Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)
- Volume 10 Issue 6
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- Pages.795-802
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- 1998
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- 1229-6422(pISSN)
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- 2465-7611(eISSN)
Effects of the in-process calibration from IR detector for thermal diffusivity measurement by laser flash method
레이저 섬광법에 의한 열확산계수 측정시 적외검출소자에서 실시간 온도보정이 미치는 영향
Abstract
For measuring the thermal diffusivity by laser flash method, raw data have to be calibrated using temperature data. We have developed in-process calibration method and polynomial calibration in which thermal diffusivity can be calibrated during measuring, This method is different from existing temperature pre-process calibration method and exponential calibration having various source of error. Using this new calibration method, measurement accuracy was improved about 1∼2% compare to the value by the existing method. We also studied more accurate fitting curve as in Figure 4 was shown the result of measuring output characteristics of IR radiometer with temperature. As illustrated in data, in-process calibration method and polynomial calibration equation is proper than pre-process calibration method and exponential calibration.
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