NGHIEN CUtJ, PHAT TRiEN, CHE TAO HE THONG DANH DAU LOI TU' DONG TREN VAI DET • • • Pham Thi Nggc Yin^">, Pham Nggc Hdi^''^ (a) Trung tdm MICA - Dgi hge Bdch Kl'ioa Hd Ngi (b) Cong ty ELATEC - Viin nghien ciru Diin tu, Tin hge, Tudgng hda Tom tdt: Bdi bdo ndy trinh bav viec nghien ciru, phdt trien vd che tgo hi thdng ddnh ddu ldi vdi tu dgng Hi thong^ luiy nhdn thong tin ve vi tri, mire nghiem trgng vd logi ldi tir hi thdng phdt hien loi vditu dgng Dua vdo nhirng thong tin ndy, hi thdng thue hien viec ddnh ddu tgi vi tri md loi dugc phdt hien Hi thdng cung co chirc ndng cung cdp thong tin cho he thong phdt hien loi vdi vi tdc tai vdi nhdm giup cho cpid trinh dinh vi ldi dugc ^chinh xdc Hf thdng dugc thiet ki voi tin cay vd tinh linh dgng cao cho phep thda mdn nhirng yeu cdu cdi dgt da dgng dgc thii cua ngdnh dit may Abstract: This paper studies the design of an automated defect marking system The system receives the defect information, such as the defect's position, type, and severity, from the automated defect detection system Based on the received information, the marking module of system automatically makes a mark at the defect position which is detected Besides, the system also measures and sends the infonnation of fabric speed to the defect detecting system in order to guarantee the accuracy of defect location The designed system, which is highly reliable and flexible, allows for satisfying various user requirements I DAT VAN DE Del may dugc coi Id mdt nhiing ngdnh trgng diem cua nen cdng nghiep Viet Nam Trong thdi ky day manh cdng nghiep boa hien dai hda ddt nudc, del may dugc xem Id ngdnh san xual miii nhon vd cd mdt tiem lyc phdt trien khd manh Tir ndm 2001, Viet Nam cd ban 1000 nhd may del may, thu but tren 50 van lao ddng, chiem den 22% tdng sd lao ddng loan nganh cdng nghiep Cho den nam 2007, ngdnh del may da dem lai viec lam cho hang trieu ngudi lao dgng Vdi nhung lgi thi rieng biet fjpiu vdn ddu tu khdng Idn, thdi gian thu hdi vdn nhanh, nganh del may cd the thu hut dugc nhieu lao ddng va cd nhieu dieu kien md rdng thj trudng va ngoai nudc vdi sy tham gia cua nhieu thdnh phdn kinh te khac Tuy vay, xu thi hdi nhap kinh tl khu vyc va qudc te, nganh det may dang phdi ddi mat vdi nhieu thdch thiic Idn, phdi canh tranh ngang bang vdi cdc cudng qudc xuat khau Idn nhu Tmng Qudc, An Do, Inddnexia, Pakixtan, Han Qudc Thdch thirc ddi vdi ngdnh del may Viet nam la rit Idn Bk vugt qua nhung thach thiic nay, chiing ta phdi gidi quyet timg kho khdn mgt uong dd viec ddm bdo chit lugng san pham del va sdn pham may Id hai yeu td hang dau quylt dinh sy cdng: cua ngdnh del may Viet Nam ' ' ' 9 ^ Tai Viet Nam, qua trao ddi vdi cdc cdn bg tai cdc cdng ty del may, chiing tdi dugc biet rang hien tai chiing ta vdn dp dung quy trinh kiem tra chat lugng vdi del bang mdt thudng, chua cd mdt he thdng phdt hien vd ddnh dau ty ddng Idi tren vdi del