CN110455809A - A kind of machine vision detection device and method of rod surface defect - Google Patents
A kind of machine vision detection device and method of rod surface defect Download PDFInfo
- Publication number
- CN110455809A CN110455809A CN201910749827.5A CN201910749827A CN110455809A CN 110455809 A CN110455809 A CN 110455809A CN 201910749827 A CN201910749827 A CN 201910749827A CN 110455809 A CN110455809 A CN 110455809A
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- detection
- connecting rod
- light source
- rod surface
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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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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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
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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- Computer Vision & Pattern Recognition (AREA)
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- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
A kind of machine vision detection device of rod surface defect, including detection support, Clamping Apparatus of Connecting Rod and detection platform；Clamping Apparatus of Connecting Rod is located in detection platform, and detection support is located at the top of detection platform；Detection support is equipped with detection components, the detection components include slave computer, computer and the light source being fixed in detection support, left camera and right camera, light source is fixed on the surface in detection support and being located at Clamping Apparatus of Connecting Rod, left camera and right camera are located at the two sides of light source, and the central axes of the central axes and light source of left camera and right camera are in angle of 45 degrees, left camera, right camera and slave computer are respectively with calculating mechatronics, and light source is by light source controller and the next mechatronics.The present invention is able to achieve detects rod surface quality automatically, and can obtain the size and location information of rod surface defect, improves the detection efficiency of connecting rod.
Description
Technical field
The present invention relates to technical field of vision detection, and in particular to a kind of machine vision detection device of rod surface defect
And method.
Background technique
Machine vision is the system for making machine have visual perception function, and research is the dedicated vision system of background with application
System is only provided to the relevant scene description of a certain particular task of execution.Machine vision can obtain environment by visual sensor
Two dimensional image, and analyzed and explained by vision processor, and then be converted to symbol, allow robot that can recognize object
Body obtains the data information of object, finally exports mechanically actuated instruction.Now, it can solve industrially with machine vision technique
Automatic identification problem will not cause the surface of object to be detected in addition, vision-based detection is typical non-contact detecting mode
Any injury.Also just because of these advantages outstanding, so that visible detection method and vision detection system obtain in the industrial production
It obtained and was widely applied, and bore the vital tasks such as field data feedback, defects detection.
Especially for auto industry field, auto industry has been realized in increasingly automated, and vision detection technology is in vapour
Using the degree of automation and productivity effect that can be further improved auto industry on vehicle industrial circle, but in auto industry also
It is not directed to the vision detection technology of automobile connecting bar, is especially developed not yet for some relatively new rod surface quality
Detection technique, and now to the detection mode of these relatively new connecting rods mainly pass through artificial detection, it is low that there are detection efficiencies
The problems such as high with error rate.
Summary of the invention
Present invention aims to overcome that the shortcomings that prior art and deficiency, provide a kind of machine view of rod surface defect
Feel detection device, is able to achieve and rod surface quality is detected automatically, improve the detection efficiency of connecting rod.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of machine vision detection device of rod surface defect, including detection support, Clamping Apparatus of Connecting Rod and detection platform；Even
Rod chucking appliance is located in detection platform, and detection support is located at the top of detection platform；Detection support is equipped with detection components, the inspection
Surveying component includes slave computer, computer and the light source being fixed in detection support, left camera and right camera, and light source is fixed on inspection
The surface of Clamping Apparatus of Connecting Rod is surveyed on bracket and is located at, left camera and right camera are located at the two sides of light source, and left camera and the right side
The central axes of camera and the central axes of light source in angle of 45 degrees, Zuo Xiangji, right camera and slave computer respectively with calculate mechatronics,
Light source is by light source controller and the next mechatronics.
From the foregoing, it will be observed that connecting rod is in process, rod surface is because of operation or machine problem, it may appear that notch or scratch,
Exist situations such as too shallowly either cracking face is asymmetric in splitter, cracks or occur scaling-off situation, will cause installing and using
Quality problems, it is therefore necessary to after the completion of Machining of Connecting Rod, connecting rod be detected.After the completion of Machining of Connecting Rod, connecting rod is fixed
In Clamping Apparatus of Connecting Rod, by light source polishing, the focusing of left camera and right camera lens, left camera and right camera shoot link diagram
Picture, then connecting rod image is sent to computer by left camera and right camera, and computer obtains the grayscale information of connecting rod image, then
Connecting rod image is filtered, the defect of rod surface is then identified using threshold process, finally passes through operator operation
Rod surface defect size is obtained, to obtain the location information of defect.
