CN105911067A - Cable protective jacket surface defect detector and detection method thereof - Google Patents
Cable protective jacket surface defect detector and detection method thereof Download PDFInfo
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- CN105911067A CN105911067A CN201610327890.6A CN201610327890A CN105911067A CN 105911067 A CN105911067 A CN 105911067A CN 201610327890 A CN201610327890 A CN 201610327890A CN 105911067 A CN105911067 A CN 105911067A
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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
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/0008—Industrial image inspection checking presence/absence
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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
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N2021/8924—Dents; Relief flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/063—Illuminating optical parts
- G01N2201/0631—Homogeneising elements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
Abstract
The invention discloses a cable protective jacket surface defect detector and a detection method thereof. The defect detector comprises a detection region, an image acquisition unit and a supporting part, wherein the detection region comprises a columnar hollow cable channel; the image acquisition unit comprises a light source, a plurality of cameras and a display; the light source is fixed on an inner wall of the cable channel; the light source is an annular light source or a dot-shaped light source; the plurality of cameras are uniformly fixed at the periphery of the cable channel at intervals; camera lenses are aligned to the axis direction of the cable channel; the cameras are connected with a gigabit network card in an industrial personal computer through a category 6 enhanced network cable; and the supporting part is arranged under the detection region. The cable protective jacket surface defect detector can be used for detecting the following defects of a cable protective jacket: (1) convex bulges; (2) concave pits and exposed cables, and peeling; (3) non-uniform diameters; and (4) scratches of tubular products and bar materials. The cable protective jacket surface defect detector has a wide detection region and is very practical, and the working efficiency and the product yield of cable protective jacket manufacturers can be effectively improved.
Description
Technical field
The present invention relates to cable jacket detection technique, be specifically related to a kind of cable jacket surface blemish detector and detection method thereof.
Background technology
Bulge that cable, optical cable, sheath surface when producing of cable product easily occur, pit, naked wire, peeling, scratch, and thickness is uneven waits surface blemish.
Owing to sheathing line is last road production process of optical cable, cable, cable, due to existing technical characterstic, i.e. production line speed of production is fast, automaticity is high, it is bad that cable jacket is easy to produce flaw in process of production, if can not directly when producing to bad detecting, getting rid of, to directly influence the product quality of optical cable, cable, the later stage circulates causes quality to complain in client, gives and produces manufacturer and bring the biggest loss.
Existing cable wire bushing detects, use two groups or three groups of laser sensors, laser sensor is distributed in the surrounding of cable, the laser blocked by cable, calculate current diameter, and by the fluctuation of diameter, judge the problems such as whether present cable wire bushing has bulge, broken hole and diameter abnormal.Fig. 1 is the schematic diagram of laser sensor of the prior art.The equipment shown in 2 groups (vertical distribution) or 3 groups of (120 degree of distributions) Fig. 1 is used in actual industrial.
But use the bulge of laser detection cable wire bushing and broken skin, have following a few point defect:
1, after detecting problem, there is no picture, it is impossible to carry out artificial judgment.
2, it is source of parallel light due to laser, uses two groups or three groups of laser, blind area can be produced, and use more sensor can bring extra cost and the generation of blind area cannot be avoided.Fig. 2 is the schematic diagram of laser blind area.As in figure 2 it is shown, black region is the blind area of laser.
Summary of the invention
For the deficiencies in the prior art, the invention discloses a kind of cable jacket surface blemish detector and detection method thereof.
Technical scheme is as follows:
A kind of cable jacket surface blemish detector, including detection zone, image acquisition units and support member；Described detection zone includes the hollow cable passage in column；Described image acquisition units includes light source, camera and industrial computer；Described industrial computer is internally installed network interface card；Described light source is fixed on the inwall of cable passage；Described light source is annular light source or point source of light；Described camera is provided with multiple, the evenly spaced cable passage surrounding that is fixed on, the axis direction of camera lens alignment cable passage；Camera is connected with industrial computer by network interface card；Described support member is arranged on below detection zone.
