SHI Hongchen, ZHANG Xiaohuai, SUN Fengrui, et al. Inverse heat transfer algorithm for liquid-level detection of storage tank based on infrared imaging temperature measurement[J]. CIESC Journal, 2012, (12).
SHI Hongchen, ZHANG Xiaohuai, SUN Fengrui, et al. Inverse heat transfer algorithm for liquid-level detection of storage tank based on infrared imaging temperature measurement[J]. CIESC Journal, 2012, (12).DOI: 10.3969/j.issn.0438-1157.2012.12.005.
The traditional liquid-level detection method for storage tank by using thermal infrared imager is mainly digital image processing
so the measurement accuracy is not high.In this paper
a mathematical model of heat transfer in storage tank is built and the temperature distribution of external surface of the tank is solved by finite volume method.An inverse heat transfer algorithm for quantitative identification of liquid-level in storage tank is proposed based on the temperature distribution of external surface of the tank and the effects of initial guess
measurement error(σ)and maximum surface temperature difference on the level detection results are investigated.The results show that within the range of acceptable measurement error in engineering applications(σ=2℃)
the inversion liquid-level has a high accuracy
with relative error less than 2%.It provides a new thought and a way for the liquid-level detection for storage tank.