CN114526674A - Method for measuring contact ratio in adhesive product - Google Patents
Method for measuring contact ratio in adhesive product Download PDFInfo
- Publication number
- CN114526674A CN114526674A CN202210105435.7A CN202210105435A CN114526674A CN 114526674 A CN114526674 A CN 114526674A CN 202210105435 A CN202210105435 A CN 202210105435A CN 114526674 A CN114526674 A CN 114526674A
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- CN
- China
- Prior art keywords
- frame
- area
- measuring
- measuring frame
- contact ratio
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000000853 adhesive Substances 0.000 title claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012935 Averaging Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Images
Classifications
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a method for measuring the contact ratio of adhesive products. The method is mainly applied to a high-precision dimension measuring instrument and mainly comprises the following steps of respectively placing a measuring frame 1 and a measuring frame 2 in two areas of a product image needing to be compared with the contact ratio, wherein the measuring frame needs to contain an area boundary, and extracting a target area according to the positions of the measuring frame 1 and the measuring frame 2; transversely dividing the target area extracted by the measuring frame 1 into 5 small areas which are longitudinally arranged; calculating the coordinates of the middle points of the two side lines of each small area in the frame 1; calculating the center lines of two side lines of the measuring frame 2; and calculating the coincidence degree of the target areas of the measuring frame 1 and the measuring frame 2.
Description
Technical Field
The invention belongs to a machine vision technology, is suitable for occasions needing to measure coaxial areas in industrial adhesive products, and mainly relates to a digital image processing technology.
Background
The invention provides a method for judging the contact ratio of a product by comparing the distance between the central lines of two areas in the contact ratio detection of an electronic adhesive part, which can generate larger errors along with the deformation of the product and the size of an extracted target area, and has low measurement precision.
Disclosure of Invention
The invention aims to solve the problem that a contact ratio measuring method can generate larger errors along with the deformation of a product and the size of a target area. In order to solve the technical problems, the invention is realized by the following technical scheme, and the measuring method mainly comprises the following steps:
(1) respectively placing a measuring frame 1 and a measuring frame 2 in a product area needing to be compared with the contact ratio, wherein one group of edges of two groups of edges of each frame is required to be axially vertical to the area, the other group of edges of each frame is required to be parallel to the axis of the area, and the two frames both contain symmetrical side lines of the area to be detected;
(2) extracting two target areas in the detection frame; dividing the target area extracted by the measuring frame 1 into 5 small areas transversely and longitudinally;
(3) calculating the coordinates of the central point of the inner edge line of 5 small areas in the measuring frame 1;
(4) calculating the center line of the target area sideline in the measuring frame 2;
(5) calculating the distance from the center point of each small region in the measuring frame 1 to the center line of the target region of the measuring frame 2;
(5) and (3) calculating the contact ratio according to a formula:
wherein S is the contact ratio, n is the number of small areas in the frame 1,
is the distance of the small area i from the centre line of the frame 2,
is all that
Is measured.
The product image described in the above method steps must have sharp edges. The measuring frame above is to be able to adapt to the change of angle. In the step (2), an automatic averaging mode is adopted to equally divide the target areas into 5, but the target areas are not limited to 5, and micro-divided areas can be added according to product characteristics.
Drawings
FIG. 1 is a schematic view of the placement of a measuring box in a product;
the numbers in the figures illustrate:
number 1: a measuring frame 1;
sequence number 2: a measuring frame 2;
sequence No. 3: measuring a frame 2 side line fitting line;
number 4: measuring the middle point of a small-area fitting line of a frame 1;
number 5: measuring a small area of a frame 1;
number 6: measuring a line fitting to the edge of a small area of the frame 1;
number 7: the distance from the middle point of the small area of the measuring frame 1 to the central line of the two side lines of the measuring frame 2 is obtained;
number 8: and measuring the center line of the sideline of the frame 2.
Claims (6)
1. The key points of the method for measuring the contact ratio in the adhesive product comprise the following steps: (1) placing a detection frame pair at a proper position; (2) the uniform frame 1 is a plurality of small areas, and the coordinates of the central point of each small area are calculated; (3) calculating the center line of the area of the frame 2; (4) respectively calculating the distance from the central point of each area in the frame 1 to the central line of the area in the frame 2; (5) and calculating the contact ratio according to a formula.
2. The important point (1) of claim 1, wherein each frame is required to include a pair of symmetrical edges, and the extending directions of the edges in the two frames are consistent.
3. The gist (2) of claim 1, wherein it is required to divide the regions in the vertical direction of the edge, and it is ensured that the edge in each cell is an even edge of the primary edge, and the number of the cells can be 5, but is not limited to 5.
