A new Laser Process Control System (LPCS) enables on-line detection of laser welding process features and defects. Laser welding is being applied more in various large-volume manufacturing sectors, including automotive, ship, railway coach, and aircraft production. Its advantages are numerous: high production rates, easy automation, cost-effectiveness, high-quality welds, and low heat input, among others. Although steel sheet is the largest laser-welded material, laser welding is being accepted in many new applications because a laser beam can weld a large range of plate thicknesses and materials due to an increased availability of high laser power [1]. The ever-increasing requirements for improved product quality and higher production rates are putting pressure on improvements in online monitoring of the automated welding process. Without online sensor monitoring, any malfunctions of this process can go undetected and lead to costly situations. Laser triangulation cameras are used for online monitoring of the weld bead geometry right after the welding point. This monitoring technique is successfully used in many sheet metal processes, such as in the tailor-welded blanks now wid...