应用光学, 2011, 32 (4): 698, 网络出版: 2011-08-29   

多光谱瞬态测温计用于动力发射系统火焰测试

Multi-spectral radiation based transient pyrometer for high-speed dynamic system measurement
作者单位
1 南京理工大学电子工程与光电技术学院, 江苏南京210094
2 南京理工大学弹道国防科技重点实验室, 江苏南京210094
摘要
无论在民用钢铁冶炼、焊接技术或者军用近代动力学发射系统中,对于目标火焰的辐射温度测量一直有着重要意义,其对钢铁冶炼成分的判定、焊接工艺的提高和动力系统轨道烧灼的研究都有着重要的影响。该情况下火焰不仅温度极高,而且在某些场合其产生是一个瞬态过程。因此,传统的接触式测温方法不再适用。基于经典的普朗克黑体辐射定律在测量时受到光谱发射效率的影响也难以准确得到最后结果。以经典的普朗克黑体辐射定律作为理论基础,结合多波长光谱辐射方法,研制了新型的多光谱辐射瞬态高温测温计。该高温计最快响应时间可达到2 ns。通过采用高分辨率衍射光栅和光纤连接的方式,保证多光谱提取的准确性。同时将经典的普朗克黑体辐射定律结合多波长提出新型辐射温度算法,不仅解决对该目标辐射温度的精准计算,更可以同时求得目标在该温度下的实时光谱发射效率。通过对高速发射目标和可调节亮度的溴钨灯测量的实验表明,该方法满足测量动力发射目标表面辐射温度分布的同时,也保证了较高的精度,满足了对于发射瞬间物体表面瞬态温度测试的要求。
Abstract
The radiant temperature measurement of the flame plays an important role in steel smelt and welding or dynamic launch system for the description of steel components and flying object status, as well as cauterization of the trajectory. Due to its extremely high temperature and transient process, the radiant temperature of the flame can hardly be measured by traditional methods. A novel pyrophotometer based on classical theory of Plancks law (Blackbody radiation law) and multi-spectral radiation method was put forward. With this pyrophotometer, any spectrum can be selected from the wavelength of 300 nm to 860 nm within 2 ns. The use of high-resolution diffraction grating and fibers ensures the accuracy of the selected spectrum. This instrument provides accurate radiant temperature measurements of object surface and real-time spectral emissivity. The experiments of high-speed flying object and bromine tungsten bulb were conducted. Experimental results indicate that this method is feasible and accurate.

翟洋, 朱日宏, 沈华, 顾金良. 多光谱瞬态测温计用于动力发射系统火焰测试[J]. 应用光学, 2011, 32(4): 698. ZHAI Yang, ZHU Ri-hong, SHEN Hua, GU Jin-liang. Multi-spectral radiation based transient pyrometer for high-speed dynamic system measurement[J]. Journal of Applied Optics, 2011, 32(4): 698.

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