Shah Muhammad Ferdous

Design of an Autonomous Mobile Wheel Chair for Disabled Using Electrooculogram (EOG) Signals

This paper discusses the implementation of a simple, effective and low cost design of a microcontroller based wheelchair using the EOG signal collected from muscles those are responsible for the movement of the human eye. This was an exploratory research that was carried out to allow a disabled person to control the wheelchair by using only the movement of his eyes. Electrooculography (EOG) is a technique for sensing and recording the activation signal of the muscles and was used to collect and evaluate the myoelectric signal generated by the eye muscles during different movements. The main purpose of the work is to design a cost-effective, easily affordable and accessible wheel chair for the disabled general masses where advanced attachments like on board computer, digital cameras, sophisticated sensors etc. are not being used, rather concentration has been paid on designing a more simple, practical but effective system using an electronically controlled differential drive structure with only two wheels. A low cost microcontroller (ATMEGA 32) serves as the brain of the system for all types of control purposes.

An overview of smart grid technology in Bangladesh: Development and opportunities

Generally smart grid is a modern technology of power system which can convert the whole power system in to digital format. In brief, a smart grid is the use of sensors, communications, computational ability and control in some form to enhance the overall functionality of the electric power delivery system. A system becomes smart by sensing, communicating, applying intelligence, exercising control and through feedback. For an ideal power system, this permits several functions which can optimize in the combination of the use of bulk generation and storage, transmission, distribution, and consumers. It can fulfill the goal which can ensure reliability and optimization of the use of Energy. It will also keep the environment free from pollution, save the assets, minimize the cost, easy operation against all hazards, maximum possibility to keep out from danger, provides power quality for 21st century needs. The focus of this paper is to familiarize with smart grid perspective to Bangladesh. The conception of smart grid is almost new is Bangladesh. The whole power system network in Bangladesh is very elaborate and complex but primitive. To reduce this complexity and improve the performance of the system, smart grid can be a better solution. Load-shedding is a common phenomenon in Bangladesh. It can be solved by smart grid technology. As it can automatically detect, calculate and distribute electricity as per load requirements, it reduces the system loss and at the same time a certain amount of electricity from the grid would always be available at each consumer side even at the time of load shedding. Bangladesh can be greatly benefited by using this technology. The main objective of this paper is to discuss the necessity of smart grid for the perspective of Bangladesh which may be an effective solution to overcome the recent power crisis.

Smooth Track-Keeping and Real Time Obstacle Detection Algorithm and its PID Controller Implementation for an Automated Wheeled Line Following Robot

Line following automated robots is extensively used in industries for smooth running of production. This paper presents a simple and effective solution for path tracking problem for a wheeled automated mobile robot which can be used for material handling in industries. A PID controller has been used for controlling the robot which is capable of moving safely by smooth track-keeping in partially structured environment without any collision with static or moving objects. The purpose of the project is to build a mobile robot which will provide fast, smooth, accurate and safe movement in any given line or track. A straight or wavy line would be simple to follow whereas aT-junction, 90 degree bends, acute angle bends and grid junctions would be difficult to navigate through. This is due to the physical kinematics constraints which are limited to motor response, position and turning radius of the robot. A line sensor configuration has been proposed to improve the navigation reliability of the mobile robot which uses differential drive system. A dynamic algorithm has been developed for detecting and following a specified line which ensures the reliable and safe movement of the robot.

Implementation of a Controller Unit for an Intelligent Ventilation System (IVS) for a BTS Room

Bangladesh is currently facing 1500 MW of power shortage causing serious dislocation in all spheres of life including production in fields and factories as well as in the section of cellular communication. As a result of giving support to the increasing customers the operators are improving their network by building new BTS all over the country which requires a great deal of electricity support. So to save the electricity and make the use of air conditioner less a system called Intelligent Ventilation System (IVS) is developed. An IVS is an electronic instrument that records data from the environment condition and take decision how the room temperature should be controlled. This research work deals with the design and construction of a ventilation system using the PIC16F877A which includes 10 bit Analog to Digital Converter (ADC) for data conditioning and a 256 byte EEPROM for data storing. Here we use a 4X20 line Liquid Cristal Display (LCD) for display section as well. General Terms ADC, Air Conditioner, BTS, Fan, LCD, Microcontroller.

Design and Implementation of an Articulated Robotic Arm for Precise Positioning

This project is intended to design an articulated robotic arm which could locate a point in space with its given coordinates at three degrees of freedom. The basic three rotary movements are base rotation, first and second arm swivel. With different payload capability and design, the robot can be employed in various industrial applications including spot welding, assembling, cutting, material handling and many more. The mechanical structure is designed and a physical setup is developed for which a microcontroller based control circuit is designed for the purpose of control. This paper is focused mainly on the mechanical design of the structure. An elaborate analytic description of the components and tools is presented with necessary specifications. This structure is very flexible and has the ability to reach over obstructions. It can achieve different positions and orientations with in the working envelop.

A Microcontroller Based Controller Circuit for the Motion Control of an Articulated Robot with Three Degrees of Freedom

Due to the quick evolution of manufacturing processes, the demand for more flexible automation systems is on the rise. To answer these requirements, distributed motion control architecture based on intelligent drives tends more and more to replace the traditional solutions. This paper presents the control of an articulated arm robot with three degrees of freedom. The essential part of the robotic arm is a programmable microcontroller based system capable of driving basically three stepper motors design to form an anthropomorphic structure. This paper explains the method of interfacing the robotic arm stepper motors with the programmed Atmega16 microcontroller which is used to control the robot operations. C programming language is employed here in programming the microcontroller.

Design and Implementation of a Linear IC Based Low Cost Digital Tachometer for Laboratory and Industrial Application

Any adjustable speed drives uses an incremental shaft encoder or a sensor and an electronic circuit for rpm as well as velocity estimation. The usual method of counting pulses generated by encoder or sensor in a fixed period of time produces a high precision velocity or rpm estimation in the high speed range. Tachometer plays a vital role in measurement of rpm of any rotating device and it is essential for any control system especially in servomechanism. Most of the controllers employed in the industry to control industrial process use a tachometer which gives the provision of feedback in a control circuit. The purpose of the project was to develop a digital tachometer using low cost linear digital ICs those are readily available in the markets of Bangladesh. This tachometer can be easily used for both industrial and laboratory purposes where it should be able to measure rpm and provide a voltage proportional to the speed of the shaft of the rotating device. At the same time efforts have been taken to reduce the cost of the tachometer as much as possible.