Touching force response of the piezoelectric Braille cell

Touching force response of the piezoelectric Braille cell

Purpose. The objective of this research is to investigate dynamic responses of the piezoelectric Braille cell when it is subjected to both electrical signal and touching force. Method. Physical behavior of the piezoelectric actuator inside the piezoelectric Braille cell is analyzed. The mathematical...

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Bibliographic Details
Published in:Disability and rehabilitation: Assistive technology Vol. 3; no. 6; pp. 360 - 365
Main Authors: Smithmaitrie, Pruittikorn, Kanjantoe, Jinda, Tandayya, Pichaya
Format: Journal Article
Language:English
Published: England Informa UK Ltd 01-01-2008
Taylor & Francis
Subjects:
Adolescent
Adult
Blindness
Braille
Braille touching force
Child
Communication Aids for Disabled
Equipment Design
Female
Force
Humans
Male
Models, Theoretical
piezoelectric actuator
Piezoelectric Braille cell
Reading
Sensory Aids
Task Performance and Analysis
Technical aids
Thailand
Touch
Touch - physiology
Transducers
Visually Impaired Persons
Young Adult
Thailand
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Summary:Purpose. The objective of this research is to investigate dynamic responses of the piezoelectric Braille cell when it is subjected to both electrical signal and touching force. Method. Physical behavior of the piezoelectric actuator inside the piezoelectric Braille cell is analyzed. The mathematical model of the piezoelectric Braille system is presented. Then, data of visually impaired people using a Braille Note is studied as design information and a reference input for calculation of the piezoelectric Braille response under the touching force. Results. The results show dynamic responses of the piezoelectric Braille cell. The designed piezoelectric bimorph has a settling time of 0.15 second. The relationship between the Braille dot height and applied voltage is linear. The behavior of the piezoelectric Braille dot when it is touched during operation shows that the dot height is decreased as the force increases. Conclusions. The result provides understanding of the piezoelectric Braille cell behavior under both touching force and electrical excitation simultaneously. This is the important issue for the design and development of piezoelectric Braille cells in senses of controlling Braille dot displacement or force-feedback in the future.
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ISSN:1748-3107
1748-3115
DOI:10.1080/17483100802281442