Video analysis of the degassing process
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Engineering mathematics and computational science (MPENM), MSc
Publicerad
2023
Författare
Lanai, Noah
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This thesis presented a collaborative effort between Ovako and Swerim to create a
system to assist operators decision-making during the degassing stage of Ovako’s
steel production, using video data obtained from the degassing camera feed. The
purpose of the project was to explore all potential information that could be extracted from the camera feed. This would act as proof-of-concept for such a system.
The research goal were accomplished by employing image analysis techniques and
statistical methods to collect as much relevant information as possible. Traditional
image analysis techniques were utilized for segmentation and feature extraction,
which were combined with statistical methods to estimate key degassing properties
such as fluid height/volume, fluid movement, and proportions of steel/slag in the
degassing ladle.
The results demonstrated a functional system which processed saved video data,
providing estimated statistics at a chosen frame rate and producing relevant plots
showing the segmentation and statistics. Findings demonstrated ample opportunities for extracting valuable information from the degassing images that exceeded
initial expectations set forth by engineers at Ovako and Swerim. Additionally, a
correlation was seen between extracted statistics from the system and actual video
footage, suggesting the reliability of the system.
This thesis demonstrated the potential of creating a comprehensive system to aid
the operators during degassing. It served as a starting point for further discussions
among the companies regarding refinements to align more closely with operator
needs. More work must be done towards realising the goal, yet this thesis provided
proof of concept that the development of such a system is feasible.
Beskrivning
Ämne/nyckelord
Degassing, image processing, steel production, spatial statistics, video analysis