Quality monitoring of laser beam welding process

The invention relates to a method for monitoring a laser beam welding process. A weld seam is formed by melting a material of at least one workpiece with a laser beam, the method comprises the following steps: observing the welding process by means of at least one event-based sensor, which is divided into pixels, wherein the sensor outputs an event associated with the pixel whenever the intensityof light incident on the pixel changes at least by a predetermined percentage; determining subsets of events from a total set of events output by the sensor, each subset being caused by a different spatter released by molten material during the welding process; evaluating a quality determination of the welding process and/or of the workpiece from the determined subset of events. The invention alsorelates to a method for training an artificial neural network used herein. 用于监视激光束焊接过程的方法，在所述激光束焊接过程中通过用激光束熔化至少一个工件的材料来形成焊缝，所述方法具有以下步骤：利用至少一个划分为像素的基于事件的传感器来观察所述焊接过程，其中每当入射到像素上的光强度至少改变预给定的百分比时，所述传感器就输出与该像素关联的事件；从所述传感器输出的事件的总集合