CN111649681B - Corrugated paper thickness detection method and corrugated paper production quality monitoring system - Google Patents
Corrugated paper thickness detection method and corrugated paper production quality monitoring system Download PDFInfo
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- CN111649681B CN111649681B CN202010559654.3A CN202010559654A CN111649681B CN 111649681 B CN111649681 B CN 111649681B CN 202010559654 A CN202010559654 A CN 202010559654A CN 111649681 B CN111649681 B CN 111649681B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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Abstract
The invention relates to corrugated paper processing. The corrugated paper thickness detection method comprises the following steps: based on a hardware system, the hardware system comprises a workbench, a foreground plate, a background plate, a camera, a computer and a display; firstly, a corrugated paper sample is placed on a table top of a workbench, a camera starts to acquire images, if the images only comprise the color of a foreground plate and the color of a background plate, the thickness of the corrugated paper sample is lower than the height of the foreground plate, and the section is unqualified in detection; if the image that the camera was shot includes foreground plate colour, boundary line, corrugated paper sample colour and background board colour, then the thickness of corrugated paper sample is higher than the height of foreground plate, and this workshop section detects qualifiedly. The corrugated paper production quality monitoring system adopts the corrugated paper thickness detection method to detect the quality of the corrugated paper. The invention improves the accuracy of the detection result. The accuracy of the detection result is improved. The production efficiency is improved. The reliability of the system is increased. The equipment manufacturing cost is low. Easy maintenance, reduced maintenance cost.
Description
Technical Field
The invention relates to the field of corrugated paper processing, in particular to a corrugated paper thickness detection method and a corrugated paper production quality monitoring system.
Background
At present, corrugated paper generally has to carry out thickness detection to the corrugated paper in process of production, in the production water line, rejects the corrugated paper that corrugated paper thickness is less than user's required value, prevents that the corrugated paper that thickness is not up to standard from getting into follow-up production flow, reduces the output of defective work, improves the qualification rate, and detection method adopts traditional scale to carry out thickness detection to the corrugated paper usually, and this kind of pure artificial thickness detection mode has the shortcoming such as inefficiency, the precision is low to the cost of labor is high, and it has the subjectivity to detect.
Along with the continuous development of science and technology, machine detection replaces traditional manual detection and is very necessary in corrugated paper production, and the quality problem of corrugated paper can better be detected out to the machine, improves the production efficiency of corrugated paper and the degree of automation of production to improve the accuracy of corrugated paper production, make work efficiency obtain improving, reduced the cost of labor, and the testing result has objectivity.
Disclosure of Invention
1. Technical problem to be solved
The purpose of the invention is: the corrugated paper thickness detection method can improve the automation degree of corrugated paper thickness detection, improve the detection accuracy and precision, reduce the input cost and improve the production efficiency.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
The corrugated paper thickness detection method is based on a hardware system, wherein the hardware system comprises a workbench, a foreground plate, a background plate, a camera and a computer;
the foreground plate is fixedly arranged at the right end of the table top of the workbench;
the background plate is fixedly arranged at the left end of the table top of the workbench;
the camera is fixedly arranged on the right side of the workbench and positioned above the table top of the workbench, the camera has a limited shooting range in the horizontal direction, the upper boundary of the shooting range of the camera is a shooting upper limit, and the lower boundary of the shooting range of the camera is a shooting lower limit;
the computer is in communication connection with the camera;
the horizontal line of the upper end plane of the foreground plate is positioned between the upper shooting limit and the lower shooting limit of the camera, the horizontal line of the lower end plane of the foreground plate is lower than the lower shooting limit, the horizontal line of the upper end plane of the background plate is higher than the upper shooting limit, and the horizontal line of the lower end plane of the background plate is lower than the lower shooting limit;
target to be detected: a corrugated paper sample placed between the foreground plate and the background plate;
the color of the corrugated paper sample shot by the camera is called as the color of the corrugated paper sample, the color of the foreground plate shot by the camera is the color of the foreground plate, the color of the background plate shot by the camera is the color of the background plate, and the boundary line between the color of the foreground plate and the color of the background plate in the image shot by the camera is called as the boundary line;
the specific process is as follows:
firstly, placing a corrugated paper sample on a table top of a workbench;
in the process b, the camera starts to collect images and transmits the collected images to the computer, the display can display the images collected by the camera, if the images shot by the camera comprise the color of the foreground plate, the color of the boundary line and the color of the background plate, the thickness of the corrugated paper sample is lower than the height of the foreground plate, and the section is unqualified in detection; if the image that the camera was shot includes foreground plate colour, boundary line, corrugated paper sample colour and background board colour, then the thickness of corrugated paper sample is higher than the height of foreground plate, and this workshop section detects qualifiedly.
