Direct comparison of two pyrometers and a low-cost thermographic camera for time resolved LWIR temperature measurements

Rainer Krankenhagen; Simon J. Altenburg

doi:10.1117/12.2261074

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5 May 2017 Direct comparison of two pyrometers and a low-cost thermographic camera for time resolved LWIR temperature measurements

Rainer Krankenhagen, Simon J. Altenburg

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Proceedings Volume 10214, Thermosense: Thermal Infrared Applications XXXIX; 1021414 (2017) https://doi.org/10.1117/12.2261074
Event: SPIE Commercial + Scientific Sensing and Imaging, 2017, Anaheim, California, United States

Abstract

Contactless temperature sensing is state of the art and essential part of countless applications in the field of process control and automation. This contribution presents the case of a nondestructive thickness measurement method for polymeric coatings on concrete ground. Two pyrometers and a low-cost infrared camera were taken into account. The particular measurement results were compared with those of a more sophisticated infrared camera. It was found that the low-cost infrared camera has a lower noise level than the pyrometers, even for a single pixel. The opportunity to average over a large number of pixels and to establish a bias correction enables a further noise reduction by almost factor of 10. Furthermore, the temporal resolution of the infrared camera was investigated by means of a well-defined thermal oscillation. It could be demonstrated that the averaged time stamps are correct and the requirement of a minimum framerate of 50 Hz is met. Finally, the temperature transient on a polymer coated concrete block during and after a 10 s heating period was recorded with a pyrometer and the infrared camera. This experiment confirmed the suitability of the camera for the intended measurement method.

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Rainer Krankenhagen and Simon J. Altenburg "Direct comparison of two pyrometers and a low-cost thermographic camera for time resolved LWIR temperature measurements", Proc. SPIE 10214, Thermosense: Thermal Infrared Applications XXXIX, 1021414 (5 May 2017); https://doi.org/10.1117/12.2261074

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