Enalume Kingsley | Federal University of Petroleum resources Effurun (original) (raw)

Papers by Enalume Kingsley

Journal of Engineering Studies and Research

Antennas used for tyre pressure monitoring systems are usually enclosed by the tyre. On its own, ... more Antennas used for tyre pressure monitoring systems are usually enclosed by the tyre. On its own, the antenna may have excellent properties. However, the wheel and tyre may have an impact on the performance of the antenna. This paper investigated the performance of a simple 2.4 GHz whip antenna for a tyre pressure monitoring system. The antenna was modelled using HFSS, while the wheel and tyre were modelled using SolidWorks. The wheel and tyre can have an impact on the antenna performance. The reflection coefficients, VSWR, gain and radiation pattern were determined through simulations, using HFSS. The antenna operation was checked at different positions and configurations to the wheel to determine its’ optimum position for effective signal radiation. The four different configurations were: antenna grounded to the middle of the rim, antenna ungrounded to the wheel’s edge, antenna grounded to the wheel’s edge, and antenna grounded to the wheel’s edge enclosed by the tyre. The result s...

Liquefied petroleum gas (LPG) has become a very common source of cooking fuel at home. However, L... more Liquefied petroleum gas (LPG) has become a very common source of cooking fuel at home. However, LPG leakage poses a serious threat to the user and others. To avert the danger associated with the use of LPG at home, this system was developed so that gas leakage can be quickly detected and notification of the user is immediately carried out. A GSM module is used to send SMS to the user if gas leakage is detected and the status is displayed on an LCD. The PIC18F2520 microcontroller carries out all the processing of the signal received from the MQ6 gas sensor and activate the GSM module and LCD to inform the user. To make the system very efficient it was configured to detect gas leakage at 250ppm which is far less than the standard 1000ppm and it was designed to be powered by the mains and from rechargeable battery. Test result carried out on the system were satisfactory indicating that it can be successfully deployed for domestic use.

IntroductionThe willingness of Africa’s population to take the COVID-19 vaccines is critical to t... more IntroductionThe willingness of Africa’s population to take the COVID-19 vaccines is critical to the efficiency of national immunisation programmes. This study surveys the views of adult African inhabitants toward vaccination and the possibility of participating or not participating in governments’ efforts to get citizens vaccinated.MethodA cross-sectional online survey of adult Africans was undertaken from December 2020 to March 2021. Responses were anonymised. The Pearson Chi-square test was performed to determine whether or not there were any variations in knowledge, awareness, perception and acceptance of the COVID-19 vaccines among the participants. Binomial logistic regression was used to evaluate the factors associated with willingness to accept COVID-19 vaccines and participate in immunisation programmes.ResultsThe results indicate that COVID-19 vaccines are more likely to be used by adult Africans over the age of 18 who are largely technologically savvy (55 percent) if the v...

Uninterruptible power supply still remains a mirage in Nigeria. It is grossly inadequate for a po... more Uninterruptible power supply still remains a mirage in Nigeria. It is grossly inadequate for a population of over 190 million [1] to depend on less than 5000 Megawatt of electricity supply. Electricity from the national grid cannot provide the minimum acceptable international standards for electricity availability and stability [2]. Apart from inadequate generation, there are other issues that affects the availability of stable power supply in Nigeria, ranging from transmission line faults [3, 4] to faults in the distribution system [5, 6]. There are several types of faults in the distribution system. However, faults associated with the distribution transformer are a major source of downtime in power supply. Some of these faults are phase fault such as single phase to ground fault, two phase to ground fault, phase to phase fault, three phase fault [5, 7, 8]. In order to guarantee stable power supply, distribution transformer should be monitored continuously. Some of the parameters that can be monitored are load currents, under-voltage, overvoltage, oil level, oil aging, overload, frequency, winding temperature and ambient temperature [9, 10, 11]. Currently in Nigeria, distribution transformer monitoring system is done offline, mainly by inspection or by the residents in the area reporting a fault to the utility provider [12, 13, 14]. This often leads to power outage for a long time, since detection is not automated and response may be slow. However, with current technologies especially in the area of telecommunications, it is possible to monitor distribution transformers on real time basis using any of the available technologies, reporting incidences immediately and protecting the transformer from further damage. There are various types of technologies/systems used for online transformer diagnosis such as Supervisory control and data acquiring (SCADA) systems [14], Radio frequency (RF) based control system [11], Distributed control systems [15], Internet based communications [10, 11], WCDMA [16], GSM [9, 13], ZIGBEE [14, 17] and wireless sensor networks (WSN) [4]. Several works have been done in the area of monitoring distribution transformers for the purpose of increasing the lifespan of the transformer and ensuring stable power supply. One of such system is Desai and Hasabe where voltage, current and temperature sensors were installed on the distribution transformers to monitor the coresponding parameters. The system sends an SMS to a designated number if an abnormality is detected

