胆甾相液晶在不同温度下显示不同的颜色，这一特性已被广泛地应用于固体表面或流体的温度测量．胶囊式胆甾相液晶具有粒子形态和温度－颜色反应特性，可以用来同时测量流体的速度和温度场．作者改进了粒子测速的测试精度；还标定了色度－温度关系，获得了自然对流流场中的速度和温度场 Cholesteric liquid crystals display different colors at different temperatures, and this property has been widely applied to the measurement of the temperature of a solid surface or a fluid. Capsule cholesteric liquid crystals with particle morphology and temperature-color reaction characteristics can be used to simultaneously measure the fluid velocity and temperature fields. The author improved the test accuracy of particle velocity measurement, and also calibrated the relationship between color temperature and temperature, obtained the velocity and temperature field in the natural convection flow field