本文選題：紅外　切入點(diǎn)：溫度測(cè)量　出處：《中北大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著紅外應(yīng)用的擴(kuò)展和探測(cè)器技術(shù)的發(fā)展,非制冷紅外熱像儀的測(cè)溫功能得到越來(lái)越廣泛的應(yīng)用。紅外熱像儀為復(fù)雜環(huán)境中的超高溫度場(chǎng)測(cè)量技術(shù)研究提供了嶄新的思路。本文針對(duì)超高溫度場(chǎng)測(cè)量的應(yīng)用需求,在紅外輻射測(cè)溫理論基礎(chǔ)上,分析實(shí)現(xiàn)紅外測(cè)溫的關(guān)鍵技術(shù),建立紅外熱像儀測(cè)溫物理模型,實(shí)現(xiàn)了長(zhǎng)波紅外熱像儀的超高溫度場(chǎng)測(cè)量,并且整合出完整的紅外熱像儀溫度場(chǎng)測(cè)量系統(tǒng),并進(jìn)行現(xiàn)場(chǎng)實(shí)驗(yàn),達(dá)到較好效果。圍繞紅外測(cè)溫的特殊需求,分析熱像儀得到的輻射量情況,推演出可實(shí)現(xiàn)紅外熱像儀溫度測(cè)量的方法。針對(duì)測(cè)溫需求,本課題選擇定制一款長(zhǎng)波非制冷紅外熱像儀作為研究對(duì)象,結(jié)合標(biāo)準(zhǔn)輻射源黑體搭建輻射定標(biāo)平臺(tái),并進(jìn)行定制的熱像儀性能初探。實(shí)驗(yàn)發(fā)現(xiàn)采取該熱成像系統(tǒng)在較低溫度出現(xiàn)探測(cè)器飽和情況。為解決問(wèn)題提出添加衰減裝置紅外衰減片的方案擴(kuò)展探測(cè)器的飽和閾值,進(jìn)一步進(jìn)行定標(biāo)實(shí)驗(yàn)。由于熱成像系統(tǒng)積分時(shí)間可調(diào),建立一種簡(jiǎn)便的輻射定標(biāo)模型,實(shí)現(xiàn)一次定標(biāo)完成全部積分時(shí)間的標(biāo)定。為驗(yàn)證該模型的準(zhǔn)確性,采取溫度反演的方法計(jì)算測(cè)溫誤差,保證紅外測(cè)溫的精確度。考慮到紅外熱像儀的測(cè)溫穩(wěn)定性,進(jìn)行相應(yīng)的性能評(píng)估。結(jié)合紅外熱成像系統(tǒng)的性能評(píng)價(jià)標(biāo)準(zhǔn),對(duì)定制紅外熱像儀的信號(hào)傳遞函數(shù)SiTF、噪聲等效溫差NETD、測(cè)溫一致性和測(cè)溫范圍進(jìn)行研究,測(cè)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(duì)溫壓炸藥爆炸溫度場(chǎng)測(cè)量的特殊性,建立野外的紅外測(cè)溫模型,進(jìn)行熱像儀的精確測(cè)溫研究,并進(jìn)行爆炸現(xiàn)場(chǎng)實(shí)驗(yàn)。為保證實(shí)驗(yàn)數(shù)據(jù)的準(zhǔn)確性,采取待測(cè)溫壓PMX炸藥和TNT參照實(shí)驗(yàn)的方法。為簡(jiǎn)化數(shù)據(jù)處理的繁瑣操作,應(yīng)用MATLAB開(kāi)發(fā)專用的爆溫測(cè)試數(shù)據(jù)處理軟件。該軟件以實(shí)時(shí)爆炸數(shù)據(jù)為依據(jù),直觀地顯示爆炸超高溫度場(chǎng)的測(cè)試參數(shù),可方便溯源和進(jìn)行二次開(kāi)發(fā),同時(shí)進(jìn)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(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN21

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