GB 17352-2010 PDF in English
GB 17352-2010 (GB17352-2010) PDF English
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Performance and installation requirements of rear views mirrors for motorcycles and mopeds
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GB 17352-1998 | English | 479 |
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Motorcycles and mopeds rear-view-mirrors requirement of performance and installation
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Standards related to (historical): GB 17352-2010
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GB 17352-2010: PDF in English GB 17352-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.140
T 84
Replacing GB 17352-1998
Performance and Installation Requirements of Rear Views
Mirrors for Motorcycles and Mopeds
ISSUED ON: JANUARY 10, 2011
IMPLEMENTED ON: JANUARY 1, 2012
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Performance Requirements ... 6
5 Installation Requirements ... 8
Appendix A (normative) Procedure for Determining the Radius of Curvature r of the
Reflecting Surface of Rear-view Mirror ... 9
Appendix B (normative) Methods for Impact Test and Bending Test ... 11
Appendix C (normative) Method of Reflectivity Determination ... 15
Performance and Installation Requirements of Rear Views
Mirrors for Motorcycles and Mopeds
1 Scope
This Standard specifies the performance and installation requirements of rear-view mirrors for
motorcycles and mopeds.
This Standard is applicable to motorcycles and mopeds (hereinafter referred to as the
motorcycles) and does not apply to motorcycles with partially or fully enclosed body parts for
the driver.
2 Normative References
The clauses in the following documents become clauses of this Standard through reference in
this Standard. In terms of references with a specified date, all subsequent amendments
(excluding corrigenda) or revisions do not apply to this Standard. However, parties to an
agreement based on this Standard are encouraged to explore the possibility of adopting the latest
versions of these documents. In terms of references without a specified date, the latest version
applies to this Standard.
GB/T 5359.1 Term for Motorcycles and Mopeds - Part 1: Types of Vehicles (GB/T 5359.1-2008,
ISO 3833:1977, NEQ)
3 Terms and Definitions
The terms and definitions established in GB/T 5359.1, and the following are applicable to this
Standard.
3.1 rear-view mirror
A device used to provide a clear rear view, excluding complex optical systems, for example,
periscopes.
3.2 radius of curvature of the reflecting surface
The average radius of curvature of the reflecting surface measured in accordance with the
method specified in Appendix A.
3.3 principal radii of curvature at one point obtained on the reflecting surface
100 mm, except the smoothed edges of the fixing holes or recesses with a diameter or
maximum diagonal less than 12 mm (including the parts that are still adhered to the
protective shell after the impact test in accordance with the method specified in
Appendix B) shall not be less than 2.5 mm.
4.2 Dimensions
4.2.1 Restrictions on the minimum dimensions for the reflecting surface
4.2.1.1 The area shall be no less than 6,900 mm2.
4.2.1.2 When the mirror is circular, its diameter shall not be less than 94 mm.
4.2.1.3 When the mirror is not circular, the periphery of its reflecting surface shall be able to
accommodate a circle with a diameter of 78 mm.
4.2.2 Restrictions on the maximum dimensions for the reflecting surface
4.2.2.1 When the mirror is circular, its diameter shall not be greater than 150 mm.
4.2.2.2 When the mirror is not circular, its reflecting surface shall not exceed a rectangle of 120
mm 200 mm.
4.3 Reflecting Surface and Reflectivity
4.3.1 The reflecting surface of the rear-view mirror shall be a spherical convex mirror.
4.3.2 The difference in the radius of curvature shall satisfy the following requirements:
a) The difference between the principal radius of curvature ri or ri and rp shall not be
greater than 0.15r;
b) The difference between the rp (rp1, rp2 and rp3) value and the r value at any point shall
not be greater than 0.15r.
4.3.3 The “r” value shall be no less than 1,000 mm and no more than 1,500 mm.
4.3.4 The normal reflectivity value determined in accordance with the method specified in
Appendix C shall not be lower than 40%. When the rear-view mirror has two working positions
(day and night), the color signals of road traffic shall be correctly recognized in the day position,
and the reflectivity value in the night position shall not be lower than 4%.
