Vessel-mounted preset terrain mode water body vertical section investigation system and method

Abstract

The invention provides a vessel-mounted preset terrain mode water body vertical section investigation system and a vessel-mounted preset terrain mode water body vertical section investigation method. The investigation method comprises the following steps of: providing a preset submarine topographic map; setting measuring area, measuring density, measuring point position and throwing depth in a voyage scope according to the preset submarine topographic map; before arriving at each measuring point, giving the position of the optimal throwing point according to the current ship speed and the set measuring point; and when arriving at the position, commanding a winch to throw a falling body according to the set cable-laying speed and length immediately to make the falling body achieve the set depth at the measuring point, wherein the submarine topographic map comprises the data of actual seabed depth. In the investigation system and method, a preset submarine topographic map mode is adopted for measurement as deep as possible according to an actual submarine topography so as to obtain more adequate seawater vertical section data and meet increasingly growing requirements on water body investigation. Besides, a ship-borne depth sounder is avoided, and the data reliability and measuring efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of water body measurement, in particular to a system and method for surveying a vertical profile of a water body in a navigational preset terrain mode. Background technique [0002] At present, with the rapid progress of science and technology, the development, utilization and protection of human water resources (including oceans, rivers and lakes) are also developing by leaps and bounds. To develop and utilize water resources, we must first understand the water body, and hydrographic measurement of the water body is a way to understand the water body. [0003] For example, in physical oceanography, as the temperature and salinity of water layers at different depths change, the speed of sound also changes. Obtaining the above water body parameters in a specific sea area can be used for ocean mapping such as sonar velocity measurement and ranging; and For example, measuring water body parameters such as temp...

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Problems solved by technology

[0013] However, the problem is that in order to obtain more comprehensive vertical profile data, the depth of the seabed measured in real time by the ship-borne depth sounder is generally used to correct the depth of each throwing, so that the falling body can be as close to the seabed as possible within a safe range. This function cannot be used when the error of the depth sounder is large or disabled, and the depth sounder is not equipped

In this state, for the sake of safety, we can only use the minimum seabed depth in the measured sea area as a basis to formulate a fixed safe throwing depth. In this way, during the navigating measurement process, the throwing depth of the falling body is fixed. Often the falling body starts to recover at a position far away from the preset depth safety value, and a sufficient depth cannot be fully measured

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