CN1462879A - Method and system for measuring qaulity of multi component yarns - Google Patents
Method and system for measuring qaulity of multi component yarns Download PDFInfo
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- CN1462879A CN1462879A CN 03129518 CN03129518A CN1462879A CN 1462879 A CN1462879 A CN 1462879A CN 03129518 CN03129518 CN 03129518 CN 03129518 A CN03129518 A CN 03129518A CN 1462879 A CN1462879 A CN 1462879A
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Abstract
A system for measuring the quality of multi-element yarn has a constant tension unit and a constant speed unit. Its measuring method includes putting a yarn in a detecting area where the are photoelectric detector and capactance detector respectively connected to computer, emitting infrared light by photoelectric detector to project the profile of said yarn to infrared receiving tube, A/D conversion, sending digital signals to computer, and data processing by computer to obtain different quality parameters.
Description
Technical field:
The present invention relates to the quality of capacitance method Measuring Object, the formation and the variation of composition, relate to diameter and variation when adopting optical means metering movement of objects again, is a kind of method and system that detects polynary yarn quality.
Background technology:
The condenser type bar dry measure instrument of Switzerland Uster company has been widely used in the yarn diameter of cotton spinning industry and has measured, and the wave spectrogram that calculates therefrom is used to instruct the production of yarn.The theoretical foundation of this method is so-called " mass conservation principle ", and promptly when the yarn qualities of the unit length between the capacitor two-plate was invariable, measured capacitance also remained unchanged, thereby the diameter of extrapolating yarn is constant.Yet this measuring method has its intrinsic defective:
1, when having some cotton knot in the yarn, the apparent diameter of yarn can not change, and marked change may take place its capacitance, thus the result who leads to errors.
2, the fiber that in cotton thread, is mingled with other kinds, during as fibers such as polypropylene fibre, acrylic fibers, the apparent diameter of yarn can not change, but because the specific inductive capacity of impurity fiber is different from yarn, marked change may take place in the capacitance that at this moment records, the measurement result that this also can lead to errors.
3, for the yarn of blending, because the unevenness of mixing, specific inductive capacity is also different everywhere, measures less than correct yarn diameter and changing value thereof with condenser type bar dry measure instrument.
The electronic blackboard of U.S. Lawson-Hemphill company adopts the visible light behind the collimation that the profile of tested yarn is projected on the line array CCD measuring the diameter and the variation thereof of yarn, thus the cloth cover computer simulation after yarn carried out ranking and be made into cloth.The said firm is in patent of invention (publication number: CN1174607A, open day: on February 25th, 1998), be entitled as " system and method that is used for electronically displaying yarn qualities " of China's application.The weak point of this measuring method is:
1, adopts high speed linear array CCD camera, complex circuit, overall price costliness.
2, because the surface of yarn is a diffuse reflector, the visible light that adopts direct current supply is as light source, and the result of measurement is subject to the interference of extraneous parasitic light.
The composition distribution ratio and the proportioning irregularity thereof that 3, can not reflect scribbled.
Summary of the invention:
The technical problem to be solved in the present invention provides a kind of method and system that detects polynary yarn quality.
The technical scheme that the present invention solves its technical matters employing is:
A kind of system of measuring polynary yarn quality, comprise constant tension device and constant airspeed device, yarn places surveyed area, be provided with photoelectric detection system and capacitance detecting device in this surveyed area, and be connected to the computing machine that is provided with signal handler by computer interface respectively, it is characterized in that: this photoelectric detection system is the infrared light supply through the current drives unit drives, the infrared light of its emission is behind the optical system collimation, the profile of tested polynary yarn is projected on the infrared light receiving tube, and convert digital signal to through D/A, be transferred to computing machine by computer interface.
The infrared light supply of this photoelectric detection system is made up of crystal oscillator, driver element, infraluminescence pipe, infrared receiving tube and frequency-selecting amplification and detection unit, the infraluminescence pipe is by the AC driving unit drives of crystal oscillator excitation, the light signal that infrared receiving tube receives is behind frequency-selecting amplification and detection unit, the drive current of control AC driving unit output makes the infrared light power of infraluminescence pipe emission keep constant; The infrared light of infraluminescence pipe emission is behind the optical system collimation, the profile of tested polynary yarn is projected on the infrared receiving tube, the electric signal of infrared receiving tube output converts digital signal to through A/D converter behind frequency-selecting amplification and detection unit, be transferred to computing machine by computer interface; Simultaneously, the light signal that infrared receiving tube receives also is transferred to computing machine by computer interface after frequency-selecting amplification and detection unit and A/D converter convert digital signal to.
