Rotational vibration testing apparatus
AssigneeFujitsu Limited
InventorsAkihide Jinzenji, Keiji Aruga
Life of this patent
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Abstract
A small-sized rotational vibration testing apparatus having a wide band of measuring frequencies and capable of directly driving a rotary table (1) to oscillate or vibrate in a rotational direction under the action of torque generated by a vibration applying mechanism. The rotary table (1) is rotatably mounted on a base (2), and a plurality of coil frames (14) each having a coil (13) attached thereto are mounted on a flange (1c) of the rotary table (1) at an equal circumferential pitch or interval about its axis of rotation. A plurality of magnetic circuits (12) are fixedly secured to the base (2) in such a manner that the center of each coil (13) is positioned at the center of an associated magnetic circuit (12).
Claims20
A rotational vibration testing apparatus comprising:
- a base;
- a rotary table rotatably supported on said base through a shaft of said rotary table;
- and
- a vibration applying mechanism for driving said rotary table to oscillate or vibrate in a rotational direction about the axis of said shaft which acts as an axis of rotation;
- said vibration applying mechanism comprising:
- a magnetic field generating unit for generating magnetic fields;
- a coil unit arranged to traverse the magnetic fields generated by said magnetic field generating unit;
- and
- a power supply unit for supplying current to said coil unit while alternately changing the direction of flow of the current;
- wherein one of said magnetic field generating unit and said coil unit is mounted on said base, and the other thereof is mounted on said rotary table.
Dependencies are inferred from the claim text.