发明名称 |
ACOUSTIC POSITION MEASURING APPARATUS |
摘要 |
PURPOSE:To improve the S/N ratio of an acoustic measuring apparatus by compensating the phase or delay of the output signal of a number of acoustic wave receivers arranged on one plane to thereby form a number of receiving beams and processing them to thereby calculate the relative position between the sound source and the receiver array. CONSTITUTION:A number of (more than 4) acoustic receivers 21-2N are arranged on one plane to form an acoustic receiver array 1, which is mounted on a bottom in a ship such as a measuring vessel. After acoustic signals received by the receivers 21-2N are amplified to adequate level by amplifiers 31-3N, respectively, they are applied to a beam former 4 to thereby compensate the delay or phase of the output signals from the amplifiers 31-3N. Then, these signals are added to simultaneously form a number of received beams B1-BM having main lobes so that their sensitivity becomes maximum only for the plane wave incident from certain direction toward the center of the array 1 to thereby produce acoustic signal intensities SP1-SPm obtained by the beams B1-BM having slightly different directions of their main lobes to a selector 5. |
申请公布号 |
JPS5544915(A) |
申请公布日期 |
1980.03.29 |
申请号 |
JP19780117782 |
申请日期 |
1978.09.25 |
申请人 |
OKI ELECTRIC IND CO LTD;KAIYO KAGAKU GIJUTSU CENTER |
发明人 |
NAKANISHI TOSHIYUKI;ITORI KAZUHIKO |
分类号 |
G01S5/18;G01S5/20;(IPC1-7):01S5/18 |
主分类号 |
G01S5/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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