The infrared light supply of this photoelectric detection system is made up of driver element, infraluminescence pipe, infrared receiving tube and amplifying unit, the infraluminescence pipe is by the direct drive unit drives, the light signal that infrared receiving tube receives is behind amplifying unit, the drive current of control direct drive unit output makes the infrared light power of infraluminescence pipe emission keep constant; The infrared light of infraluminescence pipe emission is behind the optical system collimation, the profile of tested polynary yarn is projected on the infrared receiving tube, the electric signal of infrared receiving tube output converts digital signal to through A/D converter behind frequency-selecting amplification and detection unit, be transferred to computing machine by computer interface; Simultaneously, the light signal that infrared receiving tube receives also is transferred to computing machine by computer interface after amplifying unit and A/D converter convert digital signal to.
This capacitance detecting device is on the pole plate of high-frequency signal through being added to plate condenser behind the driver element of its crystal oscillator output; The polynary yarn that is in constant-tension and constant speed state passes between the two-plate of plate condenser, make the capacitance of plate condenser change, thereby the phase place of the high-frequency signal that causes changes thereupon, the high-frequency signal of phase change and the base reference signal while input phase difference detecting unit of driver element output take place, its output is transformed into digital signal through A/D converter, is transferred to computing machine by computer interface then.
A kind of method of utilizing the polynary yarn quality of measurement of said system is characterized in that: the yarn that will keep setting tension force and setting linear velocity places surveyed area, carries out following steps:
1. Photoelectric Detection: the infrared light supply that drives through direct current or exchange current, the infrared light of its emission is behind the optical system collimation, the profile of tested polynary yarn is projected on the infrared photoelectric sensor, gather the yarn diameter change information of uniform motion by infrared photoelectric sensor;
2. capacitance detecting: in the high frequency alternating electric field, obtain the capacitance information relevant with proportioning with the diameter of polynary yarn by capacitance detecting device;
3. signal Processing: computing machine will from electro-optical pickoff and test using capacitance sensor to the quality signals of polynary yarn carry out data processing, export the line footpath of polynary yarn and line footpath irregularity thereof, composition proportion with and metric attributes such as proportioning irregularity, impurity, fault, slubbing, details, cotton knot, and variation curve and wave spectrogram etc., to instruct the production of yarn and fabric.
Beneficial effect of the present invention is:
The line footpath and the line footpath irregularity that 1, can reflect polynary yarn.
The composition proportion and the proportioning irregularity that 2, can reflect polynary yarn.
3, the impurity component in the energy perception yarn changes and distributes.
4, can carry out overall treatment to the data of infrared photoelectric sensor and capacitive transducer collection by computing machine after, obtain the variation curve and the wave spectrogram of tested polynary yarn, to instruct the production of yarn and fabric.
5, the set composite of being made up of Photoelectric Detection and capacitance detecting can be used for the heterotypic fibre that is mingled with in impurity, the especially cotton yarn in the online detection cotton yarn in the yarn production line, to improve the quality of products, reduces consuming, and saves production cost.
6, the set composite of being made up of Photoelectric Detection and capacitance detecting can be used for the composition proportion and the variation of the polynary yarn of online detection in the polynary yarn production line.
Description of drawings:
Fig. 1 is a kind of structural representation that detects the system of polynary yarn quality of the present invention.
Fig. 2 is a mid-infrared light electric detection means theory diagram of the present invention.
Fig. 3 is a capacitance detecting device theory diagram among the present invention.
Fig. 4 is flow chart of data processing figure among the present invention.
Embodiment:
Below in conjunction with accompanying drawing embodiments of the present invention are described further.
