Accuracy of two-color pyrometry using color high-speed cameras for measurement of luminous flames

Hiroyuki Usui; Kenji Mitsui

doi:10.1117/12.725173

11 January 2007 Accuracy of two-color pyrometry using color high-speed cameras for measurement of luminous flames

Hiroyuki Usui, Kenji Mitsui

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 627918 (2007) https://doi.org/10.1117/12.725173
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

By the recent development in electronics, including new solid-state image sensors such as area CCD and C-MOS sensors and the progress of image processing techniques, new imaging radiometers have been developed which two-dimensionally acquire image data of objects moving at a high speed and under high temperature, and (graphically) present the temperature distribution over the object immediately. We successfully measured the temperature distribution and the term KL distribution, which is the absorption strength of combustion in diesel engine cylinders or other luminous flames taking place at a high speed, using single-sensor color high-speed cameras and applying two-color pyrometry introduced by H. C. Hottel and F. P. Btoughton. The measurement accuracy depends on the accuracy of color reproducibility of the high-speed camera being used which is considered a brightness pyrometer, because two-color pyrometry for measuring luminous flames is based on the brightness temperature at two wavelength bands such as red and green. In this paper, we present a method of maintaining the accuracy of measurement using a high-speed camera as a brightness pyrometer and of two-color pyrometry that was developed based on it.

Citation Download Citation

Hiroyuki Usui and Kenji Mitsui "Accuracy of two-color pyrometry using color high-speed cameras for measurement of luminous flames", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 627918 (11 January 2007); https://doi.org/10.1117/12.725173

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KEYWORDS

Temperature metrology

High speed cameras

Cameras

Pyrometry

Combustion

Sensors

CCD image sensors

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