Size-of-source Effect in Infrared Thermometers with Direct Reading of Temperature
Size-of-source Effect in Infrared Thermometers with Direct Reading of Temperature
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DOI：
10.1007/s10765-017-2237-3
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发表时间：
2017-07-01
影响因子：
2.2
通讯作者：
Saunders, P.
中科院分区：
文献类型：
--
作者：
Manoi, A.;Saunders, P.
本文测量了六种红外温度计的光源尺寸效应。在这项研究中使用了用于SSE测定的替代直接方法，其中孔径尺寸是固定的，测量距离是变化的。通常和替代的直接方法之间的实验等效性。研究了不同类型红外测温仪的SSE值。对于可聚焦、闭焦和开焦温度计，发现SSE的最大值分别高达5%、8%和28%。在275摄氏度时，28%的SSE对应于52摄氏度，表明对这种类型的红外温度计的准确性的严重影响。讨论了实现制造商所使用的校准条件的方法，包括孔径尺寸和测量距离，并通过实验结果进行了验证。这项研究将有利于用户选择最好的红外温度计，以配合他们的工作，并为校准实验室选择最适合的技术来确定SSE。
The size-of-source effect (SSE) for six infrared (IR) thermometers with direct reading of temperature was measured in this work. The alternative direct method for SSE determination, where the aperture size is fixed and the measurement distance is varied, was used in this study. The experimental equivalence between the usual and the alternative direct methods is presented. The magnitudes of the SSE for different types of IR thermometers were investigated. The maxima of the SSE were found to be up to 5 %, 8 %, and 28 % for focusable, closed-focus, and open-focus thermometers, respectively. At 275 degrees C, an SSE of 28 % corresponds to 52 degrees C, indicating the severe effect on the accuracy of this type of IR thermometer. A method to realize the calibration conditions used by the manufacturer, in terms of aperture size and measurement distance, is discussed and validated by experimental results. This study would be of benefit to users in choosing the best IR thermometer to match their work and for calibration laboratories in selecting the technique most suitable for determining the SSE.