See also Fig. 1, polynary yarn 5 passes the surveyed area of being made up of photoelectric detection system 2 and capacitance detecting device 3 behind constant tension controller 1, is urged to the linear velocity of setting again by constant airspeed device 4.At this moment, yarn is in constant-tension and constant speed state in surveyed area.Photoelectric detection system 2 in the surveyed area obtains the diameter of polynary yarn and the information input computing machine 6 of variation thereof; Simultaneously, also import computing machine 6 after the capacitance detecting device 3 in the surveyed area obtains the capacitance information relevant with proportioning with the diameter of polynary yarn.In addition, the output of the constant airspeed device 4 of constant controller 1 also all is connected to computing machine 6.6 pairs of data of computing machine are handled, metric attributes such as the line footpath of the polynary yarn that calculates and line footpath irregularity, composition proportion and proportioning irregularity thereof, impurity, fault, slubbing, details, cotton knot, and variation curve and wave spectrogram etc., export to and show 7 or print 8, also can be connected to network or other equipment together via input/output interface 9.
Consult Fig. 2, said photoelectric detection system 2, its infrared light supply is made up of crystal oscillator 201, driver element 202, infrared transmitting tube and frequency-selecting amplification and detection unit 203.Infraluminescence pipe 204 is to be driven by the AC driving unit 202 that crystal oscillator 201 encourages.The light signal that infrared receiving tube 205 receives is behind frequency-selecting amplification and detection unit 203, and the drive current of control AC driving unit 202 outputs makes the infrared light power of infraluminescence pipe 204 emissions keep constant.The infrared light of infraluminescence pipe 204 emission projects the profile of tested polynary yarn 5 on the infrared receiving tube 208 behind optical system 207 collimations.The electric signal of infrared receiving tube 208 outputs converts digital signal to through A/D converter 210 behind frequency-selecting amplification and detection unit 209, be transferred to computing machine 6 by computer interface 211.Simultaneously, the light signal that infrared receiving tube 205 receives is after frequency-selecting amplification and detection unit 203 and A/D converter 206 convert digital signal to, also be transferred to computing machine 6 by computer interface 211, this reference signal is used for eliminating because of system parameter variations and causes measuring error.The theory diagram of the photoelectric detection system that constitutes by the infrared light supply of direct drive and shown in Figure 2 similar, cancellation crystal oscillator 201 in Fig. 2 only, and change frequency-selecting amplification and detection unit 203 and 209 into amplifying unit.
Consult Fig. 3, said capacitance detecting device 3, the high-frequency signal of its crystal oscillator 302 outputs is through being added on the pole plate of plate condenser 303 behind the driver element 301.The polynary yarn 5 that is in constant-tension and constant speed state passes between the two-plate of plate condenser 303, make the capacitance of plate condenser 303 change, thereby the phase place of the high-frequency signal that causes changes thereupon.The high-frequency signal of phase change and the base reference signal while input phase difference detecting unit 304 of driver element 301 outputs take place, and its output is transformed into digital signal through A/D converter, is transferred to computing machine 6 by computer interface 306 then.
See also Fig. 4, the data acquisition and the signal processing flow of said computing machine 6 are: gather tension force and speed 10, gather diameter and capacitance 11, data 12 such as calculated diameter, proportioning, impurity, fault, thick knot, thin knot, cotton knot, calculate line footpath irregularity, proportioning irregularity, variation curve and wave spectrogram etc. 13, and output line footpath and line footpath irregularity, composition proportion and proportioning irregularity thereof, impurity, fault, thick knot, thin knot, cotton knot, variation curve figure and wave spectrogram etc. 14 thereof.
Set composite and signal processing method that said photoelectric detection system 2 of the present invention and capacitance detecting device 3 are formed also are a kind of method and apparatus of the heterotypic fibre that is mingled with in impurity, the especially cotton yarn in the online detection cotton yarn in yarn production; Or a kind of in polynary yarn production the composition proportion of the polynary yarn of online detection and the method and apparatus of variation.
Claims (5)
1, a kind of system of measuring polynary yarn quality, comprise constant tension device (1) and constant airspeed device (4), yarn (5) places surveyed area, be provided with photoelectric detection system (2) and capacitance detecting device (3) in this surveyed area, and be connected to the computing machine (6) that is provided with signal handler by computer interface respectively, it is characterized in that: this photoelectric detection system (2) is the infrared light supply (20) that drives through current drives unit (202), the infrared light of its emission is behind optical system (207) collimation, the profile of tested polynary yarn (5) is projected on the infrared light receiving tube (208), and through D/A (210) convert digital signal to, be transferred to computing machine (6) by computer interface (211).
