| 摘要 |
PROBLEM TO BE SOLVED: To improve handleability of a magnetometric sensor for detecting the position of an object or its displacement. SOLUTION: This magnetometric sensor 100 is equipped with a magnetostrictive material 1, piezoelectric materials 2a, 2b bonded to the magnetostrictive material 1, and a permanent magnet 3. When installing the magnetometric sensor 100 near a detection object 11, a magnetic flux loop passing the magnetostrictive material 1 and a magnetic flux loop passing the detection object 11 are formed. When the gap length between the magnetometric sensor 100 and the detection object 11 is changed, a flow of the magnetic flux is changed, and the electric field intensity applied to the magnetostrictive material 1 is changed. Since the magnetostrictive material 1 is distorted corresponding to the intensity of an applied magnetic field, the piezoelectric materials 2a, 2b are deformed in accompany therewith, and a voltage corresponding to the deformation is generated. COPYRIGHT: (C)2005,JPO&NCIPI
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