STRESS IMPEDANCE ELEMENT AND METHOD OF MANUFACTURING THE SAME

Title:

STRESS IMPEDANCE ELEMENT AND METHOD OF MANUFACTURING THE SAME

Document Type and Number:

Japanese Patent JP2003042860

Kind Code:

A

Abstract:

To obtain a low-cost stress impedance element whose reliability is satisfactory.

In the stress impedance element, when an AC current is applied, an impedance is changed by depending on an external stress, a core is formed as a core wire 11 composed of a conductive material, and its outer circumferential part is formed as a magnetostrictive layer 12 comprising magnetostriction. The magnetostrictive layer is formed of any material from among an Fe-Ni material, a Co-Ni material, a Co-Fe material and an Ni material by an electrolytic plating method. The method is performed in such a way that the core wire is connected to a cathode, that a weight of a nonconductive material is installed at its lower end, and that the weight is surrounded with an anode plate so as to make the distance between the core wire and the anode plate definite.

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Inventors:

YAMASHITA SHINJI
HARA KENJI
FUKUSHIMA HISAAKI
AKIYAMA TETSUYA

Application Number:

JP2001231871A

Publication Date:

February 13, 2003

Filing Date:

July 31, 2001

Export Citation:

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Assignee:

YASKAWA ELECTRIC CORP

International Classes:

G01L1/12; (IPC1-7): G01L1/12

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