Paper Abstract and Keywords |
Presentation |
2016-03-05 14:45
BLE beacons' directional application improvement to guidance systems for the visually impaired Kazushi Sasaki, Takumi Nakazawa (Niigata Univ.), Daisuke Wakatsuki, Makoto Kobayashi (Tsukuba Univ. of Tech.), Kentaro Nishimori, Hideo Makino (Niigata Univ.) WIT2015-107 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
The present work examines directional applications of BLE beacons, and an indoor BLE beacon-based guidance system that holds the promise of truly accurate geographical positioning. At first, RSSI (Received Signal Strength Indication) is measured in smartphones, and the distance between the beacon and smartphone is estimated, based on its strength. Regarding signal strength, the degree of positioning error depends on the circumstances resulting from microwave reflection, or scattering. To eliminate this interference, we covered the BLE beacon with micro wave-absorbing and reflecting materials (carbon sponge and aluminum foil), to form a directional radio transmission pattern. In our experiments, we measured RSSI of the beacon from 8 distinct directions, both in a radio anechoic chamber and the laboratory. We determined that the Front-back ratio measured a maximum 18.6dB, when the beacon was covered by the aluminum foil. Moreover, we tested the speech-guidance function using two beacons. As a result, it was confirmed that beacons were easily distinguishable from one another, when they were positioned on corridor walls at 3m. intervals. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
BLE / RSSI / Directivity / Speech guidance / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 115, no. 491, WIT2015-107, pp. 107-112, March 2016. |
Paper # |
WIT2015-107 |
Date of Issue |
2016-02-26 (WIT) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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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WIT2015-107 |
Conference Information |
Committee |
WIT |
Conference Date |
2016-03-04 - 2016-03-05 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Tusukuba Univ. of Tech.(Tsukuba) |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Hearing / Visually impaired person support technology, etc. |
Paper Information |
Registration To |
WIT |
Conference Code |
2016-03-WIT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
BLE beacons' directional application improvement to guidance systems for the visually impaired |
Sub Title (in English) |
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Keyword(1) |
BLE |
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RSSI |
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Directivity |
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Speech guidance |
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1st Author's Name |
Kazushi Sasaki |
1st Author's Affiliation |
Niigata University (Niigata Univ.) |
2nd Author's Name |
Takumi Nakazawa |
2nd Author's Affiliation |
Niigata University (Niigata Univ.) |
3rd Author's Name |
Daisuke Wakatsuki |
3rd Author's Affiliation |
Tsukuba University of Technology (Tsukuba Univ. of Tech.) |
4th Author's Name |
Makoto Kobayashi |
4th Author's Affiliation |
Tsukuba University of Technology (Tsukuba Univ. of Tech.) |
5th Author's Name |
Kentaro Nishimori |
5th Author's Affiliation |
Niigata University (Niigata Univ.) |
6th Author's Name |
Hideo Makino |
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Niigata University (Niigata Univ.) |
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Speaker |
Author-1 |
Date Time |
2016-03-05 14:45:00 |
Presentation Time |
25 minutes |
Registration for |
WIT |
Paper # |
WIT2015-107 |
Volume (vol) |
vol.115 |
Number (no) |
no.491 |
Page |
pp.107-112 |
#Pages |
6 |
Date of Issue |
2016-02-26 (WIT) |
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