| 摘要 |
PROBLEM TO BE SOLVED: To reduce a problem of interference caused by transmitting of supersonic wave from a plurality of underwater detection devices for an underwater detection system equipped with a pluraliy of underwater detection devices and, also, to clear off effects from rolling and the like. SOLUTION: A waveform data generating section 16 generating waveform data as the origin of transmitted signals from each channel using rolling angle and the like output regularly from a fluctuation detector 40 so as to generate transmitted beam in a predetermined detecting direction. This waveform data are written into a first or a second memory 15a and 15b according to a predetermined criterion. When a controller 3 of a scanning sonar 50 receives a transmitting command of supersonic wave from a fish finder 100, a memory control circuit 14 begins to read the waveform data from the memory 15 which memorizes the newest waveform in either the first or the second memories 15a and 15b. The read out waveform data are changed to the transmitted signals consisting of sinusoidal waves in a transmitted signal generating circuit 13 and transmission of supersonic wave is started by driving an oscillator 2 through the transmitted signals. COPYRIGHT: (C)2006,JPO&NCIPI
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