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Title: In situ measurement system

Abstract

A multipurpose in situ underground measurement system comprising a plurality of long electrical resistance elements in the form of rigid reinforcing bars, each having an open loop hairpin configuration of shorter length than the other resistance elements. The resistance elements are arranged in pairs in a unitized structure, and grouted in place in the underground volume. Measurement means are provided for obtaining for each pair the electrical resistance of each element and the difference in electrical resistance of the paired elements, which difference values may be used in analytical methods involving resistance as a function of temperature. A scanner means sequentially connects the resistance-measuring apparatus to each individual pair of elements. A source of heating current is also selectively connectable for heating the elements to an initial predetermined temperature prior to electrical resistance measurements when used as an anemometer.

Inventors:
Issue Date:
OSTI Identifier:
5244981
Assignee:
Dept. of Energy ERA-07-046457; EDB-82-123488
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 58 GEOSCIENCES; ELECTRIC CONDUCTIVITY; MEASURING INSTRUMENTS; TEMPERATURE MEASUREMENT; ANEMOMETERS; UNDERGROUND; ELECTRICAL PROPERTIES; LEVELS; PHYSICAL PROPERTIES; 150303* - Geothermal Exploration & Exploration Technology- Exploratory Drilling & Well Logging; 580203 - Geophysics- Geophysical Survey Methods- (1980-1989)

Citation Formats

Lord, D.E. In situ measurement system. United States: N. p., 1980. Web.
Lord, D.E. In situ measurement system. United States.
Lord, D.E. Mon . "In situ measurement system". United States.
@article{osti_5244981,
title = {In situ measurement system},
author = {Lord, D.E.},
abstractNote = {A multipurpose in situ underground measurement system comprising a plurality of long electrical resistance elements in the form of rigid reinforcing bars, each having an open loop hairpin configuration of shorter length than the other resistance elements. The resistance elements are arranged in pairs in a unitized structure, and grouted in place in the underground volume. Measurement means are provided for obtaining for each pair the electrical resistance of each element and the difference in electrical resistance of the paired elements, which difference values may be used in analytical methods involving resistance as a function of temperature. A scanner means sequentially connects the resistance-measuring apparatus to each individual pair of elements. A source of heating current is also selectively connectable for heating the elements to an initial predetermined temperature prior to electrical resistance measurements when used as an anemometer.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {11}
}