Its further technical scheme is: described light source is annular light source, is provided with two groups, and one group is fixed on porch, cable passage, and one group is fixed on exit, cable passage.
Its further technical scheme is: described camera is provided with three or four；If camera is provided with three, then three camera intervals are uniformly fixed on cable passage surrounding, and the angle that is separated by between adjacent camera is 120 °；If camera is provided with four, then four camera intervals are uniformly fixed on cable passage surrounding, and the angle that is separated by between adjacent camera is 90 °.
Its further technical scheme is: be provided with cylinder in described support member, and detection zone can be driven upwardly or downwardly to move.
Its further technical scheme is: also include that control circuit, described control circuit include manostat and encoder, and the input output 220V single-phase alternating current of manostat, outfan connects industrial computer, 24V Switching Power Supply and 12V Switching Power Supply respectively；The outfan output 24V unidirectional current of described 24V Switching Power Supply, connects described light source；The outfan output 12V unidirectional current of described 12V Switching Power Supply, connects described encoder and camera respectively；The input of described encoder gathers the gait of march signal of cable, and the pulse signal emission port of encoder launches pulse, drives the photographing switch of described camera；Being also associated with network interface card on described industrial computer, described network interface card is connected with the data transmission port of camera by netting twine.
A kind of its detection method of cable jacket surface blemish, comprises the following steps:
Step 1, cable pass through cable passage, enter the scanning area of camera, and encoder gathers the Negotiation speed of cable, and the rate of scanning of speed controlling camera according to this；The rate signal that camera collects according to encoder carries out the sync pulse jamming that speed is identical；
Step 2, software are adopted figure control unit and are driven the image transmitted to pass to image pre-processing unit in camera；The image that camera drives transmission is gray value gray-scale map in the range of 0～255, sets image intensity value separation n；Image is split by image pre-processing unit, and image intensity value is the region of 0～n, it is determined that for background area, image intensity value is the region of n～255, it is determined that for cable region；
Step 3, Effective judgement is done in the cable region being partitioned into, when height, width and the gray value of cut zone meet require time, it is judged that segmentation is effectively；
The requirement for height of cut zone is: cut zone runs through whole image in a longitudinal direction；
The width requirement of cut zone is: set a normal width value scope；Cut zone is longitudinally divided into several etc. subregion, the width of the subregion center line cables such as all is averaged, as the width of cut zone；The width of cut zone is within the scope of normal width value；
The gray value of cut zone requires: set a standard gray angle value scope；Within the intensity value ranges that in cable image in cut zone, the meansigma methods of the gray value of all pixels sets at this；
Effective coverage is passed to fault detection analysis unit by step 4, image pre-processing unit；
Step 5, fault detection analysis unit carry out Threshold segmentation to effective coverage；Set Threshold segmentation higher limit xmax, Threshold segmentation lower limit xmin, obtain gray value pixel between xmax～xmin in cable image, it is determined that for abnormity point, the abnormal area of abnormity point composition entirety is stored in internal memory；Overall abnormal area is carried out UNICOM's operation, makes multiple independent abnormal area；And multiple independent abnormal areas are judged:
Set a Maximum Area ymax, set area minima ymin, when abnormal area area is less than minima, be then judged to noise spot, not as defect detection, when anomaly area is more than maximum, be then judged to abnormity point, not as defect detection；
Set a gray scale maximum zmax, set minimum gray value zmin, when the gray value of abnormal area is less than minima, then it is judged to noise spot, not as defect detection, when the gray value of abnormal area is more than maximum, then it is judged to abnormity point, not as defect detection；
Select qualified region, be shown on main interface as defect.
