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Journal of Microwave Power
and Electromagnetic Energy (JMPEE) |
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TITLE |
Microwave Radiometry for
Continuous Non-Contact Temperature Measurements During Microwave Heating [PDF] |
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AUTHORS |
K.D. Stephan and J.A. Pearce 2005 40 1 49-61 |
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Abstract Temperature measurement during
microwave heating in industrial and commercial processes can improve quality,
throughput, and energy conservation. Conventional ways of measuring temperature
inside a microwave oven cavity are costly, inconvenient, or unsuitable for
high-volume industrial applications. In this paper, we describe the theory of
microwave radiometry as applied to the measurement of temperature during
microwave heating. By extending the theory of radiative
transfer to the case of thermal microwave radiation inside a cavity, we show
that the same characteristics which make a microwave cavity suitable for
heating materials also assist in obtaining meaningful temperature data with
microwave radiometry. We present experimental data from the heating of liquid
and solid materials which confirm the essential features of the theory, and
show agreement between this method and more conventional methods of ± |
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