CN102853785B - Contactless bamboo silk pros and cons identification system and discrimination method - Google Patents
Contactless bamboo silk pros and cons identification system and discrimination method Download PDFInfo
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- CN102853785B CN102853785B CN201210123349.5A CN201210123349A CN102853785B CN 102853785 B CN102853785 B CN 102853785B CN 201210123349 A CN201210123349 A CN 201210123349A CN 102853785 B CN102853785 B CN 102853785B
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Abstract
The invention discloses a kind of contactless bamboo silk pros and cons identification system and discrimination method, identification system comprises: base plate, wire feeder, image collecting device and secondary light source device, wire feeder comprises push-and-pull cylinder, clamping device and guide rail, image device comprises imageing sensor, by housing, be located at the built-in camera in housing and picture processing chip composition, auxiliary light device comprises support, the light source holder be connected with support and light source, the present invention is by gathering the image information of bamboo silk surface characteristics, reach the pros and cons of noncontact identification bamboo silk, ensure that bamboo silk surface not easily scratches in identification process, improve the quality of bamboo silk, long service life, simultaneously, adopt vectorization technology and vectorial identification technique, the accuracy rate of image identification is high, overcome bamboo silk itself exist if the defect such as mildew or slight crack is on the impact of identification result.
Description
Technical field
The present invention relates to a kind of bamboo weaving processing unit (plant), refer more particularly to the high contactless bamboo silk pros and cons identification system of a kind of identification precision and discrimination method.
Background technology
Bamboo plaited article is as Green Product, be widely used, as the bamboo silk of bamboo plaited article raw material, when dropping into machine knits, correctly judge that bamboo silk pros and cons then exists certain difficulty fast, conveniently wire feed workman directly can distinguish the pros and cons of bamboo silk in operation by finger allodynia, drawing mill is that bamboo silk devises significant appearance difference, bamboo silk front face surface is smooth, two edges are rectangular or acute angle-shaped, touch has significant corner angle sense, and the surface undulation of bamboo silk reverse side, edge is generally in arc curve, middle with obvious groove, generally all adopt manual work now, by the touch of staff to bamboo silk surface, judge the pros and cons of bamboo silk, labour intensity is large, accuracy rate is low, and the easy production sense of fatigue of workman, reduce product quality and output, photoelectric sensor is as the important detection part of in modern industry electromechanical integration equipment, be widely used in location, position, color recognition and material analysis field, by photoelectric device to the reception of body surface reflection ray and analysis, can position object, identify and analyze, if China Patent No. is CN201120195262.X, name is called a kind of utility model patent of identification bamboo silk pros and cons contact photoelectric sensor, comprise left sensor and right sensor, left sensor or right sensor comprise matrix some groups of identification units and circuit board, matrix is that light-proof material is made, often organize identification unit and comprise a pair photoemissive device and photoelectric receiving device, photoemissive device and photoelectric receiving device are electrically connected with circuit board respectively, bamboo silk is clipped between left sensor and right sensor, by being symmetrical arranged sensor at bamboo silk pros and cons, detection can be carried out to the positive and negative surface of bamboo silk to compare simultaneously, but this utility model is detected by contact photoelectric, higher to the requirement of ambient light, easily cause detection data distortion, sensitivity and accuracy rate are not high, and meanwhile, bamboo silk surface also easily produces cut, affects the quality of product.
Summary of the invention
The present invention mainly solves that manual detection labour intensity is large, accuracy rate is low, and contact photoelectric detects and easily affects by ambient light the technical matters causing sensitivity and accuracy rate not high; Provide the high contactless bamboo silk pros and cons identification system of a kind of accuracy rate and discrimination method.
In order to solve the technical matters of above-mentioned existence, the present invention mainly adopts following technical proposals:
Contactless bamboo silk pros and cons identification system of the present invention, acts on the positive and negative surperficial identification of bamboo silk,
The front flat smooth of described bamboo silk, and the centre of reverse side is provided with groove, described identification system comprises:
Base plate, in tabular, for installing wire feeder, image collecting device and auxiliary light device;
Wire feeder, for bamboo silk being clamped and delivering to image collecting device place, comprise push-and-pull cylinder, the clamping device be connected with push-and-pull cylinder and guide rail, described clamping device is located at also can along slide on guide rail, and gripper mechanism grips bamboo silk is parallel to base plate and makes bamboo silk pros and cons perpendicular to backplate surface;
Image collecting device, comprise imageing sensor, just to bamboo silk surface, for the surface characteristics collection of bamboo silk is analyzed, imageing sensor comprises housing, be located at built-in camera in housing and picture processing chip, described housing is provided with the aperture consistent with bamboo silk its clamped height, and the camera lens of described built-in camera is located at described aperture place, and the image information that built-in camera collects is sent on master controller by data line after treatment;
Secondary light source device, for producing the light and shade lines of sharp contrast on bamboo silk surface, comprises the support be fixed on base plate, the light source holder be connected with cradle top and the light source be placed in light source holder.
