NGHIEN CUfU-TRAO D ^1>NG DUNG KY THUAT c a - D I E N TCrTHyC HIEN K i T N | M A Y TiNH HIEN DAI HOA THI^T Bj TRONG THJ NGHIEM CO KY THUAT APPLYING ELECTROMECHANICAL SOLUTION TO INTERFACE COMPUTERS WITH TESTING EQUIPMENTS IN TRAINING ESTABLISHMENTS TS Le Van Cu-dng Trudng Dai hpc Ngo Quygn (Sy quan Cdng Binh) TOM TAT Bdi bdo trinh bay nghien ciru vd de xudt gidi phdp ung dung ^ ihugt co - dien tu cd kit noi mdy tinh ddi vdi cdc thiit bi thi nghiem co ky thugt cii dang duac sii' dung cdc ca sd ddo tgo khdi nganh Ky thugt nhdm hien dai hda cai tien cdc tinh ndng, gidm gid thdnh thiet hi; Ung dung phdn mim vd thiet ke phdn cimg phii hpp de thy:c hien giao tiep vdi thiet bi thi nghiem, bien ddi cdc tin hieu dgng tuang tu tren thiet bi thi nghiem nhu chuyin vi, luc thdnh tin hieu sd de dua vdo mdy tinh; Xu li vd hien thi cdc thdng sd thi nghiem tren mdy tinh, ddng thai diing phdn mem de dieu khien hogt dpng cua thiet bi theo npi dung thi nghiem Tir khoa: Dieu khien thiet bi thiet bi ca dien tir hien dai hda thiet bi card hocdelam USB 9001/9090 ABSTRACT This article focuses on computer-based solution for measuring parameters and controlling secondhand instruments which are using in technical schools and universities; This research has developed software and proposed electrical scheme to connect measurement equipments to computer and acquire signals from sensors mounted on the measurement equipments The acquired electrical signals are processed and converted into physical values for evaluators In addition, the proposed solution is controlling measurement equipments following tests Keywords: Instrument control, measurement equipments, electromechanic, developed equipments, hocdelam USB 9001/9090 TAP CHi CO KHi VIET NAM, Sd nam 2014 www.cokhivietnam.vn NGHIEN CUfU - TRAO DOI D^T VAN DE 2.2 Su- dung phan mem Hien nay, nhieu trudng day nghe va eac trudng dai hgc khdi ky thuat cdn su dung cac loai thiet bi thi nghiem cii chua cd ket ndi vdi may tinh Cac ddng may chii yeu dugc nhap khau tir Trung Qudc hoac Lien Xd (cii) va bau het cd tinh nang thap co cau dac bang ca khi, cd dp chinh xac khdng cao Hien nay, cd nhieu phan mem cd kha nang kgt ndi vdi cac phan cirng phuc vu cho ludng va digu khien CS day, chiing tdi sir dung Lab VIEW, la mot phan mlm kha manh thidt kl ky thuat, ddng thdi rat de su dung [1] Mot dilm manh ndi bat cua Lab VIEW la eae thuat toan dugc ap dyng len cac mach dien va co cau chdp hanh thyc, nhd vao viee ket ndi he thdng that vdi LabVIEW thdng qua nhigu chuan giao tiep nhu chuan giao tiep RS232 (giao tiep qua cdng COM), chukn USB, ehuSn giao tilp mang TCP/IP, UDP, chudn GPIB, De dap ung yeu eau thi nghiem cang dugc nang Ign thi vide tiep tuc su dung thidt bi cii la khdng cdn phii hgp Tuy nhign, ndu loai bd thiet hi cii va mua sam thiet bi hien dai se gay lang phi va rat tdn kem Mat khac, kdt cku ca cua cac thigt bi thi nghiem co ky thuat cii thudng kha 2.3 Sir dung phan cung bgn vung, it hu hdng Neu chi thay ca cau dac va digu khign bang eac phan tii dien tir de xir li 2.3.1 Su dung phan tudo lu&ng fren may tinh thi se thu dugc thiet bi thi nghiem Cac gia tri vat li ciia thi nghiem ea ky hien dai va chinh xac hem vdi chi phi rat thap thuat nhu: Bien dang (ehuyen vi) tinh tien hoac day, chung tdi khdng di vao nhirng thuat xoay, lye, md men can