CN102519983A - Method for detecting pressing mark of photovoltaic aluminum section on line - Google Patents
Method for detecting pressing mark of photovoltaic aluminum section on line Download PDFInfo
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- CN102519983A CN102519983A CN2011104442252A CN201110444225A CN102519983A CN 102519983 A CN102519983 A CN 102519983A CN 2011104442252 A CN2011104442252 A CN 2011104442252A CN 201110444225 A CN201110444225 A CN 201110444225A CN 102519983 A CN102519983 A CN 102519983A
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- impression
- optoelectronic switch
- section bar
- aluminium section
- video camera
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Abstract
The invention provides a method for detecting the pressing mark of a photovoltaic aluminum section on line. The method comprises the following steps of: arranging a start photoelectric switch, a stop photoelectric switch and a camera on a conveying belt of the aluminum section; and when the aluminum section quickly passes through a monitoring area, sequentially triggering the start photoelectric switch, the stop photoelectric switch and the camera, processing image information acquired by the camera by using an industrial personal computer, and identifying whether the pressing mark exists on a workpiece or not and is qualified or not, so that the aim of detecting whether the aluminum section is qualified or not is fulfilled. The image information acquired by the camera for detecting the pressing mark is processed by the industrial personal computer, so that the pressing mark of the aluminum section under the quick movement condition is effectively detected, and the invention has the characteristics of simple and compact detection device and simple and reliable detection method.
Description
Technical field
The present invention relates to the online measuring technique field, relate in particular to reflective photoelectric switch and the method for video camera utilized whether existing standard compliant impression to detect automatically on the aluminium section bar workpiece that is applied to photovoltaic generating system.
Background technology
Aluminium section bar is a large amount of structural members that adopt in the photovoltaic generating system, and along with the development of photovoltaic system, the requirement of photovoltaic aluminium section bar is increasing.The surface of aluminium section bar need process standard compliant impression, and is on-the-spot in the workshop of photovoltaic generating system, need carry out online detection to whether having formed qualified impression on the aluminium section bar.At present domestic majority photovoltaic generation enterprise still adopts manual observation to the detection of aluminium section bar, establishes some workmans and estimates and handle in that the aluminium section bar travelling belt is other, according to impression is whether qualified the aluminium section bar workpiece is divided into certified products and unacceptable product.
The shortcoming that manual detection exists mainly contains: the on-the-spot dust in workshop is many, noise is big, and workman's testing environment is abominable; Discomforts such as the long-time uninterrupted observation moving object meeting generation dim eyesight of normal eye, eye expand, omission, false retrieval phenomenon take place in testing staff's non-stop run for a long time easily; For the detection of high dimensional accuracy, human eye is difficult to judge that accurately error is big, can't guarantee to detect quality; The speed of artificial observation is limited, and production efficiency is had very big restriction.
Therefore; According to the requirement of different length aluminium section bar, research is based on the on-line detecting system of Electromechanical Control technology, and research is to the detection method of impression; Realize the quick online detection of aluminium section bar, be very important for the automated production of aluminium secondary industry provides technology to support with equipment.
Summary of the invention
The object of the present invention is to provide a kind of photovoltaic aluminium section bar impression online test method; Improve efficient and accuracy that aluminium section bar detects; Capture omission, false retrieval phenomenon difficult point that manual observation causes; Realize the full-automatic aluminium section bar of producing, rely on machine to accomplish fully, support for the safe and reliable production of aluminium section bar provides technology and equipment from the detection that is worked into of aluminium section bar.