As preferably, the aperture place of described housing is provided with transparent glass, and described housing is in sealing shape, and all critical component of sensor is all sealed in housing, bamboo silk image enters in camera lens by transparent glass, prevents outside dust and the shooting part of influence of moisture precision.
As preferably, described image collector is set up and is also provided with blowning installation, and air blowing air-flow aims at described aperture place, and blowning installation by the dust that is attached on transparent glass and water smoke removing, can improve the imaging effect of image.
As preferably, described light source is LED, and described LED, in white or colored, adopts LED not only energy-conservation but also can improve serviceable life of secondary light source.
As preferably, described light source holder is strip cavity body structure, some point-like LED of line spread are provided with in described cavity, cavity bottom is provided with the narrow slit parallel with bamboo silk, the LED light line of point-like forms wire light through narrow slit and projects bamboo silk surface, bamboo silk surface is made to form strong light and shade light belt, light and bamboo silk surface form an incident angle α, the LED light source of some point-like passes the narrow slit of cavity bottom, form the effect of similar linear light source, the light projected on bamboo silk is less parallel light, strong light and shade state can be caused on bamboo silk surface, improve the accuracy of image identification, the groove of bamboo silk reverse side is easily formed obvious blanking bar by certain incident angle in the picture, be convenient to the identification process of imageing sensor.
As preferably, described incident angle α is 30 ° ~ 60 °.
A kind of contactless bamboo silk pros and cons discrimination method, its step is as follows:
A. bamboo silk clamping device gripping bamboo silk, make bamboo silk be parallel to backplate surface, and bamboo silk pros and cons is perpendicular to backplate surface;
B. push-and-pull cylinder action, drives clamping device along slide, makes bamboo silk one end enter within the pick-up lens viewfinder range of sensor;
C. master controller sends " identification " instruction by data line to sensor;
D. imageing sensor enters " identification " state, and secondary light source is lit, the picture on imageing sensor built-in camera shooting bamboo silk surface;
E., after image processing algorithm calculates, imageing sensor identification also judges the pros and cons of bamboo silk;
F. identification result is sent back master controller by data line by imageing sensor;
G. identification completes, and closes secondary light source, and clamping device is retracted original position by push-and-pull cylinder retraction, and clamping device unclamps bamboo silk, completes the identification process of a bamboo silk;
H. repeat A ~ G step, carry out the pros and cons identification of next root bamboo silk.
A kind of image processing algorithm, its flow process is as follows:
A. gather bamboo silk surface image, obtain the original image that resolution is the capable L row of M;
B. adopt image block technology that bamboo silk surface image is longitudinally divided into K equal portions, then can obtain K block size and be the image fritter of the capable N row of M, wherein N=L/K, each image fritter comprises the image information of a bit of bamboo silk;
C. the small images that capable for M N arranges is converted into the summation vector that length is M by employing image vector technology;
D. adopt vectorial identification technique to identify every small images respectively, obtain the identification result that K part is separate;
E. adopt the technology of voting to draw and finally differentiate result.
Because bamboo silk itself may exist as the defect such as mildew or slight crack, if therefore whole bamboo silk is carried out disposable differentiation, the interference that defect part brings will be dispersed on whole bamboo silk, then the recognition effect of bamboo silk is affected, in order to the impact of defect part is limited in subrange, reduce load defect part as far as possible to the entire effect of bamboo silk identification, bamboo silk image block technology and the identification result technology of voting is adopted to overcome, the picture breakdown of bamboo silk is become some fritters, and ensure that each small images is still the narrower bamboo silk image of a width, respectively independent identification is carried out to every fritter bamboo silk image, obtain the identification result with little number of blocks same number, again all fritter identification results are voted, if result is that the poll in front is more, then net result is judged to be front, if result is that the poll of reverse side is more, be then judged to be reverse side, if result is that the poll of " without bamboo silk " is more, then net result is judged to be " without bamboo silk ".
