Comparison between matrix method, equation method and full air-buoyancy correction method for dissemination of microgram weights

Over the past 9 years since 2007, there has been growing interest in the field of small weight measurement, like determination of sensitivity property of microbalance. This drives the requirement for more accurate small weight measurement down to microgram level. NMIs researched on the microgram fro...

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Bibliographic Details
Published in:International journal of precision engineering and manufacturing 2017-09, Vol.18 (9), p.1213-1220
Main Authors: Ren, Xiao-Ping, Wang, Jian, Cai, Chang-Qing, Su, Shuang
Format: Article
Language:English
Subjects:
Buoyancy
Engineering
Industrial and Production Engineering
Materials Science
Regular Paper
Uncertainty
Weight measurement
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Summary:Over the past 9 years since 2007, there has been growing interest in the field of small weight measurement, like determination of sensitivity property of microbalance. This drives the requirement for more accurate small weight measurement down to microgram level. NMIs researched on the microgram from manufacture, material and shape, storage and holding method, measurement equipment and weighing scheme. Subdivision comparison is commonly adopted and matrix method (MM) is used to solve the measurement Eq.. In this paper, the density of test and standard weight rather than the volume were adopted in MM. Details on how to use this method based on Matlab software were presented. Then the comparison between MM, Eqution method (EM) and full air-buoyancy correction method (FACM) were made. Differences between these three methods were analyzed and evaluation results were given out. Experiment showed that EM and FACM were of the same relative uncertainty, but MM had lower measurement uncertainty than EM and FACM.
ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-017-0142-0