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GBZ41921-2022: Assistive products for blind and vision-impaired persons - Tactile walking surface indicators
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Assistive products for blind and vision-impaired persons - Tactile walking surface indicators
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Basic data | Standard ID | GB/Z 41921-2022 (GB/Z41921-2022) | | Description (Translated English) | Assistive products for blind and vision-impaired persons - Tactile walking surface indicators | | Sector / Industry | National Standard | | Classification of Chinese Standard | C45 | | Classification of International Standard | 03.080 | | Word Count Estimation | 38,367 | | Date of Issue | 2022-10-14 | | Date of Implementation | 2023-02-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GBZ41921-2022: Assistive products for blind and vision-impaired persons - Tactile walking surface indicators
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GB /Z 41921-2022
Assistive products for blind and vision-impaired persons -- Tactile walking surface indicators
ICS 03.080
CCSC45
National Standardization Guiding Technical Document of the People's Republic of China
Assistive devices for the visually impaired
(ISO 23599.2019, MOD)
Published on 2022-10-12
2023-02-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 General Terms 2
4.1 General guideline 2
4.2 Detection and differentiation of blind lanes 3
5 Requirements and Recommendations 3
5.1 Specifications for the shape and size of blind lanes 3
5.2 Surrounding or adjacent ground 7
5.3 Visual comparison 8
5.4 Materials 9
5.5 Installation 9
Appendix A (Informative) Brightness Contrast 11
Appendix B (Informative) Specific Installation Example of Blind Road 13
Appendix C (informative) Changes in the structure of this document compared to ISO 23599.201929
Appendix D (informative) Technical differences between this document and ISO 23599.2019 and their reasons31
Reference 32
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document is modified and adopted ISO 23599.2019 "Blind Road for Assistive Devices for the Visually Impaired".
Compared with ISO 23599.2019, this document has made relevant structural adjustments, see Appendix C. This document is consistent with ISO 23599.2019
The technical differences and reasons for the ratio are shown in Appendix D.
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by the Ministry of Civil Affairs of the People's Republic of China.
This document is under the jurisdiction of the National Technical Committee on Standardization of Rehabilitation and Special Equipment for Persons with Disabilities (SAC/TC148).
This document is drafted by. China Rehabilitation Assistive Devices Association, North China University of Technology, National Research Center for Rehabilitation Assistive Devices, Beijing Tongren Hospital,
Zhongke Standard (Ningde) Technology Co., Ltd., Beijing School for the Blind, Hanwang Technology Co., Ltd., Hebei University of Technology, Beijing Guohongkang Medical Electronics
Sub-Instruments Co., Ltd.
The main drafters of this document. Zhang Xiaoyu, Wang Jingzhong, Lu Yuanyao, Gao Jie, Lin Ying, Zhang Pengcheng, Dong Zhiqian, Ma Yan, Hu Ailian, Li Qingzhong,
Tong Lijing, Feng Yi, Zeng Fanfeng, Xiao Ke, Song Lihua, Tan Chaokang.
Introduction
Visually impaired people encounter various problems and dangers when they travel independently. In the process of walking, the visually impaired need to acquire natural or artificial touch, hearing,
Sight and vision help with environmental information. However, environmental information is not always available reliably. Therefore, the use of blind sticks, shoe soles, residual vision
Blind path technology for perception has developed rapidly. Currently, there are many forms of blind trails, soles or blind sticks in the market that detect the difference in effect
Not all the same. Therefore, use the comprehensive results of current scientific technology and experience to define the characteristics of the blind road and help potential users to detect
and identification is necessary.
The purpose of this document is to establish the technical requirements for blind roads for the visually impaired, and is committed to establishing a common international standard basis for blind roads, taking into account some
Necessary differences to accommodate the climatic, geographical and other characteristics of certain regions.
Assistive devices for the visually impaired
1 Scope
This document provides general terms, requirements and recommendations for blind roads.
This document applies to walking trails for visually impaired persons.
2 Normative references
There are no normative references in this document.
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Cue the blind road attentionpattern
The surface is in the shape of a dot, and is used at the beginning, turning, ending point of the blind road, or to indicate the location of service facilities and to remind the visually impaired to move forward.
There is an unsafe or dangerous state, etc., with the function of reminding the blind road (3.16).
3.2
Buried edge stone at-gradekerb
A kerb where the edge of the sidewalk is flush with the adjacent driveway.
NOTE. See Figure B.10 and Figure B.11.
3.3
CIEYValueCIEYValue
Tristimulus values of reflective objects in the CIE1931 standard chromaticity system.
Note 1.The CIEY value is equal to the percentage value of light reflectance.
Note 2.Y=0 represents the reflectivity of an absolutely black object (no light reflection). Y=100 means a perfect white object reflectivity (no light is absorbed
or transmission).
3.4
key point decisionpoint
An intersection or turn in a walking path.
3.5
discreteunits
Spheres, cones or elongated bars embedded in the bottom or base plate.
3.6
effective depth
The distance between the detectable edges of the blind lane.
Note. The measurement direction is the main travel direction.
3.7
effectivewidth effectivewidth
The distance between the detectable edges of the blind lane.
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