A method of measuring subglacial water depth

Abstract

The invention discloses an under-ice water-depth measuring method, and belongs to the field of underwater sound. Vibration signals are firstly generated by striking a shot, the signals which arrive atan ice layer wave detector via the ice surface are first triggering signals, secondly, part of the signals which are reflected by the lower surface of ice and enter the wave detector are second ice layer reflection signals, and another part of the signals which are refracted by the lower surface of the ice layer and arrive at seawater, are transmitted in the ice layer through the reflection of the sea bottom and the refraction of the lower surface of the ice layer, and finally arrive at the ice layer wave detector are third sea bottom reflection signals. By analyzing the collected data, the time interval between the time for the interface of the sea bottom to reflect the signals and the time for the ice surface to reflect the signals is determined, and thus the water depth is determined according to the sound velocity in water. Compared with an existing method of chiseling the ice layer to measure the water depth, the under-ice water-depth measuring method can greatly shorten the timefor measuring outdoors under a bad polar region environment, and the accident rate caused when working personnel work outdoors for a long time is greatly reduced.

Description

technical field [0001] The invention belongs to the field of underwater acoustics, and in particular relates to a method for measuring water depth under ice. Background technique [0002] In recent years, my country's ocean-related undertakings have developed rapidly, and various hydrological parameters have become indispensable factors in the development. Among them, the measurement of the depth of the underwater submersible is of great significance to the development of naval equipment and marine exploration and development. With the development of electronic technology and sensor technology, people have higher and higher requirements for real-time and accurate measurement of water depth. Ultrasonic or pressure sensors are two methods of underwater depth measurement. The former uses acoustic wave echo technology to measure water depth, and the latter uses hydrostatic pressure in water to convert water depth. Each has its own advantages and disadvantages. Ultrasonic measur...

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Problems solved by technology

[0003] At present, when ultrasonic or pressure sensors are used to measure the water depth on the ice surface, both of them also need to drill through the ice layer. Due to the harsh external environment in the polar region, it is extremely difficult to drill through the ice layer to measure the water depth.

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