Dissertation > Excellent graduate degree dissertation topics show

Research on Source Identification by Using Acoustic Holography

Author: LiLei
Tutor: YangDeSen
School: Harbin Engineering University
Course: Underwater Acoustics
Keywords: Acoustic holography The NAH Acoustic Imaging Reconstruction of the sound field
CLC: TP274.5
Type: Master's thesis
Year: 2008
Downloads: 122
Quote: 0
Read: Download Dissertation

Abstract


Acoustic holography method is an important acoustic imaging techniques, is an effective method to identify noise sources . It is the use of the sound field space sound field characteristics of a region known to predict another area of ??the sound field characteristics . Sound source identification method based on the NAH theory , numerical simulation and analysis of the the lake test data processing . Verify a very effective way to locate and identify noise sources are reconstructed based on the particle velocity , sound pressure reconstruction based on sound intensity reconstruction of three methods . The papers start from the basic relationship of the sound field radiated by the basic principles of the plane of the NAH reconstructed based on the sound pressure , velocity reconstruction, the sound intensity reconstructed plane near-field acoustic holography theoretical analysis . By BAHIM basic principles deduced the the cylinder within BAHIM applications calculation formula . The holographic reconstruction formula is derived in the scope of the limited space on the discrete expression , given the error suppression measures . On the basis of theoretical analysis , computer programming planar near field acoustic holography reconstruction, based on sound pressure velocity reconstruction simulation analysis and reconstruction of the results of a comparative analysis . Simulation based on sound intensity planar, cylindrical near-field acoustic holography , phase error and error suppression measures to verify the feasibility and effectiveness of BAHIM technology used to identify the sound source . The paper also Songhua Lake Experimental data processing and analysis of results . Processing of the experimental data , the assessment of the feasibility and effectiveness of the NAH technical sound source reconstruction and positioning applications , verification of simulation conclusion under complicated conditions , and processing the results show that the conclusion of the simulation is correct , verify the feasibility and effectiveness of using acoustic imaging techniques to identify noise source method . Explore planar acoustic holography and cylindrical acoustic holography , and lay the foundation for future research work .

Related Dissertations

  1. Research on the Source Identification of Moving Target in Semi-space Based on Acoustic Holography,TP391.41
  2. The Application Research on Green’s Functions in Planar Near-field Acoustic Holography,TB52
  3. Investigation on Acoustic Holography Technique for Main Sound Sources Identification of the Targets Near Water Surface,TB566
  4. Modeling and Simulation of Underwater Acoustic Daylight Imaging System Using Reflector,U666.7
  5. Study on Moving Noise Source Identification,TB535
  6. A Study on the Errors Existing in Measurement and Reconstruction of Nearfield Planar Acoustic Holography,TG806
  7. Cyclostationary sound field non- conformal surface NAH theoretical and experimental research,TB535
  8. Fault Feature Extraction Technique Based on Patch Near-Field Acoustical Holography,TB533
  9. Study on Multiple Sub-array Beam-space High Resolution Uncerwater Acoustic Imaging Technology,TP391.41
  10. Acoustic holography based on neural networks for moving noise source identification,TM937.4
  11. Research of the Methods for the Identification of Niose Sources Based on the Acoustic Holography Techniques,U661
  12. Design & Implementation of Data Acquisition System in Digital Imaging Sonar,TP274.2
  13. Cylinder Near-field Acoustical Holography in Half-space and Its Visualization,TP391.41
  14. Casing Detection Technology in Zhongyuan Oil Field,P631.81
  15. The Research on the Identification Technique of Complex Structure Sound Source in Semi-space,O427
  16. Theoretical and Experimental Study on Patch Near-field Acoustic Holography Based the Distributed Source Boundary Point Method,TB52
  17. Sound Source Identification on the Basis of Nearfield Acoustic Holography,TB561
  18. Research on Mechanical Noise Sources Identification and Feature Extraction,TH17
  19. Investigation on Statistically Optimal and Wave Superposition Methods Based Nearfield Acoustic Holography,O426.2
  20. Investigation on Acoustic Holography Technique for Underwater Sound Source Identification and Position by Continuously Scanning Sound Field,TB561

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Automatic detection system using a variety of new technologies
© 2012 www.DissertationTopic.Net  Mobile