Ultrasonic Tomography for Automated Material Inspection
in Liquid Masses
Panagiotis Koulountzios1*, Tomasz Rymarczyk2, Manuchehr Soleimani1
1 Engineering tomography Lab (ETL), University of Bath (Bath BA2 7AY, United Kingdom)
2 Research & Development Centre Netrix S.A. (Wojciechowska 31, Lublin, Poland)
This paper presents the design and modelling of an ultrasonic transmission tomography for detecting two-component high-acoustic impedance mixture. This is used commonly in chemical columns and industrial pipelines where, many Arial, solid or gas particles exists inside liquid masses. Tomographic measurement data throughout reactor volume offers ideal tools for robust control of different material composition quality parameters. An ultrasonic tomography system is developed by Research and Development Centre Netrix S.A., using fan-shaped beam scanning geometry with 20 sensors circle wise topology. Furthermore, a 2D transmission-mode approach was implemented in order to reconstruct from acoustic velocity profile. According to the difference on the penetration depth for given particle concentrations, we calculated the time of flight of the signals to characterize the space domain and effectively detect the different material composition inside the liquid mass. Finally, inverse modelling was employed for image reconstruction from the projection data using various algorithms to compare comprehensively the results for 2D transmission mode using simulated and lab data. The optimization code was implemented in MATLAB to perform forward wave propagation. The results of the experiments and possible improvements were also discussed.
Keywords Ultrasonic Tomography; 2D Transmission mode; Image Reconstruction, Industrial Process
Industrial Application General - Chemicals
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