發(fā)布時(shí)間：2018-10-25 19:05

【摘要】：隨著紅外技術(shù)的發(fā)展,紅外輻射測(cè)溫在各大領(lǐng)域中的應(yīng)用越來(lái)越廣泛。蒙皮溫度對(duì)蒙皮紅外輻射特性影響很大,本文著重研究了從紅外熱像儀的輻射標(biāo)定、輻射傳輸模型的建立、蒙皮發(fā)射率的測(cè)量到實(shí)驗(yàn)室環(huán)境下輻射測(cè)溫一套較為完整的測(cè)量方法。為蒙皮測(cè)溫提供一種理論可行的方法,豐富蒙皮測(cè)溫理論體系。第1章,主要闡述了蒙皮紅外輻射測(cè)溫的研究背景、意義、現(xiàn)狀和技術(shù)路線等。第2章,主要研究了基于面源黑體的紅外熱像儀輻射標(biāo)定。在紅外熱像儀輻射標(biāo)定中,普遍采用精度不太理想的最小二乘法。為了考慮因熱像儀系統(tǒng)隨機(jī)誤差、環(huán)境波動(dòng)、黑體溫度不穩(wěn)定等對(duì)標(biāo)定結(jié)果的影響和提高標(biāo)定模型的精度,建立了基于加權(quán)最小二乘的紅外熱像儀標(biāo)定模型,建立了黑體亮度和熱像儀輸出灰度的響應(yīng)關(guān)系。第3章,主要研究了蒙皮紅外輻射在大氣中的傳輸衰減。紅外輻射大氣透射率對(duì)目標(biāo)輻射的測(cè)量精度影響很大。分析了紅外輻射在大氣中的傳輸衰減,建立了大氣透射率的求解模型。利用編制的大氣透射率計(jì)算程序研究了氣象條件、輻射路徑幾何參數(shù)對(duì)大氣透射率的影響,最后對(duì)計(jì)算結(jié)果作了進(jìn)一步的分析。計(jì)算結(jié)果對(duì)求解大氣透射率和研究氣象條件、路徑幾何參數(shù)對(duì)大氣透射率的影響具有一定的指導(dǎo)意義。第4章,主要研究了蒙皮發(fā)射率的測(cè)量。本文利用紅外熱像儀,基于紅外熱圖像對(duì)蒙皮發(fā)射率進(jìn)行了測(cè)量,建立了蒙皮溫度及其對(duì)應(yīng)發(fā)射率的函數(shù)變化關(guān)系。第5章,主要研究了蒙皮紅外輻射的測(cè)溫方法。基于紅外熱像儀的蒙皮測(cè)溫精度依賴(lài)于大氣溫濕度、大氣透射率等參數(shù)的測(cè)量精度。為了減少這種依賴(lài)性和提高測(cè)量精度,提出了一種基于紅外熱圖像灰度修正的蒙皮輻射測(cè)溫方法。并建立了基于實(shí)時(shí)校標(biāo)的蒙皮輻射測(cè)溫模型。在實(shí)驗(yàn)室環(huán)境下,分別基于紅外熱像灰度修正輻射測(cè)溫法和實(shí)時(shí)校標(biāo)測(cè)溫法對(duì)蒙皮進(jìn)行了測(cè)量。結(jié)果表明,在實(shí)驗(yàn)室環(huán)境下,兩者的平均測(cè)量誤差均低于3.2%。
[Abstract]:With the development of infrared technology, infrared radiation temperature measurement is more and more widely used in various fields. The skin temperature has a great influence on the infrared radiation characteristics of the skin. In this paper, the calibration of infrared thermal imager and the establishment of radiation transfer model are studied. The measurement of skin emissivity is a complete method of measuring radiation temperature in laboratory environment. It provides a theoretical and feasible method for skin temperature measurement, and enriches the theoretical system of skin temperature measurement. In chapter 1, the research background, significance, current situation and technical route of skin infrared radiation temperature measurement are described. In chapter 2, the radiation calibration of infrared thermal imager based on non-point black body is studied. The least square method with low precision is widely used in the infrared thermal image calibration. In order to consider the effect of random error, environmental fluctuation and blackbody temperature instability on the calibration results and improve the accuracy of calibration model, a calibration model of infrared thermal imager based on weighted least squares was established. The response relationship between the blackbody brightness and the output gray scale of the thermal imager is established. In chapter 3, the attenuation of infrared radiation in the atmosphere is studied. The atmospheric transmittance of infrared radiation has great influence on the measurement accuracy of target radiation. The transmission attenuation of infrared radiation in atmosphere is analyzed and the model of atmospheric transmittance is established. The effects of meteorological conditions and geometric parameters of radiation path on atmospheric transmittance are studied by using the program for calculating atmospheric transmittance. Finally, the calculated results are further analyzed. The calculated results have a certain guiding significance for solving atmospheric transmittance and studying the influence of path geometry parameters on atmospheric transmittance. In chapter 4, the measurement of skin emissivity is studied. In this paper, the emissivity of the skin is measured based on the infrared thermal image, and the functional relationship between the skin temperature and its corresponding emissivity is established. In chapter 5, the method of measuring infrared radiation of skin is studied. The accuracy of skin temperature measurement based on infrared thermal imager depends on the measurement accuracy of atmospheric temperature and humidity, atmospheric transmittance and other parameters. In order to reduce this dependence and improve the measurement accuracy, a skin radiation temperature measurement method based on gray correction of infrared thermal image is proposed. A model of radiation temperature measurement based on real-time calibration was established. In the laboratory environment, the skin was measured based on infrared thermal image gray modified radiation temperature measurement method and real time calibration temperature measurement method. The results show that the average measurement errors are lower than 3.2 in laboratory environment.
【學(xué)位授予單位】：沈陽(yáng)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TN219

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