• English
  • Deutsch
  • Log In
    Password Login
    Research Outputs
    Fundings & Projects
    Researchers
    Institutes
    Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Artikel
  4. Air Ultrasonic Signal Localization with a Beamforming Microphone Array
 
  • Details
  • Full
Options
2019
Journal Article
Title

Air Ultrasonic Signal Localization with a Beamforming Microphone Array

Abstract
Nondestructive testing methods are used to inspect and test materials and components for discontinuities or differences in mechanical characteristics. Phased array signal processing techniques have been widely used in different applications, but less research has been conducted on contactless nondestructive testing with passive arrays. This paper presents an application of beamforming techniques analysis using a passive synthetic microphone array to calculate the origin and intensity of sound waves in the ultrasonic frequency range. Acoustic cameras operating in the audible frequency range are well known. In order to conduct measurements in higher frequencies, the arrangement of microphones in an array has to be taken into consideration. This arrangement has a strong influence on the array properties, such as its beam pattern, its dynamics, and its susceptibility to spatial aliasing. Based on simulations, optimized configurations with 16, 32, and 48 microphones and 20 cm diameter were implemented in real experiments to investigate the array resolution and localize ultrasonic sources at 75 kHz signal frequency. The results show that development of an ultrasonic camera to localize ultrasonic sound sources is beneficial.
Author(s)
Movahed, Ali
University of Applied Sciences htw saar, Saarbrücken, Germany
Waschkies, Thomas  
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Rabe, Ute  
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Journal
Advances in Acoustics and Vibration  
Funder
Bundesministerium für Wirtschaft und Energie BMWi (Deutschland)  
Open Access
DOI
10.1155/2019/7691645
Language
English
Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP  
Keyword(s)
  • nondestructive testing

  • phased array signal processing

  • beamforming

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Contact
© 2024