The method have the benefit that:
1, the present invention can be used to detect the following defect effectively detecting cable jacket: 1) protruding bulge；2) pit naked wire, peeling；3) diameter is uneven；4) tubing, the cut of bar and other defect.Detection range extensively and the most practical, can be effectively improved work efficiency and the product yield of cable jacket manufacturer.
2, the image acquisition units of the present invention is mounted with illuminating light source, point source of light can be used, additionally, the invention allows for preferred technical scheme, i.e. cable passage is internal uses two groups of luminous uniform annular light sources, may make up uniform luminous bright field, outside uniform illumination cable jacket, it is ensured that the shooting quality of camera.Specifically used point source of light or annular light source, depend on the diameter of cable and produce the speed that line runs；The cost of point source of light is lower, but if cable diameter is big, the speed of service is big, then may select annular light source, illuminate effect more preferable
3, the image acquisition units of the present invention employs camera.But camera quantity is too much, then cost increase, camera quantity is very few, then cannot photograph the four corner of cable jacket.By many experiments, the present invention proposes preferred technical scheme, i.e. can use three or four cameras.If using four cameras, then can be with 100% covering diameter cable more than more than 50mm；If using three cameras, then can be with 100% covering diameter cable less than below 50mm.The cable parameter that can measure as required selects appropriate number of camera, with cost-effective on the basis of shooting completely.
4, the present invention propose control circuit and detection method, defect picture can be preserved for a long time, and in data base, record the information such as the batch number of defect, size, position, it is simple to user collects product quality data.
5, the present invention proposes control circuit and detection method, can show current product defects image information in real time, effectively helps user to solve to produce abnormal in real time, improves production technology.
6, the present invention controls the shooting of camera, the capture rate of adjustable camera so that it is the translational speed of the cable collected with encoder is equal so that the image collected will not produce ratio distortion because of the change of speed by encoder.
7, the detection method that the present invention proposes, can coordinate detector, effectively pick out the product that may have flaw problem, carries out judging and flaw problem being shown.Cable wire bushing surface can be carried out 100% covering scanning, any one defect point can not be omitted.Contribute to Improving The Quality of Products, increase the brand benefit of consumer products.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of laser sensor of the prior art.
Fig. 2 is the schematic diagram of laser blind area.
Fig. 3 is the side view of flaw detecting instrument.
Fig. 4 is the front view of flaw detecting instrument.
Fig. 5 is the luminous schematic diagram of annular light source.
Fig. 6 is the schematic diagram using three camera shootings.
Fig. 7 is the schematic diagram of control circuit.
Fig. 8 is the flow chart of data processing figure in detection method.
Detailed description of the invention
Fig. 3 is the side view of flaw detecting instrument.Fig. 4 is the front view of flaw detecting instrument.As shown in Figure 3, Figure 4, flaw detecting instrument includes detection zone, image acquisition units and support member.
Detection zone includes the hollow cable passage 1 in column.Cable 6 passes cable passage 1 when detection.
Image acquisition units includes light source 2, camera 3 and display 4.Light source 2 is fixed on the inwall of cable passage 1.Light source 2 can use point source of light or annular light source.Use point source of light cost relatively low, use annular light source then to illuminate effect more preferable.The present embodiment employs two groups of luminous uniform annular light sources, one group of porch being fixed on cable passage 1, one group of exit being fixed on cable passage.Fig. 5 is the luminous schematic diagram of annular light source.As it can be seen, two groups of annular light sources can form equal uniform brightness, the most omnibearing cable that illuminates, increase the identification of camera shooting.
Camera 3 is provided with multiple, the evenly spaced cable passage surrounding that is fixed on, the axis direction of camera lens alignment cable passage.Camera quantity is too much, then cost increase, camera quantity is very few, then cannot shoot cable jacket comprehensively.The invention discloses preferred technical scheme, i.e. camera and can arrange three or four.Fig. 6 is the schematic diagram using three camera shootings.If camera is provided with three, then three camera intervals are uniformly fixed on cable passage surrounding, and the angle that is separated by between adjacent camera is 120 °；If camera is provided with four, then four camera intervals are uniformly fixed on cable passage surrounding, and the angle that is separated by between adjacent camera is 90 °.Experiment display, if using four cameras, then its coverage can be with 100% covering diameter cable more than more than 50mm；If using three cameras, then its coverage can be with 100% covering diameter cable less than below 50mm.Can be according to the quantity of the parameter determination camera of tested cable.
