基于高发射率标靶的物体表面温度快速精确测量研究

针对某些工业现场物体表面温度测量要求快速且精确,红外测温仪直接测温虽然快速,但准确性较低,提出了一种基于高发射率标靶的物体表面温度快速精确测量方法。采用高发射率涂料涂层制作标靶,通过在测量现场使用该标靶,可以避免物体表面发射率对物体表面红外温度测量准确性的影响,同时,对比直接测量和标靶测量结果,消除环境温度、大气温度、测量距离、大气衰减等因素的影响,从而实现物体表面温度测量的快速和准确性。实验结果与理论分析表明,该方法能有效提高物体表面红外温度测量精度,平均测量误差小于1%。

The On-line Measurement of Surface Temperature Based on High Emissivity Target

In some industrial fields, surface temperature measurement requires speed and accuracy. Using infrared thermometer to measure temperature directly is fast, but the accuracy is low. Based on a target of high emissivity, a method of measuring the surface temperature fast and accurately is proposed. The target which made by high emissivity paint can help eliminate the surface emissivity effects on the accuracy of infrared temperature measurement when used in site. At the same time, the influence of ambient temperature, atmospheric temperature, measuring distance, atmospheric attenuation and other factors can be eliminated by comparing the direct measurement and target measurement results. Experimental results and theoretical analysis show that the proposed method can effectively improve the accuracy of infrared surface temperature measurement and the average error of the method is lower than 1%.