Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing
Abstract
Gravitational acceleration is measured in all spatial dimensions with improved sensitivity by utilizing a high temperature superconducting (HTS) gravimeter. The HTS gravimeter is comprised of a permanent magnet suspended in a spaced relationship from a high temperature superconductor, and a cantilever having a mass at its free end is connected to the permanent magnet at its fixed end. The permanent magnet and superconductor combine to form a bearing platform with extremely low frictional losses, and the rotational displacement of the mass is measured to determine gravitational acceleration. Employing a high temperature superconductor component has the significant advantage of having an operating temperature at or below 77K, whereby cooling may be accomplished with liquid nitrogen.
- Inventors:
-
- Downers Grove, IL
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 873053
- Patent Number(s):
- 6079267
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16C - SHAFTS
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; apparatus; measuring; gravitational; acceleration; utilizing; temperature; superconducting; bearing; measured; spatial; dimensions; improved; sensitivity; gravimeter; comprised; permanent; magnet; suspended; spaced; relationship; superconductor; cantilever; mass; free; connected; fixed; combine; form; platform; extremely; frictional; losses; rotational; displacement; determine; employing; component; significant; advantage; operating; below; 77k; whereby; cooling; accomplished; liquid; nitrogen; superconducting bearing; spaced relationship; improved sensitivity; spaced relation; temperature superconductor; permanent magnet; operating temperature; temperature superconducting; liquid nitrogen; rotational displacement; significant advantage; gravitational acceleration; superconductor component; /73/74/310/
Citation Formats
Hull, John R. Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing. United States: N. p., 2000.
Web.
Hull, John R. Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing. United States.
Hull, John R. Sat .
"Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing". United States. https://www.osti.gov/servlets/purl/873053.
@article{osti_873053,
title = {Method and apparatus for measuring gravitational acceleration utilizing a high temperature superconducting bearing},
author = {Hull, John R},
abstractNote = {Gravitational acceleration is measured in all spatial dimensions with improved sensitivity by utilizing a high temperature superconducting (HTS) gravimeter. The HTS gravimeter is comprised of a permanent magnet suspended in a spaced relationship from a high temperature superconductor, and a cantilever having a mass at its free end is connected to the permanent magnet at its fixed end. The permanent magnet and superconductor combine to form a bearing platform with extremely low frictional losses, and the rotational displacement of the mass is measured to determine gravitational acceleration. Employing a high temperature superconductor component has the significant advantage of having an operating temperature at or below 77K, whereby cooling may be accomplished with liquid nitrogen.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 2000},
month = {Sat Jan 01 00:00:00 EST 2000}
}
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Gravimeter using high-temperature superconducting bearing
journal, June 1999
- Hull, J. R.; Mulcahy, T. M.
- IEEE Transactions on Appiled Superconductivity, Vol. 9, Issue 2
A Superconducting Gravimeter
journal, September 1968
- Prothero, W. A.; Goodkind, J. M.
- Review of Scientific Instruments, Vol. 39, Issue 9