Browsing by Author "Liyanapathirana, B.C."

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    Designing a Fully Automated Pot for Gardeners and a Survey on the Use of the Features to the Consumers
    (Uva Wellassa University of Sri Lanka, 2019) Jayawardhana, H.P.N.; Liyanapathirana, B.C.; Anuradha, U.A.D.N.; Kumari, K.W.S.N.
    This research introduces a new design for an automatic plant caring system which can be used for planting herbs, vegetables or ornamental plants as per consumers’ choice. At present, people are accustomed to purchasing vegetables and fruits from the market, and it seems that only a few people supply their food from their own garden. Many researches have been carried out parallel to this subject on separate features such as automatic watering, automatic fertilizing, and pest and weed controlling and automatic lighting system. A survey on the difficulties faced by horticulturists and the importance of automatic plant caring systems was done by selecting people chosen at random. The age of the selected group ranged between 10-80 years. Result of the survey was analyzed. Moreover the features included in this design and the priority given by the gardener for the highest price that wishes to purchase such items was evaluated in the survey. Majority of the people have requested the item for a price less than 1000 rupees. By evaluating the survey, most of them concluded that there was no time for gardening to be a major problem. Problems other than that were pests, weeds and climate issues. Most people request automatic water supply, pest and weed control and automatic fertilizer as the features included in the automatic plant caring system. In this research, appropriate design of automatic plant care system was also introduced using software. This system is designed to use drip hydroponic technique where fertilizer is supplied via water by dripping plant roots into a tank. When there is no sunlight, light is automatically supplied using the LED panel. The purpose of this work is to show how someone can easily engage in gardening and use this device to supply fresh vegetables and fruits. Similarly, this pot can also be used as a decorative item by planting ornamental plants.
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    Development of automated weather Station: three cup anemometer and tipping bucket rain gauge
    (Uva Wellassa University of Sri Lanka, 2015) Liyanapathirana, B.C.; Chathurani, T.D.K.U.; Wanniarachchi, W.K.I.L.
    Weather is the state of the atmosphere with respect to wind, temperature, cloudiness, moisture, pressure, etc. Weather measurement tools are used to determine the actual weather and forecasting. Natural wind in the open air is a three-dimensional vector that has the directions of north, south, east and west in addition to vertical components and magnitude (i.e., wind speed). As the vertical component is ignored for most operational meteorological purposes, surface wind is practically considered as a two-dimensional vector. An anemometer or wind meter is a device used for measuring wind speed, and is a common weather station instrument. The rain gauge is an instrument that is used to measure the quantity of rainfall or precipitation over a particular time period at a specific region. The forms of precipitation may be in the liquid form that is the rainwater or the solid forms that are the sleet, hail, or even snow. In Sri Lanka it is as rainwater. In this work we have developed an automated weather station of three cup anemometer to measure wind speed and tipping bucket rain gauge to measure rainfall rate. The current wind speed and the rainfall of the past 24 hours were displayed in a LCD panel where the user can easily read and record the data. Methodology A fix magnet is attached onto the three cup anemometer. When the wind blows, cups and axel attached to then will spin relative with the wind speed, thus the magnet will trigger the Hall Effect sensor. A pulse will be generated as an output for each revolution. The time difference from each pulse (length of the pulse) is used to calculate the speed of the wind. The output from Hall Effect sensor will be transmitted to microcontroller to be processed and calculated. The calculated measurements are displayed on the LCD. It is displayed the length of the pulse in milliseconds. A prototype of three cup anemometer was made using Iron Shaft, 2 bearings, 3 Light weight metal rods, 3 cups and, piece of wood (Figure 01). A Hall Effect Sensor and a magnet fixed to the iron shaft were used to detect number of rotations. Electric signal produce due to the Hall Effect is fed to the 16F877A pic microcontroller. A prototype of tipping bucket rain gauge was built by using plastic jar, funnel and plastic, light weight bucket. A light weight ice cream cup was used to build the bucket which contains two separate parts inside the bucket to fill the water one after another and the tipping bucket was set to the lid of the plastic jar with two aluminium L shape pieces (Figure 02). Small magnet was placed at upper edge of the triangle in one side of the bucket. To count the toggling of the bucket, a normally opened reed switch was used and it was placed in one bucket side which has fixed the magnet and covers it with plastic cover to protect from water. Toggling of the bucket was counted by the reed switch.
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    Development of Leader Follower Robot
    (Uva Wellassa University of Sri Lanka, 2016) Liyanapathirana, B.C.; Wanniarachchi, W.K.I.L.
    This paper discusses the development of a leader follower robot based on visual tracking. In leader follower approach, one robot acts as a leader whose motion defines the path for the follower robots. The entire follower robots use the path defined by the leader to achieve a defined task or to attain a certain goal. The advancement of the technology of video acquisition has made devices better and cost-effective. Thereby, many applications those will effectively utilize digital video can be identified. Compared to still images, video sequences provide more information about how objects and scenarios change over time. The strategy copes with the tracking and following of a single object in a sequence of frames and the co-ordinate of the object can be determined. The object tracking video is recorded using a wireless camera and then transmitted into a computer. Then using the software artifact named Roborealm', the video is processed and analysed, hence the object can be detected and coordinates of the detected object is calculated. The object is tracked by plotting a square bounding box around it in each frame. Co-ordinates of the centroid of that bounding box is determined and those coordinates are used for an algorithm which was specifically developed for the motion control of the follower robot. Then the commands related to the motion of the leader robot are transmitted to the follower robot enabling it to follow the leader robot. Keywords: Leader Follower, Video sequencing, Wireless, Tracking
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    GSM, GPS and Facial Recognition Based Vehicle Security System
    (Uva Wellassa University of Sri Lanka, 2018) Udara, G.G.S.; Liyanapathirana, B.C.; Kumari, K.W.S.N.
    This study is focused on developing an improved version of vehicle security system for a bearable price. In this study GSM, GPS, facial detection and recognition technologies are used to overcome liabilities in the existing vehicle security systems. In the proposed system, the real time image processing user authentication is done by comparing a freshly taken photo of the driver with an existing database. Whenever the driver sits on the seat a hidden camera established inside the vehicle turns on and captures a photo of the driver. Cascade Object Detector and Fisher vector features of MATLAB software is being used for facial detection and recognition. Captured image of the driver is compared with the images in the database of authenticated drivers using the above mentioned features and verify the authentication. The GSM technology build up the communication between the vehicle and the owner and it provides the control of the vehicle to the owner's mobile phone. The GPS technology provides the access to gain the co-ordinates of real time precise location of the vehicle. The system consists of a vehicle lock down system that provides owner the facility to lock down the vehicle using a simple text message. Whenever the owner received the security alert he can reply with the predefined text message to activate the lock down system. The lock down system consists of a relay switch system and a fuel supply control valve. When the lock down system initiate it breaks the fuel supply and electric supply to the vehicle. A microprocessor based control system processes the functions of this security system. This well improved vehicle security system provides efficient security for the vehicle. Keywords: GPS Technology, MATLAB, Facial detection, Detector, GSM Technology