance between cost and benefit.
Drawings
FIG. 1 is a schematic front view of a web inspection system.
FIG. 2 is a schematic top view of a web inspection system.
FIG. 3 is a schematic view of a web inspection process.
The reference numerals are explained below: conveyor belt 1, cylinder 2, support 3, scanning camera 4, coiled material 5, crossbeam 6.
Detailed description of the preferred embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
A web inspection system and an inspection method thereof according to the disclosed embodiments of the invention will be described in detail with reference to the accompanying drawings.
Example 1:
the coiled material detecting system that this embodiment provided can improve detection efficiency in less space through the detection area of reasonable selection coiled material. The system includes a conveyor belt assembly, a camera assembly, a controller, and a processor. As can be seen from fig. 1 and 2, the conveyor belt assembly includes a conveyor belt 1 and two rollers 2 arranged on one side of the conveyor belt in a vertical tangent manner, and when the coiled material is unfolded and placed between the two rollers 2, the rollers 2 rotate in opposite directions to continuously unfold the coiled material and place the coiled material on the conveyor belt. The conveyor belt 1 is driven in motion by a first motor and the two rollers 2 are driven in motion by a second motor, the first and second motors moving at the same speed of rotation, so that the rollers 2 rotate at the same linear speed as the conveyor belt 1, so that the unwound coil 5 can be fed forward synchronously. And a rotation counter and a microprocessor are arranged on one side of the roller 2, the microprocessor calculates the moving distance of the coiled material according to the number of rotation turns of the roller and the circumference of the roller, and transmits the moving distance to the processor.
And the two sides of the conveying belt assembly are respectively provided with a support 3 for sleeving the coiled material and a fourth motor for controlling the rotation of the support, the support close to one side of the roller 2 rotates to release the coiled material, and the support far away from one side of the roller rotates to rewind the coiled material. The fourth motor has the same rotating speed as the first motor and the second motor.
The cross over the conveyer belt is provided with a support for supporting the camera assembly, the support comprises a cross beam 6, a sliding block is arranged on the cross beam, and the camera assembly is arranged on the sliding block. The slider passes through the screw rod and links to each other with the third motor that sets up in crossbeam one side, through the drive of third motor, the slider can drive camera subassembly along conveyer belt width direction removes. The camera assembly comprises a scanning camera 4 and an illumination source which is linked with the scanning camera 4 and is switched on while scanning.
The processor receives the moving distance of the conveyor belt 1 and sends out a command of transversely moving the camera assembly when the moving distance reaches a preset length; the processor is also used for analyzing and processing the scanning data to obtain the abnormal quantity, and judging the quality of the coiled material according to the abnormal quantity.
The controller is respectively electrically connected with the first motor, the second motor, the third motor, the fourth motor, the microprocessor and the microprocessor. Used for controlling the movement of the conveyor belt and controlling the transverse movement of the camera component and the movement of each motor according to the instructions of the processor.
The detection system disclosed by the invention is simple in structure and small in occupied space, the roller 2, the support 3 and the conveyor belt 1 are mutually matched in a rotating mode, so that the coiled material is effectively detected in the moving process, the space is saved, meanwhile, the preset distance is limited, the coiled material does not need to be completely unfolded for detection, and the detection efficiency is improved.
Example 2:
this embodiment describes a web inspection method for an inspection system, which includes the following steps in conjunction with FIG. 3
1) The conveying belt assembly unfolds the coiled material and drives the coiled material to move along the conveying belt direction;
2) the camera assembly is arranged at one quarter of one side of the width direction of the coiled material and scans the unfolded coiled material;
3) when the scanning distance reaches a preset length, controlling the camera assembly to transversely move to three quarters of the width direction of the coiled material, and continuing to scan;
4) and when the scanning distance reaches the preset length, analyzing and processing the scanning data, counting the abnormal quantity, judging that the coiled material is unqualified if the abnormal quantity reaches a first threshold value, and simultaneously stopping scanning.
In the step 4), if the abnormal quantity does not reach the first threshold value, controlling the camera assembly to return to one quarter of the position on one side of the width direction of the coiled material, wherein the scanning distance is 1/2 with the preset length; then controlling the camera assembly to move to three quarters of one side of the width direction of the coiled material, and scanning 1/2 with a preset length; stopping scanning; and analyzing and processing all the scanning data, counting the abnormal quantity, judging that the coiled material is unqualified if the abnormal quantity reaches a second threshold value, and otherwise, judging that the coiled material is qualified.
After the detection is finished, the processor sends out an instruction to control the first motor, the second motor and the fourth motor to rotate reversely, and the coiled material is recovered.
Specifically, the method of this embodiment will be described in detail, taking as an example a roll paper having a total length of about 20 meters.
Preparing a randomly selected roll paper with the total length of about 20 meters, wherein the roll paper is large-size newsprint or large-size rice paper and the width of the roll paper is 2 meters; thus, a web side 1/4 of 0.5 meters was obtained, and a web side 3/4 of 1.5 meters was obtained. And if the preset length is set to be 2 meters, half of the preset length is 1 meter. The first threshold value was set to 1/9 which was the threshold value for the number of anomalies when the entire roll paper was acceptable, and the second threshold value was set to 3/20 which was the threshold value for the number of anomalies when the entire roll paper was acceptable. The setting of the two thresholds can avoid misjudgment caused by uneven abnormal distribution to a certain extent.
And starting the support, the roller and the transmission belt to rotate, starting the camera to scan, and detecting the roll paper according to the preset parameters. The stock form can be by follow-up support rewinding after the scanning, need not all expand the stock form, therefore occupation space is less. Meanwhile, the camera has a narrow shooting view, so that the problem of subsequent data processing caused by distortion is solved, the detection time is saved, and the overall detection time is about 3 minutes. Much less than the total detection time.
