Location attempt of a coaxial cable with multiple abnormalities by frequency domain reflectometry

Research output: Contribution to journalArticle

Abstract

We have demonstrated that frequency domain reflectometry (FDR) can locate the position of degradation or abnormality in a cable with the assistance of inverse fast-Fourier transform (IFFT). Although it is easily understandable that this FDR-IFFT method can be applied for a location attempt of a cable with more than one abnormality, we have not demonstrated this experimentally. Therefore, we heated two different positions on a coaxial cable of 31.5 m insulated with low-density polyethylene using two heating chambers. As a result, it is clearly indicated that the two positions can be located if we heated there only by 10°C. Furthermore, this method can precisely estimate the length of a heated portion in a coaxial cable when we set the highest measurement frequency higher than 600 MHz.

Original languageEnglish
Pages (from-to)367-372
Number of pages6
JournalIEEJ Transactions on Fundamentals and Materials
Volume139
Issue number9
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

Coaxial cables
Fast Fourier transforms
Cables
Low density polyethylenes
Heating
Degradation

Keywords

  • Aging monitoring
  • Fourier transform
  • Location
  • Polymer-insulated cable
  • Thermal degradation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

@article{29506f2774804ef0a686311cc7408214,
title = "Location attempt of a coaxial cable with multiple abnormalities by frequency domain reflectometry",
abstract = "We have demonstrated that frequency domain reflectometry (FDR) can locate the position of degradation or abnormality in a cable with the assistance of inverse fast-Fourier transform (IFFT). Although it is easily understandable that this FDR-IFFT method can be applied for a location attempt of a cable with more than one abnormality, we have not demonstrated this experimentally. Therefore, we heated two different positions on a coaxial cable of 31.5 m insulated with low-density polyethylene using two heating chambers. As a result, it is clearly indicated that the two positions can be located if we heated there only by 10°C. Furthermore, this method can precisely estimate the length of a heated portion in a coaxial cable when we set the highest measurement frequency higher than 600 MHz.",
keywords = "Aging monitoring, Fourier transform, Location, Polymer-insulated cable, Thermal degradation",
author = "Naoshi Hirai and Yoshimichi Ohki",
year = "2019",
month = "1",
day = "1",
doi = "10.1541/ieejfms.139.367",
language = "English",
volume = "139",
pages = "367--372",
journal = "IEEJ Transactions on Fundamentals and Materials",
issn = "0385-4205",
publisher = "The Institute of Electrical Engineers of Japan",
number = "9",

}

TY - JOUR

T1 - Location attempt of a coaxial cable with multiple abnormalities by frequency domain reflectometry

AU - Hirai, Naoshi

AU - Ohki, Yoshimichi

PY - 2019/1/1

Y1 - 2019/1/1

N2 - We have demonstrated that frequency domain reflectometry (FDR) can locate the position of degradation or abnormality in a cable with the assistance of inverse fast-Fourier transform (IFFT). Although it is easily understandable that this FDR-IFFT method can be applied for a location attempt of a cable with more than one abnormality, we have not demonstrated this experimentally. Therefore, we heated two different positions on a coaxial cable of 31.5 m insulated with low-density polyethylene using two heating chambers. As a result, it is clearly indicated that the two positions can be located if we heated there only by 10°C. Furthermore, this method can precisely estimate the length of a heated portion in a coaxial cable when we set the highest measurement frequency higher than 600 MHz.

AB - We have demonstrated that frequency domain reflectometry (FDR) can locate the position of degradation or abnormality in a cable with the assistance of inverse fast-Fourier transform (IFFT). Although it is easily understandable that this FDR-IFFT method can be applied for a location attempt of a cable with more than one abnormality, we have not demonstrated this experimentally. Therefore, we heated two different positions on a coaxial cable of 31.5 m insulated with low-density polyethylene using two heating chambers. As a result, it is clearly indicated that the two positions can be located if we heated there only by 10°C. Furthermore, this method can precisely estimate the length of a heated portion in a coaxial cable when we set the highest measurement frequency higher than 600 MHz.

KW - Aging monitoring

KW - Fourier transform

KW - Location

KW - Polymer-insulated cable

KW - Thermal degradation

UR - http://www.scopus.com/inward/record.url?scp=85071843457&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071843457&partnerID=8YFLogxK

U2 - 10.1541/ieejfms.139.367

DO - 10.1541/ieejfms.139.367

M3 - Article

VL - 139

SP - 367

EP - 372

JO - IEEJ Transactions on Fundamentals and Materials

JF - IEEJ Transactions on Fundamentals and Materials

SN - 0385-4205

IS - 9

ER -