GB/T 31887.2-2019 English PDF

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GB/T 31887.2-2019: Cycles -- Lighting and retro-reflective devices -- Part 2: Retro-reflective devices
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31887.2-2019	279	Add to Cart	3 days	Cycles -- Lighting and retro-reflective devices -- Part 2: Retro-reflective devices	Valid

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Basic data

Standard ID: GB/T 31887.2-2019 (GB/T31887.2-2019)
Description (Translated English): Cycles -- Lighting and retro-reflective devices -- Part 2: Retro-reflective devices
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y14
Classification of International Standard: 43.150
Word Count Estimation: 14,141
Date of Issue: 2019-10-18
Date of Implementation: 2020-05-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 31887.2-2019: Cycles -- Lighting and retro-reflective devices -- Part 2: Retro-reflective devices

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Cycles--Lighting and retro-reflective devices--Part 2. Retro-reflective devices ICS 43.150 Y14 National Standards of People's Republic of China Replace GB/T 31887-2015 Bicycle lighting and retroreflective device Part 2. Retroreflective device Part 2. Retro-reflectivedevices (ISO 6742-2.2015, MOD) Published on.2019-10-18 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General 1 4.1 Symbols and units used 1 4.2 Test sequence (reflector only) 3 5 Optical requirements 3 5.1 reflector 3 5.2 Reflexive tires 4 6 Chroma requirements 5 7 Physical requirements 6 7.1 reflector 6 7.2 Reflexive tires 6 8 Optical Test 8 8.1 General 8 8.2 reflector 9 8.3 Reflexive tires 10 9 Chroma Test 10 9.1 Instrument Measurement 10 9.2 Visual comparison method 10 9.3 Use of the method 10 10 mark 10 Reference 11

