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Large-scope sea area seawater density measurement method

A seawater density and measurement method technology, applied in the field of ocean exploration, can solve problems such as low communication rate, low communication carrier frequency, and difficulty in ensuring power supply for underwater equipment, achieve accurate results, simple methods, and improve measurement accuracy and reliability Effect

Pending Publication Date: 2018-01-19
NANJING ZHONGTAN MARINE INTERNET OF THINGS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, compared with surface equipment, the communication rate of underwater equipment is much lower, and the frequency of the communication carrier is also much lower. In such a low-frequency (longer wavelength) communication carrier, it is difficult to accurately synchronize time information; It is also difficult to guarantee the power supply of underwater equipment, especially the long-term trouble-free operation of underwater active equipment is also difficult to guarantee

Method used

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  • Large-scope sea area seawater density measurement method
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  • Large-scope sea area seawater density measurement method

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Effect test

Embodiment 1

[0038] Devices for locating passive base points underwater, see figure 1 , comprising an underwater passive sensor 1 (such as an optical fiber acoustic wave sensor), an above-water data acquisition device 2, and an above-water sound source generator 3; the underwater passive sensor 1 and the above-water data acquisition device 2 are connected by an optical fiber 4; the above-water sound source generator 3 is connected with the water data acquisition device 2; the water sound source generator 3 is provided with a GPS positioning device.

Embodiment 2

[0040] The seawater density measuring method of large-scale sea area utilizes the device of embodiment 1, and this method comprises the following steps:

[0041] (1) Select an underwater base point, accurately calibrate the geographic location information G1 (longitude, latitude, elevation) of the base point, and place an underwater passive sensor 1 on the base point;

[0042] The method for accurately demarcating the geographical location information of the base point, using an underwater passive base point positioning device, comprises the following steps:

[0043] (1.1) The sound source generator 3 on the water sends a specific sound signal, and at the same time obtains the time and geographic location information when sending the sound signal through the GPS positioning device and sends it to the data acquisition device 2 on the water: when there is one sound source generator 3 on the water , a water sound source generator 3 sends specific sound signals at three different lo...

Embodiment 3

[0060] The multi-layer seawater density measuring method of large-scale sea area utilizes the device of embodiment 1, and this method comprises the following steps:

[0061] (1) Select an underwater base point and 2n-1 above-water base points, where n is the number of seawater layers;

[0062] (2) Accurately calibrate the geographic location information of the underwater base point, and place the underwater passive sensor 1 on the underwater base point;

[0063] (2) Place the water sound source generator 3 respectively on each water base point, and the water sound source generator 3 sends out specific sound signals respectively, obtains the time and geographic location information when sending the sound signal by the GPS positioning device simultaneously and sends to Water data acquisition device 2;

[0064] (3) The time when the underwater passive sensor 1 detects the sound signal is collected by the data acquisition device 2 on the water;

[0065] (4) According to the geog...

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Abstract

The invention provides a large-scope sea area seawater density measurement method. The method includes the steps of: according to base point geographical location information G1, and geographical location information G2 generated when an overwater sound source generator sends a sound signal, calculating the distance between the two points; according to a time T1 when an underwater passive sensor detects the sound signal, and a time T2 when the overwater sound source generator sends the sound signal, calculating the time needed by sound propagation, and acquiring sound propagation speed by theformula of distance / time; according to the incidence relation of the sound propagation speed in seawater and seawater density, calculating the seawater density of the sea area. The method changes theprevious idea of single point measurement, and changes the original single point monitoring to overall direct monitoring of a large water area, greatly improves the measurement accuracy and reliability, and meets the practical application needs.

Description

technical field [0001] The invention belongs to the field of marine exploration, in particular to a method for measuring seawater density in a large-scale sea area. Background technique [0002] The seacline phenomenon exists in the deep ocean, also known as the climatic layer, which refers to the water layer in which some hydrological elements in the seawater have sudden changes or discontinuous drastic changes in the vertical direction, indicating that the properties of the upper and lower seawater are different. There are four main types of seaclines, namely thermoclines, haloclines, densoclines and sonic clines. [0003] Seawater cliffs and submarines falling deep are the biggest hazards submarines face. It is reported that my country's No. 372 submarine recently encountered a "deep drop" that fell hundreds of meters in a few minutes. Roughly estimated by using the knowledge of fluid mechanics, if the "deep drop" of this intensity is caused by the salinity and temperat...

Claims

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Application Information

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IPC IPC(8): G01N9/00
CPCY02A90/30
Inventor 马宏坤何清何雪
Owner NANJING ZHONGTAN MARINE INTERNET OF THINGS CO LTD