图像光谱技术实现精确测温

建立了一种以灰体辐射为基础测量温度的新方法，它不仅可以测定辐射体的实时温度，而且可以实现无接触和高精度测量。首先，利用多通道CCD图像光谱仪精确测量辐射体在较宽波段内的辐射光谱，作为该辐射体的指纹光谱，将其定义为一个等效的灰体;其次，通过对所测光谱的拟合确定该辐射体的灰体辐射模型的系数，从而确定待测辐射体的灰体辐射模型;最后，通过光谱技术与灰体辐射模型的结合确定给定辐射体的任意温度。通过对无火焰和有火焰这两类热辐射体的实验检验，表明该测温方法具有实时、准确和无接触等优点。

Precise Temperature Measurement with Imaged Spectral Technique

A new method for temperature measurement is established based on the gray‐body radiation ,which can not only deter‐mine the real‐time temperature of thermal source ,but also conduct non‐contacted temperature measurement with high precision . First ,a wide‐band emission spectrum of the given radiation source is measured precisely with a multi‐channel CCD image spec‐trometer ,which is served as its spectral fingerprints for establishing a gray‐body radiation model ;Secondly ,the coefficients in‐troduced in the gray‐body radiation model are determined by fitting the measured emission spectrum ;Finally ,a combination of spectroscopic technique and the gray‐body radiation model is employed to measure any temperature of the given radiation source . Having tested on both types of radiation sources ,with and without a flame ,the present work has demonstrated that the imaged spectral approach mentioned above can be utilized as a real‐time ,high precision and non‐contacted technique for temperature measurement .