摘要
介绍两类自由下落式重力梯度测量方法:激光干涉法和原子干涉法,分析对比后发现虽然两种干涉的测量方法不同,但具有相同的潜在精度。通过笔者的自由下落重力梯度测量的初步实验,提出了两种激光重力梯度仪的设计思路,并对其进行了分析和对比。结果表明,双干涉测量法在实现重力梯度仪精度要求的前提下,可以不增大整套设备的体积,并较好地保持双落体自由下落环境条件及运动状态的一致性。
Two kinds of gravity gradiometer are described in this paper： one is laser interferometer and the other is atom interferometer.The authors have found that free fall gradiometery offers much promise for dynamic measurements and the free fall system can either use macroscopic objects in free-fall（mirrors） or atomic fountains.The two systems have similar intrinsic sensitivities.Based on the initial gravity gradient measuring experiment with NIM-Ⅱ,the authors put forward two ideas to design the gravity gradiometer： Single-Interferometer and Dual-Interferometer.The authors favor the second one in that it can satisfy the precision requirement at the same size as the traditional absolute gradiometer.
出处
《物探与化探》
CAS
CSCD
北大核心
2011年第2期230-233,共4页
Geophysical and Geochemical Exploration
基金
中国地震局2010年重点科研业务费重点专项(DQJB01A02)
关键词
重力梯度仪
资源探测
激光干涉
gravity gradiometer
resource exploration
laser interferometer
