本文選題：探測器　切入點(diǎn)：輻射　出處：《光學(xué)學(xué)報》2017年05期 　論文類型：期刊論文

【摘要】：以太陽能多孔吸熱器等熱利用系統(tǒng)為研究背景,針對多孔層表面的紅外測溫問題,基于反向蒙特卡羅法建立了三維非等溫各向異性散射多孔層的紅外測溫模型,討論了散射類型、多孔層厚度、基材發(fā)射率、孔隙率、孔徑等物理性質(zhì)和結(jié)構(gòu)參數(shù)對紅外測溫誤差的影響,提出了一種多孔層表面溫度的反向計算方法。結(jié)果表明,將紅外溫度的實(shí)驗(yàn)測量值視作多孔表面溫度會導(dǎo)致一定誤差;后向散射可削弱高溫背景輻射,從而減小探測溫度較高時的誤差,但增大了探測溫度較低時的誤差;高孔隙率(大于0.93)會造成測溫誤差迅速增大;測溫誤差小于2%時的參數(shù)范圍如下:多孔層厚度為14~27mm,基材發(fā)射率為0.33~0.81,孔隙率為0.86~0.93,孔徑為1.5~2.8mm。
[Abstract]:In view of the infrared temperature measurement problem of porous layer surface, a three-dimensional infrared temperature measurement model of non-isothermal anisotropic porous layer is established based on the inverse Monte Carlo method. The effects of physical properties and structure parameters, such as scattering type, thickness of porous layer, emissivity of substrate, porosity and pore size, on infrared temperature measurement error are discussed. A reverse calculation method for surface temperature of porous layer is proposed. Considering the measured value of infrared temperature as the temperature of porous surface, the backscattering can weaken the background radiation of high temperature, thus reduce the error when the detection temperature is high, but increase the error when the detection temperature is low. High porosity (> 0.93) results in a rapid increase in the temperature measurement error, and the parameters when the temperature error is less than 2 are as follows: the thickness of the porous layer is 147mm, the emissivity of the substrate is 0.330.81, the porosity of the substrate is 0.860.93, and the pore size is 1.5 ~ 2.8mm.
【作者單位】： 哈爾濱工業(yè)大學(xué)能源科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金重點(diǎn)項(xiàng)目(51536001)、基礎(chǔ)科研項(xiàng)目(B2320132001)
【分類號】：TN219
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本文編號：1624911