Further, the computer can judge whether the thickness of the corrugated paper sample is qualified or not by judging whether the boundary line is complete or not.
Furthermore, the computer is provided with a preset value, the preset value is a thickness value required by the production of the corrugated paper sample, and the computer can judge whether the thickness of the corrugated paper sample is qualified or not by judging whether the boundary proportion of the corrugated paper sample after production is greater than the preset value or not.
Further, the camera is horizontally installed.
Furthermore, the wavelength range of the color of the foreground plate and the wavelength range of the color of the background plate have larger difference, and the color of the foreground plate and the color of the background plate have obvious difference.
The corrugated paper production quality monitoring system adopts the corrugated paper thickness detection method to detect the corrugated paper.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
firstly, a brand-new technical idea is provided.
Compared with the manual detection method in the prior art, the method needs workers to manually measure the dimension and then obtains the detection conclusion according to the comparison of the standard values, and the method can directly capture images through the camera and obtain the detection conclusion through computer calculation, so that the detection efficiency of the corrugated paper thickness is improved.
And thirdly, the automation degree of corrugated paper production is improved.
And fourthly, the accuracy of the detection result is improved.
And fifthly, the accuracy of the detection result is improved.
And sixthly, the input cost is reduced, and the production efficiency is improved.
And seventhly, the reliability of the system is improved by non-contact detection.
Eighthly, the manufacturing cost of the equipment is low.
And the mechanical structure is few, the maintenance is easy, and the maintenance cost is reduced.
Drawings
Fig. 1 is a schematic diagram showing a qualified product as a result of detecting a thickness of corrugated paper in embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a corrugated paper thickness detection result as a defective product in embodiment 1 of the present invention.
FIG. 3 is a flow chart of embodiment 2 of the present invention.
Fig. 4 is a flow chart of embodiment 3 of the present invention.
FIG. 5 test code for embodiment 3 of the present invention. The purpose of this disclosure of codes is to facilitate the reader's understanding of the method, and other codes related to common general knowledge are not disclosed in this application for economy of space and for ease of reading the emphasis.
Detailed Description
Example 1:
as shown in fig. 1-2, the corrugated paper thickness detection method is based on a hardware system, wherein the hardware system comprises a workbench T, a foreground plate S1, a background plate S2, a camera SXQ, and a computer; the foreground plate S1 is fixedly arranged at the right end of the table top of the workbench T; the background plate S2 is fixedly arranged at the left end of the table top of the workbench T; the camera SXQ is fixedly arranged on the right side of the workbench T and is positioned above the table top of the workbench T, the camera SXQ has a limited shooting range in the horizontal direction, the upper boundary of the shooting range of the camera SXQ is a shooting upper limit SXQ-SX, and the lower boundary of the shooting range of the camera SXQ is a shooting lower limit SXQ-XX; the computer is in communication connection with the camera SXQ; the horizontal line of the upper end plane of the foreground plate S1 is positioned between the shooting upper limit SXQ-SX and the shooting lower limit SXQ-XX of the camera SXQ, the horizontal line of the lower end plane of the foreground plate S1 is lower than the shooting lower limit SXQ-XX, the horizontal line of the upper end plane of the background plate S2 is higher than the shooting upper limit SXQ-SX, and the horizontal line of the lower end plane of the background plate S2 is lower than the shooting lower limit SXQ-XX; target to be detected: a corrugated paper sample YP between the foreground plate S1 and the background plate S2; the color of the corrugated paper sample YP shot by the camera SXQ is called as the color S-YP of the corrugated paper sample, the color of the foreground plate S1 shot by the camera SXQ is the color S-S1 of the foreground plate, the color of the background plate S2 shot by the camera SXQ is the color S-S2 of the background plate, and the boundary line between the color S-S1 of the foreground plate shot by the camera SXQ and the color S-S2 of the background plate is called as the boundary line S-BJ;
the specific process is as follows:
the process a comprises the steps of firstly, placing a corrugated paper sample YP on a T table top of a workbench;
in the process b, the camera SXQ starts to collect images, the collected images are transmitted to a computer, the computer judges whether the collected images comprise the color (S-YP) of the corrugated paper sample, if the images shot by the camera SXQ only comprise the color S-S1 of the foreground plate and the color S-S2 of the background plate, the thickness of the corrugated paper sample YP is lower than the height of the foreground plate S1, and the section is unqualified in detection; if the image shot by the camera SXQ comprises the color S-S1 of the foreground plate, the color S-YP of the corrugated paper sample and the color S-S2 of the background plate, the thickness of the corrugated paper sample YP is higher than the height of the foreground plate S1, and the section is qualified.
