Person:
ERSOY, SEZGİN

Profile Picture

Email Address

Birth Date

Research Projects

Organizational Units

OrgUnit Logo
Organizational Unit

Job Title

Last Name

ERSOY

First Name

SEZGİN

Name

Filters

Reset filters

Settings

Search Results

Now showing 1 - 10 of 27
  • Thumbnail Image
    PublicationOpen Access
    Measurement of temperature and displacement with NiTi actuators under certain electrical conditions
    (JVE INT LTD, 2021-06-30) TOPTAŞ, ERSİN; Toptas, Ersin; Celebi, Mehmet Fatih; Ersoy, Sezgin
    In this study, various mechanical behaviors of a shape memory alloy, depending on different thermal and electrical conditions to be used in areas such as biomedical, aerospace and aeronautics. Temperature changes and length change rates under different electrical current values of a shape memory alloy named nickel titanium, or nitinol (NiTi) has been observed. It has been seen that a 0.3 mm diameter wire can generate a force of 25 N while the material extends its linear measurement with a rate of 3.7 mm/s. It is observed that, under diverse constant electrical current values, the displacement and temperature relations of the nickel titanium wire is varying. It has empirically been seen that the nickel titanium alloy actuators are advantageous than their alternatives in terms of the generated strength to weight ratio and shape memory alloy materials can be used as actuators in industrial and biomedical applications.
  • Thumbnail Image
    PublicationOpen Access
    Vibration analysis of screw-fed systems used in additive manufacturing technology
    (2022-06-13) ERSOY, SEZGİN; Ersoy S., Kaba M., Ekinli B.
    Additive manufacturing technology has become quite widespread and produces solutions in many areas. Although it is much more advantageous than machining, this technology continues to be developed every day to increase productivity. In additive production systems with different production processes, it may be necessary to improve the system in order to increase the quality of the products that are desired to increase the sensitivity. In this study, it is aimed to determine the vibration behavior of the screw used in the screw extruder method, which will eliminate the errors caused by the continuous filament technology used in FDM technology in layered production. Keywords: additive manufacturing, screw extrusion, vibration analysis.
  • Thumbnail Image
    PublicationOpen Access
    Reading and playing musical notes with image processing techniques with mobile application
    (2022-08-25) ERSOY, SEZGİN; Ersoy S., Özdöşemeci F.
    The aim of this study is to process the notes on the music sheet, written by hand on the musical note line or edited in the computer environment, with the image processing technique and to play the music over the phone application. This application will be developed with Java in the Android Studio environment and image processing will be done using the OpenCV Library. Detection of a note will be memorized by calculating the value and duration of the note. After these sounds, the frequency values of the notes will be available on the phone.
  • Thumbnail Image
    PublicationOpen Access
    Air leakage test system for product without atmosphere air connection
    (2023-06-01) ERSOY, SEZGİN; Temiz I., Feyzioğlu A., Çelebi M. F., Ersoy S.
    With the air leakage test methods, the leakage tests of the products that are required to be leakproof are carried out. This leakage test starts with placing the product on a fixture. The in-ternal pressure is increased by filling compressed air into the product placed in the Fixture. The product is filled with compressed air up to a previously calculated test pressure value. After the test pressure value is reached for the desired product, the air filling process is completed, and the stabilization period begins. At the end of this period, information about the leakage of the product is obtained, depending on whether there is a change in the internal pressure of the product. In order to fill the product with compressed air, there must be an air hole on the product. Products without this air hole cannot be tested with these methods. With the new method we will develop, it will be possible to test the leakage of closed products without atmosphere-air connection.
  • No Thumbnail Available
    PublicationMetadata only
    Investigation of industrial tea-leaf-fibre waste material for its sound absorption properties
    (ELSEVIER SCI LTD, 2009) KÜÇÜK, HALUK; Ersoy, Sezgln; Kucuk, Haluk
    The sound absorption of an industrial waste, developed during the processing of tea leaves has been investigated. Three different layers of tea-leaf-fibre waste materials with and without backing provided by a single layer of woven textile cloth were tested for their sound absorption properties. The experimental data indicate that a 1cm thick tea-leaf-fibre waste material with backing, provides sound absorption which is almost equivalent to that provided by six layers of woven textile cloth. Twenty millimeters thick layers of rigidly backed tea-leaf-fibres and non-woven fibre materials exhibit almost equivalent sound absorption in the frequency range between 500 and 3200 Hz. (C) 2007 Elsevier Ltd. All rights reserved.
  • Thumbnail Image
    PublicationOpen Access
    The effect of a new teaching methodology on learning performances of automotive - mechatronics students
