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Paper Abstract and Keywords
Presentation 2022-03-09 13:25
Development of Guidance System for the Blind Using a Pair of Pickup Coil
Kouhei Komine, Kazuhisa Ito (Shibaura Inst. of Tech.) WIT2021-54
Abstract (in Japanese) (See Japanese page) 
(in English) The braille blocks support the blinds with cane to walk public road safe. The block has uneven surface to tell them the direction to go or dangerous spot. However, on the other hand, these blocks cause fall for aged people or are obstacles for people who use wheelchairs. To improve these situations from the perspective of universal design, more sophisticated guidance system is required.
In this study, we propose a new guidance system using a pickup coil. This system applied electromagnetic induction between a pair of transmit and receive coils to convey the surrounding situation to the blinds as voice information in a non-contact manner, and then no uneven surface is required. More concretely, a receiver pickup coil attached at the tip of cane picks up information from a transmission coil installed in pavement block, and received information is sent to bone conduction headphones. The problem to be solved are: 1) how to distinguish multiple information from different transmission coils, and 2) how to attenuate volume fluctuation for the distance change from the pickup coil to the transmission coil caused by swinging of cane. To solve these problems, we apply an amplitude modulation for automatic voice selection using synchronous detection and a volume normalization with simple filter. As a result of the experiments, it was confirmed that the pickup coil automatically selected and transmitted information with appropriate voice both whether recieve coil at the cane was stationary or swinging, and this showed effectiveness of signal processing of the proposed guidance system.
Keyword (in Japanese) (See Japanese page) 
(in English) Pickup coil / electromagnetic induction / amplitude modulation / FFT / Digital filter / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 418, WIT2021-54, pp. 65-70, March 2022.
Paper # WIT2021-54 
Date of Issue 2022-03-01 (WIT) 
ISSN Online edition: ISSN 2432-6380
Copyright
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee WIT IPSJ-AAC  
Conference Date 2022-03-08 - 2022-03-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To WIT 
Conference Code 2022-03-WIT-AAC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of Guidance System for the Blind Using a Pair of Pickup Coil 
Sub Title (in English)  
Keyword(1) Pickup coil  
Keyword(2) electromagnetic induction  
Keyword(3) amplitude modulation  
Keyword(4) FFT  
Keyword(5) Digital filter  
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1st Author's Name Kouhei Komine  
1st Author's Affiliation Shibaura Institute of Technology (Shibaura Inst. of Tech.)
2nd Author's Name Kazuhisa Ito  
2nd Author's Affiliation Shibaura Institute of Technology (Shibaura Inst. of Tech.)
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Speaker Author-1 
Date Time 2022-03-09 13:25:00 
Presentation Time 25 minutes 
Registration for WIT 
Paper # WIT2021-54 
Volume (vol) vol.121 
Number (no) no.418 
Page pp.65-70 
#Pages
Date of Issue 2022-03-01 (WIT) 


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