弥散介质条件下辐射测温方法(特邀)

Radiation thermometry method under diffuse medium conditions(Invited)

在航空航天、冶金铸造等各种工业现场高温热试验过程中,需要在高浓度弥散介质遮蔽物件表面的条件下,快速、准确地获取试验件表面的高温温度。传统的辐射测温方法包括波段辐射法、亮度法、比色测温法、多波长测温法等,是实现高温测量的一种主要测量方法。弥散介质由于介质粒子的作用会产生各种光谱散射、吸收和发射效应,给高温的准确测量带来了很大的干扰,导致测量结果产生偏差,必须要改进经典辐射测温方法。论述了弥散介质条件下几种主要的辐射测温方法,包括试验数据反推法、热辐射计算法、多通道分裂窗法、信息复原计算法、神经网络计算法等,分析了各种方法的优点和不足,总结了弥散介质条件下辐射测温方法面临的挑战和发展趋势。

In the process of high temperature thermal experiment in aerospace,metallurgical casting and other industrial fields,it is necessary to obtain the high temperature on the shelter surface of the test piece quickly and accurately under the condition of high concentration of diffuse medium.The traditional radiation temperature measurement methods include band radiation method,brightness method,colorimetric temperature measurement method,multi-wavelength temperature measurement method and so on,which is the main measurement method to realize high temperature measurement.Due to the effect of medium particles,diffuse medium will produce various spectral scattering,absorption and emission effects,which will bring great interference to the accurate measurement of high temperature and lead to deviation of measurement results.It is necessary to improve classical radiation thermometry.Several main radiation thermometry methods under the condition of diffuse medium were discussed,including experimental data inversion method,thermal radiation calculation method,multi-channel split window method,information recovery calculation method,and neural network calculation method.The advantages and disadvantages of various methods were analyzed,and the challenges and development trends of radiation thermometry methods under the condition of diffuse medium were summarized.