旋转式重力梯度测量系统试验及数据处理

旋转式重力梯度测量系统采用旋转调制方式求取重力梯度信息。首先,从旋转加速度计的基本原理出发,给出了重力梯度测量系统的主要工作模式;其次,构建了旋转加速度计重力梯度测量系统组成和主要功能模块,提出了采用引力产生装置开展实验室引力梯度测量的试验方案;最后,给出了旋转加速度计重力梯度测量系统的静态梯度试验验证基本条件、试验设备,并开展了重力梯度测量试验。试验结果表明,旋转式重力梯度测量系统在实验室条件下完成引力梯度试验,该系统可以检测优于200 Eu(1 Eu=10~(-9)/s~2)的引力梯度,该系统开展的试验验证为动态重力梯度仪的研制奠定了基础。

Experiment and data processing for rotating gravity gradient measurement system

This rotating gravity gradient measurement system adopts a rotating modulation mode to measure the gravity gradient tensor.First,the operation mode of the gravity gradient measurement system is presented according to the operation principal of the rotating accelerometer gravity gradiometer.Then,the gravity gradient measurement system,its main subsystems and their main functions are introduced,and the gravity gradient test scheme is proposed,which uses gravitation generating device to carry out laboratory gravitation gradient measurement.Finally,its test algorithm is derived,and the static gravitation gradient test experiment devices and conditions in laboratory are given.The gravitation gradient tests are conducted,which show that the detection accuracy of the proposed system is better than 200 Eu (1 Eu=10-9/s2).The experiment verifica-tion by the proposed system lays a foundation for the development of the dynamic gravity gradiometer.