CN104297250A - Yarn hairiness detection device - Google Patents
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- CN104297250A CN104297250A CN201410557070.7A CN201410557070A CN104297250A CN 104297250 A CN104297250 A CN 104297250A CN 201410557070 A CN201410557070 A CN 201410557070A CN 104297250 A CN104297250 A CN 104297250A
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Abstract
The invention discloses a yarn hairiness detection device. The yarn hairiness detection device comprises a yarn conveying device, a yarn image acquisition device and a yarn image processing device, wherein the yarn image acquisition device comprises an image acquisition chamber and an area-array camera and a stroboscopic face light source which are arranged in the image acquisition chamber; an amplification lens is arranged in front of the area-array camera; the area-array camera and the stroboscopic face light source are oppositely arranged on the two sides of the image acquisition chamber; through holes are symmetrically formed in the other two sides of the image acquisition chamber; yarns penetrate through the through holes and are output by a power leather roller, and the conveying direction of the yarns in the image acquisition chamber is vertical to the amplification lens; and the area-array camera is in data connection with the yarn image processing device. By virtue of the yarn hairiness detection device disclosed by the invention, an image processing process can be simplified, and the yarn image acquisition efficiency and the hairiness detection efficiency are improved.
Description
Technical field
The present invention relates to Yarn filoplume detection technique field, particularly a kind of Yarn filoplume pick-up unit.
Background technology
Filoplume, as one of important indicator evaluating yarn qualities, not only affects yarn qualities, also produces harmful effect to follow-up processing of weaving simultaneously.The hairiness index of conventional Yarn filoplume evaluation index hairiness pen feather number distribution and filoplume H value two kinds.Hairiness index is that the filoplume radical under employing different set length is described (it is defined as in unit length, and in single side face, extension elongation exceedes the filoplume radical accumulative total of certain preseting length, and unit is root/rice) Yarn filoplume; The reflection of filoplume H value be filoplume total amount on the tested yarn of unit length (it is defined as the total length of fiber outstanding in the long tested scope of 1cm).With regard to the directive significance for production run, hairiness index characterizes the detrimental extent distribution situation of Yarn filoplume more intuitively than filoplume H value, but describing method is comparatively complicated, lacks the evaluation index of filoplume easily more directly perceived at present.Existing national standard adopts hairiness index to be primary evaluation index.
The method of existing photoelectric sensor detection filoplume also exists testing result and is difficult to reappear, the defects such as filoplume information acquisition is comprehensive not.Therefore, filoplume detects needs to do to explore further in Signal acquiring and processing.Along with the development of acquisition technology and computer technology, digital image processing techniques are also progressively applied to during Yarn filoplume detects, thus improve the comprehensive and accuracy that filoplume detects.The yarn image-pickup method of current collection has blackboard scan method and videomicroscopy method, and wherein blackboard scan method blackboard produces compressing to filoplume and causes filoplume state distortion, and filoplume metrical error is larger; And videomicroscopy method, gather the image under yarn state of nature, obtain yarn material picture, filoplume accuracy in detection is higher, but existence is difficult to focusing, and picking rate is slow, can not complete the collection of Yarn filoplume image within a short period of time.
Chinese patent CN103018249A discloses a kind of image variants system detected for Yarn filoplume, it comprises the controlled yarn transmitting device of speed, yarn image collecting device and yarn image processing system, wherein yarn image collecting device adopts line-scan digital camera to gather figure warp thread picture and is then transferred to image processing system, but linear array CCD image Processing Algorithm more complicated, and adopt line-scan digital camera acquisition two dimensional image to be equipped with scanning motion, simultaneously in order to determine the correspondence position of each pixel of image on measured piece, also need the coordinate being equipped with each scan line of grating device call wire array camera, cause image acquisition time long like this, measurement efficiency is low, line array CCD is scanning imagery, and in imaging process, filoplume is due to motion, and its form can change, then filoplume imaging meeting distortion, affect testing result, the line-scan digital camera depth of field is little in addition, acquisition filoplume is limited, and from practical engineering application angle, linear array camera image Processing Algorithm relative complex.
Summary of the invention
The object of the invention is to provide a kind of Yarn filoplume pick-up unit, which solve collection and the real-time processing problem of the yarn enlarged image in the detection of Yarn filoplume image, adopting area array cameras to gather yarn enlarged image can the process of simplified image process, improves the efficiency that the efficiency of yarn image acquisition and filoplume detect.