dugc thu thap bang cam toan bay viec ap dung cho mpt loai thigt bj cu thg, bign tuong ling Sau dd dya trdn eac dac tinh cua ma tap trung dd cap cac giai phap ky thuat chung mdi cam bign dugc ghi datasheet de tinh eho viec hien dai hda cae thiet bi thi nghiem co ky chinh xac gia tri vat li ma cam bign da chuyen sang tin hieu dien thuat cii ndi chvmg Tin hieu dien tir cam bign se dugc dua vao may tinh thdng qua giao tiep ngoai vi, cu thi la card ludng va dieu khign De minh hpa, ta su 2.1 Khai quat dac diem v^ dac va dieu dyng card HDL 9001 cua Hocdelam Group sau kbikn cua thilt bi thi nghiem cu chu-a co kk day; noi may tinh NOI DUNG NGHIEN ClTU Cae thi nghiem ca ky thuat thudng phd bign la can thd hien tuang quan gifra lye va bign dang, nhu: Keo - nen, xoan, udn, va dap, dao ddng vdi nhidu loai vat lieu khac Nhu vay, muc dich cua cac thi nghiem la ludng cac gia tri luc, md men va cac gia ui bign dang tjnh tiln, xoay tuang img Nhung gia tri bang ca thi se cd sai sd cac chi tiet eu bi mdn, rung ddng va nhidu nguyen nhan khac Bdn eanh dd, cac thidt bi thi nghiem chua kit ndi may tinh se ban chd kha nang theo ddi, xu li eae thdng sd thi nghiem, kit qua khdng luu lai dugc mot each da dang bang dd thi, bang Hmh 1; So kit ndi cdm bien TAP CHi CO KHi VIET NAM, Sd nam 2014 www.cokhivietnam.vn NGHIEN ClifU - TRAO D | Doi v6i cac gia tri dich chuyen tinh tifa cac thi nghiem keo - nen vat lieu, chinh la gia tri biSn dang dai ciia mlu thi nghiem theo mot phucmg nhat dinh Neu gia tri biSn dang la kha nho (duoi 10cm), ta c6 the stir dung bien tro chay tinh tien Con neu cac dich chuyen tinh tien kha Ion (tren 10cm), ta co the six dung cac loai cam bien hong ngoai de khoang each: Nhu vay, a day ta co the sir dung bi8n tro chay tinh ti6n de bidn dang ciia mlu K6t hop voi luc keo - nen bing loadcell, ta thu duoc d6 thi mdi quan he giOa luc va bifa dang ciia mlu tren may tinh: Hinh 5: Gdn bien trd chgy de bien a Hinh 2: Bien trd vd cdm bien hdng ngoai bien dgng ddi Trong thi nghiem doi vdi thilt bi keo, nen WE-600, ta can bien dang dai ciia mau cho den mau bi pha huy keo hoac nen: Hinh 6: Do thi sau dd cdi tien thiet bi thi nghiem Hinh 3: Thiet bj thi nghiem keo - nen chua kit ndi mdy tinh Hinh 4: Bien dgng cua mau thi nghiem chiu keo Ddi vdi eac thiet bi thi nghiem xoan, ta can thu thap thdng sd gdc xo5n biln dang ciia mlu va md men xoan tuong ling Tuang ty nhu fren, vdi gdc xoan nhd, ta cd thd dung biln frd xoay dl Cdn ddi vdi gdc xoan Idn, nhigu vdng, cd the bang encorder: Hinh 7- Bien trd xoay vd encorder gdc xodn TAP CHI CO KHi VIET NAM, Sd nam 2014 www.cokhivietnam.vn NGHIEN CUfU-TRAO DOI Vi du ddi vdi thilt bi thi nghiem xoan thep K5 sau day: , * Nhu vay, d hai vi du frgn, ta thay hoan toan cd the kgt ndi may tinh va ludng eac thdng sd thi nghiem cho cac thilt bi cii, vdi nhung phan tu ludng gia thap va kha thdng dung 2.3.2 Set noi mdy tinh dieu khien thiet bi thi nghiem c a c thigt bi thi nghiem cii thudng dugc didu khien thdng qua cac mit nhan ddng, ngat ro le, va cac mit van tang giam thdng sd nao frong qua trinh thi nghiem Hinh Thiit bi xodn thep chua kit ndi mdy tinh D I kit ndi may tinh, ta gdc xoan bidn dang bang encorder (hinh 9) Tu sd vdng xoan thu dugc bang encorder, thdng qua cdng suat cua dpng CO tao md men xoan, ta tinh dugc md men xodn tac dung len mau [2] va ve dd thi (hinh 10): Ddi vdi cac nut nhan ddng, ngat le, ta cd thi thilt kl mpt mach le duge dilu khiln frgn may tinh nhu sau: Nui nhan co ' tFcnmiy —u— Hinh 11: So nut nhdn trudc vd sau cd mgch rale >;>p emu p^Jt mf ^^? Kw >^u ^» dao L^5 ^ ^ ^ HR J H M^nupIUDn itfjil l ^ ^ l• J ^ S ^iBBisptUMV S,^3 Hinh 12: Cdc mit nhdn co tren thiet bi thi nghiem Hinh 9: Gdn encorder bien dang ciia mdu ;250- Hinh 10: Dd thi md men xodn sau kit ndi mdy tinh Hinh 13: Mach ro le dien tu TAP CHi CO KHi VIET NAM, Sd nam 2014 www.cokhivietnam.vn NGHIEN CUfU-TRAO D ! Cae le se dugc dilu khien ddng, ngat tren giao dien may tinh thdng qua phSn mIm LabVIEW [1] Khi nhan mit tuong ling frdn may tinh thi ngudn 5V se kich boat ddng, ngat le thdng qua card giao tidp may tinh, vi du nhu su dung card HDL 9001 ciia Hocdelam Group thi le se dupe digu khien qua cac Switch (SW) nhu sau: -.^ r n U i m^ H > Ddng co duge dilu khiln frdn giao dien chuong trinh thdng qua cac mach nhu sa dd d vi du sau (sir dyng card giao tilp may tinh va driver cua Hocdelam Group): yr n1"~"" Hinh 17: So dieu khien dpng co Hinh 14- Mgch giao tiep mdy tinh dieu khien cdc ro le " " ~'.r, i i^^i:: ; m Thdng qua lap trinh tren phan mlm LabVIEW [ ], ta thyc hign ddng, md van co bang cac thao tac fren giao dien may tinh dl cho ddng ca quay theo chieu va sd vdng tuang ling: — Mdd6nii van • - • - • ^ Hinh 15 Cdc nut nhdn dieu khien ro le tren mdy tinh D6ag van M I | ^ Nhu vay, sau giao tiep vdi may tinh thi ngudi lam thi nghiem thuc hien dilu khiln diilt bi trgn giao dien chuang trinh va hoan toan khdng phai thao tac nhan mit fren thilt bi C d* lai: CH^M; VIA: ^ \HA\H;i ) DCNCi* , ^ ^ i Ddi vdi cae nut van tang giam cac thdng sd, ta cd thg dieu khign bang ddng co dien mot chidu de thyc hien thao tae Hinh 18: Cdc niit tren giao dien mdy tinh di dieu khien ddng ca Hinh 16: Su dung ddng co DC Tren day, la nhiing ndi dung trinh bay cho cae thiet bi dac trung va thdng sd chii ylu tiln hanh thi nghiem co ky thuat De van dyng eho cac thiet bi eu the, can xem xdt ti mi va van dung kJ? thuat, su dyng linh kien hgp li theo yeu cdu dp chinh xac cua tung loai thi nghiem TAP CHI CO KHI V I £ T NAM, Sd nam WTvw cokhivietnam.vn 2014 NGHIEN CUfU-TRAO DOI K E T LUAN Ong dung ky thuat Ca - Dien hi thuc bien ket ndi may tinh nhSm hien dai hda trang thilt bi thi nghiem la bien phap nang cao chit lugng thiet bi mang lai hieu qua cao ca v l tinh kinh tl va ky thuat, dap ling yeu cau thyc t l tai cac co sd dao tao khdi nganh ky thuat Cac kit qua nghien cuu hoan toan ed the md rdng pham vi ap dung cho cac ca sd dao tao nghe va cac hTidng khdi nganh Ky t h u a t • Ngay nhan bai: 20/4/2014 Ngay phan bien: 10/5/2014 Tai li^u t h a m k h a o : [1] Nguyin Ba Hai, Lap trinh LabVIEW, NXB Dai hpc Qu6c gia TP H6 Chi Minh (2013) [2], Le Quang Minh, Nguyin Van Vuong, Sue ben vdt lieu, NXB Giao due (2006) [3], http://w\vw.supertechscientific.coniyiab-testing-equipment.html [4].http://www.testresources.net/900-series-servo-hydraulic-testLng-machines/930-axial-torsion-servo-hydrau test-machine TAP CHi C O KHi V I £ T NAM, Sd nam www.cokhivietnam.vn 2014 ... tinh: Hinh 5: Gdn bien trd chgy de bien a Hinh 2: Bien trd vd cdm bien hdng ngoai bien dgng ddi Trong thi nghiem doi vdi thilt bi keo, nen WE-600, ta can bien dang dai ciia mau cho den mau bi