Abstract
This paper is concerned with the development of micro magnetic fluid diaphragm driven by alternating magnetic field. The micro magnetic fluid diaphragm is composed of a ring-shaped permanent magnet and kerosene-based magnetic fluid. The response characteristics on the relations between input and output signals were examined by using a photodiode detector system and a digital high-speed video camera system. Sinusoidal, triangle, square, and saw tooth waves as input signals were examined. The magnetic fluid device showed good responses even at the frequency f0=1000 Hz in alternating field.
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