Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Development of a through-the-earth monitor system.

Authors
Anonymous
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0177098, 1980 Dec; :1-29
NIOSHTIC No.
10002172
Abstract
The objective of this program was to design and build a self-contained system for remote monitoring of the atmosphere in mines. The system developed uses the mine pager phone line as the primary communication channel and also has the capability of using 208 hz in the elf band for wireless transmission through the band. The depth for through-the-earth transmission is expected at about 80 to 90 meters in high conductivity soil and is limited by the noise level in the elf band-pass filters. The underground components of the through-the-earth monitor system are energized by mine power through a battery charger-storage battery power supply. In the event of mine power failure, the batter capacity is more than sufficient for 1 week's operation with interrogations every 4 hours.
Keywords
Mining-industry; Mining-equipment; Monitors; Monitoring-systems; Mine-gases; Atmosphere-analyzers; Underground-mining
Publication Date
19801201
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1981
NTIS Accession No.
PB81-237646
NTIS Price
A04
Identifying No.
OFR-99-81; Contract-H0177098
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0177098
State
MA; PA
Performing Organization
Arthur D. Little, Inc.
TOP