M.F.A. Rahman

M.F.A. Rahman
Universiti Teknologi Mara (Pulau Pinang) · Faculty of Electrical Engineering

Doctor of Philosophy (Sensors & Instrumentation),MSc (Electronic System Design Engineering)

About

36
Publications
3,121
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101
Citations
Citations since 2016
15 Research Items
83 Citations
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201620172018201920202021202205101520
201620172018201920202021202205101520

Publications

Publications (36)
Article
Full-text available
Water quality prediction is aided by environmental monitoring, ecological sustainability, and aquaculture. Traditional prediction approaches capture the nonlinearity and non-stationarity of water quality well. Due to their rapid progress, artificial neural networks (ANNs) have become a hotspot in water quality prediction in recent years. ANNs are u...
Article
Piezoelectric energy harvesting is the process of extracting electrical energy using energy harvester devices. Any stress in the piezoelectric material will generate induced voltage. Previous energy harvester device with stiff cantilever beam was generated low harvested energy. A flexural piezoelectric energy harvester is proposed to improve the ge...
Article
Full-text available
p>This paper proposed an optical pH measurement system developed to measure the changes of pH levels based on colorimetric reactions with phenol red reagent. The optical sensing was achieved through the implementation of a pair of light emitting diode (LED) and photodiode. The detection mechanism was based on different absorbance of light intensity...
Article
Full-text available
Aerospace Composites Malaysia (ACM) Sdn Bhd produces one of the aircraft components, which is an aircraft composite panel. Currently, the painting of the composite aircraft panel is manually conducted by the high skilled human operator. However, there are several issues of manual painting, which are the precision of the thickness specifications, un...
Article
Full-text available
In acoustic receiver design, the receiving sensitivity and bandwidth are two primary parameters that determine the performance of a device. The trade-off between sensitivity and bandwidth makes the design very challenging, meaning it needs to be fine-tuned to suit specific applications. The ability to design a PMUT with high receiving sensitivity a...
Article
Full-text available
Non-structural protein 1 (NS1 protein) is becoming a commonplace biomarker for the diagnostic of early detection of dengue. In this study, we sought to use a label-free approach of detecting NS1 protein by harnessing fluidic-based memristor sensor. The sensor was fabricated using sol-gel spin coating technique, by which TiO2 thin film is coated on...
Conference Paper
Micromachined ultrasonic transducer has been used in many application for example non-destructive test, medical diagnostic and underwater application. One of the underwater application is underwater acoustic imaging system. Underwater acoustic imaging system needs a transducer with wide bandwidth to perform high resolution image. In previous paper,...
Article
This paper presents the development of a novel one-side-electrode-type fluidic-based capacitive pressure sensor. A pressure sensor using a one-side-electrode and an implementation of electrical double layer capacitance concept was proposed. Mechanical analysis of the membrane was carried out using the finite-element analysis in terms of deflection...
Article
This paper reported the characterization study on a new type of acoustic microsensor meant for immersion or underwater application. The new proposed device is based on microfluidic technology that is found to be able to overcome the fabrication issues associated with conventional capacitive micromachined ultrasonic transducer device. The design par...
Conference Paper
This paper demonstrates the experiment for the capacitive pressure sensor for the fluid mechanism and effects of liquid to the sensor performance. The sensor using one side electrode was proposed with the implementation of electrical double layer capacitor. The sensor consisted of membrane and microchannel where it was fabricated using PDMS materia...
Conference Paper
This work proposes a new concept of underwater acoustic capacitive sensor that operates based on the microfluidic mechanism. The main structures consist of a membrane, microchannel and coplanar detecting electrodes. The new sensor device is proposed to avoid the process complexity and facilities limitation during fabrication of the existing acousti...
Article
This work aims to obtain the capacitance resulted from the coplanar electrode configuration meant to be used for underwater sensing application. Coplanar structure is proposed to overcome the complexity of parallel electrode microfabrication processes which require repeating process of layer deposition. Work is achieved through Finite Element Model...
Conference Paper
