首先从理论上分析了砂轮工作面形貌的夫琅浩费衍射图像，然后通过试验分析了其实际功率谱型。试验结果表明，激光功率谱法能检测砂轮工作面形貌的特征参数及磨耗磨粒切刃的分布图形，定量而直观地评价砂轮的磨削性能，实现砂轮工作面形貌的在线检测与控制。 First of all, the Fraunhofer diffraction image of the working face of the grinding wheel is theoretically analyzed, and then the actual power spectral shape of the working face is analyzed through experiments. The experimental results show that the laser power spectrum method can detect the characteristic parameters of the working face of the grinding wheel and the distribution patterns of the cutting edges of the worn abrasive particles, evaluate the grinding performance of the grinding wheel quantitatively and intuitively, and realize the on-line inspection and control of the working face of the grinding wheel .