Method for preventing deterioration of submarine structure and ultrasonic vibration unit used for the method
AssigneesRichter Corporation, Erocia Corporation
InventorsTakanori Shigihara, Masaki Kobayashi
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Abstract
An ultrasonic vibration and a voltage are applied to a submerged marine structure to exert thereon vibrational and electric energies, thereby effecting deterioration prevention of the structure. An ultrasonic vibration unit comprises an ultrasonic vibrator made from a piezoelectric ceramic plate with an electrode on each side thereof; power supply wires connected to the respective electrodes; a support member for fixedly supporting the ultrasonic vibrator and transmitting the ultrasonic vibration to the structure; and a resin coat for protecting the ultrasonic vibrator against seawater. The ultrasonic vibration unit is used for preventing deterioration of the submerged marine structure.
Claims6
A method of preventing deterioration of a submerged marine structure, comprising applying an ultrasonic vibration and a voltage to the structure to exert thereon vibrational and electric energies, wherein a power source is connected such that the structure acts as an electrode, and wherein the voltage is applied to the structure from the power source, the voltage having an AC voltage component in synchronization with the vibrational waveform of the ultrasonic vibration.
Dependencies are inferred from the claim text.