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Strapdown underwater dynamic gravity measurement instrument

A technology of gravity measurement and gravimeter, which is applied in the direction of measuring device, gravitational field measurement, geophysical measurement, etc., can solve the problems of high manufacturing cost and failure to work, and achieve low cost, easy mass production, and high efficiency large-area marine gravity field The effect of surveying work

Active Publication Date: 2018-12-14
湖南省导航仪器工程研究中心有限公司
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  • Application Information

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Problems solved by technology

The marine gravimeter based on the three-axis platform inertial navigation is essentially a complete high-precision platform inertial navigation system. Compared with the marine gravimeter based on the two-axis stable platform, it has one more stable axis, which makes its manufacturing cost lower. High, and cannot work in a dynamic environment

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  • Strapdown underwater dynamic gravity measurement instrument
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  • Strapdown underwater dynamic gravity measurement instrument

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Embodiment Construction

[0017] The technical solution of the present invention will be clearly and completely described through examples below.

[0018] figure 1 It is a schematic diagram of composition, connection and layout of the present invention. The present invention is mainly composed of an inertial measurement unit 1, a data system 3, a Doppler velocimeter 4, a depth gauge 5, an ultra-short baseline underwater acoustic positioning device 6, and an underwater pressure chamber 8, and may also include a temperature control system 2, Among them, the data system 3 includes a time-synchronized data acquisition system 301 and a data processing computer 302, the inertial measurement unit 1 and the data system 3 are located inside the underwater pressure chamber 8, the Doppler velocimeter 4, the depth gauge 5, and the ultra-short baseline The underwater acoustic positioning equipment 6 is located outside the underwater pressurized cabin 8, and is connected to the data system 3 in the underwater press...

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Abstract

The invention relates to a strapdown underwater dynamic gravity measurement instrument and belongs to the field of gravity measurement. The system is mainly composed of an inertia measurement unit, adata system, a Doppler velocimeter, a depthometer, an ultrashort baseline hydroacoustic positioning device and an underwater pressure cabin, wherein installing holes are formed in the bottom of the underwater pressure cabin, and the underwater pressure cabin can be fixedly connected with an underwater dynamic carrier through bolts; the Doppler velocimeter measures the velocity to a seabed or a seacurrent, the depthometer measures the depth of a gravity meter, and the ultrashort baseline hydroacoustic positioning device measures the position of the gravity meter; and measurement results of themeters are used as external observation quantities, united filtering is performed on the measurement results and a strapdown inertial navigation solving result of the inertia measurement unit, and gravity anomaly solving is performed after all navigation parameters and specific force measurement values are obtained. The strapdown underwater dynamic gravity measurement instrument meets the demandof underwater dynamic gravity measurement and has the advantages of being low in manufacturing cost, high in measurement efficiency, large in covering area, adaptive to a dynamic measurement environment, close to a seabed gravity signal source and the like.

Description

Technical field: [0001] The invention relates to a gravity measuring device, in particular to a strapdown underwater dynamic gravity measuring instrument, which belongs to the field of gravity measurement. Background technique: [0002] The earth's gravitational field is one of the important basic physical characteristics of the earth, which restricts all physical events in the earth itself and its surrounding space. The determination of the earth's gravity field is of great significance to geodesy, space science, geophysics, geodynamics, marine science, resource exploration, and modern military affairs. At present, the main measurement methods of the earth's gravity field include ground gravity measurement, airborne gravity measurement, ocean gravity measurement and satellite gravity measurement. The ocean occupies 71% of the Earth's surface and is the main object of Earth's gravity measurement. At present, the commonly used marine gravity measurement methods are underwat...

Claims

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Application Information

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IPC IPC(8): G01V7/02
CPCG01V7/02
Inventor 吴美平蔡劭琨于瑞航曹聚亮潘国伟
Owner 湖南省导航仪器工程研究中心有限公司
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