CN108362327A - A kind of annular solid interior wall construction visible detection method - Google Patents
A kind of annular solid interior wall construction visible detection method Download PDFInfo
- Publication number
- CN108362327A CN108362327A CN201810032249.9A CN201810032249A CN108362327A CN 108362327 A CN108362327 A CN 108362327A CN 201810032249 A CN201810032249 A CN 201810032249A CN 108362327 A CN108362327 A CN 108362327A
- Authority
- CN
- China
- Prior art keywords
- wall
- annular solid
- camera
- interior wall
- wall construction
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Image Analysis (AREA)
Abstract
The present invention relates to a kind of annular solid interior wall construction visible detection methods, used detecting system, including camera, computer and conical reflector, the conical reflector is located at the both sides of annular solid inner wall with camera, and straight-on camera, annular solid inner wall by conical reflector at picture acquired by camera.Detection method is：Inner wall lower boundary and coboundary are positioned by edge extracting and ellipse fitting, it is the corresponding picture position of annular solid inner wall to be located in two boundaries；Polar coordinate system is established according to the picture position recognized, polar diameter and polar angle correspond to the height of wall and azimuth in original annular body respectively；The correspondence between polar diameter and practical inside wall height is obtained by calibration；Annular solid interior wall construction is identified by feature extraction means, and its location information is calculated according to calibration result before；Judge whether the interior wall construction is qualified.
Description
Technical field
The present invention relates to a kind of annular solid interior wall construction vision detection systems.
Background technology
The structured annular solid of inner wall belt is a kind of common machine components, is widely used in such as Planetary Gear Transmission
Many machine driving neighborhoods such as structure.With being continuously increased for its application demand, the epoch for producing assembly in enormous quantities are had been enter into.It is interior
The structured annular solid of cornice often has slide block slot etc. according to its application scenario difference at some inner wall surface positions
Different structures.Situations such as in view of processing leakage sequence or dislocation in high volume production process, can inevitably occur, therefore, right
It before it carries out Automated assembly, generally requires first to be detected key structure, to avoid due to processing leakage sequence or dislocation
Cause mechanical structure to be collided, ultimately causes the badly damaged of mechanical device.
Previous detection is realized often through artificial detection, but artificial detection has following apparent deficiency：
(1) from the point of view of production technology and cost, it is unnecessary that artificial detection can produce assembly introducing to annular solid
Additional link, is unfavorable for the realization of fully-automatic production assembly, while can also increase cost of labor；
(2) from the point of view of production efficiency, artificial detection speed is slower, it is difficult to realize on-line checking；
(3) from the point of view of testing result, artificial detection reliability can not ensure, be readily incorporated human error or mistake
Sentence.
Invention content
In view of the above-mentioned problems, the object of the present invention is to provide a kind of fast and reliable annular solid inner wall detection method, realize
The on-line checking of the interior wall constructions such as internal gear reduces cost to improve production efficiency.To achieve the above object, this hair
It is bright to take following technical scheme：
A kind of annular solid interior wall construction visible detection method, used detecting system include camera and computer, camera
The image of the annular solid inner wall to be measured acquired is transferred into computer, by computer according to image detection annular solid inner wall knot
Structure, which is characterized in that the vision detection system further includes conical reflector, and the conical reflector is located at ring with camera
The both sides of body inner wall, and straight-on camera, annular solid inner wall by conical reflector at picture acquired by camera, detection method
It is as follows：
(1) inner wall lower boundary and coboundary are positioned by edge extracting and ellipse fitting, it is ring to be located in two boundaries
The corresponding picture position of body inner wall；
(2) polar coordinate system is established according to the picture position recognized, polar diameter and polar angle correspond to wall in original annular body respectively
Height and azimuth；
(3) correspondence between polar diameter and practical inside wall height is obtained by calibration；
(4) it identifies annular solid interior wall construction by feature extraction means, and its position letter is calculated according to calibration result before
Breath；
(5) judge whether the interior wall construction is qualified.
The present invention carries out the panoramic imagery of annular solid inner wall by conical reflector, and interior wall construction is imaged to sensor picture
Face, consequently facilitating camera acquires.Meanwhile the imaging region of camera is also extended by this method, so that camera is passed through single
Comprehensive information of the shooting, collecting to entire interior wall construction.It has the following advantages：
(1) method that the present invention is imaged by conical reflector, can be in Overall Acquisition annular solid using single picture
Wall information can realize the reliable detection of high speed；
(2) present invention can expand imaging field of view, can more comprehensively obtain by optimizing conical reflector parameter
Inner wall information；
(3) the configuration of the present invention is simple is, it can be achieved that low cost detection.
