海洋环境监测站盐度传感器的现场校准和不确定度评定
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摘要
文章依据相关国家标准,结合海洋环境监测站的实际工作需求,针对环境自动观测系统的盐度传感器,提出新的现场校准方法,即直接比较法;根据不确定度来源,分别计算由测量重复性、盐度标准器、测量环境、测量人员和恒温水槽引入的不确定度分量并合成标准不确定度,据此计算扩展不确定度和合成标准不确定度的有效自由度,由此得出盐度传感器现场校准测量结果的不确定度为0.17。本研究提出的盐度传感器现场校准方法更契合海水盐度的变化规律,可实现盐度分量的量值溯源,具有准确度高和溯源途径清晰的特点;不确定度评定方法科学合理,且具有一定的推广价值。
According to the relevant national standards and the actual work requirements of the marine environmental monitoring station,a new field calibration method was proposed for the salinity sensors of the environmental automatic observation system,which was named direct comparison method.Based on the sources of uncertainty,the component of uncertainty introduced by measurement repeatability,salinity standard apparatus,measuring environment,surveyors and constant temperature water tank was calculated respectively.Then the standard uncertainty was synthesized finally.According to it,the effective degree of freedom of the expansion uncertainty and the uncertainty of the synthetic standard were explicit.Thus,the uncertainty of the calibration measurement results of the salinity sensor was 0.17.The field calibration method of salinity sensor proposed in this study was more suitable for the changing law of seawater salinity,which could be traced to the source of salinity components,and it had the characteristics of high accuracy and clear tracing way.The evaluation method of uncertainty was scientific and reasonable.
According to the relevant national standards and the actual work requirements of the marine environmental monitoring station,a new field calibration method was proposed for the salinity sensors of the environmental automatic observation system,which was named direct comparison method.Based on the sources of uncertainty,the component of uncertainty introduced by measurement repeatability,salinity standard apparatus,measuring environment,surveyors and constant temperature water tank was calculated respectively.Then the standard uncertainty was synthesized finally.According to it,the effective degree of freedom of the expansion uncertainty and the uncertainty of the synthetic standard were explicit.Thus,the uncertainty of the calibration measurement results of the salinity sensor was 0.17.The field calibration method of salinity sensor proposed in this study was more suitable for the changing law of seawater salinity,which could be traced to the source of salinity components,and it had the characteristics of high accuracy and clear tracing way.The evaluation method of uncertainty was scientific and reasonable.
引文
[1]国家质量监督检验检疫总局.温盐深测量仪计量检定规程:JJG 763-2002[S].北京:标准出版社,2002.
[2]国家技术监督局.电极式盐度计检定规程:JJG 761-1991[S].北京:标准出版社,1991.
[3]国家质量监督检验检疫总局.测量不确定度评定与表示:JJF1059.1-2012[S].北京:标准出版社,2012.
[4]中国计量测试学会.一级注册计量师基础知识及专业实务[M].北京:中国质检出版社,2013.
[2]国家技术监督局.电极式盐度计检定规程:JJG 761-1991[S].北京:标准出版社,1991.
[3]国家质量监督检验检疫总局.测量不确定度评定与表示:JJF1059.1-2012[S].北京:标准出版社,2012.
[4]中国计量测试学会.一级注册计量师基础知识及专业实务[M].北京:中国质检出版社,2013.