Herlina Abdul Rahim

Universiti Teknologi Malaysia | UTM · Faculty of Electrical Engineering (FKE)

The non-invasive technique is one of the favourite methods applied in process plants, compared to other sensing techniques. Due to certain advantages, this technique is also implemented in process tomography such as in non-invasive ERT systems for multiphase mixtures. The purpose of this paper is to investigate the optimum size of the area of the e...

Image reconstruction software and its image reconstruction algorithm are an important step towards constructing a tomography system. This paper demonstrates an image reconstruction of solid profile using linear back projection (LBP) algorithm and global threshold. A forward problem and inverse problem are discussed. The modelled of sensitivity dist...

Water monitoring technologies are widely used for contaminants detection in wide variety of water ecology applications such as water treatment plant and water distribution system. A tremendous amount of research has been conducted over the past decades to develop robust and efficient techniques of contaminants detection with minimum operating cost...

An application of charge-coupled device (CCD) linear sensor and laser diode in an optical tomography (OPT) system is presented. The measurements are based on the final light intensity received by the sensor. The aim is to analyse and demonstrate the capability of laser with a CCD in an OPT system for detecting transparent objects in crystal clear w...

An image reconstruction algorithm in process tomography is very important in ensure that the reconstructed image is satisfied. The back-projection algorithm is the most popular algorithm applied in process tomography including a linear back-projection (LBP) algorithm and a filtered back-projection (FBP) algorithm. The objectives of this paper are:...

World Health Organization (WHO) stated in 2004, about 347 million people suffered from diabetes and from this statistic, about 3.4 million died from the complication of kidney failure, heart attack, body part amputation and adequately reported suffered from blindness. There are several non-invasive techniques in measuring the blood glucose level de...

This research presents an application of Charge Coupled Device (CCD) linear sensor and laser diode in an optical tomography system. These optoelectronic sensors are believed to detect solid objects rather than transparent objects. Based on the research results, the development of optical tomography system using Charge Coupled Device (CCD) and laser...

Near Infrared Spectroscopy (NIRS) has been applied as analytical tool in numerous field of study due to its ability in non-invasive application. NIRS with the ability in providing the information on biological molecules shows a high potential as a diagnosis tool in medical as diseased related to biochemistry changes of the cell and tissue. This pap...

Recently, the issues of air pollutants have become a major topic that is currently being debated among researchers and authority as it give negative impacts to the environment. This paper will discuss thoroughly on techniques that are currently being applied in monitoring air pollution. Techniques that are quite familiar in monitoring air pollution...

A non-destructive,fast, reliable and low cost technique which is Near-Infrared Spectroscopy (NIRS) is required to replace conventional destructive texture analyser in shear force measurement. The combination of visible and shortwave near infrared (VIS-SWNIR) spectrometer and principal component regression (PCR) to assess the quality attribute of ra...

In this paper we evaluated a single plane ultrasonic tomography sensor and performed some experimentation to reconstruct three-dimensional profiles in a chemical bubble column. An array of 32 ultrasonic sensors was constructed and clamped on the exterior circumference of the column. The information of the profiles was captured based on time-of-flig...

Near Infrared Spectroscopy (NIRs) has been applied as analytical tool in numerous field of study due to its ability in noninvasive application. This paper proposed a non-invasive method in early screening of leukemia using NIRS. In this method NIRs is applied directly at human fingertip for spectral data acquisition and standard blood test procedur...

Tenderness is one of the quality that will affect consumer perception in meat. Traditionally, meat quality grading was done destructively by the human graders destructive measurements. Destructive measurement caused less accurate results, time-consuming and costly. Hence, a low cost, fast, reliable and non-destructive technique which is Near-Infrar...

Previous research about the exposure of Mozart music and noise and the effects towards the feeding, growth rate and the stress level of the broilers were explored.Music has the ability to have a relaxing and antidepressant effect on humans, mammals and birds. Reports that music calms animals and improves productivity appear in commercial journals....

