A PROPOSAL AND EXAMINATION OF A NEWLY GUIDANCE METHOD IN INDOORS

Takao YanagiharaKinki University Faculty of Science and Engineering 　

Ken Kuwahata Kuwahata Design Office Co., Ltd.

Yoshiaki HaraResearcher Hyogo Institute Assistive Technology

Introduction

The previous research Nakamura et al. （ 2008,2009 ）　 The result showed that even in the

case of lower dot-shaped TWSIs as 3.4 mm height and bar-shaped TWSIs with 2.4 mm height, the detectability of them are similar to 5.0 mm height of TWSIs compliant with the JIS.

The subject of previous research

To examine the height of steps which have been the cause of the stumble, analyzed walking characteristics of elderly people. The result showed that the height of steps should be less than 2.4 mm.

Kuge et al. (1999)

Purpose of the research

Reducing barriers of TWSIs Maintaining the function of TWSIs.

The purpose of this study is to develop TWSIs having 2 mm height or less.

Target of this study

Indoor has little hazards compared with the outdoors.

Floors of indoor is comparatively flat.

TWSIS is not installed in the building well.

Warning patterns　　（ diameter 20mm ）　　　（ 30mm ）　 　　　（ 40mm ）

Square grid

Staggered row

50cm

50cm

Height 1mm 、 2mm

Guiding patterens

50cm

25cm

Height 1mm 、 2mm

Subjects

Visual Impairments total 25 people

Detection experiment1,2 (Warning patterns)

Detection experiment 1

Goal

6.0m

Start

Start Position

Tactile Position

Detection experiment 2

Detection experiment3,4(Guiding patterns)

10m

Detection experiment 3

Detection experiment 4

Result Detection experiment1~4

　　（ diameter 20mm ）　　　（ 30mm ）　 　　　（ 40mm ）

Staggered row

Guiding pattern:1,2,3 linesHeight: 1mm,2mm

Warning patternsArrangement:staggered row Height:1mm, 2mmDiameter:20mm,30mm

Detection experiment 5

90%100%

50%

90%

50%

70%

100%90% 90%

80%

50%60%

0%

20%

40%

60%

80%

100%

120%

φ20 φ30 φ20 φ30 φ20 φ30 φ20 φ30 φ20 φ30 φ20 φ30

1 1 2 2 3 3 1 1 2 2 3 3

9 10 5 9 5 7 10 9 9 8 5 6

Height 1㎜ Height 2㎜

Diameter

Numberof bars

（detection rate）

ｎ

Result （ Detection experiment 5 ）

3.2 3.5

2.8

3.4

2.6 3.0

3.6

4.1

3.3 3.6

3.2 2.8

1.0

2.0

3.0

4.0

5.0

φ20 φ30 φ20 φ30 φ20 φ30 φ20 φ30 φ20 φ30 φ20 φ30

1 1 2 2 3 3 1 1 2 2 3 3

9 10 5 9 5 7 10 9 9 8 5 6

Height 1㎜ Height 2㎜

Diffcultyof detection

DiameterNumberof bars

ｎ

CONCLUSIONIn order to secure the detection rate of 90% or more, two or one lines are needed.

However, in the experiment 3-4, the number of bars has good evaluation of three lines. Best combination is Guiding patterns is 2 mm height and 2 lineWarning pattern is staggered row and 2 mm height , and 20 mm and 30 mm diameter

Height 2mm

（ diameter 20mm ） （ 30mm）

幅（ 30mm ）

Thank You for Your Attention