FISH COUNTING DEVICE, FISH COUNTING SYSTEM, AND FISH COUNTING METHOD

WIPO Patent Application WO/2019/035346

A1

[Problem] To achieve a fish counting device which makes it possible to economically and conveniently count fish. [Solution] A fish counting device 1 comprises: an ultrasonic wave transmitter/receiver 2; and a processing device 4. The ultrasonic wave transmitter/receiver 2 comprises a transmission/reception wave element for transmitting an ultrasonic beam 9 to the water in a first fish enclosure 11 connected to a second fish enclosure 12 via a path 13, the transmission/reception wave element being composed of a single channel and disposed in a position where the ultrasonic beam 9 does not intersect the path 13. The processing device 4 outputs a transmission signal for driving the ultrasonic wave transmitter/receiver 2 to the ultrasonic wave transmitter/receiver 2 and, on the basis of an echo signal input from the ultrasonic wave transmitter/receiver 2 which has received a reflected wave, acquires the number of fish that move from the path 13 to the first fish enclosure 11, passing through the ultrasonic beam 9 at such time.

YAMAGUCHI TAKEHARU (JP)
ITO MASANORI (JP)
YASUOKA TAKAMI (JP)

PCT/JP2018/028529

February 21, 2019

July 31, 2018

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FURUNO ELECTRIC CO (JP)

G06M7/00; A01K61/95; G01S15/96

JPH11296650A	1999-10-29
JP2005102638A	2005-04-21
JP2012225667A	2012-11-15
JP2011188806A	2011-09-29
JP3747308B2	2006-02-22
JP2589046B2	1997-03-12
US6317385B1	2001-11-13

HAN J.ASADA A.HONDA N. ET AL., FISHERIES SCIENCE, vol. 75, 2009, pages 1359 - 1367
HAN J.ASADA A.MIZOGUCHI M., JOURNAL OF THE MARINE ACOUSTICS SOCIETY OF JAPAN, vol. 36, no. 4, 2009, pages 250 - 257

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