DEVICE FOR ACQUISITION OF UNDERWATER VIDEO

摘要

PROBLEM TO BE SOLVED: To overcome problems in an underwater video acquisition device that applies a frequency sweep system enabling steering of a wave transmission beam by altering the frequency of an electric signal input into a transmitter and has an acoustic lens for converging reflective sound wave from a target on the front surface of a receiver wherein the acquired acoustic image is not necessarily clear, and a design is not done considering miniaturization of an electronic circuit scale of the underwater video acquisition device for suppressing a side lobe and grating lobe that cause virtual image or noise of the acoustic image.

SOLUTION: The underwater video acquisition device connects one or a plurality of transmission signals of any frequency having a pulse width of time Lsinθi/νat which all ultrasonic waves transmitted from an acoustic conversion element are composed.

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