6 Axis Motion Data Logger   [ Oct 2015 - Jan 2016]

    This wireless device is able to log upto 9 axis motion data, time and geo-location at a configurable frequency into an SD volume. Additionally, it also has the capability to continuously record data to a remote Amazon EC2 Instance over wireless TCP/IP at a max rate of 40Hz and was tested to upload a several million records wirelessly onto an Amazon EC2 Instance. The project was developed with the intention of analysing the motion of an elephant to determine optimal kinetic energy harvesting techniques.

    More information about this development can be found from here.

GSM Based Tracker with Energy Harvesting [Feb - Nov, 2013]

    Completed as a partial fulfillment for the final year undergraduate project, this device is capable of efficiently harvesting from as low as microwatts (μW) to milliwatts (mW) of energy generated from a variety of sources such as solar, thermoelectric, electromagnetic and vibration energy. The strength of energy scavenging capability of this design emerges from the capabilities of the TI BQ25504 IC. The MSP430 MCU further extends the unit’s lifetime with it's ultra-low power capabilities. The following figure depicts potential energy harvesting sources and respective energy densities available through typical transducers.


    Figure 1 : Energy harvesting sources and their typical harvestable energy desnsities.

    This design was a standalone module developed to be a part of a conceptual system. The conceptual system was formulated by my supervisor with the intention of enabling a mechanism to log location data of elephants of higher recency to formulate a solution to the Elephant Human Conflict (HEC) in Sri Lanka. A brief idea of this conceptual system at that time can be obtained from the figure below.


                Figure 2 : Overview of the said conceptual system.

    An overview of the algorithm that would run inside the MCU is provided below.


                Figure 3 : Overview of the MCU algorithm.

    The following figure depicts GSM coverage and HEC affected areas in Sri Lanka. An idea of the effectiveness of this type of an approach can be obtained from the same.


        Figure 4 : GSM coverage and HEC affected areas in Sri Lanka.

    The following figures showcase the schematic and the board layout design. You may save images to see at higher resolutions.


                          Figure 5 : Schematic design.


                           Figure 6 : Board layout design.

    The following are images of the prototype design.


    Figure 7 : Prototype version of the energy harvesting tracker unit.


                                 Figure 8 : Prototype PCB.

    It should also be stated that the entire design process except printing the PCB was completed as an individual project from February 2013 to November 2013 under the supervision of Dr. Malitha Wijesundara. Design files for the entire PCB design are attached here. You may use them for any commercial or noncommercial purposes. However, if you use them in your research, please be kind enough to cite my relevant publication.

A Model Radar [November 2012 - January 2013]

    During the internship at the Airport and Aviation, I undertook a project to develop a simple circuit that demonstrates the basic concept of a radar using reflected ultrasonic waves. The project was presented at the annual national exhibition "Deyata Kirula", 2013. The project involved no programmable devices.

    I also use this opportunity to express my heartfelt gratitude to the world's best analog electronics designer, Mr. Ananda Perera, who during the time of my internship was a Senior Electronics Engineer at the Electronics and Air Navigations Unit at the Airport & Aviation Service, Sri Lanka. I cannot express enough the gratitude I have towards him for teaching me the power of analog electronics and spending his valuable time mentoring me throughout my internship at AASL.

    The following are some photos taken during my internship.


                    Figure 9 : Myself with the simple model radar.


                    Figure 10 : A closer look at the project.

        Figure 11 : Renovating a localiser antenna close to the runway.

Jathun Gamage Isuru Amalinda

Research Assistant

Sri Lanka Institute of Information Technology

Colombo, Sri Lanka

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Research Centre,
Sri Lanka Institute of Information Technology,
Malabe
10115