环境物体对全张量重力梯度仪的影响  

The influence of an ambient object to the full tensor gravity gradiometer

作　　者：李海兵[1] 蔡体菁[1] 

机构地区：[1]东南大学仪器科学与工程学院,江苏南京210096

出　　处：《传感器与微系统》2010年第4期55-57,61,共4页Transducer and Microsystem Technologies

基　　金：国家"863"计划资助项目(2006AA12Z302)

摘　　要：在重力梯度测量过程中,由于重力梯度测量仪器周围可能有物体存在,由此产生引力梯度,这种变化可以直接被重力梯度仪所敏感。以概念中的十二加速度计组成的全张量重力梯度仪为例,根据万有引力定律,得到梯度仪敏感引力梯度计算的理论逼近公式。使用Matlab软件根据物体处于不同位置时进行仿真,得到了重力梯度仪敏感的9个梯度张量值。通过对仿真结果分析可知,物体距离重力梯度仪中心位置越远,环境物体对梯度仪的影响越小。最后给出了减小这种影响的措施。In the process of measuring gravity gradient, the ambient object near the gravity gradiometer would lead to gravitational gradient change ,which can be sensed by gravity gradiometer. Take the 12-accelerometers full tensor gradient gradiometer in concept for example, and according to the law of gravitation, the theoretical formulation for calculating the gravitational gradient is obtained. Using the simulation tool, Matlab, gravitational gradient induced by an ambient object in different positions were simulated. Nine gradient tensor values sensed by gravity gradiometer were calculated. By analyzing the results, it was known that the farer the distance of objects from gravity gradiometer,the little influence the objects on gradiometer. Methods that can reduce the influence were given.

关 键 词：全张量重力梯度仪 加速度计 引力梯度 等效原理 

分 类 号：U666.1[交通运输工程—船舶及航道工程]