C6 nhieu lo»i guong chieu hiu vpi hmh nguin sing chuan A theo CIE chiiu qua guong d?ng vi cdng nang khac nhau, tuy nhien, cic tdp bin CO hpc, vung quan sit phia sau xe, con guong diing p
Trang 1NGHieN CLTU - TRAO D 6 |
CUA GU'DNG CHIEU HAU 6 T 6
RESEARCH ON DETERMINATION OF THE COEFFICIENT OF REFLECTION
OF VEHICLES REARVIEW MIRROR
TS Bang Vift Ha, ThS Vii Thanh Niem, ThS Dinh Quang Vu, ThS Pham Minh Thinh
Cue Dang kiim Vift Nam
T 6 M TAT
Guang chieu hdu Id linh kien quan trong ducrc sii dgng tren cdc logi xe 6 to giup cho nguai ldi nhgn biet, phdn dodn cdc vdt the xung quanh vdphia sau de dieu khien phuang tign Ngodi vi$c ddm bdo dg bin ca hgc, viing quan sdt phia sau xe, guong chieu hgu con phdi ddm bdo tinh ndng phdn xg Ddy Id mgt trong nhitng thong sd quan trgng ddnh gid chdt lugng cua guong Bdi bdo ndy trinh bdy phucmg phdp xdc dinh hg so phdn xg cua guang chieu hdu 6 to bdng thuc nghigm
Tir khda: Guang chieu hdu, hesophdnxg, viing quan sdt
ABSTRACT
Rearview mirror is an important component used for automobiles It helps the driver identify and judge surrounding and rear objects lo control vehicle In addition to ensuring mechanical strength and field of vision, rearview mirror also ensures the reflection This is one of the most important parameters in the quality assessment of rearview mirror This article gives the test methods to determine the coefficient of reflection of vehicle rearview mirror by experiment
Keywords: Rearview mirror, coefficient of reflection, field of vision
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vi ximg quanh cua ngudi lii, giiip ngu6i lii
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la linh kien khdng thi thiiu tren cic loji xe khi nang phin xa gucmg, ngupi ta sir dung mpt
0 t6 C6 nhieu lo»i guong chieu hiu vpi hmh nguin sing chuan A theo CIE chiiu qua guong d?ng vi cdng nang khac nhau, tuy nhien, cic t<!ri bp thu, tin hifu thu dupc la ning lupng ciia lo»i guong chieu hau nay, ngcii dim bio vi chiim sing, kit qui hiin thi li hf s6 phin x? ciia
dp bin CO hpc, vung quan sit phia sau xe, con guong diing phin tram (%)
phii dim bao tinh nang phin xa Day la thdng
so quan hpng inh hudmg din khi nang quan 6 cic nuoc c6 nin cdng nghifp phit
ISSN 0866-7056
T ^ CHl CO KHf VI$T NAM, S6 10 nam 2016
Trang 2NGHieNCO'U-TRAODOl
trien nhu My, Nhgt, chau Au thi guong chieu
hgu d td (guong) Id ddi tupng bat bupc phai
kiem tra, thu nghiem trudc khi ldp len phuong
tifn ban ra tfai trudng Tgi Vift Nam, guong
Cling vdi ldp, kinh, den Id cac Hnh kifn dupc
qudn Iy chdt lupng bang cdc quy chuan tuong
i3mg Cdng tdc diu ngfaif m guong ^ dupc tien
hdnh theo lp trlnh trong quy chuan QCVN
33:2011/BGTVT, hrong duong ECE R46
Trong thdi gian tdi, de qudn Iy chat lupng
gucmg d td, viec nghien c6u thii nghifm, ddnfa
gia chdt Iupng xdc dinh hf sd pfadn xg guong Id
