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Vol. 120, Issue 9, September 2010, pp.62-69

 

Bullet

 

Optical Tomography System: Charge-coupled Device Linear Image Sensors

 

1M. Idroas, 2R. Abdul Rahim, 3M. H. Fazalul Rahiman, 4R. G. Green, 2M. N. Ibrahim

1Faculty of Chemical and Natural Resources Engineering, Universiti Teknologi Malaysia,

81310 Skudai, Johor, Malaysia

2Faculty of Electrical Engineering, Universiti Teknologi Malaysia,

81310 Skudai, Johor, Malaysia

3School of Mechatronic Engineering, Universiti Malaysia Perlis,

02600 Arau, Perlis, Malaysia

4School of Engineering, Sheffield Hallam University, Sheffield, United Kingdom

E-mail: mariani@fkkksa.utm.my

 

 

Received: 12 August 2010   /Accepted: 14 September 2010   /Published: 27 September 2010

 

Abstract: This paper discussed an optical tomography system based on charge-coupled device (CCD) linear image sensors. The developed system consists of a lighting system, a measurement section and a data acquisition system. Four CCD linear image sensors are configured around a flow pipe with an octagonal-shaped measurement section, for a four projections system. The four CCD linear image sensors consisting of 2048 pixels with a pixel size of 14 micron by 14 micron are used to produce a high-resolution system. A simple optical model is mapped into the systemís sensitivity matrix to relate the optical attenuation due to variations of optical density within the measurement section. A reconstructed tomographic image is produced based on the model using MATLAB software. The designed instrumentation system is calibrated and tested through different particle size measurements from different projections.

 

Keywords: Bubbles velocity, Optical tomography, Inverse algorithm

 

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