Example 2:
as shown in fig. 3, based on the embodiment 1, the corrugated paper thickness detecting method includes the following operation steps in the process b:
step 1: the computer acquires a shot image from the camera SXQ;
step 2: judging whether the boundary line S-BJ in the acquired image is complete or not by the computer; if the boundary line S-BJ is complete, the thickness of the corrugated paper sample YP between the foreground plate S1 and the background plate S2 is lower than the lower limit of the standard, and the detection at the section is unqualified; if the boundary line S-BJ is not complete, the thickness of the corrugated paper sample YP between the foreground plate S1 and the background plate S2 is higher than the lower standard limit, and the detection of the section is qualified.
Example 3:
as shown in fig. 4-5, the operation steps of the process b based on the implementation 1 are as follows:
step 1: the computer acquires a shot image from the camera SXQ;
step 2: step 2 has the following sub-operations:
step 2.1: counting colors and the proportion of each color in the image by a computer;
step 2.2: determining a primary color and a secondary color;
step 2.3: determining a detection boundary and a measurement threshold;
step 2.4: recording the number of boundary points of each column;
step 2.5: counting the rows with the most boundary points, which are called boundary rows;
step 2.6: calculating the boundary points of the boundary rows, wherein the ratio of the boundary points to the boundary rows is called the boundary ratio;
step 2.7: judging whether the boundary proportion is larger than a preset value; if the boundary line S-BJ of the boundary line is complete, the thickness of the corrugated paper YP is lower than the lower limit of the standard, and the section is unqualified in detection; if the boundary line S-BJ of the boundary line is damaged by the sample color S-YP, the thickness of the corrugated paper YP is larger than the lower limit of the standard, and the section is qualified.
The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art will appreciate that the techniques disclosed herein are not limited to the specific embodiments disclosed; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the protection of the present invention.
