一种用于测量重力梯度的扭秤装置

A Torsion Balance Device for Measuring the Gravity Gradient

基于扭秤测量重力梯度的原理,设计一款扭秤重力梯度仪,该仪器由扭秤系统、角度测量系统、振幅衰减系统、转台、真空容器5部分构成。针对扭秤悬挂系统稳定的时间过长,极大地影响了重力梯度的测量效率的问题,采用PID控制技术,设计了振幅衰减系统。仿真结果表明:曲率及水平重力梯度的测量精度可达0.5E(1E=1×10^(-9)m/s^2),测量一组重力梯度的极限效率优于1 h。

Based on the principle of torsion balance measuring gravity gradient , a torsion balance gravity gradiometer was designed, which consists of a torsion balance system, an angle measurement system, an amplitude attenuation system, a turntable system, a vacuum container system. Considering the stable time of torsion balance suspension system was too long, which had great impacted the efficiency of the gravity gradient measurement, an amplitude attenuation system was designed in combination with PID control technology.Simulation results show that, the curvature and horizontal gravity gradient could be measured, the accuracy was as high as 0.5 E（1E=1×10^-9m/s^2）, and the limit efficiency of measuring a group of gravity gradients was better than an hour.