This paper presents the development and implementation of a Biometric Based Door Lock System that... more This paper presents the development and implementation of a Biometric Based Door Lock System that will automatically unlock a door when a registered fingerprint is sensed. The method employed in accomplishing this involves the use of a fingerprint scannerR305 interfaced with ATMEGA 328 Arduino microcontroller to actuate the locking and unlocking process of a door. Once a registered finger print is placed on the sensor, access is granted to the user, the door slides open and it closes after five seconds. During this process, the16x2 Liquid Crystal Display (LCD) displays the name of the individual with the registered fingerprint. If an unregistered fingerprint is sensed, access is denied. The developed Biometric Based Door Lock System was tested and it functioned in line with the desired objectives.

2012 IEEE 12th International Conference on Bioinformatics & Bioengineering (BIBE), 2012

Free jejunum flaps have been widely used as a reconstruction option after total laryngopharyngect... more Free jejunum flaps have been widely used as a reconstruction option after total laryngopharyngectomy. Monitoring of flap perfusion assists in early detection of flap failure, increasing the possibility of flap salvage. Considering the free jejunum flap is a hidden flap there is still no single reliable, non invasive perfusion monitoring technique to assist in recognizing flap failure. We have developed a dualwavelength photoplethysmographic (PPG) sensor and processing system to investigate the ability of the system in detecting flap perfusion. This is a case report of evaluation of the new prototype reflectance PPG sensor on one patient undergoing total laryngopharyngectomy and reconstruction with a free jejunum flap. PPG signals were successfully obtained intra-operatively which suggest that photoplethysmography may be a suitable method for assessing free jejunum flap perfusion.

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 2014

In home appliances and in small scale industries, single phase induction motors are commonly used... more In home appliances and in small scale industries, single phase induction motors are commonly used. Recently remarkable efforts have been made in adjustable speed-single phase induction motor drives (SPIMD's). Different types of PWM strategies have been used in speed control of SPIMD's, most widely sinusoidal PWM & space vector PWM strategies. Various converters technologies are taking a place in SPIMD's because of its low cost. The proposed project describes the several PWM strategies with an AC chopper to control the speed of single phase induction motor. Asymmetrical PWM technique has been used to operate the power electronics switches (IGBT) of an AC chopper. The main objective of this project is to maintain the speed of the single phase induction motor constant at different load conditions by using Asymmetrical PWM technique, which reduces the harmonic contents in motor current and increasing the motor efficiency. The simulation is carried out in MATLAB/SIMULINK with a Split Phase Induction Motor, where the motor is operated in normal PWM strategy, Hysteresis PWM strategy. The hardware is designed for the Asymmetrical PWM technique and results have been discussed.