Technical scheme of the present invention is following:
A kind of photovoltaic aluminium section bar impression online test method is characterized in that comprising the steps:
1) make up detection system:
Initial optoelectronic switch is installed on the aluminium section bar travelling belt, is finished optoelectronic switch and video camera; Said initial optoelectronic switch, end optoelectronic switch are connected with video camera respectively, and said initial optoelectronic switch, end optoelectronic switch are connected with industrial computer with video camera;
2) the aluminium section bar workpiece passes through the surveyed area on the aluminium section bar travelling belt fast, successively triggers said initial optoelectronic switch, video camera, end optoelectronic switch, video camera, gathers the impression image at aluminium section bar workpiece two ends;
2.1) IMAQ first time of initial optoelectronic switch and video camera:
When the aluminium section bar workpiece gets into surveyed area, trigger initial optoelectronic switch, initial optoelectronic switch becomes high level from low level; This moment, camera acquisition one width of cloth comprised the image of impression;
2.2) finish the IMAQ second time of optoelectronic switch and video camera:
When the aluminium section bar workpiece is about to leave surveyed area, trigger and finish optoelectronic switch, finish optoelectronic switch and become low level from high level; This moment, camera acquisition one width of cloth comprised the image of impression;
3) in the internal memory of industrial computer, discern the impression in the image by industrial computer with IMAQ for video camera, and the impression recognition result of comprehensive front and back two width of cloth images confirms whether workpiece is qualified, and concrete steps are following:
When video camera photographs image, at first be converted into gray-scale map, and carry out filtering and picture smooth treatment through transfer algorithm; Afterwards; Pixels all on the image is carried out binary conversion treatment, and disposal route is: select a certain neighborhood around this point according to the workpiece situation, the gray-scale value of points all in this neighborhood is carried out direct mean value calculation or by calculating mean value after the Gaussian distribution weighting; If mean value is greater than this gray-scale value; Then this point is judged to be black, otherwise is judged to be white, simultaneously with the image inverse; The morphology that according to surface of the work situation again carries out one or many image expand or shrink after, seek white connected region thereafter; White connected region is judged,, then be not judged to be no impression if meet, and impression is marked on the image if meeting impression image rule judges that then impression is arranged; At last this impression mark is placed relevant position and demonstration on the original image; If two width of cloth images that video camera is gathered all have been judged as impression through after the above-mentioned steps, confirm that then workpiece is certified products.
Said initial optoelectronic switch is following with the installation site of finishing optoelectronic switch: when the aluminium section bar workpiece is in surveyed area; Said initial optoelectronic switch with finish optoelectronic switch and be positioned at the lower face that the aluminium section bar workpiece has impression, with the aluminium section bar workpiece Surface Vertical of impression is arranged.
The installation site of said video camera is following: when the aluminium section bar workpiece was in surveyed area, there was the surface of impression the position for video camera in the aluminium section bar workpiece, with the aluminium section bar workpiece Surface Vertical of impression was arranged.
Said beginning optoelectronic switch is following with the relative position that finishes optoelectronic switch and video camera: the horizontal range of said initial optoelectronic switch and video camera equals the distance of right side impression to edge, aluminium section bar workpiece the right, and the horizontal range of said end optoelectronic switch and video camera equals the distance of left side impression to aluminium section bar workpiece left margin.
Useful technique effect of the present invention is:
One, the present invention is fixed in pick-up unit on the aluminium section bar travelling belt, and optoelectronic switch and camera fixing realize contactless detection on pick-up unit; When aluminium section bar fast through the monitored area, successively trigger initial optoelectronic switch, video camera, end optoelectronic switch, video camera, again by industrial computer through to the IMAQ information processing, and then judge whether aluminium section bar qualified.Mounting means is simple, and detection method is reliable, and is compared with present other existing detection mode, more reliable, convenient.
Two, the original image of video camera shooting of the present invention; Through discerning the existence zone of impression after filtering and the binaryzation conversion; Because impression location relative fixed on image; Can be only to occur in the image impression partly analyze with raising speed with reduce error, image marked good impression position and analyzed area after the identification are for making image more intuitively place mark on the original image and showing.
Three, the optoelectronic switch that the present invention designed selects infrared LED as infrarede emitting diode, and photoelectricity receives triode as infrared receiving tube, and shock resistance and anti-seismic performance are good, and reliability is high, and the life-span is long.Consider that aluminium section bar detects the relation of time space position, selects reflective receive mode.Video camera is selected high-speed camera, can guarantee that image definition is in tolerance interval.