As preferably, described image vector technical transform method is as follows:
A) first using the initial value of the first row of image array as summation vector;
B) by rear row of image array and current summation addition of vectors, and using the value of its result as new summation vector;
C) repeat previous action, until whole N row of image array are all added in summation vector, vector is now final summation vector;
D) summation vector now reflects the monochrome information of bamboo silk above-below direction.
As preferably, described vectorial identification technique method is as follows:
A) by asking for the mean value of element in vector, by sub-average for two ends dark background pixel removing, namely residual pixel represents the image section of bamboo silk, if the element value of residual pixel is distributed near mean value and brightness value is very low, then show there is not bamboo silk in camera lens viewfinder range; Otherwise then the brightness on the corresponding bamboo silk surface of residual pixel, shows to there is bamboo silk in camera lens viewfinder range;
B) when judging to there is bamboo silk, the vector value of middle element is obtained in the element value of residual pixel, if this value is significantly lower than the vector value of residual pixel value two ends element, then show that bamboo silk image centre position exists blanking bar, to should in the groove of Duan Zhusi reverse side, namely judge that this is bamboo silk reverse side, otherwise, judge that this Duan Zhusi surface is as front.
The invention has the beneficial effects as follows: adopt image recognition technology to reach the pros and cons of noncontact identification bamboo silk, ensure that bamboo silk surface not easily scratches in identification process, improve the quality of bamboo silk, system long service life, simultaneously, adopt the vectorization technology of image procossing and vectorial identification technique, identification accuracy rate is high, overcome bamboo silk existence itself if the defect such as mildew or slight crack is on the impact of identification result.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is secondary light source fixed seat structure schematic diagram.
Fig. 4 is auxiliary ray cast schematic diagram.
Fig. 5 is bamboo silk direct picture.
Fig. 6 is bamboo silk verso images.
Fig. 7 is the bamboo silk direct picture after segmentation.
Fig. 8 is the bamboo silk verso images after segmentation.
1. bamboo silk, 2. groove, 3. base plate, 4. cylinder, 5. clamping device, 6. guide rail, 7. imageing sensor, 8. aperture, 9. supports, 10. light source holder in figure, 11. light sources, 12. narrow slits.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: the contactless bamboo silk pros and cons identification system of the present embodiment, as depicted in figs. 1 and 2, acts on the positive and negative surperficial identification of bamboo silk, the front flat smooth of bamboo silk, and be provided with groove in the middle of reverse side, identification system comprises:
Base plate, in tabular, for installing wire feeder, image collecting device and auxiliary light device;
Wire feeder, for bamboo silk being clamped and delivering to image collecting device place, comprise push-and-pull cylinder, the clamping device be connected with push-and-pull cylinder and guide rail, clamping device is arranged on also can along slide on guide rail, and gripper mechanism grips bamboo silk is parallel to backplate surface and makes bamboo silk pros and cons perpendicular to backplate surface;
Image collecting device, comprise imageing sensor, just to bamboo silk surface, for the surface characteristics collection of bamboo silk is analyzed, imageing sensor comprises the housing of sealing, be arranged on the built-in camera in housing and picture processing chip, housing is designed with the aperture consistent with bamboo silk its clamped height, the camera lens of built-in camera is arranged on aperture place, aperture is designed with transparent glass, built-in camera gathers bamboo silk surface image information by transparent glass and is sent on master controller by data line after picture processing chip process, at aperture, place is also designed with blowning installation, transparent glass in air blowing air-flow alignment apertures,
Secondary light source device, for producing the light and shade lines of sharp contrast on bamboo silk surface, comprise the support be fixed on base plate, the light source holder be connected with cradle top and the light source be placed in light source holder, light source is the LED of white, light source holder is strip cavity body structure, as shown in Figure 3, several LED of line spread are designed with in cavity, cavity bottom has a narrow slit parallel with bamboo silk, the LED light line of point-like forms wire light through narrow slit and projects bamboo silk surface, bamboo silk surface is made to form strong light and shade light belt, light and bamboo silk surface form an incident angle α, as shown in Figure 4, incident angle α is 30 °.
