2006-2007 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishe

Murrells, C

Tao, XM

Xu, BG

2006-2007 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedVoR allowe

PolyU Institutional Repository

? 27 ?　? 10 ?2006? 10 ??　?　?　?Journal of Textile ResearchVol.27　No.10Oct.　2006????:0253-9721(2006)10-0009-05??????????????????徐宾刚 ,MURRELLS Charlotte , 陶肖明(?????? ??????? ,??)?　?　??????????????????????????????????。????????????? ,?????????????????????????。???????????????? , ?????????????????????????????????????。?????? , ???????????????????? ,?????????????? 2?????。???　??;??;????;????;?????????:TS106.419　　　?????:A　　　Computerized characterization of the yarn snarling distributionXU Bin-gang , MURRELLS Charlotte , TAO Xiao-ming(Institute of Textiles and Clothing , The Hong Kong Polytechnic University , Hong Kong , China)Abstract　The number of yarn wet snarling per unit length is an important indirect index for the evaluation ofyarn residual torque.A computerized characterization method for the yarn snarling distribution was proposed byapplying the digital image and signal processing techniques to the actual yarn snarling images.The yarnsnarling characteristic curve is firstly extracted , then several Gauss signals would be calculated to match withthe yarn snarling characteristic curve.Experimental results revealed that the number of yarn wet snarling canbe automatically calculated with a high accuracy by the proposed method , besides , the height and width valuesof each snarling can also be obtained.Key words　yarn;snarling;signal processing;image processing;pattern recognition????:2006-01-11　　　????:2006-04-18????:徐宾刚(1973-), 男 ,助理教授 ,博士。主要研究领域包括纺织机械与纱线力学 、数字信号及图像处理等。　　?????????????。????? ,?????????? ,????????? 、??????? ,???? ,???????????????????。???? ,???????????????????????? ,????????????[ 1]??????????[ 2] ?。??? ,?????????[ 3 , 4] ??????????????????????????????????? 。????????????? ,????????????????????[ 3 , 5] ,???????????????????????????????。??????????????????????????? ,??????????????????? ,?????????????????????? 。1　????? 1????????????????????? ,???? 3???:????? 、????????? 。?????????????????????????? ,?????????????????———?????? ,????????????????????? 。???????? 2???:1)????????????? FFT?? ,??????????????? ,?????????????????? ,??????AOP(??????????)[ 6] ???????;DOI :10.13475/j.fzxb.2006.10.0032)AOP ??????????? ,??? 、??????????????????????? ,??????????????????????? ,????????????????????????????????。?? ,???????? ,???????????????? ,???????????? 2 ????? ,?? 2?? 。AOP???????????????? ????? ,??????????????[ 7] 、????????[ 8]?????[ 9] ???。?1　??????????　?2　??????????　2　??????2.1　?????????　　? 3(a)?????????????? ,???????????????? ,?? 3(b),??????? ,??????????????? ,???????? ,??3(c)??。??3??? ,????????????? 3(c)? ,????????????????? ,????????????????????????。????????? 3(a)??????????????????? ,?????????????????????????????????? 。?? 3(c)???? ,?????????? ,????????? 3　?????????　?????? ,??????????? ,??????????????????????????? ,???????????? 。2.2　????????—FFT??? 3(c)?????????????? N ?1 419? , ???? FFT ?? , ????? Fs ?200? s ,?????? 、? Hanning ???? FFT?? ,?????? 4(a)。? 4　FFT?????????　 ? 4(a)??????????????????????? 。??? ,???????????????????????? a 、?? f ???ψ,???????????? 。y =asin(2πft i +ψ)+M=5.4sin(2π×2.14t i -1.7)+32.5 ,ti ={1 ,2 , …, N} Fs (1)10【　】 ???? ? 27???:M 、 ti ???????????????;N 、Fs ???????????????????。?4(b)??????(1)??????????? ,???????????????? ,?????????????? 。?????????????? ,???????????????????? ,?????????????????????? 。??????????????????? ,????????????????? ,????AOP?????????????。2.3　???????????—AOP???AOP ?????? 3(c)????????????? ,??????。?????????? q(t), ???? G ={gi}i=0 , 1 , … , ∞??????????????(?‖gi ‖ =1)???? 。g i(t)=(πσ2i)-0.25exp[ -(t -μi)2 2σ2i ](i =0 ,1 , … , ∞) (2)?? , σi 、μi ???? i ???? g i(t)?????? 。??? q(t)???? G ???????