Camera 3 is connected with display 4.The picture transfer shot can be seen processed image from display to display, operator, be chosen by defect cable by camera, to increase the yield selling product.
Support member it is additionally provided with below detection zone.Support member includes cylinder 5.Detection region can be supported by cylinder 5, and detection zone can be driven upwardly or downwardly to move, and changes the high and low position in detection region, to adapt to the requirement of production line.
Fig. 7 is the schematic diagram of control circuit.Control circuit includes manostat 7 and encoder 8, and the input output 220V single-phase alternating current of manostat 7, after pressure stabilization function, outfan still exports the single-phase alternating current of 220V.The outfan of manostat connects industrial computer 9,24V Switching Power Supply 10 and 12V Switching Power Supply 11 respectively.The outfan output 24V unidirectional current of 24V Switching Power Supply 10, connects light source 2.The outfan output 12V unidirectional current of 12V Switching Power Supply 11, connects encoder 8 and camera 3 respectively.Manostat 7,24V Switching Power Supply 10 and 12V Switching Power Supply 11 can use commercially available prod.Industrial computer 9 can use the personal computer with data processing function of routine.
Light source 2 is annular light source, in the present embodiment, be model be the LED of CREE Q5.The model of encoder 8 is interior close control OVW-1024-2MHT, its signal input port connection speed sensor, gathers the rate signal that cable 6 is advanced, and its pulse output end mouth controls the photographing switch of camera.
Model be the encoder 8 of interior close control OVW-1024-2MHT be rotary encoder, there is an axle at encoder center, this axle is driven to rotate by external force, often rotate a certain angle, encoder can export two groups of signals from A road and B road simultaneously, often the group each circle of signal exports 1024 pulse signals altogether, and these two groups of signals are the output of dislocation 1/4 cycle, i.e. when A road signal is in the half of crest state, B road signal initially enters crest state, when A road signal ended crest state, when jumping to trough state, B road signal is in the half of crest state.
Camera 3 be model be the line scan camera of DALSA SF-10-02K40-GE-02, the Gige interface of camera 3 by netting twine connect network interface card 12.The model of network interface card 12 is Intel PRO/1000PTEXP19404PT, is connected on industrial computer 9.Industrial computer 9 connects display, output detections result by RS232 interface.
The operation principle of flaw detecting instrument is, after manostat 7 and 24V Switching Power Supply 10 and 12V Switching Power Supply 11 is powered for system relevant portion, encoder 8 runs simultaneously with cable 6, and encoder 8 sends pulse signal and switchs to the shooting of camera 3, camera 3 is carried out shooting by the pulse signal driving of encoder and adopts figure.Owing to encoder 8 is with cable 6 runs simultaneously, therefore pulse signal frequency and the speed Complete Synchronization of cable so that the image collected will not produce ratio distortion because of the change of speed.
Image captured by camera 3 is sent to network interface card 12 by Gige interface, i.e. kilomega network interface, and industrial computer 0 reads, by network interface card, the image that camera 3 is collected, it is judged that product defect, and transmits the result to display device by RS232 interface.
