| Issue |
J. Phys. Colloques
Volume 42, Number C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-1123 - C5-1128 | |
| DOI | https://doi.org/10.1051/jphyscol:19815173 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-1123-C5-1128
DOI: 10.1051/jphyscol:19815173
1 Process Technology R & D Laboratories, Nippon Steel Corporation, Kitakyushu-City, Japan
2 Fundamental Research Laboratories, R. & D Bureau, Nippon Steel Corporation, Kawasaki, Japan
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-1123-C5-1128
DOI: 10.1051/jphyscol:19815173
AUTOMATION OF INTERNAL FRICTION MEASUREMENT APPARATUS OF INVERTED TORSION PENDULUM TYPE
I. Yoshida1, 2, T. Sugai2, S. Tani2, M. Motegi2, K. Minamida2 et H. Hayakawa21 Process Technology R & D Laboratories, Nippon Steel Corporation, Kitakyushu-City, Japan
2 Fundamental Research Laboratories, R. & D Bureau, Nippon Steel Corporation, Kawasaki, Japan
Abstract
The design of an automated internal friction apparatus of inverted torsion pendulum type is described. The wave-form analysis, instead of the traditional wave-height analysis, was employed. In addition to the omission of manual operation or supervision, the accuracy of measurement was increased so much, because, through Fourier transformation of the wave form of a damped oscillation, the disturbing components of parasitic motions such as lateral or precessional one of the pendulum are separated out from the genuine torsional motion and eliminated on calculating the decay constant.