紀要論文

時間領域一次元信号の揺らぎ周波数特性抽出とその一応用

Frequency analysis of time domain one dimensional signals and its one application

jpn

18807526

https://doi.org/10.15002/00006904

法政大学情報メディア教育研究センター

法政大学情報メディア教育研究センター研究報告

23

81

85

2010-06-01

Version of Record

可視化情報学会全国講演会(米沢2009)講演論文集

Ferromagnetic materials, i.e., iron steel and its composites, are widely used as the frame parts of various artificial products and constructions such as a building, bridge and so on. Because of its mechanical property, iron steel is most popular in use for the frame materials to maintain their mechanical strength. On the other side, nondestructive testing of iron steel is an extremely important way in order to keep their mechanical reliability. One of the deterministic differences between the ferromagnetic and nonmagnetic materials is that all of the ferromagnetic materials when applying external magnetic field attracts major magnetic fields; and also magnetization process of ferromagnetic materials always accompanies with the Barkhausen effect. The Barkhausen effect is a phenomenon caused by movement of the magnetic domains accompanying with the discontinuous magnetizations. In order to carry out the nondestructive testing of iron steels with high reliability, this paper proposes one of the signal cognition methodologies based on the fluctuation frequency characteristics of the Barkhausen signals.

Article