Claims (7)
1. The corrugated paper thickness detection method is characterized by comprising the following steps: based on a hardware system, the hardware system comprises a workbench (T), a foreground plate (S1), a background plate (S2), a camera (SXQ) and a computer;
the foreground plate (S1) is fixedly arranged at the right end of the table top of the workbench (T);
the background plate (S2) is fixedly arranged at the left end of the table top of the workbench (T);
the camera (SXQ) is fixedly arranged on the right side of the workbench (T) and is positioned above the table top of the workbench (T), the camera (SXQ) has a limited shooting range in the horizontal direction, the upper boundary of the shooting range of the camera (SXQ) is a shooting upper limit (SXQ-SX), and the lower boundary of the shooting range of the camera (SXQ) is a shooting lower limit (SXQ-XX);
the computer is in communication connection with a camera (SXQ);
the horizontal line of the upper end plane of the foreground plate (S1) is positioned between the shooting upper limit (SXQ-SX) and the shooting lower limit (SXQ-XX) of the camera (SXQ), the horizontal line of the lower end plane of the foreground plate (S1) is lower than the shooting lower limit (SXQ-XX), the horizontal line of the upper end plane of the background plate (S2) is higher than the shooting upper limit (SXQ-SX), and the horizontal line of the lower end plane of the background plate (S2) is lower than the shooting lower limit (SXQ-XX);
a corrugated paper sample (YP) placed between the foreground plate (S1) and the background plate (S2) based on the object to be inspected;
the color of a corrugated paper sample (YP) shot by a camera (SXQ) is called as a corrugated paper sample color (S-YP), the color of a foreground plate (S1) shot by the camera (SXQ) is a foreground plate color (S-S1), the color of a background plate (S2) shot by the camera (SXQ) is a background plate color (S-S2), and a boundary line between the foreground plate color (S-S1) and the background plate color (S-S2) in an image shot by the camera (SXQ) is called as a boundary line (S-BJ);
the specific process is as follows:
the process a comprises the steps of firstly, placing a corrugated paper sample (YP) on the table top of a workbench (T);
in the process b, a camera (SXQ) starts to collect an image, the collected image is transmitted to a computer, the computer judges whether the collected image comprises a color (S-YP) of a corrugated paper sample, if the image shot by the camera (SXQ) comprises a foreground plate color (S-S1) and a background plate color (S-S2), the thickness of the corrugated paper sample (YP) is lower than the height of the foreground plate (S1), and the process is unqualified in detection; if the image shot by the camera (SXQ) comprises the color of the foreground plate (S-S1), the color of the corrugated paper sample (S-YP) and the color of the background plate (S-S2), the thickness of the corrugated paper sample (YP) is higher than the height of the foreground plate (S1), and the flow is qualified.
2. The corrugated paper thickness detection method according to claim 1, characterized in that: the computer can also judge whether the thickness of the corrugated paper sample (YP) is qualified or not by judging whether the boundary line (S-BJ) is complete or not.
3. The corrugated paper thickness detection method according to claim 1, characterized in that: the computer is provided with a preset value, the preset value is a thickness value required by the production of the corrugated paper sample (YP), and the computer can also judge whether the thickness of the corrugated paper sample (YP) is qualified or not by judging whether the boundary proportion of the corrugated paper sample (YP) after the production is larger than the preset value or not.
4. The corrugated paper thickness detection method according to claim 1, characterized in that: the camera (SXQ) is horizontally arranged.
5. The corrugated paper thickness detection method according to claim 1, characterized in that: the wavelength range of the foreground plate color (S-S1) and the wavelength range of the background plate color (S-S2) are greatly different, and the foreground plate color (S-S1) and the background plate color (S-S2) are obviously different.
6. The method for detecting the thickness of the corrugated paper as claimed in claim 1, wherein the computer is provided with a display, and images shot by the camera are displayed on the display.
7. The corrugated paper production quality monitoring system is characterized in that the corrugated paper is detected by the corrugated paper thickness detection method of claim 1.
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| JP2000146863A (en) * | 1998-11-11 | 2000-05-26 | Nireco Corp | Inspection-device for upper surface deposit of plate-like body |
| DE10346467A1 (en) * | 2003-10-02 | 2005-05-19 | E.C.H. Will Gmbh | Measuring device and method for checking the cut quality of a sheet |
| JP5227246B2 (en) * | 2009-04-28 | 2013-07-03 | 株式会社ホニック | Glue application inspection device |
| CN104999504B (en) * | 2015-05-29 | 2017-03-15 | 深圳市慧大成智能科技有限公司 | A kind of measuring method of corrugated board size and separation line ball control method and system |
| CN105551020B (en) * | 2015-12-03 | 2019-03-26 | 浙江大华技术股份有限公司 | A kind of method and device detecting object size |
| CN105403146A (en) * | 2015-11-05 | 2016-03-16 | 上海卓易科技股份有限公司 | Object size measurement method and system and intelligent terminal |
| JP6227024B2 (en) * | 2016-01-29 | 2017-11-08 | 三菱重工印刷紙工機械株式会社 | Cardboard sheet defect detection apparatus, cardboard sheet defect removal apparatus, and corrugated sheet manufacturing apparatus |
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