title: An improved correlation method for determining the period of a torsion pendulum.
abstract: Considering variation of environment temperature and unhomogeneity of background gravitational field, an improved correlation method was proposed to determine the variational period of a torsion pendulum with high precision. The result of processing experimental data shows that the uncertainty of determining the period with this method has been improved about twofolds than traditional correlation method, which is significant for the determination of gravitational constant with time-of-swing method.
authors.affiliation: Faculty of Mechanical and Electronic Information, China University of Geosciences, Wuhan 430074, People's Republic of China. luojiethanks@126.com
authors.forename: Jie
authors.initials: J
authors.lastname: Luo
authors.forename: Dian-Hong
authors.initials: DH
authors.lastname: Wang