Papers by Adedotun Owojori
Journal of Electrical Engineering, Electronics, Control and Computer Science, Jun 4, 2021
Automation over the years has found application in areas of automobiles, industrial machines and ... more Automation over the years has found application in areas of automobiles, industrial machines and some cases system conditioning. Nowadays home and building automation systems have been adopted to a greater extent as means of increasing comfort and achieving easy teleoperation tasks. These include energy management, water management, automatic opening and closing of access points or windows. This paper focuses on the design of an automatic sliding window system that responds to system command via a Bluetooth developed App on a mobile phone. The system uses Arduino as its controller and HC-05 Bluetooth module as a communication link between the controller and mobile application which was developed on MIT Ai2 platform. An ultrasonic sensor is been used to measure the distance of the sliding window to the edge of the wall by sending out and receiving pulses. A distance beyond or less than a threshold implies the system is closed or open and this can be adjusted according to the user's preference using the mobile application. This project involves processes like design, simulation, coding, fabrication and assembling procedures. The fabrication of the window would be of a quarter size compared to normal window size and the material used would be an acrylic glass having a wooden edge. For the control of the system, the stepper motor is connected to the driver which is interfaced with the Arduino PWM pins. The window is communicated to, through the Bluetooth module interfaced to the Arduino Uno to control the motor attached to the window.
Journal of Engineering Studies and Research, 2022
Power instability in Nigeria caused by overbearing demand of power by consumers and lack of prope... more Power instability in Nigeria caused by overbearing demand of power by consumers and lack of proper maintenance of the power system devices among others has brought about the need for alternative power sources such as generators, solar, typical inverters and other alternative supplies which requires one form of switching or the other to achieve phase selection during power failure. This paper gives a design analysis of an automatic phase selector linking available power supplies, that is; switching between a three-phase public utility supply, as a result of total power outage in the public supply to an alternative secondary supply (in this case a Generator and an Inverter system) and back when power is restored. The design adopts the use of a microcontroller-based system interconnected with other hardware components for proper isolation, switching and visualization of switching conditions. The system design is divided into two major part: the hardware which consists of the power supp...
Communications on Applied Electronics, 2015
Optimization of digital filter structure enhances its speed, reduces the filter length and filter... more Optimization of digital filter structure enhances its speed, reduces the filter length and filter coefficients which invariably lower the power consumption of the mobile devices. Reducing the filter operators as well as the coefficients reduces the filter redundancy. This improves the computational performance of the system in terms of memory utilization, bandwidth consumption and power usage. Farrow differential algorithm has improvement over the other existing algorithm such as farrow algorithm and differential algorithm. The algorithm was designed using Altera Digital Signal Processing tool box in MATLAB/ Simulink environment. When implemented it leads to reduction in the computational complexity, power consumption and silicon area. The decimation factor of 260 for a frequency range of 270.70 kHz was used. It also showed that a power gain of 83 dBm was observed as output for the poly-phase farrow differential algorithm compared to polyphase modified farrow with power level of 98dB and polyphase farrow algorithm with power rating of 140dB. Thus a remarkable lower power gain, lower complexity and lower power consumption in mobile system was obtained when compared to polyphase farrow polynomial algorithm and modified farrow algorithm.
Communications on Applied Electronics, 2015
Reduction in hardware complexities is vital in communication. The major contribution to hardware ... more Reduction in hardware complexities is vital in communication. The major contribution to hardware complexity in many technologies is the multiplier utilized. This work present a proposed algorithm based on Farrow differential polynomial interpolation. This interpolator filter is a time varying poly-phase filter that uses fractional delay to reduce the integer sampling rates to fractional rates. It is a novel polynomial interpolator with less multiplier usage and inherent linear phase low pass filter. The digitized intermediate frequency (IF) by ADC is derived from mixing the signal RF with a local oscillator signal of a given fixed/variable frequency. Digitization using an analog to digital converter (ADC) capable of running at a sampling time of greater or twice the IF with maximum dynamic range of 100 MHz [This is contrary to the direct down conversion of multiband RF to band pass signals where under sampling is used. The algorithm was designed using Altera Digital Signal Processing tool box in MATLAB/ Simulink environment. When implemented it leads to reduction in the computational complexity, power consumption and silicon area. It also showed that a power gain of-15 dBm was observed as output for the GSM channel when compared with the existing modified farrow algorithms which have power gain of-9.4dBm and farrow polynomial algorithms with power gain of 10.59dBm. The decimation factor of 260 for a frequency range of 270.70 kHz was used. Thus a remarkable lower power gain, lower complexity and lower power consumption in mobile system was obtained when compared to farrow polynomial algorithm and modified farrow algorithm.