Example 3:
the same batch of 50 rolls of paper as in example 2 was selected, both 20 meters in length and 2 meters in width. The abnormal quantity of each roll paper is detected by a conventional method, the counted unqualified quantity is 12, the qualified quantity is 38, each detection time is about 10 minutes, and the total used time is about 10 hours. Each web was then tested in turn using the method of example 2 for a total test time of about 3 minutes, not more than 3 hours. The detection result shows that only one of the unqualified coil paper is judged to be qualified by mistake, only two of the qualified coil paper are judged to be unqualified by mistake, and the accuracy reaches 94 percent. Therefore, the technical scheme provided by the invention has high accuracy while improving the detection efficiency.
The expressions "exemplary embodiment," "example," and the like, as used herein, do not refer to the same embodiment, but are provided to emphasize different particular features. However, the above examples and exemplary embodiments do not preclude their implementation in combination with features of other examples. For example, even in a case where a description of a specific example is not provided in another example, unless otherwise stated or contrary to the description in the other example, the description may be understood as an explanation relating to the other example.
The terminology used in the present invention is for the purpose of illustrating examples only and is not intended to be limiting of the invention. Unless the context clearly dictates otherwise, singular expressions include plural expressions.
While example embodiments have been shown and described, it will be apparent to those skilled in the art that modifications and changes may be made without departing from the scope of the invention as defined by the claims.
Claims (9)
1. A web inspection system comprising a camera assembly, a conveyor assembly, a controller, a processor,
the conveyor belt assembly is used for unwinding the coiled material and enabling the coiled material to move along the moving direction of the conveyor belt and transmitting the moving distance of the coiled material to the processor;
the camera assembly is transversely arranged above the coiled material and used for scanning the moving coiled material and transmitting scanning data to the processor in real time;
the controller is used for controlling the movement of the conveyor belt and controlling the transverse movement of the camera assembly according to the instruction of the processor;
the processor receives the moving distance of the conveyor belt and sends out an instruction for transversely moving the camera assembly when the moving distance reaches a preset length; the processor is also used for analyzing and processing the scanning data to obtain the abnormal quantity, and judging the quality of the coiled material according to the abnormal quantity.
2. The coiled material detection system as claimed in claim 1, wherein the conveyor belt assembly comprises a conveyor belt and a first motor for driving the conveyor belt to move, and two rollers which are vertically tangent and rotate oppositely are arranged on one side of the conveyor belt in the length direction and are used for clamping and moving coiled materials; the roller is driven by a second motor, and the first motor and the second motor rotate to enable the rotating speeds of the roller and the conveyor belt to be the same; the width direction of the conveyor belt is parallel to the axial direction of the roller.
3. The web detection system of claim 2, wherein a rotation counter and a microprocessor are provided at one side of the roller, the microprocessor calculates a moving distance of the web based on the number of rotations of the roller and a circumference of the roller and transmits the moving distance to the processor.
4. The coiled material detection system as claimed in claim 1, wherein a support for sleeving the coiled material and a fourth motor for controlling the rotation of the support are respectively arranged on two sides of the conveyor belt assembly, and the rotation speed of the fourth motor is the same as that of the first motor and that of the second motor.
5. The web inspection system of claim 1, the camera assembly including a scanning camera mounted on a slide on the beam, the slide being controlled for lateral movement by a third motor.
6. The web inspection system of claim 4, the camera assembly further comprising an illumination source disposed at an edge of the scanning camera.
7. A web inspection method using the inspection system of any one of claims 1-6, characterized by:
1) the conveying belt assembly unfolds the coiled material and drives the coiled material to move along the conveying belt direction;
2) the scanning camera is arranged at one quarter of one side of the width direction of the coiled material and is used for scanning the unfolded coiled material;
3) when the scanning distance reaches a preset length, controlling the camera assembly to transversely move to three quarters of the width direction of the coiled material, and continuing to scan;
4) and when the scanning distance reaches the preset length, analyzing and processing the scanning data, counting the abnormal quantity, judging that the coiled material is unqualified if the abnormal quantity reaches a first threshold value, and simultaneously stopping scanning.
8. The web detecting method according to claim 7, in step 4), if the number of the abnormalities does not reach the first threshold, controlling the camera assembly to return to one quarter of the width direction of the web, and scanning for 1/2 of a preset length; then controlling the camera assembly to move to three quarters of one side of the width direction of the coiled material, and scanning 1/2 with a preset length; stopping scanning; and analyzing and processing all the scanning data, counting the abnormal quantity, judging that the coiled material is unqualified if the abnormal quantity reaches a second threshold value, and otherwise, judging that the coiled material is qualified.
9. The web material detection method according to claim 7 or 8, wherein the processor issues instructions to control the first motor, the second motor and the fourth motor to rotate reversely to recover the web material after the detection is completed.
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| CN202010786781.7A CN111855576B (en) | 2020-08-07 | 2020-08-07 | Coiled material detection system and detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010786781.7A CN111855576B (en) | 2020-08-07 | 2020-08-07 | Coiled material detection system and detection method |
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| CN111855576A true CN111855576A (en) | 2020-10-30 |
| CN111855576B CN111855576B (en) | 2023-08-18 |
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2020
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| US4914285A (en) * | 1988-12-27 | 1990-04-03 | Eastman Kodak Company | Control means for web scanning apparatus |
| CN102221563A (en) * | 2011-03-23 | 2011-10-19 | 梅州泰源科技有限公司 | Apparatus for automatically inspecting defects of PCB (printed circuit board) |
| US20160314573A1 (en) * | 2015-04-27 | 2016-10-27 | Thermoteknix Systems Limited | Conveyor Belt Monitoring System and Method |
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