Browsing by Author "Dunuweera, MS"

Now showing 1 - 4 of 4

item: Conference-Abstract
Enhanced position sensing device for mobile robot applications using an optical sensor
(2016-04-26) Abeykoon, AMHS; Udawatta, L; Dunuweera, MS; Gunasekara, RT; Fonseka, M; Gunasekara, SP
This paper introduces a low cost method of sensing position using a optical sensor. Main objective of this study was to overcome the shortcomings associated with the conventional contact type of position sensors using a low cost device. In a slippery terrain, rotary encoder based data often produce erroneous results, whereas, if optical based method is used it would be preferred. For this study, PAN 3101 type low cost CMOS optical sensor is used. This sensor is often used for making computer mice. Built device comprises of a PAN 3101 sensor, lens assembly, illuminating components and a micro controller based interface. Lens assembly comprises of the convex lenses. PAN 3101 sensor processes the images that are taken through the lens assembly and gives the position in terms of relative distances traveled in vertical and horizontal directions. Micro controller based interface handles the communication between PAN 3101 sensor and the main application that utilizes this technology. So this module can be used in applications that needs smooth position detection capabilities. Built device was attached to a mobile robot so that the robot can be driven from the position information of the rotary encoder and the new optical position sensing device. Results from both rotary encoder and optical device are presented to validate the applicability of the proposed concept.
item: Conference-Extended-Abstract
Position detecting module
(2010) Dunuweera, MS; Fonseka, M; Gunasekara, RT; Gunasekara, SP; ; Abeykoon, AMHS; Udawatta, L
This invention relates to a method of sensing positions in application such as mobile robotic applications. The main objective of this invention is to overcome certain issues related to position detection mechanisms available in mobile robotic applications and other relevant applications that have position detection methods. Specifically the invention related to moving application to identify its distance traveled with a new optical design to PAN 3101 low cost CMOS optical sensor. PAN 3101 sensor process the images that are taken through the optical design and gives the position in terms of relative distances traveled in vertical and horizontal directions. Microcontroller that utilize this technology. So this module can be used in applications that needs smooth position detection capabilities.
item: SRC-Report
Position detecting module
Dunuweera, MS; Fonseka, M; Gunasekara, RT; Gunasekara, P; Harcha, AM; Abeykoon, S; Udawatta, L
This invention relates to a method of sensing positions in application such as mobile robotic applications. The main objective of this invention is to overcome certain issues related to position detection mechanisms available in mobile robotic applications and other relevant applications that have position detection methods. Specifically the invention related to moving application to identify its distance traveled with a new optical design to PAN 3101 low cost CMOS optical sensor. PAN 3101 sensor process the images that are taken through the optical design and gives the position in terms of relative distances traveled in vertical and horizontal directions. Microcontroller that utilize this technology. So this module can be used in applications that needs smooth position detection capabilities.
item: Thesis-Full-text
Techno economic analysis, design and implement a suitable communication method for utility systems
Dunuweera, MS; De Silva, PSN; Hemapala, KTMU; Wavegedara, C
This thesis presents a research work which is carried out to optimize the Zigbee based remote meter reading network. There are various technologies available to automate the meter reading such as PLC, GSM, Optical fibre and RF technologies. As far as utilities providers are concerned, their focus is on a reliable RMR system to read the meter at minimum possible cost. The development of a reliable RMR system is highly dependent on telecommunication infrastructure which is costly if GPRS is used as a way of communication. Therefore, research were done in depth to analyse the cost and function of RMR system as large number of sensors are used in the electrical utility. This particular research is on data concentrator based RMR system focusing on the analysing of communication delay and resource optimization. In this research Matlab Simulink software was used for simulations and Visual Studio C# is used for creating the software. Several simulations were carried out in this research, for simulating communication speed, communication path and study the behaviour with the presence of noises. As the final outcome of the research, software was developed for selecting Zigbee power rating based on GPS locations and generated algorithms for calculating communication delay and path which can be incorporated to the coordinator.