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Gravity meter based on nonlinear superconductive magnetic spring

A magnetic spring and non-linear technology, applied in the field of gravity measuring instruments, can solve the problems of large displacement of the inspection mass and failure to work

Active Publication Date: 2018-09-07
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problem that the existing land-based superconducting gravimeter has too large inspection mass displacement in a dynamic environment and cannot work in a ship-borne environment

Method used

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  • Gravity meter based on nonlinear superconductive magnetic spring
  • Gravity meter based on nonlinear superconductive magnetic spring
  • Gravity meter based on nonlinear superconductive magnetic spring

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0024] In order to overcome the problem of excessive displacement of the inspection mass in a dynamic environment and enable the superconducting gravimeter to be applied to the gravity measurement of mobile platforms such as ships, the present invention proposes to use a superconducting magnetic spring vibrator with nonlinear stiffness to construct a superconducting gravity instrument method.

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Abstract

The invention discloses a gravity meter based on a nonlinear superconductive magnetic spring. The gravity meter comprises a superconductive magnetic spring oscillator and a displacement detecting unit. The superconductive magnetic spring oscillator comprises current-carrying coils and a testing mass body. The current-carrying coils and the testing mass body are each made of a superconductive body.The testing mass body is a cylinder with a middle partition plate. The current-carrying coils are arranged at the corresponding positions of the two ends of the middle partition plate respectively. The magnetic repulsion force between the current-carrying coils and the testing mass body balances the gravity of the testing mass body, and magnetic levitation is conducted on the testing mass body. The resultant force of the magnetic force borne by the testing mass body and the gravity of the testing mass body has the properties of resilience, the vertical superconductive magnetic spring oscillator is formed by the current-carrying coils and the testing mass body, and the magnetic repulsion force between the current-carrying coils and the testing mass body is in nonlinear relation with the distance between the current-carrying coils and the testing mass body; the displacement detecting unit is used for detecting the displacement of the testing mass body so as to detect the time-varying gravity acceleration of the gravity meter in the environment. The gravity meter can still normally work under the condition of large-amplitude platform vertical vibration.

Description

technical field [0001] The invention relates to the technical field of gravimetric measuring instruments, and more particularly, relates to a gravimeter based on a nonlinear superconducting magnetic spring. Background technique [0002] Mobile platform gravity measurement has the advantages of fast and efficient, and plays an important role in engineering applications such as marine resource exploration, gravity and inertial integrated navigation, and ballistic missile track correction. In some occasions that require long-term measurement, such as ocean gravity measurement, the zero drift of the instrument is an important factor affecting the measurement accuracy. [0003] As a relative gravity measuring instrument, the superconducting gravimeter has excellent stability. For example, the annual drift rate of land-based superconducting gravimeters is on the order of μGal; it is far lower than that of currently used marine gravimeters, whose monthly drift rate is higher than ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V7/00
CPCG01V7/00
Inventor 刘向东
Owner HUAZHONG UNIV OF SCI & TECH
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