Based on the problems referred to above, technical scheme provided by the invention is:
A kind of Yarn filoplume pick-up unit, comprise yarn transmitting device, yarn image collecting device and yarn image processing apparatus, described yarn transmitting device comprises twizzle, tension controller, yarn guiding wheel and power roller, described power roller side arranges drive motor, described yarn image processing apparatus comprises image storage unit and Yarn filoplume detecting unit, described yarn image collecting device comprises image acquisition room and is arranged on area array cameras and the stroboscopic area source of described image acquisition indoor, before described area array cameras, enlarging lens is set, described area array cameras and described stroboscopic area source are oppositely arranged on the both sides of described image acquisition room, the another symmetria bilateralis of described image acquisition room is provided with through hole, yarn through described through hole through described power roller export and its transmission direction in described image acquisition indoor and described enlarging lens perpendicular, described area array cameras and described yarn image processing apparatus data cube computation.
Further, described yarn image processing apparatus also comprises prewarning unit, and described prewarning unit is connected with described image storage unit signal.
Further, the sample frequency of described area array cameras is consistent with the strobing frequency of described stroboscopic area source.
Further, the strobing frequency of the conduction of velocity of described yarn transmitting device and the sample frequency of described area array cameras and described stroboscopic area source matches.
Further, the background image that the white background area source image that described yarn image processing apparatus adopts described area array cameras to collect detects as filoplume, and upgrade background image elimination dust, willow catkins flying in the air to the impact of Yarn filoplume accuracy of detection by the method for Gaussian Background modeling.
Further, described yarn image processing apparatus detects yarn evenness boundary curve as Yarn filoplume length detection datum line by edge detection method.
Further, described yarn image processing apparatus is by the amount of dust in background subtraction detection faces array camera field range, and when amount of dust reaches early warning value, described prewarning unit carries out early warning; Detect by carrying out focusing based on the method for boundary gradient, when in the image collected, the focusing of yarn main body is inaccurate, described prewarning unit carries out early warning.
Compared with prior art, advantage of the present invention is:
1, the present invention adopts area array cameras to carry out image acquisition, whole frame instantaneous imaging, and the filoplume form in field coverage is undistorted, and the present invention selects large depth of field camera lens, and obtain filoplume information more comprehensive, Processing Algorithm is also relatively simple.
2, have employed the Yarn filoplume visible detection method based on background, add the stroboscopic background surfaces light source of modulation, meet and detect required brightness requirement and reduce the interference of surround lighting to image acquisition.
3, on image-pickup method, the present invention makes the stroboscopic of background light source synchronous with area array cameras image acquisition, and area array cameras image acquisition speed matches with the yarn conduction of velocity in detection all the time, realize figure warp thread as complete with break-even collection, solve in existing visible detection method with this and there is problem that is undetected or duplicate detection.
4, in detection method, the present invention carries out Yarn filoplume detection using the dry boundary curve of figure warp thread picture bar as floating reference line, avoids in existing method testing process because of Yarn filoplume length-measuring error that yarn shake or the factor such as mechanical vibration cause.
5, the present invention also arranges prewarning unit at image processing apparatus, carries out early warning when area array cameras visual field amount of dust reaches early warning value or yarn image focus, to improve the degree of accuracy gathering image.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of Yarn filoplume pick-up unit of the embodiment of the present invention;
Wherein: 1, spool; 2, twizzle; 3, tension controller; 4, yarn; 5, yarn guiding wheel; 6, stroboscopic area source; 7, image acquisition room; 71, through hole; 8, area array cameras; 9, enlarging lens, 10, power roller.
Embodiment
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiments are not limited to for illustration of the present invention limit the scope of the invention.The implementation condition adopted in embodiment can do further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment.
See Fig. 1, for the structural representation of the embodiment of the present invention, a kind of Yarn filoplume pick-up unit is provided, for the collection of Yarn filoplume enlarged image and the process of successive image, it comprises yarn transmitting device, yarn image collecting device and yarn image processing apparatus, wherein yarn transmitting device comprises yarn guide, twizzle 2, tension controller 3, yarn guiding wheel 5 and power roller 10, twizzle 2, tension controller 3, yarn guiding wheel 5 is arranged on yarn guide, yarn 4 on spool 1 is through twizzle 2, be wrapped on yarn guiding wheel 5 after tension controller 3, export through power roller 10 after warp yarn image collecting device, the side of power roller 10 is provided with drive motor, this drive motor can select servomotor or stepper motor, drive motor drives power roller 10 thus transmits yarn 4.
Yarn image collecting device comprises image acquisition room 7 and the area array cameras 8 that is arranged in described image acquisition room 7 and stroboscopic area source 6, this yarn image collecting device modular design, be convenient to be applied to different systems, and conveniently carry out changing and safeguarding, enlarging lens 9 is set before area array cameras 8, this enlarging lens 9 is large depth of field camera lens, in order to avoid surround lighting is to the interference of yarn image acquisition, image acquisition room 7 is the darkroom isolated with external light source, area array cameras 8 and stroboscopic area source 6 are oppositely arranged on the both sides of image acquisition room 7, and its another symmetria bilateralis is provided with two through holes 71, yarn 4 exports through power roller 10 through after this through hole 71, the position of yarn 4 in image acquisition room 7 between area array cameras 8 and stroboscopic area source 6 and its transmission direction and area array cameras 8 perpendicular, the image acquisition of the yarn 4 in transmission can be got off by the cooperation of such area array cameras 8 and enlarging lens 9, and the strobing frequency of stroboscopic area source 6 is consistent with the sample frequency of area array cameras 7.
