An Evaluation of Human Sensibility on Perceived Texture under Variation of Vibrotactile Stimuli using a Tactile Display System

2006 ◽  
Author(s):  
Seung-Chan Kim ◽  
Ki-Uk Kyung ◽  
Jin-Hun Sohn ◽  
Dong-Soo Kwon
Keyword(s):  
Tactile Display ◽  
Display System ◽  
Human Sensibility

Challenges in Development of Sub-Millimeter Resolution Thermo-Fluidic Actuator Based Wearable Tactile Display System for Blind Individuals

2011 ◽  
Author(s):  
Prakash C. R. J. Naidu ◽  
Ramesh Yechangunja ◽  
Andrea Prosperetti ◽  
Mandayam A. Srinivasan
Keyword(s):  
Spatial Resolution ◽  
Bubble Formation ◽  
Tactile Display ◽  
Switching Frequency ◽  
Display System ◽  
Prototype Development ◽  
Fluidic Actuators ◽  
Spatio Temporal ◽  
Human Finger ◽  
Blind Individuals

This paper presents the work conducted towards the realization of a novel tactile display system composed of miniature thermo-fluidic actuators. An application of the system particularly relevant to blind individuals is communication with computers through touch. The development of programmable spatio-temporal pattern of touch actuation based on bubble formation and vapor pressure has remarkable scope, not only because of the flexibility and wearability but also the high levels of motion amplitude and force of actuation not achieved so far by other means. The design specifications of the tactile display involved packaging of the miniature actuators in such a manner that the display can be conveniently attached at the tip of the human finger with desirable spatial resolution, and achieving the optimum force that can be felt through the human finger. However, there were challenges that were faced by the authors while miniaturizing the actuators for suitability in sub-millimeter spatial resolution desirable for the tactile display. The paper reports on the design, prototype development and experimental results and brings out the limitations along with possible solutions being pursued by the authors. The progressive efforts through fabrication and testing of different prototype thermo-fluidic actuators ranging from 3mm diameter bore to sub-millimeter sizes and the corresponding difficulties faced in the form of cooling requirements, hysteresis effects, and fabrication challenges are elucidated. The paper reports on packaging of actuators as an array of tiny tubes spaced as close as possible, and establishment of parameters, namely, amplitude of actuation and switching frequency, along with force generation adequate for tactile perception.

Configuration of a Novel Sub-Millimeter Resolution Piezoelectric Actuator Based Wearable Tactile Display System for Blind Individuals

2011 ◽  
Author(s):  
Prakash C. R. J. Naidu ◽  
Ramesh Yechangunja ◽  
Mandayam A. Srinivasan
Keyword(s):  
Piezoelectric Actuators ◽  
Body Part ◽  
Tactile Display ◽  
Significant Feature ◽  
Block Type ◽  
Display Device ◽  
Display System ◽  
Potential Applications ◽  
Blind Individuals ◽  
General Communication

This paper presents the work conducted towards the realization of a novel tactile display system, first using block type piezoelectric actuators and later using cantilever type piezoelectric actuators. The system is particularly useful for blind users to communicate with computers through touch, but also has many potential applications in several other fields such as virtual reality, gaming, and other general communication interfaces for sighted users. Although piezoelectric actuators have been used in the past in electronic Braille and other systems, there is no reported configuration that can achieve sub-millimeter center-to-center resolution in an array of programmable actuation pins that act as interfaces in contact with a human body part such as a finger. This paper reports development of a wearable tactile display device: (a) built of block type actuators and its characterization showing that the perception was not adequate for certain purposes; (b) further, a novel arrangement with considerable improvement in perception wherein- (i) two or more vibrating stimulation pins can be located close to each other at the plane of contact with a finger, and (ii) actuated by means of piezoelectric bending elements arranged in a cantilever configuration partially overlapping each other in multiple planes. A significant feature of the unique configuration reported in this paper is that vibratory stimulation can be achieved at finer spatial resolutions than hitherto achieved.

scholarly journals A Basic Study on a Tactile Display System for Presenting Quality of Materials

1997 ◽  
Vol 117 (8) ◽  
pp. 1062-1068 ◽  
Author(s):  
Shuichi INO ◽  
Tohru IFUKUBE ◽  
Chikamune WADA ◽  
Takeshi TSURUGA ◽  
Takashi IZUMI ◽  
...  
Keyword(s):  
Tactile Display ◽  
Display System ◽  
Basic Study

A Tactile Display System in the Use of a PC for Individuals Who Are Deaf-Blind

2004 ◽  
pp. 1129-1136 ◽  
Author(s):  
Masatsugu Sakajiri ◽  
Shinich Okada ◽  
Kazuyuki Ito ◽  
Atsushi Sadakane ◽  
Naoki Sugiyama ◽  
...  
Keyword(s):  
Tactile Display ◽  
Display System

A Multiparameter Tactile Display System for Teleoperation

1995 ◽  
Vol 28 (15) ◽  
pp. 83-88
Author(s):  
Dimitrios A. Kontarinis ◽  
Robert D. Howe
Keyword(s):  
Tactile Display ◽  
Display System
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