航空重力梯度仪实时重力梯度解调方法

doi:10.11720/wtyht.2022.0002

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摘要

为了进一步提高重力梯度测量精度,提出了一种实时解调相位角补偿和重力梯度实时处理方法。首先根据重力梯度仪样机结构特性给出了重力梯度解调相位角的求解过程和求解算式,然后研究了实时重力梯度解调方法并给出了重力梯度解调算式,最后在重力梯度信号半物理仿真平台上进行了仿真实验测试。测试结果表明,所提方法可以明显提高重力梯度测量精度,具有较高的工程应用价值,可以为航空重力梯度仪的研制提供技术参考。

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	钱学武
	赵立业
	尹航

关键词 ：重力梯度仪, 解调相位角, 梯度解调, 半物理仿真

Abstract：

To further improve the precision of gravity gradient measurement, this study proposed a method for real-time phase angle compensation of gravity gradient demodulation and real-time processing of gravity gradients. Firstly, this study determined the process and formula used to determine the phase angles for gravity gradient demodulation based on the structural features of the gravity gradiometer prototype. Then, it investigated the method for real-time gravity gradient demodulation and determined the formula. Finally, this study carried out simulation experiments using the hardware-in-the-loop simulation platform of gravity gradient signals. The simulation results show that the method proposed in this study can significantly improve the precision of gravity gradient measurement and can be applied to engineering. Therefore, this study can provide technical references for the development of airborne gravity gradiometers.

Key words： gravity gradiometer demodulation phase angle gradient demodulation hardware-in-the-loop simulation

收稿日期: 2022-01-05 修回日期: 2022-04-01 出版日期: 2022-12-20

ZTFLH:

P631

基金资助:中国博士后科学基金项目“动基座航空重力梯度仪数据处理与误差补偿技术研究”(2020M671287);江苏省博士后科研资助计划项目“航空重力梯度测量误差补偿与数据处理方法研究”(2020Z387);山东省自然科学基金面上项目“高精度航空重力梯度误差补偿与数据处理技术研究”(ZR2020MF089)

通讯作者: 赵立业

作者简介: 钱学武(1981-),男,博士后,副教授,主要从事精密仪器研究工作。Email:sdqxwu@163.com

引用本文:

钱学武, 赵立业, 尹航. 航空重力梯度仪实时重力梯度解调方法[J]. 物探与化探, 2022, 46(6): 1507-1511.
QIAN Xue-Wu, ZHAO Li-Ye, YIN Hang. A real-time gravity gradient demodulation method for airborne gravity gradiometers. Geophysical and Geochemical Exploration, 2022, 46(6): 1507-1511.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2022.0002 或 https://www.wutanyuhuatan.com/CN/Y2022/V46/I6/1507

Fig.1 旋转加速度计重力梯度仪测量原理

Fig.2 重力梯度解调相位角结构

Fig.3 航空重力梯度仪实时重力梯度解调结构

Fig.4 重力梯度仪半物理仿真系统实物

Fig.5 重力梯度解调相位角在零相位滤波前后比较波形

Fig.6 相位补偿前后的梯度信息(Г_yy-Г_xx)比较的波形

Fig.7 相位补偿前后的梯度信息Г_xy比较的波形

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