CN115165921A - Detection method of shoulder surface water ripple based on cone - Google Patents
Detection method of shoulder surface water ripple based on cone Download PDFInfo
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- CN115165921A CN115165921A CN202210708069.4A CN202210708069A CN115165921A CN 115165921 A CN115165921 A CN 115165921A CN 202210708069 A CN202210708069 A CN 202210708069A CN 115165921 A CN115165921 A CN 115165921A
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- light
- cone
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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
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
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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
Abstract
A detection method for shoulder surface water ripples based on a cone comprises a camera and a glass bottle with a bottle shoulder, wherein the camera is arranged right above a central shaft of the glass bottle, a light-emitting plate is arranged between the camera and the glass bottle, a light-transmitting plate is further arranged on the lower portion of the light-emitting plate, the light-transmitting plate and the light-emitting plate jointly form a trapezoidal cone with two large ends and a small middle part, the central shaft of the two trapezoidal cones is superposed with the central shaft of the camera, and black stripes which are equiangular and radial are arranged on the light-transmitting plate. The light-transmitting plate with the radial black stripes has the advantages that when light passes through the light-transmitting plate, one part of light is blocked by the black stripes, and the other part of light continues to pass through, so that light and shade alternate stripes are formed on the bottle shoulder; through black and white contrast, the phenomenon is obvious, easily discernment detects shoulder ripple.
Description
Technical Field
The invention relates to a detection device, in particular to a detection device based on surface ripples of a conical body.
Background
Conical objects that we often touch are numerous, such as the shoulder of a glass bottle. Because the human eye observes the circular cone, only a narrow visual angle is accurate visual for the human eye, and other visual angles are due to radian deviation, and human eyes can not effectively observe details therein, such as slight scratch, cat scratch and the like.
The glass bottle is widely used as a traditional packaging material, and the detection of the bottle shoulder of the glass bottle is particularly important.
In the process of mass production of glass bottles, people find that the surface of the glass bottle often has poor appearance defects: on the bottle shoulder mold closing line, mold closing lines 5 (see fig. 4) which are wide but have extremely small projections appear; long stripes with light color and extremely small depth appear on the bottle body and the bottle shoulder of the glass bottle, and are called as cat scratch 6 (see figure 4); in addition, slight scratches 7 (fig. 4) of different lengths (more than 0.5cm, with negligible excess length) and disorientation occur, in which there may also be lines of stretch, cold, washboard, or other long and continuous blocks of streaks, these light traces being collectively referred to as waviness.
The bottle shoulder is inclined, a certain blind area is arranged at the joint of the bottle mouth, and a plurality of strands of convex or concave circles (shown in figures 1-3) are arranged at the inclined position, so that manual detection is very difficult. In addition, the cost of the surface painting or baking paint of the glass bottle is high and cannot be recycled, and the cost of the glass bottle is low and can be recycled, so that manufacturers hope to filter unqualified products and return the products to a furnace for remanufacturing before the surface process is eliminated, and the loss is greatly reduced.
In addition, the manual detection has the following disadvantages:
1. the efficiency is extremely low, and the manual work can only detect one by one, though do not need people's hand to take up and rotate 360 degrees, people's eye and light source direction are in the homonymy, and the difficult accurate bottle shoulder ripple detail of observing.
2. The labor intensity is high, eyes need to visually observe the reflected light of the light source on the bottle shoulder, and the convex part of the glass bottle shoulder is in mirror reflection, so that the eyes can be injured by too strong light.
3. Even if the water ripples are visible, the number of lines, length, width, and depth cannot be clearly seen, and quantification cannot be performed.
4. The manual light inspection is easy to cause eye injury and fatigue, and the water ripple cannot be detected manually on line.
Therefore, an organic visual scheme is urgently needed, a measured object is positioned through a sensor, online detection is carried out, and bad defects are identified in time.
Disclosure of Invention
In order to solve the technical problem, the invention provides an online real-time detection device for the defect of poor shoulder of a glass bottle.
The scheme provided by the invention is as follows:
the utility model provides a shoulder surface ripple detection method based on cone, including a camera and a cone of taking the shoulder, the camera is arranged in directly over the cone center pin, be equipped with a luminescent plate between camera and the cone, a serial communication port, the luminescent plate lower part still is equipped with a light-passing board, light-passing board and luminescent plate constitute the trapezoidal face cone big in two, the centre is little jointly, and two trapezoidal face conical center pins coincide in the camera center pin, be equipped with the equidirectional on the light-passing board, be radial black stripe, the camera is shot in real time to the cone and is detected and upload computer terminal, when discovering there is shoulder body ripple, judge as non-genuine.
