CN102004913A - Method for detecting transparent plastic impurities in seed cotton - Google Patents
Method for detecting transparent plastic impurities in seed cotton Download PDFInfo
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- CN102004913A CN102004913A CN 201010221178 CN201010221178A CN102004913A CN 102004913 A CN102004913 A CN 102004913A CN 201010221178 CN201010221178 CN 201010221178 CN 201010221178 A CN201010221178 A CN 201010221178A CN 102004913 A CN102004913 A CN 102004913A
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Abstract
The invention relates to a method for detecting and removing transparent plastic impurities in seed cotton, belonging to the technical field of cotton processing machinery and optical detection. The method comprises the following steps of: projecting an LED light source on a polarizer to obtain polarized light; illuminating detected seed cotton containing transparent plastic impurities, such as agricultural mulching films, and the like; realizing free dropping motion on the cotton seed and the impurities by a vertical channel; after changing a polarization state of the polarized light by the transparent plastic impurities, generating interference; after detecting the polarization, obtaining a polarized image with strongest impurity characteristics and imaging on a CCD (Charge Coupled Device) sensor or a camera; after binarizing the image, dividing the image by applying a morphological method; calculating mass center coordinates of the impurities in the image; and by combining the dropping speed of the seed cotton, detecting dynamic coordinates of the impurities in motion, which provides guarantee for a removing mechanism to remove the impurities. The detecting method of the invention has the advantages of simple operation, low detecting cost, rapid and sensitive response and good effect.
Description
Technical field
The present invention relates to the detection method of transparent plastic impurity in a kind of unginned cotton, belong to cotton processing machinery and optical detective technology field.
Background technology
In recent years, in links such as the harvesting of unginned cotton, purchase, processing, mix foreign impurity, particularly sneak into the transparent plastic foreign impurity in the unginned cotton, as agricultural mulching, plastic sheet etc.These foreign impurities not only influence the quality grade of cotton, and bring serious problems to following process.Because the surface and the cotton fiber of transparent plastic foreign matter are very similar, the extremely difficult identification of naked eyes, currently used manual sorting's efficient is low, and labour intensity is big, and it is significant to seek reliable, with low cost, high efficiency white of a kind of technology or transparent foreign matter detecting method.
The method that detects white transparent foreign impurity at present mainly contains following several:
(1) colored CCD scanning imagery method is to detect effect undesirable with minimum transparent impurity of cotton color distinction such as mulch film etc.
(2) X-ray imaging method.This system price costliness, foreign matter resolution is low, promotes comparatively difficulty at home.
(3) infrared thermography.Thermal imaging apparatus costs an arm and a leg, and detection speed is slower, does not have actual promotional value.
(4) ultrasonic imaging method.The imaging viewing field scope is little, and imaging resolution is low, and is undesirable to the detection of small foreign body, is difficult to use in industry spot.
Simultaneously, implement the foreign material detection and reject also quite important in the different phase of cotton processing, if implement, then because the processing of cotton ginning operation causes the foreign material longitudinal fracture in the gined cotton process segment, laterally separately, quantity is multiplied, and becomes tiny fibrous impurity, is difficult to identification and rejecting more, therefore, it should be unginned cotton processing period reasonably the implementation phase.
Summary of the invention
The objective of the invention is to propose the detection method of transparent plastic impurity in a kind of unginned cotton for overcoming the deficiency of prior art.The present invention have detect transparent plastic foreign matter effect obviously, simple structure, characteristics with low cost.
The detection method of transparent plastic impurity in the unginned cotton that the present invention proposes may further comprise the steps:
(1) led light source shines in polaroid or polarized glass, obtain full spectrum polarizing light, the tested unginned cotton that more above-mentioned polarizing light irradiation is contained transparent impurity such as agricultural mulching etc., above-mentioned unginned cotton and impurity are mixed in together realizes the free-falling campaign through a vertical channel, and this polarized light is launched after changing polarization state through transparent plastic impurity;
(2) since the interference that the polarized light of the transparent impurity of irradiated plastics causes after the analyzing of above-mentioned outgoing polarized light, obtain the strongest polarization image of impurity characteristics, and image in ccd sensor or camera;
(3) image binaryzation that above-mentioned ccd sensor or camera are gathered uses morphological method with above-mentioned image segmentation again, and in this binary image, each single transparent impurity is cluster pixel association, and above-mentioned pixel association interconnects in 8 connection scopes.Utilize the pixel edge search to determine impurity place surface area (utilizing Mathematical Morphology Method to realize image segmentation), the mean value of the horizontal ordinate of transparent impurity in unginned cotton and the impurity associating zone after the computed segmentation is as the center-of-mass coordinate of impurity;
(4), determine the dynamic position coordinate in the above-mentioned impurity motion with the falling speed of above-mentioned coordinate information in conjunction with unginned cotton;
(5) rejecting mechanism obtains above-mentioned dynamic position coordinate, and transparent impurity such as above-mentioned mulch film are blown out with a small amount of unginned cotton.
