论文信息 - Progress on the development of multiwavelength imaging pyrometer

Progress on the development of multiwavelength imaging pyrometer

Experimental Multi-wavelength Imaging Pyrometer (M-WIP) is presented for remote sensing of temperature profiles of targets with unknown spectrally varying emissivity. A software package was developed for calibration and real-time M-WIP measurements. An experimental 7-filter line-sensing M- WIP system was implemented with a 320 X 122-element PtSi IR-CCD imager and an assembly of narrow-band striped IR filters in the spectral range from 1797 nm through 4512 nm. The M-WIP system was calibrated against a commercial blackbody source over temperature range from 450 degree(s)C to 950 degree(s)C. The signal processing included background subtraction, compensation for variation of dark current with detected signal and correction for non-linearities of IR imager response. Initial M-WIP measurements demonstrated real-time temperature resolution (Delta) T of +/- 1 degree(s)C for blackbody target over temperature range from 600 degree(s)C to 900 degree(s)C. Temperature resolution of +/- 4 degree(s)C was demonstrated for the blackbody source viewed through the double polished silicon wafer with unknown spectral transmissivity in the temperature range from 500 degree(s)C to 950 degree(s)C.

Walter F. Kosonocky | Nathaniel J. McCaffrey | Jun Li | Michael B. Kaplinsky | Edwin S. H. Hou

[1] P. B. Coates. Wavelength Specification in Optical and Photoelectric Pyrometry , 1977 .

[2] N. Ravindra,et al. Multi-wavelength imaging pyrometer for noncontact temperature sensing , 1995, 1995 Proceedings of the IEEE International Symposium on Industrial Electronics.

[3] Walter F. Kosonocky. State of the art in Schottky-barrier IR image sensors , 1992, Defense, Security, and Sensing.

[4] D. Dewitt,et al. Theory and practice of radiation thermometry , 1988 .

[5] W. F. Kosonocky,et al. "Construction And Performance Of A 320 X 244-Element IR-CCD Imager With PtSi Schottky-Barrier Detectors , 1989, Defense, Security, and Sensing.

[6] Thomas W. Eagar,et al. Noncontact temperature measurement. II. Least squares based techniques , 1991 .

[7] Walter F. Kosonocky,et al. Radiometric performance of 640x480 and 320x244 PtSi IR cameras , 1994, Defense, Security, and Sensing.

[8] F. A. Seiler,et al. Numerical Recipes in C: The Art of Scientific Computing , 1989 .

[9] Shaohua Liu,et al. Development of emissivity models and induced transmission filters for multiwavelength imaging pyrometry , 1994, Defense, Security, and Sensing.