【摘要】 本文介绍了一种自主研发的新型高精度绝对重力仪样机,它利用激光干涉原理测量落体自由下落时相对于参考棱镜的时间位移信息,通过振动误差补偿算法提取落体下落轨迹上的时间位移坐标,然后基于最小二乘拟合法计算测点的重力加速度.在白家疃国家地球物理观象台国家重力基准点进行的对比观测试验结果与误差分析确定,样机经误差修正后的系统偏差为(-27.46～-30.59)±3.06×10-8 ms-2,2小时测量精度优于10×10-8 ms-2.更多还原

【Abstract】 The free-fall absolute gravimeter which developed by ourselves are reported in this paper.The determination of the acceleration due to gravity is done interferometrically by getting the information of time and distance in trajectory of the falling-body and designing the algorithm of vibration error compensation.A detailed uncertainty budget is given for the experimental prototype from the experiment at the international absolute gravity reference point,in Beijing national geophysics observatory.The combined standard uncertainty and precision in 2 hours are estimated at(-27.46~-30.59)±3.06×10-8ms-2 and 10×10-8ms-2,respectively.更多还原