THÔNG TIN TÀI LIỆU
NGHIEN C I J U - T R A O B P I NGHIEN CU-U CHON GIAI P H A P HOP LY D^ TU DONG HOA KHdl DONG CAC TUY^N BANG CHUYDN TRONG NGANH CONG NGHlEP KHAI THAC M RESEARCH REASONABLE SOLUTION FOR AUTOMATION STARTUP CONVEYORLINES IN THE MINING INDUSTRY TS D jng Van Chi, TS Pham Thi Thanh Loan, ThS Pham Minh Hai, ThS.Thai Hai Au Khoa Ca dien, Truong Dai hpc Mo - Dia chat TOM TAT Sdi bao nghien cm ung dung bp biin doi dong xoay chieu (AC Current Transducers), Encoder va vi dieu thien (VDK) PIC16fS77A dixdy dyng cac module dong va toe chuyen dung Dua tren cong nghe van tai bang chuyen vd dac thii thuc te nganh Khai th Mo, da thiit lap cac thugt toan do, xay dimg so nguyen ly, Igp trinh mo phong tren Proteus khang dinh ket qua ding nhu dinh humg nghien cm Vai muc dich lua chon dufrc mot gidi ph phil hap di img dung cac module vao bai toan tu dong hoa quy trinh cong nghe khai dong tuyin bdng ehuyin cong nghiep noi chung, ngdnh Khai thac mo noi rieng Ngodi the ung dung vdo linh vuc bdo ve le he thong dien, bdo ve nhiet dong ca, truat bdng, gidm s toe dQ vd cdc he thong truyen dong cong nghiep Tir kh6a: Tu dong hoa khai dong bdng tdi ABSTRACT This paper proposes research applications ACJOurrentTransducers, Encoder, Microco PJC16F877A to build modules current measurement and speed measurement Based on the technological process of transport conveyor, the authors have established measurement algorith building structure diagrams, simulate in Proteus to confirm results of research With the purp choosing a suitable solution can be applied to the automation process technology startup conv lines in general industry, in the mining industry in particular Besides can be applied to this mo the field of protective relays for power system, motor thermal protection, protective skating, sp monitoring and transmission systems in other industry Keywords: Microcontroller PIC16F877a, Current measurement Speed measureme Control in the Process Industries ISSN 0866 - 7056 TAP CHl CO KHl VIET NAM, S6 nam 2016 www.cokliivietnam.vn NGHIEN CUlU - TRAO D | BAT VAN BE Trong cong ngh$ van tai bang ehuyin, van de tu d6ng h6a quy trinh khoi dong he thdng gom nhieu tuySn bang da duac dua vao giang day ly thuySt a cac Truong Dai hoc va timg buac duoc chuin hoa, xem mo ta quy trinh cong nghS tdng quat hinh 1, [1],[2], Tuy nhien, dac thu cua nganh Khai thac mo nen quy trinh van hanh cong nghe tu dong hoa cac tuySn bang co su khae biet Dac thii cong nghe van tai bang chuySn cong nghiep mo v6i cac tuySn bang thuong rit dai, hang chuc Km, diSu kien vi dia hinh, dia chat va moi trudng lam viec thudng rat khae nghiet (bp dieu khien logic kha trinh), viec khdi ddng he thdng theo cac nguyen tic: Thdi gian, ddng dien hoac toe thudng duoc lua chon bdi s\r don gian, de cai dat va lap trinh So dd nguyen ly khdi ddng theo nguyen tac thdi gian va tdc dd sii dung ro le duoc md ta nhu hinh 2, hinh 3, [2],[5] n-r Kl ^Ki RThl K2 RTh2 H Hinh Sa nguyen ly khdi ddng theo nguyen tdc thai gian Hinh Sa cong nghe van tdi