To provide a hydrospace detection device having a new fish species discrimination function capable of correctly discriminating a fish species.
An arithmetic processing part 14 of the hydrospace detection device 1 detects a single fish from an echo signal acquired (S101). The arithmetic processing part 14 detects an incidence angle for each single fish detected (S102). The arithmetic processing part 14 calculates a reflection intensity TS of each single fish for which the incidence angle is detected (S103). The arithmetic processing part 14 compares incidence angle characteristics of the calculated reflection intensity TS with template characteristic curve set for each fish species. The arithmetic processing part 14 selects a fish species corresponding to the template characteristic curve to which the incidence angle characteristics of the calculated reflection intensity TS is the most similar (S104).
NISHIMORI YASUSHI
OGAWA SHINJI
ITO MASAKI
MATSUO YUKIO
IMAIZUMI TOMOHITO
AKAMATSU TOMONARI
TOHOKU GAKUIN
FISHERIES RESEARCH AGENCY
| JP2010261883A | 2010-11-18 | |||
| JP2011052990A | 2011-03-17 | |||
| JP2008267834A | 2008-11-06 | |||
| JPH0290886A | 1990-03-30 |
JPN6015002659; 澤田浩一: '"魚のターゲットストレングスの高精度推定に関する研究"' 水産総合研究センター研究報告 Ｎｏ．２, 200202, ｐ．４７-１２２
JPN6012039810; 向井 徹 Ｔｏｈｒｕ Ｍｕｋａｉ，佐野 典達 Ｎｏｒｉｔａｔｓｕ Ｓａｎｏ，飯田 浩二 Ｋｏｈｊｉ Ｉｉｄａ，佐々木 成二 Ｓｅｉｊｉ Ｓａｓａｋ: '"東シナ海で漁獲された主要１０魚種のターゲットストレングスの測定 Ｓｔｕｄｉｅｓ ｏｎ Ｄｏｒｓａｌ Ａｓｐｅｃｔ Ｔａｒｇｅｔ Ｓｔ' 日本水産学会誌 Ｖｏｌ．５９，Ｎｏ．９, 199309, ｐ．１５１５-１５２５, 公益社団法人日本水産学会
JPN6015002661; 向井徹、外３名: '"東シナ海で漁獲された魚の背方向ターゲットストレングスと鰾との関係"' 日本水産学会誌 Ｖｏｌ．６０， Ｎｏ．２, 1994, ｐ．２１５-２２２
JPN6015002660; Ｔｏｍｏｈｉｔｏ Ｉｍａｉｚｕｍｉ， ｅｔ ａｌ．: '"Ｍｅａｓｕｒｉｎｇ ｔｈｅ ｔａｒｇｅｔ ｓｔｒｅｎｇｔｈ ｓｐｅｃｔｒａ ｏｆ ｆｉｓｈ ｕｓｉｎｇ ｄｏｌｐｈｉｎ-ｌｉｋｅ ｓｈｏｒｔ ｂｒｏａｄｂａｎｄ ｓｏｎａｒ ｓｉｇｎａｌｓ"' Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ａｃｏｕｓｔｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ａｍｅｒｉｃａ Ｖｏｌ．１２４， Ｎｏ．６, 200812, ｐ．３４４０-３４４９