GB/T 31446-2015 PDF English
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GB/T 31446-2015: LED active light-emitting road traffic signs---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT31446-2015
ICS 03.220.20
R 85
GB
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
LED active light-emitting road traffic signs
Issued on: MAY 15, 2015
Implemented on: AUGUST 01, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Classification and composition ... 7
5 Technical requirements ... 8
6 Test methods ... 13
7 Inspection rules ... 18
8 Identification, packaging, transportation and storage ... 20
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by AND shall be under the jurisdiction of the
National Traffic Engineering Facilities (Highway) Standardization Technical
Committee (SAC/TC 223).
This standard is responsibly drafted by the Ministry of Transport Highway
Science Research Institute, Nanjing Saikang Transportation Industry Co., Ltd.
The participating drafting organizations are the National Traffic Safety Facilities
Quality Supervision and Inspection Center, Tangshan City Traffic Survey and
Design Institute Co., Ltd., Beijing Hua’an Technology Co., Ltd.
The main drafters of this standard. Yang Yong, Han Wenyuan, Liu Gan, Zhu
Chuanzheng, Liu Hongqi, Wang Lei, Ding Bolin, Zhao Yonghui, Ma Maojun,
Zou Junjun, Yin Jie.
LED active light-emitting road traffic signs
1 Scope
This standard specifies the classification and composition, technical
requirements, test methods, inspection rules and marking, packaging,
transportation and storage of LED active light-emitting road traffic signs
(abbreviated as "light-emitting signs").
This standard applies to the LED active light-emitting road traffic signs which
are energized by the power grid or solar power, AND other light-emitting signs
may make reference to this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 191 Packaging – Pictorial marking for handling of goods
GB/T 2423.1 Environmental testing of electric and electronic products - Part
2. Test methods - Test A. Cold
GB/T 2423.2 Environmental testing of electric and electronic products - Part
2. Test methods - Test B. Dry heat
GB/T 2423.3 Environmental testing of electric and electronic products - Part
2. Test methods - Test Cab. Damp heat steady state
GB/T 2423.10 Environmental testing for electric and electronic products -
Part 2. Test methods - Test Fc. Vibration (sinusoidal)
GB/T 2423.17 Environmental testing for electric and electronic products -
Part 2. Test methods - Test Ka. Salt mist
GB 4208 Degrees of protection provided by enclosure (IP code)
GB/T 5080.7 Equipment reliability testing – Compliance test plans for failure
rate and mean time between failures assuming constant failure rate
GB 5768.2 Road traffic signs and marking - Part 2. Road traffic signs
3.4
Static distinguishing distance
It refers to, in the sunny day when the ambient illuminance is more than
50000 lx AND the sunlight directly irradiates on the front surface of the sign,
the maximum distance at which the observer (normal person, corrected
visual acuity 1.0 or more) can correctly distinguish the sign information within
the specified viewing angle.
3.5
Dynamic distinguishing distance
It refers to, in the sunny day when the ambient illuminance is more than
50000 lx, the sunlight directly irradiates on the front surface of the sign, AND
the driving speed is 120 km/h, the maximum distance at which the observer
(normal person, corrected visual acuity 1.0 or more) can correctly distinguish
the sign information within the specified viewing angle.
3.6
Standard test conditions for solar cell
The standard test conditions for solar cells are. ambient temperature (25 ±
2) °C; the irradiance of light source as measured using the standard solar
cell is 1000 W/m2; AND it has standard solar spectral irradiance distribution.
3.7
Full charge
It refers to a state of battery charging under which, even though the charging
is conducted at the selected conditions, all the available active substances
will not significantly increase the capacity.
3.8
Full capacity work time
Tcf25, Tcf0
It refers to the continuous and effective work time of the solar powered light-
emitting traffic signs which can be guaranteed by the fully charged battery
pack under the conditions that the charging circuit is disconnected. The
subscript number of Tcf25 and Tcf0 refers to the work environment temperature.
