Research on volume determination of mass standards with two acoustic measuring chambers

Authors

  • Manhong Hu National Institute of Metrology, P.R. China
  • Jian Wang National Institute of Metrology, P.R. China
  • Yue Zhang National Institute of Metrology, P.R. China
  • Chang Qing Cai National Institute of Metrology, P.R. China
  • Rui Lin Zhong National Institute of Metrology, P.R. China
  • Jing An Ding National Institute of Metrology, P.R. China
  • Xiao Ping Ren National Institute of Metrology, P.R. China

DOI:

https://doi.org/10.21014/acta_imeko.v6i2.337

Abstract

The acoustic volume measuring method is a promising non-contact method for volume determination of mass weights. To improve the measuring accuracy of volume determination with the non-contact acoustic method, an acoustic measuring system with two measuring chambers is newly designed to compensate for the non-linearity measuring errors. When reducing the remaining air in the measuring chamber, the measuring accuracy can be greatly reduced. The volumes of mass standards ranging from 100 g to 5 kg are tested to evaluate the non-linearity errors of the volume measurement. The relative uncertainties of the acoustic volume determination are below 7.0 ×10-4 (k=2).

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Published

2017-07-21

Issue

Vol. 6 No. 2 (2017)

Section

Research Papers

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