CN203337105U - Device for measuring internal and external diameters of transparent glass bottleneck based on machine vision - Google Patents
Device for measuring internal and external diameters of transparent glass bottleneck based on machine vision Download PDFInfo
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- CN203337105U CN203337105U CN2013202998600U CN201320299860U CN203337105U CN 203337105 U CN203337105 U CN 203337105U CN 2013202998600 U CN2013202998600 U CN 2013202998600U CN 201320299860 U CN201320299860 U CN 201320299860U CN 203337105 U CN203337105 U CN 203337105U
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Abstract
The utility model discloses a device for measuring internal and external diameters of a transparent glass bottleneck based on machine vision. A device instrument support comprises a support pipe arranged on a support base. A camera frame and a light source frame are arranged on a support pipe. A fixed distance is arranged between the camera frame and the light source frame. A light source direction is fixed on the light source frame upwards. A black baffle is fixed above the light source. The camera and the lens of an image acquisition unit are fixed on a tripod. A computer and the camera are connected through a data transmission line. A black background plate is arranged on the support base. The device instrument support, the light source, related accessories and the image acquisition unit are all arranged in a dark camera obscura. The light source is in the form of a white ring-shaped LED (light-emitting diode) light source of which the luminance can be adjusted. A fixed angle is formed between an LED lamp bead and a vertical direction. The black baffle is arranged on the surface of the light source. A glass bottle is freely suspended above the baffle through a black elastic pad matched with the glass bottleneck.
Description
Technical field
The present invention relates to field of machine vision, particularly relate to a kind of clear glass bottleneck internal-and external diameter measurement mechanism and method based on machine vision.
Background technology
Current domestic vial is when manufacturing, and due to the restriction of existing technology level and equipment, the internal-and external diameter of bottleneck has certain deviation, and especially inner diameter deviation, can not well meet the requirement that bottle is used enterprise sometimes.The user is when using the underproof vial filling liquid of internal-and external diameter, because bottleneck internal-and external diameter deviation surpasses certain limit, can make to produce gap between bottle stopper and bottleneck, thereby cause that bottleneck and bottle stopper are airtight does not sternly make liquid in vial spill, especially those rely on the vial of bottleneck inner wall sealing, as filling vinegar, soy sauce, the bottle of edible wet goods, synthetic as a whole at filling rear bottle stopper and hackamore knot, even still retain in use bottle cap, only remove draw ring in bottle cap, this has just proposed very high accuracy requirement to internal diameter and the circularity of bottle, otherwise liquid can be from the binding site leakage pollution body of bottle stopper and bottle, affect product quality and outward appearance is clean and tidy, cause waste.
Vial uses enterprise, generally purchased bottle is inspected by random samples, to judge whether to meet filling requirement.Main dependence manually adopts vernier caliper to detect the glass bottle opening internal-and external diameter at present.Can be subject to the interference of the factors such as health, surrounding environment due to the people, and long-time plodding detection easily produces visual fatigue and physical fatigue, its subjectivity is larger, easily causes and detects error and misread data.
Along with the development of machine vision, increasing quality inspection project replaces traditional manual detection by machine vision, and this can not only overcome the impact of people's subjective factor, can also improve efficiency and the accuracy of detection.Machine vision refers to passes through vision sensor, as CCD, CMOS etc., the target that will be taken converts picture signal to, and image processing system carries out various computings to these image informations and obtains target signature, finally according to the result of differentiating, controls on-the-spot device action.Machine vision, as a kind of important detection means, has been widely used in the fields such as detection and measurement.
The detection of machine vision to vial at present, most bottle for relying on the bottleneck butt-end packing, as beer bottle, is seldom detected for the Clear glass bottles and jars that rely on the bottleneck inner wall sealing.Due to the equal reason of bottle color, diameter, material and bottleneck structure, be applicable to the device that beer bottle detects the detection that is not suitable for heavy caliber, Clear glass bottles and jars.The bottleneck plate defects only detects need obtain the plate defects image, and without obtaining bottleneck internal-and external diameter edge accurately, and the research that bottleneck size is detected is mainly also that external diameter is detected.Not yet retrieve at present the report that utilizes Machine Vision Detection heavy caliber, Clear glass bottles and jars internal diameter, and this respect research has its very important practical significance, therefore exploitation seems particularly important for the detection technique of heavy caliber, Clear glass bottles and jars inside/outside diameter size.