The detection method of transparent plastic foreign matter in the unginned cotton that the present invention proposes, its advantage is: the polarizer by led light source irradiation polaroid or polarized glass are formed obtains polarized light, and tested unginned cotton is carried out transmission.When the transparent plastic foreign impurity occurring in the tested unginned cotton, video-unit is gathered the polarized light chromatic polarization image of this foreign impurity, through after the binary conversion treatment, image appearance is tangible impurity characteristics, and pure unginned cotton image does not show, calculate center-of-mass coordinate after the image segmentation, the falling speed in the passage of whereabouts obtains the open site of nozzle and opens constantly in conjunction with center-of-mass coordinate and unginned cotton.This method has improved the discrimination of foreign impurity in the tested unginned cotton.Compare with existing detection technique, detection method of the present invention is simple to operate, and it is low to detect cost, the method for having now can be difficult to the transparent impurity of detected white and detect, and then reject.
Description of drawings
Fig. 1 implements schematic process flow diagram of the present invention;
Fig. 2 implements structural representation axonometric drawing of the present invention;
Among the figure: 1, LED area array light source; 2, tested unginned cotton; 3, ccd sensor or camera; 4, industrial computer, 5, PLC; 6, image pick-up card; 7, rejecting mechanism; 8, the polarizer; 9, unginned cotton whereabouts passage; 10, analyzer; 11, high-frequency electromagnetic valve and nozzle.Wherein the polarizer 8 and analyzer 10 adopt polaroid or polarized glass
Embodiment
Be described further below in conjunction with the detection and the elimination method of Figure of description transparent plastic impurity in the unginned cotton of the present invention.
Referring to Fig. 1 and Fig. 2, led light source 1 shines in the polarizer 8, obtain polarized light, above-mentioned polarizing light irradiation contains the tested unginned cotton 2 of transparent impurity such as agricultural mulching etc., above-mentioned tested cottonseed 2 is realized free-falling campaigns through a vertical drop passage 9, and this polarized light is outgoing behind the change polarization state during through the transparent impurity in the tested unginned cotton 2;
Because the birefringence that the polarized light of the transparent impurity in the tested unginned cotton 2 of irradiation causes, above-mentioned birefringent polarizing light is after analyzer 10 analyzings, obtain the strongest polarization image of impurity characteristics, and image in ccd sensor or camera 3, this CCD or camera 3 are triggered according to certain frequency by PLC5 or industrial computer 4 and open, and take the every two field picture in the impurity whereabouts in the tested unginned cotton 2;
Gather the image of above-mentioned ccd sensors or camera 3 by being installed on industrial computer 4 interior data collecting cards 6, on industrial computer 4, above-mentioned image binaryzation is handled, use morphological method with above-mentioned image segmentation again, in this binary image, each single transparent impurity is cluster pixel association, and above-mentioned pixel association interconnects in 8 connection scopes.Utilize the pixel edge search to determine impurity place surface area.Calculate the mean value of the horizontal ordinate of transparent impurity in the tested unginned cotton 2, as the center-of-mass coordinate of impurity;
Falling speed in conjunction with above-mentioned impurity center-of-mass coordinate and unginned cotton 2, the dynamic position coordinate that industrial computer 4 obtains in the above-mentioned film movement, this coordinate information is sent to the PLC 5 that is connected with industrial computer 4, PLC 5 is at high-frequency electromagnetic valve and the nozzle 11 installed on the corresponding coordinate control rejecting mechanism 7, and the ejection high pressure draught blows out unginned cotton and impurity 2 from unginned cotton whereabouts passage 9.