Rod surface quality is detected automatically in conclusion the present invention is able to achieve, and rod surface defect can be obtained
Size and location information, improve the detection efficiency of connecting rod.
As an improvement of the present invention, the slave computer is single-chip microcontroller or PLC.
The present invention also provides a kind of machine vision detection methods of rod surface defect.
A kind of machine vision detection method of rod surface defect, comprising the following steps:
Connecting rod image is shot using left camera and right camera；
Obtain the grayscale information of connecting rod image；
Then connecting rod image is filtered；
Then the defect of rod surface is identified using threshold process；
Rod surface defect size finally is obtained by operator operation, to obtain the location information of defect.
Compared with prior art, the invention has the following advantages that
The present invention is able to achieve detects rod surface quality automatically, and can obtain rod surface defect size and
Location information improves the detection efficiency of connecting rod.
Detailed description of the invention
Fig. 1 is the schematic diagram of the machine vision detection device of rod surface defect of the present invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.It is understood that tool described herein
Body embodiment is used only for explaining the present invention rather than limiting the invention.It also should be noted that for the ease of retouching
It states, only some but not all contents related to the present invention are shown in the drawings.
Embodiment 1
Referring to FIG. 1, a kind of machine vision detection device of rod surface defect, including detection support 30, Clamping Apparatus of Connecting Rod
20 and detection platform 10；
Clamping Apparatus of Connecting Rod 20 is located in detection platform 10, and detection support 30 is located at the top of detection platform 30；
Detection support 30 is equipped with detection components, and the detection components include slave computer 80, computer 70 and are fixed on
Light source 40, Zuo Xiangji 50 and right camera 60 in detection support 30, light source 40 are fixed in detection support 30 and are located at connecting rod and press from both sides
The surface of tool 20, Zuo Xiangji 50 and right camera 60 are located at the two sides of light source 40, and in left camera 50 and right camera 60
In angle of 45 degrees, Zuo Xiangji 50, right camera 60 and slave computer 80 are electrically connected with computer 70 respectively for the central axes of axis and light source 40
It connects, light source 40 is electrically connected by light source controller 90 with slave computer 80.
From the foregoing, it will be observed that connecting rod is in process, rod surface is because of operation or machine problem, it may appear that notch or scratch,
Exist situations such as too shallowly either cracking face is asymmetric in splitter, cracks or occur scaling-off situation, will cause installing and using
Quality problems, it is therefore necessary to after the completion of Machining of Connecting Rod, connecting rod be detected.After the completion of Machining of Connecting Rod, connecting rod is fixed
In Clamping Apparatus of Connecting Rod, by light source polishing, the focusing of left camera and right camera lens, left camera and right camera shoot link diagram
Picture, then connecting rod image is sent to computer by left camera and right camera, and computer obtains the grayscale information of connecting rod image, then
Connecting rod image is filtered, the defect of rod surface is then identified using threshold process, finally passes through operator operation
Rod surface defect size is obtained, to obtain the location information of defect.
Rod surface quality is detected automatically in conclusion the present invention is able to achieve, and rod surface defect can be obtained
Size and location information, improve the detection efficiency of connecting rod.
In the present embodiment, the slave computer 80 is single-chip microcontroller or PLC.
A kind of machine vision detection method of the rod surface defect using above-mentioned apparatus, comprising the following steps:
Connecting rod image is shot using left camera and right camera；
Obtain the grayscale information of connecting rod image；
Then connecting rod image is filtered；
Then the defect of rod surface is identified using threshold process；
Rod surface defect size finally is obtained by operator operation, to obtain the location information of defect.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (3)
1. a kind of machine vision detection device of rod surface defect, it is characterised in that: including detection support, Clamping Apparatus of Connecting Rod and inspection
Survey platform；Clamping Apparatus of Connecting Rod is located in detection platform, and detection support is located at the top of detection platform；Detection support is equipped with detection group
Part, the detection components include slave computer, computer and the light source being fixed in detection support, left camera and right camera, light
Source is fixed on the surface in detection support and being located at Clamping Apparatus of Connecting Rod, and left camera and right camera are located at the two sides of light source, and
The central axes of the central axes and light source of left camera and right camera in angle of 45 degrees, Zuo Xiangji, right camera and slave computer respectively with meter
Mechatronics are calculated, light source is by light source controller and the next mechatronics.
