P2-33 Characteristics of High Frequency Sound Irradiated from Electromagnetically Driven Plate(Short oral presentation for posters)

概要

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An ultrasonic oscillator, which electromagnetically generates ultrasound by vibration of an iron plate in the alternating magnetic field, is newly proposed for high temperature use. Low Curie point for a normal transducer made of piezoelectric material is overcome by use of a ferromagnetic iron plate that has a high magnetic Curie temperature (1043 K). The joule heating of a ferromagnetic iron plate is observed by the infrared camera, and the heating rate of a ferromagnetic iron plate is calculated. The rate of the Joule heating is closely related to the Lorentz force with which the plate is electromagnetically vibrated. From the viewpoint of Joule heating, the effects of various process parameters on the sound pressure are discussed. The magnetic field can be concentrated on the center of the iron plate by setting the water-cooled iron pole in the induction coil, and it is expected that the iron plate can be vibrated more strongly.
超音波エレクトロニクスの基礎と応用に関するシンポジウム運営委員会の論文
2005-11-16