Through retrieval, the document of relevant glass bottle opening context of detection is as follows: the articles such as Master's thesis " the beer bottle bottleneck based on image and the bottle stained automatic detection in the end ", Master's thesis " research of the beer bottle bottleneck detection system based on machine vision " and Master's thesis " the beer bottle bottleneck detection system research based on machine vision ", its common ground is while obtaining beer bottle bottleneck image, adopt reflective lighting system, be about to light source and be placed in the bottleneck top, camera gathers the bottleneck image from the bottleneck top.Find by test, from top polishing, obtain the bottleneck image, can obtain bottleneck end view drawing picture clearly, but the internal-and external diameter of bottle unintelligible, edge fog, the reflective highlight regions of bottleneck is not the real internal-and external diameter of bottleneck.Bottle mouth defect can be better judged by this image acquisition mode, but real bottleneck inside/outside diameter size can't be obtained.
In machine vision, light source is important ingredient, and good polishing mode can obtain high quality graphic, obtains exactly desired data, reduces the step that later image is processed, and improves speed and the accuracy processed.So can the polishing mode of light source and the putting position of light source, be make the bottleneck outer edge clear, accurately records the key of bottleneck internal-and external diameter.
Summary of the invention
Deficiency in view of prior art exists, the invention provides a kind of clear glass bottleneck internal-and external diameter measurement mechanism and method based on machine vision.The object of the invention is to provide a kind of heavy caliber, clear glass bottleneck measurement mechanism, can the clear internal-and external diameter data of obtaining the bottleneck outer edge and obtaining bottleneck.This device can be inspected by random samples purchased bottle for the enterprise of vial filling liquid product, also can be for other purposes.
The hardware unit of glass bottle opening pick-up unit measurement mechanism of the present invention: instrument support, light source and related accessories, image collecting device, instrument support comprises the stand tube be arranged on above bracket base, camera frame and light source shelf are installed on stand tube, and the black baffle plate is fixed on the light source top; Image collecting device camera and camera lens are fixed on camera frame, computing machine and camera link together by data line, be placed with the black background plate on bracket base, instrument support, light source and related accessories, image collecting device all are placed in the black camera bellows, and light source direction is fixed on light source shelf upward; There is one deck black baffle plate on the light source surface, in the middle of the black baffle plate, a circular aperture is arranged, its diameter, than bottleneck slightly larger in diameter, makes glass bottle opening pass the baffle plate aperture, and the vial position limitation is prevented to double swerve in this aperture, the bottleneck lip that passes baffle plate is connected with soft black elastomeric pad.
2 light sources and related accessories: light source is LED light source, can be annular light source, light source colour is white, and brightness adjusting as required, every LED lamp pearl and vertical direction have a fixed angle, there is one deck black baffle plate on the annular light source surface, prevent the light direct projection that makes progress, a circular aperture is arranged in the middle of the black baffle plate, its diameter is than bottleneck slightly larger in diameter, make glass bottle opening can pass freely through the baffle plate aperture, and the vial position limitation is prevented to double swerve in this aperture, bottleneck lip through baffle plate is connected with soft black elastomeric pad, vial is suspended on baffle plate, in a kind of free state.
3 image collecting devices: for obtaining the glass bottle opening image.Be arranged on camera frame and be screwed camera and camera lens.
4 computer systems: by the software of independent development, obtained glass bottle opening image is carried out to respective handling, export corresponding testing result.
Software systems mainly comprise: the contents such as image acquisition, image processing, data demonstration, preservation as a result.
1, image acquisition: by the software control USB interface, can carry out Real-time Collection to image.
2, image is processed: obtained image is carried out to relevant treatment, and extract glass bottle opening internal-and external diameter edge.
3, data show: glass bottle opening internal-and external diameter data result shows jointly with figure and form, as maximal value, minimum value margin tolerance and the circularities thereof of bottleneck internal-and external diameter mean diameter value, internal-and external diameter.
4, result is preserved: both can preserve obtained image, and also can preserve the data result after having detected.
In clear glass bottleneck internal-and external diameter measurement mechanism, once through demarcating, the distance between camera frame and light source shelf keeps immobilizing, and the position of camera and light source remains unchanged, to guarantee the repeatability of measurement result.
All be placed in the black camera bellows at clear glass bottleneck internal-and external diameter measurement mechanism Instrumental support, light source and related accessories, image collecting device, avoid the interference of external environment light, guarantee the stability of image acquisition.
The LED annular light source that light source is brightness-adjustable in clear glass bottleneck internal-and external diameter measurement mechanism, light source colour is white.When detecting bottleneck, the way in the polishing mode document different from the past of light source.Light source of the present invention be placed in vial the bottle upper end concordant with the bottleneck lip.The polishing direction of light source is inwardly upwards, and a fixed angle is arranged, and light beam concentrates brightness high, and good uniformity adopts the method to obtain bottleneck picture quality the best, can obtain bottleneck internal-and external diameter image clearly.The method is to utilize light to reflect on glass material and the principle of transmission, makes the glass bottle opening edge become highlight regions, and then obtains edge contour image clearly.The black baffle plate on light source surface and can stop light direct projection camera with the supporting black pad of glass bottle opening.The bottleneck image according to said method obtained is the annulus that there are one fixed width and brightness in bottleneck internal-and external diameter edge, can bottleneck internal-and external diameter and background on every side clearly be distinguished than being easier to, and simplify the later image processing procedure.If the polishing mode of light source is upper polishing, image shows is mainly the make progress end face of reflecting part of bottleneck, is not the bottleneck internal-and external diameter, and a bottle end also can affect edge extracting to the reflective of light source.Under light source, the putting position of polishing is also very important, the improper extraction that also can affect bottleneck internal-and external diameter edge in position.
