在现代动力学发射系统中, 在强电磁场激发下瞬间产生的等离子体的火焰辐射温度对飞行目标运动状态以及动力系统轨道烧灼情况有着重要的影响。 针对该情况下火焰不仅温度极高, 而且其产生是一个瞬态过程。 因此, 传统的接触式测温方法不再使用, 而基于光学高温计和CCD成像阵列等非接触式测温方法也无法响应瞬态过程。 文章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。 该高温计可以对目标产生的从300～860 nm的波段内任意波长光谱的提取, 最快响应时间可达到2ns。 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。 实验结果表明, 利用目标发出的多光谱辐射测温与高速响应光电探测器件相结合的方法能够测量得到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

In modern dynamics system, the radiant temperature of the flame, which caused by the transient plasma stimulated by high-energy-level electromagnetism field, takes an important role in the description of the flying object’s 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 through contracted ways, either static ways such as traditional pyrophotometer or CCD arrays. In the present paper, the authors bring forward a novel pyrophotometer based on classical theory of Planck’s law (blackbody radiation law) and multi-channel spectrums radiation method. With this new type pyrophotometer, any spectrum can be selected out from the wavelength of 300 to 860 nm within 2 ns. Also, the application of high-definition diffraction grating and fibers can ensure the accuracy of selected spectrum. The results through a serial of experiments by using this theory as well as high-speed photodetector indicate that this method is valid and accurate for the measurement of the object’s surface’s radiant temperature.