国产绝对重力仪与FG5绝对重力仪比对实验

Contrast test of domestic absolute gravimeter with FG5

针对国产绝对重力仪样机在高强度连续工作条件下的稳定性、观测精度、系统偏差、野外适应性、使用的便捷性等问题,该文选取西安、平凉、威武、哈密、乌鲁木齐、北京6处距离跨度较大的重力基准点位,对国产绝对重力仪与FG5绝对重力仪进行同址同期的比对观测实验。结果表明:国产绝对重力仪的整体工作性能良好,但是其成果精度低于FG5,且在外界噪声较小的情况下,两者测量成果一致性较好;反之,两者测量成果差异较大。分析认为国产绝对重力仪的隔振系统性能低于FG5,表明国产绝对重力仪抗干扰能力有待进一步优化,从而为绝对重力仪的国产化提供改进依据。

In order to detect the comprehensive performance of domestic absolute gravimeter,such as the stability under high strength continuous working conditions,observation accuracy,systematic deviation,field adaptability,convenience.This paper introduced the comparison of the domestic absolute gravimeter and FG5,by selecting six gravity reference points with large distance at Xi’an,Pingliang,Weiwu,Hami,Wulumuqi and Beijing in the same period and point,the results showed that the overall performance of the domestic absolute gravimeter was good,but the accuracy of the results was lower than that of FG5;besides,the measured data of domestic absolute gravimeter and FG5 was good with less noise.On the contrary,the measured data of domestic absolute gravimeter and FG5 have large deviation.The analysis showed that the vibration isolation system of the domestic absolute gravimeter was lower than FG5,indicating that the anti-interference ability of the domestic absolute gravimeter needed to be further optimized,thus providing an improved basis for the localization of the absolute gravimeter.