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Patent Searching and Data


Title:
底質探知装置
Document Type and Number:
Japanese Patent JP4585838
Kind Code:
B2
Abstract:

To provide bottom sediment detection system capable of exactly estimating bottom sediment, using a multi-beam method.

The bottom sediment detection system acquires water depth data DP and reflection intensity data DR from ultrasonic reflection signals (S1) received, removes the effect of the water depth from the actually measured reflection intensity data DR and calculates reflection intensity data SSA, leaving only the effect of reflection area (S2). Then, the bottom sediment detection system calculates the normal vector of the sea-bottom surface corresponding to the reflection intensity data SSA and calculates the incidence angle of the ultrasonic wave signal and the reflection area S(A) of the sea-bottom surface (S5 to S6). The bottom sediment detection system calculates reflection intensity data SS in a complementary angle direction from the reflection intensity data SSA and reflection area S(A) and converts into reflection intensity data SS90 in the normal direction (S7 to S8). Then, the bottom sediment detection system estimates the bottom sediment from the reflection intensity data SS in the normal direction (S10).

COPYRIGHT: (C)2006,JPO&NCIPI


Inventors:
Shuji Morimatsu
Teruyuki Ozaki
Yasunobu Asada
Mitsuaki Watanabe
Application Number:
JP2004350198A
Publication Date:
November 24, 2010
Filing Date:
December 02, 2004
Export Citation:
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Assignee:
FURUNO ELECTRIC COMPANY,LIMITED
International Classes:
G01S15/89; G01S15/96
Domestic Patent References:
JP10221447A
JP2002148337A
JP58160879A
JP11052048A
Other References:
日本水路協会,海底面画像データを用いた底質分類及び地形歪み除去に関する研究 その2,財団法人 日本水路協会,日本,財団法人 日本水路協会,2004年 3月,118,pp.1-3
Attorney, Agent or Firm:
Hisao Komori