Introduction The willingness of Africa's population to patronise the COVID-19 vaccines is critica... more Introduction The willingness of Africa's population to patronise the COVID-19 vaccines is critical to the efficiency of national immunisation programmes. This study surveys the views of adult African inhabitants toward vaccination and the possibility of participating or not participating in governments' efforts to get citizens vaccinated. Method A cross-sectional online survey of adult Africans was undertaken from December 2020 to March 2021. Responses were anonymised. The Pearson Chi-square test was performed to determine whether or not there were any variations in knowledge, awareness, perception and acceptance of the COVID-19 vaccines among the participants. Binomial logistic regression was used to evaluate the factors associated with willingness to accept the COVID-19 vaccines and participate in immunisation programmes.

International Journal Of Advanced Research in Engineering & Management (IJAREM), 2017

This paper present a system of monitoring the phase of distribution transformers to determine if ... more This paper present a system of monitoring the phase of distribution transformers to determine if the Johnson & Phillips (J&P) fuse is blown or not. Blown fuses are common with distribution transformers to protect the transformer itself from being faulty. When a phase is overloaded the fuse gives way to protect the transformer. However, this fault should be promptly reported and localized so that power can be quickly restored to the phase. It was against this backdrop that this system was developed. It checks the phase of the transformer, with particular reference to the fuse of each phase to determine whether it is open or closed. If the system detects a blown fuse, the PIC18F4585 microcontroller will activate the buzzer and the SIM900A GSM module, to send a pre-programmed message indicating the location of the fault to the utility provider. The state of the blown fuse detector circuit will also be displayed on the LCD. Thus reducing the downtime that is associated with such faults from the manual system of reporting currently practised in Nigeria. The circuit was constructed and tested by putting OFF the switch used to represent each phase of the distribution transformer feeder-pillar. When the switch was in the OFF state, the buzzer came up and an SMS was sent to the electricity distribution company to notify them of a failed phase in the distribution
transformer feeder-pillar.

This paper presents a method for users to control their home and office appliances remotely using... more This paper presents a method for users to control their home and office appliances remotely using a mobile phone. This is borne out of the desire to minimise accidents and prevent damage to electrical appliances as a result of not switching off electrical appliances such as pressing iron, electric heater, etc, which can result in fire incidence and damage. The system provides the ease of turning on/off electrical appliances with its attendant safety. The access control is achieved by sending a DTMF code from the user mobile phone to the device mobile phone receiver. The received DTMF code is then decoded by the DTMF decoder which interfaces with a PIC Microcontroller to process the signal and control the appliance with the aid of a relay. The switching system presented in this paper will enable the switching of electrical appliances with AC load of 220V±5% supply from a mobile phone by simply issuing a command through the phone's keypad to the system. This saves time used in switching ON or OFF the electrical appliances manually since the electrical appliance can be controlled from this remote system.

Induction motor is a constant speed machine when operated from the mains. However it is necessary... more Induction motor is a constant speed machine when operated from the mains. However it is necessary to vary the speed of the motor in some applications. The speed of a motor basically depends on the supply frequency and number of poles. While the frequency can easily be changed without changing the entire structure of the motor, the same cannot be said for the number of poles. This paper examines the use of cycloconverters to vary the speed of single phase induction motors. Cycloconverters work on changing the supply frequency to vary the speed of the motor. With the aid of three push buttons connected to the microcontroller and the program written on it, the speed of the motor was varied in three steps, at F, F/2 & F/3. The microcontroller sends the gating pulse through an optocoupler to trigger the thyristors in a dual bridge providing the alternating signal needed to drive the motor. As the frequency decreases, the speed of the motor also decreases. The cycloconverter was used on a single phase induction motor and the result shows that it can vary the speed of an induction motor.

