Construction of a displacement sensor using a superconducting YBCO cylinder

Author

Ohyama, Takashi ; Itoh, Mineo

Author_Institution

Dept. of Instrum. Eng., Kobe Univ., Japan

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

837

Lastpage

841

Abstract

The characteristics of a displacement sensor, such as sensitivity and linearity, were found to be improved by the use of a superconductor. The sensor was constructed of a superconducting YBCO cylinder, an excitation coil, and a differential coil. The cylinder can be shifted ±12 mm along the axial direction of the differential coil by moving a holder attached to the cylinder. Experimental results indicate that the characteristics of the displacement sensor such as sensitivity, linearity, and stability are improved over those of nonsuperconducting metal rods. The authors also examine the electrical properties of cylinders constructed with and without a concentration of silver powder

Keywords

barium compounds; displacement measurement; electric sensing devices; high-temperature superconductors; superconducting devices; yttrium compounds; YBaCuO; differential coil; displacement sensor; electrical properties; excitation coil; high-temperature superconductors; linearity; sensitivity; stability; Displacement measurement; Engine cylinders; Linearity; Magnetic sensors; Nitrogen; Powders; Sensor phenomena and characterization; Superconducting coils; Temperature sensors; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.120008

Filename

120008