颜色现象需要亲身体验才能理解记忆,但长期缺乏定量可控的教学实验.针对这些问题开发出2套实验系统,用PC机通过USB接口和单片机,精确控制特制LED混色屏和直流电机驱动的颜色实验转台.色光混合实验系统借助计算机控制R、G、B分量,实现白平衡和颜色按参数变化.颜色转盘实验平台以计算机控制直流电机,驱动多种彩色径向开口圆盘匀速转动,以斩波器和光耦检测转速并实现闭环控制,完成颜色混合实验;还可观察变色频闪光源下呈现的周期彩色图案及主观颜色现象.两套实验系统可重复再现实验现象、定量和实时性好、操作简便,显著提高了色度学实验的教学效果.%To solve the problems in color experiment,two experimental systems were developed using a personal computer and a single-chip computer to accurately control a specially made LED tricolor mixing screen and a DC motor via USB interface and to drive a rotating platform to fulfill color experiments.The color-light mixing system reached white balance and color-changing by using computer to adjust the red,green and blue component.The color rotating platform made the radial chipped circular plate to rotate at an even speed,and the speed was measured by a chopper and photo-electronic coupler to realize closed-loop control,thus,the color mixing experiments were fulfilled.The periodic colorful patterns and subjective color phenomena could also be observed under stroboscopic light sources.These two systems have good properties for quantitative,real-time reproducibility of phenomena.Moreover,they are easy to operate.They can significantly improve the teaching effect of colorimetric experiments.
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