比色测温的波长选择

介绍了辐射测温的基本原理,以比色测温的原理为基础,探讨在辐射测温中波长选择的方法原则.通过黑体能流密度的推导,对输出电压比值范围、信噪比方面做了详细的分析,得出具体的数据来判断被测物体的温度对波长的要求,并且对窄带滤镜代替单点波长计算的方法的合理性进行了证明.文中波长选择的方式方法适用于各个温度段在使用辐射测温时的波长选择.文章最后通过测温系统得到的实验数据证明了波长选择的正确性,基本做到消去一部分发射率的影响.

The wavelength selection of colorimetric temperature measurement

This paper first introduces the basic principle of radiation thermometry,and then based on the principle of colorimetric temperature measurement,explores the method and principle of wavelength selection in radiation thermometry.With the derivation of the energy flux density of blackbody,the range of ratios of the output voltage and signal-to-noise are analysed in detail,drawing specific data to determine the requirement of wavelength according to temperature of the tested object,and the rationality of the method using narrowband filter to substitute single point wavelength is proved.The method of wavelength selection presented in this paper is suitable for various temperature ranges in wavelength selection of radiation thermometry.Finally,the experimental data obtained by the temperature measurement system proves the correctness of the wavelength selection,which basically eliminates influence of emissivity to a certain degree.