Further, the computer stores a certified product as a standard map;
if the detection map is completely consistent with the standard map, the standard map is represented as a genuine product;
or judging the grade of the cone to be detected according to the defect of the detection map compared with the standard map.
Further, the light emitting panel is a single-sided annular light source, and emits light uniformly only to the outside.
Furthermore, the extension line of the light-emitting plate is perpendicular to the surface of the tested cone.
Further, the light-transmitting width of the light-transmitting plate is consistent from top to bottom.
Furthermore, the black stripes of the light-transmitting plate have 50-100 stripes.
Furthermore, the included angle between the two surfaces of the light-transmitting plate and the light-emitting plate is an obtuse angle, and the angle is adjustable.
Further, the cone is a bottle body with a shoulder.
A detection method based on the surface ripples of a cone body, and a detection device can be used for industrial assembly line online production detection.
The invention has the beneficial effects that:
1. the light-transmitting plate with the radial black stripes is arranged, when light passes through the light-transmitting plate, one part of light is blocked by the black stripes, the other part of light continuously passes through the light-transmitting plate, and light and shade alternate stripes are formed on the bottle shoulder. If the shoulder is flat and smooth, the stripes are radially and uniformly distributed by taking the central axis of the shoulder as the center. If the bottle shoulder is defective, the reflection and refraction generated when light strikes the defective position are different from the fringes of the normal bottle shoulder, the light interference is strengthened, the shape of the black fringe is changed and is not a standard radial straight line, and the black fringe is bent or appears in a spiral shape or bright spots in the middle of the black fringe; through black-white light-dark contrast, the phenomenon is obvious, and the identification and detection are easier; the shoulder water ripple is judged by the method.
2. The luminous plate is arranged perpendicular to the bottle shoulder slope, so that the bottle shoulder slope is uniformly illuminated, and defects are conveniently identified.
3. The light transmission width of the light transmission plate is consistent up and down, and parallel irradiation means that illumination is isolated by the grating or passes through the grating, so that parallel light is formed, and even irradiation means that the light transmission parallel light irradiates on the water ripple part, so that the light transmission parallel light is further increased and easy to identify and detect.
4. The included angle between the light transmission plate and the two surfaces of the light emitting plate is an obtuse angle, and the angle is adjustable, so that the light transmission plate is beneficial to being suitable for bottles with different shoulder slopes.
Drawings
FIG. 1 is a prior art view of a glass bottle body and shoulder;
FIG. 2 is an enlarged view of the shoulder of FIG. 1;
FIG. 3 is an enlarged view of the second shoulder of FIG. 1;
FIG. 4 is a water ripple formed by the bottle body and the bottle shoulder of the glass bottle;
FIG. 5 is a schematic diagram of the structure of the detection method of the water ripple on the shoulder surface based on the cone of the present invention;
FIG. 6 is a side view of the light-transmitting plate structure of the detecting device of the present invention;
FIG. 7 is a first schematic diagram of a light-emitting plate structure of the detecting device of the present invention;
FIG. 8 is a second schematic diagram of a light-emitting plate structure of the detecting device of the present invention;
FIG. 9 is an exemplary illustration of a water wave line for a bottle shoulder in accordance with an embodiment of the present invention;
wherein, 1-circle; 2-bottle shoulder water ripple; 3-a bottle shoulder joint line; 4-shoulder circle; 5-mold closing lines; 6-water ripple or cat scratch; 7-slight scratch;
10-a camera; 20-a light-emitting panel; 30-a light-transmitting plate; 301-black stripes; 40-shoulder of the bottle; 50-a bottle shoulder extension line; 60-bottle body;
501-downward extension line of bottle shoulder; 502-bottle shoulder vertical extension line.
Detailed description of the preferred embodiments
The present invention is explained in more detail below by means of examples, which are only illustrative and the scope of protection of the present invention is not limited by these examples.