The invention also discloses a kind of cable jacket surface flaw detecting method, Fig. 8 is the flow chart of data processing figure in detection method.In conjunction with Fig. 8, industrial computer includes that software adopts figure control unit, image pre-processing unit, fault detection analysis unit.Detection method specifically includes following steps:
Step 1, cable pass through cable passage, enter the scanning area of camera, and encoder gathers the Negotiation speed of cable, and the rate of scanning of speed controlling camera according to this；The rate signal that camera collects according to encoder carries out the sync pulse jamming that speed is identical；
Step 2, software are adopted figure control unit and are driven the image transmitted to pass to image pre-processing unit in camera；The image that camera drives transmission is gray value gray-scale map in the range of 0～255, sets image intensity value separation n；Image is split by image pre-processing unit, and image intensity value is the region of 0～n, it is determined that for background area, image intensity value is the region of n～255, it is determined that for cable region.
In the present embodiment, model be DALSA SF-10-02K40-GE-02 collected by camera to be 8 gray-scale maps, picture size is 2048*500, horizontal 2048 pixels, longitudinally 500 pixels.In image, each pixel is represented by the gray value of 0～255, and gray value is that 0 representative image is completely black, and gray value is that 255 representative image are the whitest.Angle and the angle of shooting due to detector polishing, make collected image background the most completely black, i.e. close to 0, cable region is then due to the surface diffuse-reflectance to light, image is in the gray value interval of 40～50, and in the present embodiment, use 20 is as the separation of gray scale, background area is regarded as in gray scale region between 0～19, and cable region is regarded as in gray scale region between 20～255.
Step 3, to the cable region being partitioned into, i.e. cut zone, do Effective judgement.The cable map picture that cut zone is i.e. selected.When height, width and the gray value of cut zone meet require time, it is judged that segmentation is effectively.Details are as follows for the requirements of cut zone:
(1) requirement for height of cut zone is: cut zone runs through whole image in a longitudinal direction；
The coordinate Y2 of this cut zone bottommost deducts the height that coordinate Y1 is region of this cut zone top.Owing to cable continuously produces, therefore cable in the picture must be longitudinally through full figure, say, that the height H=Y2-Y1+1 of image, therefore when the value of Y2-Y1+1 is equal to H, it is judged that cut zone is effective coverage.In practical operation, it will usually leave certain surplus, such as can set as Y2-Y1+1 >=H*0.98 in a program, then judge to meet this condition.Height parameter is determined by program is internal, can not freely arrange.
(2) width requirement of cut zone is: set a normal width value scope；Cut zone is longitudinally divided into several etc. subregion, the width of the subregion center line cables such as all is averaged, as the width of cut zone；The width of cut zone is within the scope of normal width value；
This requires the judgement of i.e. horizontal to cable region width.Owing to cable has shake in running unavoidably, the cable image therefore photographed can present certain distortion.When measuring the width in cable region, considering efficiency and precision, the method that program uses block sampling to be averaging calculates width.In the present embodiment, choosing the cut zone in any image, longitudinally it is divided into 10 intervals, in each interval, take middle row, measurement cut zone, at two, the left and right of this row boundary point X1, X2, calculates the width W1=X2-X1 of this row.Value W1 10 interval measure arrived, W2, W3...W10 average, and i.e. obtain the width W of present cable.
When actually used, user, according to cable thickness situation of change, sets the effective range of width.Such as, normal width is 100 pixels, and during actual production, the thickness of cable likely can be in ± 20% fluctuation, then in just width effective range being set as 80-120 interval.
(3), the gray value requirement of cut zone is: set a standard gray angle value scope；Within the intensity value ranges that in cable image in cut zone, the meansigma methods of the gray value of all pixels sets at this；
In practical operation, the effective range being set by the user average gray value is interval.The meansigma methods of all pixel gray values in average gray value i.e. effective coverage.User, by regulation production technology, can measure the cable surface gray value under different process, and in this, as setting interval.Therefore, when the cable region photographed exceedes the scope that user sets, software can be judged to invalid image, not detect.
