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

doi:10.3969/j.issn.1000-1158.2021.08.04

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Abstract 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.

Key words： metrology scale division method photoelectric pyrometer single-fixed-point extrapolation multi-fixed-point interpolation high temperature fixed point uncertainty

Received: 13 April 2020 Published: 20 August 2021

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TB942

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	LIU Xiao-ying
	LIU Ju-fen
	WANG Jing-hui
	LU Xiao-feng

Cite this article:

LIU Xiao-ying,LIU Ju-fen,WANG Jing-hui, et al. Comparison of Scale Division Methods between Single-fixed-point Extrapolation and Multi-fixed-point Interpolation for 0.9μm Pyrometers[J]. Acta Metrologica Sinica, 2021, 42(8): 1000-1005.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2021.08.04 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2021/V42/I8/1000

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