Journal of Engineering Studies and Research
Intelligence incorporated in many devices makes it easier to achieve self-balancing and autonomou... more Intelligence incorporated in many devices makes it easier to achieve self-balancing and autonomous driving in differential drive robot. Basically, differential drive robotic system describes an unstable, nonlinear system related to an inverted pendulum. The research attempts to harness the parameters obtained from a computer-aided design tool (Solid works) to model the system for complete stability control and dynamic motion of the system within a planned trajectory. A linearized dynamic equation is obtained for the overall system design of a mobile robot, and the linear quadratic regulator concept is adopted to obtain an optimum state feedback gain. The simulation results are obtained on MATLAB software interfaced with an Arduino board with deployable sensor technologies. Scenarios of disturbance would be simulated to ascertain the stability conditions of the system at static position or dynamic position. Signal analysis and computer vision techniques serve as leverage to make the ...
This paper focused on the design of a digital front end channelizer useful in most software defin... more This paper focused on the design of a digital front end channelizer useful in most software defined radios with the aim of exploiting the vast resources of digital signal processing which helps to achieve a portable, long lasting with extraordinary computational complexity software application that is capable of running at a lower power budget. Three channelization algorithms: per-channel, pipeline frequency transform and poly-phase fast Fourier transform uniform channelization algorithms were reviewed and designed for FM receivers using Altera Digital Signal Processing tool box in MATLAB/Simulink environment. The performance evaluation of the three algorithms were carried out with the estimation of the multiplication per input samples of operation of the system, signal strength level or signal to noise ratio and the compilation time of each algorithm. The result showed that the polyphase fast Fourier transforms and pipeline frequency transform had 24 % decrease in computational req...
European Journal of Electrical Engineering and Computer Science, May 25, 2019
Optimization of digital filter structure enhances its speed, reduces the filter length and filter... more Optimization of digital filter structure enhances its speed, reduces the filter length and filter coefficients which invariably lower the power consumption of the mobile devices. Reducing the filter operators as well as the coefficients reduces the filter redundancy. This improves the computational performance of the system in terms of memory utilization, bandwidth consumption and power usage. Farrow differential algorithm has improvement over the other existing algorithm such as farrow algorithm and differential algorithm. The algorithm was designed using Altera Digital Signal Processing tool box in MATLAB/ Simulink environment. When implemented it leads to reduction in the computational complexity, power consumption and silicon area. The decimation factor of 260 for a frequency range of 270.70 kHz was used. It also showed that a power gain of 83 dBm was observed as output for the poly-phase farrow differential algorithm compared to polyphase modified farrow with power level of 98dB and polyphase farrow algorithm with power rating of 140dB. Thus a remarkable lower power gain, lower complexity and lower power consumption in mobile system was obtained when compared to polyphase farrow polynomial algorithm and modified farrow algorithm.
Out of seven billion of the world’s population, two billion and two million that amounts to 31.43... more Out of seven billion of the world’s population, two billion and two million that amounts to 31.43% have visual impairment or blindness according to the World Health Organization (WHO) statistics report. Hence, the need to develop a wearable device with reduced size, efficient power usage, and for more comfortability of the visually impaired or blind people. This work aims at designing an obstacle detection system using an ultrasonic sensor interfaced with an Arduino board to track location, alert patient, and send location messages of visually impaired patient to guardians as a feedback mechanism using a GPRS and GSM module. The C programming language was used as the instruction code to interface Arduino device to carry out given tasks. At the design level, the circuit was first tested on Proteus software for simulation purposes before its hardware implementation. The results obtained from the test show the variation of distance as the patient approaches the obstacle, and messages r...
”. Journal of Electrical Engineering, Electronics, Control and Computer Science (JEEECCS), 2021
Automation over the years has found application in areas of automobiles, industrial machines and ... more Automation over the years has found application in areas of automobiles, industrial machines and some cases system conditioning. Nowadays home and building automation systems have been adopted to a greater extent as means of increasing comfort and achieving easy teleoperation tasks. These include energy management, water management, automatic opening and closing of access points or windows. This paper focuses on the design of an automatic sliding window system that responds to system command via a Bluetooth developed App on a mobile phone. The system uses Arduino as its controller and HC-05 Bluetooth module as a communication link between the controller and mobile application which was developed on MIT Ai2 platform. An ultrasonic sensor is been used to measure the distance of the sliding window to the edge of the wall by sending out and receiving pulses. A distance beyond or less than a threshold implies the system is closed or open and this can be adjusted according to the user's preference using the mobile application. This project involves processes like design, simulation, coding, fabrication and assembling procedures. The fabrication of the window would be of a quarter size compared to normal window size and the material used would be an acrylic glass having a wooden edge. For the control of the system, the stepper motor is connected to the driver which is interfaced with the Arduino PWM pins. The window is communicated to, through the Bluetooth module interfaced to the Arduino Uno to control the motor attached to the window.
