基于比色原理的镁合金燃点测温系统研究
发布时间:2019-03-31 08:10
【摘要】:针对传统镁合金燃点测试方法具有的响应速度慢,破坏被测温度场,测温精度低等弊端,提出了一种新型的比色测温系统。介绍了系统的测温原理及结构,提出根据镁合金燃烧时光谱强度出现爆发性增长导致系统两路光辐射电压输出曲线出现拐点来确定镁合金燃点的方法。利用光谱仪测量镁合金燃烧前后的光谱强度,为选取系统带宽和确定系统中心波长提供依据。利用高温黑体校准源M390对比色测温系统进行静态校准,获得系统的静态校准系数,最后利用大功率直流电源作为热源点燃镁合金(AZ80),同时分别利用已标定过的比色测温系统和高速工业级光纤红外变送器OS4000测量镁合金燃点温度,结果表明两者之间的相对误差为0.98%。
[Abstract]:Aiming at the disadvantages of traditional measuring method of magnesium alloy ignition point, such as slow response speed, damage to measured temperature field and low precision of temperature measurement, a new colorimetric temperature measurement system is proposed. This paper introduces the temperature measurement principle and structure of the system, and puts forward a method to determine the ignition point of magnesium alloy according to the explosive growth of the spectral intensity during the combustion of magnesium alloy and the inflection point of the output curve of the two optical radiation voltages of the system. The spectral intensity of magnesium alloy before and after combustion is measured by spectrograph, which provides the basis for selecting the bandwidth of the system and determining the central wavelength of the system. The static calibration coefficient of high temperature blackbody calibration source M390 was obtained by comparing color temperature measurement system with M390. Finally, high power DC power supply was used as heat source to ignite magnesium alloy (AZ80). At the same time, the calibrated colorimetric temperature measurement system and the high-speed industrial fiber infrared transmitter OS4000 are used to measure the ignition point temperature of magnesium alloy, respectively. The results show that the relative error between them is 0.98%.
【作者单位】: 中北大学电子测试技术国家重点实验室;
【基金】:国家自然基金资助项目(61473267) 山西省回国留学人员科研资助项目(2012-068) 太原市科技局明星专项资助项目(120247-20)资助
【分类号】:TH811
[Abstract]:Aiming at the disadvantages of traditional measuring method of magnesium alloy ignition point, such as slow response speed, damage to measured temperature field and low precision of temperature measurement, a new colorimetric temperature measurement system is proposed. This paper introduces the temperature measurement principle and structure of the system, and puts forward a method to determine the ignition point of magnesium alloy according to the explosive growth of the spectral intensity during the combustion of magnesium alloy and the inflection point of the output curve of the two optical radiation voltages of the system. The spectral intensity of magnesium alloy before and after combustion is measured by spectrograph, which provides the basis for selecting the bandwidth of the system and determining the central wavelength of the system. The static calibration coefficient of high temperature blackbody calibration source M390 was obtained by comparing color temperature measurement system with M390. Finally, high power DC power supply was used as heat source to ignite magnesium alloy (AZ80). At the same time, the calibrated colorimetric temperature measurement system and the high-speed industrial fiber infrared transmitter OS4000 are used to measure the ignition point temperature of magnesium alloy, respectively. The results show that the relative error between them is 0.98%.
【作者单位】: 中北大学电子测试技术国家重点实验室;
【基金】:国家自然基金资助项目(61473267) 山西省回国留学人员科研资助项目(2012-068) 太原市科技局明星专项资助项目(120247-20)资助
【分类号】:TH811
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