基于比色原理的鎂合金燃點測溫系統(tǒng)研究
發(fā)布時間：2019-03-31 08:10
【摘要】：針對傳統(tǒng)鎂合金燃點測試方法具有的響應速度慢,破壞被測溫度場,測溫精度低等弊端,提出了一種新型的比色測溫系統(tǒng)。介紹了系統(tǒng)的測溫原理及結構,提出根據(jù)鎂合金燃燒時光譜強度出現(xiàn)爆發(fā)性增長導致系統(tǒng)兩路光輻射電壓輸出曲線出現(xiàn)拐點來確定鎂合金燃點的方法。利用光譜儀測量鎂合金燃燒前后的光譜強度,為選取系統(tǒng)帶寬和確定系統(tǒng)中心波長提供依據(jù)。利用高溫黑體校準源M390對比色測溫系統(tǒng)進行靜態(tài)校準,獲得系統(tǒng)的靜態(tài)校準系數(shù),最后利用大功率直流電源作為熱源點燃鎂合金(AZ80),同時分別利用已標定過的比色測溫系統(tǒng)和高速工業(yè)級光纖紅外變送器OS4000測量鎂合金燃點溫度,結果表明兩者之間的相對誤差為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%.
【作者單位】： 中北大學電子測試技術國家重點實驗室;
【基金】：國家自然基金資助項目(61473267) 山西省回國留學人員科研資助項目(2012-068) 太原市科技局明星專項資助項目(120247-20)資助
【分類號】：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%.
【作者單位】： 中北大學電子測試技術國家重點實驗室;
【基金】：國家自然基金資助項目(61473267) 山西省回國留學人員科研資助項目(2012-068) 太原市科技局明星專項資助項目(120247-20)資助
【分類號】：TH811
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