In situ measurement system

Patent · Mon Nov 24 00:00:00 EST 1980

OSTI ID:5244981

Lord, D E

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.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy
• OSTI ID: 5244981
• Country of Publication: United States
• Language: English

Related Subjects

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)