Real-time detection of wave profile changes

•This study adds to the body of knowledge in the field of profile monitoring.•A new type of profiles, sine waves, is considered.•An abnormal profile can be detected before the entire profile is generated.•Simulations on detection rates confirm that the proposed method works as designed.

A statistical process control (SPC) framework is proposed to detect potential changes of a wave profile on a real-time basis. In regular profile monitoring, change detection takes place when a complete profile is generated. In this study, the detection of a potential profile change takes place before the entire information on the profile of interest is fully available. The main research goal is to make a correct process decision as soon as possible. A real-world example of condensation-water-temperature profile monitoring was used to demonstrate the proposed framework. A simulation study was also conducted. The simulation results confirm that the proposed framework is capable of detecting profile changes without having to wait for the entire profile to be generated.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide