Dissertation > Excellent graduate degree dissertation topics show

Measurement System for Acoustic Array Phase Difference

Author: MaLan
Tutor: PuShengChun
School: Harbin Engineering University
Course: Acoustics
Keywords: array signal processing array phase calibration phase compensation LABVIEW
CLC: TN912.3
Type: Master's thesis
Year: 2012
Downloads: 26
Quote: 0
Read: Download Dissertation

Abstract


In recent years, the receiving array of sonar system is generally composed by a numberof elements, however, it is very difficult to guarantee the phase consistency between the arrayelements. The different phase responses among the acoustic array elements can seriouslydegrade the array signal processing performances. So it appears to be very important tocompensate phase responses of array elements by precise phase estimation.In this paper, a technique for estimating and calibrating the acoustic array phasedifference based on the least-square estimates is described. This technique is effective in theapplication of uniform linear array. Besides, it is very convenient for calibrating the array in asmall pool, without precise location of sound source.In this thesis, firstly, the development of methods is introduced of calibrating theacoustic array phase difference. Secondly, the measuring principles and experimental processof the calibration method are illustrated in detail, based on the least-square estimates. Thirdly,through the simulation, it is proved that this technique can effectively estimate the position ofthe source and the phase of the array elements. And the performance of the MUSICbeamforming algorithm is greatly improved after compensation comparing with theconventional beamforming method, which is not sensitive to the phase differences. Finally, asystem for testing the phase difference is established, realizing collection and storage of arraysignals, computation of the phase consistency between the array elements and analysis of theperformance of the array.

Related Dissertations

  1. Image Analysis System of Metal Transfer of Gas Metal Arc Welding,TG444
  2. Research on Nozzle Plume Temperature Distribution Measurement System,V434
  3. The Electrostatic Dust Removal System Based on Microcontroller and LabVIEW,X701.2
  4. Oil -in-water type emulsified oil water hammer harmonic LabVIEW Simulation and Experimental Research demulsification,X703
  5. LabVIEW-based virtual oscilloscope design and remote control,TM935.3
  6. Axial fan blade vibration non-contact measurement,TD441.2
  7. The Power Quality Monitor Based on Virtual Instrument,TM76
  8. Design of Analysis System of Audio Signals Based on Virtual Instrument,TP274
  9. Design and Implementation of Network Data Management System Based on LabVIEW,TP274
  10. Development of Real-Time Electronic Detection System for Raw Silk Based on cRIO,TS147
  11. Development of Electronic Real-Time Inspecting System for Eaw Silk Based on NI cRIO,TS147
  12. Exploration and Analysis of Electronic Detection of Raw Silk’s Flatness,TS147
  13. Control System Research for a Nano-Material Mixer,TP273.5
  14. Research on Solenoid Valve Test System for Water Medium,TH134
  15. Research on Delay Compensation and Schedule Algorithms of Networked Control Systems,TP273
  16. Research cylinders detection system mold width,TF341.6
  17. Development and Research of the Measuring and Controlling System on Virtual Instrument,TH703
  18. Study on LabVIE-Based Measurement of Junction Temperature of LED and Its Photoelectric Properties,TN312.8
  19. Design and Implementation of Mine Drainage Automatic Monitoring System Based on LabVIEW,TD744
  20. The Research of Noise Source Identification Method Based on Sound Array and Acoustic Holography Harmonic,TB535
  21. Research on Parameter Estimation Algorithm for Distributed Sources,TN911.23

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Electro-acoustic technology and speech signal processing > Speech Signal Processing
© 2012 www.DissertationTopic.Net  Mobile