建立了激光切割过程视觉检测系统，通过实验方法研究了火花簇射行为与最佳切割速度之间的关系。通过不同功率、不同板厚条件下的变速实验，发现在无缺陷切割区，最佳切割速度对应的火花簇射特征信号为：火花簇射角度垂直向下;出口处亮度最高;各亮度带像素数达到最大值。

A vision sensing system for CO2 laser cutting is designed. By detecting the images of the sparks jet, the relationship between sparks behavior and optimal cutting speed has been investigated. The characteristic signal under different laser power and slab thickness has been obtained. On the given condition, the optimal cutting speed corresponds to the vertical jet angle, the highest outlet brightness and the maximum pixels of different gray scales.