空气密度对高等级砝码量值传递工作的影响研究  

Study on the influence of air density on mass quantity value transfer

作　　者：尚贤平[1] 费利萍[1] 余松青 毛晓辉[1] 韩炜虹 赵群[1] 

机构地区：[1]浙江省计量科学研究院,邮政编码310018

出　　处：《衡器》2015年第11期6-8,26,共4页Weighing Instrument

摘　　要：高等级砝码在量值传递过程中,由于受到空气浮力的因素,对砝码的折算质量值造成影响,为了尽可能减少空气浮力对其的影响,需要对空气密度进行测量计算和修正,潮湿空气密度跟空气的压力、温度、湿度、空气中二氧化碳含量密切相关,精确测量潮湿空气中的温湿度、气压、二氧化碳含量是测定空气密度的基础,本文利用空气密度测量装置对实验室的空气密度进行连续测量,获得实验室条件下的空气密度变化情况,并从空气密度的变化情况定量分析研究高等级砝码质量值在传递过程中的影响值并加以修正,减少测量不确定度的影响,提高高等级砝码在量值传递过程的测量准确度。Accurate measurement of weight mass, the effect of buoyancy correction in air caused to be taken into account. Air density is closely related with the pressure of the air; temperature, humidity, carbon dioxide conten Accurate measurement of air temperature, humidity, barometric pressur and carbon dioxide is the basis of air density determination. This paper proposes a method to measure weight mass precisely. It use air density measurement device for continuous measurement of the air density, the air density obtained for different time periods under laboratory conditions. According to changes in air density, quantitative analysis counterbalance mass values affect the value in the transfer process and being modified. At last reduce the impact of measurement uncertainty and improve the measurement accuracy weights.

关 键 词：计量学 量值传递 空气密度 砝码 

分 类 号：TH715.11[机械工程—测试计量技术及仪器]