Characteristics in the Opening and Closing Operations of Micro Magnetic Fluid Diaphragm Mechanism by Alternating Magnetic Field

Abstract

Response characteristics in the opening and closing operations of the micro magnetic fluid diaphragm mechanism by the alternating magnetic field are described. The micro magnetic fluid diaphragm mechanism was composed of a ring shaped permanent magnet and kerosene-based magnetic fluid. The driving principle of micro magnetic fluid device was based on the surface phenomena of magnetic fluid adsorbed on a permanent magnet. The opening and shutting time of diaphragm mechanism in the alternating magnetic field was measured by high-speed video camera system. The details of magnetic fluid surface response in the opening and closing operations of magnetic fluid hole were revealed experimentally.

Dynamics of a Water Droplet Subjected to Forced Vibration by Surface Acoustic Wave Device

“…The dynamic behavior of the water droplet subject to ultrasonic vibration was observed by the high-speed video camera analysis system. Two kinds of cameras were used as the high-speed video camera analysis system [8]. One is Photron FASTCAM-Ultima SE (for long time recording) and the other is Shimadzu Hyper Vision HPV-2A (for high speed short time recording).…”