基于热成像仪测温的热惯量模型及实验验证

Thermal Inertia Model Based on Thermal Imager Temperature Measurement and Experimental Validation

为了研究地形热惯量的测量方法,本文采用理论分析方法建立了包括太阳辐射、大气辐射、地面辐射、内部热传导在内的地形表面传热模型,给出了求解热惯量的控制方程及边界条件,并利用傅里叶分析对含有热惯量的偏微分方程进行了数学求解,建立了基于热成像仪测温的热惯量理论模型。通过对比被测土壤的热惯量真值与模型测量值,对理论模型进行了实验验证,分析了模型的测量准确性,模型对五种地形材料的热惯量测量误差均小于10%,可以准确地反映地形热惯量的真值。

In order to study the measurement method of terrain thermal inertia,theoretical analysis methods are adopted in this paper to establish a terrain surface heat transfer model including solar radiation,atmospheric radiation,ground radiation,and internal heat conduction.In this paper,the governing equations and boundary conditions for solving thermal inertia are given,the partial differential equations containing thermal inertia are mathematically solved using Fourier analysis,and a thermal inertia theoretical model based on the temperature measurement of a thermal imager was established.By comparing the true value of the thermal inertia of the tested soil with the measured value of the model,the theoretical model is verified experimentally,and the measurement accuracy of the model is analyzed.The model's measurement error of thermal inertia for the five terrain materials is less than 10%,which can reflect the true value of terrain thermal inertia accurately.