Based on the discrimination method of bamboo silk pros and cons identification system, its step is as follows:
A. bamboo silk clamping device gripping bamboo silk, makes bamboo silk be parallel to backplate surface, and bamboo silk pros and cons is perpendicular to backplate surface;
B. push-and-pull cylinder action, drives clamping device along slide, makes bamboo silk one end enter within the pick-up lens viewfinder range of imageing sensor;
C. master controller sends " identification " instruction by data line to imageing sensor;
D. imageing sensor enters " identification " state, and secondary light source is lit, the picture on imageing sensor built-in camera shooting bamboo silk surface;
E. picture is after image processing algorithm calculates, and imageing sensor identification also judges the pros and cons of bamboo silk;
F. identification result is sent back master controller by data line by imageing sensor;
G. identification completes, and closes secondary light source, and clamping device is retracted original position by push-and-pull cylinder retraction, and clamping device unclamps bamboo silk, completes the identification process of a bamboo silk;
H. repeat A ~ G step, carry out the pros and cons identification of next root bamboo silk.
Image processing algorithm in above-mentioned discrimination method, its flow process is as follows:
A. gather bamboo silk surface image, as shown in Figure 5 or Figure 6, obtaining resolution is the original image that 320 row 240 arrange;
B. adopt image block technology that bamboo silk surface image is longitudinally divided into 10 equal portions, then can obtain 10 block sizes and be the image fritter that 320 row 24 arrange, each image fritter comprises the image information of a bit of bamboo silk;
C. adopt image vector technology the small images that 320 row 24 arrange to be converted into summation vector that length is 320, is equivalent to image fritter to be compressed into the fine rule that 320 row 1 arrange;
D. adopt the every small images of vectorial identification technique identification, obtain the identification result of 10 parts of separate bamboo silk pros and cons;
E. adopt the technology of voting to draw and finally differentiate result.
Image vector technical transform method in above image processing algorithm is as follows:
A) first using the initial value of the first row of image array as summation vector;
B) by rear row of image array and current summation addition of vectors, and using the value of its result as new summation vector;
C) repeat previous action, until whole 24 row of image array are all added in summation vector, vector is now final summation vector;
D) summation vector now reflects the monochrome information of bamboo silk picture above-below direction.
Vectorial identification technique method in above image processing algorithm is as follows:
A) by asking for the mean value of element in vector, by sub-average for two ends dark background pixel removing, namely residual pixel represents the image section of bamboo silk, if the element value of residual pixel is distributed near mean value and brightness value is very low, then show there is not bamboo silk in camera lens viewfinder range; Otherwise then the brightness on the corresponding bamboo silk surface of residual pixel, shows to there is bamboo silk in camera lens viewfinder range;
B) when judging to there is bamboo silk, the vector value of middle element is obtained in the element value of residual pixel, if this value is significantly lower than the vector value of residual pixel value two ends element, then show that bamboo silk image centre position exists blanking bar, to should in the groove of Duan Zhusi reverse side, namely judge that this is bamboo silk reverse side, otherwise, judge that this Duan Zhusi surface is as front.
More than illustrate and not restriction has been done to the present invention; the present invention is also not limited only to the citing of above-mentioned explanation; the change that those skilled in the art make in essential scope of the present invention, retrofit, increase or replace, all should be considered as protection scope of the present invention.
Claims (3)
1. a contactless bamboo silk pros and cons discrimination method, for the positive and negative surperficial identification of bamboo silk of contactless bamboo silk pros and cons identification system, the front flat smooth of described bamboo silk (1), and be provided with groove (2) in the middle of the back side, described identification system comprises:
Base plate (3), in tabular, for installing wire feeder, image collecting device and auxiliary light device; Wire feeder, for bamboo silk being clamped and delivering to image collecting device place, comprise push-and-pull cylinder (4), the clamping device (5) be connected with push-and-pull cylinder and guide rail (6), described clamping device is located at also can along slide on guide rail, and gripper mechanism grips bamboo silk is parallel to base plate and makes bamboo silk pros and cons perpendicular to backplate surface;
Image collecting device, comprise imageing sensor (7), just to bamboo silk surface, for the surface characteristics collection of bamboo silk is analyzed, described imageing sensor comprises housing, be located at built-in camera in housing and picture processing chip, described housing is provided with the aperture (8) consistent with bamboo silk its clamped height, and the camera lens of described built-in camera is located at described aperture place, and the image information that built-in camera collects is sent on master controller by data line after treatment;
