CN1214233C - Method and apparatus for measuring yarn section shape - Google Patents
Method and apparatus for measuring yarn section shape Download PDFInfo
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- CN1214233C CN1214233C CN 03114534 CN03114534A CN1214233C CN 1214233 C CN1214233 C CN 1214233C CN 03114534 CN03114534 CN 03114534 CN 03114534 A CN03114534 A CN 03114534A CN 1214233 C CN1214233 C CN 1214233C
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Abstract
The present invention relates to a method for measuring the cross section shapes of yarn. The method comprises: two collimated light sources which have a certain included angle project two sides of the yarn; an optical imaging system magnifies the projection a plurality of times and forms an image of the projection on the wave front of two CCD cameras with a certain included angle; the CCD cameras are integrated for a certain time, and therefore, the width of the projection of one segment of the yarn is converted into pulse signals of the corresponding width; the pulse signals are transmitted to a data acquisition counting plate, and the width of signal pulse is calculated; after a main processor collects numerical values, the width of the actual projection of the measured yarn is obtained by calculation; the yarn is continuously drawn by a driving system, and the system can detect the projection width of the yarn in two directions from one segment to next segment, calculate the equivalent diameter of the yarn, and determine the cross section characters of the yarn. The present invention simultaneously provides a yarn appearance testing instrument using the method.
Description
Technical field
The invention belongs to the electronic device of measuring yarn appearance in the textile industry and predicting fabric quality.
Technical background
In textile industry, the thickness of yarn degree of uniformity is an important indicator of weighing the yarn grade, and the instrument of measurement thickness of yarn uniformity coefficient commonly used is the dried instrument of bar that adopts the capacitance detecting principle both at home and abroad at present, and it can measure the irregular degree of line density of yarn.Yet, adopt this method often to run into the situation that measurement result and actual visual effect are not inconsistent, promptly to do index better for the bar that records with the dried instrument of electric capacity bar, and fabric can not meet the demands.Many textile enterprise still adopt the auxiliary differentiation of the method yarn grade of reeling line blackboard, to improve the quality of fabric.Because factors such as limited, the artificial subjective influence of sampling amount cause and can not objectively respond actual conditions.
Also there is the yarn appearance detecting instrument of the employing optical principle of more external company's exploitations to adopt the single channel measuring method usually, promptly only measures the appearance informations such as diameter of a direction of yarn.And yarn is not standard cylinder usually, in fact presents irregularly shapedly, and xsect more is similar to ellipse, so folk prescription can not reflect yarn faults to measuring accurately, comprehensively.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art part, at the reality in the yarn measurement, proposes a kind of method of more accurate measurement yarn shape, designs a kind of measuring equipment that can accurately, comprehensively reflect yarn faults simultaneously.Specifically, a kind of method of measuring the yarn cross section shape, it at first passes through two collimated light sources that constitute certain angles with two side projections of yarn, through optical imaging system several times are amplified in projection and image in two CCD camera fronts that constitute certain angle, the CCD camera is through the integration of certain hour, the projection width of one section yarn is converted into the pulse signal of corresponding width, delivering to the data acquisition tally calculates signal pulse width, after master processor is gathered numerical value, can draw the actual projection width of tested yarn as calculated, yarn is under the continuous traction of kinematic train, system can measure the projection width of the both direction of yarn piecemeal, calculate the yarn equivalent diameter, determine the yarn cross section feature.
Utilize master processor by calculating average equivalent diameter, coefficient of variation CV value, each grade fault value, wave spectrogram, the irregular curve map that can draw whole tested yarn, according to yarn diameter digital simulation yarn blackboard, emulating fabric effect.
Angle between two collimated light sources and two the CCD cameras is the right angle.
A kind of device of measuring the yarn cross section shape has tenslator, collimated light source, imaging system, CCD camera, camera control panel, data acquisition tally, master processor, several major parts of yarn trailer system; It is characterized in that collimated light source be two-way and between the two structure in an angle, the CCD camera corresponding with collimated light source also is two and an angle arranged between the two.
The two-way that detection system adopts is measured the projection width of measuring two vertical direction of yarn simultaneously.
The present invention adopts two-way to measure, and equivalent diameter calculates in the projection width of measuring two vertical direction of yarn simultaneously, determines the yarn cross section feature.Has following technique effect: a) adopt the yarn appearance measuring and analysing meter of this patent to adopt two-way to measure, measure the cross-sectional width of two vertical direction of yarn simultaneously, can provide yarn shape index.B) can measure cotton, hair, fiber crops and scribbled, be specially adapted to contain the conductive fiber yarn.C) adopt the high-speed CCD line scan camera, when yarn moved with 100 meters/minute speed, the CCD camera was measured a diameter for per 0.5 millimeter to yarn.D) calculate yarn diameter mean value, coefficient of variation CV value, variation one length curve.E) statistics yarn defect numbers at different levels.F) calculate wave spectrogram.G) the irregular curve map of yarn diameter that can draw immediately in measuring.H) simulation yarn blackboard.I) emulating fabric effect.
Description of drawings
Fig. 1 is for adopting the yarn appearance measuring and analysing meter theory diagram of this method.
Fig. 2 is the detection system synoptic diagram of yarn appearance measuring and analysing meter.
