Shadman Sakib

In this paper, an upgraded version of vehicle tracking system is developed for inland vessels. In addition to the features available in traditional VTS (Vehicle Tracking System) for automobiles, it has the capability of remote monitoring of the vessel's motion and orientation. Furthermore, this device can detect capsize events and other accidents by motion tracking and instantly notify the authority and/or the owner with current coordinates of the vessel, which is obtained using the Global Positioning System (GPS). This can certainly boost up the rescue process and minimize losses. We have used GSM network for the communication between the device installed in the ship and the ground control. So, this can be implemented only in the inland vessels. But using iridium satellite communication instead of GSM will enable the device to be used in any sea-going ships. At last, a model of an integrated inland waterway control system (IIWCS) based on this device is discussed.

Ground vehicles are being intelligent day by day. But in today's market the price of an autonomous, which is still in its experimental phase, or a semi-autonomous intelligent vehicular system is too high. Apart from the usage of expensive sensors, previously proposed vehicular networking systems for intelligent vehicles need network provider and communication towers like cellular communication networks which is both time consuming and costly to implement. Moreover, the mechatronics part, which controls the vehicle is very much different from a traditional intra-vehicular mechanism making it very difficult to convert a regular vehicle, e.g. a car, into an intelligent one. Due to these facts, these overpriced systems are not suitable for the underdeveloped countries where, these are somewhat more needed. In this paper, I have developed a very cheap intelligent system for providing guidance to the driver while driving. This module will not be connected to the hardware directly, which made it an easy-to-install ―helper module‖ for any kind of ground vehicles. However, this module will reduce the accident rate by collecting and analyzing surrounding data, communicating with nearby vehicles (peer to peer) while overtaking and providing continuous guidelines for safe driving. Unlike other systems this could easily be deployed in the underdeveloped countries because of its ultra-low cost.

A large portion of the physically disabled community of the world is currently using wheel chair which is not universally accessible. In many countries, public transport system depends on high floor bus and a wheel chair user fails to access to that comfortably. This research aims to demolish that problem of inaccessibility through a modification of the high floor bus door. The basic methodology here, consists of movable door-step system (one vertically and other horizontally) which allows the lifting of a wheel chair into the bus. Two linear actuators and two rack and pinion mechanisms are involved in this system. In this research, through simulation analysis the feasibility of the lifting step is tested. Eventually, the cost is discussed for performing this type of modification in a public bus in Bangladesh. So, this work will help people to find an effective mean to make public buses accessible for disabled persons. KEYWORDS: Universally accessible, linear actuator, rack and pini...

Hydrographic survey is of great importance in many fields. The accuracy of the survey has a huge dependency on the sea condition, which is the main parameter of the vessel's motion. Modern vessels use inertial measurement units to track the motion and compensate its effect. However, it is still under development as an optimum solution is yet to be found. Most of the techniques require special " ground markings " and complex procedures. Companies which use IMUs did not reveal their technology. Moreover, they use special kind of IMUs which are very expensive and bulky. In this paper, low cost digital Inertial Measurement Units (IMU) are used to determine the vessel's rotational motions and a general expression is derived from scratch for the correction of depth and position data in real-time, which is incorporated with a simple working algorithm. This compensation will enable the survey vessels to work under harsh weather. Focus is given on the roll and pitch motion as these two have the prime effect on the measurement and cannot be not detected using GPS.

In this paper, an upgraded version of vehicle tracking system is developed for inland vessels. In addition to the features available in traditional VTS (Vehicle Tracking System) for automobiles, it has the capability of remote monitoring of the vessel's motion and orientation. Furthermore, this device can detect capsize events and other accidents by motion tracking and instantly notify the authority and/or the owner with current coordinates of the vessel, which is obtained using the Global Positioning System (GPS). This can certainly boost up the rescue process and minimize losses. We have used GSM network for the communication between the device installed in the ship and the ground control. So, this can be implemented only in the inland vessels. But using iridium satellite communication instead of GSM will enable the device to be used in any seagoing ships. At last, a model of an integrated inland waterway control system (IIWCS) based on this device is discussed.

Ground vehicles are being intelligent day by day. But in today’s market the price of an autonomous, which is still in its experimental phase, or a semi-autonomous intelligent vehicular system is too high. Apart from the usage of expensive sensors, previously proposed vehicular networking systems for intelligent vehicles need network provider and communication towers like cellular communication networks which is both time consuming and costly to implement. Moreover, the mechatronics part, which controls the vehicle is very much different from a traditional intra-vehicular mechanism making it very difficult to convert a regular vehicle, e.g. a car, into an intelligent one. Due to these facts, these overpriced systems are not suitable for the underdeveloped countries where, these are somewhat more needed. In this paper, I have developed a very cheap intelligent system for providing guidance to the driver while driving. This module will not be connected to the hardware directly, which made it an easy-to-install “helper module” for any kind of ground vehicles. However, this module will reduce the accident rate by collecting and analyzing surrounding data, communicating with nearby vehicles (peer to peer) while overtaking and providing continuous guidelines for safe driving. Unlike other systems this could easily be deployed in the underdeveloped countries because of its ultra-low cost.

Accidents in inland waterways have become a serious problem in Bangladesh. Many people lost their lives in these accidents with a huge monetary losses as well. Overloading of passengers is the main reason behind the capsizing of these inland water vessels. Drivers and ship owners overload the vessel beyond the design limit in the peak seasons to maximize their profit. Their ignorance of the ship’s mechanisms, structure and safety factors increases the problem even more. Government’s attempt to prevent this problem gets wasted due to the corruption, bribery and lack of supervision. But all of these problems can be solved by implementing an autonomous monitoring system in each vessel which will monitor the loading and stability condition according to the safety criteria. In this paper, we have tried to develop such a device capable of monitoring the draft, displacement, metacentric height, etc. crucial parameters for safety and stability based on its rolling motion. Due to its dynamicity, it can warn the crews and passengers, turn off the engine power and even send signal to the control room as soon as any safety criteria is violated. Besides, this device will mitigate the necessity of lengthy inclining experiment. Although this system is developed for the inland passenger vessels, its scope is beyond that and can be implemented in any seagoing vessels for dynamic monitoring with some minor modifications.

In this paper we have discussed a unique general algorithm for exploring and solving any kind of line maze with another simple one for simple mazes without loops or with loops having highest two branches none of which are inward. For the general algorithm, we need a method to map the whole maze, which is required if the maze is complex. The proposed maze mapping system is based on coordinate system and after mapping the whole maze as a graph in standard ‘Adjacency-list representation’ method, shortest path and shortest time path was extracted using Dijkstra's algorithm. In order to find the coordinates of the turning points and junctions, linear distances between the points are needed, for which wheel encoder was used. However, due to non-linear movement of robot, the directly measured distance from the encoder has some error and to remove this error an idea is built up which ended by deriving equations that give us almost exact linear distance between two points from the reading of wheel encoder of the robot moving in a non-linear path