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Development of a phase difference of arrival technique for location of trapped miners.

Authors
Hopkins-WG III; Church-RH; Webb-WE
Source
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, OFR-46-84, :1-35
NIOSHTIC No.
10003398
Abstract
The development of systems for location of miners who have become entrapped following a mine disaster is one of the major research goals in the Bureau of Mines. Current technologies for locating trapped miners from the surface are either simple direction finders or time difference pulse systems that have accuracy limitations. Developing technologies using full-vector field measurements at several receiving points are currently being studied. The necessity of measuring field strength with great accuracy can be a drawback in these systems. However, a system that operates with continuous-wave radio signals, with phase differences that can be measured accurately even in weak signal conditions, would greatly improve the location accuracy. Comparison of this system with existing technology indicates a favorable accuracy-complexity ratio for the phase difference of arrival technique.
Keywords
Accident-prevention; Injury-prevention; Coal-miners; Coal-workers; Mine-disasters; Mine-rescue; Miners; Disaster-prevention; Personal-protective-equipment; Safety-equipment; Safety-measures; Safety-monitoring; Safety-research
Publication Date
19830101
Document Type
CP
Fiscal Year
1983
NTIS Accession No.
NTIS Price
Identifying No.
OFR-46-84
NIOSH Division
TURC
Source Name
Tuscaloosa, AL: U.S. Department of the Interior, Bureau of Mines, OFR-46-84
State
AL
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