Altering Spectrum Method in Temperature Measurement Using Infrared Imager in Complex Background Environment

Abstract:

To improve the accuracy of temperature measurement using infrared imager in complex background environment, based on the principles and the formulas of temperature measurement using infrared imager, altering spectrum method in the infrared temperature measurement was derived. For the temperature measurement of gray body in complex background environment, three response bands should be selected in temperature measurement, and then the surface temperature could be obtained by solving responding two iterative equations. This method could be achieved technologically by two means: setting filters in front of infrared imager, or using infrared imagers with different bands. The simulation results show that the temperature of measured object could be obtained with high accuracy through the method, and its error is very small. Through this method, the temperature of measured object could be obtained without knowing its emissivity and background radiation, so the error caused by the measurement of the emissivity of measured object and background radiation could be reduced.

• Periodical: Advanced Materials Research (Volumes 479-481)
• Pages: 348-351
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.479-481.348
• Online since: February 2012
• Authors: Zhen Yang, Shi Cheng Zhang, Li Yang
• Keywords: Altering Spectrum Method, Background Radiation, Emissivity, Infrared Temperature Measurement, Single-Band Infrared Imager

References

[1] Li Yang: Infrared Technology, Vol. 21(1999), p.20.(In Chinese)

[2] Gaussorgue G: Infrared Thermography (Chapman & Hall, London 1994).

[3] Jingmin Dai: Techniques of Automation & Applications, Vol. 23(2004), p.1.(In Chinese)

[4] Wei Kou, Li Yang: Infrared Technology, Vol. 23(2001), p.32.(In Chinese)

[5] Jian Zhang, Li Yang, Huikai Liu: Infrared Technology, Vol. 27(2005), p.419.(In Chinese)

[6] Zhen Yang, Shicheng Zhang, Li Yang: Optics and Precision Engineering, Vol.18(2010), p.1960.(In Chinese)

[7] Zhen Yang, Shicheng Zhang, Li Yang: Spectroscopy and Spectral Analysis, Vol.30(2010), p.2094.(In Chinese)