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Paper Abstract and Keywords
Presentation 2017-05-22 13:55
Non-contact measurement of body-surface displacement by breathing and heart beat using airborne acoustic images
Taiki Hayashi, Shinnosuke Hirata, Hiroyuki Hachiya (Tokyo Inst. of Tech.) US2017-15
Abstract (in Japanese) (See Japanese page) 
(in English) Today, vital signs measurement systems, in which sensors are had contact with or closed to body surface, are widely prevalent.
However, These systems cannot be used in the situation where continuous monitoring is required or a subject cannot carry sensors,
In this research, a method to measure the body-surface displacement by breathing and heart beats for the vital signs monitoring are studied.
The body-surface displacement is measured by ultrasonic transit time which is reflected from the body surface in the method.
In this report, measurement of 2-dimensional displacement of chest by pulse compression using M-sequence and phase tracking in airborne acoustic images is described.
First, the M-sequence modulated signal is cyclically transmitted by the loudspeaker and received signals of two microphones are correlated with the transmitted signal.
Then, airborne acoustic images are formed by the obtained cross-correlation functions
The reflection points on the body surface are determined from high brightness areas in the images.
After that, 2-dimensional displacement beyond the resolution is estimated by phase tracking in the reflection points
Finally, the subject's breathing and heart beats without close in a spine and standing position are monitored by the proposed method.
Keyword (in Japanese) (See Japanese page) 
(in English) airborne ultrasound / pulse compression using M-sequence / vital signs measurement / phase tracking / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 41, US2017-15, pp. 7-12, May 2017.
Paper # US2017-15 
Date of Issue 2017-05-15 (US) 
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)
Download PDF US2017-15

Conference Information
Committee US  
Conference Date 2017-05-22 - 2017-05-22 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To US 
Conference Code 2017-05-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Non-contact measurement of body-surface displacement by breathing and heart beat using airborne acoustic images 
Sub Title (in English)  
Keyword(1) airborne ultrasound  
Keyword(2) pulse compression using M-sequence  
Keyword(3) vital signs measurement  
Keyword(4) phase tracking  
1st Author's Name Taiki Hayashi  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
2nd Author's Name Shinnosuke Hirata  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
3rd Author's Name Hiroyuki Hachiya  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2017-05-22 13:55:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2017-15 
Volume (vol) vol.117 
Number (no) no.41 
Page pp.7-12 
Date of Issue 2017-05-15 (US) 

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