Above-mentioned area array cameras 8 and yarn image processing apparatus data cube computation, the yarn enlarged image that such area array cameras 8 gathers transfers to the image storage unit of yarn image processing apparatus, image storage unit support calls to storage figure picture the reproduction realizing testing result, demonstration, follow-up warp yarn filoplume detecting unit carries out filoplume detection to the yarn enlarged image in image storage unit, the background image that the white background area source image that Yarn filoplume detecting unit adopts area array cameras 8 to collect herein detects as filoplume, and upgrade background image elimination dust by the method for Gaussian Background modeling, willow catkins flying in the air are on the impact of Yarn filoplume accuracy of detection, the yarn evenness edge adopting edge detection method method to obtain is that floating reference carries out filoplume detection to yarn, avoids in existing method testing process because of Yarn filoplume length-measuring error that the factors such as yarn shake or mechanical vibration cause.
The precision of image is collected in order to improve yarn enlarged image collecting unit, yarn image processing apparatus is also provided with prewarning unit, prewarning unit is connected with image storage unit signal, prewarning unit, by the amount of dust in background subtraction detection faces array camera field range, carries out early warning when amount of dust reaches early warning value; Detect by carrying out focusing based on the method for boundary gradient, carry out early warning when the focusing of yarn main body is inaccurate in the image collected.
In order to improve beneficial effect of the present invention further, the conduction of velocity of yarn transmitting device should match with the strobing frequency of the sample frequency of area array cameras 8 and stroboscopic area source 6, to guarantee that image that yarn image collecting device collects is complete and there is no redundancy, adopt that embedded type control module realizes the synchronous triggering of aforementioned area array cameras frequency acquisition and foregoing background area source strobing frequency, yarn transmission speed is mated with aforementioned area array cameras frequency acquisition, gather as complete, irredundant to complete figure warp thread.
Yarn image processing apparatus is also provided with standard gauge block unit in order to automatic calibration image and proportionate relationship in kind simultaneously.
Principle of work of the present invention is: yarn is after unwinding spool, and the area array cameras visual field with enlarging lens is stably passed through with constant-tension in the yarn road that twizzle and yarn guiding wheel are formed, and the power roller driven finally by drive motor exports.Yarn is through image collecting device, area array cameras and stroboscopic background surfaces light source synchronous trigger, make the yarn image background brightness collected meet testing requirement, area array cameras trigger rate matches with current yarn guiding speed, realizes figure warp thread and gathers as complete, irredundant.Because background light source adopts modulated light source, thus the adverse effect of surround lighting to yarn image acquisition effectively can be reduced.
In sum, the present invention compared with prior art has following beneficial effect: adopting area array cameras to gather yarn enlarged image can the process of simplified image process, improve the efficiency of yarn image acquisition and the efficiency of filoplume detection, adopt the cooperation of image acquisition room and stroboscopic area source can reduce the interference of surround lighting to image acquisition simultaneously, the precision of image acquisition can be improved, the modular design of yarn image collecting device, conveniently carries out changing and safeguarding; On image-pickup method, the present invention makes the stroboscopic of background light source synchronous with area array cameras image acquisition, and area array cameras image acquisition speed matches with the yarn conduction of velocity in detection all the time, realize figure warp thread as complete with break-even collection, solve in existing visible detection method with this and there is problem that is undetected or duplicate detection; In detection method, the present invention carries out Yarn filoplume detection using the dry boundary curve of figure warp thread picture bar as floating reference line, avoids in existing method testing process because of Yarn filoplume length-measuring error that yarn shake or the factor such as mechanical vibration cause; Prewarning unit is set at image processing apparatus, carries out early warning when area array cameras visual field amount of dust reaches early warning value or yarn image focus, to improve the degree of accuracy gathering image.
Above-mentioned example, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations of doing according to Spirit Essence of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (7)
1. a Yarn filoplume pick-up unit, comprise yarn transmitting device, yarn image collecting device and yarn image processing apparatus, described yarn transmitting device comprises yarn guide, twizzle (2), tension controller (3), yarn guiding wheel (5) and power roller (10), described power roller (10) side arranges drive motor, described yarn image processing apparatus comprises image storage unit and Yarn filoplume detecting unit, it is characterized in that: described yarn image collecting device comprises image acquisition room (7) and the area array cameras (8) that is arranged in described image acquisition room (7) and stroboscopic area source (6), described area array cameras (8) is front arranges enlarging lens (9), described area array cameras (8) and described stroboscopic area source (6) are oppositely arranged on the both sides of described image acquisition room (7), the another symmetria bilateralis of described image acquisition room (7) is provided with through hole (71), yarn (4) through described through hole (71) through described power roller (10) export and its transmission direction in described image acquisition room (7) and described enlarging lens (9) perpendicular, described area array cameras (8) and described yarn image processing apparatus data cube computation.