Embodiment
A kind of method of measuring the yarn cross section shape, be at first to pass through two collimated light sources that constitute certain angles with two side projections of yarn, through optical imaging system several times are amplified in projection and image in two CCD camera fronts that constitute certain angle, the CCD camera is through the integration of certain hour, averaging projection's width of one section yarn is converted into the pulse signal of corresponding width, delivering to the data acquisition tally calculates signal pulse width, after master processor is gathered numerical value, can draw the actual projection of tested yarn as calculated, yarn is under the continuous traction of kinematic train, and system can measure the projection width of the both direction of yarn piecemeal.Utilize master processor by calculating average equivalent diameter, coefficient of variation CV value, each grade fault value, wave spectrogram, the irregular curve map that can draw whole tested yarn, according to yarn equivalent diameter digital simulation yarn blackboard, emulating fabric effect.Angle between two collimated light sources and two the CCD cameras is the right angle.
A kind of device of measuring the yarn cross section shape has tenslator, collimated light source, imaging system, CCD camera, camera control panel, data acquisition tally, master processor, several major parts of yarn trailer system; Collimated light source be two-way and between the two structure in an angle, the CCD camera corresponding with collimated light source also is two and an angle arranged between the two.The two-way that detection system adopts is measured the projection width of measuring two vertical direction of yarn simultaneously.
Claims (5)
1, a kind of method of measuring the yarn cross section shape, it is characterized in that at first passing through two collimated light sources that constitute certain angles with two side projections of yarn, through optical imaging system several times are amplified in projection and image in two CCD camera fronts that constitute certain angle, the CCD camera is through the integration of certain hour, averaging projection's width of one section yarn is converted into the pulse signal of corresponding width, delivering to the data acquisition tally calculates signal pulse width, after master processor is gathered numerical value, can draw the actual projection width of tested yarn as calculated, yarn is under the continuous traction of kinematic train, system can measure the projection width of the both direction of yarn piecemeal, calculate the yarn equivalent diameter, determine the yarn cross section feature.
2, the method for measurement yarn cross section shape according to claim 1, it is characterized in that utilizing master processor by calculating average equivalent diameter, the coefficient of variation, each grade fault value, wave spectrogram, the inhomogeneous curve map that can draw whole tested yarn, according to yarn diameter digital simulation yarn blackboard, emulating fabric effect.
3,, it is characterized in that the angle between two collimated light sources and two the CCD cameras is the right angle according to the method for claim 1,2 described measurement yarn cross section shapes.
4, a kind of device of measuring the yarn cross section shape has tenslator, collimated light source, imaging system, CCD camera, camera control panel, data acquisition tally, master processor, several major parts of yarn trailer system; It is characterized in that collimated light source be two-way and between the two structure in an angle, the CCD camera corresponding with collimated light source also is two and an angle arranged between the two.
5, the device of measurement yarn cross section shape according to claim 4 is characterized in that the two-way of detection system employing is measured the projection width of measuring two vertical direction of yarn simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114534 CN1214233C (en) | 2003-03-11 | 2003-03-11 | Method and apparatus for measuring yarn section shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114534 CN1214233C (en) | 2003-03-11 | 2003-03-11 | Method and apparatus for measuring yarn section shape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1530631A CN1530631A (en) | 2004-09-22 |
| CN1214233C true CN1214233C (en) | 2005-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03114534 Expired - Fee Related CN1214233C (en) | 2003-03-11 | 2003-03-11 | Method and apparatus for measuring yarn section shape |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445974B (en) * | 2008-12-19 | 2011-04-27 | 清华大学 | Real-time sorting device for foreign fibers in ginned cotton |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102864537B (en) * | 2012-01-05 | 2014-09-17 | 杭州电子科技大学 | Realization method of programmable controller integrating yarn cleaning and yarn breaking detection |
| DE102012102576A1 (en) | 2012-03-26 | 2013-09-26 | Maschinenfabrik Rieter Ag | Method for yarn monitoring |
| CZ2013450A3 (en) * | 2013-06-12 | 2014-02-12 | Rieter Cz S.R.O. | Method of monitoring linear formation and apparatus for making the same |
| CN105421012B (en) * | 2015-11-03 | 2017-10-24 | 顾金华 | The automatic pattern adjustment method of fabric based on machine vision |
| CN105256420A (en) * | 2015-11-30 | 2016-01-20 | 天津仁众人机械自动化技术有限公司 | Online monitoring device of flyer frame |
| CN106226314B (en) * | 2016-07-28 | 2018-09-07 | 中国纺织科学研究院 | Yarn evenness measurement method based on yarn cross section perimeter |
| CN106012472B (en) * | 2016-07-28 | 2018-06-26 | 中国纺织科学研究院 | Yarn evenness measuring system based on yarn cross section perimeter |
| CN106289069B (en) * | 2016-07-28 | 2018-10-19 | 中国纺织科学研究院 | Fabric quality evaluation method based on yarn cross section perimeter bar evenness |
| CN112748154B (en) * | 2020-09-15 | 2023-05-16 | 湖南工程学院 | Device and method for detecting specification parameters of elastic bunchy yarn |
-
2003
- 2003-03-11 CN CN 03114534 patent/CN1214233C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445974B (en) * | 2008-12-19 | 2011-04-27 | 清华大学 | Real-time sorting device for foreign fibers in ginned cotton |
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| CN1530631A (en) | 2004-09-22 |
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