• About
  • Policies
  • What is openaccess
  • Library
  • Contact
Advanced search
      View Item 
      •   BUIR Home
      • University Library
      • Bilkent Theses
      • Theses - Department of Mechanical Engineering
      • Dept. of Mechanical Engineering - Master's degree
      • View Item
      •   BUIR Home
      • University Library
      • Bilkent Theses
      • Theses - Department of Mechanical Engineering
      • Dept. of Mechanical Engineering - Master's degree
      • View Item
      JavaScript is disabled for your browser. Some features of this site may not work without it.

      Development of a vector sensor using piezoelectric support beams

      Thumbnail
      View / Download
      16.9 Mb
      Author
      Tiftikçi, Alper Yasin
      Advisor
      Çakmakcı, Melih
      Date
      2016-09
      Publisher
      Bilkent University
      Language
      English
      Type
      Thesis
      Item Usage Stats
      114
      views
      272
      downloads
      Abstract
      Underwater listening has attracted great interest since the twentieth century. Formerly, scalar hydrophones were used to detect sounds underwater by measuring only the pressure changes. These sensors needed to form an array to detect the direction of an incoming wave. They were positioned with intervals and the time delays of the sound among hydrophones gave the information of direction. However, vector hydrophones have become an attractive alternative since they can provide both scalar and vector information on their own. An Acoustic Vector Sensor (AVS) is a device used to detect acoustic signals by converting mechanical energy of an incident wave to a detectable electrical energy. Its design is based on two parallel piezoelectric beams attached to a mechanical sensing tip using a rotary joint component. The sensor uses piezoelectric elements to convert mechanical strain into sensible electrical signal. Design of the sensor is modular since each individual sensing element could be easily changed, tested and calibrated. All parts of sensor has been fabricated by mechanical micromachining and precisely assembled, which increases design and manufacturing exibility. In this thesis, the mechanical design of the sensor that uses the piezoelectric e ect for detection of sound is presented. First, a computational analysis method which predicts the dynamic response of the designed sensor is developed. Then, a tigthly controlled vibration experiment platform is set up to emulate the e ect of the motion of the acoustic particle. The computational simulations are then validated with initial experiments and the design of the sensor is nalized.
      Keywords
      Acoustic vector sensor
      Piezoelectric effect
      Finite element analyses
      Micro-fabrication
      Permalink
      http://hdl.handle.net/11693/32234
      Collections
      • Dept. of Mechanical Engineering - Master's degree 66
      Show full item record

      Browse

      All of BUIRCommunities & CollectionsTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartmentsThis CollectionTitlesAuthorsAdvisorsBy Issue DateKeywordsTypeDepartments

      My Account

      Login

      Statistics

      View Usage StatisticsView Google Analytics Statistics

      Bilkent University

      If you have trouble accessing this page and need to request an alternate format, contact the site administrator. Phone: (312) 290 1771
      © Bilkent University - Library IT

      Contact Us | Send Feedback | Off-Campus Access | Admin | Privacy