NGHIEN CQU-TRAO Dpi
V- THIET K i CAI TI§N VA CH^ TAO THI^T Bj KigM DINH PHANH 6 TO MB6000
DESIGNING IMPROVE AND MANUFACTURE OF AUTOMOTIVE BRAKE TESTING EQUIPMET MB6000
TS. Le Ba Khang
Bd mdn Ky thuat 6 td, Trudng Dai hgc Nha Trang
TOM TAT
Ndm 2009, trong khuon kho hpp tdc dao tgo vai Cong hda Sec, phia Ban trang bi cho nganh Cong nghe ky thugt o td Trudng Dai hpc Nha Trang thiet bi kiem dinh phanh 6 td MB6000. Thiit bi do hdng Beissbarth cua Due che tgo. Sau thai gian dua vdo hogt ddng, thiet bi bdc Id mpt sd han che do so lieu chi duac dpc dua vdo kim chi, hien thi tren tit ddng hd, khdng cho phep in dn, luu trie.
Nhdm phat huy tinh ndng ky thugt, ndng cao hieu qud khai thdc thiet bi, chiing tdi khdo sat.
chpn phuang dn va tu thiet ke, che tgo board mgch thu nhdn. xir ly, ddn truyen dir lieu den cdng COM ket ndi vdi mdy tinh. Nho phdn mem Visual Basic cai ddt san trong PC md cdc thdng so kiem dinh he thdng phanh 6 td dupe xir ly. chuyen ddi, hien thi trung thuc. tin cdy len mdn hinh mdy tinh, de ddng cho phep in dn, luu trir.
Tit khoa: Kiem dinh, linh kien dien tir, kit ndi.
ABSTRACT
In 2009, within the framework of training cooperation with the Czech Republic, you equiped for Automotive Engineering Department in Nha Trang University of brake tester equipment MB6000, is produced by Beissbarth company of Germany. After their commissioning, the device revealed some limitations because the read-only data based on sewing, shown on the clock Cabinet, do not allow printing and storage.
To promote technical features, improving the efficiency of mining equipment, we survey, select the plan and design, circuit board fabrication to acquisition, processing and data leads to the COM port connect to computer By the Visual Basic software installed in PCs, the testing parameters of brake systems is processed, converted, displaying honesty, trust on the computer screen, allowing easy printing and storage.
Keywords: Testing, electronic components, connect
NGHIEN CUfU-TRAO D 6 |
1. D A T V A N D E
Thiet bi kiem dinh phanh d td MB6000 (bd phan eo ban trinh bay tren hinh 1), do hang Beissbarth eua Due san xuat, dugc Cdng hda Sec frang bi cho nganh Cdng nghe ky thuat d td, Trudng Dai hpc Nha Trang, nam 2009. Thidt bi cho phep kiem dinh d td vdi tai frgng Idn nhdt 2,5 tan, tai frgng de Idn nhat 4,0 tan.
Thyc te, khi boat dpng thiet bi chi cho phep dgc ket qua dya vao sd lieu kim chi, hien thi tren tu ddng hd, mat khac khdng eho phep luu trii, in an sd lieu.
Nham phat huy tinh nang ky thuat, nang cao hieu qua khai thac thiet bi, tao dieu kien thuan loi frong quan ly d td kiem dinh va phye vu day hpc, chung tdi tien hanh khao sat, phan tich chpn phuang an va tu thiet kg, ehg tao bd phan thu nhan, xir ly, truyen dan, ket ndi MB6000 vdi may tinh de hien thi, luu trii dit lieu, in dn.
2. PHU'ONG PHAP NGHIEN CUtJ 2.1. P h v o n g phap nghien ciru
Thyc nghiem, dya fren viec khao sat thyc te thiet bi MB 6000 (cdu tao, nguyen ly trinh bay tai muc 2.2), qui trinh, tieu chudn kiem dinh phanh d td [3] va tir vide phan tich chpn phuong an, tien hanh thiet ke, ehe tao board mach linh kien dien tir de thu nhan, xu ly, truygn dan dii lieu, ket ndi thigt bj MB6000 vdi may tinh, tien hanh chay thir, kiem fra, digu chinh va do - phan tich sd lieu d to kidm dinh.