Vdi dieu kien kiem tra nhu vdy se dnh hudng rit Idn din chit lugng vd ndng suit cua sdn phdm Tir chiing tdi manh dan nghien ciiu, chi tao va dua vdo iing dung thye te cho he thdng ty dgng danh dau ldi vai He thdng nhan cac thdng lin vl ldi vdi tir he thdng nhdn dang loi vdi ty ddng Phdn 311 didu khidn ciia he thdng dirge thidt ke de he thdng c6 tin cay cao, tidn lgi vai nguoi su duna Chuna toi dang triln khai thye hien va thay dirge nhu'ng budc dau khd quan cua de tai Bail^ao se gidi thidu qua nhung net chung vc he Ihdng nhdn dang ldi vai ty dgng va di sau vao thilt kd he thdng danh ddu ldi vdi ty dgng IL TONG QUAN VE H$ THONG NHAN DANG L6I VAI TV DONG 2.1 Quy trinh ddt va cac loi thudng gap trdn vdi Quy trinh d?t: D?t la mgt qua trinh gom nhidu cdn§ doan, hinh md td tdm luge quy trinh det vdi tir cdc nguyen li?u tu nhien hodc hda hge den luc pham C6 hinh thiic det chfnh Id del kim va det thoi Trong cdc hinh thirc d?t, vdi cd the dugc d?t iron, hoae dugc in hga tilt va nhugm mdu Cac loi thudng gap tren vai d9t: Chung ta khdng quan tam din loai vdi khdng qua khau det vi ciu true cua nd'phy thugc rit nhilu vdo nguydn lifu Hon nua sy phan bd cdc^au tnic Id hodn todn ngau nhien Ddi vdi cdc vdi d^t Iron, nguyen nhdn chu yeu gdy^ra cdc ldi del Id cac loi vl sgi: sgi bi diit qud trinh d?t; sgi cd dg ddy mdng khdng dong deu, cd doan bi giao, cd doan lai bj ddn, mgt so chd bj xu, bi lan tap chit, vv Ddi vdi cdc vai del cd mdu hay cd hoa tilt, loi cd thi xuit hien khau xir ly mdu hodc khau in: mdu bi loang, hga tilt in bi mdo, thilu net khdng diiiig vdi bdn thilt kl my thudt Hinh minh hga mgt sd Idi thudng gap doi vdi vdi del Iron Hinh Cac loi thudng gSp tren cac san phim df t Jacquard: (a) Sgi bi dirt (broken end); (b) lo (holes); (c) loi tren cac nut sgi (knots); (d) da mang (netting multiple); (e) bien mau (oil stain); (f) sgi bj nhor bin (dirty yam) 2.2 He thdng phdt hien vd nhdn dang ldi vdi Trong phin ndy chiing toi chi lap trung phan tfch, ddnh gid cdc cdng trinh nghien ciiu ca bdn cho bdi todn phdt hien loi tren cdc san phim dft dya tren cdc phuong phdp xu ly anh va nhan dang Cac gidi thuat phdt hidn loi tir anh phan bidt bdi cdc dac trung trich chgn va cac ky thuat nhdn dang Cdc phuang phdp phdt hien ldi tren cdc san phdm del tron, hay cd hga lilt tren vdi deu chiing Id rdng viec iing dung cac ky thuat xu ly anh, nhan dang, m^y hge cho ket qua tdt va hodn toan cd the img dung vdo thye tiln Xuit phat tii cac ph^n tich ddnh gid, nhdm ldc gid [Tran09] da dk xuit thilt kl va phdt triln mgt hd thdng phat hien ty ddng ldi tren cdc sdn phdm del dya tren cac ky thual xir ly dnh vd nhan dang bao gdm mgt he thdng chieu sang, mdt camera vdi net va phan giai cao kit ndi mdt mdy trung tam lam cac nhiem vy xii ly, tfnh todn phdt hien va phan loai loi tren anh ciia vdi del (hinh 2) 312 Xlf ly iMiUlt lAlll HdlltOn^ iht^u J*rii 1=^ iPh4thl.?nl3r H