4.3.5 During normal use, even if exposed for a long time under adverse weather conditions, the
reflecting surface of the rear-view mirror shall still satisfy the reflectivity value specified in
4.3.4.
4.4 Impact and Bending Resistance
4.4.1 The rear-view mirror shall be subject to impact test and bending test in accordance with
the methods specified in Appendix B, so as to determine its capability to withstand impact and
bending.
4.4.2 During the impact test, the pendulum shall be able to continue swinging for more than
20 in the plane of its release trajectory after impacting the rear-view mirror.
4.4.3 After the impact test and bending test, the reflecting surface of the rear-view mirror shall
not be broken, but it will be deemed to comply with the requirements if it falls into one of the
following two situations:
a) The glass fragments remain stuck to the protective shell or to objects firmly connected
to the protective shell. The glass can be partially separated from the above-mentioned
parts, but the length of any side of the broken area shall not exceed 2.5 mm. At the
point of impact, small fragments may break away from the above-mentioned parts.
b) The reflecting surface is made of safety glass.
5 Installation Requirements
5.1 General Requirements
Under normal use condition, the rear-view mirror shall be fixed in such a mode that it does not
significantly change its field of view due to movement or cause the driver to have an illusion
of the image due to vibration.
5.2 Quantity
Two rear-view mirrors shall be installed on the motorcycle, one on the left side and one on the
right side of the motorcycle.
5.3 Position
When the direction handle is perpendicular to the longitudinal center plane of the motorcycle
and the rear-view mirror is adjusted to the normal position, the distance between the center of
the mirror and the longitudinal center plane of the motorcycle shall be no less than 280 mm.
5.4 Adjustment
The driver shall be able to adjust the rear-view mirror from his normal driving position.
B.1.1.2 The center of impact of the pendulum coincides with the center of the rigid sphere. The
mass of the pendulum converted to the impact center shall be 6.8 kg 0.05 kg, and its
calculation formula is:
Where,
m0---the mass of the pendulum converted to the impact center, expressed in (kg);
m---the mass of the pendulum, expressed in (kg);
d---the distance between the center of the mass of the pendulum and the swinging axis of the
pendulum, expressed in (mm);
I---the distance between the center of the rigid sphere and the swinging axis of the pendulum,
expressed in (mm).
B.1.2 Test process
B.1.2.1 In accordance with the method recommended by the rear-view mirror manufacturer or
motorcycle manufacturer (when appropriate), fix the rear-view mirror on the test bench.
B.1.2.2 During the test, the positioning of the rear-view mirror
B.1.2.2.1 The direction of the horizontal and vertical axes of the rear-view mirror shall be the
same as the actual vehicle loading state.
B.1.2.2.2 If the rear-view mirror is adjustable in an angle relative to its base, then, it shall be
located within the adjustment range specified by the rear-view mirror manufacturer or
motorcycle manufacturer, and at the most unfavorable position for swinging during impact.
B.1.2.2.3 If the distance of the rear-view mirror relative to its base is adjustable, then, the
adjustment device shall be adjusted to the position where the protective shell is closest to its
base.
B.1.2.2.4 If the reflecting surface can be adjusted within the protective shell, then, the upper
corner farthest from the motorcycle shall be adjusted to the position where it protrudes the most
from the protective shell.
B.1.2.3 The plane where the pendulum release trajectory is located shall be parallel to the
longitudinal center plane of the motorcycle. When the pendulum is in the plumb position, the
horizontal plane and the longitudinal vertical plane passing through the center of the rigid
sphere shall pass through the center of the mirror defined in 3.5, and the rigid sphere shall
lightly touch the surface of the rear-view mirror.