2.2. C^u t^o, nguyen ly hoat dgng ciia thiet bi MB 6000 [2]
- cdu tao: Thidt bi MB 6000 gdm cd be thu, bang thir, tii ddng hd va dieu khien tir xa.
+ Til ddng hd, gdm: bd nguon - bidn ap, day va cac dSu ndi, motor budc ed gan kim ehi.
+ Dieu khien tir xa cam tay-remote: Bao gdm cac phim chiic nang dung dd lua chgn chg do, dieu khien sy hoat ddng cua thidt bi.
-I- Be thu: Trgn dd lap dat cd dinh, vung chdc bang thii, gdm 2 bd mid (con lan), 2 fruc trugt. Dan ddng ru Id thdng qua truyen dgng xich eua hop giam tde gan vdi dpng c a dien.
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Hinh 1: Tu ddng hd (a), dieu khiin titxa (b) vd be. bdng thu (c) cua thiet bi kiim dinh phanh 6 td MB6000
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NGHIEN C U ( U - T R A 0 D 6 I
- Nguyen ly hoat dong
Tien hanh dua d td len bang thu, dieu khign cho ru Id quay, khi toe dp d td da dn dinh ngudi lai sd dap phanh (theo qui trinh kiem dinh phanh), liic nay banh xe giam tdc va dimg lai, do true quay fran bi ddng va ed tdc dp quay rat cao so vdi tdc dp quay ciia banh xe (dudng kinh cua true quay fran rat nhd so vdi dudng kinh cua banh xe) nen true quay fran van tiep tuc quay, do dd se sinh ra sy trugt giiia true va banh xe. Qua trinh nay dugc nhan bigt thdng qua Cam bien true trugt ed gan d dau true. Khi tin hieu eua mot banh xe nao do frong qua trinh phanh tao ndn dp trugt gidi ban thi bd xir ly se ngat mach ddng ca dien va ghi nhan ket qua lue phanh tai thdi diem do. Gia tri lye phanh do Cam bien lye phanh bao ve bd phan frong tu ddng hd thdng qua kim chi.
3. KET QUA NGHIEN CUtJ VA THAO L U ^
3.1. Khao sat, chon phirgng an va thiet ke, ch^
t^o board mach di ket n6i thiit bi vol may tinh Tidn hanh nghien ciiu, khao sat, phan tich va dya fren ca sd khoa hgc ket hgp tinh hgp ly, chgn giai phap idy du lieu bang each frich tin hieu tir dudng truydn den motor budc cua ddng hd chi thi (hinh 2) chuygn vg board mach cd vi didu khidn (hinh 3) dd xfr ly, din truyen len may tinh thdng qua cdng COM.
• Chd tao board mach (hinh 3):
"1 1—1
1 May linh | j
1 1—rn 1
Tin hifu cam bien
Thiet bj laoii
Motor buoc ciia ddng b6 chi thj
Hinh 3: Board mgch thu nhdn, xu ly truyen ddn die lieu I) Zdc cdm trich dir lieu tif Motor budc;
2} Tu loc; 3) Bd chdt; 4) AT89C51;
5) ICMax 232; 6) Cdng COM; 7) Tu dien.
May tinh PC dugc ehgn la loai thdng dung.
Hinh 2: So dd gidi phdp truyen ddn vd kit ndi vdi mdy tinh.
Tai board mach, dii lieu (dang dii lieu ciia motor budc) dugc chuyen vao zac cam (1), sau do hai IC chot (3) se thu nhan va ehuydn tdi AT89C51 (4), tai day nhd chuong trinh ty vidt nap vao nd ma AT89C51 chuyen ddi sang ma ASC, rdi xuat dii lieu ehuydn dua tdi cdng COM vao may tinh- Nhd lap trinh Visual Basic cai dat san ma nd tiep nhan, xir ly va chuyen ddi hien thi dii lieu Idn giao dien (hinh 4) cua man hinh PC.
Tir do ed the luu tr& dii lieu vao cac d tuy chgn ciia may tinh.