Description of the drawings
Fig. 1 is the annular solid interior wall construction detection structure figure that the present invention is previously mentioned.
Fig. 2 is the annular solid interior wall construction detection principle diagram that the present invention is previously mentioned.
Fig. 3 is the annular solid interior wall construction imaging schematic diagram that the present invention is previously mentioned.
Fig. 4 is the image processing flow figure of the present invention.
Figure label explanation：1 camera；2 tested annular solid inner walls；3 conical reflectors；4,5,6 annular solid inner wall typical cases tie
Structure；7 annular solid inner wall lower boundaries；8 annular solid inner wall coboundaries；9 tested inner walls pass through conical reflector imaging；10 is tested
Inner wall is finally in camera imaging；11 imaging sensors；12 camera lenses；13 transparent panels；
Specific implementation mode
The present invention will be described with example below in conjunction with the accompanying drawings.
As shown in Figure 1, the primary structure that annular solid interior wall construction vision detection system provided by the invention needs has camera 1
With conical reflector 3, pass through the relevant informations such as structure 4,5 and 6 on the detectable annular body examination inner wall 2 of this method.Testing principle is such as
Shown in Fig. 2, first, annular solid inner wall 2 is imaged as 9 by conical reflector.By reasonably designing conical reflector, can make
9 are generally aligned in the same plane as far as possible, and straight-on camera.Then, it is adopted by the camera 1 that imaging sensor 11 and camera lens 12 are combined into as 9
Collection is obtained as 10.As shown in Fig. 2, carrying the ring structure of keyway in figure for inner wall, which is placed on transparent panel 13
On, conic mirror peak is less than annular solid minimum point, ensures to interfere when the two translation.As Fig. 3 annular solids inner wall at
As shown in schematic diagram, wherein outer circle corresponds to annular solid inner wall lower boundary 7, and inner circle corresponds to annular solid inner wall coboundary 8, meanwhile, it is interior
Wall typical structure 4,5 and 6 is comprehensively deployed into image.Finally, by Computer real-time processing picture.
Computer Image Processing flow is as shown in Figure 4：The first step positions inner wall by edge extracting and ellipse fitting first
Lower boundary 7 and coboundary 8, it is the corresponding picture position of annular solid inner wall to be located in two boundaries.Complete inner wall position identification
Afterwards, you can coordinate system is established according to the position recognized, to enable image coordinate system preferably to match real-world coordinate system, here
Selection uses polar coordinate system, as shown in figure 3, ρ represents polar diameter, θ represents polar angle, the two correspond to respectively original inner wall height and
Azimuth first can be by simply demarcating to obtain ρ and practical inside wall height to reduce the distortion effects that conical reflector introduces
Accurate correspondence.Second step passes through the feature extractions means identification rings such as binaryzation, edge detection, connected domain detection
Body inner wall keyway and its position, and preliminary screening is carried out according to threshold value.Third walks, the related knot obtained according to second step
Structure location information, the problems such as judging whether keyway leakage sequence or misplace, to judge whether the interior wall construction is qualified.
Claims (1)
1. a kind of annular solid interior wall construction visible detection method, used detecting system includes camera and computer, camera institute
The image of annular solid inner wall to be measured of acquisition is transferred into computer, by computer according to image detection annular solid interior wall construction,
It is characterized in that, the vision detection system further includes conical reflector, the conical reflector is located at annular with camera
The both sides of internal wall, and straight-on camera, annular solid inner wall by conical reflector at picture acquired by camera.Detection method is such as
Under：
(1) inner wall lower boundary and coboundary are positioned by edge extracting and ellipse fitting, it is annular solid to be located in two boundaries
The corresponding picture position of inner wall；
(2) polar coordinate system is established according to the picture position recognized, polar diameter and polar angle correspond to the height of wall in original annular body respectively
Degree and azimuth；
(3) correspondence between polar diameter and practical inside wall height is obtained by calibration；
(4) it identifies annular solid interior wall construction by feature extraction means, and its location information is calculated according to calibration result before；
