A Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille Presentations
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...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2012-11-01
|
| Series: | Journal of Biomechanical Science and Engineering |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jbse/7/4/7_416/_pdf/-char/en |
| _version_ | 1811296764556214272 |
|---|---|
| author | Feng ZHAO Changan JIANG Hideyuki SAWADA |
| author_facet | Feng ZHAO Changan JIANG Hideyuki SAWADA |
| author_sort | Feng ZHAO |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T05:54:20Z |
| format | Article |
| id | doaj.art-a532606798d249ac81c149c158e6f257 |
| institution | Directory Open Access Journal |
| issn | 1880-9863 |
| language | English |
| last_indexed | 2024-04-13T05:54:20Z |
| publishDate | 2012-11-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Biomechanical Science and Engineering |
| spelling | doaj.art-a532606798d249ac81c149c158e6f2572022-12-22T02:59:41ZengThe Japan Society of Mechanical EngineersJournal of Biomechanical Science and Engineering1880-98632012-11-017441643210.1299/jbse.7.416jbseA Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille PresentationsFeng ZHAO0Changan JIANG1Hideyuki SAWADA2Faculty of Engineering, Kagawa UniversityRIKEN-TRI Collaboration Center for Human-Interactive Robot ResearchFaculty of Engineering, Kagawa UniversityIn 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.https://www.jstage.jst.go.jp/article/jbse/7/4/7_416/_pdf/-char/ensmabraillebraille displayvibrationvibration actuator |
| spellingShingle | Feng ZHAO Changan JIANG Hideyuki SAWADA A Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille Presentations Journal of Biomechanical Science and Engineering sma braille braille display vibration vibration actuator |
| title | A Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille Presentations |
| title_full | A Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille Presentations |
| title_fullStr | A Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille Presentations |
| title_full_unstemmed | A Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille Presentations |
| title_short | A Novel Braille Display Using the Vibration of SMA Wires and the Evaluation of Braille Presentations |
| title_sort | novel braille display using the vibration of sma wires and the evaluation of braille presentations |
| topic | sma braille braille display vibration vibration actuator |
| url | https://www.jstage.jst.go.jp/article/jbse/7/4/7_416/_pdf/-char/en |
| work_keys_str_mv | AT fengzhao anovelbrailledisplayusingthevibrationofsmawiresandtheevaluationofbraillepresentations AT changanjiang anovelbrailledisplayusingthevibrationofsmawiresandtheevaluationofbraillepresentations AT hideyukisawada anovelbrailledisplayusingthevibrationofsmawiresandtheevaluationofbraillepresentations AT fengzhao novelbrailledisplayusingthevibrationofsmawiresandtheevaluationofbraillepresentations AT changanjiang novelbrailledisplayusingthevibrationofsmawiresandtheevaluationofbraillepresentations AT hideyukisawada novelbrailledisplayusingthevibrationofsmawiresandtheevaluationofbraillepresentations |