he bdng tong qudt Trong cong nghiep bp dieu khi§n logic kha trinh PLC ducfc chon nhu mot giai phap toi mi diSu khien va dong vai tro nhir mpt bp dieu khien tap trung Viec chon nguyen tac khai dpng cac tuyen bang se anh huong den sir lam viec on dinh va tin cay cua toan he thong Thuc te CO the chon, van dung cac nguyen tac: 1) Khoi dpng theo nguyen tSc thai gian {T^^: Thai gian qua trinh qua bang); 2) Khai dong theo nguyen tAc dong dien (Ij^: Dong lam viec dpng ca din dpng); 3) Khai dpng theo nguyen t i c toe dp (n : Toe dp dinh miic dpng ca dan dpng); 4) Khai dpng theo phuang phap to hop cac nguySn t i c tren: T,, - , ^ ; T^, - n,^; 1,^ - n^^; T^^ I Kl ||RI1~J [ *C2 11 RI2 I I K3 | T^ T^ r Hinh Sa nguyen ly khdi dgng theo nguyen tdc ddng dien Tuy nhien, cac nguyen tac dieu khien co nhuac diem la khong thS hpi tu va dam b^o cac dieu kien Ij^=^I^^ hoac n^^^n^ Phuong phap cung chi nen ap dung he th6ng c6 ngu6'i van hanh va giam sat t^i cho Khic phuc nhuoc diSm nay, cac nguyen tac dieu khiln theo cac t6 hap: Tfca - Idn,; \ n ^ , hay nguyen tic T^ - n^ thi thuc te cung khong thi chic chan la I^^ > I^_^ Hon nua cac dai lupng Ijj va n^^ dupe va giam sat lien tue bai cac cong vao analog hoac bp dem toe dp cao ciia P L C V i vay, voi mpt bp dieu khien tap tnmg su dung PLC, thuc hien cac chiic nang luong tap trung, dilu khien thi he thong se rat kho de lam viec on dinh va tin cay nhu mong muon - Thuan tien viec cai dat, hieu chinh thong s6 lam viec, cung nhu giam sat quy trinh van hanh Dac biet co loi xii ly cac sir co bat thuang ma khong anh hucmg den viec dimg toan bp cong nghe - D I dang viec phat trien, ma rang va cai tao he thdng ma khong nhat thiet phai can thiep qua sau vao cac thuat toan dieu khien chinh cua PLC - Dam bao he thong lam viec on dinh, tang dp linh hoat va tin cay cho h6 thong di6u khien nho chiic nang phan tan cua cac module SO DO NGUYfiN LY, CAU TRUC CUA HE THONG Sa d6 cdu tnic va phan co ban Xu the hien nay, cac he dieu khien duac dupe mo ta nhu hinh 5, [6], [7] xay dung dua tren he thong dieu khien phan tan (DCS) May tinh va PLC dupe eoi nhu bp giam sat va dieu khien tai trung tam, cac chuc nang do, Tbik bl dieu khien PLC giam sat qua trinh, dieu khien ca cau chap hanh dupe giao nhiem vu cho cac module chuyen dung va cac PLC tram Tu thuc te tren, nhom tac gia de xuat giai phap ling dung vi dilu khiln Picl6f877a, AC Current Tranducer, Encoder de xay dung module chuyen dung dong va toe QUY TRPiH CONG h'GH$ V ^ TAI BANGCHtrytN dp dpng CO bang tai Vai muc dich va giam Cap lieu ~~i \ BanE sat dpe lap cac thong so dong dien, tic dp ciia dneu drag •y^ = P Bane dpng ca dan dpng, ung dung vao cong nghe khai dpng tu dpng nhieu tuyln bang Kit qua nghien Chieu kboi dong ~~~~ _ "t^cuu dupe khang dinh bai cac uu dilm: 1^ T ^ t r Hinh Sa cdu true vd thdnh phdn ca bdn he thong ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, S6 nam 2016 www.cokhivietnam.vn NGHIEN CIJU-TRAO 061 Trong sa do: Nl: Network - Interface (giao dien man^); I/O: Input - Output (c6ng vao tren thiet hi) TI-HcA* MCfK.