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Cable fault locator research.

Cole CA; Honey SK; Petro JP; Phillips AC

NTIS: PB/83-205393, 1982; :1-128

10002901

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

19820101

CP; Final Contract Report

Contract

1982

PB83-205393

A08

OFR 93-83

PRC

NTIS: PB/83-205393

CA; PA

SRI International, Menlo Park, California