Simple experiment measuring diameter of a solid object (coin) using LED and laser diode with Charge Coupled Device (CCD) linear sensor was conducted in this early stage study. Mostly, CCD and laser diode system are higher in cost because CCD used in industries equipped with an anti blooming protection system to protect the CCD pixel from receiving...

The non-invasive sensing technique is one of the favourite sensing techniques applied in the process tomography because it has not a direct contact with the medium of interest. The objective of this paper is to analyse the simulation of the non-homogenous system of the non-invasive ERT using finite element software; COMSOL Multiphysics. In this sim...

This paper addresses a specific form of inspection, that of ultrasonic wave propagation in the ultrasonic tomographic imaging system. From the sensing configuration standpoint, ultrasound wave simulation is an important imaging process. From the simulation results, ultrasonic sensors with suitable centre frequency can be mounted spherically on a se...

The amylose content is an essential element in determining the texture and taste of rice grains. This paper evaluates the use of VIS-SWNIRS in estimating the amylose content for seven varieties of rice grains available in the Malaysian market. Each type consists of 30 samples and all the samples are scanned using the spectroscopy to obtain a range...

Non-invasive techniques are widely applied in process plants compared to other sensing techniques. Due to advantages such as preventing corrosion to the sensor and lengthening the sensor lifespan, this technique is also applied in process tomography such as in non-invasive ERT system. The purpose of this paper is to investigate the compatibility of...

Conventional methods previously guided reading meter to monitor the process and steps must be taken to interpret the readings and what need to adjustment be implemented. With the use of the method tomography, imaging process that displays the contents of the flow in the pipe or vessel during the process of giving analysts in real time quickly. By s...

Pipelines leakage is the main problem faced by industries. The main causes of leakage on pipelines are corrosion, crack and disaster. This problem must be detected early to ensure that maintenance work can be done quickly to prevent pipe bursts, as well as to minimize operational costs. The objective of this research is to review a method for early...

Thermoelectric energy (or power) harvester is a kind of renewable energy approach that extracts waste heat from targeted device or object to generate electrical power. It is an advance technology widespread among researchers for decades. By having plenty of promising advantages, the thermo-electric power harvester is being developed in types of fea...

This project improves on the existing manual herbicides tanks used by farmers at oil palm plantations. The main objective is to design and construct an automated machine that can facilitate the farmer's work of clearing grass at small scale oil palm plantations. In this project, a portable machine trolley which can be handled with ease was contruct...

The driver’s condition, which involves staying focus on the road, is the most important aspect to consider whenever one is driving. To ignore the importance of this could result in severe physical injuries, deaths and economic losses. Again, previous researches were focused mainly on the physical conditions of the driver; eg movement of head and dr...

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 researc...

This paper studies the solution for inverse and forward problems for an ultrasonic tomography. Transmission-mode approach has been used for sensing the liquid/gas two-phase flow, which is a kind of strongly inhomogeneous medium. The imaging technique for two-phase flow using fan-shaped beam scanning geometry was presented. In this work, the tomogra...

The inspection system is crucial to ensure the system is always in a good condition. A technique that can be used for inspection system is process tomography. By promising non-destructive approach; various types of process tomography applied in civil, manufacturing and electrical applications. The purpose of this paper is to review the types of pro...

Although the technique of using ultrasound has reached maturity by given the extent of the development of sensors, but the use of the various areas still can be explore. Many types of ultrasonic sensors are still at conventional in use especially for measurement equipment in the industry. With the advancement of signal processing techniques, high-s...

This research investigates the use of predictive models and a low cost spectroscopy in non-invasive Soluble Solids Content (SSC) assessment. The challenge is to model complex and high-dimensional spectral data. Results indicate that the SSC prediction of pineapples harvested on different days using the proposed approach is promising. The second stu...

Tomography is a method that has been used for image reconstruction in the medical and engineering fields. Optical tomography is one of the various methods applied in tomography systems. This tomography method is widely used in the medical and processing industries fields because of its special characteristics, such as immunity to electrical noise a...