Antennas used for tyre pressure monitoring systems are usually enclosed by the tyre. On its own, ... more Antennas used for tyre pressure monitoring systems are usually enclosed by the tyre. On its own, the antenna may have excellent properties. However, the wheel and tyre may have an impact on the performance of the antenna. This paper investigated the performance of a simple 2.4 GHz whip antenna for a tyre pressure monitoring system. The antenna was modelled using HFSS, while the wheel and tyre were modelled using SolidWorks. The wheel and tyre can have an impact on the antenna performance. The reflection coefficients, VSWR, gain and radiation pattern were determined through simulations, using HFSS. The antenna operation was checked at different positions and configurations to the wheel to determine its' optimum position for effective signal radiation. The four different configurations were: antenna grounded to the middle of the rim, antenna ungrounded to the wheel's edge, antenna grounded to the wheel's edge, and antenna grounded to the wheel's edge enclosed by the tyre. The result shows that electrically grounding the antenna to the wheel by the edge improves its performance. Also, the tyre did not negatively impact the far-field gain of the antenna.

This paper presents a method for users to monitor their heart rate conveniently. It becomes neces... more This paper presents a method for users to monitor their heart rate conveniently. It becomes necessary for individuals to know their heart rate because of the fact that cardiovascular disease is the leading cause of death in the world, especially in developing countries. Heart rate measurement is an indication of how healthy the heart is. This heart rate monitor (HRM) uses the technique of reflectance photoplethysmography (PPG) to detect the pulse from the fingertip, filter and amplify the pulse using two-stage OP-Amp, count and decodes the pulse with the aid of a microcontroller and display the output in beats per minutes (BPM) on an LCD. The device is easy to use, cheap and portable compared to the expensive ones available that also requires medical expertise. It can be used by athletes and anybody to monitor the state of their heart rate with negligible error.

This paper presents the performance analysis of a quarter-wave monopole antenna radiating at a fr... more This paper presents the performance analysis of a quarter-wave monopole antenna radiating at a frequency of 2.4 GHz. Two antenna models were proposed. The whip monopole antenna (WMA) at length l-equal to / 4 λ , and the improved whip monopole antenna (IWMA) at a length l slightly less than / 4 λ. To get the IWMA, the length of the antenna was gradually reduced by a factor of 0.25 mm until the optimum length of the antenna was achieved. The antennas were modelled and analyzed using a 3D electromagnetic solver known as HFSS. Simulation results show that the IWMA has excellent performance over the WMA. The WMA resonated at 2.3 GHz, with a reflection coefficient of-12.36 dB, a VSWR of 1.65, an impedance bandwidth of 2.17-2.47 GHz and a gain of 5.9 dB. But by slightly reducing the length of the monopole antenna, the IWMA resonated at 2.4 GHz. The reflection coefficient of the IWMA was 1.99 dB better than the WMA. The IWMA had a wider impedance bandwidth than the WMA. It was only in the antenna gain that the WMA was better. The IWMA can function as a tyre pressure monitoring system (TPMS) antenna because it is compact and have excellent antenna parameters.

American Journal of Embedded Systems and Applications

Journal of Engineering Studies and Research

2012 IEEE 12th International Conference on Bioinformatics & Bioengineering (BIBE), 2012

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 2014

International Journal Of Advanced Research in Engineering & Management (IJAREM), 2017

Antennas used for tyre pressure monitoring systems are usually enclosed by the tyre. On its own, ... more Antennas used for tyre pressure monitoring systems are usually enclosed by the tyre. On its own, the antenna may have excellent properties. However, the wheel and tyre may have an impact on the performance of the antenna. This paper investigated the performance of a simple 2.4 GHz whip antenna for a tyre pressure monitoring system. The antenna was modelled using HFSS, while the wheel and tyre were modelled using SolidWorks. The wheel and tyre can have an impact on the antenna performance. The reflection coefficients, VSWR, gain and radiation pattern were determined through simulations, using HFSS. The antenna operation was checked at different positions and configurations to the wheel to determine its' optimum position for effective signal radiation. The four different configurations were: antenna grounded to the middle of the rim, antenna ungrounded to the wheel's edge, antenna grounded to the wheel's edge, and antenna grounded to the wheel's edge enclosed by the tyre. The result shows that electrically grounding the antenna to the wheel by the edge improves its performance. Also, the tyre did not negatively impact the far-field gain of the antenna.

American Journal of Embedded Systems and Applications