5 Technical requirements
5.1 Applicable conditions
5.1.1 Installation environment. outdoors.
5.1.2 Relative humidity. not more than 98%.
5.1.3 Ambient temperature.
- Grade A. -20 °C ~ +55 °C;
- Grade B. -40 °C to +50 °C;
- Grade C. -55 °C ~ +45 °C.
5.2 Material requirements
5.2.1 Such structural parts of the light-emitting signs as enclosure and
baseplate, etc., shall, under the conditions of ensuring the structural stability,
use the light metal or non-metal materials which comply with GB/T 23827, in
order to reduce product weight and corrosion resistance ability.
5.2.2 The normal luminous intensity of single-type LED at the rated current. red
is not less than 5000 mcd, yellow is not less than 3000 mcd, white is not less
than 6000 mcd; AND the LED half-intensity angle θ1/2 is not less than 12.5 °.
5.2.3 The performance of the retro-reflective materials as used for the light-
emitting signs shall comply with the relevant requirements of GB/T 23827.
5.2.4 The mean time between failures MTBF of the LED shall be not less than
50000 h, AND the MTBF of other electronic components shall be not less than
30000 h.
5.3 Sign layout
5.3.1 The shape, dimension, pattern of the light-emitting signs AND the
character and color of the retro-reflective material shall comply with the relevant
requirements of GB 5768.2. AND the sign information as shown on the active
light-emitting unit and the retro-reflective material baseplate shall be consistent.
5.3.2 The color of the active light-emitting unit of different types of road traffic
signs shall comply with the requirements below.
- The color of the active light-emitting unit of the warning sign and the work
area sign is yellow;
5.5.2 Chromaticity performance of retro-reflective materials
The chromaticity indicators of the retro-reflective material for the light-emitting
sign shall comply with the requirements of GB/T 23827.
5.6 Dimming function
The light-emitting sign product shall have the environmental illumination
detection device, AND be able to, based on the environmental illumination,
automatically adjust the brightness of the light-emitting sign, in order to avoid
glare when the environmental illumination is relatively low.
5.7 Distinguishing performance
5.7.1 Distinguishing distance
The distinguishing distance of the light-emitting sign is divided into static
distinguishing distance and dynamic distinguishing distance, the requirements
are as follows.
a) The static distinguishing distance shall not be less than 250 m;
b) The dynamic distinguishing distance shall not be less than 210 m.
5.7.2 Viewing angle
Under the conditions as specified in 5.7.1, the viewing angle of the light-emitting
sign product shall be not less than 30 °.
5.7.3 Light-emitting uniformity
The light emitted from the active light-emitting unit of the sign shall be uniform,
AND under the rated operating current, the un-uniformity of the normal light-
emitting intensity between the pixels of the same-color active light-emitting unit
within the entire range of the sign shall be not more than 10%.
5.8 Electrical safety performance of power grid powered signs
5.8.1 Insulation resistance. the insulation resistance between the power supply
terminal and the enclosure of the light-emitting sign product shall not be less
than 100 MΩ.
5.8.2 Electrical strength. between the power supply terminal and the enclosure
of the light-emitting sign product, if applying the sinusoidal AC voltage for which
the frequency is 50 Hz AND the effective voltage is 1500 V, after 1 min, it shall
be free from spark, flashover or breakdown, AND the leakage current shall be
not more than 5 mA.
It is preferable for the light-emitting sign product to use the light metal (such as
aluminium alloy) or steel metal trim, AND the product shall be stable in structure;
under the wind pressure generated by the 40 m/s wind, the utilization
performance of the product will not be affected, AND the resulting geometric
deformation shall not be greater than 2 mm.
5.11 Environmental adaptability
5.11.1 Low temperature performance
The light-emitting sign product shall, under the energized working state (the
solar powered light-emitting sign product i...
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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