| 摘要 |
PROBLEM TO BE SOLVED: To provide a velocity sensor capable of reducing the size and weight with a simple structure. SOLUTION: The velocity sensor includes a cylindrical first permanent magnet 11, a cylindrical second permanent magnet 12 disposed outside the first permanent magnet 11 with its inner circumferential surface disposed opposite the outer circumferential surface of the first permanent magnet 11, a cylindrical coil 14 disposed between the outer circumferential surface of the first permanent magnet 11 and the inner circumferential surface of the second permanent magnet 12, and spring outer electrodes 17, 18, 19 supporting the cylindrical coil 14 movably in an axial direction and elastically deformed when the cylindrical coil 14 is moved from a prescribed position in the axial direction. The cylindrical first permanent magnet 11 is magnetized in a radial direction, and the cylindrical second permanent magnet 12 is magnetized in a radial direction so that its magnetic poles are reverse to those of the first permanent magnet 11. COPYRIGHT: (C)2010,JPO&INPIT |