2. the machine vision detection device of rod surface defect according to claim 1, it is characterised in that: the slave computer
For single-chip microcontroller or PLC.
3. a kind of machine vision detection method of the rod surface defect based on device as claimed in claim 1 or 2, it is characterised in that
The following steps are included:
Connecting rod image is shot using left camera and right camera；
Obtain the grayscale information of connecting rod image；
Then connecting rod image is filtered；
Then the defect of rod surface is identified using threshold process；
Rod surface defect size finally is obtained by operator operation, to obtain the location information of defect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910749827.5A CN110455809A (en) | 2019-08-14 | 2019-08-14 | A kind of machine vision detection device and method of rod surface defect |
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| CN201910749827.5A CN110455809A (en) | 2019-08-14 | 2019-08-14 | A kind of machine vision detection device and method of rod surface defect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116106316A (en) * | 2023-01-30 | 2023-05-12 | 东莞市腾信精密仪器有限公司 | Stainless steel part surface defect detection device |
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| CN102967888A (en) * | 2012-12-15 | 2013-03-13 | 吉林大学 | System for detecting fracture splitting notch of connecting rod of automobile based on machine vision |
| CN102967265A (en) * | 2012-12-15 | 2013-03-13 | 吉林大学 | Method for detecting fracture splitting notch of connecting rod of automobile based on machine vision |
| CN106204614A (en) * | 2016-07-21 | 2016-12-07 | 湘潭大学 | A kind of workpiece appearance defects detection method based on machine vision |
| CN106990113A (en) * | 2017-03-24 | 2017-07-28 | 广东工业大学 | Automobile connecting bar blank is swollen cross section quality vision inspection apparatus |
| CN107064170A (en) * | 2017-04-11 | 2017-08-18 | 深圳市深视智能科技有限公司 | One kind detection phone housing profile tolerance defect method |
| CN107607539A (en) * | 2017-07-25 | 2018-01-19 | 广东工业大学 | A kind of connecting rod is swollen cross section quality vision inspection apparatus and detection method |
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2019
- 2019-08-14 CN CN201910749827.5A patent/CN110455809A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102590218A (en) * | 2012-01-16 | 2012-07-18 | 安徽中科智能高技术有限责任公司 | Device and method for detecting micro defects on bright and clean surface of metal part based on machine vision |
| CN102967888A (en) * | 2012-12-15 | 2013-03-13 | 吉林大学 | System for detecting fracture splitting notch of connecting rod of automobile based on machine vision |
| CN102967265A (en) * | 2012-12-15 | 2013-03-13 | 吉林大学 | Method for detecting fracture splitting notch of connecting rod of automobile based on machine vision |
| CN106204614A (en) * | 2016-07-21 | 2016-12-07 | 湘潭大学 | A kind of workpiece appearance defects detection method based on machine vision |
| CN106990113A (en) * | 2017-03-24 | 2017-07-28 | 广东工业大学 | Automobile connecting bar blank is swollen cross section quality vision inspection apparatus |
| CN107064170A (en) * | 2017-04-11 | 2017-08-18 | 深圳市深视智能科技有限公司 | One kind detection phone housing profile tolerance defect method |
| CN107607539A (en) * | 2017-07-25 | 2018-01-19 | 广东工业大学 | A kind of connecting rod is swollen cross section quality vision inspection apparatus and detection method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116106316A (en) * | 2023-01-30 | 2023-05-12 | 东莞市腾信精密仪器有限公司 | Stainless steel part surface defect detection device |
| CN116106316B (en) * | 2023-01-30 | 2024-06-18 | 东莞市腾信精密仪器有限公司 | Stainless steel part surface defect detection device |
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