Foreword

GB/T 31887 "Bicycle Lighting and Retroreflective Device" is divided into the following five parts. --- Part 1. Lighting and light signal devices; --- Part 2. Retroreflective device; --- Part 3. Installation and use of illumination and retroreflective devices; --- Part 4. Bicycle lighting power supply lighting system; --- Part 5. Bicycles turn the lighting system that is not powered. This part is the second part of GB/T 31887. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 31887-2015 "Bicycle Reflecting Device", compared with GB/T 31887-2015, the main technical changes as follows. --- Modified the standard name; --- Revised the scope of the content (see Chapter 1, Chapter 1 of the.2015 edition); --- Added the terms and definitions of "reflexive tires" (see 3.4); --- Added the "test order (for reflectors only)" clause (see 4.2); ---Modified the optical requirements of the reflector, removed all the light intensity coefficient requirements of the observation angle α=0°20', modified the yellow and red The intensity coefficient of each incident angle of the color reflector at the observation angle α=1°30', and the decimal is an integer (see 5.1, 5.7 of the.2015 edition); ---Modified the optical requirements of the reflexive tire, deleted all the light intensity coefficient requirements of the observation angle α=0°20', increased the color Color requirements (see 5.2, 5.2 of the.2015 edition); --- Modified the chromaticity coordinates of yellow and white (see Table 7 and Figure 2 in Chapter 6, Table 6 and Figure 2 in Chapter 6 of the.2015 edition); --- Modified the temperature test requirements (see 7.1.2.2, 7.1.2.2 of the.2015 version); --- Removed the note from the "Foot Reflexor Elimination of This Test" in the impact test (see 7.1.2.3 of the.2015 edition); --- Removed the reflector alignment test (see 7.1.2.5 for the.2015 edition); --- Revised the impact resistance requirements of retroreflective tires (see 7.2.2.3, 7.2.2.5 of the.2015 edition); --- Modified the reflex reflection tire immersion test, removed the light intensity coefficient (CIL) value of α=0°20' and β=-4° after immersion test (See 7.2.2.8, 7.2.2.9 of the.2015 edition); --- Removed the corrosion resistance requirements for retroreflective tires (see 7.2.2.6 of the.2015 edition); --- Modified the reflection test area (see 8.2.3, 8.7 of the.2015 version). This section uses the redrafting method to modify the use of ISO 6742-2.2015 "Bicycle lighting and retroreflective devices" Part 2. Back Complex reflection device. The technical differences between this part and ISO 6742-2.2015 and their reasons are as follows. ---About the scope, use "especially two-wheel bicycle and GB 17761 electric in accordance with GB 3656 (all parts) and GB 14746 "Bicycle" replaces "especially for two-wheel bicycles in accordance with ISO 4210 and ISO 8098" to suit the bicycle production in China. Product standard requirements; ---About the normative reference documents, deleted ISO 9227 to adapt to the technical conditions of our country; ---ISO 6742-2.2015 divides the "optical requirements" into groups A and B, which are selected by countries according to actual conditions. This part Group B content of "5 Optical Requirements" in ISO 6742-2.2015; --- Removed the Group A content of "5 Optical Requirements" in ISO 6742-2.2015; ---Modified "8.1.2 Light source", "8.1.3 Receiver", "8.1.4 Observation distance" in ISO 6742-2.2015 "8.1.5 Reflector The terms "illuminance" and "8.2.4 orientation of the reflector" remove the contents of the reflective spoke or spoke box. This section has made the following editorial changes. --- This section incorporates the amendments to ISO 6742-2.2015/Amd.1.2018, for ordinary reflectors and red and yellow The corner reflector has a light intensity coefficient of the incident angle β when the observation angle α is 1°30' (see Tables 3 and 4); --- After removing ISO 6742-2.2015, Table 3, Table 7, Table 9, Table 10, the serial number of the table is reordered; --- Revised references. This part was proposed by the China Light Industry Federation. This part is under the jurisdiction of the National Bicycle Standardization Technical Committee (SAC/TC155). This section drafted by. Kunshan Huimei Huade Hardware Products Co., Ltd., Kunshan Jinxi Plastic Products Co., Ltd., Saitelite (Buddha Shan) Plastic Products Co., Ltd., Yantai Changhong Plastic Products Co., Ltd., National Bicycle Standardization Center, Jiaxing Starway Electronics Co., Ltd. Shanghai Xinpu Plastic Products Factory, Zhongce Rubber Group Co., Ltd., Jianda Rubber (China) Co., Ltd., Giant (China) Co., Ltd., Taiwan City Luqiao Xiongxin Motorcycle Parts Co., Ltd., Kunshan Product Safety Inspection Institute, National Light Electric Vehicle and Battery Product Quality Supervision and Inspection Heart, Taizhou Quality and Technology Supervision and Inspection Institute, Tianjin Bicycle Research Institute. The main drafters of this section. Yan Li, Xu Bin, Zhang Yonghua, Li Dechao, Yao Li, Yu Yingchun, Zhu Weixiang. The previous versions of the standards replaced by this section are. ---GB/T 31887-2015. Bicycle lighting and retroreflective device Part 2. Retroreflective device

1 Scope

This part of GB/T 31887 specifies the optical and physical requirements for retroreflective devices. This section applies to bicycles used on public roads, especially for two rounds in accordance with GB 3565 (all parts) and GB 14746. Retroreflective devices for driving and GB 17761 electric bicycles.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. CIE15 Colorimetry CIE1931 Color Space (ColorSpace)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Retroreflective device retro-reflectivedevice Reflector reflector An off-the-shelf component consisting of one or more retroreflective optical units. 3.2 Wide-angle reflector wideanglereflector A means for retroreflection can be made for light from a horizontal incident angle of not less than 50° on either side of the reference axis. 3.3 Ordinary reflector conventionalreflector A means for retroreflecting light from an angle of incidence of not less than 20° from both sides of the reference axis. 3.4 Retroreflective tire retro-reflectivetyre A usable tire having a molded annular return reflection band on both side walls.

4 General

4.1 Symbols and units used The symbol is shown in Figure 1, and its meaning and unit are shown in Table 1. ......

Image     

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