Title:
【発明の名称】磁気ひずみ応力センサー
Document Type and Number:
Japanese Patent JP2001523348
Kind Code:
A
Abstract:
A magnetostrictive stress sensor is provided with a soft-ferromagnetic body having a grain structure, at least a part of the grains having a grain size in the transition region between the one-domain and the two-domain state. At this grain size, which is of the order of 1 to 9 mum for a ferrite body, a relatively large magnetostrictive effect occurs. In a practical embodiment, the ferromagnetic body is formed by a ferrite core, in particular a ferrite ring, around at least a part of which an electric oil is wound, which is incorporated in a measuring circuit for measuring changes in the self-induction of the coil under the influence of mechanical pressure exerted on the ferrite core.
Inventors:
Van der zarf peter ye
Somers Heraldas Highway
Somers Heraldas Highway
Application Number:
JP54444699A
Publication Date:
November 20, 2001
Filing Date:
March 01, 1999
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
G01B7/00; G01B7/24; G01G3/15; G01L1/12; H01L41/12; (IPC1-7): G01L1/12; G01B7/24; H01L41/12
Attorney, Agent or Firm:
Akihide Sugimura (2 outside)