The occurrence of a mesoscopic scale in granular materials leads to a sharp increase in the number of interaction processes at both intra- and inter-scale levels. The mesoscopic scale is the main source of the complex macroscopic properties of granular materials. The quantification of mesoscopic disordered movements is often referred to as granular temperature. In this paper, we first introduce the physical meaning of the original granular temperature of a kinetic nature, T_k, and then briefly summarize the advances made over the past few decades. Our research group has focused on T_k measurement using speckle visibility spectroscopy. The principle of this technique and the instruments developed in our research group are briefly introduced. Our work shows great promise in the measurement of kinetic granular temperature. Finally, a summary of granular temperature and some recent developments in speckle visibility spectroscopy measurements are presented.

粒状材料中介观尺度的出现导致尺度内和尺度间水平的相互作用过程数量急剧增加。介观尺度是颗粒材料复杂的宏观性能的主要来源。介观无序运动的量化通常称为颗粒温度。在本文中，我们首先介绍了具有动力学性质的原始颗粒温度T _k的物理含义，然后简要总结了过去几十年中取得的进展。我们的研究小组专注于T _k使用斑点可见度光谱法进行测量。简要介绍了该技术的原理以及我们研究小组开发的仪器。我们的工作在动力学颗粒温度的测量中显示出巨大的希望。最后，总结了颗粒温度和散斑可见度光谱测量的一些最新进展。