A Novel Braille display using the vibration of SMA wires and the evaluation of Braille presentations

Feng Zhao, Changan Jiang, Hideyuki Sawada

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this study, a new Braille display is constructed based on the vibration of a Shape Memory Alloy (SMA) wire. To present Braille information, a vibration actuator is used instead of conventional Braille dots. According to the temperature-dependent characteristic shrinkage and the vest ration to the initial length of an SMA wire, a vibration actuator which can be driven by several [Hz]-100 [Hz] pulse signals has been developed. A method for presenting Braille information is proposed by the application of the developed actuator to a Braille display. In this research, multiple actuators constructed by using metal pins (0.7 [mm] in diameter, 3 [mm] in length) and SMA wires (50 [um] in diameter, 3 [mm] in length), are placed as to form standard Braille. The actuators are vibrated by PWM signals with different frequencies and appropriate timings, and the effectiveness of the proposed method for Braille display is verified by experiments. From the experimental results, the highest recognition rate of 100 [%] was achieved under the conditions of 50 [Hz] vibration frequency and 500 [ms] time delay. This means the vibration patterns effectively stimulated the Meissner corpuscles, and helped the subjects properly discriminate Braille characters presented by the developed display. Good evaluations were received from the subjects who are visually-impaired.

Original languageEnglish
Pages (from-to)416-432
Number of pages17
JournalJournal of Biomechanical Science and Engineering
Volume7
Issue number4
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Shape memory effect
Actuators
Wire
Display devices
Pulse width modulation
Time delay
Metals
Experiments
Temperature

Keywords

  • Braille
  • Braille display
  • SMA
  • Vibration
  • Vibration actuator

ASJC Scopus subject areas

  • Biomedical Engineering

Cite this

A Novel Braille display using the vibration of SMA wires and the evaluation of Braille presentations. / Zhao, Feng; Jiang, Changan; Sawada, Hideyuki.

In: Journal of Biomechanical Science and Engineering, Vol. 7, No. 4, 2012, p. 416-432.

Research output: Contribution to journalArticle

@article{0087bfa73ed349c4a0cb67306d07fe15,
title = "A Novel Braille display using the vibration of SMA wires and the evaluation of Braille presentations",
abstract = "In this study, a new Braille display is constructed based on the vibration of a Shape Memory Alloy (SMA) wire. To present Braille information, a vibration actuator is used instead of conventional Braille dots. According to the temperature-dependent characteristic shrinkage and the vest ration to the initial length of an SMA wire, a vibration actuator which can be driven by several [Hz]-100 [Hz] pulse signals has been developed. A method for presenting Braille information is proposed by the application of the developed actuator to a Braille display. In this research, multiple actuators constructed by using metal pins (0.7 [mm] in diameter, 3 [mm] in length) and SMA wires (50 [um] in diameter, 3 [mm] in length), are placed as to form standard Braille. The actuators are vibrated by PWM signals with different frequencies and appropriate timings, and the effectiveness of the proposed method for Braille display is verified by experiments. From the experimental results, the highest recognition rate of 100 [{\%}] was achieved under the conditions of 50 [Hz] vibration frequency and 500 [ms] time delay. This means the vibration patterns effectively stimulated the Meissner corpuscles, and helped the subjects properly discriminate Braille characters presented by the developed display. Good evaluations were received from the subjects who are visually-impaired.",
keywords = "Braille, Braille display, SMA, Vibration, Vibration actuator",
author = "Feng Zhao and Changan Jiang and Hideyuki Sawada",
year = "2012",
doi = "10.1299/jbse.7.416",
language = "English",
volume = "7",
pages = "416--432",
journal = "Journal of Biomechanical Science and Engineering",
issn = "1880-9863",
publisher = "Japan Society of Mechanical Engineers",
number = "4",

}

TY - JOUR

T1 - A Novel Braille display using the vibration of SMA wires and the evaluation of Braille presentations

AU - Zhao, Feng

AU - Jiang, Changan

AU - Sawada, Hideyuki

PY - 2012

Y1 - 2012

N2 - In this study, a new Braille display is constructed based on the vibration of a Shape Memory Alloy (SMA) wire. To present Braille information, a vibration actuator is used instead of conventional Braille dots. According to the temperature-dependent characteristic shrinkage and the vest ration to the initial length of an SMA wire, a vibration actuator which can be driven by several [Hz]-100 [Hz] pulse signals has been developed. A method for presenting Braille information is proposed by the application of the developed actuator to a Braille display. In this research, multiple actuators constructed by using metal pins (0.7 [mm] in diameter, 3 [mm] in length) and SMA wires (50 [um] in diameter, 3 [mm] in length), are placed as to form standard Braille. The actuators are vibrated by PWM signals with different frequencies and appropriate timings, and the effectiveness of the proposed method for Braille display is verified by experiments. From the experimental results, the highest recognition rate of 100 [%] was achieved under the conditions of 50 [Hz] vibration frequency and 500 [ms] time delay. This means the vibration patterns effectively stimulated the Meissner corpuscles, and helped the subjects properly discriminate Braille characters presented by the developed display. Good evaluations were received from the subjects who are visually-impaired.

AB - In this study, a new Braille display is constructed based on the vibration of a Shape Memory Alloy (SMA) wire. To present Braille information, a vibration actuator is used instead of conventional Braille dots. According to the temperature-dependent characteristic shrinkage and the vest ration to the initial length of an SMA wire, a vibration actuator which can be driven by several [Hz]-100 [Hz] pulse signals has been developed. A method for presenting Braille information is proposed by the application of the developed actuator to a Braille display. In this research, multiple actuators constructed by using metal pins (0.7 [mm] in diameter, 3 [mm] in length) and SMA wires (50 [um] in diameter, 3 [mm] in length), are placed as to form standard Braille. The actuators are vibrated by PWM signals with different frequencies and appropriate timings, and the effectiveness of the proposed method for Braille display is verified by experiments. From the experimental results, the highest recognition rate of 100 [%] was achieved under the conditions of 50 [Hz] vibration frequency and 500 [ms] time delay. This means the vibration patterns effectively stimulated the Meissner corpuscles, and helped the subjects properly discriminate Braille characters presented by the developed display. Good evaluations were received from the subjects who are visually-impaired.

KW - Braille

KW - Braille display

KW - SMA

KW - Vibration

KW - Vibration actuator

UR - http://www.scopus.com/inward/record.url?scp=84872864163&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84872864163&partnerID=8YFLogxK

U2 - 10.1299/jbse.7.416

DO - 10.1299/jbse.7.416

M3 - Article

VL - 7

SP - 416

EP - 432

JO - Journal of Biomechanical Science and Engineering

JF - Journal of Biomechanical Science and Engineering

SN - 1880-9863

IS - 4

ER -