Browsing by Author "Ling L.P."
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Publication Front-End Design for Non-Invasive Electrical Resistance Tomography for Liquid Column(Universiti Teknikal Malaysia Melaka, 2018) ;Wahab Y.A. ;Rahim R.A. ;Zawawi M.A. ;Rahiman M.H.F. ;Ling L.P. ;Jamaludin J. ;Goh H. ;Aw S.R. ;Rahim H.A. ;Faculty of Science and Technology ;Universiti Malaysia Pahang (UMP) ;Universiti Tun Hussein Onn (UTHM) ;Universiti Teknologi Malaysia (UTM) ;Universiti Malaysia Perlis (UniMAP) ;Universiti Sains Islam Malaysia (USIM)TATI University College (TATiUC)This paper explains the front-end design for noninvasive electrical resistance tomography. The electrical resistance tomography system presented in this paper uses high-frequency potential. In this design, the phase-shift demodulation (PSD) approach was eliminated and replaced by a peak detector circuit. The switching between transmitter/receiver and the transmitting channel was controlled by an analogue switch, MAX319 and demultiplexer, DG406, respectively. A microcontroller was applied to the data acquisition which eliminates the needs of a data acquisition system. Sensor readings of each receiver from each transmitter groups were tested experimentally, compared and analysed with simulation results. These experimental readings were compared with the sensors reading simulated from COMSOL Multiphysics software. As a result, the current values between 0-1mA from experiments was similar with the simulation results for all groups of transmitters. Thus, it can be concluded that the front-end design can be applied for the non-invasive ERT when high frequency is considered. � 2018 Universiti Teknikal Malaysia Melaka. All rights reserved. - Some of the metrics are blocked by yourconsent settings
Publication Introducing an application of a charged coupled device (CCD) in an optical tomography system(Penerbit UTM Press, 2015) ;Jamaludin J. ;Rahim R.A. ;Rahim H.A. ;Rahiman H.F. ;Muji S.Z.M. ;Fadzil N.S.M. ;Ling L.P. ;Jumaah F. ;Ahmad A. ;Ayob N.M.N. ;Hong L.E. ;Universiti Teknologi Malaysia (UTM) ;Universiti Malaysia Perlis (UniMAP) ;Universiti Tun Hussein Onn Malaysia (UTHM)Universiti Sains Islam Malaysia (USIM)A tomographic system is a method used for capturing an image of an internal object section. Optical tomography is one method which widely used in medical and industrial fields. This paper reviews several applications of Charged Coupled Devices (CCD) and introduces an application of a CCD in an optical tomography system. Most of the previous research used this component for displacement measurement and as a video camera. This paper discusses its basic principle of operation, basic construction, its criteria, application, and its advantages compared to other optoelectronic sensors available in today�s market. The applications of this sensor in fields such as astronomy and medical has proved the ability and the good performance of CCD in capturing images. This sensor should widen its usage in optical tomography fields because it can give high performance in image reconstruction. � 2015 Penerbit UTM Press. All rights reserved.