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Reduction of the sides of the maxima in the case of ultrasound - depth sounder method
Reduction of the sides of the maxima in the case of ultrasound - depth sounder method
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机译:超声深度测深法减少最大值的边
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摘要
An improved method and apparatus for reducing the echoes from reflectors disposed outside the focal line in an echo-sounding process using an ultrasonic field focusing in a focal line. A pulsed ultrasonic wave is transmitted having a cross-sectional area corresponding to one or more annularly arranged transducer segments having a total azimuth angle of less than 360 DEG . Echoes of the transmitted wave are received from the spatial region corresponding to at least a part of other annular transducer segments, which complement the annular segments of the cross-sectional area of the transmitted ultrasonic pulse to form a complete ring. The radiation or receiving surfaces of the transducer segments forming the transducer ring are inclined toward the axis of the ring.
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