Air gap measurement in cable of automotive electronics based on electromagnetic wave

Seung Jin Chang, Jin Bae Park

Research output: Contribution to journalArticlepeer-review


Time-frequency domain reflectometry (TFDR) based on electromagnetic theory is first introduced to measure air gap in cables. By using the relationship between propagation velocity and permittivity in electromagnetic theory, the new relationship between the air gap and the propagation velocity in cables can be obtained. The proposed method adopts a chirp signal as an incident signal and uses a normalized cross-correlation function for deriving propagation velocity. To reduce signal distortion caused by cable attenuation characteristics, a modified overcomplete wavelet transform is applied. The air gap volume, which can be measured by the proposed method, can be used as an indicator of poor contact between the cable and connector. The performance of the proposed method is verified through experiments.

Original languageEnglish
Article number20161275
Journalieice electronics express
Issue number5
Publication statusPublished - 2017

Bibliographical note

Funding Information:
This work was supported by Barun ICT Research Center at Yonsei University.

Publisher Copyright:
© IEICE 2017.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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