Furuno Electric Company Limited

Kouzo Tokuyama

Yasushi Nishimori

Akira Okunishi

Hiroshi Iino

Yasushi Hiraoka

Koji Tokuda

Kazuhiko Nobunaga

Kenichi Watanabe

Ryouichi Suetoshi

Masahiro Takase

Atsushi Kajiwara

Mitsuhiro Takeda

Koji Yokuda

A trawl net () is attached to ends of warps () extending from a ship (), such as a trawl boat, in the sternward direction, and a transponder () to transmit a response signal is attached to an upper part of a net mouth of the trawl net (). The ship () forms a transmission beam TB of a detection signal by a transducer () at the bottom of the ship, and performs detection in the detection range. The transponder () receives the detection signal, and forms a transmission beam TPB of a frequency different from that. A detection image and a position display image of the transponder are superposed and displayed on a display of a scanning sonar or are displayed side by side.

Ultrasonic wave transmitting and receiving system for detecting underwater objects

An acoustic transducerhas a first cylindrical portionA and a second hemispherical portionB on which a plurality of transducer elementsare arranged. The transducer elements on the cylindrical portion are arranged to have six nearest neighbors. The arrangement may be such that the six transducer elements surrounding a given element describe the vertices of a regular hexagon. The hexagons thus described may be aligned so that two of their sides are parallel to the axis of the cylinder. The elements on the hemispherical portion may be arranged so that some elements have five nearest neighbors and others have six (the neighboring elements describing, for example, the vertices of hexagons and pentagons respectively). An underwater sounding apparatus may be constructed using the transducer.

Acoustic transducer and underwater sounding apparatus

Ultrasonic diagnostic apparatus

Growing community of inventors

Nishinomiya, Japan

Kouzo Tokuyama