    (ELSEVIER SCIENCE BV, 2010) KÜÇÜK, HALUK; Ersoy, Sezgin; Kucuk, Haluk; Uzunboylu, H
    In this study a new methodology for teaching of Automotive Mechatronics course is proposed. The students who have taken the course were divided into two groups: the first, for classical mode of teaching and the other for the new model of instruction. The performance of the students were measured by pre-test and post-test. The results show that, handing out the class material beforehand and having the students learn by practicing in the laboratory, increase the students' interest and success when compared to those being taught the theory, in class and having completed the experiments in the lab afterwards. (C) 2010 Elsevier Ltd. All rights reserved.
  • Thumbnail Image
    PublicationOpen Access
    Design and Analysis Comparison of Surface Acoustic Wave-Based Sensors for Fabrication Using Additive Manufacturing
    (HINDAWI LTD, 2021-06-12) ERSOY, SEZGİN; Waqar, Tayyab; Ersoy, Sezgin
    Sensors have become an integral part of our everyday lives by helping us converting packets of data to make important decisions. Due to this reason, researches are done constantly to improve the fabrication processes of sensors by making them more user-friendly, less time-consuming, and more cost-effective. The application of any fabrication solution that offers those advantages will have a major impact on the manufacturing of modern sensors. To address this issue, a 3D printed Surface Acoustic Wave (SAW) temperature sensor is presented in this paper. The modelling and analysis of such a sensor have been performed for both aluminium and copper electrodes using COMSOL software. In total, 4 different sensing structures, 2 each for both aluminium and copper electrodes based one-port resonators, are designed and analysed for their application in temperature sensing. The resulting responses of those sensors are approximately 2.19 MHz and 424.01 MHz frequency ranges. The novelty lies in the possibility of mass-producing such a sensor using additive manufacturing will have a direct impact in the areas where conventional electronics cannot be utilized.
  • No Thumbnail Available
    PublicationMetadata only
    Effects of HIPS on the Sound Absorption and Impedance Ratio of SEBS/HIPS/CaCO3 Polymer Composites
    (TAYLOR & FRANCIS INC, 2012) TAŞDEMİR, MÜNİR; Tasdemir, Munir; Ersoy, Sezgin; Ulug, Ebru
    A sound absorption material composed of styrene ethylene butadiene styrene, high impact polystyrene and CaCO3 has been developed. Its sound absorbing characteristic was investigated in the impedance tube, according to transfer function method. Measurements show that HIPS ratios have effect on the absorption performance of the blend because of their microstructures and features. The structure and properties of the blend is characterized using a scanning electron microscopy (SEM). Furthermore, styrene ethylene butadiene styrene and high impact polystyrene polymer blend was subjected to examinations to obtain their hardness and Izod impact strength. When the sound absorption characteristics of the materials are examined, a unsteady behaviour is observed up to the level of 1600 Hz. It is determined that sound absorption characteristics of all materials increase after this point. A high and steady behaviour is observed, particularly after 4800 Hz.
  • Thumbnail Image
    PublicationOpen Access
    Computational model for the nonlinear dynamic response of MEMS-based micromirror
    (2022-08-25) ERSOY, SEZGİN; Ertuğrul İ., Ersoy S., Ragulskis M.
    In this study, it is aimed to perform Finite Element Analysis (FEA) of micromirror based on Micro-Electro-Mechanical Systems (MEMS) and to examine the nonlinear and dynamic responses of this system. Micromirror devices are indispensable, especially for optical systems and form the basis of them. In this work, dynamic and nonlinear responses of micromirror with 4 symmetric arms and one reflective surface were investigated. During the design and modeling, it is assumed that the upper and lower layers of the reflective surface have equal tensile and compressive stresses. The analysis of the system was obtained by applying a force of up to 30 GPa Prestressed on the reflective surface. The design and FEA of the micromirror system were made with the Comsol Multiphysics program. The nonlinear response of the analysis was carried out with the MATLAB program. This model, which has the most basic design of micromirror structures used in optical systems, is thought to be a source for a good examination of the nonlinear dynamic model and for understanding more complex structures.
  • No Thumbnail Available
    PublicationMetadata only
    The fundamentals of metal-matrix composites
    (NOVA Science Publishers Inc., 2022-01-01) ERSOY, SEZGİN; Ersoy S. (Editör)
    Developing production technology tries to respond to human needs. Meeting these needs requires the development of new products or an increase in the supply of raw materials. Although polymer-based, recycled, and natural resources are used as raw materials, it does not reduce the importance of metal-based structures. However, there is a need to use these metal-based materials at lower costs or to improve their existing properties. This book offers relational studies to these issues.