Title: Optical tomography system using Digital Signal Processor: velocity profile measurement

Authors: Ruzairi Abdul Rahim, Chiam Kok Thiam, Mohd Hafiz Fazalul Rahiman, Yvette Shaan-Li Susiapan, P. Jayasuman

Addresses: Faculty of Electrical Engineering, Control and Instrumentation Engineering Department, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia. ' Faculty of Electrical Engineering, Control and Instrumentation Engineering Department, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia. ' School of Mechatronic Engineering, Universiti Malaysia Perlis, 02600 Jejawi, Perlis, Malaysia. ' Faculty of Electrical Engineering, Control and Instrumentation Engineering Department, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia. ' Faculty of Electrical Engineering, Control and Instrumentation Engineering Department, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia

Abstract: The DSP system was customised to control the data acquisition process of 16 × 16 optical sensors array, arranged in parallel beam projection. The data collected was used to reconstruct the cross sectional image of the pipeline conveyor. For image display purpose, the reconstructed image was sent to a personal computer via serial communication. By measuring the flow velocity at each pixel, a profile of flow velocity is obtained and termed as Velocity Profile. The method used to measure the flow velocity at each pixel by cross correlating the upstream pixel values with respective downstream pixel values or upstream sensor values with respective downstream sensor values. The algorithm to perform cross correlation is discussed.

Keywords: optical tomography; velocity measurement; digital signal processing; DSP; data acquisition; optical sensors; sensor arrays; pipeline conveyors; flow velocity; cross-sectional images.

DOI: 10.1504/IJSISE.2009.029325

International Journal of Signal and Imaging Systems Engineering, 2009 Vol.2 No.1/2, pp.17 - 26

Published online: 19 Nov 2009 *

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