本文選題：紅外　切入點：溫度測量　出處：《中北大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著紅外應(yīng)用的擴展和探測器技術(shù)的發(fā)展,非制冷紅外熱像儀的測溫功能得到越來越廣泛的應(yīng)用。紅外熱像儀為復雜環(huán)境中的超高溫度場測量技術(shù)研究提供了嶄新的思路。本文針對超高溫度場測量的應(yīng)用需求,在紅外輻射測溫理論基礎(chǔ)上,分析實現(xiàn)紅外測溫的關(guān)鍵技術(shù),建立紅外熱像儀測溫物理模型,實現(xiàn)了長波紅外熱像儀的超高溫度場測量,并且整合出完整的紅外熱像儀溫度場測量系統(tǒng),并進行現(xiàn)場實驗,達到較好效果。圍繞紅外測溫的特殊需求,分析熱像儀得到的輻射量情況,推演出可實現(xiàn)紅外熱像儀溫度測量的方法。針對測溫需求,本課題選擇定制一款長波非制冷紅外熱像儀作為研究對象,結(jié)合標準輻射源黑體搭建輻射定標平臺,并進行定制的熱像儀性能初探。實驗發(fā)現(xiàn)采取該熱成像系統(tǒng)在較低溫度出現(xiàn)探測器飽和情況。為解決問題提出添加衰減裝置紅外衰減片的方案擴展探測器的飽和閾值,進一步進行定標實驗。由于熱成像系統(tǒng)積分時間可調(diào),建立一種簡便的輻射定標模型,實現(xiàn)一次定標完成全部積分時間的標定。為驗證該模型的準確性,采取溫度反演的方法計算測溫誤差,保證紅外測溫的精確度�？紤]到紅外熱像儀的測溫穩(wěn)定性,進行相應(yīng)的性能評估。結(jié)合紅外熱成像系統(tǒng)的性能評價標準,對定制紅外熱像儀的信號傳遞函數(shù)SiTF、噪聲等效溫差NETD、測溫一致性和測溫范圍進行研究,測試結(jié)果證明該設(shè)備性能穩(wěn)定,為該熱像儀的使用和應(yīng)用拓展提供了可參考的依據(jù)。針對溫壓炸藥爆炸溫度場測量的特殊性,建立野外的紅外測溫模型,進行熱像儀的精確測溫研究,并進行爆炸現(xiàn)場實驗。為保證實驗數(shù)據(jù)的準確性,采取待測溫壓PMX炸藥和TNT參照實驗的方法。為簡化數(shù)據(jù)處理的繁瑣操作,應(yīng)用MATLAB開發(fā)專用的爆溫測試數(shù)據(jù)處理軟件。該軟件以實時爆炸數(shù)據(jù)為依據(jù),直觀地顯示爆炸超高溫度場的測試參數(shù),可方便溯源和進行二次開發(fā),同時進一步拓展了熱像儀的應(yīng)用領(lǐng)域。
[Abstract]:With the expansion of infrared applications and the development of detector technology, The function of uncooled infrared thermal imager is more and more widely used. Infrared thermal imager provides a new idea for the research of ultra-high temperature field measurement technology in complex environment. This paper aims at the application demand of ultra-high temperature field measurement. Based on the theory of infrared radiation temperature measurement, the key technology of infrared temperature measurement is analyzed, and the physical model of infrared thermal imager is established, and the ultra-high temperature field measurement of long wave infrared thermal imager is realized. And integrated a complete infrared thermal imager temperature field measurement system, and carried out field experiments to achieve better results. Around the special requirements of infrared temperature measurement, the radiation obtained by the thermal imager is analyzed. This paper deduces the method of temperature measurement of infrared thermal imager. According to the requirement of temperature measurement, this subject chooses a long wave uncooled infrared thermal imager as the research object, and combines the blackbody of standard radiation source to build the radiation calibration platform. In order to solve the problem, the scheme of adding attenuator infrared attenuator to extend the saturation threshold of detector is put forward to solve the problem. Further calibration experiments are carried out. Because the integral time of thermal imaging system can be adjusted, a simple radiometric calibration model is established to realize the calibration of all integral time at one time. In order to verify the accuracy of the model, The temperature inversion method is adopted to calculate the temperature measurement error to ensure the accuracy of the infrared temperature measurement. Considering the stability of the infrared thermal imager, the corresponding performance evaluation is carried out, and the performance evaluation standard of the infrared thermal imaging system is combined. The signal transfer function (SiTF), the noise equivalent temperature difference (NETD), the consistency of temperature measurement and the range of temperature measurement of the custom infrared thermal imager are studied. The test results show that the performance of the device is stable. This paper provides a reference basis for the use and application of the thermal imager. In view of the particularity of the temperature field measurement of temperature and pressure explosive explosion, the infrared temperature measurement model in the field is established, and the accurate temperature measurement research of the thermal imager is carried out. In order to ensure the accuracy of experimental data, the method of PMX explosive and TNT reference experiment is adopted to simplify the complicated operation of data processing. This software is based on the real time explosion data and can display the test parameters of the explosion super-high temperature field intuitively, which can be easily traceable and secondary developed. At the same time, the application field of thermal imager is further expanded.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN21

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