Hardware Development of Dual-Modality Tomography Using Electrical Resistance and Ultrasonic Transmission Tomography for Imaging Liquid and Gas

• Main Authors: Fazlul Rahman, Mohd Yunus, Suzanna, Ridzuan Aw, Ruzairi, Abdul Rahim, Leow, Pei Ling, Mohd Hafiz, Fazalul Rahiman, Yasmin, Abdul Wahab, Nor Muzakir, Nor Ayob, Shahrulnizahani, Mohammad Din, Puspanathan, Jaysuman
• Format: Book Section
• Language: English
• Published: Springer 2022
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://umpir.ump.edu.my/id/eprint/37489/1/37.A%20Study%20on%20the%20Arrival%20Time%20of%20Ultrasonic%20Waves%20in%20Concrete%20Material.pdf; http://umpir.ump.edu.my/id/eprint/37489/; https://doi.org/10.1007/978-981-19-3923-5; https://doi.org/10.1007/978-981-19-3923-5

In decades, single-modality technique focuses on particular application such as liquid/gas, gas/solid, liquid/liquid and liquid/solid which has drawbacks in imaging complex flow with multiple components. This paper focuses on the development of dual-modality tomography system (DMT) integrating ultrasonic tomography and electrical resistance tomography (ERT) to visualize cross-sectional images of two-phase liquid/gas in vertical column. A combination of soft-field and hard-field tomography system measures different physical parameters of two-phase liquid/gas specific of two different material properties which are conductivity (σ) and acoustics impedance (Z). A DMT system is developed with 16 units of ultrasonic transceiver sensors, and 16 units of ERT electrode positioned alternately on a single-plane arrangement to perform measurement simultaneously. The reconstructed tomographic images obtained from measurement data from these two modalities are then fused into a single tomographic image by employing discrete wavelet transform (DWT).