Master Degree / Yüksek Lisans Tezleri

Permanent URI for this collectionhttps://hdl.handle.net/11147/3008

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Author: search.filters.author.Dede, Mehmet İsmet CanSubject: search.filters.subject.Robots--Design and construction

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  • Master Thesis
    Design of a Robotic Device for Automated Nucleic Acid Extraction From Biological Samples
    (Izmir Institute of Technology, 2009) Çe, Ömer Burak; Dede, Mehmet İsmet Can
    Nucleic Acids (DNA or RNA) present the genetic structure of the cell or the organism and so are the essential components to make genetic testing. Molecular genetic testing allows one to analyze the genetic structure of an organism to have an idea about the present temporary or hereditary characteristics of the tissue or the whole organism, or specifically define its species. In order to analyze the genetic structure, one must extract and isolate the nucleic acids (NA), which are most of the time inside the cell. The aim of this thesis study is to design and manufacture an automated device with low throughput DNA extraction. Currently, the automated devices used for extraction of genetic material are being manufactured only by the foreign companies. Automated commercial devices used for this purpose were investigated in detail as well as the manual NA extraction hand tools for use in NA extraction. Commercially available components (pipette tip, reagent cartridges, tubes, etc.) to isolate NA were reviewed. Mechanism design process for a low cost and high precision system that requires minimal human operator intervention is carried out. The conceptual designs were developed and the final design of the device was made to comply with the selected components. Electronic equipments (motors, drivers, interface card, etc.) and a suitable graphical user interface compatible with the electronic components was selected and adapted to the system. Finally, a device which is competitive with the commercial ones has been designed and its prototype has been manufactured as a result of this thesis study.
  • Master Thesis
    Unlimited-Wokspace Teleoperation
    (Izmir Institute of Technology, 2012) Şahin, Osman Nuri; Dede, Mehmet İsmet Can
    Teleoperation is, in its brief description, operating a vehicle or a manipulator from a distance. Teleoperation is used to reduce mission cost, protect humans from accidents that can be occurred during the mission, and perform complex missions for tasks that take place in areas which are difficult to reach or dangerous for humans. Teleoperation is divided into two main categories as unilateral and bilateral teleoperation according to information flow. This flow can be configured to be in either one direction (only from master to slave) or two directions (from master to slave and from slave to master). In unlimited-workspace teleoperation, one of the types of bilateral teleoperation, mobile robots are controlled by the operator and environmental information is transferred from the mobile robot to the operator. Teleoperated vehicles can be used in a variety of missions in air, on ground and in water. Therefore, different constructional types of robots can be designed for the different types of missions. This thesis aims to design and develop an unlimited-workspace teleoperation which includes an omnidirectional mobile robot as the slave system to be used in further researches. Initially, an omnidirectional mobile robot was manufactured and robot-operator interaction and efficient data transfer was provided with the established communication line. Wheel velocities were measured in real-time by Hall-effect sensors mounted on robot chassis to be integrated in controllers. A dynamic obstacle detection system, which is suitable for omnidirectional mobility, was developed and two obstacle avoidance algorithms (semi-autonomous and force reflecting) were created and tested. Distance information between the robot and the obstacles was collected by an array of sensors mounted on the robot. In the semi-autonomous teleoperation scenario, distance information is used to avoid obstacles autonomously and in the force-reflecting teleoperation scenario obstacles are informed to the user by sending back the artificially created forces acting on the slave robot. The test results indicate that obstacle avoidance performance of the developed vehicle with two algorithms is acceptable in all test scenarios. In addition, two control models were developed (kinematic and dynamic control) for the local controller of the slave robot. Also, kinematic controller was supported by gyroscope.