scholarly journals Haptic Feedback to Assist Blind People in Indoor Environment Using Vibration Patterns

Sensors ◽  
2022 ◽  
Vol 22 (1) ◽  
pp. 361
Author(s):  
Shah Khusro ◽  
Babar Shah ◽  
Inayat Khan ◽  
Sumayya Rahman
Keyword(s):  
Haptic Feedback ◽  
Spatial Information ◽  
Feedback System ◽  
Blind People ◽  
Noisy Environment ◽  
Alternative Approach ◽  
Mental Mapping ◽  
Speech Feedback ◽  
Blind User ◽  
Significant Factors

Feedback is one of the significant factors for the mental mapping of an environment. It is the communication of spatial information to blind people to perceive the surroundings. The assistive smartphone technologies deliver feedback for different activities using several feedback mediums, including voice, sonification and vibration. Researchers 0have proposed various solutions for conveying feedback messages to blind people using these mediums. Voice and sonification feedback are effective solutions to convey information. However, these solutions are not applicable in a noisy environment and may occupy the most important auditory sense. The privacy of a blind user can also be compromised with speech feedback. The vibration feedback could effectively be used as an alternative approach to these mediums. This paper proposes a real-time feedback system specifically designed for blind people to convey information to them based on vibration patterns. The proposed solution has been evaluated through an empirical study by collecting data from 24 blind people through a mixed-mode survey using a questionnaire. Results show the average recognition accuracy for 10 different vibration patterns are 90%, 82%, 75%, 87%, 65%, and 70%.

A Haptic Feedback System for Lower-Limb Prostheses

2008 ◽  
Vol 16 (3) ◽  
pp. 270-277 ◽  
Author(s):  
R.E. Fan ◽  
M.O. Culjat ◽  
Chih-Hung King ◽  
M.L. Franco ◽  
R. Boryk ◽  
...  
Keyword(s):  
Lower Limb ◽  
Haptic Feedback ◽  
Feedback System ◽  
Lower Limb Prostheses

scholarly journals Sole Mate: Safe Path-Finding by Obstacle Detection and Distance Estimation for the Blind

2019 ◽  
Vol 8 (6S4) ◽  
pp. 50-54
Keyword(s):  
Haptic Feedback ◽  
Distance Estimation ◽  
Feedback System ◽  
Obstacle Detection ◽  
Video Footage ◽  
System A ◽  
The World ◽  
Distance Sensor ◽  
Visually Challenged ◽  
Additional Device

The world has increased its demand for assistive technology (AT). There are a lot of researches and developments going on with respect to AT. Among the AT devices which are being developed, the need for a reliable and less expensive device which serves as an assistance for a visually challenged person is in serious demand all around the world. We, therefore, intend to provide a solution for this by constructing a device that has the capability to detect the obstacles within a given range for a visually challenged person and alerting the person about the obstacles. This involves various components like a camera for image detection, an ultrasonic distance sensor for distance estimation and a vibration motor which works on the principle of Haptic feedback and rotates with varied intensities depending on how far the obstacle is from the user. This paper presents a model which is a part of the footwear of the user and hence, no additional device is required to hold onto for assistance. The model involves the use of a microcontroller, a camera, to dynamically perceive the obstacles and a haptic feedback system to alert the person about the same. The camera dynamically acquires the real time video footage which is further processed by the microcontroller to detect the obstacles. Simultaneously, one more algorithm is being executed to estimate the distance with the help of an ultrasonic distance sensor. Depending on the distance, the frequency of the vibration motor, which acts as the output for notifying the user about the obstacle, is varied (haptic feedback). With this system, a visually challenged person will be able to avoid the obstacles successfully without the use of any additional device.

Spatial Representation in Blind Children. 3: Effects of Individual Differences

1981 ◽  
Vol 75 (2) ◽  
pp. 46-49 ◽  
Author(s):  
Janet F. Fletcher
Keyword(s):  
Visual Acuity ◽  
Spatial Representation ◽  
Spatial Information ◽  
Blind People ◽  
Light Perception ◽  
Early Vision ◽  
Retrolental Fibroplasia ◽  
Independent Variables ◽  
Blind Children ◽  
Better Than

Theories of spatial representation in blind people have focused on the type of representation of which they, as a group, are capable. This approach overlooks an important issue, namely, the differences among individual blind people and the effects that these differences have on the way spatial information is represented. Data from another article by the author on the same study of spatial representation in blind children were subjected to two step-wise regression analyses to determine the relationships between several subject-related variables and responses to “map” (cognitive map) and “route” (sequential memory) questions about the position of furniture in a recently explored room. The independent variables accounted for 70 percent of the variance on map questions but only 46 percent of the variance on route questions. On map questions, general intellectual ability correlated positively with performance (p < .01), children with visual acuity better than light perception in the first 3 years of life performed better than those with less early vision (p < .05), and children who became blind from retrolental fibroplasia performed more poorly than those whose blindness was due to other causes (p < .05). Fewer independent variables contributed to the variance in performance on route questions. Again children with visual acuity better than light perception in their first 3 years performed better than those with less early vision.

scholarly journals Evaluation of a Haptic Feedback System for Flight Envelope Protection

2019 ◽  
Author(s):  
Dirk Van Baelen ◽  
Joost Ellerbroek ◽  
Marinus M. van Paassen ◽  
Max Mulder
Keyword(s):  
Haptic Feedback ◽  
Feedback System ◽  
Flight Envelope ◽  
Envelope Protection

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.

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