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Dhruv Jain, Prabhav Agrawal , Kartik Maheshwari , Aman Mittal ,

‘ROSHNI’ FOR THE VISUALLY IMPAIRED: Design and user study of an affordable indoor navigation system. Dhruv Jain, Prabhav Agrawal , Kartik Maheshwari , Aman Mittal ,

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Dhruv Jain, Prabhav Agrawal , Kartik Maheshwari , Aman Mittal ,

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  1. ‘ROSHNI’ FOR THE VISUALLY IMPAIRED: Design and user study of an affordable indoor navigation system Dhruv Jain, PrabhavAgrawal, KartikMaheshwari, AmanMittal, Akshay Gupta, AmauryOllagnier, ArpitGoyal, Rohan Paul, AshishRanjan, Anuraag Gupta, ManasPaldhe, Prof. M. Balakrishnan, Prof. P.V.M. RaoIndian Institute of Technology, New Delhi, IndiaandSupriya Das, SaurabhSanyal, YogeshTaneja, Mr. DipendraManochaSaksham Trust, New Delhi, India

  2. Overview • Introduction to the problem • Measures adopted by visually challenged for indoor navigation • Importance of an indoor navigation system • Aim of the project • Features • System description • User interface • Installations and user study • System installations in a university building • Experimentation • Conclusion • Comparison with existing systems • Future plan

  3. Measures adopted by the visually challenged for navigating in unknown indoor environments

  4. Importance of an Indoor Navigation System • Independent Mobility: Primary Challenge for the visually impaired • Difficulty in navigation especially in GPS denied environment • Low cost solution required • Current systems have limitations: • Unaffordable cost • Non availability of sales, marketing or servicing in developing countries • Highly inaccurate and thus unsuitable for public use • Cumbersome to carry or difficult to operate. “ Presently, there is no system available in developing countries that allows a blind person to navigate freely in an indoor environment ”

  5. Aims of this Project • To design and implement an affordable user-enabled system for convenient indoor navigation. • To assist the user in reaching the desired destination of the building through active acoustic messages. • The system operation must be controlled entirely by the user with no dependence on sighted assistance, require minimal modifications and should be easily retrofitted to existing building infrastructure. • To install the system on multiple floors of a university building and conduct experiments with potential users under normal conditions and collect user feedback.

  6. System Description • Use of infrared sensor and inertial unit to identify the position. • Providing auditory output emanating from the mobile phone application storing the map of the building. • Buzzer to beep on reaching the destination. WALL MOUNTED WAIST WORN Voice output to the user

  7. User Interface Present user module Users navigating with Roshni Mobile application

  8. Track used for user trials. Red dots represent position of infrared units, yellow arrows shows the traversed path (left) University building where the system was installed (right). System Installation on an institute building

  9. Experimentation • Setup • Infrared unit mounted at every 5-7 m on the walls and doors of all possible destinations on the path • User module was attached to the waist and mobile phone was given to be kept in hand/pocket and tested with 6 users • Standardized protocol • Training phase • First day: introduced to the modules • Second day: operation of the mobile application, reinforcement sessions on a simpler track • Trial phase • Baseline • questionnaire • Field testing • Post-trail • questionnaire User navigating without any external sighted assistance. User module (red arrow) and wall-mounted module (black-arrow)

  10. Experimentation • Results • Questionnaire based survey • Users mentioned that most buildings rarely have accessible signage. • Random exploration: find signs, ask for help, hit and trial approach. • Emphasized their high degree of anxiety, hesitation to ask for help. • Reported frequently getting lost and injured. • System effectiveness • All users were able to learn the • operation and were able to use • the system as an effective • navigational guide. • Significant reduction in (i) Time • of travel (ii) Deviation from • direct path for users unfamiliar • with the building. • Ineffective for frequent visitors. Reporting user feedback

  11. Experimentation • Results • Post-experiment User Feedback • All 6 users believed it is useful for a day to day living and will be willing to use the device as a future product. • Mentioned that they were able to reach their destination comfortably. • Suggested significant improvement in design: • Multi-lingual support Reduction in size • Clearer accent Provision to mount on walking cane Histograms illustrating the effectiveness of Indoor Navigation System (INS) in reducing Time of Travel (left) , Deviation from Direct Path (right) (Without System (blue) and With System (Red))

  12. Comparison with Existing Systems

  13. Comparison with Existing Systems

  14. Plan • 3 phase approach • Phase 1: Concept demonstration • Lab prototype demonstration showing the basic feasibility of the device. • Phase 2: Pilot stage development • Full deployment of the system in an institute building for regular trials. • Phase3: Industrial Production • Pairing up with a company for large scale production of devices. Currently in Phase2: Pilot stage development. Looking for funding partners for further research towards product realization

  15. IMPLICATIONS • Affordable system. • Can be integrated into the existing infrastructure. • Facilitates independent indoor navigation in an unfamiliar environment. • Small, easy and convenient for individuals with low vision.

  16. Thank You Please visit our stall

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