Above embodiment is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; various distortion and improvement that the common engineering technical personnel in this area make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (1)
1. the detection method of transparent plastic impurity in the unginned cotton is characterized in that this method may further comprise the steps:
(1) led light source (1) shines in the polarizer (8) that adopts polaroid or polarized glass, obtain polarized light, the tested unginned cotton (2) that more above-mentioned polarizing light irradiation is contained transparent plastic impurity such as agricultural mulching etc., the above-mentioned tested unginned cotton (2) that contains impurity realizes the free-falling campaign through a vertical channel, outgoing behind this polarized light process transparent plastic impurity change polarization state;
(2) to the polarized light of above-mentioned outgoing from tested unginned cotton through adopting analyzer (10) analyzing of polaroid or polarized glass, obtain the strongest polarization image, and image in ccd sensor or camera (3);
(3) image binaryzation that above-mentioned ccd sensor or camera (3) are gathered, use morphological method with above-mentioned image segmentation again, in this binary image, each single transparent plastic impurity is cluster pixel association, above-mentioned pixel association interconnects in 8 connection scopes, utilize the pixel edge search to determine impurity place surface area, calculate the mean value of the horizontal ordinate of transparent plastic impurity in unginned cotton and the impurity association, as the center-of-mass coordinate of impurity;
(4) with the falling speed of above-mentioned coordinate information, thereby detect dynamic position coordinate in the motion of above-mentioned impurity, again contaminant removal is come out in conjunction with above-mentioned impurity barycenter and unginned cotton (2).
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| CN 201010221178 CN102004913A (en) | 2010-06-25 | 2010-06-25 | Method for detecting transparent plastic impurities in seed cotton |
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| CN 201010221178 CN102004913A (en) | 2010-06-25 | 2010-06-25 | Method for detecting transparent plastic impurities in seed cotton |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680481A (en) * | 2012-05-16 | 2012-09-19 | 陕西长岭纺织机电科技有限公司 | Detection method for cotton fiber impurities |
| WO2017076570A1 (en) * | 2015-11-03 | 2017-05-11 | TRüTZSCHLER GMBH & CO. KG | Device for identifying foreign parts during preparation for the spinning process |
| CN107272893A (en) * | 2017-06-05 | 2017-10-20 | 上海大学 | Man-machine interactive system and method based on gesture control non-touch screen |
| CN108284079A (en) * | 2018-02-13 | 2018-07-17 | 南京林业大学 | A kind of unginned cotton residual film sorting unit and algorithm based on high light spectrum image-forming and deep learning |
| CN109738436A (en) * | 2018-12-28 | 2019-05-10 | 安徽财经大学 | A kind of unginned cotton impurity quantifies rapid detection system and method |
| CN113295572A (en) * | 2021-05-20 | 2021-08-24 | 内蒙古农业大学 | Method, device and equipment for collecting residual films of farmland |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680481A (en) * | 2012-05-16 | 2012-09-19 | 陕西长岭纺织机电科技有限公司 | Detection method for cotton fiber impurities |
| CN102680481B (en) * | 2012-05-16 | 2014-05-07 | 陕西长岭纺织机电科技有限公司 | Detection method for cotton fiber impurities |
| WO2017076570A1 (en) * | 2015-11-03 | 2017-05-11 | TRüTZSCHLER GMBH & CO. KG | Device for identifying foreign parts during preparation for the spinning process |
| CN108138384A (en) * | 2015-11-03 | 2018-06-08 | 特吕茨施勒有限及两合公司 | For identifying the equipment of impurity in weaving preparation equipment |
| CN107272893A (en) * | 2017-06-05 | 2017-10-20 | 上海大学 | Man-machine interactive system and method based on gesture control non-touch screen |
| CN108284079A (en) * | 2018-02-13 | 2018-07-17 | 南京林业大学 | A kind of unginned cotton residual film sorting unit and algorithm based on high light spectrum image-forming and deep learning |
| CN109738436A (en) * | 2018-12-28 | 2019-05-10 | 安徽财经大学 | A kind of unginned cotton impurity quantifies rapid detection system and method |
| CN113295572A (en) * | 2021-05-20 | 2021-08-24 | 内蒙古农业大学 | Method, device and equipment for collecting residual films of farmland |
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Application publication date: 20110406 |