〈q ,g i〉g i ,?????????? R 1q ,?q =〈q , g i〉gi +R 1q (3)?? g i ?R 1q ???? ,?????? R1q ???????? ,??????q =∑N-1n =0〈Rnq , gn〉gn +RNq (4)?? ,Rnq ??n ?????????? ,?R0q=q 。?? ,?????? q(t)??????????????。??AOP??????????[ 9] 。??AOP ???????????????????????????? ,??????????? ,?????????????????????? ,?????AOP ??????????? ,???????? 2???。??????????? ,???????????〈RNq , gN〉 < 13∑N-1n =0〈Rnq , gn〉N (5)　　?(5)???????? N +1??????????????? N ??????????1 3?????。?(5)???????? 1???:??????????????????????1 3 ,??????????????? ,????????。AOP????? ,???????? 1???????????????? 。???? FFT ?AOP?? ,? FFT?????????????????????:σz =Fs6f (6)　　?(6)??????? FFT ??????????? 1 ??????? , ?????????±σz ????? ,???????????。??FFT ????????? ,? 3(c)????????AOP????????5(a)?? ,?????? 15 ????? , ?????????? 1。????????????????????? ,?? 5(b)?? ,???????????????????? ,?????????????????? 。?5　?????????????????　2.4　????????????????AOP?????? ,?????????????????? 。???????????? 1?????????。????????????????????????????? ,????? ,???????11?10? ????:?????????????????? 【　】　　　? 1　????????????????? ??μ ?? А ?? σ ?? ??μ ?? А ?? σ1 74.5 219.1 57.0 9 895.5 131.8 26.82 217.5 156.1 34.1 10 991.5 104.1 25.83 323.5 105.9 24.8 11 1 077.5 90.4 22.94 422.5 94.6 25.7 12 1 156.5 82.5 19.45 515.5 107.9 27.9 13 1 237.5 70.3 15.96 610.5 100.8 23.6 14 1 309.5 76.1 20.87 705.5 104.8 26.8 15 1 382.5 70.5 15.98 800.5 92.1 20.5?????????????????? ,?????[ 10] 。? 5(c)???????????????15?????? 14????????????。????? 15 ?????? 13 ?????(???? 14?????)??? 6 ,????????????????????。???????????????????????(?? 7??)????????? ,?????????????? 6?? ,????????????????????????? 。? 6　?????????　? 7　??????????????　3　?????83 tex(7 Ne)? 29 tex(20 Ne)???????? ? ? ? ? ? ? , ? ? ? ? ? ? 43.7 、63.4? 10 cm 。????? 3??????? ,???????12 cm 。?????????????????????????? ,???????????????????????? ,?????2 。???? ,?? 2????????? ,2???????????????? , 2?????????????????????? , ????1????? ,???????????????? 3.5%,??????????? 0.4%。???????????????????? ,????????????????。?? ,????????????? ,????????????????????????? ,?????????????????????? ,??????2。? 2　????????????????? ?????????? ????? ?????? ??[ CV%]?? ??[ CV%]???:83 tex??:43.7? 10 cm1????444415.8 [ 6.9]15.8 [ 6.8]33.1 [ 18.5]33.1 [ 17.7]2????454515.3 [ 5.7]15.9 [ 5.7]32.4 [ 23.7]32.3 [ 21.8]3????383816.9 [ 6.4]17.7 [ 5.6]38.9 [ 21.0]39.0 [ 17.3]???:29 tex??:63.4? 10 cm1????555510.1 [ 6.0]10.7 [ 4.3]23.7 [ 19.8]23.6 [ 16.0]2????525210.6 [ 5.8]10.8 [ 4.5]24.6 [ 22.0]24.4 [ 15.8]3????525210.6 [ 6.0]11.2 [ 4.9]24.4 [ 21.8]24.6 [ 10.3]4　?　???????????????????????????? ,???????????????????????????????。?????????????? ,???? ,??????????????????????????????????。?????? ,????????????????????????? 。 FZXB????:[ 1] 　?? , ??? , ??? , ?.????????????????[ J] .???? , 2004 , 25(6):58-60.[ 2] 　?? , ??? , ??? , ?.?????TM??????[ J] .???? , 2004 , 25(5):38-40.[ 3] 　Tao X M , Lo W K , Lau Y M.Torque balanced singlesknitting yarns spun by unconventional systems , part I:cottonrotor spun yarn[ J] .Textile Res J , 1997 , 67(10):739-746.[ 4] 　Xu B G , Tao X M , Wong S K , et al.Nu-TorqueTM singlesring yarn and its production technology[ A] .In:Chen XW, Ge Y , Yan X Y , eds.Proceedings of the TextileInstitute 83rdWorld Conference[ C] .Shanghai:The Textile12【　】 ???? ? 27?Institute &Donghua University , 2004.494-496.[ 5 ] 　Murrells C M , Wong K K , Hua T , et al.Study of yarnsnarling in Nu-TorqueTM singles ring yarns[ A] .In:Chen XW , Ge Y , Yan X Y eds.Proceedings of the TextileInstitute 83rd World Conference[ C] .Shanghai:The TextileInstitute &Donghua University , 2004.401-404.[ 6 ] 　??? , ??? , ???.??????????[ J] .???? , 1997 , 25(4):52-58.[ 7 ] 　??? , ???.????????????????????[ J] .???? , 1997 , 13(3):54-60.[ 8] 　??.?????????????? 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Computerized characterization of the yarn snarling distribution

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