By relating to the conventional PID and PID type fuzzy, an optimized PID type fuzzy controller and an optimized PID controller are designed for an inverted pendulum with two outputs. The optimized PID type fuzzy tunes its scaling factors on line. The optimization is done by imperialist competitive algorithm (ICA). The simulation results show a bett...

This paper details a work carried out to measure gas hold-up profiles in a liquid column using a pair of ultrasonic transducer. The gas hold-up profiles from 1.85 mm to 7.7 mm diameter are of interest in this investigation. The measurement setup consist of ultrasonic transducer, an experimental column, signal conditioning circuit, and a digital sto...

The visible/near-infrared (Vis/NIR) reflectance spectroscopy (680-1100 nm) has been applied to determine the meat texture prediction of raw chicken meat. The chicken breed; Az-Zain Organic Village chicken, Village chicken and Broiler chicken were used as the samples. Destructive measurement, Volodkevich bite jaws texture analyzer had been used to o...

This research investigated the use of predictive models and a low cost spectroscopy in non-invasive Soluble Solids Content (SSC) assessment. The challenge is to model complex and high-dimensional spectral data. Adaptive Linear Neuron (ADALINE) that uses a single layer network was proposed for modelling and variable selection in spectroscopic analys...

Purpose – Since the importance role of ultrasonic tomography (UT) in industry, especially in oil industry, to produce noninvasive and nondestructive plane images, research on UT system with a metal pipe conveyor is investigated. The produced cross-sectional images are used for detecting the concentration of solid and liquid mixture inside the pipe,...

Tomography is a method that has been used for image reconstruction in the medical and engineering fields. Optical tomography is one of the various methods applied in tomography systems. This tomography method is widely used in the medical and processing industries fields because of its special characteristics, such as immunity to electrical noise a...

Up to date methods and approaches in face identification field heavily depend on facial characteristics; such as location of eyes, length of nose and mouth. Ambient lightings have much influenced the visibility of these facial characteristics; where the visibility varies significantly with inconsistent external light source. In this paper, we prese...

Non-invasive ultrasonic tomography has a dominant role in extracting cross-sectional images of objects. The front-end structure of the proposed ultrasonic tomography system with a steel pipe conveyor is explained in this paper. In the novel ultrasonic tomography system presented, a non-invasive sensing technique is applied for detecting gas bubbles...

This paper propose an experiment to determine compatibility of near infrared (NIR) application in crude palm oil (CPO) quality measurement, considering only the Free Fatty Acid (FFA) that can be made as open source software. 100 samples were taken from Felda Johor Bulkers, Terminal 1 in 7 consecutive days of experiment. FFA reading from conventiona...

Nowadays there are several methods in assessing the traits of rice including destructive and non-destructive method. The objective of this study is to evaluate the amylose content (AC) on seven types of rice grain in Malaysian market by using the Near-Infrared (NIR) Spectroscopy. AC is one of the main criteria to determine the quality of cooked ric...

This paper discusses the receiver circuit and criteria for component selection towards the application of a real-time magnetic induction tomography system. Component selection plays an important role since image reconstruction of the object of interest with high quality and at a higher frame rate cannot be achieved without the right parameter crite...

Near-infrared (NIR) spectroscopy is a non-destructive, low cost and fast measurement technique that is required to improve the meat texture quality prediction. In this research, visible/NIR spectroscopy has been used for the prediction of raw chicken meat texture from different types of chickens by referring to the reference data obtained from dest...

Electrical capacitance tomography (ECT) is one of process tomography technique which is developed rapidly in recent years. ECT is an imaging technique to obtain the internal permittivity distribution of a vessel or pipe by using capacitance electrodes sensor. This method has been integrated with ultrasonic tomography as multimodality system to perf...

This paper reviews previous research on sensor arrays, projection arrangements and image reconstruction algorithms of optical tomography for industrial processes. These include the review of sensor selection and projection arrangement technique to optimize system performance. Issues on types of algorithm for image reconstruction purposes, which is...

