【摘要】：隨著紅外技術的發(fā)展,紅外輻射測溫在各大領域中的應用越來越廣泛。蒙皮溫度對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定、輻射傳輸模型的建立、蒙皮發(fā)射率的測量到實驗室環(huán)境下輻射測溫一套較為完整的測量方法。為蒙皮測溫提供一種理論可行的方法,豐富蒙皮測溫理論體系。第1章,主要闡述了蒙皮紅外輻射測溫的研究背景、意義、現(xiàn)狀和技術路線等。第2章,主要研究了基于面源黑體的紅外熱像儀輻射標定。在紅外熱像儀輻射標定中,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)隨機誤差、環(huán)境波動、黑體溫度不穩(wěn)定等對標定結(jié)果的影響和提高標定模型的精度,建立了基于加權(quán)最小二乘的紅外熱像儀標定模型,建立了黑體亮度和熱像儀輸出灰度的響應關系。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目標輻射的測量精度影響很大。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算程序研究了氣象條件、輻射路徑幾何參數(shù)對大氣透射率的影響,最后對計算結(jié)果作了進一步的分析。計算結(jié)果對求解大氣透射率和研究氣象條件、路徑幾何參數(shù)對大氣透射率的影響具有一定的指導意義。第4章,主要研究了蒙皮發(fā)射率的測量。本文利用紅外熱像儀,基于紅外熱圖像對蒙皮發(fā)射率進行了測量,建立了蒙皮溫度及其對應發(fā)射率的函數(shù)變化關系。第5章,主要研究了蒙皮紅外輻射的測溫方法�；诩t外熱像儀的蒙皮測溫精度依賴于大氣溫濕度、大氣透射率等參數(shù)的測量精度。為了減少這種依賴性和提高測量精度,提出了一種基于紅外熱圖像灰度修正的蒙皮輻射測溫方法。并建立了基于實時校標的蒙皮輻射測溫模型。在實驗室環(huán)境下,分別基于紅外熱像灰度修正輻射測溫法和實時校標測溫法對蒙皮進行了測量。結(jié)果表明,在實驗室環(huán)境下,兩者的平均測量誤差均低于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.
【學位授予單位】：沈陽大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN219

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