公开(公告)号：US20210286061A1

公开(公告)日：2021-09-16

申请号：US17275872

申请日：2019-09-12

Applicant: IXBLUE

Inventor： Didier CHARLOT

IPC: G01S7/53 ,  G10K11/20 ,  G01S15/42 ,  G01S15/89

Abstract: Disclosed is a method for determining a difference in depth or a lateral distance in relation to the vertical between two points of an underwater environment, in particular by measuring a propagation time of a sound wave. The determination is based on a single-layer model of the environment in which the wave is supposed to propagate in a straight line along an effective propagation direction, at a mean velocity that is independent of the propagation direction. Also disclosed is a method for determining the profile of the mean velocity based on the measurements of differences in depths per se, a determination of the local velocity profile over the variation interval of the sounded depths, and a related sonar system.

公开(公告)号：US20160124081A1

公开(公告)日：2016-05-05

申请号：US14895720

申请日：2014-05-28

Applicant: IXBLUE

Inventor： Didier CHARLOT ,  Sebastien PENNEC

IPC: G01S7/52 ,  G01S15/87 ,  G01S1/76

CPC classification number: G01S7/52004 ,  G01S1/76 ,  G01S15/874

Abstract: A metrology method and device for calibrating the geometry of a network of Nb stationary underwater acoustic beacons (11, 12, 13, 14) defining a field of beacons, implementing a moving body (20) including elements for receiving acoustic signals from each of the beacons of the network, respectively. The metrology method includes the following steps: acquiring Nm series of Nb acoustic measurements of the relative distance between the moving body and each beacon of the network, respectively, during a movement of the moving body; calculating a numeric function C from the series of acoustic measurements of the relative distances and parameters representing relative positions of the beacons; executing an algorithm for minimising the numeric function C in order to deduce therefrom an estimation of the values of the relative position parameters of each of the beacons of the network.

Abstract translation: 一种用于校准限定了信标领域的固定水下声信标（11,12,13,14）的网络的几何形状的计量方法和装置，实现了一个移动体（20），该移动体包括用于接收每个 分别是网络的信标。 计量方法包括以下步骤：在移动体运动期间分别获取移动体与网络每个信标之间的相对距离的Nb系数的Nb声学测量值; 从表示相关位置的相对距离和参数的一系列声学测量中计算数字函数C; 执行用于使数字函数C最小化的算法，以便从其推导出网络的每个信标的相对位置参数的值的估计。

公开(公告)号：US20200264290A1

公开(公告)日：2020-08-20

申请号：US15774970

申请日：2016-11-09

Applicant: IXBLUE

Inventor： Fabien NAPOLITANO ,  Didier CHARLOT

IPC: G01S7/497 ,  G01S17/89 ,  G01S7/481 ,  G01S19/42

Abstract: Disclosed is a bathymetric system including a multi-beam emitting and receiving device attached to a carrier vehicle, configured, in a first recurrence, to measure the amplitude of a first plurality of beams reflected off the seabed, and a computer to determine three-dimensional spatial coordinates of a first scan swath. In a second recurrence, the device emits a second incident beam and measures the amplitude of a second plurality of beams reflected off the seabed, the computer determines the three-dimensional spatial coordinates of a second scan swath, so that at least one probe point of the first scan swath is redundant with a probe point of the second scan swath, and the computer calculates an altitude variation of the carrier vehicle using altitude variations of the at least one redundant probe point between the first recurrence and the second recurrence.