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Vertical acceleration correction method for gravimeter carried by AUV

A technology of vertical acceleration and load force, applied in the direction of instruments, scientific instruments, measuring gravitational field, etc., can solve the problems of difficult to guarantee accuracy and large error, and achieve the effect of improving measurement accuracy

Pending Publication Date: 2020-09-29
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional vertical disturbance acceleration correction method uses digital filtering technology to determine the AUV vertical acceleration for vertical disturbance acceleration correction. This method has large errors and is difficult to guarantee accuracy.

Method used

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  • Vertical acceleration correction method for gravimeter carried by AUV
  • Vertical acceleration correction method for gravimeter carried by AUV
  • Vertical acceleration correction method for gravimeter carried by AUV

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] It should be understood that the terms "comprising" and "having" and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to Those steps or elements are not explicitly listed, bu...

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Abstract

The invention discloses a vertical acceleration correction method for a gravimeter carried by an AUV. The method comprises the following steps: eliminating high-frequency vertical disturbance acceleration of the gravimeter carried by the AUV by using low-pass filtering, inhibiting low-frequency vertical disturbance acceleration of the gravimeter carried by the AUV by using mean filtering, and correcting noise that the vertical disturbance acceleration of the gravimeter carried by the AUV coincides with gravity anomaly on a frequency spectrum by using game filtering. The method can solve the problems that additional acceleration is caused and the measurement precision is low due to the fact that the gravimeter swings due to factors such as vibration of itself, sea waves and ocean currents when the gravimeter carried by the AUV is used for ocean gravity measurement; the ocean gravity measurement precision can be improved, and the method has high dynamic response capacity and robustness to external interference.

Description

technical field [0001] The invention relates to the technical field of an acceleration correction method for a gravimeter, in particular to a vertical acceleration correction method for an AUV gravity meter. Background technique [0002] Autonomous underwater vehicles (AUV), such as conventional submarines, nuclear submarines, and underwater autonomous operating robots, have been widely used in marine oil and gas source exploration and national defense. To achieve long-term underwater operations, it must rely on an autonomous underwater navigation and positioning system. After modeling and real-time filtering, the original gravity anomaly signal collected by the relative gravimeter equipped on the AUV needs to be corrected to obtain the real-time gravity anomaly reflecting the position information of the AUV, and then matched with the stored gravity database to obtain the position information of the AUV , to assist the navigation system. [0003] When the AUV is sailing, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V13/00G01V7/00
CPCG01V13/00G01V7/00
Inventor 李超超刘伟铭张晓栋徐飞曾凯赵毛毛时小华吕志斌
Owner NINGXIA UNIVERSITY
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