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Paper Abstract and Keywords
Presentation 2015-01-27 09:00
Measurement of wireless communication characteristics in sewer pipes for sewer inspection systems using multiple wireless nodes -- 920MHz and 5GHz band --
Taiki Nagashima, Yudai Tanaka, Susumu Ishihara (Shizuoka Univ.) ASN2014-136
Abstract (in Japanese) (See Japanese page) 
(in English) Deterioration of sewer pipes is one of the very important problems in Japan. Sewer inspections have been done by mainly visual check or wired robots. However such inspection schemes involve high labor and/or monetary cost. Sewer inspection with boat-type video cameras or unwired robots takes a long time to check the result of the inspection. To realize low cost, safe and quick inspection of sewer pipes, we have proposed a sewer inspection system using drifting wireless sensor nodes. Water, Soil, and the narrow space in the pipe makes the long range wireless communication difficult. Therefore, we have to identify suitable frequency based on wireless communication characteristics in sewer pipes. If the frequency is high, the Fresnel zone the needed space for line of sight is small, but the path loss becomes worse. On the other hand, if the frequency is low, the Fresnel zone size is large, but the path loss becomes small. We conducted wireless communication using 920MHz, 2.4GHz and 5GHz band in an experimental underground pipe. The measurement results show that the wireless communication distance of 5GHz is longer than 920MHz, 2.4GHz and is 5m with 10mW.
Keyword (in Japanese) (See Japanese page) 
(in English) Sewer inspection / Sensor network / Wireless communication characteristics measurement / / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 418, ASN2014-136, pp. 139-144, Jan. 2015.
Paper # ASN2014-136 
Date of Issue 2015-01-19 (ASN) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 MICT ASN MoNA  
Conference Date 2015-01-26 - 2015-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Nanki Shirahama 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Ambient intelligence, ICT for Medical, Healthcare and Sports, etc 
Paper Information
Registration To ASN 
Conference Code 2015-01-MICT-ASN-MoNA 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Measurement of wireless communication characteristics in sewer pipes for sewer inspection systems using multiple wireless nodes 
Sub Title (in English) 920MHz and 5GHz band 
Keyword(1) Sewer inspection  
Keyword(2) Sensor network  
Keyword(3) Wireless communication characteristics measurement  
1st Author's Name Taiki Nagashima  
1st Author's Affiliation Shizuoka University (Shizuoka Univ.)
2nd Author's Name Yudai Tanaka  
2nd Author's Affiliation Shizuoka University (Shizuoka Univ.)
3rd Author's Name Susumu Ishihara  
3rd Author's Affiliation Shizuoka University (Shizuoka Univ.)
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Date Time 2015-01-27 09:00:00 
Presentation Time 25 
Registration for ASN 
Paper # IEICE-ASN2014-136 
Volume (vol) IEICE-114 
Number (no) no.418 
Page pp.139-144 
#Pages IEICE-6 
Date of Issue IEICE-ASN-2015-01-19 

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