The Detection of Spark Scattering in the Slab Cutting Process Through Deep SVDD Based on Weakly Supervised Learning
Seong-Uk Kim, Jee Hyun Paik, Su-Sang Kim, Joong-Hae Park, Joon-Woong Lee · Journal of Institute of Control Robotics and Systems · 2022
In the continuous casting process, which is one of the steel manufacturing processes, a slab is cut by a torch cutter. During cutting, sparks are generated around the slab; if a problem occurs, the sparks are scattered. The failure in recognizing this problem early on can lead to huge losses and serious accidents. Using learning-based network model, this paper proposes a method of spark scattering detection that can be used in the steel manufacturing process. However, since the spark scattering occurs very intermittently, it becomes difficult to secure sufficient data for network learning. To resolve this issue, this study uses an anomaly detection method through Deep SVDD. This study also applies a weakly supervised learning framework using a small amount of spark scattering data so that the network can extract discriminative features for normal and abnormal situations.