发明名称 |
Determining stress in ferromagnetic materials from measurements of magnetic anisotropy and magnetic permeability |
摘要 |
PCT No. PCT/GB94/01022 Sec. 371 Date Nov. 16, 1995 Sec. 102(e) Date Nov. 16, 1995 PCT Filed May 12, 1994 PCT Pub. No. WO94/28407 PCT Pub. Date Dec. 8, 1994The absolute values of biaxial stresses in a ferromagnetic material (16) are measured using a probe (12) which comprises an electromagnet (26), a sensor (32) for stress-induced magnetic anisotropy (SMA) and a sensor (30) for directional effective permeability (DEP). The DEP sensor (30) enables absolute values of stress to be determined; the SMA sensor (32) enables the directions of the principal stress axes to be accurately determined, and improves the accuracy of the stress measurements.
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申请公布号 |
US5828211(A) |
申请公布日期 |
1998.10.27 |
申请号 |
US19950553272 |
申请日期 |
1995.11.16 |
申请人 |
AEA TECHNOLOGY PLC;CENTRO INFORMAZIONI STUDI ESPERIENZE SPA |
发明人 |
SCRUBY, CHRISTOPHER BRIAN;BUTTLE, DAVID JOHN;RAVENSCROFT, FIONA ANNE;DE MICHELIS, CARLO GUIDO;GORI, MASSIMO;ANTONELLI, GIAMPIERO |
分类号 |
G01L1/00;G01L1/12;G01N27/72;(IPC1-7):G01B7/24;G01R33/18 |
主分类号 |
G01L1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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