Agriculture is the foundation of Malaysia’s economy in addition to other government-focused industries. The trend of its contribution to the gross domestic product (GDP) has fluctuated from year to year. The highest value was 28.8% in 1970; this reduced to 7.5% in 2007, rose slightly to 7.7% in 2009, and then decreased to 7.3% in 2010. However, the...

There are several methods in assessing the traits of rice including destructive and non-destructive method. The objective of this study is to evaluate the amylose content (AC) on seven types of rice grain in Malaysia market by using the Near-Infrared (NIR) Spectroscopy. AC is one of the main criteria to determine cooked rice quality. Total of sampl...

This paper propose an experiment to determine compatibility of near infrared (NIR) application in crude palm oil (CPO) quality measurement, considering only the Free Fatty Acid (FFA). 100 samples were taken from Felda Johor Bulkers, Terminal 1 in 7 consecutive days of experiment. FFA reading from conventional wet chemical analysis is used as the re...

This paper describes the metallic imaging results from magnetic induction tomography (MIT) hardware. Copper phantom, representing a high conductivity material, was placed into the measurement region of interest. The initial 16-channel MIT consists of eight excitation coils and eight receiving coils stacked alternately. The measurement was undertake...

Export Date: 10 September 2013, Source: Scopus

The Principal component regression (PCR) is a combination of principal component analysis (PCA) and multiple linear regression (MLR). The objective of this paper is to revise the use of PCR in shortwave near infrared (SWNIR) (750-1000nm) spectral analysis. The idea of PCR was explained mathematically and implemented in the non-destructive assessmen...

The number of visible (VIS) and shortwave near infrared (SWNIR) spectroscopic applications in fruit internal quality has grown rapidly in the last decade. Despite this widespread application, pre-processed spectral data used is often not well understood. The aims of this paper are (i) to compare the use of SWNIR and VIS–SWNIR spectral data, (ii) to...

In This paper a novel ultrasonic dispersion system for the cleaning application or dispersing of particles which are mixed in liquid, has been proposed. The frequency band of designed system is 28 kHz so that the frequency of ultrasonic wave sweeps from 20 kHz to 30 kHz with 100 Hz steps. Transferring a maximum and optimum energy of ultrasonic wave...

The needs of accurate information from tomography images has led to the exploration of 3D imaging which attracts both medical field and industrial process as 3D imaging technique provides additional info compared to 2D. The same thing goes to Magnetic Induction Tomography (MIT) even 3D is still new to this modality. The challenge of 3D scheme to MI...

Tomography is a process of imaging parameters in industrial applications. It can be based on different sensing methods; ultrasound and electrical impedance sensing methods are both sensitive to the particular characteristics of a material. These imaging methods have been shown to be practical instruments for process monitoring in the process indust...

Magnetic Induction Tomography (MIT) is a non-invasive and non-intrusive imaging technique which interested in passive electrical properties of a material that are permittivity, permeability and conductivity. MIT applies sinusoidal electromagnetic field generated by excitation coil. The electromagnetic signal propagates and then penetrates the mater...

Conference code: 95485, Export Date: 10 September 2013, Source: Scopus, doi: 10.4028/www.scientific.net/AMM.284-287.1099, Language of Original Document: English, Correspondence Address: Agos, M. F.; Institute of High Voltage and High Current, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia; email: fai...

This research was carried out to measure two-phase liquid - gas flow regime by using a dual functionality ultrasonic transducer. Comparing to the common separated transmitter-receiver ultrasonic pairs transducer, the dual functionality ultrasonic transceiver is capable to produce the same measurable results hence further improvises and contributes...

Ultrasonic Tomography has an important role in industry to produce scanned images for various propose. In this paper, producing the cross sectional images of pipe for detecting percentage of attendance of solid, liquid and gas inside the metal pipe has been investigated. The correct method of mounting of Ultrasonic sensors and behavior of the ultra...

Wireless sensor technologies are promising in the field of industrial tomography system, to visualize the cross-sectional images of an industrial flow process. The aim of the paper is to review the technical and scientific state of the art of wireless technologies, current trend of standards for wireless communications and their sensor applications...