发明名称 |
Ship detection method. |
摘要 |
If operating noise radiated from a ship is received and stands out against a general background noise, a ship is detected. A problem is presented by detection at low signal-to-noise ratio. In order to achieve a greater reliability of detection even in that case, a method is provided in which the noise received is examined in relation to the pattern of its envelope with respect to time and a ship is only detected if the pattern with respect to time exhibits variations which are characteristic of an amplitude-modulated noise. A device for implementing the method is provided which can be used particularly advantageously in underwater sound technology in panoramic level indicating systems. |
申请公布号 |
EP0213541(A2) |
申请公布日期 |
1987.03.11 |
申请号 |
EP19860111468 |
申请日期 |
1986.08.19 |
申请人 |
FRIED. KRUPP GESELLSCHAFT MIT BESCHRANKTER HAFTUNG |
发明人 |
ARENS, EGIDIUS;MEYERSIECK, MANFRED;SCHULTE, ALFRED |
分类号 |
G01V1/00;(IPC1-7):G01V1/00 |
主分类号 |
G01V1/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|