3.2. Thiet ke giao dien, viet phan mem cho may tinh
- Giao dien thiet ke trinh bay fren hinh 4, gdm phan hien thi gia tri va ten cac thdng sd (lye phanh, do lech, tdng hieu qua phanh chinh, phanh tay), gia tri so sanh chudn (theo QCVN 09: 2011) [3], ngay thang nam, bien sd xe kiem fra, kdt qua kiem dinh dat hay khdng dat,...
- Su dung phdn mdm Visual Basic dd hidn thi dir lieu len may tinh. Ma ngudn duge vidt dya fren cac phan cua giao dien thigt kl [4].
3.3. Thu* nghiem
Chay thu va do kiem fra lye phanh 3 d td: '^
NGHIEN CUfU - TRAO OOl
Getz -79A 03935, Nissan -79C 0332, Toyota -79C 0484, theo qui trinh ki6m dinh 6 to hien hanh va Quy chuin Viet Nam 09: 2011 [3], kSt qua trinh bay tren hinh 4.
NHA TRANG UNIVERSITY CHUONG TRINH KIEM DINH PHANH OTO
NHA TRANG UNIVERSITY CHUONG TRINH KIEM DINH PHANH O TO
NHA TRANG UNIVERSnY CHUONG TRINH KIEM DINH PHANH 0 TO
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TONQHEUOUtmiMITlYni
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- nHinh 4: Giao dien hien thi dir lieu vd sd lieu do kiem dinh phanh d td
a) 6 to Getz-79A 03935; b) 6 td Nissan -79C 0332;
c) 6 to Toyota -79C 0484 3.4. Thao ludn
Trong qua trinh do lUc phanh 3 d td, ket qua dugc hien thi tren man hinh may tinh (hinh 4) vdi sd lieu trung thUc (phii hgp vdi chat lugng d td thdc te), de ki^m tra, theo ddi, thdi gian nhanh chdng, ddng thdi cd th^ in ^n, lUu trii vao may tinh. Til ket qua nay, ho trg viec tu van ky thuat he thdng phanh va theo doi dinh ky d td kiem dinh,...
Tuy nhien, viec tU dpng hda chda hoan toan, phai nh^p trpng lugng cau va Itfc phanh khi do tren ciing mot c^u cdn cd sii sai lech so vdi so lieu hien thi tren bang ddng ho cd 2-3%. Sai so nay kha nhd, anh hudng khdng nhi^u ddn kit qua kiem dinh, cSn phai tiep tuc nghien ciiu, hoan thien chuong trinh tinh de khac phuc cac han che ndi tren va hiidng den chuyen giao ket qua nghien cdu cho ca sd cd sit dung thiet bi MB 6000 ciing dac diem nham nang cao higu qua kiem dinh phanh d td.
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NGHIEN CljrU-TRAOD(!)l
4. K E T L U ^
Budc d i u thyc hipn thigt kd cai tien va ehe tao, td hgp thidt bi kigm dinh phanh d td MB 6000 lam vide dn dinh, tin cay, de dang luu trii, in an dii lieu va giam duge phan kinh phi do khdng phai nhap ngoai, ddng thdi phyc vu thiet thye viec day va hpc, nghien ciiu cua thiy trd nganh Cdng nghe Ky thuat 6 td, Trudng Dai hpc Nha Trang. •
Ngay nhan bai: 05/4/2014 Ngay phan bien: 17/5/2014 Tai li^u tham khao:
[1], Nguyin Tang Cudng, Phan Qudc Thang (2004), Cdu tnic vd lap trinh vi dieu khien hpc 8051, NXB. Khoa hpc va Ky thuat.
[2]. Hudng ddn su dung thiet bi kiem dinh phanh MB 6000, do hang Beissbarth cua Diic va Cdng ty VietNet cung cap, 2009.
[3]. Quy chudn kiem dinh he thdng phanh d td Viet Nam 09: 2011, Bd Giao thdng Van tai.
[4], DELU Quang TuAn (2006), Hu&ng ddn viet chuong trinh lam todn bdng Visual basic 6.0, NXB. Giao thong Van tai.