Secondary light source device, for producing the light and shade lines of sharp contrast, the light source (11) comprising the support (9) be fixed on base plate, the light source holder (10) be connected with cradle top and be placed in light source holder on bamboo silk surface;
The step of described discrimination method is as follows:
A. bamboo silk clamping device gripping bamboo silk, makes bamboo silk be parallel to base plate, and the positive and negative surface of bamboo silk is perpendicular to backplate surface;
B. push-and-pull cylinder action, drives clamping device along slide, makes bamboo silk one end enter within the pick-up lens viewfinder range of sensor;
C. master controller sends " identification " instruction by data line to imageing sensor;
D. imageing sensor enters " identification " state, and secondary light source is lit, the picture on imageing sensor built-in camera shooting bamboo silk surface;
E. picture is after image processing algorithm calculates, and imageing sensor identification also judges the pros and cons of bamboo silk;
F. identification result is sent back master controller by data line by imageing sensor;
G. identification completes, and closes secondary light source, and clamping device is retracted original position by push-and-pull cylinder retraction, and clamping device unclamps bamboo silk, completes the identification process of a bamboo silk;
The calculation procedure of described image processing algorithm is as follows:
1) gather bamboo silk surface image, obtain the original image that resolution is the capable L row of M;
2) adopt image block technology that bamboo silk surface image is longitudinally divided into K equal portions, then obtain K block size and be the image fritter of the capable N row of M, wherein N=L/K, each image fritter comprises the image information of a bit of bamboo silk;
3) small images that capable for M N arranges is converted into the summation vector that length is M by employing image vector technology;
4) adopt vectorial identification technique to identify every small images respectively, obtain the identification result that K part is separate;
5) adopt the technology of voting to draw and finally differentiate result.
2. one according to claim 1 contactless bamboo silk pros and cons discrimination method, is characterized in that: described image vector technical transform step is as follows:
A) first using the initial value of the first row of small images matrix as summation vector;
B) by rear row of image array and current summation addition of vectors, and using the value of its result as new summation vector;
C) repeat previous action, until whole N row of image array are all added in summation vector, vector is now final summation vector;
D) summation vector now reflects the monochrome information of each small images above-below direction.
3. one according to claim 1 contactless bamboo silk pros and cons discrimination method, is characterized in that: described vectorial identification technique step is as follows:
A) by asking for the mean value of element in vector, by sub-average for two ends dark background pixel removing, namely residual pixel represents the image section of bamboo silk, if the element value of residual pixel is distributed near mean value and brightness value is very low, then show there is not bamboo silk in camera lens viewfinder range; Otherwise then the brightness on the corresponding bamboo silk surface of residual pixel, shows to there is bamboo silk in camera lens viewfinder range;
B) when judging to there is bamboo silk, the vector value of middle element is obtained in the element value of residual pixel, if this value is significantly lower than the vector value of residual pixel value two ends element, then show that bamboo silk image centre position exists blanking bar, to should in the groove of Duan Zhusi reverse side, namely judge that this is bamboo silk reverse side, otherwise, judge that this Duan Zhusi surface is as front.
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| CN104713882B (en) * | 2015-04-07 | 2017-07-18 | 何益明 | Bamboo silk or bamboo chip positive and negative discrimination method and its device |
| CN106017346B (en) * | 2016-05-23 | 2018-10-12 | 浙江大学台州研究院 | Based on machine vision metrology ceramics eyeglass is positive and negative and the method for angle |
| CN110091393B (en) * | 2019-05-17 | 2023-12-08 | 中南林业科技大学 | Automatic identification and overturning equipment for green and yellow surfaces of bamboo strips |
| CN110470217B (en) * | 2019-08-09 | 2021-11-16 | 无锡先导智能装备股份有限公司 | Method for detecting ending state of battery cell |
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| JPH09298632A (en) * | 1996-05-01 | 1997-11-18 | Oki Electric Ind Co Ltd | Image reader |
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| CN202149880U (en) * | 2011-06-13 | 2012-02-22 | 浙江大学 | Contact photoelectric sensor for identifying front face and back face of bamboo filament |
| CN202599366U (en) * | 2012-04-25 | 2012-12-12 | 浙江大学 | Noncontact type identification system for front side and back side of bamboo filament |
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| CN1162112A (en) * | 1995-12-20 | 1997-10-15 | 松下电器产业株式会社 | Recognization device for circuit board and recognization method thereof |
| JPH09298632A (en) * | 1996-05-01 | 1997-11-18 | Oki Electric Ind Co Ltd | Image reader |
| CN201231229Y (en) * | 2008-07-01 | 2009-05-06 | 华中农业大学 | Bamboo-strip automatic recognition and classification device based on machine vision |
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