Beneficial effect of the present invention:
1, be placed with the background board of black on bracket base, prevent reflective;
2, light source be placed in vial the bottle upper end concordant with the bottleneck lip;
3, the LED annular light source that light source is brightness-adjustable, and the light emission direction of LED annular light source has certain angle, and light beam concentrates brightness high, good uniformity;
4, polishing mode is lower polishing, and the polishing direction is inwardly upwards, utilizes light to reflect on glass material and the transmission principle, makes the glass bottle opening edge become highlight regions, and then obtains edge contour image more clearly;
5, be added with the annular black elastomeric pad supporting with glass bottle opening at bottle mouth position, in order to eliminate the impact of vial below as body or other projection;
6, utilize the vial self gravitation that it is hung on the black baffle plate above light source, in a kind of free state;
7, the black baffle plate on light source surface and can stop light direct projection camera with the supporting black elastomeric pad of glass bottle opening;
8, in clear glass bottleneck internal-and external diameter measurement mechanism, once through demarcating, the distance between camera frame and light source shelf keeps immobilizing, and the position of camera and light source remains unchanged, to guarantee the repeatability of measurement result;
9, all be placed in the black camera bellows at clear glass bottleneck internal-and external diameter measurement mechanism Instrumental support, light source and related accessories, image collecting device, avoid the interference of external environment light, guarantee the stability of image acquisition;
10, this installation cost is low, easy to use, and accuracy of detection<20um has effectively solved the clear problem of obtaining heavy caliber, Clear glass bottles and jars bottleneck internal-and external diameter edge, and easily applied;
11, with manual detection, compare, result is more objective, both can liberate the labour, the people is broken away from and repeat dull simple work, can get rid of again people's interference caused by subjective factors, avoids the error produced due to tired.
The accompanying drawing explanation
A kind of clear glass bottleneck internal-and external diameter measurement mechanism schematic diagram based on machine vision of Fig. 1;
Fig. 2 polishing mode partial schematic diagram;
Number in the figure title: 1, bracket base; 2, stand tube; 3, camera frame; 4, light source shelf; 5, light source; 6, camera; 7, camera lens; 8, computing machine; 9, data line; 10, black background plate; 11, black camera bellows; 12, black elastomeric pad; 13, black baffle plate; 14, vial.
Embodiment
As shown in Figure 1, this measurement mechanism is comprised of two parts a kind of clear glass bottleneck internal-and external diameter measurement mechanism based on machine vision of the present invention: hardware unit and software systems.It is characterized in that hardware unit is comprised of 4 modules: instrument support, light source and related accessories, image collecting device, computer system.
Instrument support comprises the stand tube 2 be arranged on above bracket base 1, and camera frame 3 and light source shelf 4 are installed on stand tube, between camera frame and light source shelf, is wherein the fixed size distance; Light source 5 is directed upwardly and is fixed on light source shelf, and black baffle plate 13 is fixed on the light source top; Image collecting device camera 6 and camera lens 7 are fixed on camera frame, computing machine 8 and camera 6 link together by data line 9, be placed with black background plate 10 on bracket base 1, wherein instrument support, light source and related accessories, image collecting device all are placed in black camera bellows 11.
It between camera frame and light source shelf, is the fixed size distance; Camera frame can be according to bottleneck size up-down adjustment.Light source is brightness-adjustable, white, annular, LED light source.LED lamp pearl and vertical direction have a fixed angle.Light source be placed in vial the bottle upper end concordant with the bottleneck lip.The polishing direction of light source is inwardly upwards, be added with the black baffle plate on the light source surface, by with the supporting black elastomeric pad 12 of glass bottle opening by the vial free suspension on baffle plate, utilize light to reflect on glass material and the principle of transmission, make the glass bottle opening edge become highlight regions, and then obtain edge contour image more clearly.Wherein polishing mode partial schematic diagram of the present invention as shown in Figure 2.
Distance in this measurement mechanism between camera frame and light source shelf keeps immobilizing, and the position of camera and light source remains unchanged, to guarantee the repeatability of measurement result.Be added with the black baffle plate on the light source surface, the circular hole of suitable dimension size is arranged in the middle of baffle plate; Be placed with the black background plate on bracket base, the interference of other contextual factors while taking to reduce.Instrument support, light source and related accessories, image collecting device all are placed in the black camera bellows, avoid the interference of external environment light, guarantee the stability of image.
