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首页> 外文期刊>The International Hydrographic Review >Determination of the Insonification Area of a Multi-beam Echo-sounder Using a Front Propagation
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Determination of the Insonification Area of a Multi-beam Echo-sounder Using a Front Propagation

机译：用前传播法确定多波束回声测深仪的声化区域

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By providing simultaneous depth measurements, Multi-beam Echo-Sounders can achieve swath coverage of the sea floor along the survey line with higher density and better resolution than single beam echo sounders. For example, the SIMRAD EM12-dual can cover a swath width up to seven times the depth. The coverage of a multi-beam echo-sounder (the .insonification area) depends on the swath width, which is a function of the depth and system opening angle. It also depends on the ship yaw, since perturbations of the heading act as a lever and can result in an irregular coverage. In order to perform a complete insonification, the line spacing is chosen accordingly to avoid 'holes'. However, the bottom being generally unknown, a control in real time acquisition remains necessary. This relies on a synthetic representation of the insonification area. The coverage is described using two contour-lines. The first one is outside the soundings set, the second one contours the holes. Both lines are generated for a given control radius, which enables a partial account of the insonification area of each beam, which depends, at the same time, on the system and the depth measured.
机译：通过提供同时的深度测量，与单束回声测深仪相比，多波束回声测深仪可以以更高的密度和更好的分辨率实现沿着勘测线覆盖海床的条带。例如，SIMRAD EM12-dual可以覆盖多达7倍深度的条带宽度。多波束回声测深仪（声穿透区域）的覆盖范围取决于扫描带宽度，该宽度是深度和系统打开角度的函数。这也取决于船的偏航，因为航向的扰动起杠杆作用，并可能导致不规则覆盖。为了执行完全声化，相应地选择行距以避免“孔”。然而，底部通常是未知的，实时采集的控制仍然是必要的。这依赖于超声区域的综合表示。使用两条轮廓线描述覆盖范围。第一个位于测深仪之外，第二个位于孔轮廓上。两条线都是针对给定的控制半径生成的，这可以部分考虑每个波束的声化区域，这同时取决于系统和测得的深度。

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