cdn thiet Nam 2015, Cue Dang kiem \^et Nam
da dupc Bp Giao thdng Van tdi ^ao nhifna vy
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ISSN 0S66 - 7056 TAP CHf CO KHl VIET NAM Sd 10 nam 2016
Trang 3NGHltN CLfU-TRAOe(!)l
Gii tri dpc dupc tren thiit bi se li hf so phin xa
(%) so vdi gii tri khi hifu chuin true tiep
3 THIET BI THty NGHIEM
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m a
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4.TH£rNGinEM 4.1 Miu thu Theo quy dinh cua quy chuin QCVN 33:20II/BGTVT cd 6 l o ^ guong lap hen xe, bao gim:
- Guong loji I: Guong chiiu hau lip trong;
- Gucmg chiiu h^u loai II va III: Guong chiiu hiu lip ngoii chinh;
- Guong chiiu hiu loai IV: Guong chiiu hau lip ngoii goc rpng;
- Guong chiiu hiu loai V: Guong chieu hiu lap ngoii nhin gan
Hinh 4 Mdu thu
Tdt cd cdc loai gucmg ndy cd cdng ndng kfaac nhau, tuy nhidn deu phdi thda man ve hf
sd phdn xa Thyc hien thu nghifm tren 10 mau thu cua cdc logi guong tren theo quy trinh dupc neu trong muc 4.2 vd ket qud thii nghifm the hien trong muc 4.3
ISSN 0866 - 7056
TAPCHi CO KHf VIETNAM So 10 nam 2016
Trang 4NGHieN CLTU-TRAOD61
4^ Quy trinh thir nghifm hdu d td rdt cdn tfaiet nhdm nang cao chdt Iupng
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vd thu nghiem theo quy chudn QCVN 33:2011/ BGTVT, tuong duong ECE R46 ciia chau Au Kdt qud thu nghifm cd dp chinh xdc cao, ddnh gid diing bdn cfaat ciia phdp do
Thidt bi cd the md rdng de xdc djnh he sd phdn xg ciia nhieu logi guong cua xe co gidi hodc cdc loai guong cd be mat phdn xg khdc nhau Bdn cgnh vifc phye vy cdng tac thii nghifm, qudn Iy chdt Iupng linh kifn, thilt bi cdn cd thd phye
vy cdng tdc nghien cuu khoa hpc, cdng tdc ddo tgo tgi cdc trudng dgi hpc ky thugt, vifn nghien Cliu vd pfaye vy ngfaien cuu phdt tridn sdn phdm guong d td cho cdc doanh ngfaif p • Ngdy nfadn bdi: 12/9/2016 Ngdy phdn bifn: 15/10/2016
Hinh 5 Ket qud thu nghipm Tdi lifu tham khdo:
4.4 Ddnh gid
Ket qud thii nghifm dupc xem la dat yeu
cdu neu hf sd phdn xg khdng nfad bon 40%
Tfaeo ket qud thir nghifm trong hinh 5,
tdt cd cdc mdu thu nghifm deu dat yeu cdu vd ket
qud thii nghifm ndy phdn dnh diing ban cfadt ciia
pfadp thu vd chdt Iupng cua mdu tfau
5, KET L U ^
Vifc kiem sodt cfadt Iupng guong cfaidu
[1] PGS.TS Ha Van Vui, TS Nguyen Chl Sdng,
ThS Phan Dang Phong; sS tay thiet ke ca khi,
NXB Khoa hpc Ky thu?t, 2006
[2] QCVN 33:2011/BGTVT; "Quy chudn ky thugt quoc gia vi gucmg chieu hpu diing cho xe 6 to"
[3] ECE R46 - "Uniform provisions concerning
the approval of devices for indirect vision and motor vehicles with regard to the installation
of these devices"
[4] Leonard Hanssen, Integrating-sphere system
and method for, APPLIED OPTICS y Vol 40,
No 19/1 July 2001
[5] Labsphere, Integrating sphere theory and applications, technical guide
ISSN 0866 • 7056 TAP CHl CO KHI V I £ T NAM, Sd 10 ndm 2016