Cable fault locator research.
Cole-CA; Honey-SK; Petro-JP; Phillips-AC
NTIS: PB/83-205393, 1982; :1-128
This work consists of research in cable fault location and the construction of four field test units based on the research. Swept-frequency sounding of mine cables with radio frequency (RF) signals has been the technique most thoroughly investigated. The swept-frequency technique is supplemented with a form of moving target indication to provide a method for locating the position of a technician along a cable and relative to a suspected fault. Separate, more limited investigations involved high-voltage time domain reflectometry and acoustical probing of mine cables. Particular areas of research included microprocessor-based control of the swept-frequency system, a microprocessor-based fast fourier transform for spectral analysis, RF synthesizers, transmit-receive switches, RF receivers, cable dispersion-compensation techniques, low-voltage multielement display systems, and techniques for injecting or recovering RF energy through cable walls in support of clamp-on fault locators.
Mining-industry; Safety-research; Cables; Radio-waves; Sound; Signaling-systems; Signal-devices; Acoustic-signals; Acoustics; Spectrographic-analysis
CP; Final Contract Report
NTIS Accession No.
SRI International, Menlo Park, California