(5) judge whether the interior wall construction is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810032249.9A CN108362327A (en) | 2018-01-12 | 2018-01-12 | A kind of annular solid interior wall construction visible detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810032249.9A CN108362327A (en) | 2018-01-12 | 2018-01-12 | A kind of annular solid interior wall construction visible detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108362327A true CN108362327A (en) | 2018-08-03 |
Family
ID=63006154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810032249.9A Pending CN108362327A (en) | 2018-01-12 | 2018-01-12 | A kind of annular solid interior wall construction visible detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108362327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426348A (en) * | 2019-09-06 | 2019-11-08 | 二八六视觉科技(佛山)有限责任公司 | A kind of cylinder inner face detection device and its detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2187298Y (en) * | 1993-12-23 | 1995-01-11 | 哈尔滨工业大学 | Ring sighting optical means for inner wall of tube |
| EP1933246A1 (en) * | 2006-12-14 | 2008-06-18 | F.Hoffmann-La Roche Ag | A method for visualising a chronological sequence of measurements |
| CN101949866A (en) * | 2010-09-01 | 2011-01-19 | 厦门大学 | Single camera omni-directional vision sensor for package test |
| CN105092603A (en) * | 2015-09-07 | 2015-11-25 | 哈尔滨理工大学 | Online visual inspection device and method for inner walls of bowl-shaped workpieces |
| CN106323980A (en) * | 2015-06-18 | 2017-01-11 | 武汉科技大学 | Small annular workpiece inner wall panoramic imaging apparatus and method |
| CN106404793A (en) * | 2016-09-06 | 2017-02-15 | 中国科学院自动化研究所 | Method for detecting defects of bearing sealing element based on vision |
-
2018
- 2018-01-12 CN CN201810032249.9A patent/CN108362327A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2187298Y (en) * | 1993-12-23 | 1995-01-11 | 哈尔滨工业大学 | Ring sighting optical means for inner wall of tube |
| EP1933246A1 (en) * | 2006-12-14 | 2008-06-18 | F.Hoffmann-La Roche Ag | A method for visualising a chronological sequence of measurements |
| CN101949866A (en) * | 2010-09-01 | 2011-01-19 | 厦门大学 | Single camera omni-directional vision sensor for package test |
| CN106323980A (en) * | 2015-06-18 | 2017-01-11 | 武汉科技大学 | Small annular workpiece inner wall panoramic imaging apparatus and method |
| CN105092603A (en) * | 2015-09-07 | 2015-11-25 | 哈尔滨理工大学 | Online visual inspection device and method for inner walls of bowl-shaped workpieces |
| CN106404793A (en) * | 2016-09-06 | 2017-02-15 | 中国科学院自动化研究所 | Method for detecting defects of bearing sealing element based on vision |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426348A (en) * | 2019-09-06 | 2019-11-08 | 二八六视觉科技(佛山)有限责任公司 | A kind of cylinder inner face detection device and its detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108226181A (en) | A kind of annular solid interior wall construction vision detection system | |
| CN111047568B (en) | Method and system for detecting and identifying steam leakage defect | |
| GB2569751A (en) | Static infrared thermal image processing-based underground pipe leakage detection method | |
| CN101109716B (en) | Optical detecting method for internal surface of hole | |
| CN106056594A (en) | Double-spectrum-based visible light image extraction system and method | |
| CN109488888B (en) | Metal pipeline leakage monitoring method based on infrared temperature field multivariate analysis | |
| CN102081296A (en) | Device and method for quickly positioning compound-eye vision imitated moving target and synchronously acquiring panoramagram | |
| US20150339819A1 (en) | Method for processing local information | |
| CN104197836A (en) | Vehicle lock assembly size detection method based on machine vision | |
| CN107092905B (en) | Method for positioning instrument to be identified of power inspection robot | |
| CN109657717A (en) | A kind of heterologous image matching method based on multiple dimensioned close packed structure feature extraction | |
| CN108827979A (en) | A kind of module group lens appearance detecting method | |
| MY193817A (en) | Image detection system | |
| CN109034170A (en) | A kind of round readings of pointer type meters method of switch cubicle detection device | |
| CN102879404A (en) | System for automatically detecting medical capsule defects in industrial structure scene | |
| CN209895386U (en) | Image recognition system | |
| CN108362327A (en) | A kind of annular solid interior wall construction visible detection method | |
| CN109003228B (en) | Dark field microscopic large-view-field automatic stitching imaging method | |
| CN104966283A (en) | Imaging layered registering method | |
| CN107643611A (en) | A kind of automatic checkout system of liquid crystal display and backlight assembly precision | |
| CN107833210A (en) | A kind of appearance detecting method and system based on neutral net | |
| KR102642691B1 (en) | apparatus for recognizing measurement value and correcting distortion of instrument panel image and camera | |
| JPH04305144A (en) | Outer circumference chipping inspector for contact lens | |
| KR101797028B1 (en) | Apparatus and method for target detection based infrared and sar(synthetic aperture radar) image | |
| CN203100680U (en) | Circular ring part identifying device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180803 |
|
| RJ01 | Rejection of invention patent application after publication |