-L£deMe« i WKAC X Yeu cdu qity trinh khai dpng tuyen bdng: [2] [5] - Tu dpng khoi dpng lien tilp cac hang theo chieu ngupc dong van chuyln va co tri thai gian khai dpng giua cac bang S DOtXi CO D A N D E R ) ACCumnl ***»* VBK-PIc O - Khai dpng bang tiep theo chi c6 thi tien hanh bang hay ca eiu keo bang truac Hinh Sa nguyen ly module chuyen du dong dien dat dong dinh miic va t6c dp bang dat toe dp dinh miic 3.2 Lira chon cac thilt bi module,|4],[5] - Kiem tra va theo doi thai gian khai • Bien dong dien TI: Bien dong c6 tri so dpng tai tram dieu khien, thai gian qua trinh qua lan dong dien co tri so tieu chuan 1A hoac dp phai dam bao tu dpng kiem tra t6c dp ttmg 5A, dong thii cap cua bien dong se cung cap cho bang hay ca cau keo bang dau vao ciia ACCurrent Transducers THIET KE XAY DyTVG MODULE DO AC_Current Transducers: AC_Current DONG VA TOC DO Transducers duac dung de dong AC va chuyen doi tin hieu theo chuan cong 3.1 Thiet ke xay d ^ g sff nguy8n iy; nghiep ti le vai dau vao (1A hoac 5A) Tin hieu dau duac chuan hoa 0-20mA hoac 0-1OV DC [1],[61,[71 voi kha nang khu tap nhieu cao va tuong thich Sir phat trien ciia khoa hpc ky thuat da vcfi dau vao cho VDK, PLC va cac he thong hien tao nhung thiet bi chuyen dung, cac Card thi may tinh luang da nang co dp chinh xac cao, kha nang ghep noi may tinh, noi mang Ket hop voi cac Vi dilu khiln Pic_16F877A: Dong phan mem SCADA co kha nang dieu khien giam VDK Pic (Programable interlligent controller) sat thu thap du lieu dap ling dupe hau het cac dupe sii dung rpng rai cac tinh nang ky thuat yeu cau thuc te dat vupft trpi so vai nhieu dong VDK khae Dac biet, dong 16F877A da, dang dupe rat nhieu cae nha Tuy nhien, nhiing he thong co gia khoa hpc va sinh vien cac truong khoi ky rat dat, phu thuoc hoan toan cong nghe thuat nghien ciiu, hpc tSp Nhom nghien ciiu da vao nha che tao Vai muc tieu nam bat kip thai ehpn VDK de xay dyng Module, hp xu thi phat trien chung ky thuat do, chu VDK 14 bit vai 40 chan, du manh cho cac ling dpng cong nghe, phuc vu cong tac dao tao dung a muc dp thong thuong thuc hanh, nghien cuu khoa hpc chuyen nganh Nh6m tac gia da de xuat xay dung module • Thiet bi toe Encoder: La thiet bi chuyen dung c6 sa nguyen ly duac mo ta nhu vi tri goc ciia dpng co, chiing co co loai: Loai hmh 6, su dung: Bien dong TI, VDK tuang doi (incremental) va loai tuyet doi (absolute) Picl6f877a, ACCurrent Tranducer, cam bien Encoder gom: Nguon sang, dia quay, cam bien t6c dp Encoder anh sang va mach tao xung vuong ^ ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM, S6 nam 2016 www.cokhivietnam.vn NGHIEN Cli(U - TRAO OOl 3.3 Thiit k l mo phdng he thing voi Proteus, (11,(3],[61 • Module ddng tai: Hinh 7, md ta ket qua md phdng vdi diim gia tri djnh mijc ddng tai tren ddng co thii nghiem cdng suat P=2.2kW Hinh Kit qud mo phong vai dong tdi tai diem I,=4,7A Viec su dung bien ddng Tl va ACCurrent Transducers da duoc nhdm tac gia thuc hien tren md hinh thi nghiem thuc, ket qua phu hgp vdi dac tinh