The glass bottle shoulder is a cone and a plurality of convex-concave circles. Therefore, if a plane light source is used for irradiation, the light cannot be uniformly received by each surface, part of the positions are over-exposed, and part of the positions are dim, so that the exposure time cannot be stabilized by taking a picture with a camera. If the cambered surface light source is adopted for irradiation, the cambered surface can be uniformly illuminated, but the slightly convex and concave water ripples can be uniformly illuminated, and the camera cannot identify the water ripples.
According to the scheme, the water ripple definition of a client is deeply understood, so that a detection strategy is formulated.
Bottle shoulder water ripple definition: because of the texture, the texture is a curve with a long distance and a large length. Therefore, the water ripple details do not need to be completely identified, and defective products can be judged according to the degree as long as the water ripple details have an approximate trend and an initial point. If the water ripple is too narrow, too shallow, too short and too small, the influence on the light sensitivity of a customer is almost ignored, and the surface painting process can cover the problem and can be regarded as a good product without identifying the good product too sensitively.
From the equipment use side, namely, glass bottle manufacturing enterprises, the water ripple is not completely avoided, but the number, the length and the area of the water ripple are required, and the water ripple cannot be excessive. Therefore, the standard for detecting the water ripples is also a missing detection which allows a small amount of water ripples. After the glass bottle surface painting process is finished, the water ripple influence degree is detected and judged again.
In this way, we examine the strategy that it is not necessary to completely observe the detail features of the ripple, but rather, the influence degree of the ripple on the picture consistency can be probably seen.
Referring to fig. 5, which is a schematic diagram of the present invention, in order to facilitate understanding of the technical solution of the present invention, a bottle shoulder extension 50 is assumed on a bottle body 60, a downward line segment of the bottle shoulder extension 50 along a slope of the bottle shoulder is a bottle shoulder downward extension 501, an upward vertical line segment is a bottle shoulder vertical extension 502, and the bottle shoulder extension 501 and the bottle shoulder vertical extension 502 meet at a junction of the bottle shoulder and the bottle mouth; the intersection angle of the shoulder extension 501 and the shoulder extension 502 is greater than 90 °.
The light emitting plate 20 is in the shape of an inverted trapezoidal cone, the light source is in the shape of a cone and emits light outwards, and the downward long line of the light emitting plate 20 passes through the intersection point of the downward extension line 501 of the bottle shoulder and the vertical extension line 502 of the bottle shoulder. The downward long line of the light emitting panel 20 is perpendicular to the intersection of the bottle shoulder vertical extension 502.
The size of the light-transmitting plate 30 is matched with that of the light-emitting plate 20, the light-transmitting plate is in a trapezoidal conical shape and is arranged below the light-emitting plate 20, and the light-transmitting plate 30 is provided with radial black stripes 301; the black part is completely opaque and the other part is transparent; the transmitted light can project vertical lines with alternate light and shade on the surface of the glass bottle shoulder.
The camera 10 is installed on the top of the vertical extension line 502 of the bottle shoulder and coincides with the central axis of the glass bottle, and the camera 10 is used for photographing the water ripple of the glass bottle shoulder.
Referring to fig. 6, the light-emitting plate 20 is a light-transmitting plate with radial stripes, and is a tapered black plate, and is hollowed out with gaps to form a grating; the black parts are completely opaque and the rest are transparent. Thus, light and dark vertical lines are projected on the surface of the glass bottle shoulder. If the radiation stripes are skewed, spiral interval stripes are projected on the bottle shoulder.
Referring to fig. 6 and 7, the light emitting panel 20 has an inverted trapezoidal shape, and the light source emits light outward in a tapered shape.
Principle explanation of the technology: 1. the detection of the slope is required and, due to the uneven surface, the reflection is very large if the light is directed directly. A light emitting plate with a vertical detection slope will leave a uniform illumination on the detection slope (see fig. 7).
Indicating that the light emitting panel 20, if a base plate is placed underneath, will have a light projection. Just like a computer screen is projected on a keyboard, the keyboard is soft without any strong reflection.
2. The reason why the light emitting plate is formed in an inverted cone shape is that the light emitting plate has a small light emitting area (top of the inverted cone) and an excessively small irradiation angle (small incident angle, indicated by a dotted arrow) at the end near the inclined surface, but does not appear excessively bright (see fig. 8). Since the light emitting panel is in the shape of an inverted cone, the inclined surface far end 402 is far away from the light emitting panel (farthest), but has a large light emitting area (lower part of the inverted cone) and an illumination angle of 45 degrees (a medium incident angle, indicated by a dashed arrow), but does not appear too dark, as shown in fig. 8.
