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Optical Engineering

Optical tomography: real-time velocity profile measurement using pixel-to-pixel and sensor-to-sensor method
Author(s): Ruzairi Abdul Rahim; Pang Jon Fea; Chan Kok San
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Paper Abstract

We investigate the real-time velocity profile for optical tomography using the sensor-to-sensor (STS) and pixel-to-pixel (PTP) methods. Although both methods are similar, the pixel-to-pixel velocity is more accurate than sensor-to-sensor velocity because it measures the pixel velocity within all areas of the pipe and the input signals are from upstream and downstream concentration profiles. The sensor-to-sensor velocity measures only the peripheral velocity of pipe. This velocity method obtains the input signals from the receiver output voltage of upstream and downstream sensors. Problems occur during the nonflow condition because the receiver may have noise, resulting in an incorrect velocity, which is not 0 ms–1. This kind of problem does not happen in the pixel-to-pixel velocity method because all of the noise obtained is filtered by the image reconstruction algorithm used in this project. The velocity profile can easily be created by the pixel-to-pixel velocity method.

Paper Details

Date Published: 1 March 2006
PDF: 14 pages
Opt. Eng. 45(3) 033604 doi: 10.1117/1.2183708
Published in: Optical Engineering Volume 45, Issue 3
Show Author Affiliations
Ruzairi Abdul Rahim, Univ. Teknologi Malaysia (Malaysia)
Pang Jon Fea, Univ. Teknologi Malaysia (Malaysia)
Chan Kok San, Univ. Teknologi Malaysia (Malaysia)

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