Software systems mainly comprise: the contents such as image acquisition, image processing, data demonstration, preservation as a result.
What in above demonstration and instructions, describe is principle of the present invention and principal character and advantage of the present invention; the technician of the industry should understand; the present invention is not restricted to the described embodiments; what in above-described embodiment and instructions, describe is principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. the clear glass bottleneck internal-and external diameter measurement mechanism of a machine vision, the hardware unit that it is characterized in that measurement mechanism comprises instrument support, light source and related accessories, image collecting device, instrument support comprises the stand tube (2) be arranged on above bracket base (1), camera frame (3) and light source shelf (4) are installed on stand tube, and black baffle plate (13) is fixed on the light source top; Image collecting device camera (6) and camera lens (7) are fixed on camera frame, computing machine (8) and camera (6) link together by data line (9), be placed with black background plate (10) on bracket base (1), instrument support, light source and related accessories, image collecting device all are placed in black camera bellows (11), and light source (5) is directed upwardly and is fixed on light source shelf; There is one deck black baffle plate on the light source surface, in the middle of the black baffle plate, a circular aperture is arranged, its diameter, than bottleneck slightly larger in diameter, makes glass bottle opening pass the baffle plate aperture, and the vial position limitation is prevented to double swerve in this aperture, the bottleneck lip that passes baffle plate is connected with soft black elastomeric pad.
2. the clear glass bottleneck internal-and external diameter measurement mechanism of machine vision according to claim 1, is characterized in that, between camera frame and light source shelf, is the fixed size distance.
3. the clear glass bottleneck internal-and external diameter measurement mechanism of machine vision according to claim 1 and 2, is characterized in that, camera frame can be according to bottleneck size up-down adjustment.
4. the clear glass bottleneck internal-and external diameter measurement mechanism of machine vision according to claim 1 and 2, is characterized in that, light source is brightness-adjustable, white light source.
5. the clear glass bottleneck internal-and external diameter measurement mechanism of machine vision according to claim 1 and 2, is characterized in that, light source is LED light source.
6. the clear glass bottleneck internal-and external diameter measurement mechanism of machine vision according to claim 1 and 2, is characterized in that, light source is annular light source.
7. the clear glass bottleneck internal-and external diameter measurement mechanism of machine vision according to claim 6, is characterized in that, LED lamp pearl and vertical direction have a fixed angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013202998600U CN203337105U (en) | 2013-05-28 | 2013-05-28 | Device for measuring internal and external diameters of transparent glass bottleneck based on machine vision |
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| CN2013202998600U CN203337105U (en) | 2013-05-28 | 2013-05-28 | Device for measuring internal and external diameters of transparent glass bottleneck based on machine vision |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673931A (en) * | 2013-12-02 | 2014-03-26 | 北京农业信息技术研究中心 | Method, device and system for measuring angle of rice flag leaf |
| CN105115433A (en) * | 2015-08-10 | 2015-12-02 | 苏州听毅华自动化设备有限公司 | Workpiece automation detection device |
| CN105588517A (en) * | 2016-02-26 | 2016-05-18 | 浙江工业大学 | Flange diameter measuring device based on machine vision |
| CN107102009A (en) * | 2017-05-04 | 2017-08-29 | 武汉理工大学 | A kind of method of the cylinder spool quality testing based on machine vision |
| CN110608686A (en) * | 2019-10-31 | 2019-12-24 | 大连理工大学 | Visual measurement method and device for part with chamfer |
-
2013
- 2013-05-28 CN CN2013202998600U patent/CN203337105U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673931A (en) * | 2013-12-02 | 2014-03-26 | 北京农业信息技术研究中心 | Method, device and system for measuring angle of rice flag leaf |
| CN103673931B (en) * | 2013-12-02 | 2016-06-08 | 北京农业信息技术研究中心 | A kind of method, Apparatus and system measuring angle of rice flag leaf |
| CN105115433A (en) * | 2015-08-10 | 2015-12-02 | 苏州听毅华自动化设备有限公司 | Workpiece automation detection device |
| CN105588517A (en) * | 2016-02-26 | 2016-05-18 | 浙江工业大学 | Flange diameter measuring device based on machine vision |
| CN107102009A (en) * | 2017-05-04 | 2017-08-29 | 武汉理工大学 | A kind of method of the cylinder spool quality testing based on machine vision |
| CN110608686A (en) * | 2019-10-31 | 2019-12-24 | 大连理工大学 | Visual measurement method and device for part with chamfer |
| CN110608686B (en) * | 2019-10-31 | 2021-03-26 | 大连理工大学 | Visual measurement method and device for part with chamfer |
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