20 May 2009 Study on a reference detection of infrared thermograph with high precision
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Abstract
The surface of any object can radiate thermal infrared rays, and this is the basis of measuring object's temperature by thermal infrared imager is. As thermal rays are affected by dielectric absorption and measurement distance change along radiated path, detection precision of infrared thermograph temperature is not high. If a black body is put beside the measured object, and its optical path is the same as that of measured object, thus, the black body can be seen as an infrared reference emitter. Actual temperature of black body can be measured with high precision by Pt thermal resistance, then, precise reference temperature beside measured object can be obtained. Besides, real time detection of both measured object and black body temperature can be obtained by thermal infrared device, and these detected temperatures can be corrected and processed based on the black body temperature obtained by Pt thermal resistance, thus, detection error and uncertainty created by dielectric absorption and distance of infrared ray path can be eliminated. This method can measure surface temperature of dynamic object with high precision.
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Yuan Xu, Maoyong Cao, Kebao Xu, "Study on a reference detection of infrared thermograph with high precision", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72832X (20 May 2009); doi: 10.1117/12.828735; https://doi.org/10.1117/12.828735
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