GB/T 23828-2023 English PDF (GBT23828-2023)

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GB/T 23828-2023: Light-emitting diode changeable message signs of motorway
GB/T 23828-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 03.220.20;93.080.30
CCS R 85
Replacing GB/T 23828-2009
Light-emitting diode changeable message signs of motorway
ISSUED ON: MARCH 17, 2023
IMPLEMENTED ON: OCTOBER 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 7
4 Classification, composition and model ... 9
5 Technical requirements ... 10
6 Test methods ... 21
7 Inspection rules ... 32
8 Marks, packaging, transportation and storage ... 35
Annex A (normative) Data exchange format ... 37
Bibliography ... 54
Light-emitting diode changeable message signs of motorway
1 Scope
This document specifies the classification, composition and model, technical
requirements, test methods, inspection rules, as well as signs, packaging, transportation
and storage for light-emitting diode (LED) changeable message signs of motorway.
This document applies to the production, use and inspection for light-emitting diode
changeable message signs of motorway.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 191, Packaging and storage marks
GB/T 2312, Code of Chinese graphic character set for information interchange -
Primary set
GB/T 2423.1, Environmental testing for electric and electronic products - Part 2:
Test methods - Tests A: Cold
GB/T 2423.2, Environmental testing for electric and electronic products - Part 2:
Test methods - Tests B: Dry heat
GB/T 2423.3, Environmental testing - Part 2: Testing method - Test Cab: Damp heat,
steady state
GB/T 2423.10, Environmental testing - Part 2: Test methods - Test Fc: Vibration
(sinusoidal)
GB/T 2423.17, Environmental testing for electric and electronic products - Part 2:
Test method - Test Ka: Salt mist
GB/T 2423.22, Environmental testing - Part 2: Test methods - Test N: Change of
temperature
GB/T 3681.1, Plastics - Methods of exposure to solar radiation - Part 1: General
guidance
well as the followings apply.
3.1 LED changeable message signs
The equipment that the full screen uses LED as the light-emitting unit, which can
change different traffic information on the display screen through automatic or manual
control.
3.2 pixel
The smallest imaging unit of LED variable information signs.
3.3 LED panel
It is composed of one or several display modules, which can be controlled by the display
control system to complete the screen display.
[Source: SJ/T 11141-2017, 3.2]
3.4 dotpitch
The center-to-center distance between adjacent pixels.
3.5 half-intensity angle
The minimum angle between the measuring optical axis when the luminous intensity
of a single LED is half of its maximum luminous intensity and the measuring optical
axis of the maximum luminous intensity.
3.6 angle of deflection
The angle between the measuring optical axis of the maximum luminous intensity of a
single LED and the normal optical axis.
3.7 viewing angle
The maximum distance that the observer (normal person, with corrected vision of 1.0
or above) can correctly read the content of the sign within the specified distance, after
deviating from the normal direction of the sign surface, under the condition that the
ambient illuminance is greater than 50,000 lx on a sunny day and the sun shines on the
sign surface.
3.8 static distinguishing distance
The maximum distance that the observer (normal person, with corrected vision of 1.0
or above) can correctly read the content of the sign within the specified viewing angle
under the condition that the ambient illuminance is greater than 50,000 lx on a sunny
day and the sun shines on the sign surface.
The insulation resistance between the power terminal and the casing of the LED
changeable message sign of motorway shall not be less than 100 MΩ.
5.9.2 Electric strength
Apply a sinusoidal AC voltage with a frequency of 50 Hz and an effective value of 1500
V between the power terminal of the highway LED variable information sign and the
casing for 1 min. There shall be no flashover or breakdown.
5.9.3 Safety grounding
LED changeable message signs of motorway shall be equipped with safety protection
grounding terminals. The grounding terminal is reliably connected to the casing
(including the metal casing of the live parts). The connection resistance between the
ground terminal and the casing shall be less than 0.1 Ω.
5.9.4 Power adaptability
LED changeable message signs of motorway shall adapt to the requirements of power
grid fluctuations, and shall work normally under the following conditions:
- Voltage: AC 220 V ± 33 V;
- Frequency: 50 Hz ± 2 Hz.
5.9.5 Contact current
When the LED changeable message sign of motorway is working, the contact current
between the power terminal and the ground terminal shall be less than 3.5 mA.
5.9.6 Lightning protection and overvoltage protection
Necessary lightning protection and overvoltage protection measures shall be taken for
LED changeable message signs of motorway. The interfaces, components and
protective measures adopted shall meet the requirements of GB/T 18802.11.
5.10 Degree of protection for casing
Rainproof and dustproof measures shall be taken for LED changeable message signs of
motorway. The protection level of the casing shall not be lower than IP56 according to
the provisions of GB/T 4208-2017. The protection level of the casing of the LED
changeable message sign of motorway applied in the tunnel environment shall be IP66.
5.11 Electromagnetic compatibility
5.11.1 Surge immunity
It shall meet the requirements of GB/T 9254.2.
5.11.2 Electrostatic discharge immunity
Conduct electrostatic discharge immunity tests on the points and surfaces that operators
may touch when using the LED changeable message signs of motorway, as well as user
maintenance points. The product shall work normally.
5.11.3 Immunity to radio frequency electromagnetic field radiation
Carry out the radio frequency electromagnetic field radiation immunity test on the four
sides of the LED changeable message sign of motorway in normal operation at the
vertical polarization and horizontal polarization positions of the transmitting antenna,
respectively. The product shall work normally.
5.11.4 Electrical fast transient burst immunity
Conduct electrical fast transient burst immunity test on the power port, signal and
control port of the LED changeable message sign of motorway and the grounding wire
of the chassis. The product shall work normally.
5.12 Mechanical properties
The structure of LED changeable message signs of motorway shall be stable. After
bearing the wind pressure generated by the wind speed of 40 m/s, the deformation shall
not be greater than 2 mm, and the performance of the sign board shall not be affected.
5.13 Communication interface and procedures
5.13.1 The interface shall use an Ethernet interface with a rate not lower than 100 Mbit/s.
It shall comply with the regulations of 100BASE-TX in IEEE 802.3-2018.
5.13.2 When providing other interfaces and procedures, detailed interface parameters
and communica...