Proceedings ArticleDOI
Application of time-frequency domain reflectometry based on multi-band signal for detection and localization of fault on cable
Moon Kang Jung,Yong-June Shin,Jin Bae Park +2 more
- pp 396-401
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TLDR
In this article, a multi-band signal based on FDM was proposed to solve the trade-off between spatial resolution and attenuation of the reference signal. But, the proposed signal is not suitable for high-frequency domain reflectometry (TFDR) this article.Abstract:
This paper presents time-frequency domain reflectometry (TFDR)-fault detection method based on frequency division multiplexed (FDM) signal. The TFDR-method sends a reference signal into a cable and measures the reflected signals to detect a fault on cable. Therefore, the performance of TFDR-based detection method is determined by characteristic of the reference signal. Especially, choosing frequency band of the reference signal is main concern of TFDR-method since it suffers from trade-off relation between spatial resolution and attenuation of the reference signal. If one increases frequency band of reference signal to improve spatial resolution, the signal suffers from attenuation in cable. That is trade-off relation of signal. Thus, to optimize this trade-off issue, we propose multi-band signal based on FDM. This approach is able to synthesize two signals which have different frequency band; one is designed for the spatial resolution, and the other is used for attenuation. Hence, in TFDR-method, the proposed reference signal can solve the optimization problem and gives more accurate fault location without the distance limitation caused by attenuation and spatial resolution. Simulation results show that the proposed method localizes the accurate fault location.read more
Citations
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Journal ArticleDOI
Machine learning-based system for fault detection on anchor rods of cable-stayed power transmission towers
M. S. Coutinho,L. R. G. S. Lourenco Novo,M. T. de Melo,L.H.A. de Medeiros,D. C. P. Barbosa,M. M. Alves,V. L. Tarrago,R. G. M. dos Santos,H.B.T.D. Lott Neto,P. H. R. P. Gama +9 more
TL;DR: A field application system for detecting structural faults on anchor rods of cable-stayed towers of power transmission lines, based on a nondestructive technique using frequency domain reflectometry analysis, which was developed for a novel predictive maintenance process for ground-anchored metallic rods.
Journal ArticleDOI
Application of Pulse Compression Technique in Fault Detection and Localization of Leaky Coaxial Cable
TL;DR: An efficient technique in fault detection and localization of leaky coaxial cable (LCX) is presented, which injects a reference signal into an LCX and handles the reflected signal to locate the fault.
Journal ArticleDOI
Validation of S-parameter power cable joint model on two cable defect sections
TL;DR: This research studies the fault identification for two degraded sections in a cable by analyzing the reflected signal from the TDR technique and shows that the signal reflection characteristics from MATLAB/Simulink simulations are similar to the experimental results.
Journal ArticleDOI
TDR Discontinuity Study Using Gaussian Modulated Ultra Short Pulse in UWB Microwave/mm-Wave Circuits
TL;DR: In this paper, a new technique based on Gaussian modulated ultra short pulse and a useful new algorithm was proposed to improve the discontinuities separation, position extraction, and nature of multiple close discontinuity in ultra wideband (UWB) Microwave/mm-wave circuits.
Journal ArticleDOI
Power cable with two joints experimental analysis for defect assessments
Tze Mei Kuan,Azrul Mohd Ariffin +1 more
TL;DR: Experimental analysis on cable with two joints with the application of TDR technique has proven that the TDR reflection characteristics are consistent and accurate which can be used to sectionalize the degraded cable section.
References
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TL;DR: A new high-resolution reflectometry technique that operates simultaneously in both the time and frequency domains, which rests upon time-frequency signal analysis and utilizes a chirp signal multiplied by a Gaussian time envelope.
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Application of phase detection frequency domain reflectometry for locating faults in an F-18 flight control harness
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Journal ArticleDOI
Detection and Location of Multiple Wiring Faults via Time–Frequency-Domain Reflectometry
Eun-Seok Song,Yong-June Shin,Philip Stone,Jingjiang Wang,Tok-Son Choe,Jong-Gwan Yook,Jin Bae Park +6 more
TL;DR: In this article, a high-resolution time-frequency-domain reflectometry technique is proposed for detecting and estimating faults on a wire, which adopts the timefrequency cross-correlation characteristics of the observed signal in both the time and frequency domains simultaneously.