2013 International Conference on Informatics, Electronics and Vision (ICIEV), 2013
A Microcontroller based power factor correction (PFC) converter is proposed, which is not affecte... more A Microcontroller based power factor correction (PFC) converter is proposed, which is not affected by harmonic distortion in current and voltage wave shapes. This paper describes the design and simulation of a single-phase PFC converter using Atmel's AVR Microcontroller. It involves sensing and measuring the power factor from the load using ADC; implementing faster algorithm to process the data using discrete time filter which requires least amount of memory; and triggering appropriate capacitors in order to compensate the excessive reactive components. A power factor near to unity is thus achieved, which results higher efficiency and low-THD AC output. A provision for measuring the power is also discussed.
8th International Conference on Electrical and Computer Engineering, 2014
A computationally fast visual approach of autonomous robot localization with high degree of accur... more A computationally fast visual approach of autonomous robot localization with high degree of accuracy is demonstrated. Relative position and orientation of an autonomous robot with respect to a fixed reference point is determined by minimal processing of a monocular image employing projective geometry resulting in very low computational requirements. A three-layered sequential algorithm i.e. Detection-Pixel Level Analysis-Sub Pixel Accuracy, is used to speed up the process and to reduce computational bulk. The position coordinate of a point in a plane is obtained by analyzing the perspective projection of a reference structure on a monocular image perceived by a camera placed at that point. A chessboard pattern is suitably chosen as the reference structure which is placed at the origin of the plane.
2013 International Conference on Informatics, Electronics and Vision (ICIEV), 2013
A Microcontroller based power factor correction (PFC) converter is proposed, which is not affecte... more A Microcontroller based power factor correction (PFC) converter is proposed, which is not affected by harmonic distortion in current and voltage wave shapes. This paper describes the design and simulation of a single-phase PFC converter using Atmel's AVR Microcontroller. It involves sensing and measuring the power factor from the load using ADC; implementing faster algorithm to process the data using discrete time filter which requires least amount of memory; and triggering appropriate capacitors in order to compensate the excessive reactive components. A power factor near to unity is thus achieved, which results higher efficiency and low-THD AC output. A provision for measuring the power is also discussed.
8th International Conference on Electrical and Computer Engineering, 2014
A computationally fast visual approach of autonomous robot localization with high degree of accur... more A computationally fast visual approach of autonomous robot localization with high degree of accuracy is demonstrated. Relative position and orientation of an autonomous robot with respect to a fixed reference point is determined by minimal processing of a monocular image employing projective geometry resulting in very low computational requirements. A three-layered sequential algorithm i.e. Detection-Pixel Level Analysis-Sub Pixel Accuracy, is used to speed up the process and to reduce computational bulk. The position coordinate of a point in a plane is obtained by analyzing the perspective projection of a reference structure on a monocular image perceived by a camera placed at that point. A chessboard pattern is suitably chosen as the reference structure which is placed at the origin of the plane.
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Papers by Ishfaque Rafee