Effective coverage is passed to fault detection analysis unit by step 4, image pre-processing unit；
Step 5, step 5, fault detection analysis unit carry out Threshold segmentation to effective coverage；Set Threshold segmentation higher limit xmax, Threshold segmentation lower limit xmin, obtain gray value pixel between xmax～xmin in cable image, it is determined that for abnormity point, the abnormal area of abnormity point composition entirety is stored in internal memory；Overall abnormal area is carried out UNICOM's operation, makes multiple independent abnormal area；And multiple independent abnormal areas are judged:
Set a Maximum Area ymax, set area minima ymin, when abnormal area area is less than minima, be then judged to noise spot, not as defect detection, when anomaly area is more than maximum, be then judged to abnormity point, not as defect detection；
Set a gray scale maximum zmax, set minimum gray value zmin, when the gray value of abnormal area is less than minima, then it is judged to noise spot, not as defect detection, when the gray value of abnormal area is more than maximum, then it is judged to abnormity point, not as defect detection；
Select qualified region, be shown on main interface as defect.
In steps of 5, owing to light source uses oblique polishing, camera uses vertical shooting, and the most this polishing mode can make any depression on smooth surface all can reflect light with projection and form a bright spot, and abnormal area is brighter than cable region.So by Threshold segmentation, gray value in image can be selected and meets the set of the pixel of a certain scope.
Such as, in a certain embodiment, arranging Threshold segmentation lower limit is 128, higher limit is 255, then software is in cable region, finds all gray values pixel between 128-255, it is judged to abnormity point, abnormity point is carried out UNICOM's operation, make multiple independent abnormal area；And store unified for these regions, the result as Threshold segmentation is stored in internal memory.
So-called connection operation, is a noun in image algorithm.After Threshold segmentation, define many zonules.In computer-internal, these regions store with an entirety, connection operation, it is simply that find out all of isolated area in an entirety, and isolated area can separate and individually stores, in order to later stage process.
After connection operation, program can individually calculate their area, the pixel number that i.e. this region comprises, and the average gray in this block region to each independent abnormal area, and judges independent abnormal area.
Finally by qualified region, it is shown on main interface as defect.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above example.It is appreciated that the oher improvements and changes that those skilled in the art the most directly derive or associate, within being all considered as being included in protection scope of the present invention.
Claims (6)
1. a cable jacket surface blemish detector, it is characterised in that: include detection zone, image acquisition units and support member；Described detection zone includes the hollow cable passage in column；Described image acquisition units includes light source, camera and industrial computer；Described industrial computer is internally installed network interface card；Described light source is fixed on the inwall of cable passage；Described light source is annular light source or point source of light；Described camera is provided with multiple, the evenly spaced cable passage surrounding that is fixed on, the axis direction of camera lens alignment cable passage；Camera is connected with industrial computer by network interface card；Described support member is arranged on below detection zone.
2. cable jacket surface blemish detector as claimed in claim 1, it is characterised in that: described light source is annular light source, is provided with two groups, and one group is fixed on porch, cable passage, and one group is fixed on exit, cable passage.
3. cable jacket surface blemish detector as claimed in claim 1, it is characterised in that: described camera is provided with three or four；If camera is provided with three, then three camera intervals are uniformly fixed on cable passage surrounding, and the angle that is separated by between adjacent camera is 120 °；If camera is provided with four, then four camera intervals are uniformly fixed on cable passage surrounding, and the angle that is separated by between adjacent camera is 90 °.
4. cable jacket surface blemish detector as claimed in claim 1, it is characterised in that: it is provided with cylinder in described support member, detection zone can be driven upwardly or downwardly to move.
5. cable jacket surface blemish detector as claimed in claim 1, it is characterized in that: also include control circuit, described control circuit includes manostat and encoder, and the input output 220V single-phase alternating current of manostat, outfan connects industrial computer, 24V Switching Power Supply and 12V Switching Power Supply respectively；The outfan output 24V unidirectional current of described 24V Switching Power Supply, connects described light source；The outfan output 12V unidirectional current of described 12V Switching Power Supply, connects described encoder and camera respectively；The input of described encoder gathers the gait of march signal of cable, and the pulse signal emission port of encoder launches pulse, drives the photographing switch of described camera；Being also associated with network interface card on described industrial computer, described network interface card is connected with the data transmission port of camera by netting twine.