nha san xuat Trong bai bao, nhdm tac gia chi thuc hien md phdng tin hieu lay tu cdng cua ACCurrent transducer sau dd, qua chuyen ddi ADC lObit ciia VDK va hien thi LCD, md rdng k6t ndi RS232 qua cdng COM ciia may tinh • Module toe dong ca: Chon Encoder quang cd phan giai lOOxung/vdng, gia thiet thdi gian Is VDK dSm duge sd ximg la N xung Khi do, gia tri tinh toan tdc quay cua dong co la: n^^=(N*60)/100 vdng/phiit Thu^t toan tdc dp va hiSn thi tren LCD duge md ta nhu hinh Hinh 8, K.k qua md phdng tren Proteus ddng co thii nghiem d tdc dp 166 vdng/philt Hinh Ket qud mo phong ket qua tdc tai nj=l66 vong/phiil ISSN 0866 - 7056 TAP CHi CO KHI VIET NAM, Sd nam 2016 w>vw.cokhivietnam.vn NGHIEN CUfU - TRAO OOl KET LUAN Y tudng xay dung module chuyen dung ddng dien va tdc dp ddng co da giai quyet duoc cac yeu can va muc tieu dat Vice su dung bito ddng Tl, AC_Current_Transducers, VDK_Pic16f877a va Encoder da duoc md phdng cdng tren phin mgm Proteus Giai phap de dupe danh gia la hpp ly ddi vdi bai toan tu ddng hda khdi ddng he thdng bang chuyen edng nghiep khai thac md, cd thi phat triln triln xay dung mach ciing dl ling dung vao thuc tl De xuat tiep tue cai tiln, phat triln module theo xu thi tu dpng hda he thing dp da kenh, kit ndi giao dien hiln thi va luu trO tren may tinh Ket qua nghien cuu cd thi triln khai thuc t l chl tao san phim thuang mai, ling dung cho cae he SCADA, quan ly nang lupng, cho cac he thdng Ipc bui tinh dien, cac hinh thiic bap ve ddng ddng ca cdng suit Idn, bao ve trupt bang va bao ve role frong he thdng dien • Ngay nhan bai: 08/02/2016 Ngay phan bien: 18/3/2016 Tai ligu tham khao: [1] Dao Van Tan; Ky thuat so vd ludng dien cong nghiep mo vd dau NXB Giao thong Van tai, 1999 [2] Dang Van Chi; Bdi gidng mon hoc tif dong hoa vd thiet bi ddu Bo mon Tu dong hoa, Tnidng Dai hoc Mo-Diachit, 2013 [3] NguySn Manh Giang; Cdc vi dieu khiin PIC, NXB Khoa hgc Ky thuat, 2009 [4] Cdc bo cdm bien ky thuat lircmg vd dieu khien, ^XB Khoa hgc Ky thuat, 2001 [5] Dao Van Tan, Nguyen Chi Tinh; Tu dong hod qud trinh sdn xudt cong nghiep mo vd ddu khi, NXB Giao thong Van tai, 2001 [6] Emest O.Doebelin, Measurement System Application and design, Mc Graw Hill, 2003 [7] Brian.R.Patrick.Chin, Computer Control in the Process IndusUies, Lewis Publishers, INS 1999 ISSN 0866-7056 TAP CHi CO KHi V I £ T NAM, Sd nam www.cokhivietnam.vn 2016 ... trinh qua bang); 2) Khai dong theo nguyen tAc dong dien (Ij^: Dong lam viec dpng ca din dpng); 3) Khai dpng theo nguyen t i c toe dp (n : Toe dp dinh miic dpng ca dan dpng); 4) Khai dpng theo phuang... bdng tong qudt Trong cong nghiep bp dieu khi§n logic kha trinh PLC ducfc chon nhu mot giai phap toi mi diSu khien va dong vai tro nhir mpt bp dieu khien tap trung Viec chon nguyen tac khai dpng cac... NGHIEN CIJU-TRAO 061 Trong sa do: Nl: Network - Interface (giao dien man^); I/O: Input - Output (c6ng vao tren thiet hi) TI-HcA* MCfK.-L£deMe« i WKAC X Yeu cdu qity trinh khai dpng tuyen bdng:
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