2, the system of the polynary yarn quality of measurement according to claim 1, it is characterized in that: the infrared light supply (20) of this photoelectric detection system (2) is by crystal oscillator (201), driver element (202), infraluminescence pipe (4), infrared receiving tube (205) and frequency-selecting amplification and detection unit (203) are formed, infraluminescence pipe (204) is to be driven by the AC driving unit (202) that crystal oscillator (201) encourages, the light signal that infrared receiving tube (205) receives is behind frequency-selecting amplification and detection unit (203), the drive current of control AC driving unit (202) output makes the infrared light power of infraluminescence pipe (204) emission keep constant; The infrared light of infraluminescence pipe (204) emission is behind optical system (207) collimation, the profile of tested polynary yarn (5) is projected on the infrared receiving tube (208), the electric signal of infrared receiving tube (208) output is behind frequency-selecting amplification and detection unit (209), convert digital signal to through A/D converter (210), be transferred to computing machine (6) by computer interface (211); Simultaneously, the light signal that infrared receiving tube (205) receives also is transferred to computing machine (6) by computer interface (211) after frequency-selecting amplification and detection unit (203) and A/D converter (206) convert digital signal to.
3, the system of the polynary yarn quality of measurement according to claim 1, it is characterized in that: the infrared light supply of this photoelectric detection system (2) is made up of driver element, infraluminescence pipe, infrared receiving tube and amplifying unit, the infraluminescence pipe is by the direct drive unit drives, the light signal that infrared receiving tube receives is behind amplifying unit, the drive current of control direct drive unit output makes the infrared light power of infraluminescence pipe emission keep constant; The infrared light of infraluminescence pipe emission is behind the optical system collimation, the profile of tested polynary yarn is projected on the infrared receiving tube, the electric signal of infrared receiving tube output converts digital signal to through A/D converter behind frequency-selecting amplification and detection unit, be transferred to computing machine by computer interface; Simultaneously, the light signal that infrared receiving tube receives also is transferred to computing machine by computer interface after amplifying unit and A/D converter convert digital signal to.
4, according to the system of claim 1 or the polynary yarn quality of 2 or 3 described measurements, it is characterized in that: this capacitance detecting device (3), the high-frequency signal of its crystal oscillator (302) output is added on the pole plate of plate condenser (303) behind driver element (301); The polynary yarn (5) that is in constant-tension and constant speed state passes between the two-plate of plate condenser (303), make the capacitance of plate condenser (303) change, thereby the phase place of the high-frequency signal that causes changes thereupon, the high-frequency signal of phase change and the base reference signal while input phase difference detecting unit (304) of driver element (301) output take place, its output is transformed into digital signal through A/D converter (305), is transferred to computing machine (6) by computer interface (306) then.
5, a kind of method of utilizing the polynary yarn quality of measurement of the described system of claim 1 is characterized in that: the yarn that will keep setting tension force and setting linear velocity places surveyed area, carries out following steps:
1. Photoelectric Detection: the infrared light supply that drives through direct current or exchange current, the infrared light of its emission is behind the optical system collimation, the profile of tested polynary yarn is projected on the infrared photoelectric sensor, gather the yarn diameter change information of uniform motion by infrared photoelectric sensor;
2. capacitance detecting: in the high frequency alternating electric field, obtain the capacitance information relevant with proportioning with the diameter of polynary yarn by capacitance detecting device;
3. signal Processing: computing machine will from electro-optical pickoff and test using capacitance sensor to the quality signals of polynary yarn carry out data processing, export the line footpath of polynary yarn and line footpath irregularity thereof, composition proportion with and metric attributes such as proportioning irregularity, impurity, fault, slubbing, details, cotton knot, and variation curve and wave spectrogram etc., to instruct the production of yarn and fabric.