6. its detection method of cable jacket surface blemish, it is characterised in that comprise the following steps:
Step 1, cable pass through cable passage, enter the scanning area of camera, and encoder gathers the Negotiation speed of cable, and the rate of scanning of speed controlling camera according to this；The rate signal that camera collects according to encoder carries out the sync pulse jamming that speed is identical；
Step 2, software are adopted figure control unit and are driven the image transmitted to pass to image pre-processing unit in camera；The image that camera drives transmission is gray value gray-scale map in the range of 0～255, sets image intensity value separation n；Image is split by image pre-processing unit, and image intensity value is the region of 0～n, it is determined that for background area, image intensity value is the region of n～255, it is determined that for cable region；
Step 3, Effective judgement is done in the cable region being partitioned into, when height, width and the gray value of cut zone meet require time, it is judged that segmentation is effectively；
The requirement for height of cut zone is: cut zone runs through whole image in a longitudinal direction；
The width requirement of cut zone is: set a normal width value scope；Cut zone is longitudinally divided into several etc. subregion, the width of the subregion center line cables such as all is averaged, as the width of cut zone；The width of cut zone is within the scope of normal width value；
The gray value of cut zone requires: set a standard gray angle value scope；Within the intensity value ranges that in cable image in cut zone, the meansigma methods of the gray value of all pixels sets at this；
Effective coverage is passed to fault detection analysis unit by step 4, image pre-processing unit；
Step 5, fault detection analysis unit carry out Threshold segmentation to effective coverage；Set Threshold segmentation higher limit xmax, Threshold segmentation lower limit xmin, obtain gray value pixel between xmax～xmin in cable image, it is determined that for abnormity point, the abnormal area of abnormity point composition entirety is stored in internal memory；Overall abnormal area is carried out UNICOM's operation, makes multiple independent abnormal area；And multiple independent abnormal areas are judged:
Set a Maximum Area ymax, set area minima ymin, when abnormal area area is less than minima, be then judged to noise spot, not as defect detection, when anomaly area is more than maximum, be then judged to abnormity point, not as defect detection；
Set a gray scale maximum zmax, set minimum gray value zmin, when the gray value of abnormal area is less than minima, then it is judged to noise spot, not as defect detection, when the gray value of abnormal area is more than maximum, then it is judged to abnormity point, not as defect detection；
Select qualified region, be shown on main interface as defect.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108107305A (en) * | 2017-12-28 | 2018-06-01 | 重庆市南方阻燃电线电缆有限公司 | A kind of cable detecting device |
| CN108195842A (en) * | 2017-12-28 | 2018-06-22 | 无锡精质视觉科技有限公司 | A kind of Novel cable jacket surface flaw detecting instrument and its detection method |
| CN108364287A (en) * | 2018-02-11 | 2018-08-03 | 北京简易科技有限公司 | A kind of monitoring foreign bodies method, apparatus and stamping system |
| CN108918542A (en) * | 2018-08-29 | 2018-11-30 | 成都理工大学 | A kind of cable surface defect detecting device and method |
| CN109085168A (en) * | 2018-09-06 | 2018-12-25 | 易思维（杭州）科技有限公司 | The method for parameter configuration of adhesive tape detection sensor applied to gluing on-line checking |
