Successful detection of insulation degradation in cables by frequency domain reflectometry

研究成果: Conference contribution

抄録

We have succeeded in detecting the degradation of cable’s polymeric insulation well before its continual use becomes risky. Degradation of organic polymers is mainly caused by oxidation if the ambience around the cable contains oxygen. When organic polymers are oxidized, polar carbonyl groups are formed, by which the permittivity is increased. This in turn decreases the characteristic impedance of a polymer-insulated cable. If we inject electromagnetic waves in a very wide frequency range into the cable and measure the ratio of reflected power to injected power, the information on the effects of the characteristic impedance changes is included in the frequency spectra of the ratio. If we do inverse Fourier transform, we can convert the data to a time domain. Therefore, we can know the degraded portion by multiplying the velocity of electromagnetic waves in the cable.

本文言語English
ホスト出版物のタイトルMinerals, Metals and Materials Series
出版社Springer International Publishing
ページ1293-1301
ページ数9
ISBN(印刷版)9783030046385, 9783030046392, 9783319515403, 9783319651354, 9783319728520, 9783319950211
DOI
出版ステータスPublished - 2019 1 1
イベント18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019 - Boston, United States
継続期間: 2019 8 182019 8 22

出版物シリーズ

名前Minerals, Metals and Materials Series
ISSN(印刷版)2367-1181
ISSN(電子版)2367-1696

Conference

Conference18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems – Water Reactors 2019
CountryUnited States
CityBoston
Period19/8/1819/8/22

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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