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| CN 03129518 CN1195220C (en) | 2003-06-26 | 2003-06-26 | Method and system for measuring qaulity of multi component yarns |
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| CN 03129518 CN1195220C (en) | 2003-06-26 | 2003-06-26 | Method and system for measuring qaulity of multi component yarns |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337109C (en) * | 2003-12-30 | 2007-09-12 | 杨大利 | Digital image analysis method for yarn appearance quality |
| CN101405598A (en) * | 2006-04-07 | 2009-04-08 | 乌斯特技术股份公司 | Method and device for the analysis of moved, solid, elongate test material |
| CN100537886C (en) * | 2006-05-31 | 2009-09-09 | 中国科学院上海光学精密机械研究所 | Fabric guide line tracking device |
| CN101086480B (en) * | 2006-06-06 | 2010-12-01 | 浙江真爱毛纺有限公司 | Yarn light tester and method |
| CN102506682A (en) * | 2011-09-27 | 2012-06-20 | 江南大学 | Method for distinguishing apparent parameters of bunchy yarns |
| 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 |
| CN104975388A (en) * | 2015-07-08 | 2015-10-14 | 江苏圣蓝科技有限公司 | Yarn strength weak ring detection and elimination method and apparatus |
| CN105698685A (en) * | 2016-03-28 | 2016-06-22 | 衢州市优德工业设计有限公司 | Yarn testing device |
| CN105841610A (en) * | 2016-03-28 | 2016-08-10 | 衢州市优德工业设计有限公司 | Yarn detection method |
| CN111487296A (en) * | 2020-04-21 | 2020-08-04 | 郑州星驰智能科技有限公司 | Method for detecting mixing uniformity of powdery material |
| CN114836881B (en) * | 2022-04-06 | 2023-03-21 | 榕普科技(宁波)有限公司 | Yarn breakage detection method and device for shuttleless loom and automatic shutdown system |
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2003
- 2003-06-26 CN CN 03129518 patent/CN1195220C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100337109C (en) * | 2003-12-30 | 2007-09-12 | 杨大利 | Digital image analysis method for yarn appearance quality |
| CN101405598A (en) * | 2006-04-07 | 2009-04-08 | 乌斯特技术股份公司 | Method and device for the analysis of moved, solid, elongate test material |
| CN101405598B (en) * | 2006-04-07 | 2013-08-28 | 乌斯特技术股份公司 | Method and device for the analysis of moved, solid, elongate test material |
| CN100537886C (en) * | 2006-05-31 | 2009-09-09 | 中国科学院上海光学精密机械研究所 | Fabric guide line tracking device |
| CN101086480B (en) * | 2006-06-06 | 2010-12-01 | 浙江真爱毛纺有限公司 | Yarn light tester and method |
| CN102506682A (en) * | 2011-09-27 | 2012-06-20 | 江南大学 | Method for distinguishing apparent parameters of bunchy yarns |
| 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 |
| CN104975388A (en) * | 2015-07-08 | 2015-10-14 | 江苏圣蓝科技有限公司 | Yarn strength weak ring detection and elimination method and apparatus |
| CN105698685A (en) * | 2016-03-28 | 2016-06-22 | 衢州市优德工业设计有限公司 | Yarn testing device |
| CN105841610A (en) * | 2016-03-28 | 2016-08-10 | 衢州市优德工业设计有限公司 | Yarn detection method |
| CN105841610B (en) * | 2016-03-28 | 2018-07-24 | 衢州市优德工业设计有限公司 | A kind of yarn detection method |
| CN111487296A (en) * | 2020-04-21 | 2020-08-04 | 郑州星驰智能科技有限公司 | Method for detecting mixing uniformity of powdery material |
| CN111487296B (en) * | 2020-04-21 | 2022-11-01 | 郑州星驰智能科技有限公司 | Method for detecting mixing uniformity of powdery material |
| CN114836881B (en) * | 2022-04-06 | 2023-03-21 | 榕普科技(宁波)有限公司 | Yarn breakage detection method and device for shuttleless loom and automatic shutdown system |
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| CN1195220C (en) | 2005-03-30 |
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Assignee: Dongguan Texwinca Holdings Limited Assignor: Donghua University Contract fulfillment period: 2008.9.25 to 2013.9.24 contract change Contract record no.: 2008310000212 Denomination of invention: Method and system for measuring qaulity of multi component yarns Granted publication date: 20050330 License type: Exclusive license Record date: 20081112 |
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Assignee: Dongguan Texwinca Holdings Limited Assignor: Donghua University Contract fulfillment period: 2008.9.25 to 2013.9.24 contract change Contract record no.: 2008310000212 Denomination of invention: Method and system for measuring qaulity of multi component yarns Granted publication date: 20050330 License type: Exclusive license Record date: 20081112 |
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