A Vertical Array System Suitable for Acoustic Hydrographic Surveying in High Latitude Extremely Cold Sea Areas

Abstract

The invention discloses a vertical array system suitable for acoustics hydrographic survey in a high latitude extremely cold sea area. The vertical array system comprises a plurality of hydrophones, which are serially connected through a high strength cable. Each hydrophone comprises a high sensitivity hydrophone head, which is used to receive marine environmental noises and underwater acoustic communication signals; a signal collecting and conditioning circuit, which is used to collect and condition the high sensitivity hydrophone head; a sensor module, which is used to collect the information of pressure, temperature, dip angle, acceleration speed, and azimuth and comprises a pressure sensor, a dip angle sensor, an acceleration speed sensor, a temperature sensor, and an azimuth sensor; a main controller, which is used to control the data transmission between each module; and a high precision real time clock, which is used to realize crude precision synchronization of all hydrophone nodes. The provided system is not limited by the cable, the electrical equipment in the vertical array can be used in an extremely cold environment, and thus the whole system can be used in deep sea acoustic measurement of seas of North Pole and seas next to North Pole.

Description

technical field [0001] The invention relates to the field of ocean acoustic measurement, in particular to a vertical array system suitable for acoustic hydrological measurement in high-latitude extremely cold sea areas. Background technique [0002] In recent years, due to the impact of global warming, the ice caps in the Arctic region have continued to shrink. The rich natural resources in the sea area and the increasing frequency of Arctic shipping routes have attracted great attention from all countries in the world. Arctic hydroacoustics, as a subject to study the environmental effects of underwater acoustics in the Arctic and its adjacent seas, has become a research hotspot under this background, and new research content has also been proposed. The Arctic region has a unique geographical location. Most of the area is covered by sea ice all year round, and the temperature is extremely low. The average temperature in the coldest January is between -20°C and -40°C, and the...

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Problems solved by technology

[0004] 1. Since the sea area used by the vertical array is covered by crushed ice, the cables are extremely vulnerable to damage caused by the movement of crushed ice during the measurement process. Once the cables controlling the nodes of the hydrophones are damaged, the measurement work of the entire measurement system will be seriously affected. influences

[0005] 2. The vertical array composed entirely of self-contained hydrophone nodes is not controlled during data sampling, and the sampling rate and sampling time cannot be changed during the measurement process. In addition, the current self-contained hydrophones are not intelligent enough, which also limits Flexibility in the use of vertical arrays of self-contained hydrophones

[0006] The bulky vertical array brings great inconvenience to operators in transportation and deployment, especially in extremely cold and low temperature regions

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