中国物理B ›› 2016, Vol. 25 ›› Issue (8): 80401-080401.doi: 10.1088/1674-1056/25/8/080401
Jie Luo(罗 杰), Wen-Ze Zhan(占文泽), Wei-Huang Wu(巫伟皇), Cheng-Gang Shao(邵成刚), Dian-Hong Wang(王典洪)
Jie Luo(罗 杰)1, Wen-Ze Zhan(占文泽)1, Wei-Huang Wu(巫伟皇)1, Cheng-Gang Shao(邵成刚)2, Dian-Hong Wang(王典洪)1
摘要:
Based on statistical properties, two typical models are considered to calculate the uncertainties for some random noise sequences on the period extraction of a torsion pendulum, which is important and instructive in the measurement of gravitational constant G with the time-of-swing method. An expression of the uncertainty for the period measurement is obtained, which is dependent on the ratio Δt/(1/λ) where Δt is the interval of the sample time and 1/λ is the length of the correlation time. The result of processing experimental data shows that as the interval of the sample time Δt gradually shortens, the uncertainty of the period becomes smaller, and further when the ratio Δt/(1/λ) is less than 1, the uncertainty remains substantially unchanged.
中图分类号: (Experimental tests of gravitational theories)