李氏比重瓶校准方法的探讨及测量不确定度分析

Discussion on Pycnometers'Calibration Method and Evaluation of Uncertainty of Measurement

李氏比重瓶在工程上应用广泛,随着科技的发展,粉体比重测定过程中对李氏比重瓶的容量示值的准确度要求越来越高,因此试验前对李氏比重瓶进行校正变得十分必要。本文基于衡量法,对李氏比重瓶的校准方法进行研究探讨,并通过建立测量模型,进行了不确定度分析。

Pycnometer have been widely used in engineering.W ith the development of science and technology,the requirements of the accuracy of quantity of pycnometers'capacity have become more and more important,in the de-termination of specific gravity of powders.So,it has been very necessary to calibrate pycnometer before experi-ment.This paper was based on the measurement method,to study the calibration method of pycnometer,and by building the mathematical model to evaluate the uncertainty of measurement.