Description of drawings
Fig. 1 is initial optoelectronic switch, the installation site figure that finishes optoelectronic switch, video camera.
Fig. 2-the 1st, the impression gray level image.
Fig. 2-the 2nd is Fig. 2-1 image of inverse after the binaryzation conversion.
Fig. 2-the 3rd does the image of impression mark on Fig. 2-2.
Fig. 2-the 4th transfers to the image on Fig. 2-1 with the impression mark on Fig. 2-3.
Embodiment
Further specify below in conjunction with the accompanying drawing specific embodiments of the invention.
At first, make up impression on-line detecting system as shown in Figure 1.Initial optoelectronic switch 1 is installed on the pick-up unit of aluminium section bar travelling belt, is finished optoelectronic switch 2 and video camera 3.Beginning optoelectronic switch 1, end optoelectronic switch 2 are connected with video camera 3 respectively.And with initial optoelectronic switch 1, to finish optoelectronic switch 2 and video camera 3 and the industrial computer of detection signal being handled judgement be that the electric-control system of core is connected (industrial computer is not shown in Fig. 1).Initial optoelectronic switch 1 can detect the arrival of workpiece, takes order for simultaneously video camera 3; Finish optoelectronic switch 2, can detect the end of workpiece, take order for simultaneously video camera 3; Video camera 3 can detect the situation of impression.
As shown in Figure 1; Initial optoelectronic switch 1, the installation site of finishing optoelectronic switch 2 and video camera 3 are respectively: when aluminium section bar workpiece 4 is in surveyed area; Be used for the lower face that impression is arranged that reference position initial optoelectronic switch of judging 1 and the end optoelectronic switch 2 that is used for the end position judgement are installed on aluminium section bar workpiece 4; And the Surface Vertical that impression is arranged with aluminium section bar workpiece 4; And apart from the surface that impression is arranged one segment distance of aluminium section bar workpiece 4, this distance can be adjusted according to the designing requirement of optoelectronic switch.
Next, adjust initial optoelectronic switch 1, finish the relative position of optoelectronic switch 2 and video camera 3, make that video camera 3 can collect the impression image just when having signal to change.Specifically, promptly the initial optoelectronic switch among Fig. 11 equals the distance of impression 5 to edge, aluminium section bar workpiece 4 the right with the horizontal range of video camera 3, and the horizontal range of end optoelectronic switch 2 and video camera 3 equals the distance of impression 6 to aluminium section bar workpiece 4 left margins.Initial optoelectronic switch 1 is symmetrical with respect to video camera 3 positions with the position of finishing photoswitc 2.
When above-mentioned initial optoelectronic switch 1, finish that optoelectronic switch 2 and video camera 3 install according to the position of Fig. 1 and in running order, can the aluminium section bar workpiece 4 of each process be detected.Specifically, the detection step of a workpiece is: when aluminium section bar workpiece 4 gets into surveyed areas, trigger initial optoelectronic switch 1 earlier, initial optoelectronic switch 1 becomes high level from low level; This moment, video camera 3 was positioned at directly over the impression 5, gathered the image that a width of cloth comprises impression 5; When aluminium section bar workpiece 4 is about to leave surveyed area, trigger to finish optoelectronic switch 2, finish optoelectronic switch 2 and become low level from high level, this moment, video camera 3 was positioned at directly over the impression 6, gathered the image that a width of cloth comprises impression 6; Last aluminium section bar workpiece 4 leaves initialize switch, makes initial optoelectronic switch 1 become low level from high level, and so far a workpiece sensing finishes.