Therefore, the inclined plane of perpendicular luminescent plate, light do not have the too bright risk of dark excessively, not only can realize that the surface illumination is soft. And because the light is direct light, no diffuse light is reflected. If the inclined plane is slightly uneven, the light can be softly irradiated on the whole and can be clearly distinguished on the local part. For example, the inclined surface has small holes, so that the small holes can easily cast shadows.
And this time has radial grating, can make the light form more even irradiation and parallel irradiation again at the inclined plane after permeating the grating. Parallel illumination means that illumination is isolated or passed by the grating, more forming parallel light. The uniform irradiation means that the transparent parallel light irradiates on the water ripple part, and because diffraction and reflection occur, bright spots can be generated on the black part, so that multiple strands of disordered stripes can appear on the original black and white clear light columns.
If the stripes are more disordered, the inclined plane has water ripples; if some part of the stripe is disordered and other parts are normal, the inclined plane is indicated to have point-shaped bulges or pits; if the stripes are very normal, the inclined plane is very smooth; if the slope lines are normal but the interface is fuzzy, the slope is generally rough.
In the first embodiment, referring to fig. 9, the portion of the image with uneven brightness captured by the camera 1 is regarded as the bottle shoulder water wave 2 with uneven surface.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modifications, equivalents and improvements made by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. The utility model provides a shoulder surface ripple detection method based on cone, includes a camera and a cone of taking the shoulder, the camera is arranged in directly over the cone center pin, be equipped with a luminescent plate between camera and the cone, its characterized in that, the luminescent plate lower part still is equipped with a light-passing board, light-passing board and luminescent plate constitute the trapezoidal face cone that two are big, the centre is little jointly, and two trapezoidal face conical center pins coincidence is in the camera center pin, be equipped with the equidirectional on the light-passing board, be radial black stripe, the camera is shot the cone in real time and is detected and upload computer terminal, when the discovery has bottle shoulder ripple, judges as non-genuine.
2. The assay of claim 1 wherein the computer stores a certified product as a standard profile;
if the detection map is completely consistent with the standard map, the standard map is represented as a genuine product;
or judging the grade of the cone to be detected according to the number of the bottle shoulder water ripples of the detection map compared with the standard map.
3. The detecting method according to claim 1, wherein the light emitting plate is a single-sided ring-shaped light source, and emits light uniformly only to the outside.
4. The inspection method of claim 1, wherein the light emitting panel is extended perpendicularly to the surface of the cone to be inspected.
5. The detection method according to claim 1, wherein the light-transmitting width of the light-transmitting plate is consistent from top to bottom.
6. The detection method according to claim 1, wherein the transparent plate has 50 to 100 black stripes.
7. The detecting method according to claim 1, wherein an included angle between the two surfaces of the light-transmitting plate and the light-emitting plate is an obtuse angle, and the included angle is adjustable.
8. The assay of any one of claims 1-6 wherein the cone is a shouldered vial.
9. The detection method according to any one of claims 1 to 7, wherein the detection is applicable to industrial flow line on-line production detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210708069.4A CN115165921A (en) | 2022-06-21 | 2022-06-21 | Detection method of shoulder surface water ripple based on cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210708069.4A CN115165921A (en) | 2022-06-21 | 2022-06-21 | Detection method of shoulder surface water ripple based on cone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115165921A true CN115165921A (en) | 2022-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210708069.4A Withdrawn CN115165921A (en) | 2022-06-21 | 2022-06-21 | Detection method of shoulder surface water ripple based on cone |
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| Country | Link |
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| CN (1) | CN115165921A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116703900A (en) * | 2023-08-03 | 2023-09-05 | 山东明佳科技有限公司 | Image detection method, system, equipment and storage medium for bottle mouth crack of milk glass bottle |
-
2022
- 2022-06-21 CN CN202210708069.4A patent/CN115165921A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116703900A (en) * | 2023-08-03 | 2023-09-05 | 山东明佳科技有限公司 | Image detection method, system, equipment and storage medium for bottle mouth crack of milk glass bottle |
| CN116703900B (en) * | 2023-08-03 | 2023-10-20 | 山东明佳科技有限公司 | Image detection method, system, equipment and storage medium for bottle mouth crack of milk glass bottle |
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Application publication date: 20221011 |