The Design and Deployment of a Wearable Vibrotactile Feedback System

2004 ◽  
Author(s):  
R.W. Lindeman ◽  
J.L. Sibert ◽  
C.E. Lathan ◽  
J.M. Vice
Keyword(s):  
Feedback System ◽  
Vibrotactile Feedback

Vibrotactile Feedback System from the Fingertip to the Temples for Perceptual Enhancement of Contracture Palpation

2021 ◽  
pp. 1-1
Author(s):  
Kazuhiro Niwa ◽  
Yoshihiro Tanaka ◽  
Kota Kitamichi ◽  
Takumi Kuhara ◽  
Kimihiro Uemura ◽  
...  
Keyword(s):  
Feedback System ◽  
Vibrotactile Feedback

scholarly journals Assessment of Intuitiveness and Comfort of Wearable Haptic Feedback Strategies for Assisting Level and Stair Walking

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1676
Author(s):  
Ilaria Cesini ◽  
Giacomo Spigler ◽  
Sahana Prasanna ◽  
Jessica D’Abbraccio ◽  
Daniela De Luca ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Haptic Feedback ◽  
Ground Level ◽  
Feedback System ◽  
Evaluation Procedure ◽  
Vibrotactile Feedback ◽  
Foot Placement ◽  
Feedback Strategies ◽  
Stair Walking ◽  
Design And Testing

Nowadays, lower-limb prostheses are reaching real-world usability especially on ground-level walking. However, some key tasks such as stair walking are still quite demanding. Providing haptic feedback about the foot placement on the steps might reduce the cognitive load of the task, compensating for increased dependency on vision and lessen the risk of falling. Experiments on intact subjects can be useful to define the feedback strategies prior to clinical trials, but effective methods to assess the efficacy of the strategies are few and usually rely on the emulation of the disability condition. The present study reports on the design and testing of a wearable haptic feedback system in a protocol involving intact subjects to assess candidate strategies to be adopted in clinical trials. The system integrated a sensorized insole wirelessly connected to a textile waist belt equipped with three vibrating motors. Three stimulation strategies for mapping the insole pressure data to vibrotactile feedback were implemented and compared in terms of intuitiveness and comfort perceived during level and stair walking. The strategies were ranked using a relative rating approach, which highlighted the differences between them and suggested guidelines for their improvement. The feedback evaluation procedure proposed could facilitate the selection and improvement of haptic feedback strategies prior to clinical testing.

Examination of Tactor Configurations for the Design of Vibrotactile Feedback Systems for Use in Lower-Limb Prostheses

2018 ◽  
Author(s):  
Sam Shi ◽  
Matthew J. Leineweber ◽  
Jan Andrysek
Keyword(s):  
Lower Limb ◽  
Negative Relationship ◽  
Feedback System ◽  
Elevated Pressure ◽  
Intensity Level ◽  
Response Accuracy ◽  
Feedback Systems ◽  
Vibrotactile Feedback ◽  
Lower Limb Prosthesis ◽  
Lower Limb Prostheses

Vibrotactile feedback may be able to compensate for the loss of sensory input in lower-limb prosthesis users. Designing an effective vibrotactile feedback system would require that users could perceive and correctly respond to vibrotactile stimuli applied by the tactors. Our study explored three key tactor configuration variables (i.e. vibratory intensity, prosthetic pressure, spacing between adjacent tactors) through two experiments. The vibration propagation experiment investigated the effects of tactor configurations on vibratory amplitude at the prosthesis-limb interface. Results revealed a positive relationship between vibratory amplitude and intensity, and a negative relationship between vibratory amplitude and prosthetic pressure. The vibrotactile perception experiment investigated the effects of tactor configurations on user response accuracy, and found that greater spacing between tactors, and higher prosthetic pressure resulted in more accurate responses from the subjects. These findings inform the design of a vibrotactile feedback system for use in lower-limb prostheses: 1) the tactors may be best placed in areas of slightly elevated pressure at the prosthesis-limb interface; 2) a higher vibratory intensity level should improve performance for vibrotactile feedback systems; and 3) more spacing between adjacent tactors improves user response accuracy.

scholarly journals Usability Evaluation of a VibroTactile Feedback System in Stroke Subjects

2017 ◽  
Vol 4 ◽  
Author(s):  
Jeremia P. Held ◽  
Bart Klaassen ◽  
Bert-Jan F. van Beijnum ◽  
Andreas R. Luft ◽  
Peter H. Veltink
Keyword(s):  
Feedback System ◽  
Usability Evaluation ◽  
Vibrotactile Feedback

Transfemoral amputee’s limit of stability and sway analysis during weight shifting exercise with a vibrotactile feedback system

2019 ◽  
Vol 36 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Amit Kumar Vimal ◽  
Anoop Kant Godiyal ◽  
Upinderpal Singh ◽  
Shubhendu Bhasin ◽  
Deepak Joshi
Keyword(s):  
Feedback System ◽  
Vibrotactile Feedback ◽  
Weight Shifting

Design of a bilateral vibrotactile feedback system for lateralization

2011 ◽  
Author(s):  
Bernd Tessendorf ◽  
Daniel Roggen ◽  
Michael Spuhler ◽  
Thomas Stiefmeier ◽  
Gerhard Tröster ◽  
...  
Keyword(s):  
Feedback System ◽  
Vibrotactile Feedback

Exploring the Tactor Configurations of Vibrotactile Feedback Systems for Use in Lower-Limb Prostheses1

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
Sam Shi ◽  
Matthew J. Leineweber ◽  
Jan Andrysek
Keyword(s):  
Response Time ◽  
Lower Limb ◽  
Vibration Amplitude ◽  
Feedback System ◽  
User Perception ◽  
Feedback Systems ◽  
Vibrotactile Feedback ◽  
Spatial Error ◽  
Vibration Intensity ◽  
Time Accuracy

Vibrotactile feedback may be able to compensate for the loss of sensory input in lower-limb prosthesis users to improve the mobility function. Designing an effective vibrotactile feedback system requires that users are able to perceive and respond to vibrotactile stimuli correctly and in a timely manner. Our study explored four key tactor configuration variables (i.e., tactors’ prosthetic layer, vibration intensity, prosthetic pressure, and spacing between adjacent tactors) through two experiments. The vibration propagation experiment investigated the effects of tactor configurations on vibration amplitude at the prosthesis–limb interface. Results revealed a positive relationship between vibration amplitude and intensity and a weak relationship between vibration amplitude and prosthetic pressure. Highest vibration amplitudes were observed when the tactor was located on the inner socket layer. The second experiment involving a sample of ten able-bodied and three amputee subjects investigated the effects of tactor configurations on user perception measured by response time, accuracy identifying tactors’ stimulation patterns, and spatial error in locating the tactors. Results showed that placing the tactors on the inner socket layer, greater spacing between adjacent tactors, and higher vibration intensity resulted in better user perception. The above findings can be directly applied to the design of vibrotactile feedback systems to increase the user response accuracy and decrease the response time required for dynamic tasks such as gait. They can also help to inform future clinical trials informing the optimization of tactor configuration variables.

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