Shown in Fig. 2-1 ~ 2-4; By black and white or colour TV camera 3 with after IMAQ is in the internal memory of industrial computer; In industrial computer, adopt machine vision technique to come impression in the image is discerned, the judged result of comprehensive front and back two width of cloth impression images confirms whether workpiece is qualified.Specifically comprise four steps:
When video camera photographs image, at first be converted into gray-scale map, and carry out filtering and picture smooth treatment through transfer algorithm, this moment, the gray-scale value at impression place obviously reduced (seeing Fig. 2-1).Discern impression through gray-scale value mean value afterwards; Pixels all on the image is carried out binary conversion treatment, and disposal route is: select a certain neighborhood around this point according to the workpiece situation, the gray-scale value of points all in this neighborhood is carried out direct mean value calculation or by calculating mean value after the Gaussian distribution weighting; If mean value is greater than this gray-scale value; Then this point is judged to be black, otherwise is judged to be white, simultaneously with image inverse (seeing Fig. 2-2).The morphology that according to surface of the work situation again carries out one or many image expand or shrink after, seek white connected region thereafter.White connected region is judged,, then be not judged to be no impression, and impression is marked on the image (sees Fig. 2-3) if meet if meet impression image rule and judge that then impression is arranged.For making image more directly perceived, this impression mark is placed relevant position and demonstration (seeing Fig. 2-4) on the original image at last.If two width of cloth images that video camera is gathered all have been judged as impression through after the above-mentioned steps, confirm that then workpiece is certified products.
Above-described only is preferred implementation of the present invention, the invention is not restricted to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite that does not break away from basic design of the present invention, all should think to be included within protection scope of the present invention.
Claims (4)
1. a photovoltaic aluminium section bar impression online test method is characterized in that comprising the steps:
1) make up detection system:
Initial optoelectronic switch is installed on the aluminium section bar travelling belt, is finished optoelectronic switch and video camera; Said initial optoelectronic switch, end optoelectronic switch are connected with video camera respectively, and said initial optoelectronic switch, end optoelectronic switch are connected with industrial computer with video camera;
2) the aluminium section bar workpiece passes through the surveyed area on the aluminium section bar travelling belt fast, successively triggers said initial optoelectronic switch, video camera, end optoelectronic switch, video camera, gathers the impression image at aluminium section bar workpiece two ends;
2.1) IMAQ first time of initial optoelectronic switch and video camera:
When the aluminium section bar workpiece gets into surveyed area, trigger initial optoelectronic switch, initial optoelectronic switch becomes high level from low level; This moment, camera acquisition one width of cloth comprised the image of impression;
2.2) finish the IMAQ second time of optoelectronic switch and video camera:
When the aluminium section bar workpiece is about to leave surveyed area, trigger and finish optoelectronic switch, finish optoelectronic switch and become low level from high level; This moment, camera acquisition one width of cloth comprised the image of impression;
3) in the internal memory of industrial computer, discern the impression in the image by industrial computer with IMAQ for video camera, and the impression recognition result of comprehensive front and back two width of cloth images confirms whether workpiece is qualified, and concrete steps are following:
When video camera photographs image, at first be converted into gray-scale map, and carry out filtering and picture smooth treatment through transfer algorithm; Afterwards; Pixels all on the image is carried out binary conversion treatment, and disposal route is: select a certain neighborhood around this point according to the workpiece situation, the gray-scale value of points all in this neighborhood is carried out direct mean value calculation or by calculating mean value after the Gaussian distribution weighting; If mean value is greater than this gray-scale value; Then this point is judged to be black, otherwise is judged to be white, simultaneously with the image inverse; The morphology that according to surface of the work situation again carries out one or many image expand or shrink after, seek white connected region thereafter; White connected region is judged,, then be not judged to be no impression if meet, and impression is marked on the image if meeting impression image rule judges that then impression is arranged; At last this impression mark is placed relevant position and demonstration on the original image; If two width of cloth images that video camera is gathered all have been judged as impression through after the above-mentioned steps, confirm that then workpiece is certified products.
