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Characterisation of an optical strain gauge for pantograph applications. / Rachid Khanniche

Swansea University Author: Rachid Khanniche

Abstract

An optical strain gauge is developed and characterised for an active pantograph for high-speed electrical trains applications. The pantograph is subjected to a continuous impact forces when it makes contact with the 25 kV overhead AC line. The carbon based pantograph head is susceptible to crack dam...

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Published: 2002
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42266
first_indexed 2018-08-02T18:54:17Z
last_indexed 2018-08-03T10:09:41Z
id cronfa42266
recordtype RisThesis
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spelling 2018-08-02T16:24:28.6201867 v2 42266 2018-08-02 Characterisation of an optical strain gauge for pantograph applications. bc8d5da748336c683c4add7a6392d218 NULL Rachid Khanniche Rachid Khanniche true true 2018-08-02 An optical strain gauge is developed and characterised for an active pantograph for high-speed electrical trains applications. The pantograph is subjected to a continuous impact forces when it makes contact with the 25 kV overhead AC line. The carbon based pantograph head is susceptible to crack damage due to these impacts An optical strain gauge based on the photo-elastic effect has been developed to monitor on line the contact force applied to the pantograph. The sensing system exploits the concept of chromatic modulation that can be produced by spectral changes induced by a controlled birefringence. Moreover the chromatic sensing technique is independent of the light intensity and provides total electrical isolation. The developed optical strain gauge was assessed to evaluate its performance and to find the range of operation. Static, hysterisis, repeatability and dynamic tests were carried out and the results compared to the theory when applicable. In the static test, it was found that the force against dominant wavelength was linear in the range of 0 to 80 N and became progressively non-linear for forces above 80 N, this is in a good agreement with the theory. These tests were carried out several times over a long period of time, and the results showed a good repeatability, although an acceptable degree of hysterisis was noted. Finally the resistance of the optical strain gauge was tested against dynamically varying loads and found that it exhibited a good resistance. These tests proved the suitability of this proposed optical strain gauge for the development of an active pantograph for high-speed electrical trains applications. E-Thesis Electrical engineering. 31 12 2002 2002-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:28.6201867 2018-08-02T16:24:28.6201867 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Rachid Khanniche NULL 1 0042266-02082018162440.pdf 10797974.pdf 2018-08-02T16:24:40.9770000 Output 4569915 application/pdf E-Thesis true 2018-08-02T16:24:40.9770000 false
title Characterisation of an optical strain gauge for pantograph applications.
spellingShingle Characterisation of an optical strain gauge for pantograph applications.
Rachid Khanniche
title_short Characterisation of an optical strain gauge for pantograph applications.
title_full Characterisation of an optical strain gauge for pantograph applications.
title_fullStr Characterisation of an optical strain gauge for pantograph applications.
title_full_unstemmed Characterisation of an optical strain gauge for pantograph applications.
title_sort Characterisation of an optical strain gauge for pantograph applications.
author_id_str_mv bc8d5da748336c683c4add7a6392d218
author_id_fullname_str_mv bc8d5da748336c683c4add7a6392d218_***_Rachid Khanniche
author Rachid Khanniche
author2 Rachid Khanniche
format E-Thesis
publishDate 2002
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description An optical strain gauge is developed and characterised for an active pantograph for high-speed electrical trains applications. The pantograph is subjected to a continuous impact forces when it makes contact with the 25 kV overhead AC line. The carbon based pantograph head is susceptible to crack damage due to these impacts An optical strain gauge based on the photo-elastic effect has been developed to monitor on line the contact force applied to the pantograph. The sensing system exploits the concept of chromatic modulation that can be produced by spectral changes induced by a controlled birefringence. Moreover the chromatic sensing technique is independent of the light intensity and provides total electrical isolation. The developed optical strain gauge was assessed to evaluate its performance and to find the range of operation. Static, hysterisis, repeatability and dynamic tests were carried out and the results compared to the theory when applicable. In the static test, it was found that the force against dominant wavelength was linear in the range of 0 to 80 N and became progressively non-linear for forces above 80 N, this is in a good agreement with the theory. These tests were carried out several times over a long period of time, and the results showed a good repeatability, although an acceptable degree of hysterisis was noted. Finally the resistance of the optical strain gauge was tested against dynamically varying loads and found that it exhibited a good resistance. These tests proved the suitability of this proposed optical strain gauge for the development of an active pantograph for high-speed electrical trains applications.
published_date 2002-12-31T07:16:23Z
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score 11.108223

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