0.9μm光电高温计应用单固定点延伸和多固定点内插的分度方法比较  

Comparison of Scale Division Methods between Single-fixed-point Extrapolation and Multi-fixed-point Interpolation for 0.9 μm Pyrometers

作　　者：刘晓英 刘巨芬 王景辉[1] 卢小丰[1] LIU Xiao-ying;LIU Ju-fen;WANG Jing-hui;LU Xiao-feng(Heat Division,National Institute of Metrology,Beijing 100029,China;School of Information and Communication Engineering,North University of China,Taiyuan,Shanxi 030051,China)

机构地区：[1]中国计量科学研究院热工所,北京100029 [2]中北大学信息与通信工程学院,山西太原030051

出　　处：《计量学报》2021年第8期1000-1005,共6页Acta Metrologica Sinica

基　　金：国家质量基础的共性技术研究与应用专项(2017YFF0205902)。

摘　　要：单固定点延伸和多固定点内插是光电高温计的两种常用分度方法。针对新研制的0.9μm光电高温计进行了这两种分度方法的比较研究。在500~1800℃测温范围内,利用高温黑体炉作比较源,在整百度点与标准光电高温计进行量值验证,结果表明这两种分度方法的温度示值一致性优于0.2℃,与标准值的误差最大不超过0.6℃。两种分度方法的不确定度分别评估为0.2~1.3℃和0.2~0.8℃,k=2。相对于必须测量高温计光谱响应度及其响应度非线性的单固定点延伸方法,多固定点内插法简单并易操作,且不确定度可保持较优水平。该方法无论作为光电高温计的出厂分度还是周期示值校准,均可为大多数温度校准实验室提供参考。Scale division methods for single fixed-point extrapolation and multiple fixed-point interpolation are two commonly used calibration methods for standard photoelectric pyrometers.A comparative study of two methods was carried out for a newly developed 0.9μm photoelectric pyrometer.In the temperature measurement range of 500~1800℃,the high-temperature blackbody furnace was used as a comparison source to verify the value at the hundreds of temperature points against a standard photoelectric pyrometer.The results show that the consistency of the temperature values of the two methods is better than 0.2℃,and the maximum error away the standard value is not more than 0.6℃.The calibration uncertainty of the two methods is evaluated as 0.2~1.3℃and 0.2~0.8℃,respectively,k=2.The single fixed point extrapolation method must measure the pyrometer spectral responsivity and non-linearity.The multiple fixed-point interpolation method is simple and easy to operate,and the uncertainty can be kept at a high level.The multi-fixed-point interpolation method can be universally used for most temperature calibration laboratories,whether it is for the manufacture or the periodic calibration.

关 键 词：计量学 分度法 光电高温计 单固定点延伸 多固定点内插 高温固定点 不确定度 

分 类 号：TB942[一般工业技术—计量学]