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Paper Abstract and Keywords
Presentation 2012-02-17 11:25
An experimental study on an optical measurement system for damages on contact surfaces
Keisuke Takahashi, Makoto Hasegawa (Chitose Inst. of Science and Technology) R2011-44 EMD2011-118 Link to ES Tech. Rep. Archives: EMD2011-118
Abstract (in Japanese) (See Japanese page) 
(in English) Contact surfaces of mechanical relays and switches are often damaged by arc discharges and/or mechanical wear during switching operations. Conventionally, erosion and transfer characteristics of various contact materials under different load conditions have been mainly studied based on observation and evaluation of contact surfaces after switching operation tests. On the other hand, a further detailed study will become possible if we can observe and numerically evaluate a changing process of surface damages (especially, growth of a crater and/or a pip) on contact surfaces during switching operations. For that purpose, an evaluation system of contact surface damages by way of an optical cross-section method is being constructed, and it has become possible to observe changes in contact surface profiles during switching operations. In this paper, accuracies of numerical evaluation of the system is evaluated through comparisons of obtained data with the corresponding data measured by a laser microscope as well as another measurement system employing a laser displacement sensor. Furthermore, in order to improve performances of the system, a line laser light source has been replaced with a new one, and its influences on measurement capabilities have been checked.
Keyword (in Japanese) (See Japanese page) 
(in English) optical cross-section method / electrical contacts / arc discharge / crater shape / material transfer / erosion / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 439, EMD2011-118, pp. 13-18, Feb. 2012.
Paper # EMD2011-118 
Date of Issue 2012-02-10 (R, EMD) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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)
Download PDF R2011-44 EMD2011-118 Link to ES Tech. Rep. Archives: EMD2011-118

Conference Information
Committee EMD R  
Conference Date 2012-02-17 - 2012-02-17 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To EMD 
Conference Code 2012-02-EMD-R 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An experimental study on an optical measurement system for damages on contact surfaces 
Sub Title (in English)  
Keyword(1) optical cross-section method  
Keyword(2) electrical contacts  
Keyword(3) arc discharge  
Keyword(4) crater shape  
Keyword(5) material transfer  
Keyword(6) erosion  
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Keyword(8)  
1st Author's Name Keisuke Takahashi  
1st Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Science and Technology)
2nd Author's Name Makoto Hasegawa  
2nd Author's Affiliation Chitose Institute of Science and Technology (Chitose Inst. of Science and Technology)
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Date Time 2012-02-17 11:25:00 
Presentation Time 25 minutes 
Registration for EMD 
Paper # R2011-44, EMD2011-118 
Volume (vol) vol.111 
Number (no) no.438(R), no.439(EMD) 
Page pp.13-18 
#Pages
Date of Issue 2012-02-10 (R, EMD) 


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