development of smart cane for blind people
TRANSCRIPT
Development of
Smart Cane
Submitted by :-PRADEEP THAKUR152214
Table of content
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Commercially Available ETAs
smart cane Device Evolution and Next Steps Project Initiation & Specification
R & D and Development of Field Deployable Product
Product Testing & Field Trials
Restricted range and inability to detect knee-above obstacles
Limitations of the White Cane
causes unexpected collisions and upper-body injuries.
Study of Commercially Available ETAs
• Procurement and study of commercially available ETAs.
• User testing with 5 users each, one week usage.
• Evaluation of key technical parameters.
Teletect The Mini guide mobility aid
Lessons Learnt from Study of ETAs
• User prefer ETAs where only one hand is used. • ETAs were not flexible in gripping styles or force
users to adopt to new gripping styles may not work.• ETAs which provide feedback as auditory output via
earphone conceal some valuable auditory clues from the environment which is necessary and important for mobility, path planning and safety.
• User prefer devices which are small in size and weight but do not prefer rigorous scanning to detect obstacles.
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Smart Cane
Smart Cane is an obstacledetection and warning system
Can be easily mounted anddetached from white cane.
Detects obstacles with the use of ultrasonic waves.
Presence of obstacles is conveyed by easily perceptible and intuitive vibratory patterns. 6
Various Navigation Scenarios
Path Finding Gate Detection
Indoor Navigation Raised obstacle detected 3m away
Smart Cane Characteristics
Rechargeable Li –ion battery.
Indoor and outdoor modes of navigation.
User adjustable sensor angle
Accommodating wide varying grips
Affordable
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Device usage with widely varying grips.
Flexibility
Cane-mountable through anattachment mechanism.
Device Evolution and Next Steps
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Three Milestones
1. Project Initiation & Specification
2. R & D and Development of Field Deployable Product
3. Product Testing & Field Trials
Milestone 1: Key Activities
Team Formation & Logistics Setup
Product Specifications
Requirements ManufacturabilityUser Workshop for Validation
Study of Other ETAs User Feedback Preliminary R & D
Milestone 1: Key Activities
Team Formation & Logistics Setup
Study of Other ETAs User Feedback Preliminary R & D
Procurement of Commercially Available
ETAs in market
Review of Published Studies on ETAs & Mobility
Study of Commercially Available White Canes
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Milestone 1: Key Activities
Team Formation & Logistics Setup
Study of Other ETAs
User Feedback Preliminary R & D
Review of Disability, Mobility and Human Factors Literature
Questionnaire & Obstacle Course Design
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Milestone 1: Key Activities
Team Formation & Logistics Setup
Study of Other ETAs User Feedback Preliminary R&D
Electronics Design
Mechanical Design
Prototyping
Self Learning & Training Manuals
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2.Product R&D (Electronics)
• Sourcing & testing smaller and water proof ultrasonic sensors.
• Exploring trans-receiver based sensors.• Miniaturized combined electronics circuit.• Multilayer PCB design
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Electronics Final version
Product R&D (Mechanical Design)
Version 0.4
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Version 0.5
Version 0.6 Version 0.7
Product R&D (Mechanical Design)
Version 0.8 used for user trials
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Product R&D (Mechanical Design)
Design Version 0.9
• Non protruding angle adjustment mechanism• Reduced size, thinner grip & better weight balancing• Braille markings according to standards• Single combined ultrasonic and control circuit
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Version 1.0Field trial prototype
Version 1.1 Elongated prototype
Version 1.2Combined circuit prototype
Version 1.3
Version 2.0 Final design
Sleek design 31
Design Approach to Grip Design
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Identify pain areas in all types of grips
Identify common pain areas in all grips
Explore other palmareas to reduce stress
Design Approach to Grip Design
Trials with Clay Models
Design Approach to Grip Design
3D Digitizing Clay Models to build CAD models
New Design of Smart Cane
Old and New Design
Cane attachment and Detachment Mechanism
New Design of Smart Cane
New Design of Smart Cane
Angle Adjustment Mechanism
Manufacturing process
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3.Testing setup
Testing Area for Sensor Field of View
User Study Sites
Chennai
Ahmedabad
Shimla
Dehradun
Delhi
Study Completed
84
feedback trials of Smart Cane
Gender distribution of user group per site
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Age distribution of user group per site
Source:- http://assistech.iitd.ernet.in/smartcane.php
Key Findings from Feedback Trials
There is an acceptance for overall concept of the device.Some features such as intuitive tactile patterns for distance of obstacles and battery level indicators were appreciated by all.During the study, users suggested various modifications such as reduced weight, reduced size of the device.
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Vibratory Tests
Smart cane 1.145 m/s2
Mini guide 4.27 m/s2
Samsung Cell Phone 2.78 m/s2
Nokia Cell Phone 0.8454 m/s2
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Vibratory pattern analysis
Salient Features of Current Version• Reduced size
• Reduced weight
• Improved weight balancing
• Ergonomic grip
• Braille markings according to standards
• Easily accessible controls• combined ultrasonic and control circuit with
reduced size
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Packaging & Training Manuals
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Obstacle arena
Colli
sion
rate
U1 U2
U3 U4 U5
U6
U7
U8
U9
U10
U
11
U12
U
13
U14
U
15
U16
U
17
U18
U
19
U20
U
21
U22
U
23
U24
U
25
U26
U
27
U28
U
29
U30
Collision rate with chest above obstacles using white cane and Smartcane
100.0
80.0
60.0
collision rate with chest aboveobstacles using white cane
40.0
20.0
0.0
Users
Collision Study using Obstacle Course
collision rate with chest above obstacles using smartcane
Source: http://assistech.iitd.ernet.in/smartcane.php
Colli
sion
rate
Overall Collison rate with obstacles using white cane and Smartcane
100.0
Overall collision rate with obstacles using white cane
Overall collision rate with obstacles using smartcane
80.0
60.0
40.0
20.0
0.0U1 U2 U3 U4 U5 U6 U7 U8 U9 U10 U11 U12 U13 U14 U15 U16 U17 U18 U19 U20 U21 U22 U23 U24 U25 U26 U27 U28 U29 U30
Users
Collision Study using Obstacle Course
Source: http://assistech.iitd.ernet.in/smartcane.php
References
1. http://smartcane.saksham.org/
2. http://www.gdp-research.com.au/minig_1.htm3. http://assistech.iitd.ernet.in/smartcane.php4. https://www.seeingwithsound.com/binocular.htm5. http://www.aph.org/news/june-2008/6. http://www.phoenixmedicalsystems.com/?option=c
om_jumi&fileid=23&Itemid=45
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Thank You…