4. The center line of the area in the gist (3) of claim 1 is taken as the axis of symmetry of the two side lines.
5. The gist (4) of claim 1 is the distance calculated from the center point of each small area of frame 1 to the center line of the area of frame 2 or its extension.
6. The formula in claim 1 in the gist (5) is:
wherein S is the contact ratio, n is the number of small areas in the frame 1,
is the distance from the small region i to the centerline of frame 2 and is the average of all.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210105435.7A CN114526674A (en) | 2022-01-28 | 2022-01-28 | Method for measuring contact ratio in adhesive product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210105435.7A CN114526674A (en) | 2022-01-28 | 2022-01-28 | Method for measuring contact ratio in adhesive product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114526674A true CN114526674A (en) | 2022-05-24 |
Family
ID=81623855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210105435.7A Pending CN114526674A (en) | 2022-01-28 | 2022-01-28 | Method for measuring contact ratio in adhesive product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114526674A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712887A (en) * | 2005-06-16 | 2005-12-28 | 姚晓栋 | On-the-spot printing circuit board test based on digital image |
| CN101769716A (en) * | 2008-12-30 | 2010-07-07 | 崔立新 | System and method for detecting geometric dimension of water outlet |
| CN103292701A (en) * | 2013-06-24 | 2013-09-11 | 哈尔滨工业大学 | Machine-vision-based online dimensional measurement method of precise instrument |
| CN103471477A (en) * | 2013-09-03 | 2013-12-25 | 中交天航南方交通建设有限公司 | Three-dimensional measuring instrument for hydraulic reclamation pipeline and application method of three-dimensional measuring instrument |
| CN103837100A (en) * | 2012-11-27 | 2014-06-04 | 中国二十冶集团有限公司 | Application of a laser tracker in the measurement of coaxiality of hollow shafts of a large-scale ball mill |
| CN108489426A (en) * | 2018-05-17 | 2018-09-04 | 信利半导体有限公司 | A kind of detection method and detecting system of non-rectangle display assembling product precision |
| CN111551134A (en) * | 2020-06-09 | 2020-08-18 | 哈尔滨锅炉厂有限责任公司 | Method for detecting integral coaxiality during assembling of gasification furnace |
| CN112461130A (en) * | 2020-11-16 | 2021-03-09 | 北京平恒智能科技有限公司 | Positioning method for visual inspection tool frame of adhesive product |
| CN214066986U (en) * | 2020-12-18 | 2021-08-27 | 大陆汽车电子（连云港）有限公司 | Fixed tool and contain CT scanning system of this fixed tool |
| CN113418495A (en) * | 2021-08-03 | 2021-09-21 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Method for measuring coaxiality of wind tunnel spray pipe |
-
2022
- 2022-01-28 CN CN202210105435.7A patent/CN114526674A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712887A (en) * | 2005-06-16 | 2005-12-28 | 姚晓栋 | On-the-spot printing circuit board test based on digital image |
| CN101769716A (en) * | 2008-12-30 | 2010-07-07 | 崔立新 | System and method for detecting geometric dimension of water outlet |
| CN103837100A (en) * | 2012-11-27 | 2014-06-04 | 中国二十冶集团有限公司 | Application of a laser tracker in the measurement of coaxiality of hollow shafts of a large-scale ball mill |
| CN103292701A (en) * | 2013-06-24 | 2013-09-11 | 哈尔滨工业大学 | Machine-vision-based online dimensional measurement method of precise instrument |
| CN103471477A (en) * | 2013-09-03 | 2013-12-25 | 中交天航南方交通建设有限公司 | Three-dimensional measuring instrument for hydraulic reclamation pipeline and application method of three-dimensional measuring instrument |
| CN108489426A (en) * | 2018-05-17 | 2018-09-04 | 信利半导体有限公司 | A kind of detection method and detecting system of non-rectangle display assembling product precision |
| CN111551134A (en) * | 2020-06-09 | 2020-08-18 | 哈尔滨锅炉厂有限责任公司 | Method for detecting integral coaxiality during assembling of gasification furnace |
| CN112461130A (en) * | 2020-11-16 | 2021-03-09 | 北京平恒智能科技有限公司 | Positioning method for visual inspection tool frame of adhesive product |
| CN214066986U (en) * | 2020-12-18 | 2021-08-27 | 大陆汽车电子（连云港）有限公司 | Fixed tool and contain CT scanning system of this fixed tool |
| CN113418495A (en) * | 2021-08-03 | 2021-09-21 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Method for measuring coaxiality of wind tunnel spray pipe |
Non-Patent Citations (1)
| Title |
|---|
| 金鹏;刘检华;刘少丽;孙鹏;王骁;: "基于中心线的管路端点位置精确测量方法", 计算机集成制造系统, no. 10, pages 1 - 6 * |
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Application publication date: 20220524 |
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