This paper presents the novel fluidic based capacitive pressure sensor. The electrical double layer capacitor (EDLC) concept was applied as a sensing method. The methanol was selected as an electrolyte due to its liquid properties such as low surface tension and dielectric permittivity. The circular membrane and microchannel were fabricated using P...
Conference Paper
This paper presents the development of the novel fluidic based one side electrode pressure sensor. The structure of the sensor consists of container and an electrode. For the container, the membrane and microchannel were combined in one structure. Meanwhile, the design of the electrode was extended from the pattern of coplanar electrode based on th...
Conference Paper
This work aims to validate the 2D Finite Element Model (FEM) for estimating the capacitance changes across a microchannel with coplanar electrodes configuration employed. Such electrodes configuration becomes popular in microfluidic-based application where the sensing activity occurs inside a microchannel. ANSYS 12.1 is used to built the 2D model o...
Article
Full-text available
This work studied the flow behaviour of microfluidic-based acoustic sensor at a region where the flow of fluid was considered to be significant in determining the overall flow behaviour of the system flow in microchannel. The study was carried out based on finite element model (FEM) using ANSYS multiphysics package. Two structural parameters, reser...
Conference Paper
Full-text available
A programmable pulse forming network (PFN) was utilized to provide customize pulse duration to the reference projector used for underwater calibration of piezoelectric micromachined ultrasonic transducer (pMUT). PIC16F84A and PIC16F877A microcontrollers were employed to drive three reference projectors at 2,3,4,5 and 6 pulses within 25 kHz to 1.5 M...
Article
An effort to enhance receiving response of piezoelectric micromachined ultrasonic transducers (pMUT) at low frequency was reported. PMUTs were fabricated with the vibrating membrane formed by a layer of polydimethylsiloxane (PDMS) polymer. Lead zirconate titanate, Pd (Zt,Ti)O-3 (PZT) was utilized as the piezo-active layer, sputtered with nickel ele...
Conference Paper
Full-text available
An effort to enhance receiving response of piezoelectric micromachined ultrasonic transducer (pMUT) at low frequency is reported. PMUT is fabricated on the glass substrate with the vibrating membrane formed by a layer of polydimethylsiloxane (PDMS) polymer. Lead zirconate titanate, Pb(Zr,Ti)O 3 (PZT) is utilized as the piezo-active layer and nickel...
Conference Paper
Full-text available
This work studied the behaviour material candidates to be used as liquid for a acoustic sensor. These liquid will be used as an the capacitive sensing mechanism is adopted. A simulate the laminar flow of these materials From the simulation, flow characteristics distribution, velocity profile and flow respon Pressure distribution plot exposed the ma...
Article
Full-text available
The vastness of the ocean offers great challenges for various underwater exploratory and communication related applications using multiple robotic platforms such as remotely operated vehicle (ROV), underwater glider, vertical profiler and autonomous surface vessel (ASV). Small in size, higher sensitivities and lower power consumptions of micro-ultr...
Article
An effort to enhance receiving response of piezoelectric micromachined ultrasonic transducers (pMUT) at low frequency was reported. PMUTs were fabricated with the vibrating membrane formed by a layer of polydimethylsiloxane (PDMS) polymer. Lead zirconate titanate, Pd (Zt, Ti)O3 (PZT) was utilized as the piezo-active layer, sputtered with nickel ele...
Article
Present study consists the behaviour of Polydimethylsiloxane (PDMS) as a vibrating membrane for acoustic signal detection application. Modelling and simulation work was performed using ANSYS 12. 1. Theory of acoustic impedance showed that PDMS acting as an acoustic membrane is acoustically matched when operated in water rather than air with 96. 7%...
Article
This work investigates the performance of two different liquid materials, i.e. Propylene Carbonate and Methanol to be used in microfluidic-based acoustic sensor. Both liquids were selected based on several important liquid properties including surface tension and permittivity. By using these materials as the fluid element, the damping effect and fl...
Conference Paper
Full-text available
Wafer bonding using polymer adhesive layer has gained many attentions for various MEMS applications. Numerous techniques and processes that utilize polymer adhesive have been established recently, mainly for device packaging. However, adhesive layer contribution in vibrating micro structure such as micro ultrasonic transducer requires further inves...
Conference Paper
Full-text available
This paper reports the initial investigation on a novel acoustic sensor design based on micro fluidic technology. The report includes the proposed design structure and the simulation of key structure materials that affect the performance of such sensor. Simulation works included the analysis of acoustic response of the membrane and the damping effe...

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