2. according to the said photovoltaic aluminium section bar of claim 1 impression online test method; It is characterized in that: said initial optoelectronic switch is following with the installation site of finishing optoelectronic switch: when the aluminium section bar workpiece is in surveyed area; Said initial optoelectronic switch with finish optoelectronic switch and be positioned at the lower face that the aluminium section bar workpiece has impression, with the aluminium section bar workpiece Surface Vertical of impression is arranged.
3. according to the said photovoltaic aluminium section bar of claim 1 impression online test method; It is characterized in that: the installation site of said video camera is following: when the aluminium section bar workpiece is in surveyed area; There is the surface of impression the position for video camera in the aluminium section bar workpiece, with the aluminium section bar workpiece Surface Vertical of impression is arranged.
4. according to the said photovoltaic aluminium section bar of claim 1 impression online test method; It is characterized in that: said beginning optoelectronic switch is following with the relative position that finishes optoelectronic switch and video camera: the horizontal range of said initial optoelectronic switch and video camera equals the distance of right side impression to edge, aluminium section bar workpiece the right, and the horizontal range of said end optoelectronic switch and video camera equals the distance of left side impression to aluminium section bar workpiece left margin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110444225 CN102519983B (en) | 2011-12-27 | 2011-12-27 | Method for detecting pressing mark of photovoltaic aluminum section on line |
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| CN 201110444225 CN102519983B (en) | 2011-12-27 | 2011-12-27 | Method for detecting pressing mark of photovoltaic aluminum section on line |
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| CN102519983A true CN102519983A (en) | 2012-06-27 |
| CN102519983B CN102519983B (en) | 2013-12-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335948A (en) * | 2013-05-31 | 2013-10-02 | 合肥众沃仪器技术有限公司 | Measurement apparatus and method for embossed strength of cigarette paper |
| CN108169241A (en) * | 2018-01-04 | 2018-06-15 | 宁波伊士通技术股份有限公司 | A kind of image-pickup method of production line product |
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| JP2000230926A (en) * | 1999-02-10 | 2000-08-22 | Kawasaki Steel Corp | Method and apparatus for inspecting defect |
| CN101105459A (en) * | 2007-05-15 | 2008-01-16 | 广州市万世德包装机械有限公司 | Empty bottle mouth defect inspection method and device |
| WO2010006895A1 (en) * | 2008-07-16 | 2010-01-21 | Siemens Aktiengesellschaft | Operating method for a processing device processing a metal strip and system for processing a metal strip |
| CN101782526A (en) * | 2010-01-19 | 2010-07-21 | 江苏大学 | Method and device for automatically restoring, measuring and classifying steel dimple images |
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2011
- 2011-12-27 CN CN 201110444225 patent/CN102519983B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4247306A (en) * | 1979-01-17 | 1981-01-27 | Elkem Spigerverket A/S | Detection of flaws in metal members |
| US6085414A (en) * | 1996-08-15 | 2000-07-11 | Packard Hughes Interconnect Company | Method of making a flexible circuit with raised features protruding from two surfaces and products therefrom |
| JP2000230926A (en) * | 1999-02-10 | 2000-08-22 | Kawasaki Steel Corp | Method and apparatus for inspecting defect |
| CN101105459A (en) * | 2007-05-15 | 2008-01-16 | 广州市万世德包装机械有限公司 | Empty bottle mouth defect inspection method and device |
| WO2010006895A1 (en) * | 2008-07-16 | 2010-01-21 | Siemens Aktiengesellschaft | Operating method for a processing device processing a metal strip and system for processing a metal strip |
| CN101782526A (en) * | 2010-01-19 | 2010-07-21 | 江苏大学 | Method and device for automatically restoring, measuring and classifying steel dimple images |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103335948A (en) * | 2013-05-31 | 2013-10-02 | 合肥众沃仪器技术有限公司 | Measurement apparatus and method for embossed strength of cigarette paper |
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| CN108169241A (en) * | 2018-01-04 | 2018-06-15 | 宁波伊士通技术股份有限公司 | A kind of image-pickup method of production line product |
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