基于高精度原子干涉仪的动态重力仪测量：消除交叉耦合效应

High-Precision Atom Interferometer-Based Dynamic Gravimeter Measurement by Eliminating the Cross-Coupling Effect.

作者信息

Zhou Yang, Wang Wenzhang, Ge Guiguo, Li Jinting, Zhang Danfang, He Meng, Tang Biao, Zhong Jiaqi, Zhou Lin, Li Runbing, Mao Ning, Che Hao, Qian Leiyuan, Li Yang, Qin Fangjun, Fang Jie, Chen Xi, Wang Jin, Zhan Mingsheng

机构信息

Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China.

University of Chinese Academy of Sciences, Beijing 100049, China.

出版信息

Sensors (Basel). 2024 Feb 4;24(3):1016. doi: 10.3390/s24031016.

DOI:10.3390/s24031016

PMID:38339733

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10857408/

Abstract

A dynamic gravimeter with an atomic interferometer (AI) can perform absolute gravity measurements with high precision. AI-based dynamic gravity measurement is a type of joint measurement that uses an AI sensor and a classical accelerometer. The coupling of the two sensors may degrade the measurement precision. In this study, we analyzed the cross-coupling effect and introduced a recovery vector to suppress this effect. We improved the phase noise of the interference fringe by a factor of 1.9 by performing marine gravity measurements using an AI-based gravimeter and optimizing the recovery vector. Marine gravity measurements were performed, and high gravity measurement precision was achieved. The external and inner coincidence accuracies of the gravity measurement were ±0.42 mGal and ±0.46 mGal after optimizing the cross-coupling effect, which was improved by factors of 4.18 and 4.21 compared to the cases without optimization.

摘要

带有原子干涉仪（AI）的动态重力仪能够高精度地进行绝对重力测量。基于AI的动态重力测量是一种联合测量，它使用AI传感器和传统加速度计。两个传感器的耦合可能会降低测量精度。在本研究中，我们分析了交叉耦合效应，并引入了一个恢复向量来抑制这种效应。通过使用基于AI的重力仪进行海洋重力测量并优化恢复向量，我们将干涉条纹的相位噪声提高了1.9倍。进行了海洋重力测量，并实现了高重力测量精度。优化交叉耦合效应后，重力测量的外部和内部符合精度分别为±0.42 mGal和±0.46 mGal，与未优化的情况相比，分别提高了4.18倍和4.21倍。