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Vol. 132, Issue 9, September 2011, pp.40-46




The Linearity of Optical Tomography: Sensor Model and Experimental Verification


1Siti Zarina MOHD. MUJI, 2Ruzairi ABDUL RAHIM, 3Mohd Hafiz FAZALUL RAHIMAN, 4Zulkarnay ZAKARIA,
5Elmy Johana MOHAMAD, 6Mohd Safirin KARIS

1Department of Computer Engineering, Faculty of Electrical and Electronic Engineering,
Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia

E-mail: szarina@uthm.edu.my, elmy@uthm.edu.my

2Process Tomography Research Group, Control & Instrumentation Engineering Department,

Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia

Tel.: +607-5537801

E-mail: ruzairi@fke.utm.my

3Tomography Imaging Research Group, School of Mechatronic Engineering,
Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia

E-mail: hafiz@unimap.edu.my, zulkarnay@unimap.edu.my


Received: 23 June 2011   /Accepted: 19 September 2011   /Published: 27 September 2011

Handbook of Laboaratory Measurements book


Abstract: The aim of this paper is to show the linearization of optical sensor. Linearity of the sensor response is a must in optical tomography application, which affects the tomogram result. Two types of testing are used namely, testing using voltage parameter and testing with time unit parameter. For the former, the testing is by measuring the voltage when the obstacle is placed between transmitter and receiver. The obstacle diameters are between 0.5 until 3 mm. The latter is also the same testing but the obstacle is bigger than the former which is 59.24 mm and the testing purpose is to measure the time unit spend for the ball when it cut the area of sensing circuit. Both results show a linear relation that proves the optical sensors is suitable for process tomography application.


Keywords: Optical sensor, Optical tomography, Linearity, Voltage, Time


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