光学干涉式绝对重力仪参考测试高度研究
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摘要
针对光学干涉式绝对重力仪数据处理过程中测试点重力梯度未知的情况,提出了参考测试高度的计算方法。分别对等时间和等距离数据进行详细的理论推导和仿真验证。仿真结果显示:参考测试高度计算误差小于1 mm,优于现有计算方法,结果精确有效,能应用于光学干涉式绝对重力测试领域。
A method is put forward to calculate the reference measurement height,aiming at the case that optical interferometric absolute gravimeter in process of data processing on the condition that gravity gradient of tested point is unknown. Theoretical derivation and simulation verifiction are taken for data equitime and equidistance,respectively. It is verified that the computation error of reference test height is less than 1 mm,which is better than that of the existing calculation methods and the result is precise and effective,it can be widely applied in the field of absolute gravity measurement using optical interferometric absolute gravimeter.
A method is put forward to calculate the reference measurement height,aiming at the case that optical interferometric absolute gravimeter in process of data processing on the condition that gravity gradient of tested point is unknown. Theoretical derivation and simulation verifiction are taken for data equitime and equidistance,respectively. It is verified that the computation error of reference test height is less than 1 mm,which is better than that of the existing calculation methods and the result is precise and effective,it can be widely applied in the field of absolute gravity measurement using optical interferometric absolute gravimeter.
引文
[1] NIEBAUER T M,SASAGAWA G S,FALLER J E,et al. A new generation of absolute gravimeters[J]. Metrologia,2005,32(3):159-180.
[2] ROTHLEITNER C,SVITLOV S,MERIMECHE H,et al.Development of new free-fall absolute gravimeters[J]. Metrologia,2009,46(3):283-297.
[3] SVITLOV S,MASLYK P,ROTHLEITNER C,et al. Comparison of three digital fringe signal processing methods in a ballistic freefall absolute gravimeter[J]. Metrologia,2010,47(6):677-689.
[4] AGOSTINO G D,GEMARK A,DESOGUS S,et al. A method to estimate the time position coordinates of a free-falling test-mass in absolute gravimetry[J]. Metrologia,2005,42(4):233-238.
[5] SVITLOV S,ROTHLEITNER C,WANG L J. Accuracy assessment of the two-sample zero-crossing detection in a sinusoidal signal[J]. Metrologia,2012,40(4):413-424.
[6] ZUMBERGE M A,RINKER R L,FALLER J E. A portable apparatus for absolute measurements of the earth’s gravity[J].Metrologia,1982,18(3):145-152.
[7] NIEBAUER T M. The effective measurement height of free-fall absolute gravimeters[J]. Metrologia,1989,26(2):115-118.
[8] TSUBOKAWA T,SVITLOV S. New method of digital fringe signal processing in an absolute gravimeter[J]. IEEE Transactions on Instrumentation&Measurement,1999,48(2):488-491.
[2] ROTHLEITNER C,SVITLOV S,MERIMECHE H,et al.Development of new free-fall absolute gravimeters[J]. Metrologia,2009,46(3):283-297.
[3] SVITLOV S,MASLYK P,ROTHLEITNER C,et al. Comparison of three digital fringe signal processing methods in a ballistic freefall absolute gravimeter[J]. Metrologia,2010,47(6):677-689.
[4] AGOSTINO G D,GEMARK A,DESOGUS S,et al. A method to estimate the time position coordinates of a free-falling test-mass in absolute gravimetry[J]. Metrologia,2005,42(4):233-238.
[5] SVITLOV S,ROTHLEITNER C,WANG L J. Accuracy assessment of the two-sample zero-crossing detection in a sinusoidal signal[J]. Metrologia,2012,40(4):413-424.
[6] ZUMBERGE M A,RINKER R L,FALLER J E. A portable apparatus for absolute measurements of the earth’s gravity[J].Metrologia,1982,18(3):145-152.
[7] NIEBAUER T M. The effective measurement height of free-fall absolute gravimeters[J]. Metrologia,1989,26(2):115-118.
[8] TSUBOKAWA T,SVITLOV S. New method of digital fringe signal processing in an absolute gravimeter[J]. IEEE Transactions on Instrumentation&Measurement,1999,48(2):488-491.