| 摘要 |
PURPOSE:To obtain the titled apparatus having high sensitivity, high accuracy and high durability, by arranging a wire loop so that the surface thereof is parallel to an axial line and the whole of the wire loop becomes symmertrical with respect to the axial line. CONSTITUTION:The hinge 2A on a base stand 1A consists of a cylindrical fixed part 2A-1, a distortion part 2A-2 comprising radial plate shaped members 2A-2' and a movable part 2A-3. A wire loop 7A having a rectangular shape is fixed to the movable part 2A-3 through an attachment member 6a and a shaft 6B so that the wire loop surface 7A' of said wire loop 7A contains an axial line Z-Z' and a pair of opposed sides of the wire loop 7A become parallel and symmetric to the axial line Z-Z'. When an external magnetic field H is present in the direction at right angles to the axial line Z-Z' and parallel to the wire loop surface 7A', AC voltage, of which the amplitude is proportional to the magnetic field H, the amplitude of angular vibration and the frequency thereof, is generated in the output terminal 8A of the wire loop 7A and, by keeping the amplitude and frequency of this angular vibration constant by a drive circuit 5A, the output of the wire loop 7A is proportional to the magnetic field H.
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