2. Yarn filoplume pick-up unit according to claim 1, is characterized in that: described yarn image processing apparatus also comprises prewarning unit, and described prewarning unit is connected with described image storage unit signal.
3. Yarn filoplume pick-up unit according to claim 2, is characterized in that: the sample frequency of described area array cameras (8) is consistent with the strobing frequency of described stroboscopic area source (6).
4. Yarn filoplume pick-up unit according to claim 3, is characterized in that: the strobing frequency of the conduction of velocity of described yarn transmitting device and the sample frequency of described area array cameras (8) and described stroboscopic area source (6) matches.
5. Yarn filoplume pick-up unit according to claim 1, it is characterized in that: the background image that the white background area source image that described yarn image processing apparatus adopts described area array cameras (8) to collect detects as filoplume, and upgrade background image elimination dust, willow catkins flying in the air to the impact of Yarn filoplume accuracy of detection by the method for Gaussian Background modeling.
6. Yarn filoplume pick-up unit according to claim 1, is characterized in that: described yarn image processing apparatus detects yarn evenness boundary curve as Yarn filoplume length detection datum line by edge detection method.
7. Yarn filoplume pick-up unit according to claim 2, is characterized in that: described yarn image processing apparatus is by the amount of dust in background subtraction detection faces array camera field range, and when amount of dust reaches early warning value, described prewarning unit carries out early warning; Detect by carrying out focusing based on the method for boundary gradient, when in the image collected, the focusing of yarn main body is inaccurate, described prewarning unit carries out early warning.
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| CN201410557070.7A CN104297250A (en) | 2014-10-20 | 2014-10-20 | Yarn hairiness detection device |
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| CN201410557070.7A CN104297250A (en) | 2014-10-20 | 2014-10-20 | Yarn hairiness detection device |
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Cited By (6)
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| CN104849275A (en) * | 2015-04-22 | 2015-08-19 | 上海工程技术大学 | High speed digital imaging device and method for yarn appearance |
| CN106525846A (en) * | 2016-11-01 | 2017-03-22 | 河北汇金机电股份有限公司 | Full-automatic fabric hairness tester |
| CN109712120A (en) * | 2018-12-13 | 2019-05-03 | 哈尔滨理工大学 | A kind of Yarn filoplume defect inspection method based on image procossing |
| CN109799190A (en) * | 2019-03-19 | 2019-05-24 | 莱州市电子仪器有限公司 | Gas flow optimized sealing mechanism and Yarn filoplume detection method based on the mechanism |
| CN111257333A (en) * | 2020-03-19 | 2020-06-09 | 西安获德图像技术有限公司 | Machine vision-based carbon fiber quality online detection device and method |
| CN117214199A (en) * | 2023-11-08 | 2023-12-12 | 张家港扬子纺纱有限公司 | Yarn hairiness detection device and detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849275A (en) * | 2015-04-22 | 2015-08-19 | 上海工程技术大学 | High speed digital imaging device and method for yarn appearance |
| CN106525846A (en) * | 2016-11-01 | 2017-03-22 | 河北汇金机电股份有限公司 | Full-automatic fabric hairness tester |
| CN106525846B (en) * | 2016-11-01 | 2019-05-03 | 河北汇金机电股份有限公司 | A kind of full-automatic textile fabric filoplume tester |
| CN109712120A (en) * | 2018-12-13 | 2019-05-03 | 哈尔滨理工大学 | A kind of Yarn filoplume defect inspection method based on image procossing |
| CN109799190A (en) * | 2019-03-19 | 2019-05-24 | 莱州市电子仪器有限公司 | Gas flow optimized sealing mechanism and Yarn filoplume detection method based on the mechanism |
| CN109799190B (en) * | 2019-03-19 | 2024-02-06 | 莱州市电子仪器有限公司 | Air flow control sealing mechanism and yarn hairiness detection method based on same |
| CN111257333A (en) * | 2020-03-19 | 2020-06-09 | 西安获德图像技术有限公司 | Machine vision-based carbon fiber quality online detection device and method |
| CN117214199A (en) * | 2023-11-08 | 2023-12-12 | 张家港扬子纺纱有限公司 | Yarn hairiness detection device and detection system |
| CN117214199B (en) * | 2023-11-08 | 2024-02-09 | 张家港扬子纺纱有限公司 | Yarn hairiness detection device and detection system |
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