B.1.2.4 When the pendulum is in the plumb position, the contact point of the rigid sphere is not
Appendix C
(normative)
Method of Reflectivity Determination
C.1 Terms and Definitions
C.1.1 CIE standard illuminant A1):
C.1.2 CIE standard light source A1): gas-filled tungsten lamp at correlated color temperature
T68 = 2,855.6 K.
C.1.3 CIE 1931 standard chromaticity observer1): it is a radiation sensor, whose chromaticity
characteristics are equivalent to the trichromatic excitation value 𝑥(), 𝑦(), 𝑧() (see Table
C.1).
C.1.4 CIE spectral trichromatic excitation value1): in the CIE (x, y, z) system, the trichromatic
excitation value of equal energy spectral components.
C.1.5 Photopic vision1): normal eyes are adapted to vision at a brightness of at least a few
candelas per square meter.
C.2 Instruments
C.2.1 Overview
C.2.1.1 The test instrument consists of a light source, a test mirror support, a receiving unit with
light detector and indicating instrument, and a device to eliminate the influence of external light
(see Figure C.1).
C.2.1.2 The receiving unit may include an optical integrating sphere for measuring non-planar
mirrors (convex mirrors) (see Figure C.2).
C.2.2 Spectral characteristics of light source and light detector
C.2.2.1 The light source consists of CIE standard light source A and a lens that can turn the
light emitted by the light source into a parallel beam. In order to keep the light source voltage
stable when the instrument is working, it is recommended to use a regulated power supply.
1) Definition taken from CIE (International Commission on Illumination) Publication 50 (45), International
Electronic Glossary, Group 45: illumination.
C.2.2.2 The spectral response of the light detector attached to the receiving unit shall be
proportional to the photopic brightness function of the CIE (1931) standard chromaticity
observer (see Table C.1). It is also possible to use other illuminant-filter-receiver combinations
that generate effects that are completely equivalent to CIE standard illuminant A and photopic
vision. When using a light-integrating sphere in the receiving unit, the inner surface of the
sphere shall be coated with a matte (diffuse), spectrally non-selective white paint.
C.2.3 Geometric conditions
C.2.3.1 The incident beam angle (i) is preferably 0.44 rad 0.09 rad (25 5) with the vertical
line perpendicular to the test surface and shall not exceed the upper limit of the angle (0.53 rad
or 30). The angle between the receiver axis and this vertical line (r) shall be equal to the
incident beam angle (see Figure C.1). The diameter of the incident beam on the test surface
shall be no less than 19 mm, and the area covered by the reflected beam on the light detector
shall be as close as possible to the coverage area when the instrument is calibrated, and smaller
than its photosensitive area, but not smaller than 50% of it.
C.2.3.2 The diameter of the light-integrating sphere used for the receiving unit shall be no less
than 127 mm. The apertures of the light-integrating sphere incident window and the test mirror
window shall be able to allow all incident beams and reflected beams to pass through. The light
detector shall be placed away from direct exposure to incident and reflected beams.
C.2.4 Light detector -- the electrical characteristics of the indicating instrument
On the indicating instrument, the reading output by the light detector is a linear function of the
brightness in the photosensitive area. In order to facilitate zero-setting and calibration, light,
electricity, or the combination of light-electricity may be adopted, but the method adopted must
not affect the linearity and spectral characteristics of the instrument. The accuracy of the
receiver-indicating system shall be within 2% range of the full scale or 10% range of the
reading (limited to the smaller of the two).
C.2.5 Test mirror support
The test mirror support shall facilitate the positioning of the test mirror, so that the axes of the
light source support arm and the receiver intersect on the reflecting surface. The reflecting
surface may be located in the middle of the lens, or on any side, depending on whether it is the
first surface, the second surface, or a “conversion” prism.
C.3 Methods
C.3.1 Direct calibration method
C.3.1.1 The direct calibration method uses the atmosphere as the reference standard. This
method is applicable to instruments whose structure allows the receiver to be adjusted to the
optical path of the light source for 100% measurement calibration (see Figure C.1).
C.3.1.2 Under certain circumstances (for example, when determining the low-reflectivity
...... Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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