| 光谱学与光谱分析 |
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| Precise Temperature Measurement with Imaged Spectral Technique |
| LI Yao, DAI Chang-jian* |
| School of Science, Tianjin University of Technology, Tianjin 300384, China |
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Abstract A new method for temperature measurement is established based on the gray-body radiation, which can not only determine the real-time temperature of thermal source, but also conduct non-contacted temperature measurement with high precision. First, a wide-band emission spectrum of the given radiation source is measured precisely with a multi-channel CCD image spectrometer, which is served as its spectral fingerprints for establishing a gray-body radiation model; Secondly, the coefficients introduced in the gray-body radiation model are determined by fitting the measured emission spectrum; Finally, a combination of spectroscopic technique and the gray-body radiation model is employed to measure any temperature of the given radiation source. Having tested on both types of radiation sources, with and without a flame, the present work has demonstrated that the imaged spectral approach mentioned above can be utilized as a real-time, high precision and non-contacted technique for temperature measurement.
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Received: 2014-11-11
Accepted: 2015-02-25
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Corresponding Authors:
DAI Chang-jian
E-mail: daicj@126.com
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