航空重力梯度仪实时重力梯度解调方法  

A real-time gravity gradient demodulation method for airborne gravity gradiometers

作　　者：钱学武[1,2] 赵立业 尹航[3] QIAN Xue-Wu;ZHAO Li-Ye;YIN Hang(School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China;School of Electronic Engineering,Jinan Vocational College,Jinan 250103,China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China)

机构地区：[1]东南大学仪器科学与工程学院,江苏南京210096 [2]济南职业学院电子工程学院,济南250103 [3]中国自然资源航空物探遥感中心,北京100083

出　　处：《物探与化探》2022年第6期1507-1511,共5页Geophysical and Geochemical Exploration

基　　金：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)。

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。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.

关 键 词：重力梯度仪 解调相位角 梯度解调 半物理仿真 

分 类 号：P631[天文地球—地质矿产勘探]