| CN109559306A (en) * | 2018-11-27 | 2019-04-02 | 广州供电局有限公司 | Crosslinked polyetylene insulated layer surface planarization detection method based on edge detection |
| CN110009603A (en) * | 2019-03-14 | 2019-07-12 | 广州供电局有限公司 | High-voltage cable insulating detection method and high-tension cable maintaining method |
| CN110263812A (en) * | 2019-05-23 | 2019-09-20 | 季华实验室 | Automobile wiring harness sheath classification method and system |
| CN110715608A (en) * | 2018-07-13 | 2020-01-21 | 中惠创智无线供电技术有限公司 | Rail-mounted wireless power supply system and operating equipment for cables |
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| CN114047196A (en) * | 2021-10-25 | 2022-02-15 | 上海仪电智能科技有限公司 | High-precision detection equipment for surface flaws of cable and using method thereof |
| CN115183703A (en) * | 2022-09-08 | 2022-10-14 | 江阴市东昊不锈钢管有限公司 | Image data processing system for smooth appraisal of stainless steel pipe opening |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959303A (en) * | 2017-04-21 | 2017-07-18 | 无锡赛默斐视科技有限公司 | Thin film testing light source and thin film testing system |
| CN106959303B (en) * | 2017-04-21 | 2023-10-31 | 无锡赛默斐视科技有限公司 | Film detection light source and film detection system |
| CN108107305A (en) * | 2017-12-28 | 2018-06-01 | 重庆市南方阻燃电线电缆有限公司 | A kind of cable detecting device |
| CN108195842A (en) * | 2017-12-28 | 2018-06-22 | 无锡精质视觉科技有限公司 | A kind of Novel cable jacket surface flaw detecting instrument and its detection method |
| CN108364287A (en) * | 2018-02-11 | 2018-08-03 | 北京简易科技有限公司 | A kind of monitoring foreign bodies method, apparatus and stamping system |
| CN110715608A (en) * | 2018-07-13 | 2020-01-21 | 中惠创智无线供电技术有限公司 | Rail-mounted wireless power supply system and operating equipment for cables |
| CN110715608B (en) * | 2018-07-13 | 2021-09-21 | 中惠创智（深圳）无线供电技术有限公司 | Rail-mounted wireless power supply system and operating equipment for cables |
| CN108918542A (en) * | 2018-08-29 | 2018-11-30 | 成都理工大学 | A kind of cable surface defect detecting device and method |
| CN109085168A (en) * | 2018-09-06 | 2018-12-25 | 易思维（杭州）科技有限公司 | The method for parameter configuration of adhesive tape detection sensor applied to gluing on-line checking |
| CN109085168B (en) * | 2018-09-06 | 2019-06-25 | 易思维（杭州）科技有限公司 | The method for parameter configuration of adhesive tape detection sensor applied to gluing on-line checking |
| CN109559306B (en) * | 2018-11-27 | 2021-03-12 | 广东电网有限责任公司广州供电局 | Crosslinked polyethylene insulating layer surface smoothness detection method based on edge detection |
| CN109559306A (en) * | 2018-11-27 | 2019-04-02 | 广州供电局有限公司 | Crosslinked polyetylene insulated layer surface planarization detection method based on edge detection |
| CN110009603A (en) * | 2019-03-14 | 2019-07-12 | 广州供电局有限公司 | High-voltage cable insulating detection method and high-tension cable maintaining method |
| CN110009603B (en) * | 2019-03-14 | 2021-01-29 | 广东电网有限责任公司广州供电局 | High-voltage cable insulation detection method and high-voltage cable maintenance method |
| CN110263812A (en) * | 2019-05-23 | 2019-09-20 | 季华实验室 | Automobile wiring harness sheath classification method and system |
| CN111174705A (en) * | 2019-12-04 | 2020-05-19 | 广州市德力达智能设备有限公司 | Cable cutting and stripping quality monitoring device |
| CN114047196A (en) * | 2021-10-25 | 2022-02-15 | 上海仪电智能科技有限公司 | High-precision detection equipment for surface flaws of cable and using method thereof |
| CN115183703A (en) * | 2022-09-08 | 2022-10-14 | 江阴市东昊不锈钢管有限公司 | Image data processing system for smooth appraisal of stainless steel pipe opening |
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