【摘要】 中国第二代可移激光绝对重力仪（NIM-Ⅱ型）的实验装置于1985年研制成功。本文详细论述了仪器的多位置法原理及仪器结构;具体分析说明了仪器的光学系统,电子精密测时系统,数据处理系统;研究了一种处理地面微震干扰的新方法。参加1985年在法国巴黎举行的第二次国际绝对重力仪比对结果表明,该装置的测量结果不确定度为1.4x10^-7m/s²。国际比对后,仪器又做了进一步改进。经国内大面积测量应用的结果表明,该装置的不确定度可达1×10^-7m/s²。更多还原

【Abstract】 A model of the second generation Transportable laser interferometry absolute gravimeter has been developed in 1985 in China. This apparatus employs the simple free fall of a cube-corner prism. "g" is calculated in accordance with "multiple station" method. This paper describes the optical system for determining falling distance of the dropped object, the precies high-speed electronic counting system and an automatic data processing system. In order to reduce the effect of background disturbances we have developed a new method of data processing. We participated with the gravimeter NIM-Ⅱ in the Second International Absolute Gra-vimeter Comparsion at Severs At in 1985. The result of an international intercomparison of this absolute gaviments shows good agreement with the other instruments. After the second international intercomparison the gravimeter NIM-Ⅱ has been improved. The accuracy achieved is 1×10-7m/s2.更多还原