| 摘要 |
PURPOSE:To derive a distance even in case of a target for moving at an equal speed, at the same azimuth and in the same direction by measuring the acoustic pressure in plural positions by plural frequencies by a passive sonar, deriving the distance, based on these measured values and combining it with azimuth information. CONSTITUTION:Acoustic pressure in plural positions being different from each other, related to a target 1 for moving its position as time elapses is measured by plural frequencies by a passive sonar 2 in the fixed position. Based on these plural pieces of measured values, distances r1, r2 extending from the passive sonar 2 to the target 1 are derived, and thereafter, a azimuth information of the target 1 and the distances r1, r2 are combined and a position of the target 1 is determined thereby. |