European Journal of Electrical Engineering and Computer Science (EJECE), 2021
Out of seven billion of the world's population, two billion and two million that amounts to 31.43... more Out of seven billion of the world's population, two billion and two million that amounts to 31.43% have visual impairment or blindness according to the World Health Organization (WHO) statistics report. Hence, the need to develop a wearable device with reduced size, efficient power usage, and for more comfortability of the visually impaired or blind people. This work aims at designing an obstacle detection system using an ultrasonic sensor interfaced with an Arduino board to track location, alert patient, and send location messages of visually impaired patient to guardians as a feedback mechanism using a GPRS and GSM module. The C programming language was used as the instruction code to interface Arduino device to carry out given tasks. At the design level, the circuit was first tested on Proteus software for simulation purposes before its hardware implementation. The results obtained from the test show the variation of distance as the patient approaches the obstacle, and messages received when a fix was obtained. This design concept would help reduce danger across the way of those with sight defects and allow them to go to familiar places without any aid smoothly.
Communications on Applied Electronics, Apr 25, 2015
This paper focused on the design of a digital front end channelizer useful in most software defin... more This paper focused on the design of a digital front end channelizer useful in most software defined radios with the aim of exploiting the vast resources of digital signal processing which helps to achieve a portable, long lasting with extraordinary computational complexity software application that is capable of running at a lower power budget. Three channelization algorithms: per-channel, pipeline frequency transform and poly-phase fast Fourier transform uniform channelization algorithms were reviewed and designed for FM receivers using Altera Digital Signal Processing tool box in MATLAB/Simulink environment. The performance evaluation of the three algorithms were carried out with the estimation of the multiplication per input samples of operation of the system, signal strength level or signal to noise ratio and the compilation time of each algorithm. The result showed that the polyphase fast Fourier transforms and pipeline frequency transform had 24% decrease in computational requirement compared to per-channel which suggest a lower power consumption. Whereas, polyphase fast Fourier transform out performs pipeline frequency transform in terms of silicon cost.
Conference Presentations by Adedotun Owojori
16th international Conference of Constructive Design and Technological Optimization in Machine Building Field, OPROTEH 2021, 2021
Power instability in Nigeria caused by overbearing demand of power by consumers and lack of prope... more Power instability in Nigeria caused by overbearing demand of power by consumers and lack of proper maintenance of the power system devices among others has brought about the need for alternative power sources such as generators, solar, typical inverters and other alternative supplies which requires one form of switching or the other to achieve phase selection during power failure. This paper gives a design analysis of an automatic phase selector linking available power supplies, that is; switching between a three-phase public utility supply, as a result of total power outage in the public supply to an alternative secondary supply (in this case a Generator and an Inverter system) and back when power is restored. The design adopts the use of a microcontroller-based system interconnected with other hardware components for proper isolation, switching and visualization of switching conditions. The system design is divided into two major part: the hardware which consists of the power supply, sensing circuit, controller or control logic circuit, display and the power electronics switching unit and the software instruction code on the microcontroller unit. The design analysis was first carried out accompanied with computer simulation on a software tool (Proteus 8 Professional, version 8.4) to carry out performance evaluation of the sub-circuits, thereafter, a practical implementation of the design was carried out and tested with the utility power supply using five (5) switches, three of which represents the three-phase primary supply and the other two represents the secondary supply.
16th international Conference of Constructive Design and Technological Optimization in Machine Building Field, OPROTEH 2021, 2021
Intelligence incorporated in many devices makes it easier to achieve self-balancing and autonomou... more Intelligence incorporated in many devices makes it easier to achieve self-balancing and autonomous driving in differential drive robot. Basically, differential drive robotic system describes an unstable, nonlinear system related to an inverted pendulum. The research attempts to harness the parameters obtained from a computer-aided design tool (Solid works) to model the system for complete stability control and dynamic motion of the system within a planned trajectory. A linearized dynamic equation is obtained for the overall system design of a mobile robot, and the linear quadratic regulator concept is adopted to obtain an optimum state feedback gain. The simulation results are obtained on MATLAB software interfaced with an Arduino board with deployable sensor technologies. Scenarios of disturbance would be simulated to ascertain the stability conditions of the system at static position or dynamic position. Signal analysis and computer vision techniques serve as leverage to make the design achievable. Localization and navigation referred to as tracking a planned trajectory or moving through paths filled with obstacles in a given space are also included.
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Papers by Adedotun Owojori
Conference Presentations by Adedotun Owojori